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58 lines
1.8 KiB
ArmAsm
58 lines
1.8 KiB
ArmAsm
/* Cancellable syscall wrapper. Linux/x86_64 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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/* long int [rax] __syscall_cancel_arch (volatile int *cancelhandling [%rdi],
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__syscall_arg_t nr [%rsi],
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__syscall_arg_t arg1 [%rdx],
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__syscall_arg_t arg2 [%rcx],
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__syscall_arg_t arg3 [%r8],
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__syscall_arg_t arg4 [%r9],
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__syscall_arg_t arg5 [SP+8],
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__syscall_arg_t arg6 [SP+16]) */
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ENTRY (__syscall_cancel_arch)
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.globl __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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mov (%rdi),%eax
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testb $TCB_CANCELED_BITMASK, (%rdi)
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jne __syscall_do_cancel
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/* Issue a 6 argument syscall, the nr [%rax] being the syscall
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number. */
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mov %rdi,%r11
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mov %rsi,%rax
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mov %rdx,%rdi
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mov %rcx,%rsi
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mov %r8,%rdx
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mov %r9,%r10
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mov 8(%rsp),%r8
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mov 16(%rsp),%r9
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mov %r11,8(%rsp)
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syscall
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.globl __syscall_cancel_arch_end
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__syscall_cancel_arch_end:
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ret
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END (__syscall_cancel_arch)
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