Commit | Line | Data |
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13c06be3 JD |
1 | # |
2 | # arch/x86_64/setjmp.S | |
3 | # | |
4 | # setjmp/longjmp for the x86-64 architecture | |
5 | # | |
6 | ||
7 | # | |
8 | # The jmp_buf is assumed to contain the following, in order: | |
9 | # %rbx | |
10 | # %rsp (post-return) | |
11 | # %rbp | |
12 | # %r12 | |
13 | # %r13 | |
14 | # %r14 | |
15 | # %r15 | |
16 | # <return address> | |
17 | # | |
18 | ||
19 | .text | |
20 | .align 4 | |
21 | .globl setjmp | |
22 | .type setjmp, @function | |
23 | setjmp: | |
24 | pop %rsi # Return address, and adjust the stack | |
25 | xorl %eax,%eax # Return value | |
26 | movq %rbx,(%rdi) | |
27 | movq %rsp,8(%rdi) # Post-return %rsp! | |
28 | push %rsi # Make the call/return stack happy | |
29 | movq %rbp,16(%rdi) | |
30 | movq %r12,24(%rdi) | |
31 | movq %r13,32(%rdi) | |
32 | movq %r14,40(%rdi) | |
33 | movq %r15,48(%rdi) | |
34 | movq %rsi,56(%rdi) # Return address | |
35 | ret | |
36 | ||
37 | .size setjmp,.-setjmp | |
38 | ||
39 | .text | |
40 | .align 4 | |
41 | .globl longjmp | |
42 | .type longjmp, @function | |
43 | longjmp: | |
44 | movl %esi,%eax # Return value (int) | |
45 | movq (%rdi),%rbx | |
46 | movq 8(%rdi),%rsp | |
47 | movq 16(%rdi),%rbp | |
48 | movq 24(%rdi),%r12 | |
49 | movq 32(%rdi),%r13 | |
50 | movq 40(%rdi),%r14 | |
51 | movq 48(%rdi),%r15 | |
52 | jmp *56(%rdi) | |
53 | ||
54 | .size longjmp,.-longjmp |