mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 17:50:20 +00:00
218 lines
4.3 KiB
ArmAsm
218 lines
4.3 KiB
ArmAsm
/* Save current context and install the given one.
|
|
Copyright (C) 2005, 2009 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 "ucontext_i.h"
|
|
|
|
/* int __swapcontext (ucontext_t *ouc, const ucontext_t *uc); */
|
|
|
|
.text
|
|
.align 5
|
|
ENTRY(__swapcontext)
|
|
|
|
/* Return value of getcontext. R0 is the only register whose
|
|
value is not preserved. */
|
|
mov #0, r0
|
|
mov.l r0, @(oR0,r4)
|
|
mov.l r1, @(oR1,r4)
|
|
mov.l r2, @(oR2,r4)
|
|
mov.l r3, @(oR3,r4)
|
|
mov.l r4, @(oR4,r4)
|
|
mov.l r5, @(oR5,r4)
|
|
mov.l r6, @(oR6,r4)
|
|
mov.l r7, @(oR7,r4)
|
|
mov r4, r0
|
|
add #(oMACL+4), r0
|
|
sts.l macl, @-r0
|
|
sts.l mach, @-r0
|
|
stc.l gbr, @-r0
|
|
|
|
/* Save T flag to SR. */
|
|
movt r1
|
|
mov.l r1, @-r0
|
|
sts.l pr, @-r0
|
|
|
|
/* The return address of getcontext is the restart pc. */
|
|
sts.l pr, @-r0
|
|
|
|
mov.l r15, @-r0
|
|
mov.l r14, @-r0
|
|
mov.l r13, @-r0
|
|
mov.l r12, @-r0
|
|
mov.l r11, @-r0
|
|
mov.l r10, @-r0
|
|
mov.l r9, @-r0
|
|
mov.l r8, @-r0
|
|
|
|
#ifdef __SH_FPU_ANY__
|
|
mov r4, r0
|
|
/* We need 2 add instruction because oFPUL+4 >= 127. */
|
|
add #124,r0
|
|
add #(oFPUL+4-124),r0
|
|
sts.l fpul, @-r0
|
|
sts.l fpscr, @-r0
|
|
frchg
|
|
fmov.s fr15, @-r0
|
|
fmov.s fr14, @-r0
|
|
fmov.s fr13, @-r0
|
|
fmov.s fr12, @-r0
|
|
fmov.s fr11, @-r0
|
|
fmov.s fr10, @-r0
|
|
fmov.s fr9, @-r0
|
|
fmov.s fr8, @-r0
|
|
fmov.s fr7, @-r0
|
|
fmov.s fr6, @-r0
|
|
fmov.s fr5, @-r0
|
|
fmov.s fr4, @-r0
|
|
fmov.s fr3, @-r0
|
|
fmov.s fr2, @-r0
|
|
fmov.s fr1, @-r0
|
|
fmov.s fr0, @-r0
|
|
frchg
|
|
fmov.s fr15, @-r0
|
|
fmov.s fr14, @-r0
|
|
fmov.s fr13, @-r0
|
|
fmov.s fr12, @-r0
|
|
fmov.s fr11, @-r0
|
|
fmov.s fr10, @-r0
|
|
fmov.s fr9, @-r0
|
|
fmov.s fr8, @-r0
|
|
fmov.s fr7, @-r0
|
|
fmov.s fr6, @-r0
|
|
fmov.s fr5, @-r0
|
|
fmov.s fr4, @-r0
|
|
fmov.s fr3, @-r0
|
|
fmov.s fr2, @-r0
|
|
fmov.s fr1, @-r0
|
|
fmov.s fr0, @-r0
|
|
#endif /* __SH_FPU_ANY__ */
|
|
|
|
mov r5, r8
|
|
|
|
/* sigprocmask (SIG_SETMASK, &uc->uc_sigmask, &ouc->uc_sigmask). */
|
|
mov #oSIGMASK, r1
|
|
extu.b r1, r1
|
|
add r1, r5
|
|
mov r4, r6
|
|
add r1, r6
|
|
mov #SIG_SETMASK, r4
|
|
mov #+SYS_ify(sigprocmask), r3
|
|
trapa #0x13
|
|
mov r0, r1
|
|
mov #-12, r2
|
|
shad r2, r1
|
|
not r1, r1 // r1=0 means r0 = -1 to -4095
|
|
tst r1, r1 // i.e. error in linux
|
|
bf .Lswapcontext_restore
|
|
.Lsyscall_error:
|
|
SYSCALL_ERROR_HANDLER
|
|
.Lpseudo_end:
|
|
rts
|
|
nop
|
|
.Lswapcontext_restore:
|
|
#ifdef __SH_FPU_ANY__
|
|
mov r8, r0
|
|
add #(oFR0),r0
|
|
fmov.s @r0+, fr0
|
|
fmov.s @r0+, fr1
|
|
fmov.s @r0+, fr2
|
|
fmov.s @r0+, fr3
|
|
fmov.s @r0+, fr4
|
|
fmov.s @r0+, fr5
|
|
fmov.s @r0+, fr6
|
|
fmov.s @r0+, fr7
|
|
fmov.s @r0+, fr8
|
|
fmov.s @r0+, fr9
|
|
fmov.s @r0+, fr10
|
|
fmov.s @r0+, fr11
|
|
fmov.s @r0+, fr12
|
|
fmov.s @r0+, fr13
|
|
fmov.s @r0+, fr14
|
|
fmov.s @r0+, fr15
|
|
frchg
|
|
fmov.s @r0+, fr0
|
|
fmov.s @r0+, fr1
|
|
fmov.s @r0+, fr2
|
|
fmov.s @r0+, fr3
|
|
fmov.s @r0+, fr4
|
|
fmov.s @r0+, fr5
|
|
fmov.s @r0+, fr6
|
|
fmov.s @r0+, fr7
|
|
fmov.s @r0+, fr8
|
|
fmov.s @r0+, fr9
|
|
fmov.s @r0+, fr10
|
|
fmov.s @r0+, fr11
|
|
fmov.s @r0+, fr12
|
|
fmov.s @r0+, fr13
|
|
fmov.s @r0+, fr14
|
|
fmov.s @r0+, fr15
|
|
frchg
|
|
lds.l @r0+, fpscr
|
|
lds.l @r0+, fpul
|
|
#endif /* __SH_FPU_ANY__ */
|
|
|
|
mov r8, r0
|
|
add #(oPC), r0
|
|
mov.l @r0+, r2
|
|
lds.l @r0+, pr
|
|
|
|
/* Restore T frag. */
|
|
mov.l @r0+, r1
|
|
shlr r1
|
|
/* Skip GBR which is used for thread pointer. */
|
|
add #4, r0
|
|
|
|
lds.l @r0+, mach
|
|
lds.l @r0+, macl
|
|
|
|
mov r8, r0
|
|
add #(oR9), r0
|
|
mov.l @r0+, r9
|
|
mov.l @r0+, r10
|
|
mov.l @r0+, r11
|
|
mov.l @r0+, r12
|
|
mov.l @r0+, r13
|
|
mov.l @r0+, r14
|
|
mov.l @r0+, r15
|
|
|
|
mov r8, r0
|
|
mov.l @(oR0,r0), r1
|
|
mov.l r1, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r1, 0)
|
|
mov.l r2, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r2, 0)
|
|
|
|
mov.l @(oR1,r0), r1
|
|
mov.l @(oR2,r0), r2
|
|
mov.l @(oR3,r0), r3
|
|
mov.l @(oR4,r0), r4
|
|
mov.l @(oR5,r0), r5
|
|
mov.l @(oR6,r0), r6
|
|
mov.l @(oR7,r0), r7
|
|
mov.l @(oR8,r0), r8
|
|
mov.l @r15+, r0
|
|
jmp @r0
|
|
mov.l @r15+, r0
|
|
|
|
PSEUDO_END(__swapcontext)
|
|
|
|
weak_alias (__swapcontext, swapcontext)
|