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/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include <stdlib.h>
#include <errno.h>
#include <signal.h>
#include "sysdep/ptrace.h"
#include "sysdep/sigcontext.h"
#include "user_util.h"
#include "kern_util.h"
#include "task.h"
#include "tt.h"
#include "os.h"
void sig_handler_common_tt(int sig, void *sc_ptr)
{
struct sigcontext *sc = sc_ptr;
struct tt_regs save_regs, *r;
int save_errno = errno, is_user = 0;
void (*handler)(int, union uml_pt_regs *);
/* This is done because to allow SIGSEGV to be delivered inside a SEGV
* handler. This can happen in copy_user, and if SEGV is disabled,
* the process will die.
*/
if(sig == SIGSEGV)
change_sig(SIGSEGV, 1);
r = &TASK_REGS(get_current())->tt;
if ( sig == SIGFPE || sig == SIGSEGV ||
sig == SIGBUS || sig == SIGILL ||
sig == SIGTRAP ) {
GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
}
save_regs = *r;
if (sc)
is_user = user_context(SC_SP(sc));
r->sc = sc;
if(sig != SIGUSR2)
r->syscall = -1;
handler = sig_info[sig];
/* unblock SIGALRM, SIGVTALRM, SIGIO if sig isn't IRQ signal */
if (sig != SIGIO && sig != SIGWINCH &&
sig != SIGVTALRM && sig != SIGALRM)
unblock_signals();
handler(sig, (union uml_pt_regs *) r);
if(is_user){
interrupt_end();
block_signals();
set_user_mode(NULL);
}
*r = save_regs;
errno = save_errno;
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/
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