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author | Roland McGrath <roland@gnu.org> | 1995-02-18 01:27:10 +0000 |
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committer | Roland McGrath <roland@gnu.org> | 1995-02-18 01:27:10 +0000 |
commit | 28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch) | |
tree | 15f07c4c43d635959c6afee96bde71fb1b3614ee /sysdeps/unix/bsd/sun/m68k/sigtramp.c | |
download | glibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.tar.gz glibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.tar.xz glibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.zip |
initial import
Diffstat (limited to 'sysdeps/unix/bsd/sun/m68k/sigtramp.c')
-rw-r--r-- | sysdeps/unix/bsd/sun/m68k/sigtramp.c | 142 |
1 files changed, 142 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..32a2c2047e --- /dev/null +++ b/sysdeps/unix/bsd/sun/m68k/sigtramp.c @@ -0,0 +1,142 @@ +/* Copyright (C) 1993 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., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ansidecl.h> + +#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 EXFUN(__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 +DEFUN(trampoline, (sig, code, context, addr), + int sig AND int code AND struct sigcontext *context AND PTR 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 EXFUN((*), (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 +DEFUN(__sigvec, (sig, vec, ovec), + int sig AND CONST struct sigvec *vec AND 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) + { + 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; +} |