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95 lines
2.7 KiB
ArmAsm
95 lines
2.7 KiB
ArmAsm
/* Install given context.
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Copyright (C) 2012-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include "ucontext_i.h"
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ENTRY(__setcontext)
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/* Load address of the context data structure. */
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move.l 4(%sp), %a0
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/* Get the current signal mask. Note that we preserve D2/D3 in case
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the system call fails and we return from the function with an
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error. */
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move.l %d3, -(%sp)
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (%d3, 0)
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move.l %d2, -(%sp)
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (%d2, 0)
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clr.l %d3
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lea oSIGMASK(%a0), %a1
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move.l %a1, %d2
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move.l #SIG_SETMASK, %d1
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move.l #__NR_sigprocmask, %d0
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trap #0
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cmp.l #-4095, %d0 /* Check %d0 for error. */
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jcs 0f
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move.l (%sp)+, %d2
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cfi_adjust_cfa_offset (-4)
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cfi_restore (d2)
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move.l (%sp)+, %d3
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cfi_adjust_cfa_offset (-4)
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cfi_restore (d3)
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jra SYSCALL_ERROR_LABEL /* Jump to error handler if error. */
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0: /* Load the new stack pointer. */
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move.l oSP(%a0), %sp
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cfi_def_cfa (%a0, 0)
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cfi_offset (%d2, oGREGS+2*4)
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cfi_offset (%d3, oGREGS+3*4)
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cfi_offset (%d4, oGREGS+4*4)
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cfi_offset (%d5, oGREGS+5*4)
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cfi_offset (%d6, oGREGS+6*4)
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cfi_offset (%d7, oGREGS+7*4)
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cfi_offset (%a2, oGREGS+10*4)
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cfi_offset (%a3, oGREGS+11*4)
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cfi_offset (%a4, oGREGS+12*4)
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cfi_offset (%a5, oGREGS+13*4)
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cfi_offset (%a6, oGREGS+14*4)
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cfi_offset (%fp2, oFP2+0*12)
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cfi_offset (%fp3, oFP2+1*12)
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cfi_offset (%fp4, oFP2+2*12)
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cfi_offset (%fp5, oFP2+3*12)
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cfi_offset (%fp6, oFP2+4*12)
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cfi_offset (%fp7, oFP2+5*12)
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cfi_offset (%pc, oPC)
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/* Load the values of all the preserved registers (except SP). */
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movem.l oGREGS+2*4(%a0), %d2-%d7
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movem.l oGREGS+10*4(%a0), %a2-%a6
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fmovem.l oFPREGS(%a0), %fpsr/%fpcr/%fpiar
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fmovem.x oFP2(%a0), %fp2-%fp7
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clr.l %d0
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/* Fetch the address to return to. */
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movl oPC(%a0), %a1
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/* End FDE here, we fall into another context. */
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cfi_endproc
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cfi_startproc
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cfi_register (%pc, %a1)
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jmp (%a1)
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cfi_offset (%pc, -4)
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PSEUDO_END(__setcontext)
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weak_alias (__setcontext, setcontext)
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