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view lwasm/pseudo.c @ 333:507f442dc71e
Add support for 6800 compatibility instructions.
The occasional program uses the 6800 compatibility instructions since they
are actually specified by Motorola in at least some documentation. They
advertised the 6809 as source compatible with the 6800.
This mode is not enabled by default, however. It is my belief that receiving
an error when using a non-6809 instruction is more useful since it is
unlikely that much 6800 source code is being assembled for the 6809 these
days. Nevertheless, the --6809compat option is present for just those
purposes so one does not have to resort to using macros (which would work
equally well in most cases).
author | William Astle <lost@l-w.ca> |
---|---|
date | Tue, 15 Apr 2014 10:57:34 -0600 |
parents | cb24ffb23f7c |
children | b62af915c2cc |
line wrap: on
line source
/* pseudo.c Copyright © 2010 William Astle This file is part of LWASM. LWASM 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 <http://www.gnu.org/licenses/>. */ #include <stdio.h> #include <ctype.h> #include <string.h> #include <stdlib.h> #include <time.h> #include <lw_alloc.h> #include "lwasm.h" #include "instab.h" #include "input.h" #include "lw_string.h" extern void register_struct_entry(asmstate_t *as, line_t *l, int size, structtab_t *ss); // for "dts" PARSEFUNC(pseudo_parse_dts) { time_t tp; char *t; skip_operand(p); l -> len = 0; tp = time(NULL); t = l ->lstr = lw_strdup(ctime(&tp)); while (*t) { if (*t == '\n') break; t++; l -> len += 1; } } EMITFUNC(pseudo_emit_dts) { char *t; int i; for (t = l -> lstr, i = 0; i < l -> len; i++, t++) lwasm_emit(l, *t); } // for "dtb" PARSEFUNC(pseudo_parse_dtb) { skip_operand(p); l -> len = 6; } EMITFUNC(pseudo_emit_dtb) { time_t tp; struct tm *t; tp = time(NULL); t = localtime(&tp); lwasm_emit(l, t -> tm_year); lwasm_emit(l, t -> tm_mon + 1); lwasm_emit(l, t -> tm_mday); lwasm_emit(l, t -> tm_hour); lwasm_emit(l, t -> tm_min); lwasm_emit(l, t -> tm_sec); } // for "end" PARSEFUNC(pseudo_parse_end) { lw_expr_t addr; as -> endseen = 1; l -> len = 0; if (as -> output_format != OUTPUT_DECB) { skip_operand(p); return; } if (!**p) { addr = lw_expr_build(lw_expr_type_int, 0); } else { addr = lwasm_parse_expr(as, p); } if (!addr) { lwasm_register_error(as, l, "Bad expression"); addr = lw_expr_build(lw_expr_type_int, 0); } lwasm_save_expr(l, 0, addr); } EMITFUNC(pseudo_emit_end) { lw_expr_t addr; addr = lwasm_fetch_expr(l, 0); if (addr) { if (!lw_expr_istype(addr, lw_expr_type_int)) lwasm_register_error(as, l, "Exec address not constant!"); else as -> execaddr = lw_expr_intval(addr); } as -> endseen = 1; } PARSEFUNC(pseudo_parse_fcb) { int i = 0; lw_expr_t e; for (;;) { e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, "Bad expression (#%d)", i); break; } lwasm_save_expr(l, i++, e); if (**p != ',') break; (*p)++; } l -> len = i; } EMITFUNC(pseudo_emit_fcb) { int i; lw_expr_t e; // int v; for (i = 0; i < l -> len; i++) { e = lwasm_fetch_expr(l, i); lwasm_emitexpr(l, e, 1); } } PARSEFUNC(pseudo_parse_fdb) { int i = 0; lw_expr_t e; for (;;) { e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, "Bad expression (#%d)", i); break; } lwasm_save_expr(l, i++, e); if (**p != ',') break; (*p)++; } l -> len = i * 2; } EMITFUNC(pseudo_emit_fdb) { int i; lw_expr_t e; // int v; for (i = 0; i < (l -> len)/2; i++) { e = lwasm_fetch_expr(l, i); lwasm_emitexpr(l, e, 2); } } PARSEFUNC(pseudo_parse_fdbs) { int i = 0; lw_expr_t e; for (;;) { e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, "Bad expression (#%d)", i); break; } lwasm_save_expr(l, i++, e); if (**p != ',') break; (*p)++; } l -> len = i * 2; } EMITFUNC(pseudo_emit_fdbs) { int i; lw_expr_t e; lw_expr_t t; lw_expr_t t2; // int v; for (i = 0; i < (l -> len)/2; i++) { e = lwasm_fetch_expr(l, i); t = lw_expr_build(lw_expr_type_int, 256); t2 = lw_expr_build(lw_expr_type_oper, lw_expr_oper_divide, e, t); lwasm_reduce_expr(as, t2); lw_expr_destroy(t); lwasm_emitexpr(l, e, 1); lwasm_emitexpr(l, t2, 1); lw_expr_destroy(t2); } } PARSEFUNC(pseudo_parse_fqb) { int i = 0; lw_expr_t e; for (;;) { e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, "Bad expression (#%d)", i); break; } lwasm_save_expr(l, i++, e); if (**p != ',') break; (*p)++; } l -> len = i * 4; } EMITFUNC(pseudo_emit_fqb) { int i; lw_expr_t e; // int v; for (i = 0; i < (l -> len)/4; i++) { e = lwasm_fetch_expr(l, i); lwasm_emitexpr(l, e, 4); } } static int cstringlen(asmstate_t *as, line_t *ln, char **p, char delim) { int l = 0; char *str = NULL; int blen = 0; int bsize = 0; if (!(as -> pragmas & PRAGMA_CESCAPES)) { for (; **p && **p != delim; (*p)++) { l++; if (blen >= bsize) { str = lw_realloc(str, bsize + 32); bsize++; } str[blen++] = **p; } } else { while (**p && **p != delim) { int wch = **p; if (**p == '\\') { /* escape sequence */ (*p)++; if (!**p) break; switch (**p) { /* octal sequence or NUL */ /* skip the "0", then skip up to two more digits */ case '0': case '1': case '2': case '3': wch = **p; wch -= 0x30; if ((*p)[1] >= '0' && (*p)[1] < '8') { (*p)++; wch *= 8; wch += **p - 0x30; } if ((*p)[1] >= '0' && (*p)[1] < '8') { (*p)++; wch *= 8; wch += **p -0x30; } break; /* hexadecimal value */ case 'x': (*p)++; // ignore "x" wch = 0; if (**p) // skip digit 1 { wch = **p - 0x30; if (wch > 9) wch -= 7; if (wch > 9) wch -= 32; (*p)++; } if (**p) { int i; i = **p - 0x30; if (i > 9) i -= 7; if (i > 9) i -= 32; wch = wch * 16 + i; } break; case 'a': wch = 7; break; case 'b': wch = 8; break; case 't': wch = 9; break; case 'n': wch = 10; break; case 'v': wch = 11; break; case 'f': wch = 12; break; case 'r': wch = 13; /* everything else represents itself */ default: break; } } /* now "wch" is the character to write out */ l++; (*p)++; if (blen >= bsize) { str = lw_realloc(str, bsize + 32); bsize += 32; } str[blen++] = wch; } } /* do something with the string here */ /* l is the string length, str is the string itself */ ln -> lstr = str; return l; } PARSEFUNC(pseudo_parse_fcc) { char delim; int i; if (!**p) { lwasm_register_error(as, l, "Bad operand"); return; } delim = **p; (*p)++; i = cstringlen(as, l, p, delim); if (**p != delim) { lwasm_register_error(as, l, "Bad operand"); return; } (*p)++; l -> len = i; } EMITFUNC(pseudo_emit_fcc) { int i; for (i = 0; i < l -> len; i++) lwasm_emit(l, l -> lstr[i]); } PARSEFUNC(pseudo_parse_fcs) { char delim; int i; if (!**p) { lwasm_register_error(as, l, "Bad operand"); return; } delim = **p; (*p)++; i = cstringlen(as, l, p, delim); if (**p != delim) { lwasm_register_error(as, l, "Bad operand"); return; } (*p)++; l -> len = i; } EMITFUNC(pseudo_emit_fcs) { int i; for (i = 0; i < l -> len - 1; i++) lwasm_emit(l, l -> lstr[i]); lwasm_emit(l, l -> lstr[i] | 0x80); } PARSEFUNC(pseudo_parse_fcn) { char delim; int i; if (!**p) { lwasm_register_error(as, l, "Bad operand"); return; } delim = **p; (*p)++; i = cstringlen(as, l, p, delim); if (**p != delim) { lwasm_register_error(as, l, "Bad operand"); return; } (*p)++; l -> len = i + 1; } EMITFUNC(pseudo_emit_fcn) { int i; for (i = 0; i < (l -> len - 1); i++) lwasm_emit(l, l -> lstr[i]); lwasm_emit(l, 0); } PARSEFUNC(pseudo_parse_rmb) { lw_expr_t expr; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, "Bad expression"); } l -> lint = 0; if (as -> instruct) { lwasm_reduce_expr(as, expr); if (!lw_expr_istype(expr, lw_expr_type_int)) { lwasm_register_error(as, l, "Expression must be constant at parse time"); } else { int e; e = lw_expr_intval(expr); register_struct_entry(as, l, e, NULL); l -> len = 0; l -> lint = 1; l -> symset = 1; } } else { if (l -> inmod) { l -> dlen = -1; l -> len = 0; } } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_rmb) { lw_expr_t expr; if (l -> lint) return; if (l -> inmod) { if (l -> dlen >= 0) return; } else { if (l -> len >= 0) return; } expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error(as, l, "Negative reservation sizes make no sense! (%d)", lw_expr_intval(expr)); l -> len = 0; l -> dlen = 0; return; } if (l -> inmod) l -> dlen = lw_expr_intval(expr); else l -> len = lw_expr_intval(expr); } } EMITFUNC(pseudo_emit_rmb) { if (l -> lint) return; if (l -> len < 0 || l -> dlen < 0) lwasm_register_error(as, l, "Expression not constant: %d %d", l -> len, l -> dlen); } PARSEFUNC(pseudo_parse_rmd) { lw_expr_t expr; l -> lint = 0; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, "Bad expression"); } if (as -> instruct) { lwasm_reduce_expr(as, expr); if (!lw_expr_istype(expr, lw_expr_type_int)) { lwasm_register_error(as, l, "Expression must be constant at parse time"); } else { int e; e = lw_expr_intval(expr) * 2; register_struct_entry(as, l, e, NULL); l -> len = 0; l -> symset = 1; l -> lint = 1; } } else { if (l -> inmod) { l -> dlen = -1; l -> len = 0; } } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_rmd) { lw_expr_t expr; if (l -> lint) return; if (l -> inmod) { if (l -> dlen >= 0) return; } else { if (l -> len >= 0) return; } expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error(as, l, "Negative reservation sizes make no sense! (%d)", lw_expr_intval(expr)); l -> len = 0; l -> dlen = 0; return; } if (l -> inmod) l -> dlen = lw_expr_intval(expr) * 2; else l -> len = lw_expr_intval(expr) * 2; } } EMITFUNC(pseudo_emit_rmd) { if (l -> lint) return; if (l -> len < 0 || l -> dlen < 0) lwasm_register_error(as, l, "Expression not constant"); } PARSEFUNC(pseudo_parse_rmq) { lw_expr_t expr; l -> lint = 0; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, "Bad expression"); } if (as -> instruct) { lwasm_reduce_expr(as, expr); if (!lw_expr_istype(expr, lw_expr_type_int)) { lwasm_register_error(as, l, "Expression must be constant at parse time"); } else { int e; e = lw_expr_intval(expr) * 4; register_struct_entry(as, l, e, NULL); l -> len = 0; l -> symset = 1; l -> lint = 1; } } else { if (as -> inmod) { l -> dlen = -1; l -> len = 0; } } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_rmq) { lw_expr_t expr; if (l -> lint) return; if (l -> inmod) { if (l -> dlen >= 0) return; } else { if (l -> len >= 0) return; } expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error(as, l, "Negative reservation sizes make no sense! (%d)", lw_expr_intval(expr)); l -> len = 0; l -> dlen = 0; return; } if (l -> inmod) l -> dlen = lw_expr_intval(expr) * 4; else l -> len = lw_expr_intval(expr) * 4; } } EMITFUNC(pseudo_emit_rmq) { if (l -> lint) return; if (l -> len < 0 || l -> dlen < 0) lwasm_register_error(as, l, "Expression not constant"); } PARSEFUNC(pseudo_parse_zmq) { lw_expr_t expr; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, "Bad expression"); } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_zmq) { lw_expr_t expr; if (l -> len >= 0) return; expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error(as, l, "Negative block sizes make no sense! (%d)", lw_expr_intval(expr)); l -> len = 0; return; } l -> len = lw_expr_intval(expr) * 4; } } EMITFUNC(pseudo_emit_zmq) { int i; if (l -> len < 0) { lwasm_register_error(as, l, "Expression not constant"); return; } for (i = 0; i < l -> len; i++) lwasm_emit(l, 0); } PARSEFUNC(pseudo_parse_zmd) { lw_expr_t expr; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, "Bad expression"); } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_zmd) { lw_expr_t expr; if (l -> len >= 0) return; expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error(as, l, "Negative block sizes make no sense! (%d)", lw_expr_intval(expr)); l -> len = 0; return; } l -> len = lw_expr_intval(expr) * 2; } } EMITFUNC(pseudo_emit_zmd) { int i; if (l -> len < 0) { lwasm_register_error(as, l, "Expression not constant"); return; } for (i = 0; i < l -> len; i++) lwasm_emit(l, 0); } PARSEFUNC(pseudo_parse_zmb) { lw_expr_t expr; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, "Bad expression"); } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_zmb) { lw_expr_t expr; if (l -> len >= 0) return; expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error(as, l, "Negative block sizes make no sense! (%d)", lw_expr_intval(expr)); l -> len = 0; return; } l -> len = lw_expr_intval(expr); } } EMITFUNC(pseudo_emit_zmb) { int i; if (l -> len < 0) { lwasm_register_error(as, l, "Expression not constant"); return; } for (i = 0; i < l -> len; i++) lwasm_emit(l, 0); } PARSEFUNC(pseudo_parse_org) { lw_expr_t e; l -> len = 0; e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, "Bad operand"); return; } lw_expr_destroy(l -> daddr); l -> daddr = e; if (l -> inmod == 0) { lw_expr_destroy(l -> addr); l -> addr = e; } l -> len = 0; } PARSEFUNC(pseudo_parse_equ) { lw_expr_t e; l -> len = 0; if (!(l -> sym)) { lwasm_register_error(as, l, "Missing symbol"); return; } e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, "Bad operand"); return; } register_symbol(as, l, l -> sym, e, symbol_flag_none); l -> symset = 1; l -> dptr = lookup_symbol(as, l, l -> sym); lw_expr_destroy(e); } PARSEFUNC(pseudo_parse_set) { lw_expr_t e; l -> len = 0; if (!(l -> sym)) { lwasm_register_error(as, l, "Missing symbol"); return; } e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, "Bad operand"); return; } register_symbol(as, l, l -> sym, e, symbol_flag_set); l -> symset = 1; l -> dptr = lookup_symbol(as, l, l -> sym); lw_expr_destroy(e); } PARSEFUNC(pseudo_parse_setdp) { lw_expr_t e; l -> len = 0; if (as -> output_format == OUTPUT_OBJ) { lwasm_register_error(as, l, "SETDP not permitted for object target"); return; } e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, "Bad operand"); return; } // try simplifying the expression and see if it turns into an int lwasm_reduce_expr(as, e); if (!lw_expr_istype(e, lw_expr_type_int)) { lwasm_register_error(as, l, "SETDP must be constant on pass 1"); lw_expr_destroy(e); return; } l -> dpval = lw_expr_intval(e) & 0xff; lw_expr_destroy(e); l -> dshow = l -> dpval; l -> dsize = 1; } PARSEFUNC(pseudo_parse_ifp1) { l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } lwasm_register_warning(as, l, "IFP1 if is not supported; ignoring"); } PARSEFUNC(pseudo_parse_ifp2) { l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } lwasm_register_warning(as, l, "IFP2 if is not supported; ignoring"); } PARSEFUNC(pseudo_parse_ifeq) { lw_expr_t e; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) != 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_ifne) { lw_expr_t e; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) == 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_ifgt) { lw_expr_t e; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) <= 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_ifge) { lw_expr_t e; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) < 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_iflt) { lw_expr_t e; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) >= 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_ifle) { lw_expr_t e; l -> hideline = 1; l -> len = 0; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) > 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_endc) { l -> hideline = 1; l -> len = 0; skip_operand(p); if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount--; if (as -> skipcount <= 0) as -> skipcond = 0; } } PARSEFUNC(pseudo_parse_else) { l -> len = 0; l -> hideline = 1; skip_operand(p); if (as -> skipmacro) return; if (as -> skipcond) { if (as -> skipcount == 1) { as -> skipcount = 0; as -> skipcond = 0; } return; } as -> skipcond = 1; as -> skipcount = 1; } PARSEFUNC(pseudo_parse_ifdef) { char *sym; int i; struct symtabe *s; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } again: for (i = 0; (*p)[i] && !isspace((*p)[i]) && (*p)[i] != '|' && (*p)[i] != '&'; i++) /* do nothing */ ; sym = lw_strndup(*p, i); (*p) += i; s = lookup_symbol(as, l, sym); lw_free(sym); if (!s) { if (**p == '|') { (*p)++; goto again; } as -> skipcond = 1; as -> skipcount = 1; } skip_operand(p); } PARSEFUNC(pseudo_parse_ifndef) { char *sym; int i; struct symtabe *s; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } for (i = 0; (*p)[i] && !isspace((*p)[i]) && (*p)[i] != '&' && (*p)[i] != '|'; i++) /* do nothing */ ; sym = lw_strndup(*p, i); (*p) += i; s = lookup_symbol(as, l, sym); lw_free(sym); if (s) { as -> skipcond = 1; as -> skipcount = 1; return; } } PARSEFUNC(pseudo_parse_error) { lwasm_register_error(as, l, "User error: %s", *p); skip_operand(p); } PARSEFUNC(pseudo_parse_warning) { lwasm_register_warning(as, l, "User warning: %s", *p); l -> len = 0; skip_operand(p); } PARSEFUNC(pseudo_parse_includebin) { char *fn, *p2; int delim = 0; FILE *fp; long flen; char *rfn; if (!**p) { lwasm_register_error(as, l, "Missing filename"); return; } if (**p == '"' || **p == '\'') { delim = **p; (*p)++; for (p2 = *p; *p2 && (*p2 != delim); p2++) /* do nothing */ ; } else { for (p2 = *p; *p2 && !isspace(*p2); p2++) /* do nothing */ ; } fn = lw_strndup(*p, p2 - *p); *p = p2; if (delim && **p) (*p)++; fp = input_open_standalone(as, fn, &rfn); if (!fp) { lwasm_register_error(as, l, "Cannot open file"); lw_free(fn); return; } l -> lstr = rfn; fseek(fp, 0, SEEK_END); flen = ftell(fp); fclose(fp); l -> len = flen; } EMITFUNC(pseudo_emit_includebin) { FILE *fp; int c; fp = fopen(l -> lstr, "r"); if (!fp) { lwasm_register_error(as, l, "Cannot open file (emit)!"); return; } for (;;) { c = fgetc(fp); if (c == EOF) { fclose(fp); return; } lwasm_emit(l, c); } } PARSEFUNC(pseudo_parse_include) { char *fn, *p2; char *p3; int delim = 0; int len; char buf[110]; if (!**p) { lwasm_register_error(as, l, "Missing filename"); return; } if (**p == '"' || **p == '\'') { delim = **p; (*p)++; for (p2 = *p; *p2 && *p2 != delim; p2++) /* do nothing */ ; } else { for (p2 = *p; *p2 && !isspace(*p2); p2++) /* do nothing */ ; } fn = lw_strndup(*p, p2 - *p); (*p) = p2; if (delim && **p) (*p)++; /* add a book-keeping entry for line numbers */ snprintf(buf, 100, "\001\001SETLINENO %d\n", l -> lineno + 1); input_openstring(as, "INTERNAL", buf); len = strlen(fn) + 8; p3 = lw_alloc(len + 1); sprintf(p3, "include:%s", fn); as -> fileerr = 0; input_open(as, p3); lw_free(p3); if (as -> fileerr == 0) l -> hideline = 1; l -> len = 0; lw_free(fn); } PARSEFUNC(pseudo_parse_align) { lw_expr_t e; if (!**p) { lwasm_register_error(as, l, "Bad operand"); return; } e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, "Bad operand"); return; } lwasm_save_expr(l, 0, e); if (**p == ',') { (*p)++; e = lwasm_parse_expr(as, p); } else { e = lw_expr_build(lw_expr_type_int, 0); } if (!e) { lwasm_register_error(as, l, "Bad padding"); return; } lwasm_save_expr(l, 1, e); } RESOLVEFUNC(pseudo_resolve_align) { lw_expr_t e; int align = 1; lw_expr_t te; int a; e = lwasm_fetch_expr(l, 0); if (lw_expr_istype(e, lw_expr_type_int)) { align = lw_expr_intval(e); if (align < 1) { lwasm_register_error(as, l, "Invalid alignment"); return; } } else { return; } te = lw_expr_copy(l -> addr); as -> exportcheck = 1; lwasm_reduce_expr(as, te); as -> exportcheck = 0; if (lw_expr_istype(te, lw_expr_type_int)) { a = lw_expr_intval(te); } else { a = -1; } lw_expr_destroy(te); if (a >= 0) { if (a % align == 0) { l -> len = 0; return; } l -> len = align - (a % align); return; } } EMITFUNC(pseudo_emit_align) { lw_expr_t e; int i; if (l -> csect && (l -> csect -> flags & (section_flag_bss | section_flag_constant))) return; e = lwasm_fetch_expr(l, 1); for (i = 0; i < l -> len; i++) { lwasm_emitexpr(l, e, 1); } } PARSEFUNC(pseudo_parse_fill) { lw_expr_t e, e1; if (!**p) { lwasm_register_error(as, l, "Bad operand"); return; } e1 = lwasm_parse_expr(as, p); if (**p != ',') { lwasm_register_error(as, l, "Bad operand"); return; } (*p)++; e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, "Bad operand"); return; } lwasm_save_expr(l, 0, e); lwasm_save_expr(l, 1, e1); if (!e1) { lwasm_register_error(as, l, "Bad padding"); return; } } RESOLVEFUNC(pseudo_resolve_fill) { lw_expr_t e, te; int align = 1; e = lwasm_fetch_expr(l, 0); te = lw_expr_copy(e); as -> exportcheck = 1; lwasm_reduce_expr(as, te); as -> exportcheck = 0; if (lw_expr_istype(te, lw_expr_type_int)) { align = lw_expr_intval(te); if (align < 0) { lw_expr_destroy(te); lwasm_register_error(as, l, "Invalid fill length"); return; } } else { lw_expr_destroy(te); return; } lw_expr_destroy(te); l -> len = align; } EMITFUNC(pseudo_emit_fill) { lw_expr_t e; int i; /* don't emit anything in bss */ if (l -> csect && (l -> csect -> flags & (section_flag_bss | section_flag_constant))) return; e = lwasm_fetch_expr(l, 1); for (i = 0; i < l -> len; i++) { lwasm_emitexpr(l, e, 1); } } /* string conditional argument parser */ /* argument syntax: a bare word ended by whitespace, comma, or NUL a double quote delimited string containing arbitrary printable characters a single quote delimited string containing arbitrary printable characters In a double quoted string, a double quote cannot be represented. In a single quoted string, a single quote cannot be represented. */ char *strcond_parsearg(char **p) { char *arg; char *tstr; int i; tstr = *p; if (!**p || isspace(**p)) { return lw_strdup(""); } if (*tstr == '"') { // double quote delim tstr++; for (i = 0; tstr[i] && tstr[i] != '"'; i++) /* do nothing */ ; arg = lw_alloc(i + 1); strncpy(arg, tstr, i); arg[i] = 0; if (tstr[i]) i++; *p += i; return arg; } else if (*tstr == '\'') { // single quote delim tstr++; for (i = 0; tstr[i] && tstr[i] != '\''; i++) /* do nothing */ ; arg = lw_alloc(i + 1); strncpy(arg, tstr, i); arg[i] = 0; if (tstr[i]) i++; *p += i; return arg; } else { // bare word - whitespace or comma delim for (i = 0; tstr[i] && !isspace(tstr[i]) && tstr[i] != ','; i++) /* do nothing */ ; arg = lw_alloc(i + 1); strncpy(arg, tstr, i); arg[i] = 0; if (tstr[i] == ',') i++; *p += i; return arg; } } /* string conditional helpers */ /* return "1" for true, "0" for false */ int strcond_eq(char **p) { char *arg1; char *arg2; int c = 0; arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); if (strcmp(arg1, arg2) == 0) c = 1; lw_free(arg1); lw_free(arg2); return c; } int strcond_ieq(char **p) { char *arg1; char *arg2; int c = 0; arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); if (strcasecmp(arg1, arg2) == 0) c = 1; lw_free(arg1); lw_free(arg2); return c; } int strcond_ne(char **p) { char *arg1; char *arg2; int c = 0; arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); if (strcmp(arg1, arg2) != 0) c = 1; lw_free(arg1); lw_free(arg2); return c; } int strcond_ine(char **p) { char *arg1; char *arg2; int c = 0; arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); if (strcasecmp(arg1, arg2) != 0) c = 1; lw_free(arg1); lw_free(arg2); return c; } int strcond_peq(char **p) { char *arg0; char *arg1; char *arg2; int plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) arg1[plen] = 0; if (strlen(arg2) > plen) arg2[plen] = 0; if (strcmp(arg1, arg2) == 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_ipeq(char **p) { char *arg0; char *arg1; char *arg2; int plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) arg1[plen] = 0; if (strlen(arg2) > plen) arg2[plen] = 0; if (strcasecmp(arg1, arg2) == 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_pne(char **p) { char *arg0; char *arg1; char *arg2; int plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) arg1[plen] = 0; if (strlen(arg2) > plen) arg2[plen] = 0; if (strcmp(arg1, arg2) != 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_ipne(char **p) { char *arg0; char *arg1; char *arg2; int plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) arg1[plen] = 0; if (strlen(arg2) > plen) arg2[plen] = 0; if (strcasecmp(arg1, arg2) != 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_seq(char **p) { char *arg0; char *arg1; char *arg2; char *rarg1; char *rarg2; int plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); rarg1 = arg1; rarg2 = arg2; plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) { rarg1 += strlen(arg1) - plen; } if (strlen(arg2) > plen) { rarg2 += strlen(arg2) - plen; } if (strcmp(rarg1, rarg2) == 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_iseq(char **p) { char *arg0; char *arg1; char *arg2; char *rarg1; char *rarg2; int plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); rarg1 = arg1; rarg2 = arg2; plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) { rarg1 += strlen(arg1) - plen; } if (strlen(arg2) > plen) { rarg2 += strlen(arg2) - plen; } if (strcasecmp(rarg1, rarg2) == 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_sne(char **p) { char *arg0; char *arg1; char *arg2; char *rarg1; char *rarg2; int plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); rarg1 = arg1; rarg2 = arg2; plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) { rarg1 += strlen(arg1) - plen; } if (strlen(arg2) > plen) { rarg2 += strlen(arg2) - plen; } if (strcmp(rarg1, rarg2) != 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_isne(char **p) { char *arg0; char *arg1; char *arg2; char *rarg1; char *rarg2; int plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); rarg1 = arg1; rarg2 = arg2; plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) { rarg1 += strlen(arg1) - plen; } if (strlen(arg2) > plen) { rarg2 += strlen(arg2) - plen; } if (strcasecmp(rarg1, rarg2) != 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } /* string conditionals */ PARSEFUNC(pseudo_parse_ifstr) { static struct strconds { char *str; int (*fn)(char **ptr); } strops[] = { { "eq", strcond_eq }, { "ieq", strcond_ieq }, { "ne", strcond_ne }, { "ine", strcond_ine }, { "peq", strcond_peq }, { "ipeq", strcond_ipeq }, { "pne", strcond_pne }, { "ipne", strcond_ipne }, { "seq", strcond_seq }, { "iseq", strcond_iseq }, { "sne", strcond_sne }, { "isne", strcond_isne }, { NULL, 0 } }; int tv = 0; char *tstr; int strop; l -> len = 0; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } tstr = strcond_parsearg(p); if (!**p || isspace(**p)) { lwasm_register_error(as, l, "Bad string condition"); return; } for (strop = 0; strops[strop].str != NULL; strop++) if (strcasecmp(strops[strop].str, tstr) == 0) break; lw_free(tstr); if (strops[strop].str == NULL) { lwasm_register_error(as, l, "Bad string condition"); } tv = (*(strops[strop].fn))(p); if (!tv) { as -> skipcond = 1; as -> skipcount = 1; } }