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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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#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 <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 ret_ERRVAL ret
#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: 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: 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__ */
/* Define a macro which expands into the inline wrapper code for a system
call. */
#undef INLINE_SYSCALL
#define INLINE_SYSCALL(name, nr, args...) \
({ INTERNAL_SYSCALL_DECL(err); \
long result_var = INTERNAL_SYSCALL (name, err, nr, args); \
if ( INTERNAL_SYSCALL_ERROR_P (result_var, err) ) \
{ \
__set_errno (INTERNAL_SYSCALL_ERRNO (result_var, err)); \
result_var = -1L; \
} \
result_var; })
#undef INTERNAL_SYSCALL_DECL
#define INTERNAL_SYSCALL_DECL(err) long err
#undef INTERNAL_SYSCALL_ERROR_P
#define INTERNAL_SYSCALL_ERROR_P(val, err) ((long) (err))
#undef INTERNAL_SYSCALL_ERRNO
#define INTERNAL_SYSCALL_ERRNO(val, err) (val)
#undef INTERNAL_SYSCALL
#define INTERNAL_SYSCALL(name, err, nr, args...) \
internal_syscall##nr (, "li\t$2, %2\t\t\t# " #name "\n\t", \
"i" (SYS_ify (name)), err, args)
#undef INTERNAL_SYSCALL_NCS
#define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \
internal_syscall##nr (= number, , "r" (__v0), err, args)
#undef internal_syscall0
#define internal_syscall0(ncs_init, cs_init, input, err, dummy...) \
({ \
long _sys_result; \
\
{ \
register long __v0 __asm__("$2") ncs_init; \
register long __a3 __asm__("$7"); \
__asm__ volatile ( \
".set\tnoreorder\n\t" \
cs_init \
"syscall\n\t" \
".set reorder" \
: "=r" (__v0), "=r" (__a3) \
: input \
: __SYSCALL_CLOBBERS); \
err = __a3; \
_sys_result = __v0; \
} \
_sys_result; \
})
#undef internal_syscall1
#define internal_syscall1(ncs_init, cs_init, input, err, arg1) \
({ \
long _sys_result; \
\
{ \
register long __v0 __asm__("$2") ncs_init; \
register long __a0 __asm__("$4") = (long) arg1; \
register long __a3 __asm__("$7"); \
__asm__ volatile ( \
".set\tnoreorder\n\t" \
cs_init \
"syscall\n\t" \
".set reorder" \
: "=r" (__v0), "=r" (__a3) \
: input, "r" (__a0) \
: __SYSCALL_CLOBBERS); \
err = __a3; \
_sys_result = __v0; \
} \
_sys_result; \
})
#undef internal_syscall2
#define internal_syscall2(ncs_init, cs_init, input, err, arg1, arg2) \
({ \
long _sys_result; \
\
{ \
register long __v0 __asm__("$2") ncs_init; \
register long __a0 __asm__("$4") = (long) arg1; \
register long __a1 __asm__("$5") = (long) arg2; \
register long __a3 __asm__("$7"); \
__asm__ volatile ( \
".set\tnoreorder\n\t" \
cs_init \
"syscall\n\t" \
".set\treorder" \
: "=r" (__v0), "=r" (__a3) \
: input, "r" (__a0), "r" (__a1) \
: __SYSCALL_CLOBBERS); \
err = __a3; \
_sys_result = __v0; \
} \
_sys_result; \
})
#undef internal_syscall3
#define internal_syscall3(ncs_init, cs_init, input, err, arg1, arg2, arg3)\
({ \
long _sys_result; \
\
{ \
register long __v0 __asm__("$2") ncs_init; \
register long __a0 __asm__("$4") = (long) arg1; \
register long __a1 __asm__("$5") = (long) arg2; \
register long __a2 __asm__("$6") = (long) arg3; \
register long __a3 __asm__("$7"); \
__asm__ volatile ( \
".set\tnoreorder\n\t" \
cs_init \
"syscall\n\t" \
".set\treorder" \
: "=r" (__v0), "=r" (__a3) \
: input, "r" (__a0), "r" (__a1), "r" (__a2) \
: __SYSCALL_CLOBBERS); \
err = __a3; \
_sys_result = __v0; \
} \
_sys_result; \
})
#undef internal_syscall4
#define internal_syscall4(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4)\
({ \
long _sys_result; \
\
{ \
register long __v0 __asm__("$2") ncs_init; \
register long __a0 __asm__("$4") = (long) arg1; \
register long __a1 __asm__("$5") = (long) arg2; \
register long __a2 __asm__("$6") = (long) arg3; \
register long __a3 __asm__("$7") = (long) arg4; \
__asm__ volatile ( \
".set\tnoreorder\n\t" \
cs_init \
"syscall\n\t" \
".set\treorder" \
: "=r" (__v0), "+r" (__a3) \
: input, "r" (__a0), "r" (__a1), "r" (__a2) \
: __SYSCALL_CLOBBERS); \
err = __a3; \
_sys_result = __v0; \
} \
_sys_result; \
})
/* We need to use a frame pointer for the functions in which we
adjust $sp around the syscall, or debug information and unwind
information will be $sp relative and thus wrong during the syscall. As
of GCC 3.4.3, this is sufficient. */
#define FORCE_FRAME_POINTER alloca (4)
#undef internal_syscall5
#define internal_syscall5(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5)\
({ \
long _sys_result; \
\
FORCE_FRAME_POINTER; \
{ \
register long __v0 __asm__("$2") ncs_init; \
register long __a0 __asm__("$4") = (long) arg1; \
register long __a1 __asm__("$5") = (long) arg2; \
register long __a2 __asm__("$6") = (long) arg3; \
register long __a3 __asm__("$7") = (long) arg4; \
__asm__ volatile ( \
".set\tnoreorder\n\t" \
"subu\t$29, 32\n\t" \
"sw\t%6, 16($29)\n\t" \
cs_init \
"syscall\n\t" \
"addiu\t$29, 32\n\t" \
".set\treorder" \
: "=r" (__v0), "+r" (__a3) \
: input, "r" (__a0), "r" (__a1), "r" (__a2), \
"r" ((long)arg5) \
: __SYSCALL_CLOBBERS); \
err = __a3; \
_sys_result = __v0; \
} \
_sys_result; \
})
#undef internal_syscall6
#define internal_syscall6(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5, arg6)\
({ \
long _sys_result; \
\
FORCE_FRAME_POINTER; \
{ \
register long __v0 __asm__("$2") ncs_init; \
register long __a0 __asm__("$4") = (long) arg1; \
register long __a1 __asm__("$5") = (long) arg2; \
register long __a2 __asm__("$6") = (long) arg3; \
register long __a3 __asm__("$7") = (long) arg4; \
__asm__ volatile ( \
".set\tnoreorder\n\t" \
"subu\t$29, 32\n\t" \
"sw\t%6, 16($29)\n\t" \
"sw\t%7, 20($29)\n\t" \
cs_init \
"syscall\n\t" \
"addiu\t$29, 32\n\t" \
".set\treorder" \
: "=r" (__v0), "+r" (__a3) \
: input, "r" (__a0), "r" (__a1), "r" (__a2), \
"r" ((long)arg5), "r" ((long)arg6) \
: __SYSCALL_CLOBBERS); \
err = __a3; \
_sys_result = __v0; \
} \
_sys_result; \
})
#undef internal_syscall7
#define internal_syscall7(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5, arg6, arg7)\
({ \
long _sys_result; \
\
FORCE_FRAME_POINTER; \
{ \
register long __v0 __asm__("$2") ncs_init; \
register long __a0 __asm__("$4") = (long) arg1; \
register long __a1 __asm__("$5") = (long) arg2; \
register long __a2 __asm__("$6") = (long) arg3; \
register long __a3 __asm__("$7") = (long) arg4; \
__asm__ volatile ( \
".set\tnoreorder\n\t" \
"subu\t$29, 32\n\t" \
"sw\t%6, 16($29)\n\t" \
"sw\t%7, 20($29)\n\t" \
"sw\t%8, 24($29)\n\t" \
cs_init \
"syscall\n\t" \
"addiu\t$29, 32\n\t" \
".set\treorder" \
: "=r" (__v0), "+r" (__a3) \
: input, "r" (__a0), "r" (__a1), "r" (__a2), \
"r" ((long)arg5), "r" ((long)arg6), "r" ((long)arg7) \
: __SYSCALL_CLOBBERS); \
err = __a3; \
_sys_result = __v0; \
} \
_sys_result; \
})
#undef __SYSCALL_CLOBBERS
#define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", \
"$14", "$15", "$24", "$25", "memory"
#endif /* __ASSEMBLER__ */
#endif /* _LINUX_MIPS_SYSDEP_H */
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