| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|
| 2 | .global sys32_helper |
|---|
| 3 | sys32_helper: |
|---|
| 4 | /* Args: syscall_args_32*, function pointer */ |
|---|
| 5 | pushl %ebp |
|---|
| 6 | pushl %ebx |
|---|
| 7 | pushl %esi |
|---|
| 8 | pushl %edi |
|---|
| 9 | movl 5*4(%esp), %eax /* pointer to args struct */ |
|---|
| 10 | |
|---|
| 11 | movl 1*4(%eax), %ebx |
|---|
| 12 | movl 2*4(%eax), %ecx |
|---|
| 13 | movl 3*4(%eax), %edx |
|---|
| 14 | movl 4*4(%eax), %esi |
|---|
| 15 | movl 5*4(%eax), %edi |
|---|
| 16 | movl 6*4(%eax), %ebp |
|---|
| 17 | movl 0*4(%eax), %eax |
|---|
| 18 | |
|---|
| 19 | call *(6*4)(%esp) /* Do the syscall */ |
|---|
| 20 | |
|---|
| 21 | /* Now we need to recover without losing any reg values */ |
|---|
| 22 | pushl %eax |
|---|
| 23 | movl 6*4(%esp), %eax |
|---|
| 24 | popl 0*4(%eax) |
|---|
| 25 | movl %ebx, 1*4(%eax) |
|---|
| 26 | movl %ecx, 2*4(%eax) |
|---|
| 27 | movl %edx, 3*4(%eax) |
|---|
| 28 | movl %esi, 4*4(%eax) |
|---|
| 29 | movl %edi, 5*4(%eax) |
|---|
| 30 | movl %ebp, 6*4(%eax) |
|---|
| 31 | |
|---|
| 32 | popl %edi |
|---|
| 33 | popl %esi |
|---|
| 34 | popl %ebx |
|---|
| 35 | popl %ebp |
|---|
| 36 | ret |
|---|
| 37 | |
|---|
| 38 | .type sys32_helper, @function |
|---|
| 39 | .size sys32_helper, .-sys32_helper |
|---|
| 40 | |
|---|
| 41 | .global int80_and_ret |
|---|
| 42 | int80_and_ret: |
|---|
| 43 | int $0x80 |
|---|
| 44 | ret |
|---|
| 45 | |
|---|
| 46 | .type int80_and_ret, @function |
|---|
| 47 | .size int80_and_ret, .-int80_and_ret |
|---|
| 48 | |
|---|
| 49 | .section .note.GNU-stack,"" ,%progbits |
|---|
| 50 | |
|---|
