1/* 2 * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com) 3 * Licensed under the GPL 4 */ 5 6#include <signal.h> 7#include <sys/select.h> /* The only way I can see to get sigset_t */ 8#include <asm/unistd.h> 9#include "uml-config.h" 10#include "sysdep/stub.h" 11#include "sysdep/sigcontext.h" 12#include "sysdep/faultinfo.h" 13 14void __attribute__ ((__section__ (".__syscall_stub"))) 15stub_segv_handler(int sig) 16{ 17 struct sigcontext *sc = (struct sigcontext *) (&sig + 1); 18 int pid; 19 20 GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA), 21 sc); 22 23 pid = stub_syscall0(__NR_getpid); 24 stub_syscall2(__NR_kill, pid, SIGUSR1); 25 26 /* Load pointer to sigcontext into esp, since we need to leave 27 * the stack in its original form when we do the sigreturn here, by 28 * hand. 29 */ 30 __asm__ __volatile__("mov %0,%%esp ; movl %1, %%eax ; " 31 "int $0x80" : : "a" (sc), "g" (__NR_sigreturn)); 32} 33