gdb/config/sh/tm-sh.h

   1 /* Parameters for execution on a Hitachi Super-H machine.
   2    Copyright (C) 1993 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 /* Contributed by Steve Chamberlain sac@cygnus.com */
  21
  22 #define GDB_TARGET_IS_SH
  23
  24 #define IEEE_FLOAT 1
  25
  26 /* Define the bit, byte, and word ordering of the machine.  */
  27
  28 #define TARGET_BYTE_ORDER_SELECTABLE
  29
  30
  31 /* Offset from address of function to start of its code.
  32    Zero on most machines.  */
  33
  34 #define FUNCTION_START_OFFSET 0
  35
  36 /* Advance PC across any function entry prologue instructions
  37    to reach some "real" code.  */
  38
  39 extern CORE_ADDR sh_skip_prologue ();
  40 #define SKIP_PROLOGUE(ip) \
  41     {(ip) = sh_skip_prologue(ip);}
  42
  43
  44 /* Immediately after a function call, return the saved pc.
  45    Can't always go through the frames for this because on some machines
  46    the new frame is not set up until the new function executes
  47    some instructions.
  48
  49    The return address is the value saved in the PR register + 4  */
  50
  51 #define SAVED_PC_AFTER_CALL(frame) \
  52   (ADDR_BITS_REMOVE(read_register(PR_REGNUM))+4)
  53
  54 /* Stack grows downward.  */
  55
  56 #define INNER_THAN <
  57
  58 /* Illegal instruction - used by the simulator for breakpoint
  59    detection */
  60
  61 #define BREAKPOINT {0xc3, 0xc3}  /* 0xc3c3 is trapa #c3, and it works in big
  62                                     and little endian modes  */
  63 #define REMOTE_BREAKPOINT { 0xc3, 0x20}
  64
  65 /* If your kernel resets the pc after the trap happens you may need to
  66    define this before including this file.  */
  67 #define DECR_PC_AFTER_BREAK 0
  68
  69 /* Nonzero if instruction at PC is a return instruction.  */
  70 #define ABOUT_TO_RETURN(pc) (read_memory_integer(pc,2) == 0x000b)
  71
  72 /* Say how long registers are.  */
  73 #define REGISTER_TYPE  long
  74
  75 /* Say how much memory is needed to store a copy of the register set */
  76 #define REGISTER_BYTES    (NUM_REGS*4)
  77
  78 /* Index within `registers' of the first byte of the space for
  79    register N.  */
  80
  81 #define REGISTER_BYTE(N)  ((N)*4)
  82
  83 /* Number of bytes of storage in the actual machine representation
  84    for register N.  */
  85
  86 #define REGISTER_RAW_SIZE(N) 4
  87
  88 #define REGISTER_VIRTUAL_SIZE(N) 4
  89
  90 /* Largest value REGISTER_RAW_SIZE can have.  */
  91
  92 #define MAX_REGISTER_RAW_SIZE 4
  93
  94 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
  95
  96 #define MAX_REGISTER_VIRTUAL_SIZE 4
  97
  98 /* Return the GDB type object for the "standard" data type
  99    of data in register N.  */
 100
 101 #define REGISTER_VIRTUAL_TYPE(N) builtin_type_int
 102 /* start-sanitize-sh3e */
 103 #undef  REGISTER_VIRTUAL_TYPE
 104 #define REGISTER_VIRTUAL_TYPE(N) \
 105         ((((N) >= FP0_REGNUM && (N) < FP0_REGNUM+32)    \
 106           || (N) == FPUL_REGNUM)                        \
 107          ? builtin_type_float : builtin_type_int)
 108 /* end-sanitize-sh3e */
 109
 110 /* Initializer for an array of names of registers.
 111    Entries beyond the first NUM_REGS are ignored.  */
 112
 113 #define REGISTER_NAMES \
 114   {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
 115    "r8", "r9", "r10","r11","r12","r13","r14","r15",\
 116    "pc", "pr","gbr","vbr","mach","macl","sr","ticks","stalls","cycles","insts" ,"plr","tlr"    }
 117 /* start-sanitize-sh3e */
 118 #undef REGISTER_NAMES
 119 #define REGISTER_NAMES \
 120   {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
 121    "r8", "r9", "r10","r11","r12","r13","r14","r15",\
 122    "pc", "pr","gbr","vbr","mach","macl", "sr", "fpul", "fpscr", \
 123    "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", \
 124    "fr8", "fr9", "fr10","fr11","fr12","fr13","fr14","fr15",\
 125   }
 126 /* end-sanitize-sh3e */
 127
 128 #define NUM_REGS 28
 129 /* start-sanitize-sh3e */
 130 #undef  NUM_REGS
 131 #define NUM_REGS 41
 132 /* end-sanitize-sh3e */
 133
 134 /* Register numbers of various important registers.
 135    Note that some of these values are "real" register numbers,
 136    and correspond to the general registers of the machine,
 137    and some are "phony" register numbers which are too large
 138    to be actual register numbers as far as the user is concerned
 139    but do serve to get the desired values when passed to read_register.  */
 140
 141 #define R0_REGNUM       0
 142 #define FP_REGNUM       14
 143 #define SP_REGNUM       15
 144 #define PC_REGNUM       16
 145 #define PR_REGNUM       17
 146 #define GBR_REGNUM      18
 147 #define VBR_REGNUM      19
 148 #define MACH_REGNUM     20
 149 #define MACL_REGNUM     21
 150 #define SR_REGNUM       22
 151 #define NUM_REALREGS    23
 152 /* start-sanitize-sh3e */
 153 #define FPUL_REGNUM     23
 154 #define FP0_REGNUM      25
 155 #undef  NUM_REALREGS
 156 #define NUM_REALREGS    41
 157 /* end-sanitize-sh3e */
 158
 159 /* Store the address of the place in which to copy the structure the
 160    subroutine will return.  This is called from call_function.
 161
 162    We store structs through a pointer passed in R4 */
 163
 164 #define STORE_STRUCT_RETURN(ADDR, SP) \
 165     { write_register (4, (ADDR));  }
 166
 167 /* Extract from an array REGBUF containing the (raw) register state
 168    a function return value of type TYPE, and copy that, in virtual format,
 169    into VALBUF.  */
 170
 171 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 172   memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE))
 173
 174
 175 /* Write into appropriate registers a function return value
 176    of type TYPE, given in virtual format.
 177
 178    Things always get returned in R4/R5 */
 179
 180 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 181   write_register_bytes (REGISTER_BYTE(4), VALBUF, TYPE_LENGTH (TYPE))
 182
 183
 184 /* Extract from an array REGBUF containing the (raw) register state
 185    the address in which a function should return its structure value,
 186    as a CORE_ADDR (or an expression that can be used as one).  */
 187
 188 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
 189 \f
 190
 191 /* Define other aspects of the stack frame.
 192    we keep a copy of the worked out return pc lying around, since it
 193    is a useful bit of info */
 194
 195 #define EXTRA_FRAME_INFO \
 196     CORE_ADDR return_pc; \
 197     int leaf_function;   \
 198     int f_offset;
 199
 200 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
 201     init_extra_frame_info(fromleaf, fi)
 202
 203 /* A macro that tells us whether the function invocation represented
 204    by FI does not have a frame on the stack associated with it.  If it
 205    does not, FRAMELESS is set to 1, else 0.  */
 206
 207 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 208   (FRAMELESS) = frameless_look_for_prologue(FI)
 209
 210 #define FRAME_CHAIN(FRAME)       sh_frame_chain(FRAME)
 211 #define FRAME_SAVED_PC(FRAME)    ((FRAME)->return_pc)
 212 #define FRAME_ARGS_ADDRESS(fi)   (fi)->frame
 213 #define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
 214
 215 /* Set VAL to the number of args passed to frame described by FI.
 216    Can set VAL to -1, meaning no way to tell.  */
 217
 218 /* We can't tell how many args there are */
 219
 220 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 221
 222 /* Return number of bytes at start of arglist that are not really args.  */
 223
 224 #define FRAME_ARGS_SKIP 0
 225
 226 /* Put here the code to store, into a struct frame_saved_regs,
 227    the addresses of the saved registers of frame described by FRAME_INFO.
 228    This includes special registers such as pc and fp saved in special
 229    ways in the stack frame.  sp is even more special:
 230    the address we return for it IS the sp for the next frame.  */
 231
 232 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 233    frame_find_saved_regs(frame_info, &(frame_saved_regs))
 234
 235 #define NAMES_HAVE_UNDERSCORE
 236
 237 typedef unsigned short INSN_WORD;
 238
 239 #define ADDR_BITS_REMOVE(addr) ((addr))
 240
 241 #define CALL_DUMMY_LENGTH 10
 242
 243 /* Discard from the stack the innermost frame,
 244    restoring all saved registers.  */
 245
 246 #define POP_FRAME pop_frame();
 247
 248
 249 #define NOP   {0x20, 0x0b}
 250
 251 #define REGISTER_SIZE 4
 252