# HG changeset patch
# User lost
# Date 1233122312 0
# Node ID 050864a47b38d4115d190b26ef3bdb7047d9d088
# Parent 8e69528eef9183b6e7324b7eaa2dadf30d7a6c4e
repo reorg
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/COPYING
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/COPYING Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
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+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+
+ Copyright (C)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ Copyright (C)
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+.
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/INSTALL
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/INSTALL Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,237 @@
+Installation Instructions
+*************************
+
+Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,
+2006, 2007 Free Software Foundation, Inc.
+
+This file is free documentation; the Free Software Foundation gives
+unlimited permission to copy, distribute and modify it.
+
+Basic Installation
+==================
+
+Briefly, the shell commands `./configure; make; make install' should
+configure, build, and install this package. The following
+more-detailed instructions are generic; see the `README' file for
+instructions specific to this package.
+
+ The `configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation. It uses
+those values to create a `Makefile' in each directory of the package.
+It may also create one or more `.h' files containing system-dependent
+definitions. Finally, it creates a shell script `config.status' that
+you can run in the future to recreate the current configuration, and a
+file `config.log' containing compiler output (useful mainly for
+debugging `configure').
+
+ It can also use an optional file (typically called `config.cache'
+and enabled with `--cache-file=config.cache' or simply `-C') that saves
+the results of its tests to speed up reconfiguring. Caching is
+disabled by default to prevent problems with accidental use of stale
+cache files.
+
+ If you need to do unusual things to compile the package, please try
+to figure out how `configure' could check whether to do them, and mail
+diffs or instructions to the address given in the `README' so they can
+be considered for the next release. If you are using the cache, and at
+some point `config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+ The file `configure.ac' (or `configure.in') is used to create
+`configure' by a program called `autoconf'. You need `configure.ac' if
+you want to change it or regenerate `configure' using a newer version
+of `autoconf'.
+
+The simplest way to compile this package is:
+
+ 1. `cd' to the directory containing the package's source code and type
+ `./configure' to configure the package for your system.
+
+ Running `configure' might take a while. While running, it prints
+ some messages telling which features it is checking for.
+
+ 2. Type `make' to compile the package.
+
+ 3. Optionally, type `make check' to run any self-tests that come with
+ the package.
+
+ 4. Type `make install' to install the programs and any data files and
+ documentation.
+
+ 5. You can remove the program binaries and object files from the
+ source code directory by typing `make clean'. To also remove the
+ files that `configure' created (so you can compile the package for
+ a different kind of computer), type `make distclean'. There is
+ also a `make maintainer-clean' target, but that is intended mainly
+ for the package's developers. If you use it, you may have to get
+ all sorts of other programs in order to regenerate files that came
+ with the distribution.
+
+ 6. Often, you can also type `make uninstall' to remove the installed
+ files again.
+
+Compilers and Options
+=====================
+
+Some systems require unusual options for compilation or linking that the
+`configure' script does not know about. Run `./configure --help' for
+details on some of the pertinent environment variables.
+
+ You can give `configure' initial values for configuration parameters
+by setting variables in the command line or in the environment. Here
+is an example:
+
+ ./configure CC=c99 CFLAGS=-g LIBS=-lposix
+
+ *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory. To do this, you can use GNU `make'. `cd' to the
+directory where you want the object files and executables to go and run
+the `configure' script. `configure' automatically checks for the
+source code in the directory that `configure' is in and in `..'.
+
+ With a non-GNU `make', it is safer to compile the package for one
+architecture at a time in the source code directory. After you have
+installed the package for one architecture, use `make distclean' before
+reconfiguring for another architecture.
+
+Installation Names
+==================
+
+By default, `make install' installs the package's commands under
+`/usr/local/bin', include files under `/usr/local/include', etc. You
+can specify an installation prefix other than `/usr/local' by giving
+`configure' the option `--prefix=PREFIX'.
+
+ You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files. If you
+pass the option `--exec-prefix=PREFIX' to `configure', the package uses
+PREFIX as the prefix for installing programs and libraries.
+Documentation and other data files still use the regular prefix.
+
+ In addition, if you use an unusual directory layout you can give
+options like `--bindir=DIR' to specify different values for particular
+kinds of files. Run `configure --help' for a list of the directories
+you can set and what kinds of files go in them.
+
+ If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving `configure' the
+option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
+
+Optional Features
+=================
+
+Some packages pay attention to `--enable-FEATURE' options to
+`configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to `--with-PACKAGE' options, where PACKAGE
+is something like `gnu-as' or `x' (for the X Window System). The
+`README' should mention any `--enable-' and `--with-' options that the
+package recognizes.
+
+ For packages that use the X Window System, `configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the `configure' options `--x-includes=DIR' and
+`--x-libraries=DIR' to specify their locations.
+
+Specifying the System Type
+==========================
+
+There may be some features `configure' cannot figure out automatically,
+but needs to determine by the type of machine the package will run on.
+Usually, assuming the package is built to be run on the _same_
+architectures, `configure' can figure that out, but if it prints a
+message saying it cannot guess the machine type, give it the
+`--build=TYPE' option. TYPE can either be a short name for the system
+type, such as `sun4', or a canonical name which has the form:
+
+ CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+ OS KERNEL-OS
+
+ See the file `config.sub' for the possible values of each field. If
+`config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+ If you are _building_ compiler tools for cross-compiling, you should
+use the option `--target=TYPE' to select the type of system they will
+produce code for.
+
+ If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with `--host=TYPE'.
+
+Sharing Defaults
+================
+
+If you want to set default values for `configure' scripts to share, you
+can create a site shell script called `config.site' that gives default
+values for variables like `CC', `cache_file', and `prefix'.
+`configure' looks for `PREFIX/share/config.site' if it exists, then
+`PREFIX/etc/config.site' if it exists. Or, you can set the
+`CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all `configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+Variables not defined in a site shell script can be set in the
+environment passed to `configure'. However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost. In order to avoid this problem, you should set
+them in the `configure' command line, using `VAR=value'. For example:
+
+ ./configure CC=/usr/local2/bin/gcc
+
+causes the specified `gcc' to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+Unfortunately, this technique does not work for `CONFIG_SHELL' due to
+an Autoconf bug. Until the bug is fixed you can use this workaround:
+
+ CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
+
+`configure' Invocation
+======================
+
+`configure' recognizes the following options to control how it operates.
+
+`--help'
+`-h'
+ Print a summary of the options to `configure', and exit.
+
+`--version'
+`-V'
+ Print the version of Autoconf used to generate the `configure'
+ script, and exit.
+
+`--cache-file=FILE'
+ Enable the cache: use and save the results of the tests in FILE,
+ traditionally `config.cache'. FILE defaults to `/dev/null' to
+ disable caching.
+
+`--config-cache'
+`-C'
+ Alias for `--cache-file=config.cache'.
+
+`--quiet'
+`--silent'
+`-q'
+ Do not print messages saying which checks are being made. To
+ suppress all normal output, redirect it to `/dev/null' (any error
+ messages will still be shown).
+
+`--srcdir=DIR'
+ Look for the package's source code in directory DIR. Usually
+ `configure' can determine that directory automatically.
+
+`configure' also accepts some other, not widely useful, options. Run
+`configure --help' for more details.
+
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/Makefile.am
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/Makefile.am Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,2 @@
+SUBDIRS = src
+DIST_SUBDIRS = doc src
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/README
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/README Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,5 @@
+This distribution constitutes the LWLINK linker software. It is a companion
+to the LWASM cross-assembler.
+
+All files that form a part of this distribution use the UTF8 character
+encoding method unless otherwise noted.
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/README.MAINT
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/README.MAINT Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,39 @@
+This file is intended for source package maintainers/distributors.
+
+Before a release is made, a branch for that release must be made. Within
+that branch, all files that will be distributed with the particular release
+must be generated and added to the repository on that branch. Once the
+release is deemed stable and ready for release, the release tag should
+be generated from the head of that particular branch. Thus all release
+series will have the autotool generated files in the repository.
+
+Any branch not directly intended to be a release need not include the
+autotool generated files.
+
+The trunk development stream must not include the autotool generated files
+as these are likely to change rapidly and it can cause a great deal of
+confusion for little gain.
+
+By including the generated files in the release branches, it is possible
+to replicate any problems users of the package may have, including if it
+is due to problems with the autotools themselves.
+
+
+Naming of branches and tags should conform to the following guidlines.
+
+1. any branch leading to a release series must be named as the base revision
+of the series. Thus, for a 1.0 release, the branch is called 1.0 and will
+contain the results for a 1.0 release, a 1.0.1 release, and so on. If a
+sub-release will occur, say under 1.0.1, then a branch named "1.0.1" would
+be created and then releases such as 1.0.1.1 would be created. This should
+be avoided if at all possible.
+
+2. any tag for a specific release version will be named as the release. So
+for a 1.0 release, the name would be "1.0". For version 1.0.1.1, the name
+would be "1.0.1.1".
+
+3. branches not associated with a release stream - say for feature development
+or what have you should be named sensibly and should be removed when no longer
+needed. They must not appear to be version numbers.
+
+4. tags not specifying a release must not look like version numbers
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/configure.ac
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/configure.ac Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,10 @@
+AC_INIT([LWLINK], [1.0], [lost@l-w.ca])
+AM_INIT_AUTOMAKE([-Wall -Werror foreign])
+AC_PROG_CC
+AC_CONFIG_HEADERS([src/config.h])
+AC_CONFIG_FILES([
+ Makefile
+ src/Makefile
+ doc/Makefile
+])
+AC_OUTPUT
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/doc/Makefile.am
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/doc/Makefile.am Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,2 @@
+EXTRA_DIST = lwlink.txt scripts.txt
+
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/doc/lwlink.txt
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/doc/lwlink.txt Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,51 @@
+This is the companion linker to LWASM. It reads object files generated by
+LWASM and combines them into an actual binary.
+
+During linking, each file is read into memory. A list of externally
+referenced symbols is made along with where these symbols are referenced.
+Each external reference is checked against all previously loaded files (in
+order of loading) and if a match is found, a note of that fact is made and a
+link between the previously loaded file and the current reference.
+
+Once all files are loaded, the symbol table is checked for any symbols which
+are still unresolved. If any are found, the linking process complains and
+bails out.
+
+Once all the object files have been read, the linker follows a
+pre-determined script for the specified target or a script supplied by the
+user to lay out the binary. The instructions from the script are followed
+blindly as it is assumed the user knows what he is doing.
+
+For each defined section, the linker begins constructing the section data by
+resolving each instance of that section in the order it was encountered. All
+symbols defined by that section (local or exported) are assigned addresses.
+The exact offset into the final section data is recorded for any incomplete
+references in that section. All section base address references are resolved
+to actual addresses at this stage.
+
+Once all sections have been laid out and addresses assigned to all symbols,
+all incomplete references are resolved and the resulting value placed into
+the appropriate data stream. If any references cannot be resolved at this
+stage, the linker will complain and bail out.
+
+Once all sections, symbols, and incomplete references have been resolved,
+the binary will output as appropriate for the specified target.
+
+See the file "scripts.txt" for information about linker scripts and the
+restrictions based on the output target.
+
+The following output targets are supported:
+
+Raw: this is a raw binary with no header information, etc. Suitable for ROM
+images, etc. By default, the raw target starts the binary at address 0, puts
+any section named "init" first, then "code", then all other non-bss
+sections, then all bss sections. Note that any "bss" type section that
+exists anywhere but at the end of the binary (i.e. is between or before one
+or more non-bss sections) will be included as a series of NUL bytes.
+
+DECB: this creates a LOADM style binary according to the linker script. By
+default, this target places the sections in the same order as the raw target
+but implements a load address of $2000. bss sections will not be included in
+the actual output. If a bss section appears between two non-bss sections, a
+new output block will be created in the output file.
+
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/doc/scripts.txt
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/doc/scripts.txt Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,63 @@
+LWLINK linker scripts
+
+A linker script is used to instruct the linker about how to assemble the
+various sections into a completed binary. It consists of a series of
+directives which are considered in the order they are encountered. Any
+section not referenced by a directive is assumed to be loaded after the
+final section explicitly referenced.
+
+The sections will appear in the resulting binary in the order they are
+specified in the script file.
+
+If a referenced section is not found, the linker will behave as though the
+section did exist but had a zero size, no relocations, and no exports.
+
+A section may only be referenced once. Any subsequent references will have
+no effect.
+
+All numbers are hexadecimal.
+
+section load
+
+This causes the section to load at . For raw target, only one
+"load at" entry is allowed for non-bss sections and it must be the first
+one. For raw targets, it affects the addresses the linker assigns to symbols
+but has no other affect on the output. bss sections may all have separate
+load addresses but since they will not appear in the binary anyway, this is
+okay.
+
+For the DECB target, each "load" entry will cause a new "block" to be
+output to the binary which will contain the load address. It is legal for
+sections to overlap in this manner - the linker assumes the loader will sort
+everything out.
+
+section
+
+This will cause the section to load after the previously listed
+section.
+
+exec
+
+This will cause the execution address (entry point) to be the address
+specified (in hex) *or* the specified symbol name. The symbol name must
+match a symbol that is exported by one of the object files being linked.
+This has no effect for targets that do not encode the entry point into the
+resulting file. If not specified, the entry point is assumed to be address 0
+which is probably not what you want. The default link scripts for targets
+that support this directive automatically starts at the beginning of the
+first section (usually "init" or "code") that is emitted in the binary.
+
+pad
+
+This will cause the output file to be padded with NUL bytes to be exactly
+ bytes in length. This only makes sense for a raw target.
+
+
+If is "*", then any section not already matched by the script will be
+matched. For format *, can be used to select sections which have
+particular flags set (or not set). For instance:
+
+*,!bss This would match all sections that do not have the bss flag set
+*,bss this would match all sections that do have the bss flag set
+
+
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/Makefile.am
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/Makefile.am Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,4 @@
+bin_PROGRAMS = lwlink lwobjdump
+lwlink_SOURCES = main.c lwlink.c util.c readfiles.c expr.c script.c link.c output.c
+lwobjdump_SOURCES = objdump.c util.c
+EXTRA_DIST = lwlink.h util.h expr.h
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/expr.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/expr.c Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,356 @@
+/*
+expr.c
+Copyright © 2009 William Astle
+
+This file is part of LWLINK.
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+*/
+
+/*
+This file contains the actual expression evaluator
+*/
+
+#define __expr_c_seen__
+
+#include
+#include
+#include
+
+#include "expr.h"
+#include "util.h"
+
+lw_expr_stack_t *lw_expr_stack_create(void)
+{
+ lw_expr_stack_t *s;
+
+ s = lw_malloc(sizeof(lw_expr_stack_t));
+ s -> head = NULL;
+ s -> tail = NULL;
+ return s;
+}
+
+void lw_expr_stack_free(lw_expr_stack_t *s)
+{
+ while (s -> head)
+ {
+ s -> tail = s -> head;
+ s -> head = s -> head -> next;
+ lw_expr_term_free(s -> tail -> term);
+ lw_free(s -> tail);
+ }
+ lw_free(s);
+}
+
+void lw_expr_term_free(lw_expr_term_t *t)
+{
+ if (t)
+ {
+ if (t -> term_type == LW_TERM_SYM)
+ lw_free(t -> symbol);
+ lw_free(t);
+ }
+}
+
+lw_expr_term_t *lw_expr_term_create_oper(int oper)
+{
+ lw_expr_term_t *t;
+
+ t = lw_malloc(sizeof(lw_expr_term_t));
+ t -> term_type = LW_TERM_OPER;
+ t -> value = oper;
+ return t;
+}
+
+lw_expr_term_t *lw_expr_term_create_int(int val)
+{
+ lw_expr_term_t *t;
+
+ t = lw_malloc(sizeof(lw_expr_term_t));
+ t -> term_type = LW_TERM_INT;
+ t -> value = val;
+ return t;
+}
+
+lw_expr_term_t *lw_expr_term_create_sym(char *sym, int symtype)
+{
+ lw_expr_term_t *t;
+
+ t = lw_malloc(sizeof(lw_expr_term_t));
+ t -> term_type = LW_TERM_SYM;
+ t -> symbol = lw_strdup(sym);
+ t -> value = symtype;
+ return t;
+}
+
+lw_expr_term_t *lw_expr_term_dup(lw_expr_term_t *t)
+{
+ switch (t -> term_type)
+ {
+ case LW_TERM_INT:
+ return lw_expr_term_create_int(t -> value);
+
+ case LW_TERM_OPER:
+ return lw_expr_term_create_oper(t -> value);
+
+ case LW_TERM_SYM:
+ return lw_expr_term_create_sym(t -> symbol, t -> value);
+
+ default:
+ exit(1);
+ }
+// can't get here
+}
+
+void lw_expr_stack_push(lw_expr_stack_t *s, lw_expr_term_t *t)
+{
+ lw_expr_stack_node_t *n;
+
+ if (!s)
+ {
+ exit(1);
+ }
+
+ n = lw_malloc(sizeof(lw_expr_stack_node_t));
+ n -> next = NULL;
+ n -> prev = s -> tail;
+ n -> term = lw_expr_term_dup(t);
+
+ if (s -> head)
+ {
+ s -> tail -> next = n;
+ s -> tail = n;
+ }
+ else
+ {
+ s -> head = n;
+ s -> tail = n;
+ }
+}
+
+lw_expr_term_t *lw_expr_stack_pop(lw_expr_stack_t *s)
+{
+ lw_expr_term_t *t;
+ lw_expr_stack_node_t *n;
+
+ if (!(s -> tail))
+ return NULL;
+
+ n = s -> tail;
+ s -> tail = n -> prev;
+ if (!(n -> prev))
+ {
+ s -> head = NULL;
+ }
+
+ t = n -> term;
+ n -> term = NULL;
+
+ lw_free(n);
+
+ return t;
+}
+
+/*
+take an expression stack s and scan for operations that can be completed
+
+return -1 on error, 0 on no error
+
+possible errors are: division by zero or unknown operator
+
+theory of operation:
+
+scan the stack for an operator which has two constants preceding it (binary)
+or 1 constant preceding it (unary) and if found, perform the calculation
+and replace the operator and its operands with the result
+
+repeat the scan until no futher simplications are found or if there are no
+further operators or only a single term remains
+
+*/
+int lw_expr_reval(lw_expr_stack_t *s, lw_expr_stack_t *(*sfunc)(char *sym, int stype, void *state), void *state)
+{
+ lw_expr_stack_node_t *n, *n2;
+ lw_expr_stack_t *ss;
+ int c;
+
+next_iter_sym:
+ // resolve symbols
+ // symbols that do not resolve to an expression are left alone
+ for (c = 0, n = s -> head; n; n = n -> next)
+ {
+ if (n -> term -> term_type == LW_TERM_SYM)
+ {
+ ss = sfunc(n -> term -> symbol, n -> term -> value, state);
+ if (ss)
+ {
+ c++;
+ // splice in the result stack
+ if (n -> prev)
+ {
+ n -> prev -> next = ss -> head;
+ }
+ else
+ {
+ s -> head = ss -> head;
+ }
+ ss -> head -> prev = n -> prev;
+ ss -> tail -> next = n -> next;
+ if (n -> next)
+ {
+ n -> next -> prev = ss -> tail;
+ }
+ else
+ {
+ s -> tail = ss -> tail;
+ }
+ lw_expr_term_free(n -> term);
+ lw_free(n);
+ n = ss -> tail;
+
+ ss -> head = NULL;
+ ss -> tail = NULL;
+ lw_expr_stack_free(ss);
+ }
+ }
+ }
+ if (c)
+ goto next_iter_sym;
+
+next_iter:
+ // a single term
+ if (s -> head == s -> tail)
+ return 0;
+
+ // search for an operator
+ for (n = s -> head; n; n = n -> next)
+ {
+ if (n -> term -> term_type == LW_TERM_OPER)
+ {
+ if (n -> term -> value == LW_OPER_NEG
+ || n -> term -> value == LW_OPER_COM
+ )
+ {
+ // unary operator
+ if (n -> prev && n -> prev -> term -> term_type == LW_TERM_INT)
+ {
+ // a unary operator we can resolve
+ // we do the op then remove the term "n" is pointing at
+ if (n -> term -> value == LW_OPER_NEG)
+ {
+ n -> prev -> term -> value = -(n -> prev -> term -> value);
+ }
+ else if (n -> term -> value == LW_OPER_COM)
+ {
+ n -> prev -> term -> value = ~(n -> prev -> term -> value);
+ }
+ n -> prev -> next = n -> next;
+ if (n -> next)
+ n -> next -> prev = n -> prev;
+ else
+ s -> tail = n -> prev;
+
+ lw_expr_term_free(n -> term);
+ lw_free(n);
+ break;
+ }
+ }
+ else
+ {
+ // binary operator
+ if (n -> prev && n -> prev -> prev && n -> prev -> term -> term_type == LW_TERM_INT && n -> prev -> prev -> term -> term_type == LW_TERM_INT)
+ {
+ // a binary operator we can resolve
+ switch (n -> term -> value)
+ {
+ case LW_OPER_PLUS:
+ n -> prev -> prev -> term -> value += n -> prev -> term -> value;
+ break;
+
+ case LW_OPER_MINUS:
+ n -> prev -> prev -> term -> value -= n -> prev -> term -> value;
+ break;
+
+ case LW_OPER_TIMES:
+ n -> prev -> prev -> term -> value *= n -> prev -> term -> value;
+ break;
+
+ case LW_OPER_DIVIDE:
+ if (n -> prev -> term -> value == 0)
+ return -1;
+ n -> prev -> prev -> term -> value /= n -> prev -> term -> value;
+ break;
+
+ case LW_OPER_MOD:
+ if (n -> prev -> term -> value == 0)
+ return -1;
+ n -> prev -> prev -> term -> value %= n -> prev -> term -> value;
+ break;
+
+ case LW_OPER_INTDIV:
+ if (n -> prev -> term -> value == 0)
+ return -1;
+ n -> prev -> prev -> term -> value /= n -> prev -> term -> value;
+ break;
+
+ case LW_OPER_BWAND:
+ n -> prev -> prev -> term -> value &= n -> prev -> term -> value;
+ break;
+
+ case LW_OPER_BWOR:
+ n -> prev -> prev -> term -> value |= n -> prev -> term -> value;
+ break;
+
+ case LW_OPER_BWXOR:
+ n -> prev -> prev -> term -> value ^= n -> prev -> term -> value;
+ break;
+
+ case LW_OPER_AND:
+ n -> prev -> prev -> term -> value = (n -> prev -> term -> value && n -> prev -> prev -> term -> value) ? 1 : 0;
+ break;
+
+ case LW_OPER_OR:
+ n -> prev -> prev -> term -> value = (n -> prev -> term -> value || n -> prev -> prev -> term -> value) ? 1 : 0;
+ break;
+
+ default:
+ // return error if unknown operator!
+ return -1;
+ }
+
+ // now remove the two unneeded entries from the stack
+ n -> prev -> prev -> next = n -> next;
+ if (n -> next)
+ n -> next -> prev = n -> prev -> prev;
+ else
+ s -> tail = n -> prev -> prev;
+
+ lw_expr_term_free(n -> term);
+ lw_expr_term_free(n -> prev -> term);
+ lw_free(n -> prev);
+ lw_free(n);
+ break;
+ }
+ }
+ }
+ }
+ // note for the terminally confused about dynamic memory and pointers:
+ // n will not be NULL even after the lw_free calls above so
+ // this test will still work (n will be a dangling pointer)
+ // (n will only be NULL if we didn't find any operators to simplify)
+ if (n)
+ goto next_iter;
+
+ return 0;
+}
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/expr.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/expr.h Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,107 @@
+/*
+expr.h
+Copyright © 2009 William Astle
+
+This file is part of LWLINK.
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+*/
+
+/*
+Definitions for expression evaluator
+*/
+
+#ifndef __expr_h_seen__
+#define __expr_h_seen__
+
+#ifndef __expr_c_seen__
+#define __expr_E__ extern
+#else
+#define __expr_E__
+#endif
+
+// term types
+#define LW_TERM_NONE 0
+#define LW_TERM_OPER 1 // an operator
+#define LW_TERM_INT 2 // 32 bit signed integer
+#define LW_TERM_SYM 3 // symbol reference
+
+// operator types
+#define LW_OPER_NONE 0
+#define LW_OPER_PLUS 1 // +
+#define LW_OPER_MINUS 2 // -
+#define LW_OPER_TIMES 3 // *
+#define LW_OPER_DIVIDE 4 // /
+#define LW_OPER_MOD 5 // %
+#define LW_OPER_INTDIV 6 // \ (don't end line with \)
+#define LW_OPER_BWAND 7 // bitwise AND
+#define LW_OPER_BWOR 8 // bitwise OR
+#define LW_OPER_BWXOR 9 // bitwise XOR
+#define LW_OPER_AND 10 // boolean AND
+#define LW_OPER_OR 11 // boolean OR
+#define LW_OPER_NEG 12 // - unary negation (2's complement)
+#define LW_OPER_COM 13 // ^ unary 1's complement
+
+
+// term structure
+typedef struct lw_expr_term_s
+{
+ int term_type; // type of term (see above)
+ char *symbol; // name of a symbol
+ int value; // value of the term (int) or operator number (OPER)
+} lw_expr_term_t;
+
+// type for an expression evaluation stack
+typedef struct lw_expr_stack_node_s lw_expr_stack_node_t;
+struct lw_expr_stack_node_s
+{
+ lw_expr_term_t *term;
+ lw_expr_stack_node_t *prev;
+ lw_expr_stack_node_t *next;
+};
+
+typedef struct lw_expr_stack_s
+{
+ lw_expr_stack_node_t *head;
+ lw_expr_stack_node_t *tail;
+} lw_expr_stack_t;
+
+__expr_E__ void lw_expr_term_free(lw_expr_term_t *t);
+__expr_E__ lw_expr_term_t *lw_expr_term_create_oper(int oper);
+__expr_E__ lw_expr_term_t *lw_expr_term_create_sym(char *sym, int symtype);
+__expr_E__ lw_expr_term_t *lw_expr_term_create_int(int val);
+__expr_E__ lw_expr_term_t *lw_expr_term_dup(lw_expr_term_t *t);
+
+__expr_E__ void lw_expr_stack_free(lw_expr_stack_t *s);
+__expr_E__ lw_expr_stack_t *lw_expr_stack_create(void);
+
+__expr_E__ void lw_expr_stack_push(lw_expr_stack_t *s, lw_expr_term_t *t);
+__expr_E__ lw_expr_term_t *lw_expr_stack_pop(lw_expr_stack_t *s);
+
+// simplify expression
+__expr_E__ int lw_expr_reval(lw_expr_stack_t *s, lw_expr_stack_t *(*sfunc)(char *sym, int symtype, void *state), void *state);
+
+// useful macros
+// is the expression "simple" (one term)?
+#define lw_expr_is_simple(s) ((s) -> head == (s) -> tail)
+
+// is the expression constant?
+#define lw_expr_is_constant(s) (lw_expr_is_simple(s) && (!((s) -> head) || (s) -> head -> term -> term_type == LW_TERM_INT))
+
+// get the constant value of an expression or 0 if not constant
+#define lw_expr_get_value(s) (lw_expr_is_constant(s) ? ((s) -> head ? (s) -> head -> term -> value : 0) : 0)
+
+#undef __expr_E__
+
+#endif // __expr_h_seen__
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/link.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/link.c Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,265 @@
+/*
+link.c
+Copyright © 2009 William Astle
+
+This file is part of LWLINK.
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+
+
+Resolve section and symbol addresses; handle incomplete references
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include
+#include
+
+#include "expr.h"
+#include "lwlink.h"
+#include "util.h"
+
+struct section_list *sectlist = NULL;
+int nsects = 0;
+
+// work out section load order and resolve base addresses for each section
+// make a list of sections to load in order
+void resolve_sections(void)
+{
+ int laddr = 0;
+ int ln, sn, fn;
+
+ for (ln = 0; ln < linkscript.nlines; ln++)
+ {
+// printf("Linker script line %d: '%s', %04X, %d, %d\n", ln, linkscript.lines[ln].sectname, linkscript.lines[ln].loadat, linkscript.lines[ln].yesflags, linkscript.lines[ln].noflags);
+ if (linkscript.lines[ln].sectname)
+ {
+ int f = 0;
+ // named section
+ // look for all instances of a section by the specified name
+ // and resolve base addresses and add to the list
+ for (fn = 0; fn < ninputfiles; fn++)
+ {
+ for (sn = 0; sn < inputfiles[fn] -> nsections; sn++)
+ {
+// printf(" Considering %s:%s\n", inputfiles[fn]->filename, inputfiles[fn]->sections[sn].name);
+ if (!strcmp(linkscript.lines[ln].sectname, inputfiles[fn] -> sections[sn].name))
+ {
+ // we have a match
+ sectlist = lw_realloc(sectlist, sizeof(struct section_list) * (nsects + 1));
+ sectlist[nsects].ptr = &(inputfiles[fn] -> sections[sn]);
+
+ inputfiles[fn] -> sections[sn].processed = 1;
+ if (!f && linkscript.lines[ln].loadat >= 0)
+ {
+ f = 1;
+ sectlist[nsects].forceaddr = 1;
+ laddr = linkscript.lines[ln].loadat;
+ }
+ else
+ {
+ sectlist[nsects].forceaddr = 0;
+ }
+ inputfiles[fn] -> sections[sn].loadaddress = laddr;
+ laddr += inputfiles[fn] -> sections[sn].codesize;
+ nsects++;
+ }
+ }
+ }
+ }
+ else
+ {
+ // wildcard section
+ // look for all sections not yet processed that match flags
+
+ int f = 0;
+ int fn0, sn0;
+ char *sname;
+
+ // named section
+ // look for all instances of a section by the specified name
+ // and resolve base addresses and add to the list
+ for (fn0 = 0; fn0 < ninputfiles; fn0++)
+ {
+ for (sn0 = 0; sn0 < inputfiles[fn0] -> nsections; sn0++)
+ {
+ // ignore if the "no flags" bit says to
+ if (linkscript.lines[ln].noflags && (inputfiles[fn0] -> sections[sn0].flags & linkscript.lines[ln].noflags))
+ continue;
+ // ignore unless the yes flags tell us not to
+ if (linkscript.lines[ln].yesflags && (inputfiles[fn0] -> sections[sn0].flags & linkscript.lines[ln].yesflags == 0))
+ continue;
+ if (inputfiles[fn0] -> sections[sn0].processed == 0)
+ {
+ sname = inputfiles[fn0] -> sections[sn0].name;
+ for (fn = 0; fn < ninputfiles; fn++)
+ {
+ for (sn = 0; sn < inputfiles[fn] -> nsections; sn++)
+ {
+ if (!strcmp(sname, inputfiles[fn] -> sections[sn].name))
+ {
+ // we have a match
+ sectlist = lw_realloc(sectlist, sizeof(struct section_list) * (nsects + 1));
+ sectlist[nsects].ptr = &(inputfiles[fn] -> sections[sn]);
+
+ inputfiles[fn] -> sections[sn].processed = 1;
+ if (!f && linkscript.lines[ln].loadat >= 0)
+ {
+ f = 1;
+ sectlist[nsects].forceaddr = 1;
+ laddr = linkscript.lines[ln].loadat;
+ }
+ else
+ {
+ sectlist[nsects].forceaddr = 0;
+ }
+ inputfiles[fn] -> sections[sn].loadaddress = laddr;
+ laddr += inputfiles[fn] -> sections[sn].codesize;
+ nsects++;
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+
+ // theoretically, all the base addresses are set now
+}
+
+// resolve all incomplete references now
+// anything that is unresolvable at this stage will throw an error
+// because we know the load address of every section now
+lw_expr_stack_t *resolve_sym(char *sym, int symtype, void *state)
+{
+ section_t *sect = state;
+ lw_expr_term_t *term;
+ int val = 0, i, fn;
+ lw_expr_stack_t *s;
+ symtab_t *se;
+
+ if (symtype == 1)
+ {
+ // local symbol
+ if (!sym)
+ {
+ val = sect -> loadaddress;
+ goto out;
+ }
+
+ // start with this section
+ for (se = sect -> localsyms; se; se = se -> next)
+ {
+ if (!strcmp(se -> sym, sym))
+ {
+ val = se -> offset + sect -> loadaddress;
+ goto out;
+ }
+ }
+ // not in this section - check all sections in this file
+ for (i = 0; i < sect -> file -> nsections; i++)
+ {
+ for (se = sect -> file -> sections[i].localsyms; se; se = se -> next)
+ {
+ if (!strcmp(se -> sym, sym))
+ {
+ val = se -> offset + sect -> file -> sections[i].loadaddress;
+ goto out;
+ }
+ }
+ }
+ // not found
+ fprintf(stderr, "Local symbol %s not found in %s:%s\n", sym, sect -> file -> filename, sect -> name);
+ exit(1);
+ }
+ else
+ {
+ // external symbol
+ // read all files in order until found (or not found)
+ for (fn = 0; fn < ninputfiles; fn++)
+ {
+ for (i = 0; i < inputfiles[fn] -> nsections; i++)
+ {
+ for (se = inputfiles[fn] -> sections[i].exportedsyms; se; se = se -> next)
+ {
+ if (!strcmp(sym, se -> sym))
+ {
+ val = se -> offset + inputfiles[fn] -> sections[i].loadaddress;
+ goto out;
+ }
+ }
+ }
+ }
+ if (sect)
+ {
+ fprintf(stderr, "External symbol %s not found in %s:%s\n", sym, sect -> file -> filename, sect -> name);
+ }
+ else
+ {
+ fprintf(stderr, "External symbol %s not found\n", sym);
+ }
+ exit(1);
+ }
+ fprintf(stderr, "Shouldn't ever get here!!!\n");
+ exit(88);
+out:
+ s = lw_expr_stack_create();
+ term = lw_expr_term_create_int(val & 0xffff);
+ lw_expr_stack_push(s, term);
+ lw_expr_term_free(term);
+ return s;
+}
+
+void resolve_references(void)
+{
+ int sn;
+ reloc_t *rl;
+ int rval;
+
+ // resolve entry point if required
+ // this must resolve to an *exported* symbol and will resolve to the
+ // first instance of that symbol
+ if (linkscript.execsym)
+ {
+ lw_expr_stack_t *s;
+
+ s = resolve_sym(linkscript.execsym, 0, NULL);
+ linkscript.execaddr = lw_expr_get_value(s);
+ lw_expr_stack_free(s);
+ }
+
+ for (sn = 0; sn < nsects; sn++)
+ {
+ for (rl = sectlist[sn].ptr -> incompletes; rl; rl = rl -> next)
+ {
+ // do a "simplify" on the expression
+ rval = lw_expr_reval(rl -> expr, resolve_sym, sectlist[sn].ptr);
+
+ // is it constant? error out if not
+ if (rval != 0 || !lw_expr_is_constant(rl -> expr))
+ {
+ fprintf(stderr, "Incomplete reference at %s:%s:%02X\n", sectlist[sn].ptr -> file -> filename, sectlist[sn].ptr -> name, rl -> offset);
+ exit(1);
+ }
+
+ // put the value into the relocation address
+ rval = lw_expr_get_value(rl -> expr);
+ sectlist[sn].ptr -> code[rl -> offset] = (rval >> 8) & 0xff;
+ sectlist[sn].ptr -> code[rl -> offset + 1] = rval & 0xff;
+ }
+ }
+}
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/lwlink.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/lwlink.c Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,52 @@
+/*
+lwlink.c
+Copyright © 2009 William Astle
+
+This file is part of LWLINK.
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+
+
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#define __lwlink_c_seen__
+
+#include
+#include
+#include
+#include
+
+#include "lwlink.h"
+#include "util.h"
+
+int debug_level = 0;
+int outformat = OUTPUT_DECB;
+char *outfile = NULL;
+char *scriptfile = NULL;
+
+fileinfo_t **inputfiles = NULL;
+int ninputfiles = 0;
+
+void add_input_file(char *fn)
+{
+ inputfiles = lw_realloc(inputfiles, sizeof(fileinfo_t *) * (ninputfiles + 1));
+ inputfiles[ninputfiles] = lw_malloc(sizeof(fileinfo_t));
+ inputfiles[ninputfiles++] -> filename = lw_strdup(fn);
+}
+
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/lwlink.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/lwlink.h Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,130 @@
+/*
+lwlink.h
+Copyright © 2009 William Astle
+
+This file is part of LWLINK.
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+
+Contains the main defs used by the linker
+*/
+
+
+#ifndef __lwlink_h_seen__
+#define __lwlink_h_seen__
+
+#include "expr.h"
+
+#define OUTPUT_DECB 0 // DECB multirecord format
+#define OUTPUT_RAW 1 // raw sequence of bytes
+
+typedef struct symtab_s symtab_t;
+struct symtab_s
+{
+ unsigned char *sym; // symbol name
+ int offset; // local offset
+// int realval; // resolved value
+ symtab_t *next; // next symbol
+};
+
+typedef struct reloc_s reloc_t;
+struct reloc_s
+{
+ int offset; // where in the section
+ lw_expr_stack_t *expr; // the expression to calculate it
+ reloc_t *next; // ptr to next relocation
+};
+
+typedef struct fileinfo_s fileinfo_t;
+
+#define SECTION_BSS 1
+typedef struct
+{
+ unsigned char *name; // name of the section
+ int flags; // section flags
+ int codesize; // size of the code
+ unsigned char *code; // pointer to the code
+ int loadaddress; // the actual load address of the section
+ int processed; // was the section processed yet?
+
+ symtab_t *localsyms; // local symbol table
+ symtab_t *exportedsyms; // exported symbols table
+
+ reloc_t *incompletes; // table of incomplete references
+
+ fileinfo_t *file; // the file we are in
+} section_t;
+
+struct fileinfo_s
+{
+ char *filename;
+ unsigned char *filedata;
+ long filesize;
+ section_t *sections;
+ int nsections;
+
+};
+
+struct section_list
+{
+ section_t *ptr; // ptr to section structure
+ int forceaddr; // was this force to an address by the link script?
+};
+
+#ifndef __link_c_seen__
+extern struct section_list *sectlist;
+extern int nsects;
+#endif
+
+
+#ifndef __lwlink_c_seen__
+
+extern int debug_level;
+extern int outformat;
+extern char *outfile;
+extern int ninputfiles;
+extern fileinfo_t **inputfiles;
+extern char *scriptfile;
+
+#define __lwlink_E__ extern
+#else
+#define __lwlink_E__
+#endif // __lwlink_c_seen__
+
+__lwlink_E__ void add_input_file(char *fn);
+
+#undef __lwlink_E__
+
+struct scriptline_s
+{
+ char *sectname; // name of section, NULL for wildcard
+ int loadat; // address to load at (or -1)
+ int noflags; // flags to NOT have
+ int yesflags; // flags to HAVE
+};
+
+typedef struct
+{
+ int nlines; // number of lines in the script
+ struct scriptline_s *lines; // the parsed script lines (section)
+ int padsize; // the size to pad to, -1 for none
+ char *execsym; // entry point symbol
+ int execaddr; // execution address (entry point)
+} linkscript_t;
+
+#ifndef __script_c_seen__
+extern linkscript_t linkscript;
+#endif
+
+#endif //__lwlink_h_seen__
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/main.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/main.c Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,155 @@
+/*
+main.c
+Copyright © 2009 William Astle
+
+This file is part of LWLINK.
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+
+
+Implements the program startup code
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include
+#include
+#include
+#include
+
+#include "lwlink.h"
+
+// command line option handling
+const char *argp_program_version = PACKAGE_STRING;
+const char *argp_program_bug_address = PACKAGE_BUGREPORT;
+
+static error_t parse_opts(int key, char *arg, struct argp_state *state)
+{
+ switch (key)
+ {
+ case 'o':
+ // output
+ outfile = arg;
+ break;
+
+ case 's':
+ // script file
+ scriptfile = arg;
+ break;
+
+ case 'd':
+ // debug
+ debug_level++;
+ break;
+
+ case 'b':
+ // decb output
+ outformat = OUTPUT_DECB;
+ break;
+
+ case 'r':
+ // raw binary output
+ outformat = OUTPUT_RAW;
+ break;
+
+ case 'f':
+ // output format
+ if (!strcasecmp(arg, "decb"))
+ outformat = OUTPUT_DECB;
+ else if (!strcasecmp(arg, "raw"))
+ outformat = OUTPUT_RAW;
+ else
+ {
+ fprintf(stderr, "Invalid output format: %s\n", arg);
+ exit(1);
+ }
+ break;
+ case ARGP_KEY_END:
+ // done; sanity check
+ if (!outfile)
+ outfile = "a.out";
+ break;
+
+ case ARGP_KEY_ARG:
+ add_input_file(arg);
+ break;
+
+ default:
+ return ARGP_ERR_UNKNOWN;
+ }
+ return 0;
+}
+
+static struct argp_option options[] =
+{
+ { "output", 'o', "FILE", 0,
+ "Output to FILE"},
+ { "debug", 'd', 0, 0,
+ "Set debug mode"},
+ { "format", 'f', "TYPE", 0,
+ "Select output format: decb, raw, obj"},
+ { "decb", 'b', 0, 0,
+ "Generate DECB .bin format output, equivalent of --format=decb"},
+ { "raw", 'r', 0, 0,
+ "Generate raw binary format output, equivalent of --format=raw"},
+ { "script", 's', "FILE", 0,
+ "Specify the linking script (overrides the build in defaults)"},
+ { 0 }
+};
+
+static struct argp argp =
+{
+ options,
+ parse_opts,
+ " ...",
+ "LWLINK, a HD6309 and MC6809 cross-linker"
+};
+
+extern void read_files(void);
+extern void setup_script(void);
+extern void resolve_sections(void);
+extern void resolve_references(void);
+extern void do_output(void);
+
+// main function; parse command line, set up assembler state, and run the
+// assembler on the first file
+int main(int argc, char **argv)
+{
+ argp_parse(&argp, argc, argv, 0, 0, NULL);
+ if (ninputfiles == 0)
+ {
+ fprintf(stderr, "No input files\n");
+ exit(1);
+ }
+
+ // handle the linker script
+ setup_script();
+
+ // read the input files
+ read_files();
+
+ // resolve section bases and section order
+ resolve_sections();
+
+ // resolve incomplete references
+ resolve_references();
+
+ // do the actual output
+ do_output();
+
+ exit(0);
+}
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/objdump.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/objdump.c Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,303 @@
+/*
+objdump.c
+Copyright © 2009 William Astle
+
+This file is part of LWLINK
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+
+
+A standalone program to dump an object file in a text form to stdout
+
+*/
+
+#include
+#include
+
+#include "util.h"
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+void read_lwobj16v0(unsigned char *filedata, long filesize);
+
+/*
+The logic of reading the entire file into memory is simple. All the symbol
+names in the file are NUL terminated strings and can be used directly without
+making additional copies.
+*/
+int main(int argc, char **argv)
+{
+ int i;
+ long size;
+ FILE *f;
+ long bread;
+ unsigned char *filedata;
+
+ if (argc != 2)
+ {
+ fprintf(stderr, "Must specify exactly one input file.\n");
+ exit(1);
+ }
+
+ f = fopen(argv[1], "rb");
+ if (!f)
+ {
+ fprintf(stderr, "Can't open file %s:", argv[1]);
+ perror("");
+ exit(1);
+ }
+ fseek(f, 0, SEEK_END);
+ size = ftell(f);
+ rewind(f);
+
+ filedata = lw_malloc(size);
+
+ bread = fread(filedata, 1, size, f);
+ if (bread < size)
+ {
+ fprintf(stderr, "Short read on file %s (%ld/%ld):", argv[1], bread, size);
+ perror("");
+ exit(1);
+ }
+
+ fclose(f);
+
+ if (!memcmp(filedata, "LWOBJ16", 8))
+ {
+ // read v0 LWOBJ16 file
+ read_lwobj16v0(filedata, size);
+ }
+ else
+ {
+ fprintf(stderr, "%s: unknown file format\n", argv[1]);
+ exit(1);
+ }
+ exit(0);
+}
+
+// this macro is used to bail out if we run off the end of the file data
+// while parsing - it keeps the code below cleaner
+#define NEXTBYTE() do { cc++; if (cc > filesize) { fprintf(stderr, "***invalid file format\n"); exit(1); } } while (0)
+// this macro is used to refer to the current byte in the stream
+#define CURBYTE() (filedata[cc < filesize ? cc : filesize - 1])
+// this one will leave the input pointer past the trailing NUL
+#define CURSTR() read_lwobj16v0_str(&cc, &filedata, filesize)
+unsigned char *read_lwobj16v0_str(long *cc1, unsigned char **filedata1, long filesize)
+{
+ int cc = *cc1;
+ unsigned char *filedata = *filedata1;
+ unsigned char *fp;
+ fp = &CURBYTE();
+ while (CURBYTE())
+ NEXTBYTE();
+ NEXTBYTE();
+ *cc1 = cc;
+ *filedata1 = filedata;
+ return fp;
+}
+// the function below can be switched to dealing with data coming from a
+// source other than an in-memory byte pool by adjusting the input data
+// in "fn" and the above two macros
+void read_lwobj16v0(unsigned char *filedata, long filesize)
+{
+ unsigned char *fp;
+ long cc;
+ int val;
+ int bss;
+
+ static char *opernames[] = {
+ "?",
+ "PLUS",
+ "MINUS",
+ "TIMES",
+ "DIVIDE",
+ "MOD",
+ "INTDIV",
+ "BWAND",
+ "BWOR",
+ "BWXOR",
+ "AND",
+ "OR",
+ "NEG",
+ "COM"
+ };
+ static const int numopers = 13;
+
+ // start reading *after* the magic number
+ cc = 8;
+
+ while (1)
+ {
+ bss = 0;
+
+ // bail out if no more sections
+ if (!(CURBYTE()))
+ break;
+
+ fp = CURSTR();
+
+ printf("SECTION %s\n", fp);
+
+ // read flags
+ while (CURBYTE())
+ {
+ switch (CURBYTE())
+ {
+ case 0x01:
+ printf(" FLAG: BSS\n");
+ bss = 1;
+ break;
+
+ default:
+ printf(" FLAG: %02X (unknown)\n", CURBYTE());
+ break;
+ }
+ NEXTBYTE();
+ }
+ // skip NUL terminating flags
+ NEXTBYTE();
+
+ printf(" Local symbols:\n");
+ // now parse the local symbol table
+ while (CURBYTE())
+ {
+ fp = CURSTR();
+
+ // fp is the symbol name
+ val = (CURBYTE()) << 8;
+ NEXTBYTE();
+ val |= (CURBYTE());
+ NEXTBYTE();
+ // val is now the symbol value
+
+ printf(" %s=%04X\n", fp, val);
+
+ }
+ // skip terminating NUL
+ NEXTBYTE();
+
+ printf(" Exported symbols\n");
+
+ // now parse the exported symbol table
+ while (CURBYTE())
+ {
+ fp = CURSTR();
+
+ // fp is the symbol name
+ val = (CURBYTE()) << 8;
+ NEXTBYTE();
+ val |= (CURBYTE());
+ NEXTBYTE();
+ // val is now the symbol value
+
+ printf(" %s=%04X\n", fp, val);
+ }
+ // skip terminating NUL
+ NEXTBYTE();
+
+ // now parse the incomplete references and make a list of
+ // external references that need resolution
+ printf(" Incomplete references\n");
+ while (CURBYTE())
+ {
+ printf(" (");
+ // parse the expression
+ while (CURBYTE())
+ {
+ int tt = CURBYTE();
+ NEXTBYTE();
+ switch (tt)
+ {
+ case 0x01:
+ // 16 bit integer
+ tt = CURBYTE() << 8;
+ NEXTBYTE();
+ tt |= CURBYTE();
+ NEXTBYTE();
+ // normalize for negatives...
+ if (tt > 0x7fff)
+ tt -= 0x10000;
+ printf(" I16=%d", tt);
+ break;
+
+ case 0x02:
+ // external symbol reference
+ printf(" ES=%s", CURSTR());
+ break;
+
+ case 0x03:
+ // internal symbol reference
+ printf(" IS=%s", CURSTR());
+ break;
+
+ case 0x04:
+ // operator
+ if (CURBYTE() > 0 && CURBYTE() <= numopers)
+ printf(" OP=%s", opernames[CURBYTE()]);
+ else
+ printf(" OP=?");
+ NEXTBYTE();
+ break;
+
+ case 0x05:
+ // section base reference (NULL internal reference is
+ // the section base address
+ printf(" SB");
+ break;
+
+ default:
+ printf(" ERR");
+ }
+ }
+ // skip the NUL
+ NEXTBYTE();
+
+ // fetch the offset
+ val = CURBYTE() << 8;
+ NEXTBYTE();
+ val |= CURBYTE() & 0xff;
+ NEXTBYTE();
+ printf(" ) @ %04X\n", val);
+ }
+ // skip the NUL terminating the relocations
+ NEXTBYTE();
+
+ // now set code location and size and verify that the file
+ // contains data going to the end of the code (if !SECTION_BSS)
+ val = CURBYTE() << 8;
+ NEXTBYTE();
+ val |= CURBYTE();
+ NEXTBYTE();
+
+ printf(" CODE %04X bytes", val);
+
+ // skip the code if we're not in a BSS section
+ if (!bss)
+ {
+ int i;
+ for (i = 0; i < val; i++)
+ {
+ if (! (i % 16))
+ {
+ printf("\n %04X ", i);
+ }
+ printf("%02X", CURBYTE());
+ NEXTBYTE();
+ }
+ }
+ printf("\n");
+ }
+}
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/output.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/output.c Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,127 @@
+/*
+output.c
+Copyright © 2009 William Astle
+
+This file is part of LWLINK.
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+
+
+Actually output the binary
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include
+#include
+
+#include "lwlink.h"
+
+// this prevents warnings about not using the return value of fwrite()
+// and, theoretically, can be replaced with a function that handles things
+// better in the future
+#define writebytes(s, l, c, f) do { int r; r = fwrite((s), (l), (c), (f)); } while (0)
+
+void do_output_decb(FILE *of);
+void do_output_raw(FILE *of);
+
+void do_output(void)
+{
+ FILE *of;
+
+ of = fopen(outfile, "wb");
+ if (!of)
+ {
+ fprintf(stderr, "Cannot open output file %s: ", outfile);
+ perror("");
+ exit(1);
+ }
+
+ switch (outformat)
+ {
+ case OUTPUT_DECB:
+ do_output_decb(of);
+ break;
+
+ case OUTPUT_RAW:
+ do_output_raw(of);
+ break;
+
+ default:
+ fprintf(stderr, "Unknown output format doing output!\n");
+ exit(111);
+ }
+
+ fclose(of);
+}
+
+void do_output_decb(FILE *of)
+{
+ int sn;
+ unsigned char buf[5];
+
+ for (sn = 0; sn < nsects; sn++)
+ {
+ if (sectlist[sn].ptr -> flags & SECTION_BSS)
+ {
+ // no output for a BSS section
+ continue;
+ }
+ if (sectlist[sn].ptr -> codesize == 0)
+ {
+ // don't generate output for a zero size section
+ continue;
+ }
+ // write a preamble
+ buf[0] = 0x00;
+ buf[1] = sectlist[sn].ptr -> codesize >> 8;
+ buf[2] = sectlist[sn].ptr -> codesize & 0xff;
+ buf[3] = sectlist[sn].ptr -> loadaddress >> 8;
+ buf[4] = sectlist[sn].ptr -> loadaddress & 0xff;
+ writebytes(buf, 1, 5, of);
+ writebytes(sectlist[sn].ptr -> code, 1, sectlist[sn].ptr -> codesize, of);
+ }
+ // write a postamble
+ buf[0] = 0xff;
+ buf[1] = 0x00;
+ buf[2] = 0x00;
+ buf[3] = linkscript.execaddr >> 8;
+ buf[4] = linkscript.execaddr & 0xff;
+ writebytes(buf, 1, 5, of);
+}
+
+void do_output_raw(FILE *of)
+{
+ int nskips = 0; // used to output blanks for BSS inline
+ int sn;
+
+ for (sn = 0; sn < nsects; sn++)
+ {
+ if (sectlist[sn].ptr -> flags & SECTION_BSS)
+ {
+ // no output for a BSS section
+ nskips += sectlist[sn].ptr -> codesize;
+ continue;
+ }
+ while (nskips > 0)
+ {
+ // the "" is not an error - it turns into a single NUL byte!
+ writebytes("", 1, 1, of);
+ nskips--;
+ }
+ writebytes(sectlist[sn].ptr -> code, 1, sectlist[sn].ptr -> codesize, of);
+ }
+}
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/readfiles.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/readfiles.c Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,304 @@
+/*
+readfiles.c
+Copyright © 2009 William Astle
+
+This file is part of LWLINK.
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+
+
+Reads input files
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include
+#include
+#include
+#include
+
+#include "lwlink.h"
+#include "util.h"
+
+void read_lwobj16v0(fileinfo_t *fn);
+
+/*
+The logic of reading the entire file into memory is simple. All the symbol
+names in the file are NUL terminated strings and can be used directly without
+making additional copies.
+*/
+void read_files(void)
+{
+ int i;
+ long size;
+ FILE *f;
+ long bread;
+ for (i = 0; i < ninputfiles; i++)
+ {
+ f = fopen(inputfiles[i] -> filename, "rb");
+ if (!f)
+ {
+ fprintf(stderr, "Can't open file %s:", inputfiles[i] -> filename);
+ perror("");
+ exit(1);
+ }
+ fseek(f, 0, SEEK_END);
+ size = ftell(f);
+ rewind(f);
+
+ inputfiles[i] -> filedata = lw_malloc(size);
+ inputfiles[i] -> filesize = size;
+
+ bread = fread(inputfiles[i] -> filedata, 1, size, f);
+ if (bread < size)
+ {
+ fprintf(stderr, "Short read on file %s (%ld/%ld):", inputfiles[i] -> filename, bread, size);
+ perror("");
+ exit(1);
+ }
+
+ fclose(f);
+
+ if (!memcmp(inputfiles[i] -> filedata, "LWOBJ16", 8))
+ {
+ // read v0 LWOBJ16 file
+ read_lwobj16v0(inputfiles[i]);
+ }
+ else
+ {
+ fprintf(stderr, "%s: unknown file format\n", inputfiles[i] -> filename);
+ exit(1);
+ }
+ }
+}
+
+// this macro is used to bail out if we run off the end of the file data
+// while parsing - it keeps the code below cleaner
+#define NEXTBYTE() do { cc++; if (cc > fn -> filesize) { fprintf(stderr, "%s: invalid file format\n", fn -> filename); exit(1); } } while (0)
+// this macro is used to refer to the current byte in the stream
+#define CURBYTE() (fn -> filedata[cc < fn -> filesize ? cc : fn -> filesize - 1])
+// this one will leave the input pointer past the trailing NUL
+#define CURSTR() read_lwobj16v0_str(&cc, fn)
+unsigned char *read_lwobj16v0_str(long *cc1, fileinfo_t *fn)
+{
+ int cc = *cc1;
+ unsigned char *fp;
+ fp = &CURBYTE();
+ while (CURBYTE())
+ NEXTBYTE();
+ NEXTBYTE();
+ *cc1 = cc;
+ return fp;
+}
+// the function below can be switched to dealing with data coming from a
+// source other than an in-memory byte pool by adjusting the input data
+// in "fn" and the above two macros
+void read_lwobj16v0(fileinfo_t *fn)
+{
+ unsigned char *fp;
+ long cc;
+ section_t *s;
+ int val;
+ symtab_t *se;
+
+ // start reading *after* the magic number
+ cc = 8;
+
+ // init data
+ fn -> sections = NULL;
+ fn -> nsections = 0;
+
+ while (1)
+ {
+// NEXTBYTE();
+ // bail out if no more sections
+ if (!(CURBYTE()))
+ break;
+
+ fp = CURSTR();
+
+ // we now have a section name in fp
+ // create new section entry
+ fn -> sections = lw_realloc(fn -> sections, sizeof(section_t) * (fn -> nsections + 1));
+ s = &(fn -> sections[fn -> nsections]);
+ fn -> nsections += 1;
+
+ s -> localsyms = NULL;
+ s -> flags = 0;
+ s -> codesize = 0;
+ s -> name = fp;
+ s -> loadaddress = 0;
+ s -> localsyms = NULL;
+ s -> exportedsyms = NULL;
+ s -> incompletes = NULL;
+ s -> processed = 0;
+ s -> file = fn;
+
+ // read flags
+ while (CURBYTE())
+ {
+ switch (CURBYTE())
+ {
+ case 0x01:
+ s -> flags |= SECTION_BSS;
+ break;
+
+ default:
+ fprintf(stderr, "%s (%s): unrecognized section flag %02X\n", fn -> filename, s -> name, (int)(CURBYTE()));
+ exit(1);
+ }
+ NEXTBYTE();
+ }
+ // skip NUL terminating flags
+ NEXTBYTE();
+
+ // now parse the local symbol table
+ while (CURBYTE())
+ {
+ fp = CURSTR();
+
+ // fp is the symbol name
+ val = (CURBYTE()) << 8;
+ NEXTBYTE();
+ val |= (CURBYTE());
+ NEXTBYTE();
+ // val is now the symbol value
+
+ // create symbol table entry
+ se = lw_malloc(sizeof(symtab_t));
+ se -> next = s -> localsyms;
+ s -> localsyms = se;
+ se -> sym = fp;
+ se -> offset = val;
+ }
+ // skip terminating NUL
+ NEXTBYTE();
+
+ // now parse the exported symbol table
+ while (CURBYTE())
+ {
+ fp = CURSTR();
+
+ // fp is the symbol name
+ val = (CURBYTE()) << 8;
+ NEXTBYTE();
+ val |= (CURBYTE());
+ NEXTBYTE();
+ // val is now the symbol value
+
+ // create symbol table entry
+ se = lw_malloc(sizeof(symtab_t));
+ se -> next = s -> exportedsyms;
+ s -> exportedsyms = se;
+ se -> sym = fp;
+ se -> offset = val;
+ }
+ // skip terminating NUL
+ NEXTBYTE();
+
+ // now parse the incomplete references and make a list of
+ // external references that need resolution
+ while (CURBYTE())
+ {
+ reloc_t *rp;
+ lw_expr_term_t *term;
+
+ // we have a reference
+ rp = lw_malloc(sizeof(reloc_t));
+ rp -> next = s -> incompletes;
+ s -> incompletes = rp;
+ rp -> offset = 0;
+ rp -> expr = lw_expr_stack_create();
+
+ // parse the expression
+ while (CURBYTE())
+ {
+ int tt = CURBYTE();
+ NEXTBYTE();
+ switch (tt)
+ {
+ case 0x01:
+ // 16 bit integer
+ tt = CURBYTE() << 8;
+ NEXTBYTE();
+ tt |= CURBYTE();
+ NEXTBYTE();
+ // normalize for negatives...
+ if (tt > 0x7fff)
+ tt -= 0x10000;
+ term = lw_expr_term_create_int(tt);
+ break;
+
+ case 0x02:
+ // external symbol reference
+ term = lw_expr_term_create_sym(CURSTR(), 0);
+ break;
+
+ case 0x03:
+ // internal symbol reference
+ term = lw_expr_term_create_sym(CURSTR(), 1);
+ break;
+
+ case 0x04:
+ // operator
+ term = lw_expr_term_create_oper(CURBYTE());
+ NEXTBYTE();
+ break;
+
+ case 0x05:
+ // section base reference (NULL internal reference is
+ // the section base address
+ term = lw_expr_term_create_sym(NULL, 1);
+ break;
+
+ default:
+ fprintf(stderr, "%s (%s): bad relocation expression\n", fn -> filename, s -> name);
+ exit(1);
+ }
+ lw_expr_stack_push(rp -> expr, term);
+ lw_expr_term_free(term);
+ }
+ // skip the NUL
+ NEXTBYTE();
+
+ // fetch the offset
+ rp -> offset = CURBYTE() << 8;
+ NEXTBYTE();
+ rp -> offset |= CURBYTE() & 0xff;
+ NEXTBYTE();
+ }
+ // skip the NUL terminating the relocations
+ NEXTBYTE();
+
+ // now set code location and size and verify that the file
+ // contains data going to the end of the code (if !SECTION_BSS)
+ s -> codesize = CURBYTE() << 8;
+ NEXTBYTE();
+ s -> codesize |= CURBYTE();
+ NEXTBYTE();
+
+ s -> code = &(CURBYTE());
+
+ // skip the code if we're not in a BSS section
+ if (!(s -> flags & SECTION_BSS))
+ {
+ int i;
+ for (i = 0; i < s -> codesize; i++)
+ NEXTBYTE();
+ }
+ }
+}
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/script.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/script.c Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,257 @@
+/*
+script.c
+Copyright © 2009 William Astle
+
+This file is part of LWLINK.
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+
+
+Read and parse linker scripts
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include
+#include
+#include
+#include
+
+#include "lwlink.h"
+#include "util.h"
+
+// the built-in DECB target linker script
+static char *decb_script =
+ "section init load 2000\n"
+ "section code\n"
+ "section *,!bss\n"
+ "section *,bss\n"
+ "entry 2000\n"
+ ;
+
+// the built-in RAW target linker script
+static char *raw_script =
+ "section init load 0000\n"
+ "section code\n"
+ "section *,!bss\n"
+ "section *,bss\n"
+ ;
+
+// the "simple" script
+static char *simple_script =
+ "section *,!bss\n"
+ "section *,bss\n"
+ ;
+
+linkscript_t linkscript = { 0, NULL, -1 };
+
+void setup_script()
+{
+ char *script, *oscript;
+ long size;
+
+ // read the file if needed
+ if (scriptfile)
+ {
+ FILE *f;
+ long bread;
+
+ f = fopen(scriptfile, "rb");
+ if (!f)
+ {
+ fprintf(stderr, "Can't open file %s:", scriptfile);
+ perror("");
+ exit(1);
+ }
+ fseek(f, 0, SEEK_END);
+ size = ftell(f);
+ rewind(f);
+
+ script = lw_malloc(size + 2);
+
+ bread = fread(script, 1, size, f);
+ if (bread < size)
+ {
+ fprintf(stderr, "Short read on file %s (%ld/%ld):", scriptfile, bread, size);
+ perror("");
+ exit(1);
+ }
+ fclose(f);
+
+ script[size] = '\n';
+ script[size + 1] = '\0';
+ }
+ else
+ {
+ // fetch defaults based on output mode
+ switch (outformat)
+ {
+ case OUTPUT_RAW:
+ script = raw_script;
+ break;
+
+ case OUTPUT_DECB:
+ script = decb_script;
+ break;
+
+ default:
+ script = simple_script;
+ break;
+ }
+
+ size = strlen(script);
+ }
+
+ oscript = script;
+ // now parse the script file
+ while (*script)
+ {
+ char *ptr, *ptr2, *line;
+
+ for (ptr = script; *ptr && *ptr != '\n' && *ptr != '\r'; ptr++)
+ /* do nothing */ ;
+
+ line = lw_malloc(ptr - script + 1);
+ memcpy(line, script, ptr - script);
+ line[ptr - script] = '\0';
+
+ // skip line terms
+ for (script = ptr + 1; *script == '\n' || *script == '\r'; script++)
+ /* do nothing */ ;
+
+ // ignore leading whitespace
+ for (ptr = line; *ptr && isspace(*ptr); ptr++)
+ /* do nothing */ ;
+
+ // ignore blank lines
+ if (!*ptr)
+ continue;
+
+ for (ptr = line; *ptr && !isspace(*ptr); ptr++)
+ /* do nothing */ ;
+
+ // now ptr points to the char past the first word
+ // NUL it out
+ if (*ptr)
+ *ptr++ = '\0';
+
+ // skip spaces after the first word
+ for ( ; *ptr && isspace(*ptr); ptr++)
+ /* do nothing */ ;
+
+ if (!strcmp(line, "pad"))
+ {
+ // padding
+ // parse the hex number and stow it
+ linkscript.padsize = strtol(ptr, NULL, 16);
+ if (linkscript.padsize < 0)
+ linkscript.padsize = 0;
+ }
+ else if (!strcmp(line, "entry"))
+ {
+ int eaddr;
+
+ eaddr = strtol(ptr, &ptr2, 16);
+ if (*ptr2)
+ {
+ linkscript.execaddr = -1;
+ linkscript.execsym = lw_strdup(ptr);
+ }
+ else
+ {
+ linkscript.execaddr = eaddr;
+ linkscript.execsym = NULL;
+ }
+ }
+ else if (!strcmp(line, "section"))
+ {
+ // section
+ // parse out the section name and flags
+ for (ptr2 = ptr; *ptr2 && !isspace(*ptr2); ptr2++)
+ /* do nothing */ ;
+
+ if (*ptr2)
+ *ptr2++ = '\0';
+
+ while (*ptr2 && isspace(*ptr2))
+ ptr2++;
+
+ // ptr now points to the section name and flags and ptr2
+ // to the first non-space character following
+
+ // then look for "load " clause
+ if (*ptr2)
+ {
+ if (!strncmp(ptr2, "load", 4))
+ {
+ ptr2 += 4;
+ while (*ptr2 && isspace(*ptr2))
+ ptr2++;
+
+ }
+ else
+ {
+ fprintf(stderr, "%s: bad script\n", scriptfile);
+ exit(1);
+ }
+ }
+
+ // now ptr2 points to the load address if there is one
+ // or NUL if not
+ linkscript.lines = lw_realloc(linkscript.lines, sizeof(struct scriptline_s) * (linkscript.nlines + 1));
+
+ linkscript.lines[linkscript.nlines].noflags = 0;
+ linkscript.lines[linkscript.nlines].yesflags = 0;
+ if (*ptr2)
+ linkscript.lines[linkscript.nlines].loadat = strtol(ptr2, NULL, 16);
+ else
+ linkscript.lines[linkscript.nlines].loadat = -1;
+ for (ptr2 = ptr; *ptr2 && *ptr2 != ','; ptr2++)
+ /* do nothing */ ;
+ if (*ptr2)
+ {
+ *ptr2++ = '\0';
+ if (!strcmp(ptr2, "!bss"))
+ {
+ linkscript.lines[linkscript.nlines].noflags = SECTION_BSS;
+ }
+ else if (!strcmp(ptr2, "bss"))
+ {
+ linkscript.lines[linkscript.nlines].yesflags = SECTION_BSS;
+ }
+ else
+ {
+ fprintf(stderr, "%s: bad script\n", scriptfile);
+ exit(1);
+ }
+ }
+ if (ptr[0] == '*' && ptr[1] == '\0')
+ linkscript.lines[linkscript.nlines].sectname = NULL;
+ else
+ linkscript.lines[linkscript.nlines].sectname = lw_strdup(ptr);
+ linkscript.nlines++;
+ }
+ else
+ {
+ fprintf(stderr, "%s: bad script\n", scriptfile);
+ exit(1);
+ }
+ lw_free(line);
+ }
+
+ if (scriptfile)
+ lw_free(oscript);
+}
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/util.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/util.c Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,87 @@
+/*
+util.c
+Copyright © 2009 William Astle
+
+This file is part of LWLINK.
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+*/
+
+/*
+Utility functions
+*/
+
+#define __util_c_seen__
+
+#include
+#include
+#include
+#include
+
+#include "util.h"
+
+void *lw_malloc(int size)
+{
+ void *ptr;
+
+ ptr = malloc(size);
+ if (!ptr)
+ {
+ // bail out; memory allocation error
+ fprintf(stderr, "lw_malloc(): Memory allocation error\n");
+ exit(1);
+ }
+ return ptr;
+}
+
+void *lw_realloc(void *optr, int size)
+{
+ void *ptr;
+
+ if (size == 0)
+ {
+ lw_free(optr);
+ return;
+ }
+
+ ptr = realloc(optr, size);
+ if (!ptr)
+ {
+ fprintf(stderr, "lw_realloc(): memory allocation error\n");
+ exit(1);
+ }
+}
+
+void lw_free(void *ptr)
+{
+ if (ptr)
+ free(ptr);
+}
+
+char *lw_strdup(const char *s)
+{
+ char *d;
+
+ if (!s)
+ return NULL;
+
+ d = strdup(s);
+ if (!d)
+ {
+ fprintf(stderr, "lw_strdup(): memory allocation error\n");
+ exit(1);
+ }
+
+ return d;
+}
diff -r 8e69528eef91 -r 050864a47b38 lwlink-old/trunk/src/util.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlink-old/trunk/src/util.h Wed Jan 28 05:58:32 2009 +0000
@@ -0,0 +1,44 @@
+/*
+util.h
+Copyright © 2009 William Astle
+
+This file is part of LWLINK.
+
+LWLINK is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see .
+*/
+
+/*
+Utility functions
+*/
+
+#ifndef __util_h_seen__
+#define __util_h_seen__
+
+#ifndef __util_c_seen__
+#define __util_E__ extern
+#else
+#define __util_E__
+#endif
+
+// allocate memory
+__util_E__ void *lw_malloc(int size);
+__util_E__ void lw_free(void *ptr);
+__util_E__ void *lw_realloc(void *optr, int size);
+
+// string stuff
+__util_E__ char *lw_strdup(const char *s);
+
+#undef __util_E__
+
+#endif // __util_h_seen__
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/COPYING
--- a/lwlink/trunk/COPYING Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,674 +0,0 @@
- GNU GENERAL PUBLIC LICENSE
- Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc.
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
- Preamble
-
- The GNU General Public License is a free, copyleft license for
-software and other kinds of works.
-
- The licenses for most software and other practical works are designed
-to take away your freedom to share and change the works. By contrast,
-the GNU General Public License is intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
-software for all its users. We, the Free Software Foundation, use the
-GNU General Public License for most of our software; it applies also to
-any other work released this way by its authors. You can apply it to
-your programs, too.
-
- When we speak of free software, we are referring to freedom, not
-price. Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-them if you wish), that you receive source code or can get it if you
-want it, that you can change the software or use pieces of it in new
-free programs, and that you know you can do these things.
-
- To protect your rights, we need to prevent others from denying you
-these rights or asking you to surrender the rights. Therefore, you have
-certain responsibilities if you distribute copies of the software, or if
-you modify it: responsibilities to respect the freedom of others.
-
- For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must pass on to the recipients the same
-freedoms that you received. You must make sure that they, too, receive
-or can get the source code. And you must show them these terms so they
-know their rights.
-
- Developers that use the GNU GPL protect your rights with two steps:
-(1) assert copyright on the software, and (2) offer you this License
-giving you legal permission to copy, distribute and/or modify it.
-
- For the developers' and authors' protection, the GPL clearly explains
-that there is no warranty for this free software. For both users' and
-authors' sake, the GPL requires that modified versions be marked as
-changed, so that their problems will not be attributed erroneously to
-authors of previous versions.
-
- Some devices are designed to deny users access to install or run
-modified versions of the software inside them, although the manufacturer
-can do so. This is fundamentally incompatible with the aim of
-protecting users' freedom to change the software. The systematic
-pattern of such abuse occurs in the area of products for individuals to
-use, which is precisely where it is most unacceptable. Therefore, we
-have designed this version of the GPL to prohibit the practice for those
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-stand ready to extend this provision to those domains in future versions
-of the GPL, as needed to protect the freedom of users.
-
- Finally, every program is threatened constantly by software patents.
-States should not allow patents to restrict development and use of
-software on general-purpose computers, but in those that do, we wish to
-avoid the special danger that patents applied to a free program could
-make it effectively proprietary. To prevent this, the GPL assures that
-patents cannot be used to render the program non-free.
-
- The precise terms and conditions for copying, distribution and
-modification follow.
-
- TERMS AND CONDITIONS
-
- 0. Definitions.
-
- "This License" refers to version 3 of the GNU General Public License.
-
- "Copyright" also means copyright-like laws that apply to other kinds of
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-License. Each licensee is addressed as "you". "Licensees" and
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-receiving the covered work authorizing them to use, propagate, modify
-or convey a specific copy of the covered work, then the patent license
-you grant is automatically extended to all recipients of the covered
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- A patent license is "discriminatory" if it does not include within
-the scope of its coverage, prohibits the exercise of, or is
-conditioned on the non-exercise of one or more of the rights that are
-specifically granted under this License. You may not convey a covered
-work if you are a party to an arrangement with a third party that is
-in the business of distributing software, under which you make payment
-to the third party based on the extent of your activity of conveying
-the work, and under which the third party grants, to any of the
-parties who would receive the covered work from you, a discriminatory
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-conveyed by you (or copies made from those copies), or (b) primarily
-for and in connection with specific products or compilations that
-contain the covered work, unless you entered into that arrangement,
-or that patent license was granted, prior to 28 March 2007.
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- Nothing in this License shall be construed as excluding or limiting
-any implied license or other defenses to infringement that may
-otherwise be available to you under applicable patent law.
-
- 12. No Surrender of Others' Freedom.
-
- If conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License. If you cannot convey a
-covered work so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you may
-not convey it at all. For example, if you agree to terms that obligate you
-to collect a royalty for further conveying from those to whom you convey
-the Program, the only way you could satisfy both those terms and this
-License would be to refrain entirely from conveying the Program.
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- 13. Use with the GNU Affero General Public License.
-
- Notwithstanding any other provision of this License, you have
-permission to link or combine any covered work with a work licensed
-under version 3 of the GNU Affero General Public License into a single
-combined work, and to convey the resulting work. The terms of this
-License will continue to apply to the part which is the covered work,
-but the special requirements of the GNU Affero General Public License,
-section 13, concerning interaction through a network will apply to the
-combination as such.
-
- 14. Revised Versions of this License.
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- The Free Software Foundation may publish revised and/or new versions of
-the GNU General Public License from time to time. Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
- Each version is given a distinguishing version number. If the
-Program specifies that a certain numbered version of the GNU General
-Public License "or any later version" applies to it, you have the
-option of following the terms and conditions either of that numbered
-version or of any later version published by the Free Software
-Foundation. If the Program does not specify a version number of the
-GNU General Public License, you may choose any version ever published
-by the Free Software Foundation.
-
- If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
-
- Later license versions may give you additional or different
-permissions. However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
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-
- THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
- 16. Limitation of Liability.
-
- IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
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- 17. Interpretation of Sections 15 and 16.
-
- If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
- END OF TERMS AND CONDITIONS
-
- How to Apply These Terms to Your New Programs
-
- If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
- To do so, attach the following notices to the program. It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-
- Copyright (C)
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see .
-
-Also add information on how to contact you by electronic and paper mail.
-
- If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
- Copyright (C)
- This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
- This is free software, and you are welcome to redistribute it
- under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License. Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
- You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-.
-
- The GNU General Public License does not permit incorporating your program
-into proprietary programs. If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library. If this is what you want to do, use the GNU Lesser General
-Public License instead of this License. But first, please read
-.
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/INSTALL
--- a/lwlink/trunk/INSTALL Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,237 +0,0 @@
-Installation Instructions
-*************************
-
-Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,
-2006, 2007 Free Software Foundation, Inc.
-
-This file is free documentation; the Free Software Foundation gives
-unlimited permission to copy, distribute and modify it.
-
-Basic Installation
-==================
-
-Briefly, the shell commands `./configure; make; make install' should
-configure, build, and install this package. The following
-more-detailed instructions are generic; see the `README' file for
-instructions specific to this package.
-
- The `configure' shell script attempts to guess correct values for
-various system-dependent variables used during compilation. It uses
-those values to create a `Makefile' in each directory of the package.
-It may also create one or more `.h' files containing system-dependent
-definitions. Finally, it creates a shell script `config.status' that
-you can run in the future to recreate the current configuration, and a
-file `config.log' containing compiler output (useful mainly for
-debugging `configure').
-
- It can also use an optional file (typically called `config.cache'
-and enabled with `--cache-file=config.cache' or simply `-C') that saves
-the results of its tests to speed up reconfiguring. Caching is
-disabled by default to prevent problems with accidental use of stale
-cache files.
-
- If you need to do unusual things to compile the package, please try
-to figure out how `configure' could check whether to do them, and mail
-diffs or instructions to the address given in the `README' so they can
-be considered for the next release. If you are using the cache, and at
-some point `config.cache' contains results you don't want to keep, you
-may remove or edit it.
-
- The file `configure.ac' (or `configure.in') is used to create
-`configure' by a program called `autoconf'. You need `configure.ac' if
-you want to change it or regenerate `configure' using a newer version
-of `autoconf'.
-
-The simplest way to compile this package is:
-
- 1. `cd' to the directory containing the package's source code and type
- `./configure' to configure the package for your system.
-
- Running `configure' might take a while. While running, it prints
- some messages telling which features it is checking for.
-
- 2. Type `make' to compile the package.
-
- 3. Optionally, type `make check' to run any self-tests that come with
- the package.
-
- 4. Type `make install' to install the programs and any data files and
- documentation.
-
- 5. You can remove the program binaries and object files from the
- source code directory by typing `make clean'. To also remove the
- files that `configure' created (so you can compile the package for
- a different kind of computer), type `make distclean'. There is
- also a `make maintainer-clean' target, but that is intended mainly
- for the package's developers. If you use it, you may have to get
- all sorts of other programs in order to regenerate files that came
- with the distribution.
-
- 6. Often, you can also type `make uninstall' to remove the installed
- files again.
-
-Compilers and Options
-=====================
-
-Some systems require unusual options for compilation or linking that the
-`configure' script does not know about. Run `./configure --help' for
-details on some of the pertinent environment variables.
-
- You can give `configure' initial values for configuration parameters
-by setting variables in the command line or in the environment. Here
-is an example:
-
- ./configure CC=c99 CFLAGS=-g LIBS=-lposix
-
- *Note Defining Variables::, for more details.
-
-Compiling For Multiple Architectures
-====================================
-
-You can compile the package for more than one kind of computer at the
-same time, by placing the object files for each architecture in their
-own directory. To do this, you can use GNU `make'. `cd' to the
-directory where you want the object files and executables to go and run
-the `configure' script. `configure' automatically checks for the
-source code in the directory that `configure' is in and in `..'.
-
- With a non-GNU `make', it is safer to compile the package for one
-architecture at a time in the source code directory. After you have
-installed the package for one architecture, use `make distclean' before
-reconfiguring for another architecture.
-
-Installation Names
-==================
-
-By default, `make install' installs the package's commands under
-`/usr/local/bin', include files under `/usr/local/include', etc. You
-can specify an installation prefix other than `/usr/local' by giving
-`configure' the option `--prefix=PREFIX'.
-
- You can specify separate installation prefixes for
-architecture-specific files and architecture-independent files. If you
-pass the option `--exec-prefix=PREFIX' to `configure', the package uses
-PREFIX as the prefix for installing programs and libraries.
-Documentation and other data files still use the regular prefix.
-
- In addition, if you use an unusual directory layout you can give
-options like `--bindir=DIR' to specify different values for particular
-kinds of files. Run `configure --help' for a list of the directories
-you can set and what kinds of files go in them.
-
- If the package supports it, you can cause programs to be installed
-with an extra prefix or suffix on their names by giving `configure' the
-option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
-
-Optional Features
-=================
-
-Some packages pay attention to `--enable-FEATURE' options to
-`configure', where FEATURE indicates an optional part of the package.
-They may also pay attention to `--with-PACKAGE' options, where PACKAGE
-is something like `gnu-as' or `x' (for the X Window System). The
-`README' should mention any `--enable-' and `--with-' options that the
-package recognizes.
-
- For packages that use the X Window System, `configure' can usually
-find the X include and library files automatically, but if it doesn't,
-you can use the `configure' options `--x-includes=DIR' and
-`--x-libraries=DIR' to specify their locations.
-
-Specifying the System Type
-==========================
-
-There may be some features `configure' cannot figure out automatically,
-but needs to determine by the type of machine the package will run on.
-Usually, assuming the package is built to be run on the _same_
-architectures, `configure' can figure that out, but if it prints a
-message saying it cannot guess the machine type, give it the
-`--build=TYPE' option. TYPE can either be a short name for the system
-type, such as `sun4', or a canonical name which has the form:
-
- CPU-COMPANY-SYSTEM
-
-where SYSTEM can have one of these forms:
-
- OS KERNEL-OS
-
- See the file `config.sub' for the possible values of each field. If
-`config.sub' isn't included in this package, then this package doesn't
-need to know the machine type.
-
- If you are _building_ compiler tools for cross-compiling, you should
-use the option `--target=TYPE' to select the type of system they will
-produce code for.
-
- If you want to _use_ a cross compiler, that generates code for a
-platform different from the build platform, you should specify the
-"host" platform (i.e., that on which the generated programs will
-eventually be run) with `--host=TYPE'.
-
-Sharing Defaults
-================
-
-If you want to set default values for `configure' scripts to share, you
-can create a site shell script called `config.site' that gives default
-values for variables like `CC', `cache_file', and `prefix'.
-`configure' looks for `PREFIX/share/config.site' if it exists, then
-`PREFIX/etc/config.site' if it exists. Or, you can set the
-`CONFIG_SITE' environment variable to the location of the site script.
-A warning: not all `configure' scripts look for a site script.
-
-Defining Variables
-==================
-
-Variables not defined in a site shell script can be set in the
-environment passed to `configure'. However, some packages may run
-configure again during the build, and the customized values of these
-variables may be lost. In order to avoid this problem, you should set
-them in the `configure' command line, using `VAR=value'. For example:
-
- ./configure CC=/usr/local2/bin/gcc
-
-causes the specified `gcc' to be used as the C compiler (unless it is
-overridden in the site shell script).
-
-Unfortunately, this technique does not work for `CONFIG_SHELL' due to
-an Autoconf bug. Until the bug is fixed you can use this workaround:
-
- CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
-
-`configure' Invocation
-======================
-
-`configure' recognizes the following options to control how it operates.
-
-`--help'
-`-h'
- Print a summary of the options to `configure', and exit.
-
-`--version'
-`-V'
- Print the version of Autoconf used to generate the `configure'
- script, and exit.
-
-`--cache-file=FILE'
- Enable the cache: use and save the results of the tests in FILE,
- traditionally `config.cache'. FILE defaults to `/dev/null' to
- disable caching.
-
-`--config-cache'
-`-C'
- Alias for `--cache-file=config.cache'.
-
-`--quiet'
-`--silent'
-`-q'
- Do not print messages saying which checks are being made. To
- suppress all normal output, redirect it to `/dev/null' (any error
- messages will still be shown).
-
-`--srcdir=DIR'
- Look for the package's source code in directory DIR. Usually
- `configure' can determine that directory automatically.
-
-`configure' also accepts some other, not widely useful, options. Run
-`configure --help' for more details.
-
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/Makefile.am
--- a/lwlink/trunk/Makefile.am Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,2 +0,0 @@
-SUBDIRS = src
-DIST_SUBDIRS = doc src
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/README
--- a/lwlink/trunk/README Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,5 +0,0 @@
-This distribution constitutes the LWLINK linker software. It is a companion
-to the LWASM cross-assembler.
-
-All files that form a part of this distribution use the UTF8 character
-encoding method unless otherwise noted.
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/README.MAINT
--- a/lwlink/trunk/README.MAINT Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,39 +0,0 @@
-This file is intended for source package maintainers/distributors.
-
-Before a release is made, a branch for that release must be made. Within
-that branch, all files that will be distributed with the particular release
-must be generated and added to the repository on that branch. Once the
-release is deemed stable and ready for release, the release tag should
-be generated from the head of that particular branch. Thus all release
-series will have the autotool generated files in the repository.
-
-Any branch not directly intended to be a release need not include the
-autotool generated files.
-
-The trunk development stream must not include the autotool generated files
-as these are likely to change rapidly and it can cause a great deal of
-confusion for little gain.
-
-By including the generated files in the release branches, it is possible
-to replicate any problems users of the package may have, including if it
-is due to problems with the autotools themselves.
-
-
-Naming of branches and tags should conform to the following guidlines.
-
-1. any branch leading to a release series must be named as the base revision
-of the series. Thus, for a 1.0 release, the branch is called 1.0 and will
-contain the results for a 1.0 release, a 1.0.1 release, and so on. If a
-sub-release will occur, say under 1.0.1, then a branch named "1.0.1" would
-be created and then releases such as 1.0.1.1 would be created. This should
-be avoided if at all possible.
-
-2. any tag for a specific release version will be named as the release. So
-for a 1.0 release, the name would be "1.0". For version 1.0.1.1, the name
-would be "1.0.1.1".
-
-3. branches not associated with a release stream - say for feature development
-or what have you should be named sensibly and should be removed when no longer
-needed. They must not appear to be version numbers.
-
-4. tags not specifying a release must not look like version numbers
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/configure.ac
--- a/lwlink/trunk/configure.ac Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,10 +0,0 @@
-AC_INIT([LWLINK], [1.0], [lost@l-w.ca])
-AM_INIT_AUTOMAKE([-Wall -Werror foreign])
-AC_PROG_CC
-AC_CONFIG_HEADERS([src/config.h])
-AC_CONFIG_FILES([
- Makefile
- src/Makefile
- doc/Makefile
-])
-AC_OUTPUT
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/doc/Makefile.am
--- a/lwlink/trunk/doc/Makefile.am Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,2 +0,0 @@
-EXTRA_DIST = lwlink.txt scripts.txt
-
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/doc/lwlink.txt
--- a/lwlink/trunk/doc/lwlink.txt Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,51 +0,0 @@
-This is the companion linker to LWASM. It reads object files generated by
-LWASM and combines them into an actual binary.
-
-During linking, each file is read into memory. A list of externally
-referenced symbols is made along with where these symbols are referenced.
-Each external reference is checked against all previously loaded files (in
-order of loading) and if a match is found, a note of that fact is made and a
-link between the previously loaded file and the current reference.
-
-Once all files are loaded, the symbol table is checked for any symbols which
-are still unresolved. If any are found, the linking process complains and
-bails out.
-
-Once all the object files have been read, the linker follows a
-pre-determined script for the specified target or a script supplied by the
-user to lay out the binary. The instructions from the script are followed
-blindly as it is assumed the user knows what he is doing.
-
-For each defined section, the linker begins constructing the section data by
-resolving each instance of that section in the order it was encountered. All
-symbols defined by that section (local or exported) are assigned addresses.
-The exact offset into the final section data is recorded for any incomplete
-references in that section. All section base address references are resolved
-to actual addresses at this stage.
-
-Once all sections have been laid out and addresses assigned to all symbols,
-all incomplete references are resolved and the resulting value placed into
-the appropriate data stream. If any references cannot be resolved at this
-stage, the linker will complain and bail out.
-
-Once all sections, symbols, and incomplete references have been resolved,
-the binary will output as appropriate for the specified target.
-
-See the file "scripts.txt" for information about linker scripts and the
-restrictions based on the output target.
-
-The following output targets are supported:
-
-Raw: this is a raw binary with no header information, etc. Suitable for ROM
-images, etc. By default, the raw target starts the binary at address 0, puts
-any section named "init" first, then "code", then all other non-bss
-sections, then all bss sections. Note that any "bss" type section that
-exists anywhere but at the end of the binary (i.e. is between or before one
-or more non-bss sections) will be included as a series of NUL bytes.
-
-DECB: this creates a LOADM style binary according to the linker script. By
-default, this target places the sections in the same order as the raw target
-but implements a load address of $2000. bss sections will not be included in
-the actual output. If a bss section appears between two non-bss sections, a
-new output block will be created in the output file.
-
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/doc/scripts.txt
--- a/lwlink/trunk/doc/scripts.txt Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,63 +0,0 @@
-LWLINK linker scripts
-
-A linker script is used to instruct the linker about how to assemble the
-various sections into a completed binary. It consists of a series of
-directives which are considered in the order they are encountered. Any
-section not referenced by a directive is assumed to be loaded after the
-final section explicitly referenced.
-
-The sections will appear in the resulting binary in the order they are
-specified in the script file.
-
-If a referenced section is not found, the linker will behave as though the
-section did exist but had a zero size, no relocations, and no exports.
-
-A section may only be referenced once. Any subsequent references will have
-no effect.
-
-All numbers are hexadecimal.
-
-section load
-
-This causes the section to load at . For raw target, only one
-"load at" entry is allowed for non-bss sections and it must be the first
-one. For raw targets, it affects the addresses the linker assigns to symbols
-but has no other affect on the output. bss sections may all have separate
-load addresses but since they will not appear in the binary anyway, this is
-okay.
-
-For the DECB target, each "load" entry will cause a new "block" to be
-output to the binary which will contain the load address. It is legal for
-sections to overlap in this manner - the linker assumes the loader will sort
-everything out.
-
-section
-
-This will cause the section to load after the previously listed
-section.
-
-exec
-
-This will cause the execution address (entry point) to be the address
-specified (in hex) *or* the specified symbol name. The symbol name must
-match a symbol that is exported by one of the object files being linked.
-This has no effect for targets that do not encode the entry point into the
-resulting file. If not specified, the entry point is assumed to be address 0
-which is probably not what you want. The default link scripts for targets
-that support this directive automatically starts at the beginning of the
-first section (usually "init" or "code") that is emitted in the binary.
-
-pad
-
-This will cause the output file to be padded with NUL bytes to be exactly
- bytes in length. This only makes sense for a raw target.
-
-
-If is "*", then any section not already matched by the script will be
-matched. For format *, can be used to select sections which have
-particular flags set (or not set). For instance:
-
-*,!bss This would match all sections that do not have the bss flag set
-*,bss this would match all sections that do have the bss flag set
-
-
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/Makefile.am
--- a/lwlink/trunk/src/Makefile.am Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,4 +0,0 @@
-bin_PROGRAMS = lwlink lwobjdump
-lwlink_SOURCES = main.c lwlink.c util.c readfiles.c expr.c script.c link.c output.c
-lwobjdump_SOURCES = objdump.c util.c
-EXTRA_DIST = lwlink.h util.h expr.h
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/expr.c
--- a/lwlink/trunk/src/expr.c Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,356 +0,0 @@
-/*
-expr.c
-Copyright © 2009 William Astle
-
-This file is part of LWLINK.
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-*/
-
-/*
-This file contains the actual expression evaluator
-*/
-
-#define __expr_c_seen__
-
-#include
-#include
-#include
-
-#include "expr.h"
-#include "util.h"
-
-lw_expr_stack_t *lw_expr_stack_create(void)
-{
- lw_expr_stack_t *s;
-
- s = lw_malloc(sizeof(lw_expr_stack_t));
- s -> head = NULL;
- s -> tail = NULL;
- return s;
-}
-
-void lw_expr_stack_free(lw_expr_stack_t *s)
-{
- while (s -> head)
- {
- s -> tail = s -> head;
- s -> head = s -> head -> next;
- lw_expr_term_free(s -> tail -> term);
- lw_free(s -> tail);
- }
- lw_free(s);
-}
-
-void lw_expr_term_free(lw_expr_term_t *t)
-{
- if (t)
- {
- if (t -> term_type == LW_TERM_SYM)
- lw_free(t -> symbol);
- lw_free(t);
- }
-}
-
-lw_expr_term_t *lw_expr_term_create_oper(int oper)
-{
- lw_expr_term_t *t;
-
- t = lw_malloc(sizeof(lw_expr_term_t));
- t -> term_type = LW_TERM_OPER;
- t -> value = oper;
- return t;
-}
-
-lw_expr_term_t *lw_expr_term_create_int(int val)
-{
- lw_expr_term_t *t;
-
- t = lw_malloc(sizeof(lw_expr_term_t));
- t -> term_type = LW_TERM_INT;
- t -> value = val;
- return t;
-}
-
-lw_expr_term_t *lw_expr_term_create_sym(char *sym, int symtype)
-{
- lw_expr_term_t *t;
-
- t = lw_malloc(sizeof(lw_expr_term_t));
- t -> term_type = LW_TERM_SYM;
- t -> symbol = lw_strdup(sym);
- t -> value = symtype;
- return t;
-}
-
-lw_expr_term_t *lw_expr_term_dup(lw_expr_term_t *t)
-{
- switch (t -> term_type)
- {
- case LW_TERM_INT:
- return lw_expr_term_create_int(t -> value);
-
- case LW_TERM_OPER:
- return lw_expr_term_create_oper(t -> value);
-
- case LW_TERM_SYM:
- return lw_expr_term_create_sym(t -> symbol, t -> value);
-
- default:
- exit(1);
- }
-// can't get here
-}
-
-void lw_expr_stack_push(lw_expr_stack_t *s, lw_expr_term_t *t)
-{
- lw_expr_stack_node_t *n;
-
- if (!s)
- {
- exit(1);
- }
-
- n = lw_malloc(sizeof(lw_expr_stack_node_t));
- n -> next = NULL;
- n -> prev = s -> tail;
- n -> term = lw_expr_term_dup(t);
-
- if (s -> head)
- {
- s -> tail -> next = n;
- s -> tail = n;
- }
- else
- {
- s -> head = n;
- s -> tail = n;
- }
-}
-
-lw_expr_term_t *lw_expr_stack_pop(lw_expr_stack_t *s)
-{
- lw_expr_term_t *t;
- lw_expr_stack_node_t *n;
-
- if (!(s -> tail))
- return NULL;
-
- n = s -> tail;
- s -> tail = n -> prev;
- if (!(n -> prev))
- {
- s -> head = NULL;
- }
-
- t = n -> term;
- n -> term = NULL;
-
- lw_free(n);
-
- return t;
-}
-
-/*
-take an expression stack s and scan for operations that can be completed
-
-return -1 on error, 0 on no error
-
-possible errors are: division by zero or unknown operator
-
-theory of operation:
-
-scan the stack for an operator which has two constants preceding it (binary)
-or 1 constant preceding it (unary) and if found, perform the calculation
-and replace the operator and its operands with the result
-
-repeat the scan until no futher simplications are found or if there are no
-further operators or only a single term remains
-
-*/
-int lw_expr_reval(lw_expr_stack_t *s, lw_expr_stack_t *(*sfunc)(char *sym, int stype, void *state), void *state)
-{
- lw_expr_stack_node_t *n, *n2;
- lw_expr_stack_t *ss;
- int c;
-
-next_iter_sym:
- // resolve symbols
- // symbols that do not resolve to an expression are left alone
- for (c = 0, n = s -> head; n; n = n -> next)
- {
- if (n -> term -> term_type == LW_TERM_SYM)
- {
- ss = sfunc(n -> term -> symbol, n -> term -> value, state);
- if (ss)
- {
- c++;
- // splice in the result stack
- if (n -> prev)
- {
- n -> prev -> next = ss -> head;
- }
- else
- {
- s -> head = ss -> head;
- }
- ss -> head -> prev = n -> prev;
- ss -> tail -> next = n -> next;
- if (n -> next)
- {
- n -> next -> prev = ss -> tail;
- }
- else
- {
- s -> tail = ss -> tail;
- }
- lw_expr_term_free(n -> term);
- lw_free(n);
- n = ss -> tail;
-
- ss -> head = NULL;
- ss -> tail = NULL;
- lw_expr_stack_free(ss);
- }
- }
- }
- if (c)
- goto next_iter_sym;
-
-next_iter:
- // a single term
- if (s -> head == s -> tail)
- return 0;
-
- // search for an operator
- for (n = s -> head; n; n = n -> next)
- {
- if (n -> term -> term_type == LW_TERM_OPER)
- {
- if (n -> term -> value == LW_OPER_NEG
- || n -> term -> value == LW_OPER_COM
- )
- {
- // unary operator
- if (n -> prev && n -> prev -> term -> term_type == LW_TERM_INT)
- {
- // a unary operator we can resolve
- // we do the op then remove the term "n" is pointing at
- if (n -> term -> value == LW_OPER_NEG)
- {
- n -> prev -> term -> value = -(n -> prev -> term -> value);
- }
- else if (n -> term -> value == LW_OPER_COM)
- {
- n -> prev -> term -> value = ~(n -> prev -> term -> value);
- }
- n -> prev -> next = n -> next;
- if (n -> next)
- n -> next -> prev = n -> prev;
- else
- s -> tail = n -> prev;
-
- lw_expr_term_free(n -> term);
- lw_free(n);
- break;
- }
- }
- else
- {
- // binary operator
- if (n -> prev && n -> prev -> prev && n -> prev -> term -> term_type == LW_TERM_INT && n -> prev -> prev -> term -> term_type == LW_TERM_INT)
- {
- // a binary operator we can resolve
- switch (n -> term -> value)
- {
- case LW_OPER_PLUS:
- n -> prev -> prev -> term -> value += n -> prev -> term -> value;
- break;
-
- case LW_OPER_MINUS:
- n -> prev -> prev -> term -> value -= n -> prev -> term -> value;
- break;
-
- case LW_OPER_TIMES:
- n -> prev -> prev -> term -> value *= n -> prev -> term -> value;
- break;
-
- case LW_OPER_DIVIDE:
- if (n -> prev -> term -> value == 0)
- return -1;
- n -> prev -> prev -> term -> value /= n -> prev -> term -> value;
- break;
-
- case LW_OPER_MOD:
- if (n -> prev -> term -> value == 0)
- return -1;
- n -> prev -> prev -> term -> value %= n -> prev -> term -> value;
- break;
-
- case LW_OPER_INTDIV:
- if (n -> prev -> term -> value == 0)
- return -1;
- n -> prev -> prev -> term -> value /= n -> prev -> term -> value;
- break;
-
- case LW_OPER_BWAND:
- n -> prev -> prev -> term -> value &= n -> prev -> term -> value;
- break;
-
- case LW_OPER_BWOR:
- n -> prev -> prev -> term -> value |= n -> prev -> term -> value;
- break;
-
- case LW_OPER_BWXOR:
- n -> prev -> prev -> term -> value ^= n -> prev -> term -> value;
- break;
-
- case LW_OPER_AND:
- n -> prev -> prev -> term -> value = (n -> prev -> term -> value && n -> prev -> prev -> term -> value) ? 1 : 0;
- break;
-
- case LW_OPER_OR:
- n -> prev -> prev -> term -> value = (n -> prev -> term -> value || n -> prev -> prev -> term -> value) ? 1 : 0;
- break;
-
- default:
- // return error if unknown operator!
- return -1;
- }
-
- // now remove the two unneeded entries from the stack
- n -> prev -> prev -> next = n -> next;
- if (n -> next)
- n -> next -> prev = n -> prev -> prev;
- else
- s -> tail = n -> prev -> prev;
-
- lw_expr_term_free(n -> term);
- lw_expr_term_free(n -> prev -> term);
- lw_free(n -> prev);
- lw_free(n);
- break;
- }
- }
- }
- }
- // note for the terminally confused about dynamic memory and pointers:
- // n will not be NULL even after the lw_free calls above so
- // this test will still work (n will be a dangling pointer)
- // (n will only be NULL if we didn't find any operators to simplify)
- if (n)
- goto next_iter;
-
- return 0;
-}
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/expr.h
--- a/lwlink/trunk/src/expr.h Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,107 +0,0 @@
-/*
-expr.h
-Copyright © 2009 William Astle
-
-This file is part of LWLINK.
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-*/
-
-/*
-Definitions for expression evaluator
-*/
-
-#ifndef __expr_h_seen__
-#define __expr_h_seen__
-
-#ifndef __expr_c_seen__
-#define __expr_E__ extern
-#else
-#define __expr_E__
-#endif
-
-// term types
-#define LW_TERM_NONE 0
-#define LW_TERM_OPER 1 // an operator
-#define LW_TERM_INT 2 // 32 bit signed integer
-#define LW_TERM_SYM 3 // symbol reference
-
-// operator types
-#define LW_OPER_NONE 0
-#define LW_OPER_PLUS 1 // +
-#define LW_OPER_MINUS 2 // -
-#define LW_OPER_TIMES 3 // *
-#define LW_OPER_DIVIDE 4 // /
-#define LW_OPER_MOD 5 // %
-#define LW_OPER_INTDIV 6 // \ (don't end line with \)
-#define LW_OPER_BWAND 7 // bitwise AND
-#define LW_OPER_BWOR 8 // bitwise OR
-#define LW_OPER_BWXOR 9 // bitwise XOR
-#define LW_OPER_AND 10 // boolean AND
-#define LW_OPER_OR 11 // boolean OR
-#define LW_OPER_NEG 12 // - unary negation (2's complement)
-#define LW_OPER_COM 13 // ^ unary 1's complement
-
-
-// term structure
-typedef struct lw_expr_term_s
-{
- int term_type; // type of term (see above)
- char *symbol; // name of a symbol
- int value; // value of the term (int) or operator number (OPER)
-} lw_expr_term_t;
-
-// type for an expression evaluation stack
-typedef struct lw_expr_stack_node_s lw_expr_stack_node_t;
-struct lw_expr_stack_node_s
-{
- lw_expr_term_t *term;
- lw_expr_stack_node_t *prev;
- lw_expr_stack_node_t *next;
-};
-
-typedef struct lw_expr_stack_s
-{
- lw_expr_stack_node_t *head;
- lw_expr_stack_node_t *tail;
-} lw_expr_stack_t;
-
-__expr_E__ void lw_expr_term_free(lw_expr_term_t *t);
-__expr_E__ lw_expr_term_t *lw_expr_term_create_oper(int oper);
-__expr_E__ lw_expr_term_t *lw_expr_term_create_sym(char *sym, int symtype);
-__expr_E__ lw_expr_term_t *lw_expr_term_create_int(int val);
-__expr_E__ lw_expr_term_t *lw_expr_term_dup(lw_expr_term_t *t);
-
-__expr_E__ void lw_expr_stack_free(lw_expr_stack_t *s);
-__expr_E__ lw_expr_stack_t *lw_expr_stack_create(void);
-
-__expr_E__ void lw_expr_stack_push(lw_expr_stack_t *s, lw_expr_term_t *t);
-__expr_E__ lw_expr_term_t *lw_expr_stack_pop(lw_expr_stack_t *s);
-
-// simplify expression
-__expr_E__ int lw_expr_reval(lw_expr_stack_t *s, lw_expr_stack_t *(*sfunc)(char *sym, int symtype, void *state), void *state);
-
-// useful macros
-// is the expression "simple" (one term)?
-#define lw_expr_is_simple(s) ((s) -> head == (s) -> tail)
-
-// is the expression constant?
-#define lw_expr_is_constant(s) (lw_expr_is_simple(s) && (!((s) -> head) || (s) -> head -> term -> term_type == LW_TERM_INT))
-
-// get the constant value of an expression or 0 if not constant
-#define lw_expr_get_value(s) (lw_expr_is_constant(s) ? ((s) -> head ? (s) -> head -> term -> value : 0) : 0)
-
-#undef __expr_E__
-
-#endif // __expr_h_seen__
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/link.c
--- a/lwlink/trunk/src/link.c Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,265 +0,0 @@
-/*
-link.c
-Copyright © 2009 William Astle
-
-This file is part of LWLINK.
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-
-
-Resolve section and symbol addresses; handle incomplete references
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include
-#include
-
-#include "expr.h"
-#include "lwlink.h"
-#include "util.h"
-
-struct section_list *sectlist = NULL;
-int nsects = 0;
-
-// work out section load order and resolve base addresses for each section
-// make a list of sections to load in order
-void resolve_sections(void)
-{
- int laddr = 0;
- int ln, sn, fn;
-
- for (ln = 0; ln < linkscript.nlines; ln++)
- {
-// printf("Linker script line %d: '%s', %04X, %d, %d\n", ln, linkscript.lines[ln].sectname, linkscript.lines[ln].loadat, linkscript.lines[ln].yesflags, linkscript.lines[ln].noflags);
- if (linkscript.lines[ln].sectname)
- {
- int f = 0;
- // named section
- // look for all instances of a section by the specified name
- // and resolve base addresses and add to the list
- for (fn = 0; fn < ninputfiles; fn++)
- {
- for (sn = 0; sn < inputfiles[fn] -> nsections; sn++)
- {
-// printf(" Considering %s:%s\n", inputfiles[fn]->filename, inputfiles[fn]->sections[sn].name);
- if (!strcmp(linkscript.lines[ln].sectname, inputfiles[fn] -> sections[sn].name))
- {
- // we have a match
- sectlist = lw_realloc(sectlist, sizeof(struct section_list) * (nsects + 1));
- sectlist[nsects].ptr = &(inputfiles[fn] -> sections[sn]);
-
- inputfiles[fn] -> sections[sn].processed = 1;
- if (!f && linkscript.lines[ln].loadat >= 0)
- {
- f = 1;
- sectlist[nsects].forceaddr = 1;
- laddr = linkscript.lines[ln].loadat;
- }
- else
- {
- sectlist[nsects].forceaddr = 0;
- }
- inputfiles[fn] -> sections[sn].loadaddress = laddr;
- laddr += inputfiles[fn] -> sections[sn].codesize;
- nsects++;
- }
- }
- }
- }
- else
- {
- // wildcard section
- // look for all sections not yet processed that match flags
-
- int f = 0;
- int fn0, sn0;
- char *sname;
-
- // named section
- // look for all instances of a section by the specified name
- // and resolve base addresses and add to the list
- for (fn0 = 0; fn0 < ninputfiles; fn0++)
- {
- for (sn0 = 0; sn0 < inputfiles[fn0] -> nsections; sn0++)
- {
- // ignore if the "no flags" bit says to
- if (linkscript.lines[ln].noflags && (inputfiles[fn0] -> sections[sn0].flags & linkscript.lines[ln].noflags))
- continue;
- // ignore unless the yes flags tell us not to
- if (linkscript.lines[ln].yesflags && (inputfiles[fn0] -> sections[sn0].flags & linkscript.lines[ln].yesflags == 0))
- continue;
- if (inputfiles[fn0] -> sections[sn0].processed == 0)
- {
- sname = inputfiles[fn0] -> sections[sn0].name;
- for (fn = 0; fn < ninputfiles; fn++)
- {
- for (sn = 0; sn < inputfiles[fn] -> nsections; sn++)
- {
- if (!strcmp(sname, inputfiles[fn] -> sections[sn].name))
- {
- // we have a match
- sectlist = lw_realloc(sectlist, sizeof(struct section_list) * (nsects + 1));
- sectlist[nsects].ptr = &(inputfiles[fn] -> sections[sn]);
-
- inputfiles[fn] -> sections[sn].processed = 1;
- if (!f && linkscript.lines[ln].loadat >= 0)
- {
- f = 1;
- sectlist[nsects].forceaddr = 1;
- laddr = linkscript.lines[ln].loadat;
- }
- else
- {
- sectlist[nsects].forceaddr = 0;
- }
- inputfiles[fn] -> sections[sn].loadaddress = laddr;
- laddr += inputfiles[fn] -> sections[sn].codesize;
- nsects++;
- }
- }
- }
- }
- }
- }
- }
- }
-
- // theoretically, all the base addresses are set now
-}
-
-// resolve all incomplete references now
-// anything that is unresolvable at this stage will throw an error
-// because we know the load address of every section now
-lw_expr_stack_t *resolve_sym(char *sym, int symtype, void *state)
-{
- section_t *sect = state;
- lw_expr_term_t *term;
- int val = 0, i, fn;
- lw_expr_stack_t *s;
- symtab_t *se;
-
- if (symtype == 1)
- {
- // local symbol
- if (!sym)
- {
- val = sect -> loadaddress;
- goto out;
- }
-
- // start with this section
- for (se = sect -> localsyms; se; se = se -> next)
- {
- if (!strcmp(se -> sym, sym))
- {
- val = se -> offset + sect -> loadaddress;
- goto out;
- }
- }
- // not in this section - check all sections in this file
- for (i = 0; i < sect -> file -> nsections; i++)
- {
- for (se = sect -> file -> sections[i].localsyms; se; se = se -> next)
- {
- if (!strcmp(se -> sym, sym))
- {
- val = se -> offset + sect -> file -> sections[i].loadaddress;
- goto out;
- }
- }
- }
- // not found
- fprintf(stderr, "Local symbol %s not found in %s:%s\n", sym, sect -> file -> filename, sect -> name);
- exit(1);
- }
- else
- {
- // external symbol
- // read all files in order until found (or not found)
- for (fn = 0; fn < ninputfiles; fn++)
- {
- for (i = 0; i < inputfiles[fn] -> nsections; i++)
- {
- for (se = inputfiles[fn] -> sections[i].exportedsyms; se; se = se -> next)
- {
- if (!strcmp(sym, se -> sym))
- {
- val = se -> offset + inputfiles[fn] -> sections[i].loadaddress;
- goto out;
- }
- }
- }
- }
- if (sect)
- {
- fprintf(stderr, "External symbol %s not found in %s:%s\n", sym, sect -> file -> filename, sect -> name);
- }
- else
- {
- fprintf(stderr, "External symbol %s not found\n", sym);
- }
- exit(1);
- }
- fprintf(stderr, "Shouldn't ever get here!!!\n");
- exit(88);
-out:
- s = lw_expr_stack_create();
- term = lw_expr_term_create_int(val & 0xffff);
- lw_expr_stack_push(s, term);
- lw_expr_term_free(term);
- return s;
-}
-
-void resolve_references(void)
-{
- int sn;
- reloc_t *rl;
- int rval;
-
- // resolve entry point if required
- // this must resolve to an *exported* symbol and will resolve to the
- // first instance of that symbol
- if (linkscript.execsym)
- {
- lw_expr_stack_t *s;
-
- s = resolve_sym(linkscript.execsym, 0, NULL);
- linkscript.execaddr = lw_expr_get_value(s);
- lw_expr_stack_free(s);
- }
-
- for (sn = 0; sn < nsects; sn++)
- {
- for (rl = sectlist[sn].ptr -> incompletes; rl; rl = rl -> next)
- {
- // do a "simplify" on the expression
- rval = lw_expr_reval(rl -> expr, resolve_sym, sectlist[sn].ptr);
-
- // is it constant? error out if not
- if (rval != 0 || !lw_expr_is_constant(rl -> expr))
- {
- fprintf(stderr, "Incomplete reference at %s:%s:%02X\n", sectlist[sn].ptr -> file -> filename, sectlist[sn].ptr -> name, rl -> offset);
- exit(1);
- }
-
- // put the value into the relocation address
- rval = lw_expr_get_value(rl -> expr);
- sectlist[sn].ptr -> code[rl -> offset] = (rval >> 8) & 0xff;
- sectlist[sn].ptr -> code[rl -> offset + 1] = rval & 0xff;
- }
- }
-}
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/lwlink.c
--- a/lwlink/trunk/src/lwlink.c Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,52 +0,0 @@
-/*
-lwlink.c
-Copyright © 2009 William Astle
-
-This file is part of LWLINK.
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-
-
-
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#define __lwlink_c_seen__
-
-#include
-#include
-#include
-#include
-
-#include "lwlink.h"
-#include "util.h"
-
-int debug_level = 0;
-int outformat = OUTPUT_DECB;
-char *outfile = NULL;
-char *scriptfile = NULL;
-
-fileinfo_t **inputfiles = NULL;
-int ninputfiles = 0;
-
-void add_input_file(char *fn)
-{
- inputfiles = lw_realloc(inputfiles, sizeof(fileinfo_t *) * (ninputfiles + 1));
- inputfiles[ninputfiles] = lw_malloc(sizeof(fileinfo_t));
- inputfiles[ninputfiles++] -> filename = lw_strdup(fn);
-}
-
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/lwlink.h
--- a/lwlink/trunk/src/lwlink.h Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,130 +0,0 @@
-/*
-lwlink.h
-Copyright © 2009 William Astle
-
-This file is part of LWLINK.
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-
-Contains the main defs used by the linker
-*/
-
-
-#ifndef __lwlink_h_seen__
-#define __lwlink_h_seen__
-
-#include "expr.h"
-
-#define OUTPUT_DECB 0 // DECB multirecord format
-#define OUTPUT_RAW 1 // raw sequence of bytes
-
-typedef struct symtab_s symtab_t;
-struct symtab_s
-{
- unsigned char *sym; // symbol name
- int offset; // local offset
-// int realval; // resolved value
- symtab_t *next; // next symbol
-};
-
-typedef struct reloc_s reloc_t;
-struct reloc_s
-{
- int offset; // where in the section
- lw_expr_stack_t *expr; // the expression to calculate it
- reloc_t *next; // ptr to next relocation
-};
-
-typedef struct fileinfo_s fileinfo_t;
-
-#define SECTION_BSS 1
-typedef struct
-{
- unsigned char *name; // name of the section
- int flags; // section flags
- int codesize; // size of the code
- unsigned char *code; // pointer to the code
- int loadaddress; // the actual load address of the section
- int processed; // was the section processed yet?
-
- symtab_t *localsyms; // local symbol table
- symtab_t *exportedsyms; // exported symbols table
-
- reloc_t *incompletes; // table of incomplete references
-
- fileinfo_t *file; // the file we are in
-} section_t;
-
-struct fileinfo_s
-{
- char *filename;
- unsigned char *filedata;
- long filesize;
- section_t *sections;
- int nsections;
-
-};
-
-struct section_list
-{
- section_t *ptr; // ptr to section structure
- int forceaddr; // was this force to an address by the link script?
-};
-
-#ifndef __link_c_seen__
-extern struct section_list *sectlist;
-extern int nsects;
-#endif
-
-
-#ifndef __lwlink_c_seen__
-
-extern int debug_level;
-extern int outformat;
-extern char *outfile;
-extern int ninputfiles;
-extern fileinfo_t **inputfiles;
-extern char *scriptfile;
-
-#define __lwlink_E__ extern
-#else
-#define __lwlink_E__
-#endif // __lwlink_c_seen__
-
-__lwlink_E__ void add_input_file(char *fn);
-
-#undef __lwlink_E__
-
-struct scriptline_s
-{
- char *sectname; // name of section, NULL for wildcard
- int loadat; // address to load at (or -1)
- int noflags; // flags to NOT have
- int yesflags; // flags to HAVE
-};
-
-typedef struct
-{
- int nlines; // number of lines in the script
- struct scriptline_s *lines; // the parsed script lines (section)
- int padsize; // the size to pad to, -1 for none
- char *execsym; // entry point symbol
- int execaddr; // execution address (entry point)
-} linkscript_t;
-
-#ifndef __script_c_seen__
-extern linkscript_t linkscript;
-#endif
-
-#endif //__lwlink_h_seen__
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/main.c
--- a/lwlink/trunk/src/main.c Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,155 +0,0 @@
-/*
-main.c
-Copyright © 2009 William Astle
-
-This file is part of LWLINK.
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-
-
-Implements the program startup code
-
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include
-#include
-#include
-#include
-
-#include "lwlink.h"
-
-// command line option handling
-const char *argp_program_version = PACKAGE_STRING;
-const char *argp_program_bug_address = PACKAGE_BUGREPORT;
-
-static error_t parse_opts(int key, char *arg, struct argp_state *state)
-{
- switch (key)
- {
- case 'o':
- // output
- outfile = arg;
- break;
-
- case 's':
- // script file
- scriptfile = arg;
- break;
-
- case 'd':
- // debug
- debug_level++;
- break;
-
- case 'b':
- // decb output
- outformat = OUTPUT_DECB;
- break;
-
- case 'r':
- // raw binary output
- outformat = OUTPUT_RAW;
- break;
-
- case 'f':
- // output format
- if (!strcasecmp(arg, "decb"))
- outformat = OUTPUT_DECB;
- else if (!strcasecmp(arg, "raw"))
- outformat = OUTPUT_RAW;
- else
- {
- fprintf(stderr, "Invalid output format: %s\n", arg);
- exit(1);
- }
- break;
- case ARGP_KEY_END:
- // done; sanity check
- if (!outfile)
- outfile = "a.out";
- break;
-
- case ARGP_KEY_ARG:
- add_input_file(arg);
- break;
-
- default:
- return ARGP_ERR_UNKNOWN;
- }
- return 0;
-}
-
-static struct argp_option options[] =
-{
- { "output", 'o', "FILE", 0,
- "Output to FILE"},
- { "debug", 'd', 0, 0,
- "Set debug mode"},
- { "format", 'f', "TYPE", 0,
- "Select output format: decb, raw, obj"},
- { "decb", 'b', 0, 0,
- "Generate DECB .bin format output, equivalent of --format=decb"},
- { "raw", 'r', 0, 0,
- "Generate raw binary format output, equivalent of --format=raw"},
- { "script", 's', "FILE", 0,
- "Specify the linking script (overrides the build in defaults)"},
- { 0 }
-};
-
-static struct argp argp =
-{
- options,
- parse_opts,
- " ...",
- "LWLINK, a HD6309 and MC6809 cross-linker"
-};
-
-extern void read_files(void);
-extern void setup_script(void);
-extern void resolve_sections(void);
-extern void resolve_references(void);
-extern void do_output(void);
-
-// main function; parse command line, set up assembler state, and run the
-// assembler on the first file
-int main(int argc, char **argv)
-{
- argp_parse(&argp, argc, argv, 0, 0, NULL);
- if (ninputfiles == 0)
- {
- fprintf(stderr, "No input files\n");
- exit(1);
- }
-
- // handle the linker script
- setup_script();
-
- // read the input files
- read_files();
-
- // resolve section bases and section order
- resolve_sections();
-
- // resolve incomplete references
- resolve_references();
-
- // do the actual output
- do_output();
-
- exit(0);
-}
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/objdump.c
--- a/lwlink/trunk/src/objdump.c Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,303 +0,0 @@
-/*
-objdump.c
-Copyright © 2009 William Astle
-
-This file is part of LWLINK
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-
-
-A standalone program to dump an object file in a text form to stdout
-
-*/
-
-#include
-#include
-
-#include "util.h"
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-void read_lwobj16v0(unsigned char *filedata, long filesize);
-
-/*
-The logic of reading the entire file into memory is simple. All the symbol
-names in the file are NUL terminated strings and can be used directly without
-making additional copies.
-*/
-int main(int argc, char **argv)
-{
- int i;
- long size;
- FILE *f;
- long bread;
- unsigned char *filedata;
-
- if (argc != 2)
- {
- fprintf(stderr, "Must specify exactly one input file.\n");
- exit(1);
- }
-
- f = fopen(argv[1], "rb");
- if (!f)
- {
- fprintf(stderr, "Can't open file %s:", argv[1]);
- perror("");
- exit(1);
- }
- fseek(f, 0, SEEK_END);
- size = ftell(f);
- rewind(f);
-
- filedata = lw_malloc(size);
-
- bread = fread(filedata, 1, size, f);
- if (bread < size)
- {
- fprintf(stderr, "Short read on file %s (%ld/%ld):", argv[1], bread, size);
- perror("");
- exit(1);
- }
-
- fclose(f);
-
- if (!memcmp(filedata, "LWOBJ16", 8))
- {
- // read v0 LWOBJ16 file
- read_lwobj16v0(filedata, size);
- }
- else
- {
- fprintf(stderr, "%s: unknown file format\n", argv[1]);
- exit(1);
- }
- exit(0);
-}
-
-// this macro is used to bail out if we run off the end of the file data
-// while parsing - it keeps the code below cleaner
-#define NEXTBYTE() do { cc++; if (cc > filesize) { fprintf(stderr, "***invalid file format\n"); exit(1); } } while (0)
-// this macro is used to refer to the current byte in the stream
-#define CURBYTE() (filedata[cc < filesize ? cc : filesize - 1])
-// this one will leave the input pointer past the trailing NUL
-#define CURSTR() read_lwobj16v0_str(&cc, &filedata, filesize)
-unsigned char *read_lwobj16v0_str(long *cc1, unsigned char **filedata1, long filesize)
-{
- int cc = *cc1;
- unsigned char *filedata = *filedata1;
- unsigned char *fp;
- fp = &CURBYTE();
- while (CURBYTE())
- NEXTBYTE();
- NEXTBYTE();
- *cc1 = cc;
- *filedata1 = filedata;
- return fp;
-}
-// the function below can be switched to dealing with data coming from a
-// source other than an in-memory byte pool by adjusting the input data
-// in "fn" and the above two macros
-void read_lwobj16v0(unsigned char *filedata, long filesize)
-{
- unsigned char *fp;
- long cc;
- int val;
- int bss;
-
- static char *opernames[] = {
- "?",
- "PLUS",
- "MINUS",
- "TIMES",
- "DIVIDE",
- "MOD",
- "INTDIV",
- "BWAND",
- "BWOR",
- "BWXOR",
- "AND",
- "OR",
- "NEG",
- "COM"
- };
- static const int numopers = 13;
-
- // start reading *after* the magic number
- cc = 8;
-
- while (1)
- {
- bss = 0;
-
- // bail out if no more sections
- if (!(CURBYTE()))
- break;
-
- fp = CURSTR();
-
- printf("SECTION %s\n", fp);
-
- // read flags
- while (CURBYTE())
- {
- switch (CURBYTE())
- {
- case 0x01:
- printf(" FLAG: BSS\n");
- bss = 1;
- break;
-
- default:
- printf(" FLAG: %02X (unknown)\n", CURBYTE());
- break;
- }
- NEXTBYTE();
- }
- // skip NUL terminating flags
- NEXTBYTE();
-
- printf(" Local symbols:\n");
- // now parse the local symbol table
- while (CURBYTE())
- {
- fp = CURSTR();
-
- // fp is the symbol name
- val = (CURBYTE()) << 8;
- NEXTBYTE();
- val |= (CURBYTE());
- NEXTBYTE();
- // val is now the symbol value
-
- printf(" %s=%04X\n", fp, val);
-
- }
- // skip terminating NUL
- NEXTBYTE();
-
- printf(" Exported symbols\n");
-
- // now parse the exported symbol table
- while (CURBYTE())
- {
- fp = CURSTR();
-
- // fp is the symbol name
- val = (CURBYTE()) << 8;
- NEXTBYTE();
- val |= (CURBYTE());
- NEXTBYTE();
- // val is now the symbol value
-
- printf(" %s=%04X\n", fp, val);
- }
- // skip terminating NUL
- NEXTBYTE();
-
- // now parse the incomplete references and make a list of
- // external references that need resolution
- printf(" Incomplete references\n");
- while (CURBYTE())
- {
- printf(" (");
- // parse the expression
- while (CURBYTE())
- {
- int tt = CURBYTE();
- NEXTBYTE();
- switch (tt)
- {
- case 0x01:
- // 16 bit integer
- tt = CURBYTE() << 8;
- NEXTBYTE();
- tt |= CURBYTE();
- NEXTBYTE();
- // normalize for negatives...
- if (tt > 0x7fff)
- tt -= 0x10000;
- printf(" I16=%d", tt);
- break;
-
- case 0x02:
- // external symbol reference
- printf(" ES=%s", CURSTR());
- break;
-
- case 0x03:
- // internal symbol reference
- printf(" IS=%s", CURSTR());
- break;
-
- case 0x04:
- // operator
- if (CURBYTE() > 0 && CURBYTE() <= numopers)
- printf(" OP=%s", opernames[CURBYTE()]);
- else
- printf(" OP=?");
- NEXTBYTE();
- break;
-
- case 0x05:
- // section base reference (NULL internal reference is
- // the section base address
- printf(" SB");
- break;
-
- default:
- printf(" ERR");
- }
- }
- // skip the NUL
- NEXTBYTE();
-
- // fetch the offset
- val = CURBYTE() << 8;
- NEXTBYTE();
- val |= CURBYTE() & 0xff;
- NEXTBYTE();
- printf(" ) @ %04X\n", val);
- }
- // skip the NUL terminating the relocations
- NEXTBYTE();
-
- // now set code location and size and verify that the file
- // contains data going to the end of the code (if !SECTION_BSS)
- val = CURBYTE() << 8;
- NEXTBYTE();
- val |= CURBYTE();
- NEXTBYTE();
-
- printf(" CODE %04X bytes", val);
-
- // skip the code if we're not in a BSS section
- if (!bss)
- {
- int i;
- for (i = 0; i < val; i++)
- {
- if (! (i % 16))
- {
- printf("\n %04X ", i);
- }
- printf("%02X", CURBYTE());
- NEXTBYTE();
- }
- }
- printf("\n");
- }
-}
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/output.c
--- a/lwlink/trunk/src/output.c Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,127 +0,0 @@
-/*
-output.c
-Copyright © 2009 William Astle
-
-This file is part of LWLINK.
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-
-
-Actually output the binary
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include
-#include
-
-#include "lwlink.h"
-
-// this prevents warnings about not using the return value of fwrite()
-// and, theoretically, can be replaced with a function that handles things
-// better in the future
-#define writebytes(s, l, c, f) do { int r; r = fwrite((s), (l), (c), (f)); } while (0)
-
-void do_output_decb(FILE *of);
-void do_output_raw(FILE *of);
-
-void do_output(void)
-{
- FILE *of;
-
- of = fopen(outfile, "wb");
- if (!of)
- {
- fprintf(stderr, "Cannot open output file %s: ", outfile);
- perror("");
- exit(1);
- }
-
- switch (outformat)
- {
- case OUTPUT_DECB:
- do_output_decb(of);
- break;
-
- case OUTPUT_RAW:
- do_output_raw(of);
- break;
-
- default:
- fprintf(stderr, "Unknown output format doing output!\n");
- exit(111);
- }
-
- fclose(of);
-}
-
-void do_output_decb(FILE *of)
-{
- int sn;
- unsigned char buf[5];
-
- for (sn = 0; sn < nsects; sn++)
- {
- if (sectlist[sn].ptr -> flags & SECTION_BSS)
- {
- // no output for a BSS section
- continue;
- }
- if (sectlist[sn].ptr -> codesize == 0)
- {
- // don't generate output for a zero size section
- continue;
- }
- // write a preamble
- buf[0] = 0x00;
- buf[1] = sectlist[sn].ptr -> codesize >> 8;
- buf[2] = sectlist[sn].ptr -> codesize & 0xff;
- buf[3] = sectlist[sn].ptr -> loadaddress >> 8;
- buf[4] = sectlist[sn].ptr -> loadaddress & 0xff;
- writebytes(buf, 1, 5, of);
- writebytes(sectlist[sn].ptr -> code, 1, sectlist[sn].ptr -> codesize, of);
- }
- // write a postamble
- buf[0] = 0xff;
- buf[1] = 0x00;
- buf[2] = 0x00;
- buf[3] = linkscript.execaddr >> 8;
- buf[4] = linkscript.execaddr & 0xff;
- writebytes(buf, 1, 5, of);
-}
-
-void do_output_raw(FILE *of)
-{
- int nskips = 0; // used to output blanks for BSS inline
- int sn;
-
- for (sn = 0; sn < nsects; sn++)
- {
- if (sectlist[sn].ptr -> flags & SECTION_BSS)
- {
- // no output for a BSS section
- nskips += sectlist[sn].ptr -> codesize;
- continue;
- }
- while (nskips > 0)
- {
- // the "" is not an error - it turns into a single NUL byte!
- writebytes("", 1, 1, of);
- nskips--;
- }
- writebytes(sectlist[sn].ptr -> code, 1, sectlist[sn].ptr -> codesize, of);
- }
-}
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/readfiles.c
--- a/lwlink/trunk/src/readfiles.c Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,304 +0,0 @@
-/*
-readfiles.c
-Copyright © 2009 William Astle
-
-This file is part of LWLINK.
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-
-
-Reads input files
-
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include
-#include
-#include
-#include
-
-#include "lwlink.h"
-#include "util.h"
-
-void read_lwobj16v0(fileinfo_t *fn);
-
-/*
-The logic of reading the entire file into memory is simple. All the symbol
-names in the file are NUL terminated strings and can be used directly without
-making additional copies.
-*/
-void read_files(void)
-{
- int i;
- long size;
- FILE *f;
- long bread;
- for (i = 0; i < ninputfiles; i++)
- {
- f = fopen(inputfiles[i] -> filename, "rb");
- if (!f)
- {
- fprintf(stderr, "Can't open file %s:", inputfiles[i] -> filename);
- perror("");
- exit(1);
- }
- fseek(f, 0, SEEK_END);
- size = ftell(f);
- rewind(f);
-
- inputfiles[i] -> filedata = lw_malloc(size);
- inputfiles[i] -> filesize = size;
-
- bread = fread(inputfiles[i] -> filedata, 1, size, f);
- if (bread < size)
- {
- fprintf(stderr, "Short read on file %s (%ld/%ld):", inputfiles[i] -> filename, bread, size);
- perror("");
- exit(1);
- }
-
- fclose(f);
-
- if (!memcmp(inputfiles[i] -> filedata, "LWOBJ16", 8))
- {
- // read v0 LWOBJ16 file
- read_lwobj16v0(inputfiles[i]);
- }
- else
- {
- fprintf(stderr, "%s: unknown file format\n", inputfiles[i] -> filename);
- exit(1);
- }
- }
-}
-
-// this macro is used to bail out if we run off the end of the file data
-// while parsing - it keeps the code below cleaner
-#define NEXTBYTE() do { cc++; if (cc > fn -> filesize) { fprintf(stderr, "%s: invalid file format\n", fn -> filename); exit(1); } } while (0)
-// this macro is used to refer to the current byte in the stream
-#define CURBYTE() (fn -> filedata[cc < fn -> filesize ? cc : fn -> filesize - 1])
-// this one will leave the input pointer past the trailing NUL
-#define CURSTR() read_lwobj16v0_str(&cc, fn)
-unsigned char *read_lwobj16v0_str(long *cc1, fileinfo_t *fn)
-{
- int cc = *cc1;
- unsigned char *fp;
- fp = &CURBYTE();
- while (CURBYTE())
- NEXTBYTE();
- NEXTBYTE();
- *cc1 = cc;
- return fp;
-}
-// the function below can be switched to dealing with data coming from a
-// source other than an in-memory byte pool by adjusting the input data
-// in "fn" and the above two macros
-void read_lwobj16v0(fileinfo_t *fn)
-{
- unsigned char *fp;
- long cc;
- section_t *s;
- int val;
- symtab_t *se;
-
- // start reading *after* the magic number
- cc = 8;
-
- // init data
- fn -> sections = NULL;
- fn -> nsections = 0;
-
- while (1)
- {
-// NEXTBYTE();
- // bail out if no more sections
- if (!(CURBYTE()))
- break;
-
- fp = CURSTR();
-
- // we now have a section name in fp
- // create new section entry
- fn -> sections = lw_realloc(fn -> sections, sizeof(section_t) * (fn -> nsections + 1));
- s = &(fn -> sections[fn -> nsections]);
- fn -> nsections += 1;
-
- s -> localsyms = NULL;
- s -> flags = 0;
- s -> codesize = 0;
- s -> name = fp;
- s -> loadaddress = 0;
- s -> localsyms = NULL;
- s -> exportedsyms = NULL;
- s -> incompletes = NULL;
- s -> processed = 0;
- s -> file = fn;
-
- // read flags
- while (CURBYTE())
- {
- switch (CURBYTE())
- {
- case 0x01:
- s -> flags |= SECTION_BSS;
- break;
-
- default:
- fprintf(stderr, "%s (%s): unrecognized section flag %02X\n", fn -> filename, s -> name, (int)(CURBYTE()));
- exit(1);
- }
- NEXTBYTE();
- }
- // skip NUL terminating flags
- NEXTBYTE();
-
- // now parse the local symbol table
- while (CURBYTE())
- {
- fp = CURSTR();
-
- // fp is the symbol name
- val = (CURBYTE()) << 8;
- NEXTBYTE();
- val |= (CURBYTE());
- NEXTBYTE();
- // val is now the symbol value
-
- // create symbol table entry
- se = lw_malloc(sizeof(symtab_t));
- se -> next = s -> localsyms;
- s -> localsyms = se;
- se -> sym = fp;
- se -> offset = val;
- }
- // skip terminating NUL
- NEXTBYTE();
-
- // now parse the exported symbol table
- while (CURBYTE())
- {
- fp = CURSTR();
-
- // fp is the symbol name
- val = (CURBYTE()) << 8;
- NEXTBYTE();
- val |= (CURBYTE());
- NEXTBYTE();
- // val is now the symbol value
-
- // create symbol table entry
- se = lw_malloc(sizeof(symtab_t));
- se -> next = s -> exportedsyms;
- s -> exportedsyms = se;
- se -> sym = fp;
- se -> offset = val;
- }
- // skip terminating NUL
- NEXTBYTE();
-
- // now parse the incomplete references and make a list of
- // external references that need resolution
- while (CURBYTE())
- {
- reloc_t *rp;
- lw_expr_term_t *term;
-
- // we have a reference
- rp = lw_malloc(sizeof(reloc_t));
- rp -> next = s -> incompletes;
- s -> incompletes = rp;
- rp -> offset = 0;
- rp -> expr = lw_expr_stack_create();
-
- // parse the expression
- while (CURBYTE())
- {
- int tt = CURBYTE();
- NEXTBYTE();
- switch (tt)
- {
- case 0x01:
- // 16 bit integer
- tt = CURBYTE() << 8;
- NEXTBYTE();
- tt |= CURBYTE();
- NEXTBYTE();
- // normalize for negatives...
- if (tt > 0x7fff)
- tt -= 0x10000;
- term = lw_expr_term_create_int(tt);
- break;
-
- case 0x02:
- // external symbol reference
- term = lw_expr_term_create_sym(CURSTR(), 0);
- break;
-
- case 0x03:
- // internal symbol reference
- term = lw_expr_term_create_sym(CURSTR(), 1);
- break;
-
- case 0x04:
- // operator
- term = lw_expr_term_create_oper(CURBYTE());
- NEXTBYTE();
- break;
-
- case 0x05:
- // section base reference (NULL internal reference is
- // the section base address
- term = lw_expr_term_create_sym(NULL, 1);
- break;
-
- default:
- fprintf(stderr, "%s (%s): bad relocation expression\n", fn -> filename, s -> name);
- exit(1);
- }
- lw_expr_stack_push(rp -> expr, term);
- lw_expr_term_free(term);
- }
- // skip the NUL
- NEXTBYTE();
-
- // fetch the offset
- rp -> offset = CURBYTE() << 8;
- NEXTBYTE();
- rp -> offset |= CURBYTE() & 0xff;
- NEXTBYTE();
- }
- // skip the NUL terminating the relocations
- NEXTBYTE();
-
- // now set code location and size and verify that the file
- // contains data going to the end of the code (if !SECTION_BSS)
- s -> codesize = CURBYTE() << 8;
- NEXTBYTE();
- s -> codesize |= CURBYTE();
- NEXTBYTE();
-
- s -> code = &(CURBYTE());
-
- // skip the code if we're not in a BSS section
- if (!(s -> flags & SECTION_BSS))
- {
- int i;
- for (i = 0; i < s -> codesize; i++)
- NEXTBYTE();
- }
- }
-}
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/script.c
--- a/lwlink/trunk/src/script.c Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,257 +0,0 @@
-/*
-script.c
-Copyright © 2009 William Astle
-
-This file is part of LWLINK.
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-
-
-Read and parse linker scripts
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include
-#include
-#include
-#include
-
-#include "lwlink.h"
-#include "util.h"
-
-// the built-in DECB target linker script
-static char *decb_script =
- "section init load 2000\n"
- "section code\n"
- "section *,!bss\n"
- "section *,bss\n"
- "entry 2000\n"
- ;
-
-// the built-in RAW target linker script
-static char *raw_script =
- "section init load 0000\n"
- "section code\n"
- "section *,!bss\n"
- "section *,bss\n"
- ;
-
-// the "simple" script
-static char *simple_script =
- "section *,!bss\n"
- "section *,bss\n"
- ;
-
-linkscript_t linkscript = { 0, NULL, -1 };
-
-void setup_script()
-{
- char *script, *oscript;
- long size;
-
- // read the file if needed
- if (scriptfile)
- {
- FILE *f;
- long bread;
-
- f = fopen(scriptfile, "rb");
- if (!f)
- {
- fprintf(stderr, "Can't open file %s:", scriptfile);
- perror("");
- exit(1);
- }
- fseek(f, 0, SEEK_END);
- size = ftell(f);
- rewind(f);
-
- script = lw_malloc(size + 2);
-
- bread = fread(script, 1, size, f);
- if (bread < size)
- {
- fprintf(stderr, "Short read on file %s (%ld/%ld):", scriptfile, bread, size);
- perror("");
- exit(1);
- }
- fclose(f);
-
- script[size] = '\n';
- script[size + 1] = '\0';
- }
- else
- {
- // fetch defaults based on output mode
- switch (outformat)
- {
- case OUTPUT_RAW:
- script = raw_script;
- break;
-
- case OUTPUT_DECB:
- script = decb_script;
- break;
-
- default:
- script = simple_script;
- break;
- }
-
- size = strlen(script);
- }
-
- oscript = script;
- // now parse the script file
- while (*script)
- {
- char *ptr, *ptr2, *line;
-
- for (ptr = script; *ptr && *ptr != '\n' && *ptr != '\r'; ptr++)
- /* do nothing */ ;
-
- line = lw_malloc(ptr - script + 1);
- memcpy(line, script, ptr - script);
- line[ptr - script] = '\0';
-
- // skip line terms
- for (script = ptr + 1; *script == '\n' || *script == '\r'; script++)
- /* do nothing */ ;
-
- // ignore leading whitespace
- for (ptr = line; *ptr && isspace(*ptr); ptr++)
- /* do nothing */ ;
-
- // ignore blank lines
- if (!*ptr)
- continue;
-
- for (ptr = line; *ptr && !isspace(*ptr); ptr++)
- /* do nothing */ ;
-
- // now ptr points to the char past the first word
- // NUL it out
- if (*ptr)
- *ptr++ = '\0';
-
- // skip spaces after the first word
- for ( ; *ptr && isspace(*ptr); ptr++)
- /* do nothing */ ;
-
- if (!strcmp(line, "pad"))
- {
- // padding
- // parse the hex number and stow it
- linkscript.padsize = strtol(ptr, NULL, 16);
- if (linkscript.padsize < 0)
- linkscript.padsize = 0;
- }
- else if (!strcmp(line, "entry"))
- {
- int eaddr;
-
- eaddr = strtol(ptr, &ptr2, 16);
- if (*ptr2)
- {
- linkscript.execaddr = -1;
- linkscript.execsym = lw_strdup(ptr);
- }
- else
- {
- linkscript.execaddr = eaddr;
- linkscript.execsym = NULL;
- }
- }
- else if (!strcmp(line, "section"))
- {
- // section
- // parse out the section name and flags
- for (ptr2 = ptr; *ptr2 && !isspace(*ptr2); ptr2++)
- /* do nothing */ ;
-
- if (*ptr2)
- *ptr2++ = '\0';
-
- while (*ptr2 && isspace(*ptr2))
- ptr2++;
-
- // ptr now points to the section name and flags and ptr2
- // to the first non-space character following
-
- // then look for "load " clause
- if (*ptr2)
- {
- if (!strncmp(ptr2, "load", 4))
- {
- ptr2 += 4;
- while (*ptr2 && isspace(*ptr2))
- ptr2++;
-
- }
- else
- {
- fprintf(stderr, "%s: bad script\n", scriptfile);
- exit(1);
- }
- }
-
- // now ptr2 points to the load address if there is one
- // or NUL if not
- linkscript.lines = lw_realloc(linkscript.lines, sizeof(struct scriptline_s) * (linkscript.nlines + 1));
-
- linkscript.lines[linkscript.nlines].noflags = 0;
- linkscript.lines[linkscript.nlines].yesflags = 0;
- if (*ptr2)
- linkscript.lines[linkscript.nlines].loadat = strtol(ptr2, NULL, 16);
- else
- linkscript.lines[linkscript.nlines].loadat = -1;
- for (ptr2 = ptr; *ptr2 && *ptr2 != ','; ptr2++)
- /* do nothing */ ;
- if (*ptr2)
- {
- *ptr2++ = '\0';
- if (!strcmp(ptr2, "!bss"))
- {
- linkscript.lines[linkscript.nlines].noflags = SECTION_BSS;
- }
- else if (!strcmp(ptr2, "bss"))
- {
- linkscript.lines[linkscript.nlines].yesflags = SECTION_BSS;
- }
- else
- {
- fprintf(stderr, "%s: bad script\n", scriptfile);
- exit(1);
- }
- }
- if (ptr[0] == '*' && ptr[1] == '\0')
- linkscript.lines[linkscript.nlines].sectname = NULL;
- else
- linkscript.lines[linkscript.nlines].sectname = lw_strdup(ptr);
- linkscript.nlines++;
- }
- else
- {
- fprintf(stderr, "%s: bad script\n", scriptfile);
- exit(1);
- }
- lw_free(line);
- }
-
- if (scriptfile)
- lw_free(oscript);
-}
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/util.c
--- a/lwlink/trunk/src/util.c Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,87 +0,0 @@
-/*
-util.c
-Copyright © 2009 William Astle
-
-This file is part of LWLINK.
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-*/
-
-/*
-Utility functions
-*/
-
-#define __util_c_seen__
-
-#include
-#include
-#include
-#include
-
-#include "util.h"
-
-void *lw_malloc(int size)
-{
- void *ptr;
-
- ptr = malloc(size);
- if (!ptr)
- {
- // bail out; memory allocation error
- fprintf(stderr, "lw_malloc(): Memory allocation error\n");
- exit(1);
- }
- return ptr;
-}
-
-void *lw_realloc(void *optr, int size)
-{
- void *ptr;
-
- if (size == 0)
- {
- lw_free(optr);
- return;
- }
-
- ptr = realloc(optr, size);
- if (!ptr)
- {
- fprintf(stderr, "lw_realloc(): memory allocation error\n");
- exit(1);
- }
-}
-
-void lw_free(void *ptr)
-{
- if (ptr)
- free(ptr);
-}
-
-char *lw_strdup(const char *s)
-{
- char *d;
-
- if (!s)
- return NULL;
-
- d = strdup(s);
- if (!d)
- {
- fprintf(stderr, "lw_strdup(): memory allocation error\n");
- exit(1);
- }
-
- return d;
-}
diff -r 8e69528eef91 -r 050864a47b38 lwlink/trunk/src/util.h
--- a/lwlink/trunk/src/util.h Wed Jan 28 05:54:43 2009 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,44 +0,0 @@
-/*
-util.h
-Copyright © 2009 William Astle
-
-This file is part of LWLINK.
-
-LWLINK is free software: you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation, either version 3 of the License, or (at your option) any later
-version.
-
-This program is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see .
-*/
-
-/*
-Utility functions
-*/
-
-#ifndef __util_h_seen__
-#define __util_h_seen__
-
-#ifndef __util_c_seen__
-#define __util_E__ extern
-#else
-#define __util_E__
-#endif
-
-// allocate memory
-__util_E__ void *lw_malloc(int size);
-__util_E__ void lw_free(void *ptr);
-__util_E__ void *lw_realloc(void *optr, int size);
-
-// string stuff
-__util_E__ char *lw_strdup(const char *s);
-
-#undef __util_E__
-
-#endif // __util_h_seen__