mirror of git://sourceware.org/git/glibc.git
137 lines
4.6 KiB
C
137 lines
4.6 KiB
C
/* Copyright (C) 1992, 1993, 1995, 1996, 1997, 2002, 2003, 2004
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _LINUX_ALPHA_SYSDEP_H
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#define _LINUX_ALPHA_SYSDEP_H 1
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#ifdef __ASSEMBLER__
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#include <asm/pal.h>
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#include <alpha/regdef.h>
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#else
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#include <stdint.h>
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#endif
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/* There is some commonality. */
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#include <sysdeps/unix/alpha/sysdep.h>
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/* For Linux we can use the system call table in the header file
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/usr/include/asm/unistd.h
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of the kernel. But these symbols do not follow the SYS_* syntax
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so we have to redefine the `SYS_ify' macro here. */
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#undef SYS_ify
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#ifdef __STDC__
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# define SYS_ify(syscall_name) __NR_##syscall_name
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#else
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# define SYS_ify(syscall_name) __NR_/**/syscall_name
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#endif
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/* Define some aliases to make automatic syscall generation work
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properly. The SYS_* variants are for the benefit of the files in
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sysdeps/unix. */
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#define __NR_getpid __NR_getxpid
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#define __NR_getuid __NR_getxuid
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#define __NR_getgid __NR_getxgid
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#define SYS_getpid __NR_getxpid
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#define SYS_getuid __NR_getxuid
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#define SYS_getgid __NR_getxgid
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/*
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* Some syscalls no Linux program should know about:
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*/
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#define __NR_osf_sigprocmask 48
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#define __NR_osf_shmat 209
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#define __NR_osf_getsysinfo 256
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#define __NR_osf_setsysinfo 257
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/* Help old kernel headers where particular syscalls are not available. */
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#ifndef __NR_semtimedop
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# define __NR_semtimedop 423
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#endif
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/* This is a kludge to make syscalls.list find these under the names
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pread and pwrite, since some kernel headers define those names
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and some define the *64 names for the same system calls. */
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#if !defined __NR_pread && defined __NR_pread64
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# define __NR_pread __NR_pread64
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#endif
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#if !defined __NR_pwrite && defined __NR_pwrite64
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# define __NR_pwrite __NR_pwrite64
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#endif
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/*
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* In order to get the hidden arguments for rt_sigaction set up
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* properly, we need to call the assembly version. This shouldn't
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* happen except for inside sigaction.c, where we handle this
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* specially. Catch other uses and error.
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*/
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#undef INLINE_SYSCALL
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#define INLINE_SYSCALL(name, nr, args...) \
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({ \
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extern char ChEcK[__NR_##name == __NR_rt_sigaction ? -1 : 1] \
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__attribute__((unused)); \
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INLINE_SYSCALL1(name, nr, args); \
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})
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#undef INTERNAL_SYSCALL
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#define INTERNAL_SYSCALL(name, err_out, nr, args...) \
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({ \
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extern char ChEcK[__NR_##name == __NR_rt_sigaction ? -1 : 1] \
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__attribute__((unused)); \
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INTERNAL_SYSCALL1(name, err_out, nr, args); \
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})
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/* Pointer mangling support. Note that tls access is slow enough that
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we don't deoptimize things by placing the pointer check value there. */
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#if defined NOT_IN_libc && defined IS_IN_rtld
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# ifdef __ASSEMBLER__
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# define PTR_MANGLE(dst, src, tmp) \
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ldah tmp, __pointer_chk_guard_local($29) !gprelhigh; \
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ldq tmp, __pointer_chk_guard_local(tmp) !gprellow; \
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xor src, tmp, dst
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# define PTR_MANGLE2(dst, src, tmp) \
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xor src, tmp, dst
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# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp)
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# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp)
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# else
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extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
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# define PTR_MANGLE(var) \
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(var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
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# define PTR_DEMANGLE(var) PTR_MANGLE(var)
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# endif
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#elif defined PIC
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# ifdef __ASSEMBLER__
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# define PTR_MANGLE(dst, src, tmp) \
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ldq tmp, __pointer_chk_guard; \
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xor src, tmp, dst
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# define PTR_MANGLE2(dst, src, tmp) \
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xor src, tmp, dst
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# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp)
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# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp)
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# else
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extern uintptr_t __pointer_chk_guard attribute_relro;
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# define PTR_MANGLE(var) \
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(var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard)
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# define PTR_DEMANGLE(var) PTR_MANGLE(var)
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# endif
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#endif
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#endif /* _LINUX_ALPHA_SYSDEP_H */
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