gdb/config/sh/tm-sh.h

   1 /* Target-specific definition for a Hitachi Super-H.
   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)))
  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
  64 #define BIG_REMOTE_BREAKPOINT    { 0xc3, 0x20 }
  65 #define LITTLE_REMOTE_BREAKPOINT { 0x20, 0xc3 }
  66
  67 /* If your kernel resets the pc after the trap happens you may need to
  68    define this before including this file.  */
  69 #define DECR_PC_AFTER_BREAK 0
  70
  71 /* Nonzero if instruction at PC is a return instruction.  */
  72 #define ABOUT_TO_RETURN(pc) (read_memory_integer(pc,2) == 0x000b)
  73
  74 /* Say how long registers are.  */
  75 #define REGISTER_TYPE  long
  76
  77 /* Say how much memory is needed to store a copy of the register set */
  78 #define REGISTER_BYTES    (NUM_REGS*4)
  79
  80 /* Index within `registers' of the first byte of the space for
  81    register N.  */
  82
  83 #define REGISTER_BYTE(N)  ((N)*4)
  84
  85 /* Number of bytes of storage in the actual machine representation
  86    for register N.  */
  87
  88 #define REGISTER_RAW_SIZE(N) 4
  89
  90 #define REGISTER_VIRTUAL_SIZE(N) 4
  91
  92 /* Largest value REGISTER_RAW_SIZE can have.  */
  93
  94 #define MAX_REGISTER_RAW_SIZE 4
  95
  96 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
  97
  98 #define MAX_REGISTER_VIRTUAL_SIZE 4
  99
 100 /* Return the GDB type object for the "standard" data type
 101    of data in register N.  */
 102
 103 #define REGISTER_VIRTUAL_TYPE(N) \
 104         ((((N) >= FP0_REGNUM && (N) < FP15_REGNUM)      \
 105           || (N) == FPUL_REGNUM)                        \
 106          ? builtin_type_float : builtin_type_int)
 107
 108 /* Initializer for an array of names of registers.
 109    Entries beyond the first NUM_REGS are ignored.  */
 110
 111 #define REGISTER_NAMES \
 112   {"r0", "r1", "r2", "r3", "r4",  "r5",  "r6", "r7", \
 113    "r8", "r9", "r10","r11","r12", "r13", "r14","r15",\
 114    "pc", "pr", "gbr","vbr","mach","macl","sr", \
 115    "fpul","fpscr", \
 116    "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", \
 117    "fr8", "fr9", "fr10","fr11","fr12","fr13","fr14","fr15",\
 118    "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", \
 119    "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1" \
 120   }
 121
 122 #define NUM_REGS 57
 123
 124 /* Register numbers of various important registers.
 125    Note that some of these values are "real" register numbers,
 126    and correspond to the general registers of the machine,
 127    and some are "phony" register numbers which are too large
 128    to be actual register numbers as far as the user is concerned
 129    but do serve to get the desired values when passed to read_register.  */
 130
 131 #define R0_REGNUM       0
 132 #define FP_REGNUM       14
 133 #define SP_REGNUM       15
 134 #define PC_REGNUM       16
 135 #define PR_REGNUM       17
 136 #define GBR_REGNUM      18
 137 #define VBR_REGNUM      19
 138 #define MACH_REGNUM     20
 139 #define MACL_REGNUM     21
 140 #define SR_REGNUM       22
 141 #define NUM_REALREGS    23
 142 #define FPUL_REGNUM     23
 143 #define FP0_REGNUM      25
 144 #define FP15_REGNUM     41
 145 #undef  NUM_REALREGS
 146 #define NUM_REALREGS    57
 147
 148 /* Store the address of the place in which to copy the structure the
 149    subroutine will return.  This is called from call_function.
 150
 151    We store structs through a pointer passed in R4 */
 152
 153 #define STORE_STRUCT_RETURN(ADDR, SP) \
 154     { write_register (4, (ADDR));  }
 155
 156 /* Extract from an array REGBUF containing the (raw) register state
 157    a function return value of type TYPE, and copy that, in virtual format,
 158    into VALBUF.  */
 159
 160 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 161   memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE))
 162
 163
 164 /* Write into appropriate registers a function return value
 165    of type TYPE, given in virtual format.
 166
 167    Things always get returned in R4/R5 */
 168
 169 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 170   write_register_bytes (REGISTER_BYTE(4), VALBUF, TYPE_LENGTH (TYPE))
 171
 172
 173 /* Extract from an array REGBUF containing the (raw) register state
 174    the address in which a function should return its structure value,
 175    as a CORE_ADDR (or an expression that can be used as one).  */
 176
 177 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
 178 \f
 179
 180 /* Define other aspects of the stack frame.
 181    we keep a copy of the worked out return pc lying around, since it
 182    is a useful bit of info */
 183
 184 #define EXTRA_FRAME_INFO \
 185     CORE_ADDR return_pc; \
 186     int leaf_function;   \
 187     int f_offset;
 188
 189 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
 190     init_extra_frame_info(fromleaf, fi)
 191
 192 /* A macro that tells us whether the function invocation represented
 193    by FI does not have a frame on the stack associated with it.  If it
 194    does not, FRAMELESS is set to 1, else 0.  */
 195
 196 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 197   (FRAMELESS) = frameless_look_for_prologue(FI)
 198
 199 #define FRAME_CHAIN(FRAME)       sh_frame_chain(FRAME)
 200 #define FRAME_SAVED_PC(FRAME)    ((FRAME)->return_pc)
 201 #define FRAME_ARGS_ADDRESS(fi)   (fi)->frame
 202 #define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
 203
 204 /* Set VAL to the number of args passed to frame described by FI.
 205    Can set VAL to -1, meaning no way to tell.  */
 206
 207 /* We can't tell how many args there are */
 208
 209 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 210
 211 /* Return number of bytes at start of arglist that are not really args.  */
 212
 213 #define FRAME_ARGS_SKIP 0
 214
 215 /* Put here the code to store, into a struct frame_saved_regs,
 216    the addresses of the saved registers of frame described by FRAME_INFO.
 217    This includes special registers such as pc and fp saved in special
 218    ways in the stack frame.  sp is even more special:
 219    the address we return for it IS the sp for the next frame.  */
 220
 221 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 222    frame_find_saved_regs(frame_info, &(frame_saved_regs))
 223
 224 #define NAMES_HAVE_UNDERSCORE
 225
 226 typedef unsigned short INSN_WORD;
 227
 228 #define ADDR_BITS_REMOVE(addr) ((addr))
 229
 230 #define CALL_DUMMY_LENGTH 10
 231
 232 /* Discard from the stack the innermost frame,
 233    restoring all saved registers.  */
 234
 235 #define POP_FRAME pop_frame();
 236
 237
 238 #define NOP   {0x20, 0x0b}
 239
 240 #define REGISTER_SIZE 4
 241