75eff3fe90
This patch moves the AArch64 port to the main sysdeps hierarchy. The move is essentially: git mv ports/sysdeps/aarch64 sysdeps/aarch64 git mv ports/sysdeps/unix/sysv/linux/aarch64 sysdeps/unix/sysv/linux/aarch64 The README is updated and I've updated ChangeLog.aarch64 along the lines of the ARM move. The AArch64 build has been tested to confirm that there were no changes in objdump -dr output or the shared objects.
107 lines
3 KiB
ArmAsm
107 lines
3 KiB
ArmAsm
/* Copyright (C) 1997-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <jmpbuf-offsets.h>
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/* __longjmp(jmpbuf, val) */
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ENTRY (__longjmp)
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cfi_def_cfa(x0, 0)
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cfi_offset(x19, JB_X19<<3)
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cfi_offset(x20, JB_X20<<3)
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cfi_offset(x21, JB_X21<<3)
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cfi_offset(x22, JB_X22<<3)
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cfi_offset(x23, JB_X23<<3)
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cfi_offset(x24, JB_X24<<3)
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cfi_offset(x25, JB_X25<<3)
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cfi_offset(x26, JB_X26<<3)
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cfi_offset(x27, JB_X27<<3)
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cfi_offset(x28, JB_X28<<3)
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cfi_offset(x29, JB_X29<<3)
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cfi_offset(x30, JB_LR<<3)
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cfi_offset( d8, JB_D8<<3)
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cfi_offset( d9, JB_D9<<3)
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cfi_offset(d10, JB_D10<<3)
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cfi_offset(d11, JB_D11<<3)
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cfi_offset(d12, JB_D12<<3)
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cfi_offset(d13, JB_D13<<3)
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cfi_offset(d14, JB_D14<<3)
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cfi_offset(d15, JB_D15<<3)
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ldp x19, x20, [x0, #JB_X19<<3]
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ldp x21, x22, [x0, #JB_X21<<3]
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ldp x23, x24, [x0, #JB_X23<<3]
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ldp x25, x26, [x0, #JB_X25<<3]
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ldp x27, x28, [x0, #JB_X27<<3]
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#ifdef PTR_DEMANGLE
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ldp x29, x4, [x0, #JB_X29<<3]
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PTR_DEMANGLE (x30, x4, x3, x2)
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#else
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ldp x29, x30, [x0, #JB_X29<<3]
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#endif
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ldp d8, d9, [x0, #JB_D8<<3]
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ldp d10, d11, [x0, #JB_D10<<3]
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ldp d12, d13, [x0, #JB_D12<<3]
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ldp d14, d15, [x0, #JB_D14<<3]
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/* Originally this was implemented with a series of
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.cfi_restore() directives.
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The theory was that cfi_restore should revert to previous
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frame value is the same as the current value. In practice
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this doesn't work, even after cfi_restore() gdb continues
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to try to recover a previous frame value offset from x0,
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which gets stuffed after a few more instructions. The
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cfi_same_value() mechanism appears to work fine. */
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cfi_same_value(x19)
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cfi_same_value(x20)
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cfi_same_value(x21)
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cfi_same_value(x22)
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cfi_same_value(x23)
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cfi_same_value(x24)
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cfi_same_value(x25)
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cfi_same_value(x26)
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cfi_same_value(x27)
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cfi_same_value(x28)
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cfi_same_value(x29)
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cfi_same_value(x30)
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cfi_same_value(d8)
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cfi_same_value(d9)
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cfi_same_value(d10)
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cfi_same_value(d11)
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cfi_same_value(d12)
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cfi_same_value(d13)
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cfi_same_value(d14)
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cfi_same_value(d15)
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#ifdef PTR_DEMANGLE
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ldr x4, [x0, #JB_SP<<3]
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PTR_DEMANGLE (x5, x4, x3, x2)
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#else
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ldr x5, [x0, #JB_SP<<3]
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#endif
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mov sp, x5
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cmp x1, #0
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mov x0, #1
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csel x0, x1, x0, ne
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/* Use br instead of ret because ret is guaranteed to mispredict */
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br x30
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END (__longjmp)
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