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/* Copyright (C) 1992, 1993, 1995, 1996, 1997, 2002, 2003, 2004
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995.
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_ALPHA_SYSDEP_H
#define _LINUX_ALPHA_SYSDEP_H 1
#ifdef __ASSEMBLER__
#include <asm/pal.h>
#include <alpha/regdef.h>
#else
#include <stdint.h>
#endif
/* There is some commonality. */
#include <sysdeps/unix/alpha/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
/* Define some aliases to make automatic syscall generation work
properly. The SYS_* variants are for the benefit of the files in
sysdeps/unix. */
#define __NR_getpid __NR_getxpid
#define __NR_getuid __NR_getxuid
#define __NR_getgid __NR_getxgid
#define SYS_getpid __NR_getxpid
#define SYS_getuid __NR_getxuid
#define SYS_getgid __NR_getxgid
/*
* Some syscalls no Linux program should know about:
*/
#define __NR_osf_sigprocmask 48
#define __NR_osf_shmat 209
#define __NR_osf_getsysinfo 256
#define __NR_osf_setsysinfo 257
/* Help old kernel headers where particular syscalls are not available. */
#ifndef __NR_semtimedop
# define __NR_semtimedop 423
#endif
/* This is a kludge to make syscalls.list find these under the names
pread and pwrite, since some kernel headers define those names
and some define the *64 names for the same system calls. */
#if !defined __NR_pread && defined __NR_pread64
# define __NR_pread __NR_pread64
#endif
#if !defined __NR_pwrite && defined __NR_pwrite64
# define __NR_pwrite __NR_pwrite64
#endif
/*
* In order to get the hidden arguments for rt_sigaction set up
* properly, we need to call the assembly version. This shouldn't
* happen except for inside sigaction.c, where we handle this
* specially. Catch other uses and error.
*/
#undef INLINE_SYSCALL
#define INLINE_SYSCALL(name, nr, args...) \
({ \
extern char ChEcK[__NR_##name == __NR_rt_sigaction ? -1 : 1] \
__attribute__((unused)); \
INLINE_SYSCALL1(name, nr, args); \
})
#undef INTERNAL_SYSCALL
#define INTERNAL_SYSCALL(name, err_out, nr, args...) \
({ \
extern char ChEcK[__NR_##name == __NR_rt_sigaction ? -1 : 1] \
__attribute__((unused)); \
INTERNAL_SYSCALL1(name, err_out, nr, args); \
})
/* Pointer mangling support. Note that tls access is slow enough that
we don't deoptimize things by placing the pointer check value there. */
#if defined NOT_IN_libc && defined IS_IN_rtld
# ifdef __ASSEMBLER__
# define PTR_MANGLE(dst, src, tmp) \
ldah tmp, __pointer_chk_guard_local($29) !gprelhigh; \
ldq tmp, __pointer_chk_guard_local(tmp) !gprellow; \
xor src, tmp, dst
# define PTR_MANGLE2(dst, src, tmp) \
xor src, tmp, dst
# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp)
# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp)
# else
extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
# define PTR_MANGLE(var) \
(var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
# define PTR_DEMANGLE(var) PTR_MANGLE(var)
# endif
#elif defined PIC
# ifdef __ASSEMBLER__
# define PTR_MANGLE(dst, src, tmp) \
ldq tmp, __pointer_chk_guard; \
xor src, tmp, dst
# define PTR_MANGLE2(dst, src, tmp) \
xor src, tmp, dst
# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp)
# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp)
# else
extern uintptr_t __pointer_chk_guard attribute_relro;
# define PTR_MANGLE(var) \
(var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard)
# define PTR_DEMANGLE(var) PTR_MANGLE(var)
# endif
#endif
#endif /* _LINUX_ALPHA_SYSDEP_H */
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