/* 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