74 lines
2.0 KiB
ArmAsm
74 lines
2.0 KiB
ArmAsm
/* Save current context. C-SKY ABIV2 version.
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Copyright (C) 2018 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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/* int getcontext (ucontext_t *ucp) */
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ENTRY (__getcontext)
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/* No need to save r2-r7 or a0-a3. */
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mov t0, a0
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addi a0, MCONTEXT_CSKY_R4
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stm r4-r13, (a0) /* Save r4-r13. */
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stw sp, (t0, MCONTEXT_CSKY_SP) /* Save sp. */
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stw r15, (t0, MCONTEXT_CSKY_LR) /* Save lr. */
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stw r15, (t0, MCONTEXT_CSKY_PC) /* Return to PC. */
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addi a0, t0, MCONTEXT_CSKY_R16
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stm r16-r31, (a0) /* Save r16-r31. */
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movi a0, 0
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stw a0, (t0, MCONTEXT_CSKY_A0) /* Return zero. */
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subi sp, 8
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stw t0, (sp, 0) /* Save t0 after "save sp". */
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/* __sigprocmask (SIG_BLOCK, NULL, &(ucontext->uc_sigmask)) */
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movi a0, SIG_BLOCK
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movi a1, 0
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addi a2, t0, UCONTEXT_SIGMASK
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/* Do sigprocmask syscall. */
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#ifdef __PIC__
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subi sp, 8
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stw gb, (sp, 0)
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grs gb, .Lgetpc
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.Lgetpc:
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lrw a3, .Lgetpc@GOTPC
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addu gb, gb, a3
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lrw a3, __sigprocmask@PLT
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ldr.w a3, (gb, a3 << 0)
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jsr a3
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ldw gb, (sp, 0)
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addi sp, 8
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#else
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jsri __sigprocmask
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#endif
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ldw t0, (sp, 0)
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addi sp, 8
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/* Restore r15 for sigprocmask changes. */
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ldw r15, (t0, MCONTEXT_CSKY_LR)
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movi a0, 0 /* Return 0. */
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jmp r15
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END (__getcontext)
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weak_alias (__getcontext, getcontext)
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