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64 lines
1.6 KiB
ArmAsm
64 lines
1.6 KiB
ArmAsm
/* Cancellable syscall wrapper. Linux/or1k version.
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Copyright (C) 2023-2025 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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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <descr-const.h>
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ENTRY (__syscall_cancel_arch)
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l.addi r1, r1, -4
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cfi_def_cfa_offset (4)
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l.sw 0(r1), r9
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cfi_offset (9, -4)
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.global __syscall_cancel_arch_start
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__syscall_cancel_arch_start:
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/* if (*cancelhandling & CANCELED_BITMASK)
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__syscall_do_cancel() */
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l.movhi r19, hi(0)
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l.lwz r17, 0(r3)
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l.andi r17, r17, 8
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l.sfeq r17, r19
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l.bnf 1f
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/* Issue a 6 argument syscall. */
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l.or r11, r4, r4
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l.or r3, r5, r5
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l.or r4, r6, r6
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l.or r5, r7, r7
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l.or r6, r8, r8
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l.lwz r7, 4(r1)
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l.lwz r8, 8(r1)
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l.sys 1
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l.nop
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.global __syscall_cancel_arch_end
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__syscall_cancel_arch_end:
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l.lwz r9, 0(r1)
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l.jr r9
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l.addi r1, r1, 4
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cfi_remember_state
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cfi_def_cfa_offset (0)
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cfi_restore (9)
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1:
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cfi_restore_state
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l.jal __syscall_do_cancel
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l.nop
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END (__syscall_cancel_arch)
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