diff options
Diffstat (limited to 'sysdeps/unix/bsd/sun/m68k/sigtramp.c')
| -rw-r--r-- | sysdeps/unix/bsd/sun/m68k/sigtramp.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/sun/m68k/sigtramp.c b/sysdeps/unix/bsd/sun/m68k/sigtramp.c new file mode 100644 index 0000000000..5a3ca3cf10 --- /dev/null +++ b/sysdeps/unix/bsd/sun/m68k/sigtramp.c @@ -0,0 +1,145 @@ +/* Copyright (C) 1993, 1996, 1997, 2004 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 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. */ + +#ifndef __GNUC__ + #error This file uses GNU C extensions; you must compile with GCC. +#endif + +/* Get the definition of `struct sigcontext'. */ +#define KERNEL +#define sigvec sun_sigvec +#define sigstack sun_sigstack +#define sigcontext sun_sigcontext +#include "/usr/include/sys/signal.h" +#undef sigvec +#undef sigstack +#undef sigcontext +#undef NSIG +#undef SIGABRT +#undef SIGCLD +#undef SV_ONSTACK +#undef SV_RESETHAND +#undef SV_INTERRUPT +#undef SA_ONSTACK +#undef SA_NOCLDSTOP +#undef SIG_ERR +#undef SIG_DFL +#undef SIG_IGN +#undef sigmask +#undef SIG_BLOCK +#undef SIG_UNBLOCK +#undef SIG_SETMASK + +#include <signal.h> +#include <stddef.h> +#include <errno.h> + +/* Defined in __sigvec.S. */ +extern int __raw_sigvec (int sig, const struct sigvec *vec, + struct sigvec *ovec); + +/* User-specified signal handlers. */ +#define mytramp 1 +#ifdef mytramp +static __sighandler_t handlers[NSIG]; +#else +#define handlers _sigfunc +extern __sighandler_t _sigfunc[]; +#endif + +#if mytramp + +/* Handler for all signals that are handled by a user-specified function. + Saves and restores the general regs %g2-%g7, the %y register, and + all the FPU regs (including %fsr), around calling the user's handler. */ +static void +trampoline (sig, code, context, addr) + int sig; + int code; + struct sigcontext *context; + void *addr; +{ + int save[4]; + + /* Save the call-clobbered registers. */ + asm volatile ("movem%.l d0-d1/a0-a1, %0" : : "m" (save[0])); + + /* XXX should save/restore FP regs */ + + /* Call the user's handler. */ + (*((void (*) (int sig, int code, struct sigcontext *context, + PTR addr)) handlers[sig])) + (sig, code, context, addr); + + /* Restore the call-clobbered registers. */ + asm volatile ("movem%.l %0, d0-d1/a0-a1" : : "g" (save[0]) : + "d0", "d1", "a0", "a1"); + + __sigreturn (context); +} + +#endif + +int +__sigvec (sig, vec, ovec) + int sig; + const struct sigvec *vec; + struct sigvec *ovec; +{ +#ifndef mytramp + extern void _sigtramp (int); +#define trampoline _sigtramp +#endif + struct sigvec myvec; + int mask; + __sighandler_t ohandler; + + if (sig <= 0 || sig >= NSIG) + { + __set_errno (EINVAL); + return -1; + } + + mask = __sigblock(sigmask(sig)); + + ohandler = handlers[sig]; + + if (vec != NULL && + vec->sv_handler != SIG_IGN && vec->sv_handler != SIG_DFL) + { + handlers[sig] = vec->sv_handler; + myvec = *vec; + myvec.sv_handler = trampoline; + vec = &myvec; + } + + if (__raw_sigvec(sig, vec, ovec) < 0) + { + int save = errno; + (void) __sigsetmask(mask); + errno = save; + return -1; + } + + if (ovec != NULL && ovec->sv_handler == trampoline) + ovec->sv_handler = ohandler; + + (void) __sigsetmask(mask); + + return 0; +} |