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/* Copyright (C) 1997, 1998, 1999, 2000 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 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 <errno.h>
#include <signal.h>
#include <string.h>
#include <sys/syscall.h>
/* The difference here is that the sigaction structure used in the
kernel is not the same as we use in the libc. Therefore we must
translate it here. */
#define HAVE_SA_RESTORER
#if defined(__alpha__)
#undef HAVE_SA_RESTORER
/* This is the sigaction struction from the Linux 2.1.20 kernel. */
struct old_kernel_sigaction {
__sighandler_t k_sa_handler;
unsigned long sa_mask;
unsigned int sa_flags;
};
/* This is the sigaction structure from the Linux 2.1.68 kernel. */
struct kernel_sigaction {
__sighandler_t k_sa_handler;
unsigned int sa_flags;
sigset_t sa_mask;
};
#elif defined(__hppa__)
/* We do not support SA_RESTORER on hppa. */
#undef HAVE_SA_RESTORER
/* This is the sigaction struction from the Linux 2.1.20 kernel. */
/* Blah. This is bogus. We don't ever use it. */
struct old_kernel_sigaction {
__sighandler_t k_sa_handler;
unsigned long sa_mask;
unsigned long sa_flags;
};
/* This is the sigaction structure from the Linux 2.1.68 kernel. */
struct kernel_sigaction {
__sighandler_t k_sa_handler;
unsigned long sa_flags;
sigset_t sa_mask;
};
#elif defined(__mips__)
/* This is the sigaction structure from the Linux 2.1.24 kernel. */
#include <sgidefs.h>
struct old_kernel_sigaction {
unsigned int sa_flags;
__sighandler_t k_sa_handler;
unsigned long sa_mask;
unsigned int __pad0[3]; /* reserved, keep size constant */
/* Abi says here follows reserved int[2] */
void (*sa_restorer)(void);
#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2)
/* For 32 bit code we have to pad struct sigaction to get
* constant size for the ABI */
int pad1[1]; /* reserved */
#endif
};
#define _KERNEL_NSIG 128
#define _KERNEL_NSIG_BPW 32
#define _KERNEL_NSIG_WORDS (_KERNEL_NSIG / _KERNEL_NSIG_BPW)
typedef struct {
unsigned long sig[_KERNEL_NSIG_WORDS];
} kernel_sigset_t;
/* This is the sigaction structure from the Linux 2.1.68 kernel. */
struct kernel_sigaction {
unsigned int sa_flags;
__sighandler_t k_sa_handler;
kernel_sigset_t sa_mask;
void (*sa_restorer)(void);
int s_resv[1]; /* reserved */
};
#else
/* This is the sigaction structure from the Linux 2.1.20 kernel. */
struct old_kernel_sigaction {
__sighandler_t k_sa_handler;
unsigned long sa_mask;
unsigned long sa_flags;
void (*sa_restorer) (void);
};
/* This is the sigaction structure from the Linux 2.1.68 kernel. */
struct kernel_sigaction {
__sighandler_t k_sa_handler;
unsigned long sa_flags;
void (*sa_restorer) (void);
sigset_t sa_mask;
};
#endif
#if defined __NR_rt_sigaction
extern int __rt_sigaction (int, const struct kernel_sigaction *__unbounded,
struct kernel_sigaction *__unbounded, size_t);
/* If ACT is not NULL, change the action for SIG to *ACT.
If OACT is not NULL, put the old action for SIG in *OACT. */
int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
{
int result;
struct kernel_sigaction kact, koact;
if (act) {
kact.k_sa_handler = act->sa_handler;
memcpy (&kact.sa_mask, &act->sa_mask, sizeof (kact.sa_mask));
kact.sa_flags = act->sa_flags;
# ifdef HAVE_SA_RESTORER
kact.sa_restorer = act->sa_restorer;
# endif
}
/* XXX The size argument hopefully will have to be changed to the
real size of the user-level sigset_t. */
result = __rt_sigaction(sig, act ? __ptrvalue (&kact) : NULL,
oact ? __ptrvalue (&koact) : NULL, _NSIG / 8);
if (oact && result >= 0) {
oact->sa_handler = koact.k_sa_handler;
memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (oact->sa_mask));
oact->sa_flags = koact.sa_flags;
# ifdef HAVE_SA_RESTORER
oact->sa_restorer = koact.sa_restorer;
# endif
}
return result;
}
weak_alias(__libc_sigaction, sigaction)
#else
extern int __sigaction (int, const struct old_kernel_sigaction *__unbounded,
struct old_kernel_sigaction *__unbounded);
/* If ACT is not NULL, change the action for SIG to *ACT.
If OACT is not NULL, put the old action for SIG in *OACT. */
int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
{
struct old_kernel_sigaction k_sigact, k_osigact;
int result;
if (act) {
k_sigact.k_sa_handler = act->sa_handler;
k_sigact.sa_mask = act->sa_mask.__val[0];
k_sigact.sa_flags = act->sa_flags;
# ifdef HAVE_SA_RESTORER
k_sigact.sa_restorer = act->sa_restorer;
# endif
}
result = __sigaction(sig, act ? __ptrvalue (&k_sigact) : NULL,
oact ? __ptrvalue (&k_osigact) : NULL);
if (oact && result >= 0) {
oact->sa_handler = k_osigact.k_sa_handler;
oact->sa_mask.__val[0] = k_osigact.sa_mask;
oact->sa_flags = k_osigact.sa_flags;
# ifdef HAVE_SA_RESTORER
oact->sa_restorer = k_osigact.sa_restorer;
# endif
}
return result;
}
weak_alias(__libc_sigaction, sigaction)
#endif
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