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Add support of asm label for functions.
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
parent
a7fb00e887
commit
9b09fc376e
11
libtcc.c
11
libtcc.c
@ -72,6 +72,12 @@ ST_DATA void *rt_prog_main;
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#endif /* ALL_IN_ONE */
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/********************************************************/
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#ifndef CONFIG_TCC_ASM_LABEL
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ST_FUNC void asm_label_instr(CString *)
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{
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error("inline asm() not supported");
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}
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#endif
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#ifndef CONFIG_TCC_ASM
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ST_FUNC void asm_instr(void)
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{
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@ -436,7 +442,10 @@ ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
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}
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if (!sym->c) {
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name = get_tok_str(sym->v, NULL);
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if (sym->a)
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name = get_tok_str(sym->a, NULL);
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else
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name = get_tok_str(sym->v, NULL);
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#ifdef CONFIG_TCC_BCHECK
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if (tcc_state->do_bounds_check) {
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char buf[32];
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3
tcc.h
3
tcc.h
@ -118,6 +118,7 @@
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#if !defined(TCC_TARGET_ARM) && !defined(TCC_TARGET_C67)
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#define CONFIG_TCC_ASM
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#endif
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#define CONFIG_TCC_ASM_LABEL
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/* object format selection */
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#if defined(TCC_TARGET_C67)
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@ -211,6 +212,7 @@ typedef struct SValue {
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/* symbol management */
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typedef struct Sym {
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int v; /* symbol token */
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int a; /* asm symbol token */
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long r; /* associated register */
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union {
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long c; /* associated number */
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@ -1189,6 +1191,7 @@ ST_FUNC int tcc_load_coff(TCCState * s1, int fd);
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/* ------------ tccasm.c ------------ */
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ST_FUNC void asm_instr(void);
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ST_FUNC void asm_label_instr(CString *);
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ST_FUNC void asm_global_instr(void);
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#ifdef CONFIG_TCC_ASM
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20
tccasm.c
20
tccasm.c
@ -18,6 +18,8 @@
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef CONFIG_TCC_ASM
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#include "tcc.h"
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ST_FUNC int asm_get_local_label_name(TCCState *s1, unsigned int n)
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@ -991,6 +993,8 @@ static void parse_asm_operands(ASMOperand *operands, int *nb_operands_ptr,
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}
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}
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#endif
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static void parse_asm_str(CString *astr)
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{
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skip('(');
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@ -1006,6 +1010,20 @@ static void parse_asm_str(CString *astr)
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cstr_ccat(astr, '\0');
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}
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/* Parse an asm label and return the label
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* Don't forget to free the CString in the caller! */
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static void asm_label_instr(CString *astr)
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{
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next();
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parse_asm_str(astr);
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skip(')');
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#ifdef ASM_DEBUG
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printf("asm_alias: \"%s\"\n", (char *)astr->data);
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#endif
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}
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#ifdef CONFIG_TCC_ASM
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/* parse the GCC asm() instruction */
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ST_FUNC void asm_instr(void)
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{
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@ -1136,3 +1154,5 @@ ST_FUNC void asm_global_instr(void)
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cstr_free(&astr);
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}
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#endif
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25
tccgen.c
25
tccgen.c
@ -136,6 +136,7 @@ ST_FUNC Sym *sym_push2(Sym **ps, int v, int t, long c)
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{
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Sym *s;
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s = sym_malloc();
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s->a = 0;
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s->v = v;
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s->type.t = t;
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s->type.ref = NULL;
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@ -368,6 +369,8 @@ static Sym *external_sym(int v, CType *type, int r)
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if (!s) {
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/* push forward reference */
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s = sym_push(v, type, r | VT_CONST | VT_SYM, 0);
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if (type && type->ref && type->ref->a)
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s->a = type->ref->a;
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s->type.t |= VT_EXTERN;
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} else if (s->type.ref == func_old_type.ref) {
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s->type.ref = type->ref;
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@ -2996,6 +2999,8 @@ static void post_type(CType *type, AttributeDef *ad)
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CType pt;
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if (tok == '(') {
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TokenSym *ts = NULL;
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/* function declaration */
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next();
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l = 0;
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@ -3051,10 +3056,19 @@ static void post_type(CType *type, AttributeDef *ad)
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/* NOTE: const is ignored in returned type as it has a special
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meaning in gcc / C++ */
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type->t &= ~(VT_STORAGE | VT_CONSTANT);
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if (tok == TOK_ASM1 || tok == TOK_ASM2 || tok == TOK_ASM3) {
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CString astr;
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asm_label_instr(&astr);
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ts = tok_alloc(astr.data, strlen(astr.data));
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cstr_free(&astr);
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}
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post_type(type, ad);
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/* we push a anonymous symbol which will contain the function prototype */
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ad->func_args = arg_size;
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s = sym_push(SYM_FIELD, type, INT_ATTR(ad), l);
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if (ts != NULL)
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s->a = ts->tok;
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s->next = first;
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type->t = t1 | VT_FUNC;
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type->ref = s;
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@ -5228,7 +5242,10 @@ static void gen_function(Sym *sym)
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ind = cur_text_section->data_offset;
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/* NOTE: we patch the symbol size later */
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put_extern_sym(sym, cur_text_section, ind, 0);
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funcname = get_tok_str(sym->v, NULL);
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if (sym->a)
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funcname = get_tok_str(sym->a, NULL);
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else
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funcname = get_tok_str(sym->v, NULL);
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func_ind = ind;
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/* put debug symbol */
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if (tcc_state->do_debug)
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@ -5308,6 +5325,12 @@ ST_FUNC void decl(int l)
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Sym *sym;
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AttributeDef ad;
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/*
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* type.ref must be either a valid reference or NULL for external_sym to
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* work. As type = btype is executed before external_sym is call, setting
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* btype.ref to 0 is enough.
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*/
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btype.ref = 0;
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while (1) {
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if (!parse_btype(&btype, &ad)) {
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/* skip redundant ';' */
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