release/src-rt-6.x.4708/linux/linux-2.6.36/arch/um/sys-ppc/shared/sysdep/sigcontext.h

   1 /*
   2  * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __SYS_SIGCONTEXT_PPC_H
   7 #define __SYS_SIGCONTEXT_PPC_H
   8
   9 #define DSISR_WRITE 0x02000000
  10
  11 #define SC_FAULT_ADDR(sc) ({ \
  12                 struct sigcontext *_sc = (sc); \
  13                 long retval = -1; \
  14                 switch (_sc->regs->trap) { \
  15                 case 0x300: \
  16                         /* data exception */ \
  17                         retval = _sc->regs->dar; \
  18                         break; \
  19                 case 0x400: \
  20                         /* instruction exception */ \
  21                         retval = _sc->regs->nip; \
  22                         break; \
  23                 default: \
  24                         panic("SC_FAULT_ADDR: unhandled trap type\n"); \
  25                 } \
  26                 retval; \
  27         })
  28
  29 #define SC_FAULT_WRITE(sc) ({ \
  30                 struct sigcontext *_sc = (sc); \
  31                 long retval = -1; \
  32                 switch (_sc->regs->trap) { \
  33                 case 0x300: \
  34                         /* data exception */ \
  35                         retval = !!(_sc->regs->dsisr & DSISR_WRITE); \
  36                         break; \
  37                 case 0x400: \
  38                         /* instruction exception: not a write */ \
  39                         retval = 0; \
  40                         break; \
  41                 default: \
  42                         panic("SC_FAULT_ADDR: unhandled trap type\n"); \
  43                 } \
  44                 retval; \
  45         })
  46
  47 #define SC_IP(sc) ((sc)->regs->nip)
  48 #define SC_SP(sc) ((sc)->regs->gpr[1])
  49 #define SEGV_IS_FIXABLE(sc) (1)
  50
  51 #endif