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