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/*
* Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
* Licensed under the GPL
*/
#include <asm/signal.h>
#include <linux/compiler.h>
#include <asm/unistd.h>
#include <asm/ucontext.h>
#include "uml-config.h"
#include "sysdep/sigcontext.h"
#include "sysdep/faultinfo.h"
void __attribute__ ((__section__ (".__syscall_stub")))
stub_segv_handler(int sig)
{
struct ucontext *uc;
__asm__("movq %%rdx, %0" : "=g" (uc) :);
GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA),
&uc->uc_mcontext);
__asm__("movq %0, %%rax ; syscall": : "g" (__NR_getpid));
__asm__("movq %%rax, %%rdi ; movq %0, %%rax ; movq %1, %%rsi ;"
"syscall": : "g" (__NR_kill), "g" (SIGUSR1));
/* Two popqs to restore the stack to the state just before entering
* the handler, one pops the return address, the other pops the frame
* pointer.
*/
__asm__("popq %%rax ; popq %%rax ; movq %0, %%rax ; syscall" : : "g"
(__NR_rt_sigreturn));
}
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