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i386 + bcheck: fix __bound_local_new 

With -b, this produces garbage. Code to call __bound_local_new
is put at wrong place, overwriting the regparam setup code.
Fix copied from x86_64-gen.c.

void __attribute__((regparm(3)))
fun(int unused)
{
  char local[1];
}
master
Pavlas, Zdenek 2016-11-09 00:22:28 -08:00
parent 3054a76249
commit cdf715a0b5
2 changed files with 9 additions and 7 deletions
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14
i386-gen.c
View File

@ -107,6 +107,7 @@ static unsigned long func_sub_sp_offset;
static int func_ret_sub;
#ifdef CONFIG_TCC_BCHECK
static addr_t func_bound_offset;
static unsigned long func_bound_ind;
#endif
/* XXX: make it faster ? */
@ -611,9 +612,10 @@ ST_FUNC void gfunc_prolog(CType *func_type)
#ifdef CONFIG_TCC_BCHECK
/* leave some room for bound checking code */
if (tcc_state->do_bounds_check) {
func_bound_offset = lbounds_section->data_offset;
func_bound_ind = ind;
oad(0xb8, 0); /* lbound section pointer */
oad(0xb8, 0); /* call to function */
func_bound_offset = lbounds_section->data_offset;
}
#endif
}
@ -629,27 +631,27 @@ ST_FUNC void gfunc_epilog(void)
addr_t saved_ind;
addr_t *bounds_ptr;
Sym *sym_data;
/* add end of table info */
bounds_ptr = section_ptr_add(lbounds_section, sizeof(addr_t));
*bounds_ptr = 0;
/* generate bound local allocation */
saved_ind = ind;
ind = func_sub_sp_offset;
ind = func_bound_ind;
sym_data = get_sym_ref(&char_pointer_type, lbounds_section,
func_bound_offset, lbounds_section->data_offset);
greloc(cur_text_section, sym_data,
ind + 1, R_386_32);
oad(0xb8, 0); /* mov %eax, xxx */
gen_static_call(TOK___bound_local_new);
ind = saved_ind;
/* generate bound check local freeing */
o(0x5250); /* save returned value, if any */
greloc(cur_text_section, sym_data,
ind + 1, R_386_32);
greloc(cur_text_section, sym_data, ind + 1, R_386_32);
oad(0xb8, 0); /* mov %eax, xxx */
gen_static_call(TOK___bound_local_delete);
o(0x585a); /* restore returned value, if any */
}
#endif

2
x86_64-gen.c
View File

@ -1658,7 +1658,7 @@ void gfunc_epilog(void)
o(0x5250); /* save returned value, if any */
greloc(cur_text_section, sym_data, ind + 1, R_386_32);
oad(0xb8, 0); /* mov xxx, %rax */
o(0xc78948); /* mov %rax,%rdi ## first arg in %rdi, this must be ptr */
o(0xc78948); /* mov %rax,%rdi # first arg in %rdi, this must be ptr */
gen_static_call(TOK___bound_local_delete);
o(0x585a); /* restore returned value, if any */
}