usr/src/sys/sparc/include/signal.h

/*
 * Copyright (c) 1992 The Regents of the University of California.
 * All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Lawrence Berkeley Laboratories.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)signal.h    7.2 (Berkeley) %G%
 *
 * from: $Header: signal.h,v 1.4 92/06/17 06:10:28 torek Exp $
 */

#ifndef LOCORE
/*
 * Information pushed on stack when a signal is delivered.
 * This is used by the kernel to restore state following
 * execution of the signal handler.  It is also made available
 * to the handler to allow it to restore state properly if
 * a non-standard exit is performed.
 *
 * All machines must have an sc_onstack and sc_mask.
 */
struct sigcontext {
        int     sc_onstack;             /* sigstack state to restore */
        int     sc_mask;                /* signal mask to restore */
        /* begin machine dependent portion */
        int     sc_sp;                  /* %sp to restore */
        int     sc_pc;                  /* pc to restore */
        int     sc_npc;                 /* npc to restore */
        int     sc_psr;                 /* psr to restore */
        int     sc_g1;                  /* %g1 to restore */
        int     sc_o0;                  /* %o0 to restore */
};
#else /* LOCORE */
#define SC_SP_OFFSET    8
#define SC_PC_OFFSET    12
#define SC_NPC_OFFSET   16
#define SC_PSR_OFFSET   20
#define SC_G1_OFFSET    24
#define SC_O0_OFFSET    28
#endif /* LOCORE */

/*
 * `Code' arguments to signal handlers.  The names, and the funny numbering.
 * are defined so as to match up with what SunOS uses; I have no idea why
 * they did the numbers that way, except maybe to match up with the 68881.
 */
#define FPE_INTOVF_TRAP         0x01    /* integer overflow */
#define FPE_INTDIV_TRAP         0x14    /* integer divide by zero */
#define FPE_FLTINEX_TRAP        0xc4    /* inexact */
#define FPE_FLTDIV_TRAP         0xc8    /* divide by zero */
#define FPE_FLTUND_TRAP         0xcc    /* underflow */
#define FPE_FLTOPERR_TRAP       0xd0    /* operand error */
#define FPE_FLTOVF_TRAP         0xd4    /* overflow */