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/* Target machine description for SGI Iris under Irix 6.x, for GDB.

   Copyright 2001

   Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include "mips/tm-bigmips.h"

/* SGI's assembler doesn't grok dollar signs in identifiers.

   So we use dots instead.  This item must be coordinated with G++. */

#undef CPLUS_MARKER

#define CPLUS_MARKER '.'

/* Redefine register numbers for SGI. */

#undef NUM_REGS

#undef MIPS_REGISTER_NAMES

#undef FP0_REGNUM

#undef PC_REGNUM

#undef HI_REGNUM

#undef LO_REGNUM

#undef CAUSE_REGNUM

#undef BADVADDR_REGNUM

#undef FCRCS_REGNUM

#undef FCRIR_REGNUM

#undef FP_REGNUM

/* Number of machine registers */

#define NUM_REGS 71

/* Initializer for an array of names of registers.

   There should be NUM_REGS strings in this initializer.  */

#define MIPS_REGISTER_NAMES     \

    {   "zero", "at",   "v0",   "v1",   "a0",   "a1",   "a2",   "a3", \

        "a4",   "a5",   "a6",   "a7",   "t0",   "t1",   "t2",   "t3", \

        "s0",   "s1",   "s2",   "s3",   "s4",   "s5",   "s6",   "s7", \

        "t8",   "t9",   "k0",   "k1",   "gp",   "sp",   "s8",   "ra", \

        "f0",   "f1",   "f2",   "f3",   "f4",   "f5",   "f6",   "f7", \

        "f8",   "f9",   "f10",  "f11",  "f12",  "f13",  "f14",  "f15", \

        "f16",  "f17",  "f18",  "f19",  "f20",  "f21",  "f22",  "f23",\

        "f24",  "f25",  "f26",  "f27",  "f28",  "f29",  "f30",  "f31",\

        "pc",   "cause", "bad", "hi",   "lo",   "fsr",  "fir" \

    }

/* Register numbers of various important registers.

   Note that some of these values are "real" register numbers,

   and correspond to the general registers of the machine,

   and some are "phony" register numbers which are too large

   to be actual register numbers as far as the user is concerned

   but do serve to get the desired values when passed to read_register.  */

#define FP0_REGNUM 32           /* Floating point register 0 (single float) */

#define PC_REGNUM 64            /* Contains program counter */

#define CAUSE_REGNUM 65         /* describes last exception */

#define BADVADDR_REGNUM 66      /* bad vaddr for addressing exception */

#define HI_REGNUM 67            /* Multiple/divide temp */

#define LO_REGNUM 68            /* ... */

#define FCRCS_REGNUM 69         /* FP control/status */

#define FCRIR_REGNUM 70         /* FP implementation/revision */

#define FP_REGNUM 30            /* S8 register is the Frame Pointer */

#undef  REGISTER_BYTES

#define REGISTER_BYTES (MIPS_NUMREGS * 8 + (NUM_REGS - MIPS_NUMREGS) * MIPS_REGSIZE)

#undef  REGISTER_BYTE

#define REGISTER_BYTE(N) \

     (((N) < FP0_REGNUM) ? (N) * MIPS_REGSIZE : \

      ((N) < FP0_REGNUM + 32) ?     \

      FP0_REGNUM * MIPS_REGSIZE + \

      ((N) - FP0_REGNUM) * sizeof(double) : \

      32 * sizeof(double) + ((N) - 32) * MIPS_REGSIZE)

#undef  REGISTER_VIRTUAL_TYPE

#define REGISTER_VIRTUAL_TYPE(N) \

        (((N) >= FP0_REGNUM && (N) < FP0_REGNUM+32) ? builtin_type_double \

         : ((N) == 32 /*SR*/) ? builtin_type_uint32 \

         : ((N) >= 70 && (N) <= 89) ? builtin_type_uint32 \

         : builtin_type_int)

#undef  MIPS_LAST_ARG_REGNUM

#define MIPS_LAST_ARG_REGNUM 11 /* N32 uses R4 through R11 for args */

/* MIPS_STACK_ARGSIZE -- how many bytes does a pushed function arg take

   up on the stack? For the n32 ABI, eight bytes are reserved for each

   register. Like MIPS_SAVED_REGSIZE but different. */

#define MIPS_DEFAULT_STACK_ARGSIZE 8

/* N32 does not reserve home space for registers used to carry

   parameters. */

#define MIPS_REGS_HAVE_HOME_P 0

/* Force N32 ABI as the default. */

#define MIPS_DEFAULT_ABI MIPS_ABI_N32

/* The signal handler trampoline is called _sigtramp.  */

#undef IN_SIGTRAMP

#define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigtramp", name))

/* Offsets for register values in _sigtramp frame.

   sigcontext is immediately above the _sigtramp frame on Irix.  */

#undef SIGFRAME_BASE

#define SIGFRAME_BASE           0

/* Irix 5 saves a full 64 bits for each register.  We skip 2 * 4 to

   get to the saved PC (the register mask and status register are both

   32 bits) and then another 4 to get to the lower 32 bits.  We skip

   the same 4 bytes, plus the 8 bytes for the PC to get to the

   registers, and add another 4 to get to the lower 32 bits.  We skip

   8 bytes per register.  */

#undef SIGFRAME_PC_OFF

#define SIGFRAME_PC_OFF         (SIGFRAME_BASE + 2 * 4 + 4)

#undef SIGFRAME_REGSAVE_OFF

#define SIGFRAME_REGSAVE_OFF    (SIGFRAME_BASE + 2 * 4 + 8 + 4)

#undef SIGFRAME_FPREGSAVE_OFF

#define SIGFRAME_FPREGSAVE_OFF  (SIGFRAME_BASE + 2 * 4 + 8 + 32 * 8 + 4)

#define SIGFRAME_REG_SIZE       8

/* Select the disassembler */

#undef TM_PRINT_INSN_MACH

#define TM_PRINT_INSN_MACH bfd_mach_mips8000