arch/um/sys-i386/shared/sysdep/sigcontext.h

   1 /*
   2  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __SYS_SIGCONTEXT_I386_H
   7 #define __SYS_SIGCONTEXT_I386_H
   8
   9 #include <generated/user_constants.h>
  10
  11 #define IP_RESTART_SYSCALL(ip) ((ip) -= 2)
  12
  13 #define SC_OFFSET(sc, field) \
  14         *((unsigned long *) &(((char *) (sc))[HOST_##field]))
  15
  16 #define SC_TRAPNO(sc) SC_OFFSET(sc, SC_TRAPNO)
  17 #define SC_ERR(sc) SC_OFFSET(sc, SC_ERR)
  18 #define SC_CR2(sc) SC_OFFSET(sc, SC_CR2)
  19
  20 #define GET_FAULTINFO_FROM_SC(fi, sc) \
  21         { \
  22                 (fi).cr2 = SC_CR2(sc); \
  23                 (fi).error_code = SC_ERR(sc); \
  24                 (fi).trap_no = SC_TRAPNO(sc); \
  25         }
  26
  27 /* This is Page Fault */
  28 #define SEGV_IS_FIXABLE(fi)     ((fi)->trap_no == 14)
  29
  30 /* SKAS3 has no trap_no on i386, but get_skas_faultinfo() sets it to 0. */
  31 #define SEGV_MAYBE_FIXABLE(fi)  ((fi)->trap_no == 0 && ptrace_faultinfo)
  32
  33 #endif