sigcontext.h

Go to the documentation of this file.

/* 
 * Copyright (C) 2000 Jeff Dike ([email protected])
 * 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