47 lines
864 B
ArmAsm
47 lines
864 B
ArmAsm
.global sys32_helper
|
|
sys32_helper:
|
|
/* Args: syscall_args_32*, function pointer */
|
|
pushl %ebp
|
|
pushl %ebx
|
|
pushl %esi
|
|
pushl %edi
|
|
movl 5*4(%esp), %eax /* pointer to args struct */
|
|
|
|
movl 1*4(%eax), %ebx
|
|
movl 2*4(%eax), %ecx
|
|
movl 3*4(%eax), %edx
|
|
movl 4*4(%eax), %esi
|
|
movl 5*4(%eax), %edi
|
|
movl 6*4(%eax), %ebp
|
|
movl 0*4(%eax), %eax
|
|
|
|
call *(6*4)(%esp) /* Do the syscall */
|
|
|
|
/* Now we need to recover without losing any reg values */
|
|
pushl %eax
|
|
movl 6*4(%esp), %eax
|
|
popl 0*4(%eax)
|
|
movl %ebx, 1*4(%eax)
|
|
movl %ecx, 2*4(%eax)
|
|
movl %edx, 3*4(%eax)
|
|
movl %esi, 4*4(%eax)
|
|
movl %edi, 5*4(%eax)
|
|
movl %ebp, 6*4(%eax)
|
|
|
|
popl %edi
|
|
popl %esi
|
|
popl %ebx
|
|
popl %ebp
|
|
ret
|
|
|
|
.type sys32_helper, @function
|
|
.size sys32_helper, .-sys32_helper
|
|
|
|
.global int80_and_ret
|
|
int80_and_ret:
|
|
int $0x80
|
|
ret
|
|
|
|
.type int80_and_ret, @function
|
|
.size int80_and_ret, .-int80_and_ret
|