LWTools Old Repo: src/symbol.c annotate

annotate src/symbol.c @ 143:0ee5f65bccf9

Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option

author	lost
date	Thu, 29 Jan 2009 01:32:11 +0000
parents	ea2cfebef5d0
children

rev	line source
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	1 /*
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	2 symbol.c
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	3 Copyright © 2009 William Astle
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	4
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	5 This file is part of LWASM.
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	6
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	7 LWASM is free software: you can redistribute it and/or modify it under the
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	8 terms of the GNU General Public License as published by the Free Software
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	9 Foundation, either version 3 of the License, or (at your option) any later
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	10 version.
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	11
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	12 This program is distributed in the hope that it will be useful, but WITHOUT
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	15 more details.
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	16
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	17 You should have received a copy of the GNU General Public License along with
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	18 this program. If not, see <http://www.gnu.org/licenses/>.
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	19 */
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	20
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	21 /*
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	22 for handling the symbol table
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	23 */
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	24
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	25 #define __symbol_c_seen__
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	26
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	27 #include <string.h>
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	28
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	29 #include "lwasm.h"
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	30 #include "util.h"
75 92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	31 #include "expr.h"
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	32
40 d2cee0c335e7 adjusted symbol rules to accept symbols starting with @ but not @<digit> lost parents: 37 diff changeset	33 /*
d2cee0c335e7 adjusted symbol rules to accept symbols starting with @ but not @<digit> lost parents: 37 diff changeset	34 Note that this function may accept symbols that the expression evaluator doesn't
d2cee0c335e7 adjusted symbol rules to accept symbols starting with @ but not @<digit> lost parents: 37 diff changeset	35 recognize because the expression evaluator must avoid all ambiguity in order
d2cee0c335e7 adjusted symbol rules to accept symbols starting with @ but not @<digit> lost parents: 37 diff changeset	36 to achieve predictable results. The checks here are simply a fuzz check.
d2cee0c335e7 adjusted symbol rules to accept symbols starting with @ but not @<digit> lost parents: 37 diff changeset	37 */
77 a338d496350e Checkpointing conversion to allow object target lost parents: 75 diff changeset	38
a338d496350e Checkpointing conversion to allow object target lost parents: 75 diff changeset	39 /*
a338d496350e Checkpointing conversion to allow object target lost parents: 75 diff changeset	40 NOTE: complex symbols always take their value from slot 0 on the expression placeholders
a338d496350e Checkpointing conversion to allow object target lost parents: 75 diff changeset	41 for a line!
a338d496350e Checkpointing conversion to allow object target lost parents: 75 diff changeset	42 */
64 aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	43 int lwasm_register_symbol(asmstate_t as, lwasm_line_t l, char *sym, int val, int flags)
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	44 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	45 lwasm_symbol_ent_t se, se2;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	46 char *p;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	47
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	48 int scontext = -1;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	49
75 92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	50 // if the symbol is constant, fall back to simple registration!
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	51 if (flags & SYMBOL_COMPLEX)
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	52 {
77 a338d496350e Checkpointing conversion to allow object target lost parents: 75 diff changeset	53 if (l -> exprs[0] == NULL)
75 92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	54 {
77 a338d496350e Checkpointing conversion to allow object target lost parents: 75 diff changeset	55 val = l -> exprvals[0];
75 92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	56 flags &= ~SYMBOL_COMPLEX;
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	57 }
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	58 }
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	59
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	60 // first check if the symbol is valid
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	61 // the following characters are allowed in a symbol:
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	62 // [a-zA-Z0-9._$?@] and any byte value larger than 0x7F
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	63 // although symbols should be restricted to the 7 bit range
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	64 // symbols must start with [a-zA-Z._]
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	65 if (!strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz._@?", *sym))
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	66 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	67 register_error(as, l, 1, "Bad symbol: %s", sym);
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	68 return -1;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	69 }
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	70
40 d2cee0c335e7 adjusted symbol rules to accept symbols starting with @ but not @<digit> lost parents: 37 diff changeset	71 if (*sym == '@' && isdigit(sym[1]))
d2cee0c335e7 adjusted symbol rules to accept symbols starting with @ but not @<digit> lost parents: 37 diff changeset	72 {
d2cee0c335e7 adjusted symbol rules to accept symbols starting with @ but not @<digit> lost parents: 37 diff changeset	73 register_error(as, l, 1, "Bad symbol: %s", sym);
d2cee0c335e7 adjusted symbol rules to accept symbols starting with @ but not @<digit> lost parents: 37 diff changeset	74 return -1;
d2cee0c335e7 adjusted symbol rules to accept symbols starting with @ but not @<digit> lost parents: 37 diff changeset	75 }
d2cee0c335e7 adjusted symbol rules to accept symbols starting with @ but not @<digit> lost parents: 37 diff changeset	76
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	77 for (p = sym; *p; p++)
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	78 {
52 b9856da2674a Added file inclusion lost parents: 40 diff changeset	79 if (!strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz._$?@0123456789", *sym))
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	80 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	81 register_error(as, l, 1, "Bad symbol: %s", sym);
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	82 return -1;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	83 }
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	84 // flag local symbols while we're at it...
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	85 if (p == '?' \|\| p == '@')
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	86 scontext = as -> context;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	87 }
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	88
64 aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	89 debug_message(3, "lwasm_register_symbol(): registering '%s' (%d) at %04X; flags=%d", sym, scontext, val, flags);
58 b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	90
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	91 // now look it for to see if it is a duplicate
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	92 se = lwasm_find_symbol(as, sym, scontext);
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	93 if (se)
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	94 {
79 d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	95 if (flags & SYMBOL_FORCE && as -> passnum != 2)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	96 {
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	97 register_error(as, l, 1, "Multiply defined symbol: %s", sym);
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	98 return -1;
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	99 }
64 aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	100 if (!(flags & SYMBOL_SET) \|\| (flags & SYMBOL_SET && !(se -> flags & SYMBOL_SET)))
aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	101 {
aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	102 register_error(as, l, 1, "Mulitply defined symbol: %s", sym);
aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	103 return -1;
aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	104 }
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	105 }
64 aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	106 if (se)
aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	107 {
aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	108 se -> value = val;
75 92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	109 if (flags & SYMBOL_COMPLEX)
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	110 {
77 a338d496350e Checkpointing conversion to allow object target lost parents: 75 diff changeset	111 se -> expr = l -> exprs[0];
75 92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	112 }
79 d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	113 else
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	114 {
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	115 se -> expr = NULL;
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	116 }
64 aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	117 return;
aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	118 }
aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	119
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	120 // if not a duplicate, register it with the value
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	121 se = lwasm_alloc(sizeof(lwasm_symbol_ent_t));
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	122 if (as -> symhead)
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	123 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	124 se -> prev = NULL;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	125 se -> next = as -> symhead;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	126 as -> symhead -> prev = se;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	127 as -> symhead = se;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	128 }
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	129 else
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	130 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	131 se -> next = NULL;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	132 se -> prev = NULL;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	133 as -> symhead = se;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	134 as -> symtail = se;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	135 }
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	136 se -> value = val;
75 92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	137 if (flags & SYMBOL_COMPLEX)
77 a338d496350e Checkpointing conversion to allow object target lost parents: 75 diff changeset	138 se -> expr = l -> exprs[0];
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	139 se -> sym = lwasm_strdup(sym);
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	140 se -> context = scontext;
143 0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	141
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	142 if (!(flags & SYMBOL_EXTERN))
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	143 se -> sect = as -> csect;
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	144 else
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	145 se -> sect = NULL;
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	146
75 92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	147 se -> expr = NULL;
64 aaddd47219b4 Added the 'set' directive lost parents: 63 diff changeset	148 se -> flags = flags;
82 03be43ae19cf Added EXTERN directive lost parents: 79 diff changeset	149 se -> externalname = NULL;
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	150
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	151 return 0;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	152 }
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	153
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	154 lwasm_symbol_ent_t lwasm_find_symbol(asmstate_t as, char *sym, int scontext)
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	155 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	156 lwasm_symbol_ent_t *se;
143 0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	157 static int st = 0;
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	158
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	159 for (se = as -> symhead; se; se = se -> next)
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	160 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	161 if (scontext == se -> context && !strcmp(sym, se -> sym))
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	162 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	163 return se;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	164 }
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	165 }
143 0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	166 if (as -> passnum == 2 && st == 0 && scontext == -1 && as -> outformat == OUTPUT_OBJ && as -> pragmas & PRAGMA_UNDEFEXTERN)
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	167 {
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	168 // we want undefined symbols to be considered external
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	169 // we didn't find it on a lookup so register it as external
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	170 // but we only do so when looking up in global context
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	171 st = 1;
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	172 if (lwasm_register_symbol(as, NULL, sym, 0, SYMBOL_EXTERN))
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	173 {
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	174 st = 0;
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	175 return NULL;
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	176 }
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	177 st = 0;
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	178
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	179 // find the newly registered symbol and return it
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	180 for (se = as -> symhead; se; se = se -> next)
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	181 {
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	182 if (scontext == se -> context && !strcmp(sym, se -> sym))
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	183 {
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	184 return se;
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	185 }
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	186 }
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	187 }
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 92 diff changeset	188
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	189 return NULL;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	190 }
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	191
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	192 // reset the value of a symbol - should not be used normally
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	193 // it is intended for use by such operations as EQU
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	194 // returns -1 if the symbol is not registered
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	195 int lwasm_set_symbol(asmstate_t as, char sym, int scontext, int val)
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	196 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	197 lwasm_symbol_ent_t *se;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	198
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	199 se = lwasm_find_symbol(as, sym, scontext);
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	200 if (!se)
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	201 return -1;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	202
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	203 se -> value = val;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	204 return 0;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: diff changeset	205 }
58 b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	206
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	207 void lwasm_list_symbols(asmstate_t as, FILE lf)
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	208 {
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	209 lwasm_symbol_ent_t *se;
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	210
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	211 for (se = as -> symhead; se; se = se -> next)
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	212 {
75 92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	213 if (se -> expr)
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	214 {
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	215 fprintf(lf, "<incompl>");
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	216 }
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	217 else if (se -> value > 0xffff \|\| se -> value < -0x8000)
58 b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	218 {
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	219 fprintf(lf, "%08X ", se -> value);
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	220 }
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	221 else
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	222 {
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	223 fprintf(lf, " %04X ", se -> value);
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	224 }
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	225 if (se -> context < 0)
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	226 fputc('G', lf);
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	227 else
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	228 fputc('L', lf);
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	229
63 d85ba47b1e8f Moved symbol registration so symbols that are in skipped code do not get registered and so EQU/SET can do their own registration lost parents: 58 diff changeset	230 if (se -> flags & SYMBOL_SET)
d85ba47b1e8f Moved symbol registration so symbols that are in skipped code do not get registered and so EQU/SET can do their own registration lost parents: 58 diff changeset	231 fputc('S', lf);
92 ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list lost parents: 82 diff changeset	232 else if (se -> flags & SYMBOL_EXTERN)
ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list lost parents: 82 diff changeset	233 fputc('E', lf);
63 d85ba47b1e8f Moved symbol registration so symbols that are in skipped code do not get registered and so EQU/SET can do their own registration lost parents: 58 diff changeset	234 else
d85ba47b1e8f Moved symbol registration so symbols that are in skipped code do not get registered and so EQU/SET can do their own registration lost parents: 58 diff changeset	235 fputc(' ', lf);
d85ba47b1e8f Moved symbol registration so symbols that are in skipped code do not get registered and so EQU/SET can do their own registration lost parents: 58 diff changeset	236
58 b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	237 fprintf(lf, " %s", se -> sym);
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	238
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	239 if (se -> context >= 0)
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	240 fprintf(lf, " (%d)", se -> context);
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	241
75 92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	242 if (se -> sect)
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	243 {
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	244 fprintf(lf, " [%s]", se -> sect -> name);
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	245 }
92eb93bffa28 Rejigged symbol system to be able to handle non-constant references lost parents: 64 diff changeset	246
58 b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	247 fputc('\n', lf);
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	248 }
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 52 diff changeset	249 }

Mercurial > hg-old > index.cgi

annotate src/symbol.c @ 143:0ee5f65bccf9