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65 lines
1.9 KiB
ArmAsm
65 lines
1.9 KiB
ArmAsm
/* Save current context for ARC.
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Copyright (C) 2020-2025 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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<https://www.gnu.org/licenses/>. */
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#include "ucontext-macros.h"
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/* int getcontext (ucontext_t *ucp)
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Save machine context in @ucp and return 0 on success, -1 on error
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- saves callee saved registers only
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- layout mandated by uncontext_t:uc_mcontext (hence different from setjmp). */
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ENTRY (__getcontext)
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/* Callee saved registers. */
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add r2, r0, UCONTEXT_MCONTEXT
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STR (r13, r2, 37)
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STR (r14, r2, 36)
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STR (r15, r2, 35)
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STR (r16, r2, 34)
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STR (r17, r2, 33)
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STR (r18, r2, 32)
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STR (r19, r2, 31)
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STR (r20, r2, 30)
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STR (r21, r2, 29)
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STR (r22, r2, 28)
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STR (r23, r2, 27)
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STR (r24, r2, 26)
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STR (blink, r2, 7)
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STR (fp, r2, 8)
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STR (gp, r2, 9)
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STR (sp, r2, 23)
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/* Save 0 in r0 placeholder to return 0 when this @ucp activated. */
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mov r9, 0
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STR (r9, r2, 22)
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/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8). */
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mov r3, _NSIG8
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add r2, r0, UCONTEXT_SIGMASK
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mov r1, 0
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mov r0, SIG_BLOCK
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mov r8, __NR_rt_sigprocmask
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ARC_TRAP_INSN
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brhi r0, -1024, L (call_syscall_err)
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j.d [blink]
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mov r0, 0 /* Success, error handled in .Lcall_syscall_err. */
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PSEUDO_END (__getcontext)
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weak_alias (__getcontext, getcontext)
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