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/* Copyright (C) 1992,97,98,99,2000,01,02,03 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. */
#ifndef _LINUX_POWERPC_SYSDEP_H
#define _LINUX_POWERPC_SYSDEP_H 1
#include <sysdeps/unix/powerpc/sysdep.h>
/* Some systen calls got renamed over time, but retained the same semantics.
Handle them here so they can be catched by both C and assembler stubs in
glibc. */
#ifdef __NR_pread64
# ifdef __NR_pread
# error "__NR_pread and __NR_pread64 both defined???"
# endif
# define __NR_pread __NR_pread64
#endif
#ifdef __NR_pwrite64
# ifdef __NR_pwrite
# error "__NR_pwrite and __NR_pwrite64 both defined???"
# endif
# define __NR_pwrite __NR_pwrite64
#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
#ifndef __ASSEMBLER__
# include <errno.h>
# undef INLINE_SYSCALL
# define INLINE_SYSCALL(name, nr, args...) \
({ \
INTERNAL_SYSCALL_DECL (sc_err); \
long sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, args); \
if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
{ \
__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
sc_ret = -1L; \
} \
sc_ret; \
})
/* Define a macro which expands inline into the wrapper code for a system
call. This use is for internal calls that do not need to handle errors
normally. It will never touch errno.
On powerpc a system call basically clobbers the same registers like a
function call, with the exception of LR (which is needed for the
"sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
an error return status). */
# undef INTERNAL_SYSCALL_DECL
# define INTERNAL_SYSCALL_DECL(err) long err
# undef INTERNAL_SYSCALL
# define INTERNAL_SYSCALL(name, err, 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"); \
register long r9 __asm__ ("r9"); \
register long r10 __asm__ ("r10"); \
register long r11 __asm__ ("r11"); \
register long r12 __asm__ ("r12"); \
LOADARGS_##nr(name, args); \
__asm__ __volatile__ \
("sc \n\t" \
"mfcr %0" \
: "=&r" (r0), \
"=&r" (r3), "=&r" (r4), "=&r" (r5), "=&r" (r6), "=&r" (r7), \
"=&r" (r8), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12) \
: ASM_INPUT_##nr \
: "cr0", "ctr", "memory"); \
err = r0; \
(int) r3; \
})
# undef INTERNAL_SYSCALL_ERROR_P
# define INTERNAL_SYSCALL_ERROR_P(val, err) \
(__builtin_expect (err & (1 << 28), 0))
# undef INTERNAL_SYSCALL_ERRNO
# define INTERNAL_SYSCALL_ERRNO(val, err) (val)
# define LOADARGS_0(name, dummy) \
r0 = __NR_##name
# define LOADARGS_1(name, arg1) \
LOADARGS_0(name, 0); \
extern void __illegally_sized_syscall_##name##_arg1 (void); \
if (__builtin_classify_type (arg1) != 5 && sizeof (arg1) > 4) \
__illegally_sized_syscall_##name##_arg1 (); \
r3 = (long) (arg1)
# define LOADARGS_2(name, arg1, arg2) \
LOADARGS_1(name, arg1); \
extern void __illegally_sized_syscall_##name##_arg2 (void); \
if (__builtin_classify_type (arg2) != 5 && sizeof (arg2) > 4) \
__illegally_sized_syscall_##name##_arg2 (); \
r4 = (long) (arg2)
# define LOADARGS_3(name, arg1, arg2, arg3) \
LOADARGS_2(name, arg1, arg2); \
extern void __illegally_sized_syscall_##name##_arg3 (void); \
if (__builtin_classify_type (arg3) != 5 && sizeof (arg3) > 4) \
__illegally_sized_syscall_##name##_arg3 (); \
r5 = (long) (arg3)
# define LOADARGS_4(name, arg1, arg2, arg3, arg4) \
LOADARGS_3(name, arg1, arg2, arg3); \
extern void __illegally_sized_syscall_##name##_arg4 (void); \
if (__builtin_classify_type (arg4) != 5 && sizeof (arg4) > 4) \
__illegally_sized_syscall_##name##_arg4 (); \
r6 = (long) (arg4)
# define LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5) \
LOADARGS_4(name, arg1, arg2, arg3, arg4); \
extern void __illegally_sized_syscall_##name##_arg5 (void); \
if (__builtin_classify_type (arg5) != 5 && sizeof (arg5) > 4) \
__illegally_sized_syscall_##name##_arg5 (); \
r7 = (long) (arg5)
# define LOADARGS_6(name, arg1, arg2, arg3, arg4, arg5, arg6) \
LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5); \
extern void __illegally_sized_syscall_##name##_arg6 (void); \
if (__builtin_classify_type (arg6) != 5 && sizeof (arg6) > 4) \
__illegally_sized_syscall_##name##_arg6 (); \
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 /* __ASSEMBLER__ */
#endif /* linux/powerpc/powerpc32/sysdep.h */
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