d0p1/tcc-stupidos
1
1
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Add support of asm label for variables.

Browse source 
Add support for asm labels for variables, that is the ability to rename
a variable at assembly level with __asm__ ("newname") appended in
its declaration.
See http://gcc.gnu.org/onlinedocs/gcc-4.4.4/gcc/Asm-Labels.html for more
details.
This commit is contained in:
Thomas Preud'homme 2011-02-07 23:43:18 +01:00
parent 32a682b88f
commit 11b2d33523
1 changed files with 23 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

33
tccgen.c
View file

@ -75,7 +75,7 @@ static void type_decl(CType *type, AttributeDef *ad, int *v, int td);
static void parse_expr_type(CType *type);
static void decl_initializer(CType *type, Section *sec, unsigned long c, int first, int size_only);
static void block(int *bsym, int *csym, int *case_sym, int *def_sym, int case_reg, int is_expr);
static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r, int has_init, int v, int scope);
static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r, int has_init, int v, char *asm_label, int scope);
static void expr_eq(void);
static void unary_type(CType *type);
static int is_compatible_parameter_types(CType *type1, CType *type2);
@ -3385,7 +3385,7 @@ ST_FUNC void unary(void)
mk_pointer(&type);
type.t |= VT_ARRAY;
memset(&ad, 0, sizeof(AttributeDef));
decl_initializer_alloc(&type, &ad, VT_CONST, 2, 0, 0);
decl_initializer_alloc(&type, &ad, VT_CONST, 2, 0, NULL, 0);
break;
case '(':
next();
@ -3404,7 +3404,7 @@ ST_FUNC void unary(void)
if (!(type.t & VT_ARRAY))
r |= lvalue_type(type.t);
memset(&ad, 0, sizeof(AttributeDef));
decl_initializer_alloc(&type, &ad, r, 1, 0, 0);
decl_initializer_alloc(&type, &ad, r, 1, 0, NULL, 0);
} else {
if (sizeof_caller) {
vpush(&type);
@ -4992,12 +4992,14 @@ static void decl_initializer(CType *type, Section *sec, unsigned long c,
/* parse an initializer for type 't' if 'has_init' is non zero, and
allocate space in local or global data space ('r' is either
VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
variable 'v' of scope 'scope' is declared before initializers are
parsed. If 'v' is zero, then a reference to the new object is put
in the value stack. If 'has_init' is 2, a special parsing is done
to handle string constants. */
variable 'v' with an associated name represented by 'asm_label' of
scope 'scope' is declared before initializers are parsed. If 'v' is
zero, then a reference to the new object is put in the value stack.
If 'has_init' is 2, a special parsing is done to handle string
constants. */
static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r,
int has_init, int v, int scope)
int has_init, int v, char *asm_label,
int scope)
{
int size, align, addr, data_offset;
int level;
@ -5164,6 +5166,7 @@ static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r,
if (v) {
if (scope != VT_CONST || !sym) {
sym = sym_push(v, type, r | VT_SYM, 0);
sym->asm_label = asm_label;
}
/* update symbol definition */
if (sec) {
@ -5550,10 +5553,20 @@ ST_FUNC void decl(int l)
if (gnu_ext && (tok == TOK_ATTRIBUTE1 || tok == TOK_ATTRIBUTE2))
parse_attribute((AttributeDef *) &fn->type.ref->r);
} else {
char *asm_label; // associated asm label
/* not lvalue if array */
r = 0;
asm_label = NULL;
if (!(type.t & VT_ARRAY))
r |= lvalue_type(type.t);
if (tok == TOK_ASM1 || tok == TOK_ASM2 || tok == TOK_ASM3) {
CString astr;
asm_label_instr(&astr);
asm_label = tcc_strdup(astr.data);
cstr_free(&astr);
}
has_init = (tok == '=');
if ((btype.t & VT_EXTERN) ||
((type.t & VT_ARRAY) && (type.t & VT_STATIC) &&
@ -5562,7 +5575,7 @@ ST_FUNC void decl(int l)
/* NOTE: as GCC, uninitialized global static
arrays of null size are considered as
extern */
external_sym(v, &type, r, NULL);
external_sym(v, &type, r, asm_label);
} else {
type.t |= (btype.t & VT_STATIC); /* Retain "static". */
if (type.t & VT_STATIC)
@ -5571,7 +5584,7 @@ ST_FUNC void decl(int l)
r |= l;
if (has_init)
next();
decl_initializer_alloc(&type, &ad, r, has_init, v, l);
decl_initializer_alloc(&type, &ad, r, has_init, v, asm_label, l);
}
}
if (tok != ',') {