gdb/config/mips/tm-irix5.h

   1 /* Target machine description for SGI Iris under Irix 5, for GDB.
   2    Copyright 1990, 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #include "mips/tm-irix3.h"
  21
  22 #if defined (_MIPS_SIM_NABI32) && _MIPS_SIM == _MIPS_SIM_NABI32
  23 /*
  24  * Irix 6 (n32 ABI) has 32-bit GP regs and 64-bit FP regs
  25  */
  26
  27 #undef  REGISTER_BYTES
  28 #define REGISTER_BYTES (MIPS_NUMREGS * 8 + (NUM_REGS - MIPS_NUMREGS) * MIPS_REGSIZE)
  29
  30 #undef  REGISTER_BYTE
  31 #define REGISTER_BYTE(N) \
  32      (((N) < FP0_REGNUM) ? (N) * MIPS_REGSIZE : \
  33       ((N) < FP0_REGNUM + 32) ?     \
  34       FP0_REGNUM * MIPS_REGSIZE + \
  35       ((N) - FP0_REGNUM) * sizeof(double) : \
  36       32 * sizeof(double) + ((N) - 32) * MIPS_REGSIZE)
  37
  38 #undef  REGISTER_VIRTUAL_TYPE
  39 #define REGISTER_VIRTUAL_TYPE(N) \
  40         (((N) >= FP0_REGNUM && (N) < FP0_REGNUM+32) ? builtin_type_double \
  41          : ((N) == 32 /*SR*/) ? builtin_type_uint32 \
  42          : ((N) >= 70 && (N) <= 89) ? builtin_type_uint32 \
  43          : builtin_type_int)
  44
  45 #undef  MIPS_LAST_ARG_REGNUM
  46 #define MIPS_LAST_ARG_REGNUM 11  /* N32 uses R4 through R11 for args */
  47
  48 #undef  MIPS_NUM_ARG_REGS
  49 #define MIPS_NUM_ARG_REGS 8
  50
  51 #endif /* N32 */
  52
  53 /* When calling functions on Irix 5 (or any MIPS SVR4 ABI compliant
  54    platform) $25 must hold the function address.  Dest_Reg is a macro
  55    used in CALL_DUMMY in tm-mips.h.  */
  56 #undef Dest_Reg
  57 #define Dest_Reg 25
  58
  59 /* The signal handler trampoline is called _sigtramp.  */
  60 #undef IN_SIGTRAMP
  61 #define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigtramp", name))
  62
  63 /* Irix 5 saves a full 64 bits for each register.  We skip 2 * 4 to
  64    get to the saved PC (the register mask and status register are both
  65    32 bits) and then another 4 to get to the lower 32 bits.  We skip
  66    the same 4 bytes, plus the 8 bytes for the PC to get to the
  67    registers, and add another 4 to get to the lower 32 bits.  We skip
  68    8 bytes per register.  */
  69 #undef SIGFRAME_PC_OFF
  70 #define SIGFRAME_PC_OFF         (SIGFRAME_BASE + 2 * 4 + 4)
  71 #undef SIGFRAME_REGSAVE_OFF
  72 #define SIGFRAME_REGSAVE_OFF    (SIGFRAME_BASE + 2 * 4 + 8 + 4)
  73 #undef SIGFRAME_FPREGSAVE_OFF
  74 #define SIGFRAME_FPREGSAVE_OFF  (SIGFRAME_BASE + 2 * 4 + 8 + 32 * 8 + 4)
  75 #define SIGFRAME_REG_SIZE       8