mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-31 22:10:34 +03:00
95 lines
2.7 KiB
ArmAsm
95 lines
2.7 KiB
ArmAsm
/* Install given context.
|
|
Copyright (C) 2012-2017 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"
|
|
|
|
ENTRY(__setcontext)
|
|
/* Load address of the context data structure. */
|
|
move.l 4(%sp), %a0
|
|
|
|
/* Get the current signal mask. Note that we preserve D2/D3 in case
|
|
the system call fails and we return from the function with an
|
|
error. */
|
|
move.l %d3, -(%sp)
|
|
cfi_adjust_cfa_offset (4)
|
|
cfi_rel_offset (%d3, 0)
|
|
move.l %d2, -(%sp)
|
|
cfi_adjust_cfa_offset (4)
|
|
cfi_rel_offset (%d2, 0)
|
|
clr.l %d3
|
|
lea oSIGMASK(%a0), %a1
|
|
move.l %a1, %d2
|
|
move.l #SIG_SETMASK, %d1
|
|
move.l #__NR_sigprocmask, %d0
|
|
trap #0
|
|
cmp.l #-4095, %d0 /* Check %d0 for error. */
|
|
jcs 0f
|
|
move.l (%sp)+, %d2
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (d2)
|
|
move.l (%sp)+, %d3
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (d3)
|
|
jra SYSCALL_ERROR_LABEL /* Jump to error handler if error. */
|
|
|
|
0: /* Load the new stack pointer. */
|
|
move.l oSP(%a0), %sp
|
|
cfi_def_cfa (%a0, 0)
|
|
cfi_offset (%d2, oGREGS+2*4)
|
|
cfi_offset (%d3, oGREGS+3*4)
|
|
cfi_offset (%d4, oGREGS+4*4)
|
|
cfi_offset (%d5, oGREGS+5*4)
|
|
cfi_offset (%d6, oGREGS+6*4)
|
|
cfi_offset (%d7, oGREGS+7*4)
|
|
cfi_offset (%a2, oGREGS+10*4)
|
|
cfi_offset (%a3, oGREGS+11*4)
|
|
cfi_offset (%a4, oGREGS+12*4)
|
|
cfi_offset (%a5, oGREGS+13*4)
|
|
cfi_offset (%a6, oGREGS+14*4)
|
|
cfi_offset (%fp2, oFP2+0*12)
|
|
cfi_offset (%fp3, oFP2+1*12)
|
|
cfi_offset (%fp4, oFP2+2*12)
|
|
cfi_offset (%fp5, oFP2+3*12)
|
|
cfi_offset (%fp6, oFP2+4*12)
|
|
cfi_offset (%fp7, oFP2+5*12)
|
|
cfi_offset (%pc, oPC)
|
|
|
|
/* Load the values of all the preserved registers (except SP). */
|
|
movem.l oGREGS+2*4(%a0), %d2-%d7
|
|
movem.l oGREGS+10*4(%a0), %a2-%a6
|
|
fmovem.l oFPREGS(%a0), %fpsr/%fpcr/%fpiar
|
|
fmovem.x oFP2(%a0), %fp2-%fp7
|
|
clr.l %d0
|
|
|
|
/* Fetch the address to return to. */
|
|
movl oPC(%a0), %a1
|
|
|
|
/* End FDE here, we fall into another context. */
|
|
cfi_endproc
|
|
cfi_startproc
|
|
cfi_register (%pc, %a1)
|
|
|
|
jmp (%a1)
|
|
|
|
cfi_offset (%pc, -4)
|
|
PSEUDO_END(__setcontext)
|
|
|
|
weak_alias (__setcontext, setcontext)
|