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Add support of asm label for functions.

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Add support for asm labels for functions, that is the ability to rename
a function at assembly level with __asm__ ("newname") appended in
function declaration.
This commit is contained in:
Thomas Preud'homme
2010-09-05 22:39:34 +02:00
parent a7fb00e887
commit 9b09fc376e
4 changed files with 57 additions and 2 deletions
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25
tccgen.c
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@ -136,6 +136,7 @@ ST_FUNC Sym *sym_push2(Sym **ps, int v, int t, long c)
{
Sym *s;
s = sym_malloc();
s->a = 0;
s->v = v;
s->type.t = t;
s->type.ref = NULL;
@ -368,6 +369,8 @@ static Sym *external_sym(int v, CType *type, int r)
if (!s) {
/* push forward reference */
s = sym_push(v, type, r | VT_CONST | VT_SYM, 0);
if (type && type->ref && type->ref->a)
s->a = type->ref->a;
s->type.t |= VT_EXTERN;
} else if (s->type.ref == func_old_type.ref) {
s->type.ref = type->ref;
@ -2996,6 +2999,8 @@ static void post_type(CType *type, AttributeDef *ad)
CType pt;
if (tok == '(') {
TokenSym *ts = NULL;
/* function declaration */
next();
l = 0;
@ -3051,10 +3056,19 @@ static void post_type(CType *type, AttributeDef *ad)
/* NOTE: const is ignored in returned type as it has a special
meaning in gcc / C++ */
type->t &= ~(VT_STORAGE | VT_CONSTANT);
if (tok == TOK_ASM1 || tok == TOK_ASM2 || tok == TOK_ASM3) {
CString astr;
asm_label_instr(&astr);
ts = tok_alloc(astr.data, strlen(astr.data));
cstr_free(&astr);
}
post_type(type, ad);
/* we push a anonymous symbol which will contain the function prototype */
ad->func_args = arg_size;
s = sym_push(SYM_FIELD, type, INT_ATTR(ad), l);
if (ts != NULL)
s->a = ts->tok;
s->next = first;
type->t = t1 | VT_FUNC;
type->ref = s;
@ -5228,7 +5242,10 @@ static void gen_function(Sym *sym)
ind = cur_text_section->data_offset;
/* NOTE: we patch the symbol size later */
put_extern_sym(sym, cur_text_section, ind, 0);
funcname = get_tok_str(sym->v, NULL);
if (sym->a)
funcname = get_tok_str(sym->a, NULL);
else
funcname = get_tok_str(sym->v, NULL);
func_ind = ind;
/* put debug symbol */
if (tcc_state->do_debug)
@ -5308,6 +5325,12 @@ ST_FUNC void decl(int l)
Sym *sym;
AttributeDef ad;
/*
* type.ref must be either a valid reference or NULL for external_sym to
* work. As type = btype is executed before external_sym is call, setting
* btype.ref to 0 is enough.
*/
btype.ref = 0;
while (1) {
if (!parse_btype(&btype, &ad)) {
/* skip redundant ';' */