mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-27 12:15:39 +03:00
79 lines
1.8 KiB
ArmAsm
79 lines
1.8 KiB
ArmAsm
/* Save and set current context. C-SKY ABIV2 version.
|
|
Copyright (C) 2018-2025 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 <sysdep.h>
|
|
|
|
#include "ucontext_i.h"
|
|
|
|
/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
|
|
|
|
ENTRY (swapcontext)
|
|
/* Save params and lr. */
|
|
subi sp, 16
|
|
stw a0, (sp, 0)
|
|
stw a1, (sp, 4)
|
|
stw r15, (sp, 8)
|
|
|
|
/* Call getcontext. */
|
|
#ifdef __PIC__
|
|
grs t1, .Lgetpc1
|
|
.Lgetpc1:
|
|
lrw t0, .Lgetpc1@GOTPC
|
|
addu t1, t1, t0
|
|
lrw t0, __getcontext@GOT
|
|
ldr.w t0, (t1, t0 << 0)
|
|
jsr t0
|
|
#else /* !__PIC__ */
|
|
jsri __getcontext
|
|
#endif
|
|
|
|
mov a3, a0 /* Save return value. */
|
|
|
|
/* Restore params and lr. */
|
|
ldw a0, (sp, 0)
|
|
ldw a1, (sp, 4)
|
|
ldw r15, (sp, 8)
|
|
addi sp, 16
|
|
|
|
cmpnei a3, 0
|
|
bt error_exit
|
|
|
|
/* Fix up LR and the PC. */
|
|
stw sp, (a0, MCONTEXT_CSKY_SP)
|
|
stw r15, (a0, MCONTEXT_CSKY_LR)
|
|
stw r15, (a0, MCONTEXT_CSKY_PC)
|
|
|
|
/* Set setcontext's arg. */
|
|
mov a0, a1
|
|
|
|
#ifdef __PIC__
|
|
grs t1, .Lgetpc2
|
|
.Lgetpc2:
|
|
lrw a3, .Lgetpc2@GOTPC
|
|
addu t1, t1, a3
|
|
lrw a3, __setcontext@GOT
|
|
ldr.w a3, (t1, a3 << 0)
|
|
#else /* __PIC__ */
|
|
lrw a3, __setcontext
|
|
#endif /* __PIC__ */
|
|
jmp a3
|
|
|
|
error_exit:
|
|
jmp r15
|
|
END (swapcontext)
|