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/* Copyright (C) 1992, 1995, 1997, 1999, 2000, 2002, 2003, 2004
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Brendan Kehoe (brendan@zen.org).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _LINUX_MIPS_SYSDEP_H
#define _LINUX_MIPS_SYSDEP_H 1
#include <sgidefs.h>
#include <common/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
#ifdef __STDC__
# define SYS_ify(syscall_name) __NR_##syscall_name
#else
# define SYS_ify(syscall_name) __NR_/**/syscall_name
#endif
#ifdef __ASSEMBLER__
#include <sys/regdef.h>
#define ENTRY(name) \
.globl name; \
.align 2; \
.ent name,0; \
name##:
#undef END
#define END(function) \
.end function; \
.size function,.-function
#define ret j ra ; nop
#undef PSEUDO_END
#define PSEUDO_END(sym) .end sym; .size sym,.-sym
#define PSEUDO_NOERRNO(name, syscall_name, args) \
.align 2; \
ENTRY(name) \
.set noreorder; \
li v0, SYS_ify(syscall_name); \
syscall
#undef PSEUDO_END_NOERRNO
#define PSEUDO_END_NOERRNO(sym) .end sym; .size sym,.-sym
#define ret_NOERRNO ret
#define PSEUDO_ERRVAL(name, syscall_name, args) \
.align 2; \
ENTRY(name) \
.set noreorder; \
li v0, SYS_ify(syscall_name); \
syscall
#undef PSEUDO_END_ERRVAL
#define PSEUDO_END_ERRVAL(sym) .end sym; .size sym,.-sym
#define r0 v0
#define r1 v1
/* The mips move insn is d,s. */
#define MOVE(x,y) move y , x
#if _MIPS_SIM == _ABIO32
# define L(label) $L ## label
#else
# define L(label) .L ## label
#endif
/* Note that while it's better structurally, going back to call __syscall_error
can make things confusing if you're debugging---it looks like it's jumping
backwards into the previous fn. */
#ifdef __PIC__
#define PSEUDO(name, syscall_name, args) \
.align 2; \
99: move a0, v0; \
la t9,__syscall_error; \
jr t9; \
ENTRY(name) \
.set noreorder; \
.cpload t9; \
li v0, SYS_ify(syscall_name); \
syscall; \
.set reorder; \
bne a3, zero, 99b; \
L(syse1):
#else
#define PSEUDO(name, syscall_name, args) \
.set noreorder; \
.align 2; \
99: move a0, v0; \
j __syscall_error; \
nop; \
ENTRY(name) \
.set noreorder; \
li v0, SYS_ify(syscall_name); \
syscall; \
.set reorder; \
bne a3, zero, 99b; \
L(syse1):
#endif
/* We don't want the label for the error handler to be visible in the symbol
table when we define it here. */
#ifdef __PIC__
# define SYSCALL_ERROR_LABEL 99b
#endif
#else /* ! __ASSEMBLER__ */
/* Pointer mangling is not yet supported for MIPS. */
#define PTR_MANGLE(var) (void) (var)
#define PTR_DEMANGLE(var) (void) (var)
#endif /* __ASSEMBLER__ */
#endif /* _LINUX_MIPS_SYSDEP_H */
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