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96 lines
3.1 KiB
ArmAsm
96 lines
3.1 KiB
ArmAsm
/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
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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 <arch/abi.h>
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#include "ucontext_i.h"
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/* int getcontext (ucontext_t *ucp) */
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.text
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ENTRY (__getcontext)
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FEEDBACK_ENTER(__getcontext)
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/* Save the callee-saved GPRs. There's no need to save the
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caller-saved GPRs since the eventual setcontext() or
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swapcontext() will assume those registers are all dead.
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Save value "1" to uc_flags to later recognize getcontext(). */
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{ movei r11, 1; ADDI_PTR r10, r0, UC_FLAGS_OFFSET }
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{ ST_PTR r10, r11; addli r10, r0, UC_REG(30) }
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{ ST r10, r30; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r31; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r32; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r33; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r34; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r35; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r36; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r37; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r38; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r39; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r40; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r41; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r42; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r43; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r44; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r45; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r46; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r47; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r48; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r49; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r50; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r51; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, r52; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, tp; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, sp; ADDI_PTR r10, r10, REGSIZE }
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{ ST r10, lr; ADDI_PTR r10, r10, REGSIZE }
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lnk r11 /* Point PC at the "jrp lr" instruction. */
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addli r11, r11, .Lreturn - .
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{ ST r10, r11; ADDI_PTR r10, r10, REGSIZE }
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mfspr r11, INTERRUPT_CRITICAL_SECTION
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{
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ST r10, r11
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movei r1, 0
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}
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/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG / 8) */
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{
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movei r3, _NSIG / 8
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addli r2, r0, UC_SIGMASK_OFFSET
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}
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{
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movei r0, SIG_BLOCK
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moveli TREG_SYSCALL_NR_NAME, __NR_rt_sigprocmask
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}
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swint1
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BNEZ r1, .Lsyscall_error
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.Lreturn:
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{
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movei r0, 0
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jrp lr
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}
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.Lsyscall_error:
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j SYSCALL_ERROR_NAME
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END (__getcontext)
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.hidden __getcontext
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weak_alias (__getcontext, getcontext)
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