gdb/config/i386/tm-sun386.h

   1 /* Parameters for a Sun 386i target machine, for GDB, the GNU debugger.
   2    Copyright 1986, 1987, 1991, 1992, 1993, 1994, 1995, 1999, 2000
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #if !defined (TM_SUN386_H)
  23 #define TM_SUN386_H 1
  24
  25 #include "regcache.h"
  26 #include "i386/tm-i386.h"
  27
  28 #ifndef sun386
  29 #define sun386
  30 #endif
  31 #define SUNOS4
  32 #define USE_MACHINE_REG_H
  33
  34 /* Perhaps some day this will work even without the following #define */
  35 #define COFF_ENCAPSULATE
  36
  37 #ifdef COFF_ENCAPSULATE
  38 /* Avoid conflicts between our include files and <sys/exec.h>
  39    (maybe not needed anymore).  */
  40 #define _EXEC_
  41 #endif
  42
  43 /* sun386 ptrace seems unable to change the frame pointer */
  44 #define PTRACE_FP_BUG
  45
  46 /* Address of end of stack space.  */
  47
  48 #define STACK_END_ADDR 0xfc000000
  49
  50 /* Number of machine registers */
  51
  52 #undef  NUM_REGS
  53 #define NUM_REGS 35
  54
  55 /* Initializer for an array of names of registers.  There should be NUM_REGS
  56    strings in this initializer.  The order of the first 8 registers must match
  57    the compiler's numbering scheme (which is the same as the 386 scheme) also,
  58    this table must match regmap in i386-pinsn.c. */
  59
  60 #undef  REGISTER_NAMES
  61 #define REGISTER_NAMES { "gs", "fs", "es", "ds",                \
  62                          "edi", "esi", "ebp", "esp",            \
  63                          "ebx", "edx", "ecx", "eax",            \
  64                          "retaddr", "trapnum", "errcode", "ip", \
  65                          "cs", "ps", "sp", "ss",                \
  66                          "fst0", "fst1", "fst2", "fst3",        \
  67                          "fst4", "fst5", "fst6", "fst7",        \
  68                          "fctrl", "fstat", "ftag", "fip",       \
  69                          "fcs", "fopoff", "fopsel"              \
  70                          }
  71
  72 /* Register numbers of various important registers.
  73    Note that some of these values are "real" register numbers,
  74    and correspond to the general registers of the machine,
  75    and some are "phony" register numbers which are too large
  76    to be actual register numbers as far as the user is concerned
  77    but do serve to get the desired values when passed to read_register.  */
  78
  79 #undef  FP_REGNUM
  80 #define FP_REGNUM   6           /* (ebp) Contains address of executing stack frame */
  81 #undef  SP_REGNUM
  82 #define SP_REGNUM  18           /* (usp) Contains address of top of stack */
  83 #undef  PS_REGNUM
  84 #define PS_REGNUM  17           /* (ps)  Contains processor status */
  85 #undef  PC_REGNUM
  86 #define PC_REGNUM  15           /* (eip) Contains program counter */
  87 #undef  FP0_REGNUM
  88 #define FP0_REGNUM 20           /* Floating point register 0 */
  89 #undef  FPC_REGNUM
  90 #define FPC_REGNUM 28           /* 80387 control register */
  91
  92 /* Total amount of space needed to store our copies of the machine's
  93    register state, the array `registers'.  */
  94
  95 #undef  REGISTER_BYTES
  96 #define REGISTER_BYTES (20*4+8*10+7*4)
  97
  98 /* Index within `registers' of the first byte of the space for
  99    register N.  */
 100
 101 #undef  REGISTER_BYTE
 102 #define REGISTER_BYTE(N) \
 103  ((N) >= FPC_REGNUM ? (((N) - FPC_REGNUM) * 4) + 160    \
 104   : (N) >= FP0_REGNUM ? (((N) - FP0_REGNUM) * 10) + 80  \
 105   : (N) * 4)
 106
 107 /* Number of bytes of storage in the actual machine representation
 108    for register N.  */
 109
 110 #undef  REGISTER_RAW_SIZE
 111 #define REGISTER_RAW_SIZE(N) (((unsigned)((N) - FP0_REGNUM)) < 8 ? 10 : 4)
 112
 113 /* Number of bytes of storage in the program's representation
 114    for register N. */
 115
 116 #undef  REGISTER_VIRTUAL_SIZE
 117 #define REGISTER_VIRTUAL_SIZE(N) (((unsigned)((N) - FP0_REGNUM)) < 8 ? 8 : 4)
 118
 119 /* Nonzero if register N requires conversion
 120    from raw format to virtual format.  */
 121
 122 #undef  REGISTER_CONVERTIBLE
 123 #define REGISTER_CONVERTIBLE(N) (((unsigned)((N) - FP0_REGNUM)) < 8)
 124
 125 /* Convert data from raw format for register REGNUM in buffer FROM
 126    to virtual format with type TYPE in buffer TO.  */
 127
 128 #undef  REGISTER_CONVERT_TO_VIRTUAL
 129 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
 130 { \
 131   double val; \
 132   i387_to_double ((FROM), (char *)&val); \
 133   store_floating ((TO), TYPE_LENGTH (TYPE), val); \
 134 }
 135 extern void i387_to_double (char *, char *);
 136
 137 /* Convert data from virtual format with type TYPE in buffer FROM
 138    to raw format for register REGNUM in buffer TO.  */
 139
 140 #undef  REGISTER_CONVERT_TO_RAW
 141 #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
 142 { \
 143   double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
 144   double_to_i387((char *)&val, (TO)); \
 145 }
 146 extern void double_to_i387 (char *, char *);
 147
 148 /* Return the GDB type object for the "standard" data type
 149    of data in register N.  */
 150
 151 #undef  REGISTER_VIRTUAL_TYPE
 152 #define REGISTER_VIRTUAL_TYPE(N) \
 153  (((unsigned)((N) - FP0_REGNUM)) < 8 ? builtin_type_double : builtin_type_int)
 154
 155 /* Extract from an array REGBUF containing the (raw) register state
 156    a function return value of type TYPE, and copy that, in virtual format,
 157    into VALBUF.  */
 158
 159 #undef  EXTRACT_RETURN_VALUE
 160 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 161   memcpy (VALBUF, REGBUF + REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 11), TYPE_LENGTH (TYPE))
 162
 163 /* Write into appropriate registers a function return value
 164    of type TYPE, given in virtual format.  */
 165
 166 #undef  STORE_RETURN_VALUE
 167 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 168   write_register_bytes (REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 11), VALBUF, TYPE_LENGTH (TYPE))
 169
 170 /* Describe the pointer in each stack frame to the previous stack frame
 171    (its caller).  */
 172
 173 /* FRAME_CHAIN takes a frame's nominal address
 174    and produces the frame's chain-pointer. */
 175
 176 #undef  FRAME_CHAIN
 177 #define FRAME_CHAIN(thisframe) \
 178   (!inside_entry_file ((thisframe)->pc) ? \
 179    read_memory_integer ((thisframe)->frame, 4) :\
 180    0)
 181
 182 /* Define other aspects of the stack frame.  */
 183
 184 /* A macro that tells us whether the function invocation represented
 185    by FI does not have a frame on the stack associated with it.  If it
 186    does not, FRAMELESS is set to 1, else 0.  */
 187
 188 #undef  FRAMELESS_FUNCTION_INVOCATION
 189 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
 190      (frameless_look_for_prologue (FI))
 191
 192 #undef  FRAME_SAVED_PC
 193 #define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
 194
 195 /* Insert the specified number of args and function address
 196    into a call sequence of the above form stored at DUMMYNAME.  */
 197
 198 #undef  FIX_CALL_DUMMY
 199 #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p)   \
 200 { \
 201         *(int *)((char *)(dummyname) + 1) = (int)(fun) - (pc) - 5; \
 202 }
 203
 204 #endif /* !defined (TM_SUN386_H) */