--- /dev/null
+/* Structure describing state saved while handling a signal. Sparc version.
+Copyright (C) 1992 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. */
+
+struct sigcontext
+ {
+ int sc_onstack;
+ sigset_t sc_mask;
+
+#define SPARC_MAXREGWINDOW 31 /* Maximum usable register windows. */
+ int sc_sp, sc_pc, sc_npc, sc_psr, sc_g1, sc_o0;
+ int sc_wbcnt; /* Number of outstanding windows. */
+ PTR sc_spbuf[SPARC_MAXREGWINDOW]; /* SP's for each window. */
+ int sc_wbuf[SPARC_MAXREGWINDOW][16]; /* Saved register windows. */
+ };
+
--- /dev/null
+/* Copyright (C) 1991 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>
+
+/* 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), int sig)
+{
+ /* We use `double' and `long long int' so `std' (store doubleword) insns,
+ which might be faster than single-word stores, will be generated. */
+ register double f0 asm("%f0");
+ register double f2 asm("%f2");
+ register double f4 asm("%f4");
+ register double f6 asm("%f6");
+ register double f8 asm("%f8");
+ register double f10 asm("%f10");
+ register double f12 asm("%f12");
+ register double f14 asm("%f14");
+ register double f16 asm("%f16");
+ register double f18 asm("%f18");
+ register double f20 asm("%f20");
+ register double f22 asm("%f22");
+ register double f24 asm("%f24");
+ register double f26 asm("%f26");
+ register double f28 asm("%f28");
+ register double f30 asm("%f30");
+ register long long int g2 asm("%g2");
+ register long long int g4 asm("%g4");
+ register long long int g6 asm("%g6");
+ register int *fp asm("%fp");
+
+ int code;
+ register struct sigcontext *context asm("%i0"); /* See end of fn. */
+ PTR addr;
+ int y;
+ double fpsave[16];
+ int fsr;
+ int savefpu;
+ long long int glsave[3];
+
+ /* SIG isn't really passed as an arg.
+ The args to the signal handler are at fp[16..19]. */
+ sig = fp[16];
+ code = fp[17];
+ context = (struct sigcontext *) fp[18];
+ addr = (PTR) fp[19];
+
+ /* Save the Y register. */
+ asm("rd %%y, %0" : "=r" (y));
+
+ /* Save the FPU regs if the FPU enable bit is set in the PSR,
+ and the signal isn't an FP exception. */
+ savefpu = (context->sc_psr & 0x1000) && sig != SIGFPE;
+ if (savefpu)
+ {
+ fpsave[0] = f0;
+ fpsave[1] = f2;
+ fpsave[2] = f4;
+ fpsave[3] = f6;
+ fpsave[4] = f8;
+ fpsave[5] = f10;
+ fpsave[6] = f12;
+ fpsave[7] = f14;
+ fpsave[8] = f16;
+ fpsave[9] = f18;
+ fpsave[10] = f20;
+ fpsave[11] = f22;
+ fpsave[12] = f24;
+ fpsave[13] = f26;
+ fpsave[14] = f28;
+ fpsave[15] = f30;
+
+ /* Force it into a stack slot so the asm won't barf. Sigh. */
+ (void) &fsr;
+ asm("st %%fsr, %0" : "=m" (fsr));
+ }
+
+ /* Save the global registers (except for %g1, which is a scratch reg). */
+ glsave[0] = g2;
+ glsave[1] = g4;
+ glsave[2] = g6;
+
+ /* Call the user's handler. */
+ (*((void EXFUN((*), (int sig, int code, struct sigcontext *context,
+ PTR addr))) handlers[sig]))
+ (sig, code, context, addr);
+
+ /* Restore the Y register. */
+ asm("mov %0, %%y" : : "r" (y));
+
+ if (savefpu)
+ {
+ /* Restore the FPU regs. */
+ f0 = fpsave[0];
+ f2 = fpsave[1];
+ f4 = fpsave[2];
+ f6 = fpsave[3];
+ f8 = fpsave[4];
+ f10 = fpsave[5];
+ f12 = fpsave[6];
+ f14 = fpsave[7];
+ f16 = fpsave[8];
+ f18 = fpsave[9];
+ f20 = fpsave[10];
+ f22 = fpsave[11];
+ f24 = fpsave[12];
+ f26 = fpsave[13];
+ f28 = fpsave[14];
+ f30 = fpsave[15];
+
+ asm("ld %0, %%fsr" : : "m" (fsr));
+ }
+
+ /* Restore the globals. */
+ g2 = glsave[0];
+ g4 = glsave[1];
+ g6 = glsave[2];
+
+ /* Unwind a frame, and do a "sigcleanup" system call.
+ The system call apparently does a return.
+ I don't know what it's for. Ask Sun. */
+ asm("restore %%g0, 139, %%g1\n"
+ "ta 0\n"
+ "mov %0, %0" /* Useless insn that will never be executed, */
+ /* here to make the compiler happy. */
+ : /* No outputs. */ :
+ /* CONTEXT is bound to %i0. We reference it as an input here to make
+ sure the compiler considers it live at this point, and preserves
+ the value in that register. The restore makes %i0 become %o0, the
+ argument to the system call. */
+ "r" (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;
+}
projects / thirdparty / glibc.git / commitdiff
