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/* ---------------------------------------------- */
/* alloca-bt.S */
#ifdef __leading_underscore
# define _(s) _##s
#else
# define _(s) s
#endif
/* ---------------------------------------------- */
#if defined __i386__
.globl _(__bound_alloca)
_(__bound_alloca):
pop %edx
pop %eax
mov %eax, %ecx
add $3+1,%eax
and $-4,%eax
jz p6
#ifdef _WIN32
p4:
cmp $4096,%eax
jbe p5
test %eax,-4096(%esp)
sub $4096,%esp
sub $4096,%eax
jmp p4
p5:
#endif
sub %eax,%esp
mov %esp,%eax
push %edx
push %eax
push %ecx
push %eax
call _(__bound_new_region)
add $8, %esp
pop %eax
pop %edx
p6:
push %edx
push %edx
ret
/* ---------------------------------------------- */
#elif defined __x86_64__
.globl _(__bound_alloca)
_(__bound_alloca):
#ifdef _WIN32
inc %rcx # add one extra to separate regions
jmp _(alloca)
.globl _(__bound_alloca_nr)
_(__bound_alloca_nr):
dec %rcx
push %rax
mov %rcx,%rdx
mov %rax,%rcx
sub $32,%rsp
call _(__bound_new_region)
add $32,%rsp
pop %rax
ret
#else
pop %rdx
mov %rdi,%rax
mov %rax,%rsi # size, a second parm to the __bound_new_region
add $15 + 1,%rax # add one extra to separate regions
and $-16,%rax
jz p3
sub %rax,%rsp
mov %rsp,%rdi # pointer, a first parm to the __bound_new_region
mov %rsp,%rax
push %rdx
push %rax
call _(__bound_new_region)
pop %rax
pop %rdx
p3:
push %rdx
ret
#endif
/* ---------------------------------------------- */
#endif
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