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