mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
95 lines
2.4 KiB
ArmAsm
95 lines
2.4 KiB
ArmAsm
/* Save and set 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 swapcontext (ucontext_t *oucp, const ucontext_t *ucp). */
|
|
|
|
ENTRY (__swapcontext)
|
|
|
|
/* Save context into @oucp pointed to by r0. */
|
|
|
|
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 @oucp activated. */
|
|
mov r9, 0
|
|
STR (r9, r2, 22)
|
|
|
|
/* Load context from @ucp. */
|
|
|
|
mov r9, r1 /* Safekeep @ucp across syscall. */
|
|
|
|
/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, _NSIG8) */
|
|
mov r3, _NSIG8
|
|
add r2, r0, UCONTEXT_SIGMASK
|
|
add r1, r1, UCONTEXT_SIGMASK
|
|
mov r0, SIG_SETMASK
|
|
mov r8, __NR_rt_sigprocmask
|
|
ARC_TRAP_INSN
|
|
brhi r0, -1024, L (call_syscall_err)
|
|
|
|
add r9, r9, UCONTEXT_MCONTEXT
|
|
LDR (r0, r9, 22)
|
|
LDR (r1, r9, 21)
|
|
LDR (r2, r9, 20)
|
|
LDR (r3, r9, 19)
|
|
LDR (r4, r9, 18)
|
|
LDR (r5, r9, 17)
|
|
LDR (r6, r9, 16)
|
|
LDR (r7, r9, 15)
|
|
|
|
LDR (r13, r9, 37)
|
|
LDR (r14, r9, 36)
|
|
LDR (r15, r9, 35)
|
|
LDR (r16, r9, 34)
|
|
LDR (r17, r9, 33)
|
|
LDR (r18, r9, 32)
|
|
LDR (r19, r9, 31)
|
|
LDR (r20, r9, 30)
|
|
LDR (r21, r9, 29)
|
|
LDR (r22, r9, 28)
|
|
LDR (r23, r9, 27)
|
|
LDR (r24, r9, 26)
|
|
|
|
LDR (blink, r9, 7)
|
|
LDR (fp, r9, 8)
|
|
LDR (gp, r9, 9)
|
|
LDR (sp, r9, 23)
|
|
|
|
j [blink]
|
|
|
|
PSEUDO_END (__swapcontext)
|
|
weak_alias (__swapcontext, swapcontext)
|