1/* 2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) 3 * Licensed under the GPL 4 */ 5 6#ifndef __SYS_SIGCONTEXT_I386_H 7#define __SYS_SIGCONTEXT_I386_H 8 9#include "uml-config.h" 10#include <sysdep/sc.h> 11 12#define IP_RESTART_SYSCALL(ip) ((ip) -= 2) 13 14#define SC_RESTART_SYSCALL(sc) IP_RESTART_SYSCALL(SC_IP(sc)) 15#define SC_SET_SYSCALL_RETURN(sc, result) SC_EAX(sc) = (result) 16 17#define GET_FAULTINFO_FROM_SC(fi,sc) \ 18 { \ 19 (fi).cr2 = SC_CR2(sc); \ 20 (fi).error_code = SC_ERR(sc); \ 21 (fi).trap_no = SC_TRAPNO(sc); \ 22 } 23 24/* ptrace expects that, at the start of a system call, %eax contains 25 * -ENOSYS, so this makes it so. 26 */ 27#define SC_START_SYSCALL(sc) do SC_EAX(sc) = -ENOSYS; while(0) 28 29/* This is Page Fault */ 30#define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14) 31 32/* SKAS3 has no trap_no on i386, but get_skas_faultinfo() sets it to 0. */ 33#ifdef UML_CONFIG_MODE_SKAS 34#define SEGV_MAYBE_FIXABLE(fi) ((fi)->trap_no == 0 && ptrace_faultinfo) 35#else 36#define SEGV_MAYBE_FIXABLE(fi) 0 37#endif 38 39extern unsigned long *sc_sigmask(void *sc_ptr); 40extern int sc_get_fpregs(unsigned long buf, void *sc_ptr); 41 42#endif 43/* 44 * Overrides for Emacs so that we follow Linus's tabbing style. 45 * Emacs will notice this stuff at the end of the file and automatically 46 * adjust the settings for this buffer only. This must remain at the end 47 * of the file. 48 * --------------------------------------------------------------------------- 49 * Local variables: 50 * c-file-style: "linux" 51 * End: 52 */ 53