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48 lines
1.5 KiB
ArmAsm
48 lines
1.5 KiB
ArmAsm
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/* Copyright (C) 1995, 1996 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sysdep.h>
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/* Please consult the file sysdeps/unix/sysv/linux/arm/sysdep.h for
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more information about the value -4095 used below.*/
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.text
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ENTRY (syscall)
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/* Normally encoding the system call number in the instruction is
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good. But we pay the price here. */
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sub sp, sp, $0xc @ get 3 words on the stack
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orr r0, r0, $0xef000000 @ make up a SWI instruction
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orr r0, r0, $SWI_BASE
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str r0, [sp]
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ldr r0, _reti
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str r0, [sp, $4]
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adr r0, _ret
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str r0, [sp, $8]
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mov r0, r1
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mov r1, r2
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mov r2, r3
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mov pc, sp
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_ret: add sp, sp, $0xc
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RETINSTR(mov, pc, r14)
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_reti: .word 0xe51ff004 @ ldr pc, [pc, $4]
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PSEUDO_END (syscall)
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