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view lwasm/struct.c @ 504:16bd8effb2f6
Update lwcc driver to actually do something useful sometimes
Make lwcc driver actually find the correct filenames for the preprocessor
and compiler.
Construct the preprocessor argument list correctly instead of assigning all
arguments to argv[0], including the trailing NULL argument.
Instruct lwasm to use the object file format.
Correct state setting for -S and -c options so they stop after the correct
phases of compilation.
author | William Astle <lost@l-w.ca> |
---|---|
date | Thu, 24 Oct 2019 22:41:04 -0600 |
parents | 8764142b3192 |
children |
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/* struct.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/>. Contains stuff associated with structure processing */ #include <string.h> #include <lw_alloc.h> #include <lw_string.h> #include "lwasm.h" #include "instab.h" PARSEFUNC(pseudo_parse_struct) { structtab_t *s; if (as -> instruct) { lwasm_register_error(as, l, E_STRUCT_RECURSE); return; } if (l -> sym == NULL) { lwasm_register_error(as, l, E_STRUCT_NOSYMBOL); return; } for (s = as -> structs; s; s = s -> next) { if (!strcmp(s -> name, l -> sym)) break; } if (s) { lwasm_register_error(as, l, E_STRUCT_DUPE); return; } as -> instruct = 1; s = lw_alloc(sizeof(structtab_t)); s -> name = lw_strdup(l -> sym); s -> next = as -> structs; s -> fields = NULL; s -> size = 0; s -> definedat = l; as -> structs = s; as -> cstruct = s; skip_operand(p); l -> len = 0; l -> symset = 1; // save current assembly address and initialize to 0 as -> savedaddr = l -> addr; l -> addr = lw_expr_build(lw_expr_type_int, 0); } static void instantiate_struct(asmstate_t *as, line_t *l, structtab_t *s, char *pref, lw_expr_t baseaddr) { int len; char *t; int plen; int addr = 0; lw_expr_t te, te2; structtab_field_t *e; if (baseaddr == NULL) baseaddr = l -> addr; plen = strlen(pref); for (e = s -> fields; e; e = e -> next) { if (e -> name) { len = plen + strlen(e -> name) + 1; t = lw_alloc(len + 1); sprintf(t, "%s.%s", pref, e -> name); } else { len = plen + 30; t = lw_alloc(len + 1); sprintf(t, "%s.____%d", pref, addr); } te = lw_expr_build(lw_expr_type_int, addr); te2 = lw_expr_build(lw_expr_type_oper, lw_expr_oper_plus, te, baseaddr); register_symbol(as, l, t, te2, symbol_flag_nocheck); lw_expr_destroy(te); if (e -> substruct) { instantiate_struct(as, l, e -> substruct, t, te2); } lw_expr_destroy(te2); lw_free(t); addr += e -> size; } /* register the "sizeof" symbol */ len = plen + 8; t = lw_alloc(len + 1); sprintf(t, "sizeof{%s}", pref); te = lw_expr_build(lw_expr_type_int, s -> size); register_symbol(as, l, t, te, symbol_flag_nocheck); lw_expr_destroy(te); lw_free(t); } PARSEFUNC(pseudo_parse_endstruct) { lw_expr_t te; if (as -> instruct == 0) { lwasm_register_error(as, l, W_ENDSTRUCT_WITHOUT); skip_operand(p); return; } te = lw_expr_build(lw_expr_type_int, 0); // make all the relevant generic struct symbols instantiate_struct(as, l, as -> cstruct, as -> cstruct -> name, te); lw_expr_destroy(te); l -> soff = as -> cstruct -> size; as -> instruct = 0; skip_operand(p); lw_expr_destroy(l -> addr); l -> addr = as -> savedaddr; as -> savedaddr = NULL; l -> len = 0; } void register_struct_entry(asmstate_t *as, line_t *l, int size, structtab_t *ss) { structtab_field_t *e, *e2; l -> soff = as -> cstruct -> size; e = lw_alloc(sizeof(structtab_field_t)); e -> next = NULL; e -> size = size; if (l -> sym) e -> name = lw_strdup(l -> sym); else e -> name = NULL; e -> substruct = ss; if (as -> cstruct -> fields) { for (e2 = as -> cstruct -> fields; e2 -> next; e2 = e2 -> next) /* do nothing */ ; e2 -> next = e; } else { as -> cstruct -> fields = e; } as -> cstruct -> size += size; } int expand_struct(asmstate_t *as, line_t *l, char **p, char *opc) { structtab_t *s; debug_message(as, 200, "Checking for structure expansion: %s", opc); for (s = as -> structs; s; s = s -> next) { if (!strcmp(opc, s -> name)) break; } if (!s) return -1; debug_message(as, 10, "Expanding structure: %s", opc); if (!(l -> sym)) { lwasm_register_error(as, l, E_STRUCT_NONAME); return -1; } l -> len = s -> size; if (as -> instruct) { /* register substruct here */ register_struct_entry(as, l, s -> size, s); /* mark the symbol consumed */ l -> symset = 1; l -> len = 0; return 0; } else { /* instantiate the struct here */ instantiate_struct(as, l, s, l -> sym, NULL); return 0; } return 0; }