[deliverable/linux.git] / arch / um / sys-i386 / stub_segv.c

/*
 * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
 * Licensed under the GPL
 */

#include <asm/signal.h>
#include <asm/unistd.h>
#include "uml-config.h"
#include "sysdep/sigcontext.h"
#include "sysdep/faultinfo.h"

void __attribute__ ((__section__ (".__syscall_stub")))
stub_segv_handler(int sig)
{
	struct sigcontext *sc = (struct sigcontext *) (&sig + 1);

	GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA),
			      sc);

	__asm__("movl %0, %%eax ; int $0x80": : "g" (__NR_getpid));
	__asm__("movl %%eax, %%ebx ; movl %0, %%eax ; movl %1, %%ecx ;"
		"int $0x80": : "g" (__NR_kill), "g" (SIGUSR1));
	/* Load pointer to sigcontext into esp, since we need to leave
	 * the stack in its original form when we do the sigreturn here, by
	 * hand.
	 */
	__asm__("mov %0,%%esp ; movl %1, %%eax ; "
		"int $0x80" : : "a" (sc), "g" (__NR_sigreturn));
}
Commit	Line	Data
d67b569f JD	1	/*
	2	* Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
	3	* Licensed under the GPL
	4	*/
	5
30f7dabb	6	#include <asm/signal.h>
d67b569f JD	7	#include <asm/unistd.h>
	8	#include "uml-config.h"
	9	#include "sysdep/sigcontext.h"
	10	#include "sysdep/faultinfo.h"
	11
	12	void __attribute__ ((__section__ (".__syscall_stub")))
	13	stub_segv_handler(int sig)
	14	{
	15	struct sigcontext sc = (struct sigcontext ) (&sig + 1);
	16
	17	GET_FAULTINFO_FROM_SC(((struct faultinfo ) UML_CONFIG_STUB_DATA),
	18	sc);
	19
	20	__asm__("movl %0, %%eax ; int $0x80": : "g" (__NR_getpid));
	21	__asm__("movl %%eax, %%ebx ; movl %0, %%eax ; movl %1, %%ecx ;"
	22	"int $0x80": : "g" (__NR_kill), "g" (SIGUSR1));
9057e9de	23	/* Load pointer to sigcontext into esp, since we need to leave
d67b569f JD	24	* the stack in its original form when we do the sigreturn here, by
	25	* hand.
	26	*/
9057e9de BS	27	__asm__("mov %0,%%esp ; movl %1, %%eax ; "
9057e9de BS	28	"int $0x80" : : "a" (sc), "g" (__NR_sigreturn));
d67b569f	29	}