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// ppc-signal.h - Catch runtime signals and turn them into exceptions.
/* Copyright (C) 2000 Free Software Foundation
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
#ifndef JAVA_SIGNAL_H
#define JAVA_SIGNAL_H 1
#include <signal.h>
#include <ucontext.h>
#define HANDLE_SEGV 1
#undef HANDLE_FPE
#define SIGNAL_HANDLER(_name) \
__asm ("\t.section\t\".text\"\n" \
"\t.align 2\n" \
"_Jv_" #_name ":\n" \
"\tmr 3, 1\n" \
"\tb _Jv_stub_" #_name "\n"); \
extern "C" void _Jv_##_name (int _dummy); \
extern "C" void _Jv_stub_##_name (char *_sp) \
class java::lang::Throwable;
// Unwind the stack to the point at which the signal was generated and
// then throw an exception.
#define MAKE_THROW_FRAME(_exception) \
do \
{ \
struct sigcontext_struct *_context \
= (struct sigcontext_struct *)(_sp + __SIGNAL_FRAMESIZE); \
long int regs [34]; \
memcpy (regs, &_context->regs->gpr[0], 32 * sizeof (long int)); \
regs[32] = _context->regs->nip + sizeof (long int); \
regs[33] = _context->regs->link; \
\
__asm volatile ( \
"\tmr 31,%0\n" \
"\tmr 3,%1 # exception to throw\n" \
"\tlwz 0,128(31) # ip\n" \
"\tmtlr 0\n" \
"\tlwz 1,4(31) # previous r1\n" \
"\tlwz 0,132(31) # previous lr\n" \
"\tlwz 2,0(1) # previous previous r1\n" \
"\tstw 0,4(2) # save previous lr\n" \
"\tlwz 0,0(31)\n" \
"\tlwz 2,8(31)\n" \
"\tlwz 4,16(31)\n" \
"\tlwz 5,20(31)\n" \
"\tlwz 6,24(31)\n" \
"\tlwz 7,28(31)\n" \
"\tlwz 8,32(31)\n" \
"\tlwz 9,36(31)\n" \
"\tlwz 10,40(31)\n" \
"\tlwz 11,44(31)\n" \
"\tlwz 12,48(31)\n" \
"\tlwz 13,52(31)\n" \
"\tlwz 14,56(31)\n" \
"\tlwz 15,60(31)\n" \
"\tlwz 16,64(31)\n" \
"\tlwz 17,68(31)\n" \
"\tlwz 18,72(31)\n" \
"\tlwz 19,76(31)\n" \
"\tlwz 20,80(31)\n" \
"\tlwz 21,84(31)\n" \
"\tlwz 22,88(31)\n" \
"\tlwz 23,92(31)\n" \
"\tlwz 24,96(31)\n" \
"\tlwz 25,100(31)\n" \
"\tlwz 26,104(31)\n" \
"\tlwz 27,108(31)\n" \
"\tlwz 28,112(31)\n" \
"\tlwz 29,116(31)\n" \
"\tlwz 30,120(31)\n" \
"\tlwz 31,124(31)\n" \
"\tb _Jv_ThrowSignal\n" \
: : "r"(regs), "r"(_exception) \
: "r31", "r3"); \
} \
while (0)
#define INIT_SEGV \
do \
{ \
nullp = new java::lang::NullPointerException (); \
struct sigaction act; \
act.sa_handler = _Jv_catch_segv; \
sigemptyset (&act.sa_mask); \
act.sa_flags = 0; \
__sigaction (SIGSEGV, &act, NULL); \
} \
while (0)
#define INIT_FPE \
do \
{ \
arithexception = new java::lang::ArithmeticException \
(JvNewStringLatin1 ("/ by zero")); \
struct sigaction act; \
act.sa_handler = _Jv_catch_fpe; \
sigemptyset (&act.sa_mask); \
act.sa_flags = 0; \
__sigaction (SIGFPE, &act, NULL); \
} \
while (0)
#endif /* JAVA_SIGNAL_H */
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