tccgen: handle __attribute((alias("target")))

Joe Soroka committed 15 years ago

Commit c93eca41 parent ce8c1883 files · +27 −1Browse files

Unified · Split

3 files

@@ -285,6 +285,7 @@ typedef struct AttributeDef { · 284 unmodified lines
285	285	resize : 1,
286	286	fill : 10;
287	287	struct Section *section;
	288	+ int alias_target; /* token */
288	289	} AttributeDef;
289	290
290	291	/* gr: wrappers for casting sym->r for other purposes */

@@ -2472,6 +2472,16 @@ static void parse_attribute(AttributeDef *ad) · 2471 unmodified lines
2472	2472	next();
2473	2473	skip(')');
2474	2474	break;
	2475	+ case TOK_ALIAS1:
	2476	+ case TOK_ALIAS2:
	2477	+ skip('(');
	2478	+ if (tok != TOK_STR)
	2479	+ expect("alias(\"target\")");
	2480	+ ad->alias_target = /* save string as token, for later */
	2481	+ tok_alloc((char*)tokc.cstr->data, tokc.cstr->size-1)->tok;
	2482	+ next();
	2483	+ skip(')');
	2484	+ break;
2475	2485	case TOK_ALIGNED1:
2476	2486	case TOK_ALIGNED2:
2477	2487	if (tok == '(') {
@@ -5578,7 +5588,20 @@ ST_FUNC void decl(int l) · 3100 unmodified lines
5578	5588	/* NOTE: as GCC, uninitialized global static
5579	5589	arrays of null size are considered as
5580	5590	extern */
5581		− external_sym(v, &type, r, asm_label);
	5591	+ sym = external_sym(v, &type, r, asm_label);
	5592	+
	5593	+ if (ad.alias_target) {
	5594	+ Section tsec;
	5595	+ Elf32_Sym *esym;
	5596	+ Sym *alias_target;
	5597	+
	5598	+ alias_target = sym_find(ad.alias_target);
	5599	+ if (!alias_target \|\| !alias_target->c)
	5600	+ error("unsupported forward __alias__ attribute");
	5601	+ esym = &((Elf32_Sym *)symtab_section->data)[alias_target->c];
	5602	+ tsec.sh_num = esym->st_shndx;
	5603	+ put_extern_sym2(sym, &tsec, esym->st_value, esym->st_size, 0);
	5604	+ }
5582	5605	} else {
5583	5606	type.t \|= (btype.t & VT_STATIC); /* Retain "static". */
5584	5607	if (type.t & VT_STATIC)

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