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/* Copyright (C) 1992, 1993 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <sysdeps/unix/sysdep.h>
#define ENTRY(name) \
.globl _##name; \
.align 2; \
_##name##:
#define PSEUDO(name, syscall_name, args) \
.text; \
.globl syscall_error; \
ENTRY (name) \
XCHG_##args
movl $SYS_##syscall_name, %eax; \
int $0x80; \
test %eax, %eax; \
jl syscall_error; \
XCHG_##args
/* Linux takes system call arguments in registers:
1: %ebx
2: %ecx
3: %edx
4: %esi
5: %edi
We put the arguments into registers from the stack,
and save the registers, by using the 386 `xchg' instruction
to swap the values in both directions. */
#define XCHG_0 /* No arguments to frob. */
#define XCHG_1 xchg 8(%esp), %ebx; XCHG_0
#define XCHG_2 xchg 12(%esp), %ecx; XCHG_1
#define XCHG_3 xchg 16(%esp), %edx; XCHG_2
#define XCHG_4 xchg 20(%esp), %esi; XCHG_3
#define XCHG_5 xchg 24(%esp), %edi; XCHG_3
#define r0 %eax /* Normal return-value register. */
#define r1 %edx /* Secondary return-value register. */
#define scratch %ecx /* Call-clobbered register for random use. */
#define MOVE(x,y) movl x, y
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