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 #ifdef __STDC__
  23 struct frame_info;
  24 struct frame_saved_regs;
  25 struct value;
  26 struct type;
  27 #endif
  28
  29 #define GDB_TARGET_IS_SH
  30
  31 #define IEEE_FLOAT 1
  32
  33 /* Define the bit, byte, and word ordering of the machine.  */
  34
  35 #define TARGET_BYTE_ORDER_SELECTABLE
  36
  37
  38 /* Offset from address of function to start of its code.
  39    Zero on most machines.  */
  40
  41 #define FUNCTION_START_OFFSET 0
  42
  43 /* Advance PC across any function entry prologue instructions
  44    to reach some "real" code.  */
  45
  46 extern CORE_ADDR sh_skip_prologue ();
  47 #define SKIP_PROLOGUE(ip) \
  48     {(ip) = sh_skip_prologue(ip);}
  49
  50
  51 /* Immediately after a function call, return the saved pc.
  52    Can't always go through the frames for this because on some machines
  53    the new frame is not set up until the new function executes
  54    some instructions.
  55
  56    The return address is the value saved in the PR register + 4  */
  57
  58 #define SAVED_PC_AFTER_CALL(frame) (ADDR_BITS_REMOVE(read_register(PR_REGNUM)))
  59
  60 /* Stack grows downward.  */
  61
  62 #define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
  63
  64 /* Illegal instruction - used by the simulator for breakpoint
  65    detection */
  66
  67 #define BREAKPOINT {0xc3, 0xc3}  /* 0xc3c3 is trapa #c3, and it works in big
  68                                     and little endian modes  */
  69
  70 #define BIG_REMOTE_BREAKPOINT    { 0xc3, 0x20 }
  71 #define LITTLE_REMOTE_BREAKPOINT { 0x20, 0xc3 }
  72
  73 /* If your kernel resets the pc after the trap happens you may need to
  74    define this before including this file.  */
  75 #define DECR_PC_AFTER_BREAK 0
  76
  77 /* Say how long registers are.  */
  78 #define REGISTER_TYPE  long
  79
  80 /* Say how much memory is needed to store a copy of the register set */
  81 #define REGISTER_BYTES    (NUM_REGS*4)
  82
  83 /* Index within `registers' of the first byte of the space for
  84    register N.  */
  85
  86 #define REGISTER_BYTE(N)  ((N)*4)
  87
  88 /* Number of bytes of storage in the actual machine representation
  89    for register N.  */
  90
  91 #define REGISTER_RAW_SIZE(N) 4
  92
  93 #define REGISTER_VIRTUAL_SIZE(N) 4
  94
  95 /* Largest value REGISTER_RAW_SIZE can have.  */
  96
  97 #define MAX_REGISTER_RAW_SIZE 4
  98
  99 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
 100
 101 #define MAX_REGISTER_VIRTUAL_SIZE 4
 102
 103 /* Return the GDB type object for the "standard" data type
 104    of data in register N.  */
 105
 106 #define REGISTER_VIRTUAL_TYPE(N) \
 107         ((((N) >= FP0_REGNUM && (N) <= FP15_REGNUM)     \
 108           || (N) == FPUL_REGNUM)                        \
 109          ? builtin_type_float : builtin_type_int)
 110
 111 /* Initializer for an array of names of registers.
 112    Entries beyond the first NUM_REGS are ignored.  */
 113
 114 extern char **sh_register_names;
 115 #define REGISTER_NAME(i) sh_register_names[i]
 116
 117 #define NUM_REGS 59
 118
 119 /* Register numbers of various important registers.  Note that some of
 120    these values are "real" register numbers, and correspond to the
 121    general registers of the machine, and some are "phony" register
 122    numbers which are too large to be actual register numbers as far as
 123    the user is concerned but do serve to get the desired values when
 124    passed to read_register.  */
 125
 126 #define R0_REGNUM       0
 127 #define STRUCT_RETURN_REGNUM 2
 128 #define ARG0_REGNUM     4
 129 #define ARGLAST_REGNUM  7
 130 #define FP_REGNUM       14
 131 #define SP_REGNUM       15
 132 #define PC_REGNUM       16
 133 #define PR_REGNUM       17
 134 #define GBR_REGNUM      18
 135 #define VBR_REGNUM      19
 136 #define MACH_REGNUM     20
 137 #define MACL_REGNUM     21
 138 #define SR_REGNUM       22
 139 #define FPUL_REGNUM     23
 140 #define FPSCR_REGNUM    24
 141 #define FP0_REGNUM      25
 142 #define FP15_REGNUM     40
 143 #define SSR_REGNUM      41
 144 #define SPC_REGNUM      42
 145 #define R0B0_REGNUM     43
 146 #define R0B1_REGNUM     51
 147
 148 #define NUM_REALREGS    59
 149
 150 /* Store the address of the place in which to copy the structure the
 151    subroutine will return.  This is called from call_function.
 152
 153    We store structs through a pointer passed in R0 */
 154
 155 #define STORE_STRUCT_RETURN(ADDR, SP) \
 156     { write_register (STRUCT_RETURN_REGNUM, (ADDR));  }
 157
 158 extern use_struct_convention_fn sh_use_struct_convention;
 159 #define USE_STRUCT_CONVENTION(gcc_p, type) sh_use_struct_convention (gcc_p, type)
 160
 161 /* Extract from an array REGBUF containing the (raw) register state
 162    a function return value of type TYPE, and copy that, in virtual format,
 163    into VALBUF.  */
 164
 165 extern void sh_extract_return_value PARAMS ((struct type *, void *, void *));
 166 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 167         sh_extract_return_value (TYPE, REGBUF, VALBUF)
 168
 169 /* Write into appropriate registers a function return value
 170    of type TYPE, given in virtual format.
 171
 172    Things always get returned in R0/R1 */
 173
 174 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 175   write_register_bytes (REGISTER_BYTE(0), VALBUF, TYPE_LENGTH (TYPE))
 176
 177 /* Extract from an array REGBUF containing the (raw) register state
 178    the address in which a function should return its structure value,
 179    as a CORE_ADDR (or an expression that can be used as one).  */
 180
 181 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
 182      extract_address (REGBUF, REGISTER_RAW_SIZE (0))
 183
 184
 185 /* Define other aspects of the stack frame.
 186    we keep a copy of the worked out return pc lying around, since it
 187    is a useful bit of info */
 188
 189 #define EXTRA_FRAME_INFO \
 190     CORE_ADDR return_pc; \
 191     int leaf_function;   \
 192     int f_offset;
 193
 194 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
 195     sh_init_extra_frame_info(fromleaf, fi)
 196 extern void sh_init_extra_frame_info PARAMS ((int, struct frame_info *));
 197
 198 /* A macro that tells us whether the function invocation represented
 199    by FI does not have a frame on the stack associated with it.  If it
 200    does not, FRAMELESS is set to 1, else 0.  */
 201
 202 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 203   (FRAMELESS) = frameless_look_for_prologue(FI)
 204
 205 #define FRAME_SAVED_PC(FRAME)           ((FRAME)->return_pc)
 206 #define FRAME_ARGS_ADDRESS(fi)          ((fi)->frame)
 207 #define FRAME_LOCALS_ADDRESS(fi)        ((fi)->frame)
 208
 209 /* Set VAL to the number of args passed to frame described by FI.
 210    Can set VAL to -1, meaning no way to tell.  */
 211
 212 /* We can't tell how many args there are */
 213
 214 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 215
 216 /* Return number of bytes at start of arglist that are not really args.  */
 217
 218 #define FRAME_ARGS_SKIP 0
 219
 220 extern void sh_frame_find_saved_regs PARAMS ((struct frame_info *fi,
 221                                               struct frame_saved_regs *fsr));
 222
 223 /* Put here the code to store, into a struct frame_saved_regs,
 224    the addresses of the saved registers of frame described by FRAME_INFO.
 225    This includes special registers such as pc and fp saved in special
 226    ways in the stack frame.  sp is even more special:
 227    the address we return for it IS the sp for the next frame.  */
 228
 229 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 230    sh_frame_find_saved_regs(frame_info, &(frame_saved_regs))
 231
 232 #define NAMES_HAVE_UNDERSCORE
 233
 234 typedef unsigned short INSN_WORD;
 235
 236 extern CORE_ADDR sh_push_arguments PARAMS ((int nargs,
 237                                             struct value **args,
 238                                             CORE_ADDR sp,
 239                                             unsigned char struct_return,
 240                                             CORE_ADDR struct_addr));
 241
 242 #define USE_GENERIC_DUMMY_FRAMES
 243 #define CALL_DUMMY                   {0}
 244 #define CALL_DUMMY_LENGTH            (0)
 245 #define CALL_DUMMY_START_OFFSET      (0)
 246 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
 247 #define FIX_CALL_DUMMY(DUMMY, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP)
 248 #define CALL_DUMMY_LOCATION          AT_ENTRY_POINT
 249 #define CALL_DUMMY_ADDRESS()         entry_point_address ()
 250 extern CORE_ADDR sh_push_return_address   PARAMS ((CORE_ADDR, CORE_ADDR));
 251 #define PUSH_RETURN_ADDRESS(PC, SP)  sh_push_return_address (PC, SP)
 252
 253
 254 extern CORE_ADDR sh_frame_chain PARAMS ((struct frame_info *));
 255 #define FRAME_CHAIN(FRAME)           sh_frame_chain(FRAME)
 256 #define PUSH_DUMMY_FRAME             generic_push_dummy_frame ()
 257 #define FRAME_CHAIN_VALID(FP, FRAME) generic_frame_chain_valid (FP, FRAME)
 258 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP)
 259 #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
 260     (SP) = sh_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR)
 261
 262 /* override the standard get_saved_register function with
 263    one that takes account of generic CALL_DUMMY frames */
 264 #define GET_SAVED_REGISTER
 265
 266 /* Discard from the stack the innermost frame, restoring all saved
 267    registers.  */
 268
 269 extern void sh_pop_frame PARAMS ((void));
 270 #define POP_FRAME sh_pop_frame();
 271
 272 #define NOP   {0x20, 0x0b}
 273
 274 #define REGISTER_SIZE 4
 275
 276 #define COERCE_FLOAT_TO_DOUBLE 1
 277
 278 #define BELIEVE_PCC_PROMOTION 1
 279
 280 /* Need this for WinGDB.  See gdb/mswin/{regdoc.h, gdbwin.c, gui.cpp}.  */
 281 #define TARGET_SH