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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 <linux/compiler.h> |
8 | #include <asm/unistd.h> | |
30f7dabb | 9 | #include <asm/ucontext.h> |
d67b569f JD |
10 | #include "uml-config.h" |
11 | #include "sysdep/sigcontext.h" | |
12 | #include "sysdep/faultinfo.h" | |
13 | ||
14 | void __attribute__ ((__section__ (".__syscall_stub"))) | |
15 | stub_segv_handler(int sig) | |
16 | { | |
17 | struct ucontext *uc; | |
18 | ||
19 | __asm__("movq %%rdx, %0" : "=g" (uc) :); | |
20 | GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA), | |
21 | &uc->uc_mcontext); | |
22 | ||
23 | __asm__("movq %0, %%rax ; syscall": : "g" (__NR_getpid)); | |
24 | __asm__("movq %%rax, %%rdi ; movq %0, %%rax ; movq %1, %%rsi ;" | |
25 | "syscall": : "g" (__NR_kill), "g" (SIGUSR1)); | |
26 | /* Two popqs to restore the stack to the state just before entering | |
27 | * the handler, one pops the return address, the other pops the frame | |
28 | * pointer. | |
29 | */ | |
30 | __asm__("popq %%rax ; popq %%rax ; movq %0, %%rax ; syscall" : : "g" | |
31 | (__NR_rt_sigreturn)); | |
32 | } |