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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/* Copyright (C) 2001-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <jmpbuf-offsets.h>
#include <asm-syntax.h>
#include <stap-probe.h>
/* Jump to the position specified by ENV, causing the
setjmp call there to return VAL, or 1 if VAL is 0.
void __longjmp (__jmp_buf env, int val). */
.text
ENTRY(__longjmp)
/* Restore registers. */
mov (JB_RSP*8)(%rdi),%R8_LP
mov (JB_RBP*8)(%rdi),%R9_LP
mov (JB_PC*8)(%rdi),%RDX_LP
#ifdef PTR_DEMANGLE
PTR_DEMANGLE (%R8_LP)
PTR_DEMANGLE (%R9_LP)
PTR_DEMANGLE (%RDX_LP)
# ifdef __ILP32__
/* We ignored the high bits of the %rbp value because only the low
bits are mangled. But we cannot presume that %rbp is being used
as a pointer and truncate it, so recover the high bits. */
movl (JB_RBP*8 + 4)(%rdi), %eax
shlq $32, %rax
orq %rax, %r9
# endif
#endif
LIBC_PROBE (longjmp, 3, LP_SIZE@%RDI_LP, -4@%esi, LP_SIZE@%RDX_LP)
/* We add unwind information for the target here. */
cfi_def_cfa(%rdi, 0)
cfi_register(%rsp,%r8)
cfi_register(%rbp,%r9)
cfi_register(%rip,%rdx)
cfi_offset(%rbx,JB_RBX*8)
cfi_offset(%r12,JB_R12*8)
cfi_offset(%r13,JB_R13*8)
cfi_offset(%r14,JB_R14*8)
cfi_offset(%r15,JB_R15*8)
movq (JB_RBX*8)(%rdi),%rbx
movq (JB_R12*8)(%rdi),%r12
movq (JB_R13*8)(%rdi),%r13
movq (JB_R14*8)(%rdi),%r14
movq (JB_R15*8)(%rdi),%r15
/* Set return value for setjmp. */
mov %esi, %eax
mov %R8_LP,%RSP_LP
movq %r9,%rbp
LIBC_PROBE (longjmp_target, 3,
LP_SIZE@%RDI_LP, -4@%eax, LP_SIZE@%RDX_LP)
jmpq *%rdx
END (__longjmp)
|
