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/* Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002
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 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. */
/* Alan Modra <amodra@bigpond.net.au> rewrote the INLINE_SYSCALL macro */
#ifndef _LINUX_POWERPC_SYSDEP_H
#define _LINUX_POWERPC_SYSDEP_H 1
#include <sysdeps/unix/powerpc/sysdep.h>
/* Define __set_errno() for INLINE_SYSCALL macro below. */
#ifndef __ASSEMBLER__
#include <errno.h>
#endif
/* 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__
/* This seems to always be the case on PPC. */
#define ALIGNARG(log2) log2
/* For ELF we need the `.type' directive to make shared libs work right. */
#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
#endif /* __ASSEMBLER__ */
#undef INLINE_SYSCALL
#if 1
#define INLINE_SYSCALL(name, nr, args...) \
({ \
DECLARGS_##nr; \
long ret, err; \
LOADARGS_##nr(name, args); \
__asm __volatile ("sc\n\t" \
"mfcr %1\n\t" \
: "=r" (r3), "=r" (err) \
: ASM_INPUT_##nr \
: "cc", "memory"); \
ret = r3; \
if (err & 1 << 28) \
{ \
__set_errno (ret); \
ret = -1L; \
} \
ret; \
})
#define DECLARGS_0 register long r0 __asm__ ("r0"); \
register long r3 __asm__ ("r3")
#define DECLARGS_1 DECLARGS_0
#define DECLARGS_2 DECLARGS_1; register long r4 __asm__ ("r4")
#define DECLARGS_3 DECLARGS_2; register long r5 __asm__ ("r5")
#define DECLARGS_4 DECLARGS_3; register long r6 __asm__ ("r6")
#define DECLARGS_5 DECLARGS_4; register long r7 __asm__ ("r7")
#define DECLARGS_6 DECLARGS_5; register long r8 __asm__ ("r8")
#define LOADARGS_0(name) \
r0 = __NR_##name
#define LOADARGS_1(name, arg1) \
LOADARGS_0(name); \
r3 = (long) (arg1)
#define LOADARGS_2(name, arg1, arg2) \
LOADARGS_1(name, arg1); \
r4 = (long) (arg2)
#define LOADARGS_3(name, arg1, arg2, arg3) \
LOADARGS_2(name, arg1, arg2); \
r5 = (long) (arg3)
#define LOADARGS_4(name, arg1, arg2, arg3, arg4) \
LOADARGS_3(name, arg1, arg2, arg3); \
r6 = (long) (arg4)
#define LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5) \
LOADARGS_4(name, arg1, arg2, arg3, arg4); \
r7 = (long) (arg5)
#define LOADARGS_6(name, arg1, arg2, arg3, arg4, arg5, arg6) \
LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5); \
r8 = (long) (arg6)
#define ASM_INPUT_0 "r" (r0)
#define ASM_INPUT_1 ASM_INPUT_0, "0" (r3)
#define ASM_INPUT_2 ASM_INPUT_1, "r" (r4)
#define ASM_INPUT_3 ASM_INPUT_2, "r" (r5)
#define ASM_INPUT_4 ASM_INPUT_3, "r" (r6)
#define ASM_INPUT_5 ASM_INPUT_4, "r" (r7)
#define ASM_INPUT_6 ASM_INPUT_5, "r" (r8)
#else
/* This version is for kernels that implement system calls that
behave like function calls as far as register saving. */
#define INLINE_SYSCALL(name, nr, args...) \
({ \
register long r0 __asm__ ("r0"); \
register long r3 __asm__ ("r3"); \
register long r4 __asm__ ("r4"); \
register long r5 __asm__ ("r5"); \
register long r6 __asm__ ("r6"); \
register long r7 __asm__ ("r7"); \
register long r8 __asm__ ("r8"); \
long ret, err; \
LOADARGS_##nr(name, args); \
__asm __volatile ("sc\n\t" \
"mfcr %7\n\t" \
: "=r" (r0), "=r" (r3), "=r" (r4), \
"=r" (r5), "=r" (r6), "=r" (r7), \
"=r" (r8), "=r" (err) \
: ASM_INPUT_##nr \
: "r9", "r10", "r11", "r12", \
"fr0", "fr1", "fr2", "fr3", \
"fr4", "fr5", "fr6", "fr7", \
"fr8", "fr9", "fr10", "fr11", \
"fr12", "fr13", \
"ctr", "lr", \
"cr0", "cr1", "cr5", "cr6", "cr7", \
"memory"); \
ret = r3; \
if (err & 1 << 28) \
{ \
__set_errno (ret); \
ret = -1L; \
} \
ret; \
})
#define LOADARGS_0(name) \
r0 = __NR_##name
#define LOADARGS_1(name, arg1) \
LOADARGS_0(name); \
r3 = (long) (arg1)
#define LOADARGS_2(name, arg1, arg2) \
LOADARGS_1(name, arg1); \
r4 = (long) (arg2)
#define LOADARGS_3(name, arg1, arg2, arg3) \
LOADARGS_2(name, arg1, arg2); \
r5 = (long) (arg3)
#define LOADARGS_4(name, arg1, arg2, arg3, arg4) \
LOADARGS_3(name, arg1, arg2, arg3); \
r6 = (long) (arg4)
#define LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5) \
LOADARGS_4(name, arg1, arg2, arg3, arg4); \
r7 = (long) (arg5)
#define LOADARGS_6(name, arg1, arg2, arg3, arg4, arg5, arg6) \
LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5); \
r8 = (long) (arg6)
#define ASM_INPUT_0 "0" (r0)
#define ASM_INPUT_1 ASM_INPUT_0, "1" (r3)
#define ASM_INPUT_2 ASM_INPUT_1, "2" (r4)
#define ASM_INPUT_3 ASM_INPUT_2, "3" (r5)
#define ASM_INPUT_4 ASM_INPUT_3, "4" (r6)
#define ASM_INPUT_5 ASM_INPUT_4, "5" (r7)
#define ASM_INPUT_6 ASM_INPUT_5, "6" (r8)
#endif
#endif /* linux/powerpc/powerpc64/sysdep.h */
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