Initial revision
This commit is contained in:
Brendan Kehoe
parent
e6eb480835
commit
92a3358cb9
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@ -0,0 +1,79 @@
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/* Copyright (C) 1992 Free Software Foundation, Inc.
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Contributed by Brendan Kehoe (brendan@cs.widener.edu).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <setjmp.h>
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#include <stdlib.h>
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#undef __longjmp
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__NORETURN
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void
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DEFUN(__longjmp, (env, val_arg), CONST __jmp_buf env AND int val_arg)
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{
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/* gcc 1.39.19 miscompiled the longjmp routine (as it did setjmp before
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the hack around it); force it to use $a1 for the longjmp value.
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Without this it saves $a1 in a register which gets clobbered
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along the way. */
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register int val asm ("a1");
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/* Pull back the floating point callee-saved registers. */
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asm volatile ("l.d $f20, %0" : : "m" (env[0].__fpregs[0]));
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asm volatile ("l.d $f22, %0" : : "m" (env[0].__fpregs[1]));
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asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[2]));
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asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[3]));
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asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4]));
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asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[5]));
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/* Restore the stack pointer. */
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asm volatile ("lw $29, %0" : : "m" (env[0].__sp));
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/* Get and reconstruct the floating point csr. */
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asm volatile ("lw $2, %0" : : "m" (env[0].__fpc_csr));
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asm volatile ("ctc1 $2, $31");
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/* Get the FP. */
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asm volatile ("lw $30, %0" : : "m" (env[0].__fp));
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/* Get the GP. */
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asm volatile ("lw $gp, %0" : : "m" (env[0].__gp));
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/* Get the callee-saved registers. */
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asm volatile ("lw $16, %0" : : "m" (env[0].__regs[0]));
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asm volatile ("lw $17, %0" : : "m" (env[0].__regs[1]));
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asm volatile ("lw $18, %0" : : "m" (env[0].__regs[2]));
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asm volatile ("lw $19, %0" : : "m" (env[0].__regs[3]));
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asm volatile ("lw $20, %0" : : "m" (env[0].__regs[4]));
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asm volatile ("lw $21, %0" : : "m" (env[0].__regs[5]));
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asm volatile ("lw $22, %0" : : "m" (env[0].__regs[6]));
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asm volatile ("lw $23, %0" : : "m" (env[0].__regs[7]));
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/* Get the PC. */
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asm volatile ("lw $31, %0" : : "m" (env[0].__pc));
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/* Give setjmp() 1 if given a 0, or what they gave us if non-zero. */
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if (val == 0)
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asm volatile ("li $2, 1");
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else
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asm volatile ("move $2, %0" : : "r" (val));
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asm volatile ("j $31");
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/* Follow the trend.. */
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abort ();
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}
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@ -0,0 +1,27 @@
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/* Copyright (C) 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <sysdep.h>
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/* The function __setjmp_aux saves all the registers, but it can't
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reliably access the stack or frame pointers, so we pass them in as
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extra arguments. */
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ENTRY (__setjmp)
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move a1, sp
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move a2, $fp
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j __setjmp_aux
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@ -0,0 +1,65 @@
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/* Copyright (C) 1992 Free Software Foundation, Inc.
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Contributed by Brendan Kehoe (brendan@cs.widener.edu).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <setjmp.h>
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/* This function is only called via the assembly language routine
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__setjmp, which arranges to pass in the stack pointer and the frame
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pointer. We do things this way because it's difficult to reliably
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access them in C. */
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int
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DEFUN(__setjmp_aux, (env, sp, fp), __jmp_buf env AND int sp AND int fp)
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{
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/* Store the floating point callee-saved registers... */
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asm volatile ("s.d $f20, %0" : : "m" (env[0].__fpregs[0]));
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asm volatile ("s.d $f22, %0" : : "m" (env[0].__fpregs[1]));
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asm volatile ("s.d $f24, %0" : : "m" (env[0].__fpregs[2]));
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asm volatile ("s.d $f26, %0" : : "m" (env[0].__fpregs[3]));
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asm volatile ("s.d $f28, %0" : : "m" (env[0].__fpregs[4]));
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asm volatile ("s.d $f30, %0" : : "m" (env[0].__fpregs[5]));
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/* .. and the PC; */
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asm volatile ("sw $31, %0" : : "m" (env[0].__pc));
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/* .. and the stack pointer; */
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asm volatile ("sw %1, %0" : : "m" (env[0].__sp), "r" (sp));
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/* .. and the FP; it'll be in s8. */
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asm volatile ("sw %1, %0" : : "m" (env[0].__fp), "r" (fp));
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/* .. and the GP; */
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asm volatile ("sw $gp, %0" : : "m" (env[0].__gp));
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/* .. and the callee-saved registers; */
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asm volatile ("sw $16, %0" : : "m" (env[0].__regs[0]));
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asm volatile ("sw $17, %0" : : "m" (env[0].__regs[1]));
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asm volatile ("sw $18, %0" : : "m" (env[0].__regs[2]));
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asm volatile ("sw $19, %0" : : "m" (env[0].__regs[3]));
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asm volatile ("sw $20, %0" : : "m" (env[0].__regs[4]));
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asm volatile ("sw $21, %0" : : "m" (env[0].__regs[5]));
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asm volatile ("sw $22, %0" : : "m" (env[0].__regs[6]));
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asm volatile ("sw $23, %0" : : "m" (env[0].__regs[7]));
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/* .. and finally get and reconstruct the floating point csr. */
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asm volatile ("cfc1 $2, $31");
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asm volatile ("sw $2, %0" : : "m" (env[0].__fpc_csr));
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return 0;
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}
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@ -0,0 +1,6 @@
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ifeq ($(subdir),signal)
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sysdep_routines := $(sysdep_routines) sigtramp __handler
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endif
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ifeq ($(subdir),posix)
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sysdep_routines := $(sysdep_routines) __getsysinf
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endif
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@ -0,0 +1,109 @@
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/* Copyright (C) 1992 Free Software Foundation, Inc.
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Contributed by Brendan Kehoe (brendan@cs.widener.edu).
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Also hacked by Ian Lance Taylor (ian@airs.com).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <sysdep.h>
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/* This function saves all the registers, calls the
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user function, and then executes a sigreturn system call. The
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sigreturn call wants the address of a sigcontext structure. This
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is all hideously system dependent and, for all intents and
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purposes, undocumented.
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When we enter here, a3 holds the user's signal handler. We are
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supposed to fill in the context given in a2, and then pass it and
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the first two arguments to the user's function. If the user's
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function returns, we execute a sigreturn system call.
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The sc_onstack, sc_mask and sc_pc elements of the context are
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already set by the kernel. For some reason we don't have to save
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the floating point state or the coprocessor state; the kernel may
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have saved them for us, or it doesn't use them. */
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.set noat
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ENTRY (__handler)
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/* Store zero and the asm temp reg. */
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sw $0, 12(a2)
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sw AT, 16(a2)
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/* Put v1 in sc_regs[3]. */
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sw v1, 24(a2)
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/* Save the caller saved registers in sc_regs[8..15]. */
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sw t0, 44(a2)
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sw t1, 48(a2)
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sw t2, 52(a2)
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sw t3, 56(a2)
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sw t4, 60(a2)
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sw t5, 64(a2)
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sw t6, 48(a2)
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sw t7, 52(a2)
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/* Save the callee saved registers in sc_regs[16..23]. */
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sw s0, 76(a2)
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sw s1, 80(a2)
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sw s2, 84(a2)
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sw s3, 88(a2)
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sw s4, 92(a2)
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sw s5, 96(a2)
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sw s6, 100(a2)
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sw s7, 104(a2)
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/* Save the code generator registers in sc_regs[24] & sc_regs[25]. */
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sw t8, 108(a2)
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sw t9, 112(a2)
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/* Save the kernel temp regs in sc_regs[26] & sc_regs[27]. */
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sw k0, 116(a2)
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sw k1, 120(a2)
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/* Save the global pointer in sc_regs[28]. */
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sw gp, 124(a2)
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/* ... and also the return address in sc_regs[31]. */
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sw ra, 136(a2)
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/* Save the floating pointer and the stack pointer in
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sc_regs[29] and sc_regs[30]. */
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sw sp, 128(a2)
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sw $fp, 132(a2)
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/* Save the mul/div stuff in sc_mdlo and sc_mdhi. */
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mflo t0
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sw t0, 140(a2)
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mfhi t0
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sw t0, 144(a2)
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/* Move the stack up four. This will save the context. */
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addu sp, sp, -32
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sw a2, 16(sp)
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/* Call their handler with the signal, code, and context; note
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this will clobber the context. */
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.set noreorder
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jal ra, a3
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nop
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.set reorder
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/* When we come back, restore the context and pass it right
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on into sigreturn(). */
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lw a0, 16(sp)
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/* Do a sigreturn syscall; this doesn't return. */
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la v0, __sigreturn
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jal ra, v0
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@ -0,0 +1,60 @@
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/* Copyright (C) 1992 Free Software Foundation, Inc.
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Contributed by Brendan Kehoe (brendan@cs.widener.edu).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/* Note that ANY change to this instantly implies a change to __handler.S. */
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struct sigcontext
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{
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/* onsigstack flag, for the sigstack state we should restore */
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int sc_onstack;
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/* signal mask to restore */
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sigset_t sc_mask;
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/* Program counter when the signal hit. */
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int sc_pc;
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/* registers 0 through 31 */
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int sc_regs[32];
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/* mul/div low and hi; these aren't part of a jmpbuf, but are part of the
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sigcontext and are referenced from the signal trampoline code. */
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int sc_mdlo;
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int sc_mdhi;
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/* Flag to see if the fp's been used. */
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int sc_ownedfp;
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/* floating point registers 0 to 31 */
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int sc_fpregs[32];
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/* control & status register for fp */
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int sc_fpc_csr;
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/* exception instruction register for fp */
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int sc_fpc_eir;
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/* The coprocessor's cause register. */
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int sc_cause;
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/* CPU bad virtual address. */
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int sc_badvaddr;
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/* CPU board bad physical address. */
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int sc_badpaddr;
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};
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@ -0,0 +1,61 @@
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/* Copyright (C) 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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.
|
||||
|
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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
|
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
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Cambridge, MA 02139, USA. */
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/* The sigvec system call on MIPS Ultrix takes an additional
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parameter, which is the address that is actually called when the
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signal occurs.
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When a signal occurs, we arrange for the kernel to call __handler.
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That will save the frame and stack pointers into the context, and
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then jump to this routine. See __handler.S.
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This code is based on sysdeps/unix/bsd/sun4/sigtramp.c, but it's
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different because since we get passed the user signal handler we
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don't actually need a trampoline. */
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#include <ansidecl.h>
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#ifndef __GNUC__
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#error This file uses GNU C extensions; you must compile with GCC.
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#endif
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/* This will also get us sigcontext.h. */
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#include <signal.h>
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#include <stddef.h>
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#include <errno.h>
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/* The user's signal handler is called with three arguments. */
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typedef void (*handler_type) (int sig, int code, struct sigcontext *);
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/* Defined in __raw_sigvec.S. */
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extern int EXFUN(__raw_sigvec, (int sig, CONST struct sigvec *vec,
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struct sigvec *ovec,
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void (*)(int sig, int code,
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struct sigcontext *,
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handler_type)));
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extern void EXFUN(__handler, (int sig, int code,
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struct sigcontext *,
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handler_type));
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|
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int
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DEFUN(__sigvec, (sig, vec, ovec),
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int sig AND CONST struct sigvec *vec AND struct sigvec *ovec)
|
||||
{
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return __raw_sigvec (sig, vec, ovec, __handler);
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}
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