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sigcontext.h

/* 
 * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
 * Licensed under the GPL
 */

#ifndef __SYS_SIGCONTEXT_PPC_H
#define __SYS_SIGCONTEXT_PPC_H

#define DSISR_WRITE 0x02000000

#define SC_FAULT_ADDR(sc) ({ \
            struct sigcontext *_sc = (sc); \
            long retval = -1; \
            switch (_sc->regs->trap) { \
            case 0x300: \
                  /* data exception */ \
                  retval = _sc->regs->dar; \
                  break; \
            case 0x400: \
                  /* instruction exception */ \
                  retval = _sc->regs->nip; \
                  break; \
            default: \
                  panic("SC_FAULT_ADDR: unhandled trap type\n"); \
            } \
            retval; \
      })

#define SC_FAULT_WRITE(sc) ({ \
            struct sigcontext *_sc = (sc); \
            long retval = -1; \
            switch (_sc->regs->trap) { \
            case 0x300: \
                  /* data exception */ \
                  retval = !!(_sc->regs->dsisr & DSISR_WRITE); \
                  break; \
            case 0x400: \
                  /* instruction exception: not a write */ \
                  retval = 0; \
                  break; \
            default: \
                  panic("SC_FAULT_ADDR: unhandled trap type\n"); \
            } \
            retval; \
      })

#define SC_IP(sc) ((sc)->regs->nip)
#define SC_SP(sc) ((sc)->regs->gpr[1])
#define SEGV_IS_FIXABLE(sc) (1)

#endif

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * Emacs will notice this stuff at the end of the file and automatically
 * adjust the settings for this buffer only.  This must remain at the end
 * of the file.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-file-style: "linux"
 * End:
 */

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