arch/um/include/sysdep-i386/sigcontext.h

   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 "sc.h"
  10
  11 #define IP_RESTART_SYSCALL(ip) ((ip) -= 2)
  12
  13 #define SC_RESTART_SYSCALL(sc) IP_RESTART_SYSCALL(SC_IP(sc))
  14 #define SC_SET_SYSCALL_RETURN(sc, result) SC_EAX(sc) = (result)
  15
  16 #define SC_FAULT_ADDR(sc) SC_CR2(sc)
  17 #define SC_FAULT_TYPE(sc) SC_ERR(sc)
  18
  19 #define FAULT_WRITE(err) (err & 2)
  20 #define TO_SC_ERR(is_write) ((is_write) ? 2 : 0)
  21
  22 #define SC_FAULT_WRITE(sc) (FAULT_WRITE(SC_ERR(sc)))
  23
  24 #define SC_TRAP_TYPE(sc) SC_TRAPNO(sc)
  25
  26 /* ptrace expects that, at the start of a system call, %eax contains
  27  * -ENOSYS, so this makes it so.
  28  */
  29 #define SC_START_SYSCALL(sc) do SC_EAX(sc) = -ENOSYS; while(0)
  30
  31 /* This is Page Fault */
  32 #define SEGV_IS_FIXABLE(trap) (trap == 14)
  33
  34 #define SC_SEGV_IS_FIXABLE(sc) (SEGV_IS_FIXABLE(SC_TRAPNO(sc)))
  35
  36 extern unsigned long *sc_sigmask(void *sc_ptr);
  37 extern int sc_get_fpregs(unsigned long buf, void *sc_ptr);
  38
  39 #endif
  40 /*
  41  * Overrides for Emacs so that we follow Linus's tabbing style.
  42  * Emacs will notice this stuff at the end of the file and automatically
  43  * adjust the settings for this buffer only.  This must remain at the end
  44  * of the file.
  45  * ---------------------------------------------------------------------------
  46  * Local variables:
  47  * c-file-style: "linux"
  48  * End:
  49  */