| Jeff Dike | d67b569 | 2005-07-07 17:56:49 -0700 | [diff] [blame] | 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 | } |