mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-05 03:01:05 +00:00
65 lines
1.9 KiB
ArmAsm
65 lines
1.9 KiB
ArmAsm
/* Save current context for ARC.
|
|
Copyright (C) 2020-2023 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include "ucontext-macros.h"
|
|
|
|
/* int getcontext (ucontext_t *ucp)
|
|
Save machine context in @ucp and return 0 on success, -1 on error
|
|
- saves callee saved registers only
|
|
- layout mandated by uncontext_t:uc_mcontext (hence different from setjmp). */
|
|
|
|
ENTRY (__getcontext)
|
|
|
|
/* Callee saved registers. */
|
|
add r2, r0, UCONTEXT_MCONTEXT
|
|
STR (r13, r2, 37)
|
|
STR (r14, r2, 36)
|
|
STR (r15, r2, 35)
|
|
STR (r16, r2, 34)
|
|
STR (r17, r2, 33)
|
|
STR (r18, r2, 32)
|
|
STR (r19, r2, 31)
|
|
STR (r20, r2, 30)
|
|
STR (r21, r2, 29)
|
|
STR (r22, r2, 28)
|
|
STR (r23, r2, 27)
|
|
STR (r24, r2, 26)
|
|
|
|
STR (blink, r2, 7)
|
|
STR (fp, r2, 8)
|
|
STR (gp, r2, 9)
|
|
STR (sp, r2, 23)
|
|
|
|
/* Save 0 in r0 placeholder to return 0 when this @ucp activated. */
|
|
mov r9, 0
|
|
STR (r9, r2, 22)
|
|
|
|
/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8). */
|
|
mov r3, _NSIG8
|
|
add r2, r0, UCONTEXT_SIGMASK
|
|
mov r1, 0
|
|
mov r0, SIG_BLOCK
|
|
mov r8, __NR_rt_sigprocmask
|
|
ARC_TRAP_INSN
|
|
brhi r0, -1024, L (call_syscall_err)
|
|
j.d [blink]
|
|
mov r0, 0 /* Success, error handled in .Lcall_syscall_err. */
|
|
|
|
PSEUDO_END (__getcontext)
|
|
weak_alias (__getcontext, getcontext)
|