1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
| /* SPDX-License-Identifier: GPL-2.0 */
| #include <as-layout.h>
|
| .section .__syscall_stub, "ax"
| .globl batch_syscall_stub
| batch_syscall_stub:
| mov $(STUB_DATA), %rbx
| /* load pointer to first operation */
| mov %rbx, %rsp
| add $0x10, %rsp
| again:
| /* load length of additional data */
| mov 0x0(%rsp), %rax
|
| /* if(length == 0) : end of list */
| /* write possible 0 to header */
| mov %rax, 8(%rbx)
| cmp $0, %rax
| jz done
|
| /* save current pointer */
| mov %rsp, 8(%rbx)
|
| /* skip additional data */
| add %rax, %rsp
|
| /* load syscall-# */
| pop %rax
|
| /* load syscall params */
| pop %rdi
| pop %rsi
| pop %rdx
| pop %r10
| pop %r8
| pop %r9
|
| /* execute syscall */
| syscall
|
| /* check return value */
| pop %rcx
| cmp %rcx, %rax
| je again
|
| done:
| /* save return value */
| mov %rax, (%rbx)
|
| /* stop */
| int3
|
|
