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.text
.globl _start
.type _start,@function
.p2align 4
_start:
xorl %ebp, %ebp
#ifdef __LP64__
popq %rdi
movq %rsp, %rsi
andq $~15, %rsp
#elif defined __x86_64__
mov (%rsp),%edi
addl $4,%esp
movl %esp, %esi
andl $~15, %esp
#else
popl %esi
movl %esp, %ecx
andl $~15, %esp
subl $8,%esp
pushl %ecx
pushl %esi
#endif
call main
hlt
.type syscall, @function
.globl syscall
.p2align 4
syscall:
#ifdef __x86_64__
movq %rdi, %rax /* Syscall number -> rax. */
movq %rsi, %rdi /* shift arg1 - arg5. */
movq %rdx, %rsi
movq %rcx, %rdx
movq %r8, %r10
movq %r9, %r8
movq 8(%rsp),%r9 /* arg6 is on the stack. */
syscall /* Do the system call. */
#else
push %ebp
push %edi
push %esi
push %ebx
mov 0x2c(%esp),%ebp
mov 0x28(%esp),%edi
mov 0x24(%esp),%esi
mov 0x20(%esp),%edx
mov 0x1c(%esp),%ecx
mov 0x18(%esp),%ebx
mov 0x14(%esp),%eax
int $0x80
pop %ebx
pop %esi
pop %edi
pop %ebp
#endif
ret /* Return to caller. */
.size syscall, .-syscall
.section .note.GNU-stack,"",@progbits
.section ".note.gnu.property", "a"
#ifdef __LP64__
.p2align 3
#else
.p2align 2
#endif
.long 1f - 0f /* name length */
.long 5f - 2f /* data length */
.long 5 /* note type */
0: .asciz "GNU" /* vendor name */
1:
#ifdef __LP64__
.p2align 3
#else
.p2align 2
#endif
2: .long 0xc0000002 /* pr_type. */
.long 4f - 3f /* pr_datasz. */
3:
.long 0x2
4:
#ifdef __LP64__
.p2align 3
#else
.p2align 2
#endif
5:
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