Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
13c06be3 JD |
2 | # |
3 | # arch/i386/setjmp.S | |
4 | # | |
5 | # setjmp/longjmp for the i386 architecture | |
6 | # | |
7 | ||
8 | # | |
9 | # The jmp_buf is assumed to contain the following, in order: | |
10 | # %ebx | |
11 | # %esp | |
12 | # %ebp | |
13 | # %esi | |
14 | # %edi | |
15 | # <return address> | |
16 | # | |
17 | ||
18 | .text | |
19 | .align 4 | |
f44f1e7d FF |
20 | .globl kernel_setjmp |
21 | .type kernel_setjmp, @function | |
22 | kernel_setjmp: | |
13c06be3 JD |
23 | #ifdef _REGPARM |
24 | movl %eax,%edx | |
25 | #else | |
26 | movl 4(%esp),%edx | |
27 | #endif | |
28 | popl %ecx # Return address, and adjust the stack | |
29 | xorl %eax,%eax # Return value | |
30 | movl %ebx,(%edx) | |
31 | movl %esp,4(%edx) # Post-return %esp! | |
32 | pushl %ecx # Make the call/return stack happy | |
33 | movl %ebp,8(%edx) | |
34 | movl %esi,12(%edx) | |
35 | movl %edi,16(%edx) | |
36 | movl %ecx,20(%edx) # Return address | |
f94909ce | 37 | RET |
13c06be3 | 38 | |
f44f1e7d | 39 | .size kernel_setjmp,.-kernel_setjmp |
13c06be3 JD |
40 | |
41 | .text | |
42 | .align 4 | |
f44f1e7d FF |
43 | .globl kernel_longjmp |
44 | .type kernel_longjmp, @function | |
45 | kernel_longjmp: | |
13c06be3 JD |
46 | #ifdef _REGPARM |
47 | xchgl %eax,%edx | |
48 | #else | |
49 | movl 4(%esp),%edx # jmp_ptr address | |
50 | movl 8(%esp),%eax # Return value | |
51 | #endif | |
52 | movl (%edx),%ebx | |
53 | movl 4(%edx),%esp | |
54 | movl 8(%edx),%ebp | |
55 | movl 12(%edx),%esi | |
56 | movl 16(%edx),%edi | |
57 | jmp *20(%edx) | |
58 | ||
f44f1e7d | 59 | .size kernel_longjmp,.-kernel_longjmp |