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view lwasm/instab.h @ 273:1409debcb1a0
Fix crash on listing when nested noexpand macros are used
Macros flagged noexpand were causing a segfault during listing. The problem
was incorrect accounting for nesting levels for noexpand macros causing the
listing handler to fall off the end of the program in certain circumstances
and in other circumstances it would fail to suppress expansion. Both the
segfault in the case of misbehaviour and the misbhaviour itself are
corrected with this update.
If you do not use nested noexpand macros, this bug has no effect.
author | William Astle <lost@l-w.ca> |
---|---|
date | Sat, 25 May 2013 13:35:46 -0600 |
parents | 697bc543368c |
children | 507f442dc71e |
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/* instab.h Copyright © 2008 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/>. Contains definitions for the instruction table */ #ifndef __instab_h_seen__ #define __instab_h_seen__ #include "lwasm.h" typedef struct { char *opcode; /* the mneumonic */ int ops[4]; /* opcode values for up to four addr modes */ void (*parse)(asmstate_t *as, line_t *l, char **optr); /* parse operand for insn */ void (*resolve)(asmstate_t *as, line_t *l, int force); /* resolve instruction to code */ void (*emit)(asmstate_t *as, line_t *l); /* resolve instruction to code */ int flags; /* flag for this instruction */ } instab_t; enum { lwasm_insn_cond = 1, /* conditional instruction */ lwasm_insn_endm = 2, /* end of macro */ lwasm_insn_setsym = 4, /* insn sets symbol address */ lwasm_insn_is6309 = 8, /* insn is 6309 only */ lwasm_insn_struct = 16, /* insn allowed in a struct */ lwasm_insn_setdata = 32, /* insn uses the data address for symbols */ lwasm_insn_normal = 0 }; #define PARSEFUNC(fn) void (fn)(asmstate_t *as, line_t *l, char **p) #define RESOLVEFUNC(fn) void (fn)(asmstate_t *as, line_t *l, int force) #define EMITFUNC(fn) void (fn)(asmstate_t *as, line_t *l) #ifndef __instab_c_seen__ extern instab_t instab[]; #endif //__instab_c_seen__ #endif //__instab_h_seen__