#ifndef JAVA_SIGNAL_H
#define JAVA_SIGNAL_H 1
#include <signal.h>
#include <sys/syscall.h>
#ifdef __x86_64__
#define HANDLE_SEGV 1
#define SIGNAL_HANDLER(_name) \
static void _Jv_##_name (int, siginfo_t *_sip, void *_p)
extern "C"
{
struct kernel_sigaction
{
void (*k_sa_sigaction)(int,siginfo_t *,void *);
unsigned long k_sa_flags;
void (*k_sa_restorer) (void);
sigset_t k_sa_mask;
};
}
#define MAKE_THROW_FRAME(_exception) \
do \
{ \
\
struct ucontext *_uc = (struct ucontext *)_p; \
struct sigcontext *_sc = (struct sigcontext *) &_uc->uc_mcontext; \
_sc->rip += 2; \
} \
while (0)
#define RESTORE(name, syscall) RESTORE2 (name, syscall)
#define RESTORE2(name, syscall) \
asm \
( \
".byte 0 # Yes, this really is necessary\n" \
".align 16\n" \
"__" #name ":\n" \
" movq $" #syscall ", %rax\n" \
" syscall\n" \
);
RESTORE (restore_rt, __NR_rt_sigreturn)
static void restore_rt (void) asm ("__restore_rt");
#define INIT_SEGV \
do \
{ \
nullp = new java::lang::NullPointerException (); \
struct kernel_sigaction act; \
act.k_sa_sigaction = _Jv_catch_segv; \
sigemptyset (&act.k_sa_mask); \
act.k_sa_flags = SA_SIGINFO|0x4000000; \
act.k_sa_restorer = restore_rt; \
syscall (SYS_rt_sigaction, SIGSEGV, &act, NULL, _NSIG / 8); \
} \
while (0)
#else
#undef HANDLE_SEGV
#undef HANDLE_FPE
#define INIT_SEGV do {} while (0)
#define INIT_FPE do {} while (0)
#endif
#endif