gdb/config/mips/tm-irix5.h

   1 /* Target machine description for SGI Iris under Irix 5, for GDB.
   2    Copyright 1990-1993, 1995, 2000 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,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "mips/tm-irix3.h"
  22
  23 /* FIXME: cagney/2000-04-04: Testing the _MIPS_SIM_NABI32 and
  24    _MIPS_SIM in a tm-*.h file is simply wrong!  Those are
  25    host-dependant macros (provided by /usr/include) and stop any
  26    chance of the target being cross compiled */
  27 #if defined (_MIPS_SIM_NABI32) && _MIPS_SIM == _MIPS_SIM_NABI32
  28 /*
  29  * Irix 6 (n32 ABI) has 32-bit GP regs and 64-bit FP regs
  30  */
  31
  32 #undef  REGISTER_BYTES
  33 #define REGISTER_BYTES (MIPS_NUMREGS * 8 + (NUM_REGS - MIPS_NUMREGS) * MIPS_REGSIZE)
  34
  35 #undef  REGISTER_BYTE
  36 #define REGISTER_BYTE(N) \
  37      (((N) < FP0_REGNUM) ? (N) * MIPS_REGSIZE : \
  38       ((N) < FP0_REGNUM + 32) ?     \
  39       FP0_REGNUM * MIPS_REGSIZE + \
  40       ((N) - FP0_REGNUM) * sizeof(double) : \
  41       32 * sizeof(double) + ((N) - 32) * MIPS_REGSIZE)
  42
  43 #undef  REGISTER_VIRTUAL_TYPE
  44 #define REGISTER_VIRTUAL_TYPE(N) \
  45         (((N) >= FP0_REGNUM && (N) < FP0_REGNUM+32) ? builtin_type_double \
  46          : ((N) == 32 /*SR*/) ? builtin_type_uint32 \
  47          : ((N) >= 70 && (N) <= 89) ? builtin_type_uint32 \
  48          : builtin_type_int)
  49
  50 #undef  MIPS_LAST_ARG_REGNUM
  51 #define MIPS_LAST_ARG_REGNUM 11 /* N32 uses R4 through R11 for args */
  52
  53 /* MIPS_STACK_ARGSIZE -- how many bytes does a pushed function arg take
  54    up on the stack? For the n32 ABI, eight bytes are reserved for each
  55    register. Like MIPS_SAVED_REGSIZE but different. */
  56 #define MIPS_DEFAULT_STACK_ARGSIZE 8
  57
  58 /* N32 does not reserve home space for registers used to carry
  59    parameters. */
  60 #define MIPS_REGS_HAVE_HOME_P 0
  61
  62 /* Force N32 ABI as the default. */
  63 #define MIPS_DEFAULT_ABI MIPS_ABI_N32
  64
  65 #endif /* N32 */
  66
  67
  68 /* The signal handler trampoline is called _sigtramp.  */
  69 #undef IN_SIGTRAMP
  70 #define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigtramp", name))
  71
  72 /* Irix 5 saves a full 64 bits for each register.  We skip 2 * 4 to
  73    get to the saved PC (the register mask and status register are both
  74    32 bits) and then another 4 to get to the lower 32 bits.  We skip
  75    the same 4 bytes, plus the 8 bytes for the PC to get to the
  76    registers, and add another 4 to get to the lower 32 bits.  We skip
  77    8 bytes per register.  */
  78 #undef SIGFRAME_PC_OFF
  79 #define SIGFRAME_PC_OFF         (SIGFRAME_BASE + 2 * 4 + 4)
  80 #undef SIGFRAME_REGSAVE_OFF
  81 #define SIGFRAME_REGSAVE_OFF    (SIGFRAME_BASE + 2 * 4 + 8 + 4)
  82 #undef SIGFRAME_FPREGSAVE_OFF
  83 #define SIGFRAME_FPREGSAVE_OFF  (SIGFRAME_BASE + 2 * 4 + 8 + 32 * 8 + 4)
  84 #define SIGFRAME_REG_SIZE       8