| /* |
| * 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; |
| } |