mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 14:30:06 +00:00
117 lines
3.5 KiB
ArmAsm
117 lines
3.5 KiB
ArmAsm
/* Copyright (C) 1997-2015 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 <stap-probe.h>
|
|
|
|
/* __longjmp(jmpbuf, val) */
|
|
|
|
ENTRY (__longjmp)
|
|
cfi_def_cfa(x0, 0)
|
|
cfi_offset(x19, JB_X19<<3)
|
|
cfi_offset(x20, JB_X20<<3)
|
|
cfi_offset(x21, JB_X21<<3)
|
|
cfi_offset(x22, JB_X22<<3)
|
|
cfi_offset(x23, JB_X23<<3)
|
|
cfi_offset(x24, JB_X24<<3)
|
|
cfi_offset(x25, JB_X25<<3)
|
|
cfi_offset(x26, JB_X26<<3)
|
|
cfi_offset(x27, JB_X27<<3)
|
|
cfi_offset(x28, JB_X28<<3)
|
|
cfi_offset(x29, JB_X29<<3)
|
|
cfi_offset(x30, JB_LR<<3)
|
|
|
|
cfi_offset( d8, JB_D8<<3)
|
|
cfi_offset( d9, JB_D9<<3)
|
|
cfi_offset(d10, JB_D10<<3)
|
|
cfi_offset(d11, JB_D11<<3)
|
|
cfi_offset(d12, JB_D12<<3)
|
|
cfi_offset(d13, JB_D13<<3)
|
|
cfi_offset(d14, JB_D14<<3)
|
|
cfi_offset(d15, JB_D15<<3)
|
|
|
|
ldp x19, x20, [x0, #JB_X19<<3]
|
|
ldp x21, x22, [x0, #JB_X21<<3]
|
|
ldp x23, x24, [x0, #JB_X23<<3]
|
|
ldp x25, x26, [x0, #JB_X25<<3]
|
|
ldp x27, x28, [x0, #JB_X27<<3]
|
|
#ifdef PTR_DEMANGLE
|
|
ldp x29, x4, [x0, #JB_X29<<3]
|
|
PTR_DEMANGLE (x30, x4, x3, x2)
|
|
#else
|
|
ldp x29, x30, [x0, #JB_X29<<3]
|
|
#endif
|
|
/* longjmp probe takes 3 arguments, address of jump buffer as
|
|
first argument (8@x0), return value as second argument (-4@x1),
|
|
and target address (8@x30), respectively. */
|
|
LIBC_PROBE (longjmp, 3, 8@x0, -4@x1, 8@x30)
|
|
ldp d8, d9, [x0, #JB_D8<<3]
|
|
ldp d10, d11, [x0, #JB_D10<<3]
|
|
ldp d12, d13, [x0, #JB_D12<<3]
|
|
ldp d14, d15, [x0, #JB_D14<<3]
|
|
|
|
/* Originally this was implemented with a series of
|
|
.cfi_restore() directives.
|
|
|
|
The theory was that cfi_restore should revert to previous
|
|
frame value is the same as the current value. In practice
|
|
this doesn't work, even after cfi_restore() gdb continues
|
|
to try to recover a previous frame value offset from x0,
|
|
which gets stuffed after a few more instructions. The
|
|
cfi_same_value() mechanism appears to work fine. */
|
|
|
|
cfi_same_value(x19)
|
|
cfi_same_value(x20)
|
|
cfi_same_value(x21)
|
|
cfi_same_value(x22)
|
|
cfi_same_value(x23)
|
|
cfi_same_value(x24)
|
|
cfi_same_value(x25)
|
|
cfi_same_value(x26)
|
|
cfi_same_value(x27)
|
|
cfi_same_value(x28)
|
|
cfi_same_value(x29)
|
|
cfi_same_value(x30)
|
|
cfi_same_value(d8)
|
|
cfi_same_value(d9)
|
|
cfi_same_value(d10)
|
|
cfi_same_value(d11)
|
|
cfi_same_value(d12)
|
|
cfi_same_value(d13)
|
|
cfi_same_value(d14)
|
|
cfi_same_value(d15)
|
|
#ifdef PTR_DEMANGLE
|
|
ldr x4, [x0, #JB_SP<<3]
|
|
PTR_DEMANGLE (x5, x4, x3, x2)
|
|
#else
|
|
ldr x5, [x0, #JB_SP<<3]
|
|
#endif
|
|
mov sp, x5
|
|
|
|
/* longjmp_target probe takes 3 arguments, address of jump buffer
|
|
as first argument (8@x0), return value as second argument (-4@x1),
|
|
and target address (8@x30), respectively. */
|
|
LIBC_PROBE (longjmp_target, 3, 8@x0, -4@x1, 8@x30)
|
|
cmp x1, #0
|
|
mov x0, #1
|
|
csel x0, x1, x0, ne
|
|
/* Use br instead of ret because ret is guaranteed to mispredict */
|
|
br x30
|
|
END (__longjmp)
|