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 /* If we're being built for n32, enable multi-arch. */
  22 /* FIXME: cagney/2000-04-04: Testing the _MIPS_SIM_NABI32 and
  23    _MIPS_SIM in a tm-*.h file is simply wrong!  Those are
  24    host-dependant macros (provided by /usr/include) and stop any
  25    chance of the target being cross compiled */
  26 #if 0 && defined (_MIPS_SIM_NABI32) && _MIPS_SIM == _MIPS_SIM_NABI32
  27 /* FIXME: Don't enable multi-arch for IRIX/n32.  The test
  28    ``gdb.base/corefile.exp: up in corefile.exp'' fails.  */
  29 #define GDB_MULTI_ARCH 1
  30 #endif
  31
  32 #include "mips/tm-irix3.h"
  33
  34 /* FIXME: cagney/2000-04-04: Testing the _MIPS_SIM_NABI32 and
  35    _MIPS_SIM in a tm-*.h file is simply wrong!  Those are
  36    host-dependant macros (provided by /usr/include) and stop any
  37    chance of the target being cross compiled */
  38 #if defined (_MIPS_SIM_NABI32) && _MIPS_SIM == _MIPS_SIM_NABI32
  39 /*
  40  * Irix 6 (n32 ABI) has 32-bit GP regs and 64-bit FP regs
  41  */
  42
  43 #undef  REGISTER_BYTES
  44 #define REGISTER_BYTES (MIPS_NUMREGS * 8 + (NUM_REGS - MIPS_NUMREGS) * MIPS_REGSIZE)
  45
  46 #undef  REGISTER_BYTE
  47 #define REGISTER_BYTE(N) \
  48      (((N) < FP0_REGNUM) ? (N) * MIPS_REGSIZE : \
  49       ((N) < FP0_REGNUM + 32) ?     \
  50       FP0_REGNUM * MIPS_REGSIZE + \
  51       ((N) - FP0_REGNUM) * sizeof(double) : \
  52       32 * sizeof(double) + ((N) - 32) * MIPS_REGSIZE)
  53
  54 #undef  REGISTER_VIRTUAL_TYPE
  55 #define REGISTER_VIRTUAL_TYPE(N) \
  56         (((N) >= FP0_REGNUM && (N) < FP0_REGNUM+32) ? builtin_type_double \
  57          : ((N) == 32 /*SR*/) ? builtin_type_uint32 \
  58          : ((N) >= 70 && (N) <= 89) ? builtin_type_uint32 \
  59          : builtin_type_int)
  60
  61 #undef  MIPS_LAST_ARG_REGNUM
  62 #define MIPS_LAST_ARG_REGNUM 11 /* N32 uses R4 through R11 for args */
  63
  64 /* MIPS_STACK_ARGSIZE -- how many bytes does a pushed function arg take
  65    up on the stack? For the n32 ABI, eight bytes are reserved for each
  66    register. Like MIPS_SAVED_REGSIZE but different. */
  67 #define MIPS_DEFAULT_STACK_ARGSIZE 8
  68
  69 /* N32 does not reserve home space for registers used to carry
  70    parameters. */
  71 #define MIPS_REGS_HAVE_HOME_P 0
  72
  73 /* Force N32 ABI as the default. */
  74 #define MIPS_DEFAULT_ABI MIPS_ABI_N32
  75
  76 #endif /* N32 */
  77
  78
  79 /* The signal handler trampoline is called _sigtramp.  */
  80 #undef IN_SIGTRAMP
  81 #define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigtramp", name))
  82
  83 /* Irix 5 saves a full 64 bits for each register.  We skip 2 * 4 to
  84    get to the saved PC (the register mask and status register are both
  85    32 bits) and then another 4 to get to the lower 32 bits.  We skip
  86    the same 4 bytes, plus the 8 bytes for the PC to get to the
  87    registers, and add another 4 to get to the lower 32 bits.  We skip
  88    8 bytes per register.  */
  89 #undef SIGFRAME_PC_OFF
  90 #define SIGFRAME_PC_OFF         (SIGFRAME_BASE + 2 * 4 + 4)
  91 #undef SIGFRAME_REGSAVE_OFF
  92 #define SIGFRAME_REGSAVE_OFF    (SIGFRAME_BASE + 2 * 4 + 8 + 4)
  93 #undef SIGFRAME_FPREGSAVE_OFF
  94 #define SIGFRAME_FPREGSAVE_OFF  (SIGFRAME_BASE + 2 * 4 + 8 + 32 * 8 + 4)
  95 #define SIGFRAME_REG_SIZE       8