kolibrios/programs/develop/ktcc/trunk/source/lib/alloca86_64.S
siemargl b5e7b54c7a compiler 0.9.26 release
git-svn-id: svn://kolibrios.org@6429 a494cfbc-eb01-0410-851d-a64ba20cac60
2016-05-14 08:56:15 +00:00

43 lines
716 B
ArmAsm

/* ---------------------------------------------- */
/* alloca86_64.S */
.globl alloca
alloca:
pop %rdx
#ifdef TCC_TARGET_PE
mov %rcx,%rax
#else
mov %rdi,%rax
#endif
add $15,%rax
and $-16,%rax
jz p3
#ifdef TCC_TARGET_PE
p1:
cmp $4096,%rax
jbe p2
test %rax,-4096(%rsp)
sub $4096,%rsp
sub $4096,%rax
jmp p1
p2:
#endif
sub %rax,%rsp
mov %rsp,%rax
#ifdef TCC_TARGET_PE
add $32,%rax
#endif
p3:
push %rdx
ret
/* mark stack as nonexecutable */
#if defined __ELF__ && defined __linux__
.section .note.GNU-stack,"",@progbits
#endif
/* ---------------------------------------------- */