mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
103 lines
3.3 KiB
C
103 lines
3.3 KiB
C
/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Written by Jes Sorensen, <Jes.Sorensen@cern.ch>, April 1999.
|
|
Based on code originally written by David Mosberger-Tang
|
|
|
|
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. */
|
|
|
|
#include <sysdeps/unix/sysdep.h>
|
|
#include <sysdeps/ia64/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__
|
|
|
|
#undef CALL_MCOUNT
|
|
#ifdef PROF
|
|
# define CALL_MCOUNT \
|
|
.data; \
|
|
1: data8 0; /* XXX fixme: use .xdata8 once labels work */ \
|
|
.previous; \
|
|
.prologue; \
|
|
.save ar.pfs, r40; \
|
|
alloc out0 = ar.pfs, 8, 0, 4, 0; \
|
|
mov out1 = gp; \
|
|
.save rp, out2; \
|
|
mov out2 = rp; \
|
|
.body; \
|
|
;; \
|
|
addl out3 = @ltoff(1b), gp; \
|
|
br.call.sptk.many rp = _mcount \
|
|
;;
|
|
#else
|
|
# define CALL_MCOUNT /* Do nothing. */
|
|
#endif
|
|
|
|
/* Linux uses a negative return value to indicate syscall errors, unlike
|
|
most Unices, which use the condition codes' carry flag.
|
|
|
|
Since version 2.1 the return value of a system call might be negative
|
|
even if the call succeeded. E.g., the `lseek' system call might return
|
|
a large offset. Therefore we must not anymore test for < 0, but test
|
|
for a real error by making sure the value in %d0 is a real error
|
|
number. Linus said he will make sure the no syscall returns a value
|
|
in -1 .. -4095 as a valid result so we can savely test with -4095. */
|
|
|
|
/* We don't want the label for the error handler to be visible in the symbol
|
|
table when we define it here. */
|
|
#define SYSCALL_ERROR_LABEL __syscall_error
|
|
|
|
#undef PSEUDO
|
|
#define PSEUDO(name, syscall_name, args) \
|
|
ENTRY(name) \
|
|
DO_CALL (SYS_ify(syscall_name)); \
|
|
cmp.eq p6,p0=-1,r10;; \
|
|
(p6) br.cond.spnt.few __syscall_error;
|
|
|
|
#define DO_CALL(num) \
|
|
mov r15=num; \
|
|
break __BREAK_SYSCALL;
|
|
|
|
#undef PSEUDO_END
|
|
#define PSEUDO_END(name) .endp C_SYMBOL_NAME(name);
|
|
|
|
#undef END
|
|
#define END(name) \
|
|
.size C_SYMBOL_NAME(name), . - C_SYMBOL_NAME(name) ; \
|
|
.endp C_SYMBOL_NAME(name)
|
|
|
|
#define ret br.ret.sptk.few b0
|
|
|
|
#else /* not __ASSEMBLER__ */
|
|
|
|
/* Define a macro which expands into the inline wrapper code for a system
|
|
call. */
|
|
#if 0
|
|
#undef INLINE_SYSCALL
|
|
#define INLINE_SYSCALL(name, nr, args...) __##name (args)
|
|
#endif
|
|
|
|
#endif /* not __ASSEMBLER__ */
|