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/* Copyright (C) 2011-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
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 <arch/abi.h>
#include "ucontext_i.h"
/* int getcontext (ucontext_t *ucp) */
.text
ENTRY (__getcontext)
FEEDBACK_ENTER(__getcontext)
/* Save the callee-saved GPRs. There's no need to save the
caller-saved GPRs since the eventual setcontext() or
swapcontext() will assume those registers are all dead.
Save value "1" to uc_flags to later recognize getcontext(). */
{ movei r11, 1; ADDI_PTR r10, r0, UC_FLAGS_OFFSET }
{ ST_PTR r10, r11; addli r10, r0, UC_REG(30) }
{ ST r10, r30; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r31; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r32; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r33; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r34; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r35; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r36; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r37; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r38; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r39; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r40; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r41; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r42; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r43; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r44; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r45; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r46; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r47; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r48; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r49; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r50; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r51; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r52; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, tp; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, sp; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, lr; ADDI_PTR r10, r10, REGSIZE }
lnk r11 /* Point PC at the "jrp lr" instruction. */
addli r11, r11, .Lreturn - .
{ ST r10, r11; ADDI_PTR r10, r10, REGSIZE }
mfspr r11, INTERRUPT_CRITICAL_SECTION
{
ST r10, r11
movei r1, 0
}
/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG / 8) */
{
movei r3, _NSIG / 8
addli r2, r0, UC_SIGMASK_OFFSET
}
{
movei r0, SIG_BLOCK
moveli TREG_SYSCALL_NR_NAME, __NR_rt_sigprocmask
}
swint1
BNEZ r1, .Lsyscall_error
.Lreturn:
{
movei r0, 0
jrp lr
}
.Lsyscall_error:
j SYSCALL_ERROR_NAME
END (__getcontext)
.hidden __getcontext
weak_alias (__getcontext, getcontext)
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