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

Joe Soroka committed 15 years ago

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

Unified · Split

3 files

tcc.h +1 −0
tccgen.c +24 −1
tcctok.h +2 −0

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

tccgen.c+24−1

@@ -2472,6 +2472,16 @@ static void parse_attribute(AttributeDef *ad) · 2471 unmodified lines
2472	next();	2472	next();
2473	skip(')');	2473	skip(')');
2474	break;	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	case TOK_ALIGNED1:	2485	case TOK_ALIGNED1:
2476	case TOK_ALIGNED2:	2486	case TOK_ALIGNED2:
2477	if (tok == '(') {	2487	if (tok == '(') {
@@ -5578,7 +5588,20 @@ ST_FUNC void decl(int l) · 3100 unmodified lines
5578	/* NOTE: as GCC, uninitialized global static	5588	/* NOTE: as GCC, uninitialized global static
5579	arrays of null size are considered as	5589	arrays of null size are considered as
5580	extern */	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	} else {	5605	} else {
5583	type.t \|= (btype.t & VT_STATIC); /* Retain "static". */	5606	type.t \|= (btype.t & VT_STATIC); /* Retain "static". */
5584	if (type.t & VT_STATIC)	5607	if (type.t & VT_STATIC)

tcctok.h+2−0

      DEF(TOK_PACKED2, "__packed__")
      DEF(TOK_WEAK1, "weak")
      DEF(TOK_WEAK2, "__weak__")
+     DEF(TOK_ALIAS1, "alias")
+     DEF(TOK_ALIAS2, "__alias__")
      DEF(TOK_UNUSED1, "unused")
      DEF(TOK_UNUSED2, "__unused__")
      DEF(TOK_CDECL1, "cdecl")

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

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