mirror of https://gitee.com/openkylin/linux.git
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/*
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* Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
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* Licensed under the GPL
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*/
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#include <signal.h>
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#include <errno.h>
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#include "kern_util.h"
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#include "as-layout.h"
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#include "task.h"
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#include "sigcontext.h"
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#include "skas.h"
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#include "ptrace_user.h"
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#include "sysdep/ptrace.h"
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#include "sysdep/ptrace_user.h"
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#include "os.h"
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static union 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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union uml_pt_regs *r;
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void (*handler)(int, union uml_pt_regs *);
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int save_user, save_errno = errno;
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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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/* 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->skas.is_user;
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r->skas.is_user = 0;
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if ( sig == SIGFPE || sig == SIGSEGV ||
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sig == SIGBUS || sig == SIGILL ||
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sig == SIGTRAP ) {
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GET_FAULTINFO_FROM_SC(r->skas.faultinfo, sc);
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}
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change_sig(SIGUSR1, 1);
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handler = sig_info[sig];
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/* unblock SIGALRM, SIGVTALRM, SIGIO if sig isn't IRQ signal */
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if (sig != SIGIO && sig != SIGWINCH &&
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sig != SIGVTALRM && sig != SIGALRM)
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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->skas.is_user = save_user;
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}
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