android_kernel_xiaomi_sm8350/arch/um/os-Linux/skas/trap.c
Jeff Dike 61b63c556c uml: eliminate SIGALRM
Now that ITIMER_REAL is no longer used, there is no need for any use of
SIGALRM whatsoever.  This patch removes all mention of it.

In addition, real_alarm_handler took a signal argument which is now always
SIGVTALRM.  So, that is gone.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16 09:43:08 -07:00

70 lines
1.7 KiB
C

/*
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#if 0
#include "kern_util.h"
#include "skas.h"
#include "ptrace_user.h"
#include "sysdep/ptrace_user.h"
#endif
#include <errno.h>
#include <signal.h>
#include "sysdep/ptrace.h"
#include "kern_constants.h"
#include "as-layout.h"
#include "os.h"
#include "sigcontext.h"
#include "task.h"
static struct uml_pt_regs ksig_regs[UM_NR_CPUS];
void sig_handler_common_skas(int sig, void *sc_ptr)
{
struct sigcontext *sc = sc_ptr;
struct uml_pt_regs *r;
void (*handler)(int, struct uml_pt_regs *);
int save_user, save_errno = errno;
/*
* 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.
* XXX Figure out why this is better than SA_NODEFER
*/
if (sig == SIGSEGV) {
change_sig(SIGSEGV, 1);
/*
* For segfaults, we want the data from the
* sigcontext. In this case, we don't want to mangle
* the process registers, so use a static set of
* registers. For other signals, the process
* registers are OK.
*/
r = &ksig_regs[cpu()];
copy_sc(r, sc_ptr);
}
else r = TASK_REGS(get_current());
save_user = r->is_user;
r->is_user = 0;
if ((sig == SIGFPE) || (sig == SIGSEGV) || (sig == SIGBUS) ||
(sig == SIGILL) || (sig == SIGTRAP))
GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
change_sig(SIGUSR1, 1);
handler = sig_info[sig];
/* unblock SIGVTALRM, SIGIO if sig isn't IRQ signal */
if ((sig != SIGIO) && (sig != SIGWINCH) && (sig != SIGVTALRM))
unblock_signals();
handler(sig, r);
errno = save_errno;
r->is_user = save_user;
}