[mirror_ubuntu-bionic-kernel.git] / arch / um / sys-i386 / stub_segv.c

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

#include <signal.h>
#include <asm/sigcontext.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));
	/* Pop the frame pointer and return address since we need to leave
	 * the stack in its original form when we do the sigreturn here, by
	 * hand.
	 */
	__asm__("popl %%eax ; popl %%eax ; popl %%eax ; movl %0, %%eax ; "
		"int $0x80" : : "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
	6	#include <signal.h>
	7	#include <asm/sigcontext.h>
	8	#include <asm/unistd.h>
	9	#include "uml-config.h"
	10	#include "sysdep/sigcontext.h"
	11	#include "sysdep/faultinfo.h"
	12
	13	void __attribute__ ((__section__ (".__syscall_stub")))
	14	stub_segv_handler(int sig)
	15	{
	16	struct sigcontext sc = (struct sigcontext ) (&sig + 1);
	17
	18	GET_FAULTINFO_FROM_SC(((struct faultinfo ) UML_CONFIG_STUB_DATA),
	19	sc);
	20
	21	__asm__("movl %0, %%eax ; int $0x80": : "g" (__NR_getpid));
	22	__asm__("movl %%eax, %%ebx ; movl %0, %%eax ; movl %1, %%ecx ;"
	23	"int $0x80": : "g" (__NR_kill), "g" (SIGUSR1));
	24	/* Pop the frame pointer and return address since we need to leave
	25	* the stack in its original form when we do the sigreturn here, by
	26	* hand.
	27	*/
	28	__asm__("popl %%eax ; popl %%eax ; popl %%eax ; movl %0, %%eax ; "
	29	"int $0x80" : : "g" (__NR_sigreturn));
	30	}