1997-05-21 09:44:03 +08:00
|
|
|
/* Copyright (C) 1992, 93, 95, 96, 97 Free Software Foundation, Inc.
|
1997-05-22 10:18:07 +08:00
|
|
|
This file is part of the GNU C Library.
|
|
|
|
|
Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995.
|
|
|
|
|
ARM changes by Philip Blundell, <pjb27@cam.ac.uk>, May 1997.
|
1997-05-21 09:44:03 +08:00
|
|
|
|
1997-05-22 10:18:07 +08:00
|
|
|
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.
|
1997-05-21 09:44:03 +08:00
|
|
|
|
1997-05-22 10:18:07 +08:00
|
|
|
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.
|
1997-05-21 09:44:03 +08:00
|
|
|
|
1997-05-22 10:18:07 +08:00
|
|
|
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., 59 Temple Place - Suite 330,
|
|
|
|
|
Boston, MA 02111-1307, USA. */
|
1997-05-21 09:44:03 +08:00
|
|
|
|
|
|
|
|
#ifndef _LINUX_ARM_SYSDEP_H
|
|
|
|
|
#define _LINUX_ARM_SYSDEP_H 1
|
|
|
|
|
|
|
|
|
|
/* There is some commonality. */
|
|
|
|
|
#include <sysdeps/unix/arm/sysdep.h>
|
|
|
|
|
|
|
|
|
|
/* For Linux we can use the system call table in the header file
|
|
|
|
|
/usr/include/asm/unistd.h
|
|
|
|
|
of the kernel. But these symbols do not follow the SYS_* syntax
|
|
|
|
|
so we have to redefine the `SYS_ify' macro here. */
|
|
|
|
|
#undef SYS_ify
|
1997-11-13 08:19:24 +08:00
|
|
|
#define SWI_BASE (0x900000)
|
|
|
|
|
#define SYS_ify(syscall_name) (__NR_##syscall_name)
|
1997-05-21 09:44:03 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef ASSEMBLER
|
|
|
|
|
|
|
|
|
|
/* Linux uses a negative return value to indicate syscall errors,
|
|
|
|
|
unlike most Unices, which use the condition codes' carry flag.
|
|
|
|
|
|
|
|
|
|
Since version 2.1 the return value of a system call might be
|
|
|
|
|
negative even if the call succeeded. E.g., the `lseek' system call
|
|
|
|
|
might return a large offset. Therefore we must not anymore test
|
|
|
|
|
for < 0, but test for a real error by making sure the value in %eax
|
|
|
|
|
is a real error number. Linus said he will make sure the no syscall
|
|
|
|
|
returns a value in -1 .. -4095 as a valid result so we can savely
|
|
|
|
|
test with -4095. */
|
|
|
|
|
#undef PSEUDO
|
|
|
|
|
#define PSEUDO(name, syscall_name, args) \
|
|
|
|
|
.text; \
|
|
|
|
|
ENTRY (name) \
|
|
|
|
|
DO_CALL (args, syscall_name); \
|
|
|
|
|
cmn r0, $4096; \
|
|
|
|
|
bge syscall_error;
|
|
|
|
|
|
|
|
|
|
#undef PSEUDO_END
|
|
|
|
|
#define PSEUDO_END(name) \
|
|
|
|
|
SYSCALL_ERROR_HANDLER \
|
|
|
|
|
END (name)
|
|
|
|
|
|
|
|
|
|
#ifndef PIC
|
|
|
|
|
#define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
|
|
|
|
|
#else
|
1997-05-22 10:18:07 +08:00
|
|
|
#error Aiee
|
1997-05-21 09:44:03 +08:00
|
|
|
#endif /* PIC */
|
|
|
|
|
|
|
|
|
|
#undef DO_CALL
|
|
|
|
|
#define DO_CALL(args, syscall_name) \
|
1997-05-22 10:18:07 +08:00
|
|
|
swi SYS_ify (syscall_name);
|
1997-05-21 09:44:03 +08:00
|
|
|
|
|
|
|
|
#endif /* ASSEMBLER */
|
|
|
|
|
|
|
|
|
|
#endif /* linux/arm/sysdep.h */
|
