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51 lines
1.5 KiB
ArmAsm
51 lines
1.5 KiB
ArmAsm
/* Out-of-line syscall stub for six-argument syscalls from C.
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Copyright (C) 2015-2024 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 <sysdep.h>
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/* %eax, %ecx, %edx and %esi contain the values expected by the kernel.
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%edi points to a structure with the values of %ebx, %edi and %ebp. */
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.hidden __libc_do_syscall
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ENTRY (__libc_do_syscall)
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pushl %ebx
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (ebx, 0)
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pushl %edi
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (edi, 0)
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pushl %ebp
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (ebp, 0)
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movl 0(%edi), %ebx
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movl 8(%edi), %ebp
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movl 4(%edi), %edi
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ENTER_KERNEL
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popl %ebp
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cfi_adjust_cfa_offset (-4)
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cfi_restore (ebp)
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popl %edi
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cfi_adjust_cfa_offset (-4)
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cfi_restore (edi)
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popl %ebx
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cfi_adjust_cfa_offset (-4)
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cfi_restore (ebx)
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ret
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END (__libc_do_syscall)
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