glibc/sysdeps/unix/sysv/linux/sigstack.c
Ulrich Drepper 8ce9ea0ca6 Update.
* dlfcn/dlfcn.h (RTLD_DEFAULT): Don't use NULL.

	* iconv/iconv.h (iconv): Fix prototype.

	* misc/libgen.h: When using gcc using renaming feature to get XPG
	definition of basename.

	* misc/search.h (struct entry): Fix type of element data.

	* posix/unistd.h (getpagesize): Declare as const function.

	* sysdeps/unix/sysv/linux/alpha/bits/sigaction.h: Define SA_NOCLDWAIT.
	* sysdeps/unix/sysv/linux/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/sigaction.h: Likewise.

	* signal/signal.h [__USE_XOPEN]: Define uid_t.
	(sigstack): Correct type of first parameter.
	* sysdeps/generic/sigstack.c (sigstack): Likewise.
	* sysdeps/unix/sysv/linux/sigstack.c (sigstack): Likewise.

	* sysdeps/unix/sysv/linux/alpha/bits/siginfo.h: New file.  Copy of
	old sysdeps/unix/sysv/linux/bits/siginfo.h.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bits/siginfo.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/siginfo.h [struct siginfo] (si_band):
	Change type to `long int'.

	* signal/signal.h [__USE_XOPEN]: Declare sigpause to redirect to
	__xpg_sigpause.
	* sysdeps/generic/sigpause.c: Define __xpg_sigpause.
	* sysdeps/posix/sigpause.c: Likewise.

	* conform/conformtest.pl: Correct bugs.  Add more functionality.
	* conform/data/dlfcn.h-data: Correct typos.
	* conform/data/ftw.h-data: Likewise.
	* conform/data/iconv.h-data: Likewise.
	* conform/data/nl_types.h-data: Likewise.
	* conform/data/search.h-data: Likewise.
	* conform/data/semaphore.h-data: New file.
	* conform/data/setjmp.h-data: New file.
	* conform/data/signal.h-data: New file.
	* conform/data/stdarg.h-data: New file.
	* conform/data/stddef.h-data: New file.
	* conform/data/stdio.h-data: New file.
2000-02-23 06:02:09 +00:00

70 lines
2.1 KiB
C

/* Emulate sigstack function using sigaltstack.
Copyright (C) 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <signal.h>
#include <stddef.h>
#include <sys/syscall.h>
#ifdef __NR_sigaltstack
int
sigstack (ss, oss)
struct sigstack *ss;
struct sigstack *oss;
{
stack_t sas;
stack_t *sasp = NULL;
stack_t osas;
stack_t *osasp = oss == NULL ? NULL : &osas;
int result;
if (ss != NULL)
{
/* We have to convert the information. */
sas.ss_sp = ss->ss_sp;
sas.ss_flags = ss->ss_onstack ? SS_ONSTACK : 0;
/* For the size of the stack we have no value we can pass to the
kernel. This is why this function should not be used. We simply
assume that all the memory down to address zero (in case the stack
grows down) is available. */
sas.ss_size = ss->ss_sp - NULL;
sasp = &sas;
}
/* Call the kernel. */
result = __sigaltstack (sasp, osasp);
/* Convert the result, if wanted and possible. */
if (result == 0 && oss != NULL)
{
oss->ss_sp = osas.ss_sp;
oss->ss_onstack = (osas.ss_flags & SS_ONSTACK) != 0;
}
return result;
}
link_warning (sigstack, "the `sigstack' function is dangerous. `sigaltstack' should be used instead.")
#else
# include <sysdeps/generic/sigstack.c>
#endif