--- /dev/null
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+ Contributed by Brendan Kehoe (brendan@cs.widener.edu).
+ Also hacked by Ian Lance Taylor (ian@airs.com).
+
+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 <sysdep.h>
+
+/* This function saves all the registers, calls the
+ user function, and then executes a sigreturn system call. The
+ sigreturn call wants the address of a sigcontext structure. This
+ is all hideously system dependent and, for all intents and
+ purposes, undocumented.
+
+ When we enter here, a3 holds the user's signal handler. We are
+ supposed to fill in the context given in a2, and then pass it and
+ the first two arguments to the user's function. If the user's
+ function returns, we execute a sigreturn system call.
+
+ The sc_onstack, sc_mask and sc_pc elements of the context are
+ already set by the kernel. For some reason we don't have to save
+ the floating point state or the coprocessor state; the kernel may
+ have saved them for us, or it doesn't use them. */
+
+.set noat
+ENTRY (__handler)
+#if 0
+ /* Store zero and the asm temp reg. */
+ sw $0, 12(a2)
+ sw AT, 16(a2)
+
+ /* Put v1 in sc_regs[3]. */
+ sw v1, 24(a2)
+
+ /* Save the caller saved registers in sc_regs[8..15]. */
+ sw t0, 44(a2)
+ sw t1, 48(a2)
+ sw t2, 52(a2)
+ sw t3, 56(a2)
+ sw t4, 60(a2)
+ sw t5, 64(a2)
+ sw t6, 68(a2)
+ sw t7, 72(a2)
+
+ /* Save the callee saved registers in sc_regs[16..23]. */
+ sw s0, 76(a2)
+ sw s1, 80(a2)
+ sw s2, 84(a2)
+ sw s3, 88(a2)
+ sw s4, 92(a2)
+ sw s5, 96(a2)
+ sw s6, 100(a2)
+ sw s7, 104(a2)
+
+ /* Save the code generator registers in sc_regs[24] & sc_regs[25]. */
+ sw t8, 108(a2)
+ sw t9, 112(a2)
+
+ /* Save the kernel temp regs in sc_regs[26] & sc_regs[27]. */
+ sw k0, 116(a2)
+ sw k1, 120(a2)
+
+ /* Save the global pointer in sc_regs[28]. */
+ sw gp, 124(a2)
+
+ /* ... and also the return address in sc_regs[31]. */
+ sw ra, 136(a2)
+
+ /* Note: we don't save the stack pointer in sc_regs[29];
+ instead, we use the one that was already there. */
+#if 0
+ sw sp, 128(a2)
+#endif
+
+ /* Save the floating pointer in sc_regs[30]. */
+ sw fp, 132(a2)
+
+ /* Save the mul/div stuff in sc_mdlo and sc_mdhi. */
+ mflo t0
+ sw t0, 140(a2)
+ mfhi t0
+ sw t0, 144(a2)
+
+#endif
+ /* Move the stack up six. This will save the context. */
+ addu sp, sp, -24
+ sw a2, 16(sp)
+
+ /* Call their handler with the signal, code, and context; note
+ this will clobber the context. */
+ .set noreorder
+ jal ra, a3
+ nop
+ .set reorder
+
+ /* When we come back, restore the context and pass it right
+ on into sigreturn(). */
+ lw a0, 16(sp)
+
+ /* Do a sigreturn syscall; this doesn't return. */
+ li v0, SYS_sigreturn
+ syscall
+ nop
--- /dev/null
+/* Copyright (C) 1991, 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. */
+
+#include <sysdep.h>
+
+PSEUDO (__raw_signal, signal, 3)
+ ret
--- /dev/null
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+ Contributed by Brendan Kehoe (brendan@cs.widener.edu).
+
+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 <sysdep.h>
+
+ENTRY(__sigreturn)
+ li v0, SYS_sigreturn
+ syscall
--- /dev/null
+/* 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. */
+
+/* The sigvec system call on MIPS Ultrix takes an additional
+ parameter, which is the address that is actually called when the
+ signal occurs.
+
+ When a signal occurs, we arrange for the kernel to call __handler.
+ That will save the frame and stack pointers into the context, and
+ then jump to this routine. See __handler.S.
+
+ This code is based on sysdeps/unix/bsd/sun4/sigtramp.c, but it's
+ different because since we get passed the user signal handler we
+ don't actually need a trampoline. */
+
+#include <ansidecl.h>
+#include <signal.h>
+#include <stddef.h>
+#include <errno.h>
+
+/* The user's signal handler is called with three arguments. */
+typedef void (*handler_type) (int sig, int code, struct sigcontext *);
+
+/* Defined in signal.S. */
+extern __sighandler_t EXFUN(__raw_signal, (int sig, __sighandler_t func,
+ void (*)(int sig, int code,
+ struct sigcontext *,
+ handler_type)));
+
+extern void EXFUN(__handler, (int sig, int code,
+ struct sigcontext *,
+ handler_type));
+
+__sighandler_t
+DEFUN(signal, (sig, func),
+ int sig AND __sighandler_t func)
+{
+ return __raw_signal (sig, func, __handler);
+}
projects / external / glibc.git / commitdiff