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 <
  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 /* Nonzero if instruction at PC is a return instruction.  */
  78 #define ABOUT_TO_RETURN(pc) (read_memory_integer(pc,2) == 0x000b)
  79
  80 /* Say how long registers are.  */
  81 #define REGISTER_TYPE  long
  82
  83 /* Say how much memory is needed to store a copy of the register set */
  84 #define REGISTER_BYTES    (NUM_REGS*4)
  85
  86 /* Index within `registers' of the first byte of the space for
  87    register N.  */
  88
  89 #define REGISTER_BYTE(N)  ((N)*4)
  90
  91 /* Number of bytes of storage in the actual machine representation
  92    for register N.  */
  93
  94 #define REGISTER_RAW_SIZE(N) 4
  95
  96 #define REGISTER_VIRTUAL_SIZE(N) 4
  97
  98 /* Largest value REGISTER_RAW_SIZE can have.  */
  99
 100 #define MAX_REGISTER_RAW_SIZE 4
 101
 102 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
 103
 104 #define MAX_REGISTER_VIRTUAL_SIZE 4
 105
 106 /* Return the GDB type object for the "standard" data type
 107    of data in register N.  */
 108
 109 #define REGISTER_VIRTUAL_TYPE(N) \
 110         ((((N) >= FP0_REGNUM && (N) <= FP15_REGNUM)     \
 111           || (N) == FPUL_REGNUM)                        \
 112          ? builtin_type_float : builtin_type_int)
 113
 114 /* Initializer for an array of names of registers.
 115    Entries beyond the first NUM_REGS are ignored.  */
 116
 117 #define REGISTER_NAMES \
 118   { "r0",   "r1",   "r2",   "r3",   "r4",   "r5",   "r6",   "r7",   \
 119     "r8",   "r9",   "r10",  "r11",  "r12",  "r13",  "r14",  "r15",  \
 120     "pc",   "pr",   "gbr",  "vbr",  "mach", "macl", "sr",           \
 121     "fpul", "fpscr", \
 122     "fr0",  "fr1",  "fr2",  "fr3",  "fr4",  "fr5",  "fr6",  "fr7",  \
 123     "fr8",  "fr9",  "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", \
 124     "ssr",  "spc",   \
 125     "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", \
 126     "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1", \
 127   }
 128
 129 #define NUM_REGS 59
 130
 131 /* Register numbers of various important registers.  Note that some of
 132    these values are "real" register numbers, and correspond to the
 133    general registers of the machine, and some are "phony" register
 134    numbers which are too large to be actual register numbers as far as
 135    the user is concerned but do serve to get the desired values when
 136    passed to read_register.  */
 137
 138 #define R0_REGNUM       0
 139 #define STRUCT_RETURN_REGNUM 2
 140 #define ARG0_REGNUM     4
 141 #define ARGLAST_REGNUM  7
 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 FPUL_REGNUM     23
 152 #define FP0_REGNUM      25
 153 #define FP15_REGNUM     40
 154 #define SSR_REGNUM      41
 155 #define SPC_REGNUM      42
 156 #define R0B0_REGNUM     43
 157 #define R0B1_REGNUM     51
 158
 159 #define NUM_REALREGS    59
 160
 161 /* Store the address of the place in which to copy the structure the
 162    subroutine will return.  This is called from call_function.
 163
 164    We store structs through a pointer passed in R0 */
 165
 166 #define STORE_STRUCT_RETURN(ADDR, SP) \
 167     { write_register (STRUCT_RETURN_REGNUM, (ADDR));  }
 168
 169 #define USE_STRUCT_CONVENTION(gcc_p, type)      (TYPE_LENGTH(type) > 1)
 170
 171 /* Extract from an array REGBUF containing the (raw) register state
 172    a function return value of type TYPE, and copy that, in virtual format,
 173    into VALBUF.  */
 174
 175 extern void sh_extract_return_value PARAMS ((struct type *, void *, void *));
 176 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 177         sh_extract_return_value (TYPE, REGBUF, VALBUF)
 178
 179 /* Write into appropriate registers a function return value
 180    of type TYPE, given in virtual format.
 181
 182    Things always get returned in R0/R1 */
 183
 184 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 185   write_register_bytes (REGISTER_BYTE(0), VALBUF, TYPE_LENGTH (TYPE))
 186
 187 /* Extract from an array REGBUF containing the (raw) register state
 188    the address in which a function should return its structure value,
 189    as a CORE_ADDR (or an expression that can be used as one).  */
 190
 191 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
 192      extract_address (REGBUF, REGISTER_RAW_SIZE (0))
 193
 194
 195 /* Define other aspects of the stack frame.
 196    we keep a copy of the worked out return pc lying around, since it
 197    is a useful bit of info */
 198
 199 #define EXTRA_FRAME_INFO \
 200     CORE_ADDR return_pc; \
 201     int leaf_function;   \
 202     int f_offset;
 203
 204 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
 205     sh_init_extra_frame_info(fromleaf, fi)
 206
 207 /* A macro that tells us whether the function invocation represented
 208    by FI does not have a frame on the stack associated with it.  If it
 209    does not, FRAMELESS is set to 1, else 0.  */
 210
 211 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 212   (FRAMELESS) = frameless_look_for_prologue(FI)
 213
 214 #define FRAME_SAVED_PC(FRAME)           ((FRAME)->return_pc)
 215 #define FRAME_ARGS_ADDRESS(fi)          ((fi)->frame)
 216 #define FRAME_LOCALS_ADDRESS(fi)        ((fi)->frame)
 217
 218 /* Set VAL to the number of args passed to frame described by FI.
 219    Can set VAL to -1, meaning no way to tell.  */
 220
 221 /* We can't tell how many args there are */
 222
 223 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 224
 225 /* Return number of bytes at start of arglist that are not really args.  */
 226
 227 #define FRAME_ARGS_SKIP 0
 228
 229 extern void sh_frame_find_saved_regs PARAMS ((struct frame_info *fi,
 230                                               struct frame_saved_regs *fsr));
 231
 232 /* Put here the code to store, into a struct frame_saved_regs,
 233    the addresses of the saved registers of frame described by FRAME_INFO.
 234    This includes special registers such as pc and fp saved in special
 235    ways in the stack frame.  sp is even more special:
 236    the address we return for it IS the sp for the next frame.  */
 237
 238 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 239    sh_frame_find_saved_regs(frame_info, &(frame_saved_regs))
 240
 241 #define NAMES_HAVE_UNDERSCORE
 242
 243 typedef unsigned short INSN_WORD;
 244
 245 extern CORE_ADDR sh_push_arguments PARAMS ((int nargs,
 246                                             struct value **args,
 247                                             CORE_ADDR sp,
 248                                             unsigned char struct_return,
 249                                             CORE_ADDR struct_addr));
 250
 251 #define CALL_DUMMY                   {0}
 252 #define CALL_DUMMY_LENGTH            (0)
 253 #define CALL_DUMMY_START_OFFSET      (0)
 254 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
 255 #define FIX_CALL_DUMMY(DUMMY, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP)
 256 #define CALL_DUMMY_LOCATION          AT_ENTRY_POINT
 257 #define CALL_DUMMY_ADDRESS()         entry_point_address ()
 258 extern CORE_ADDR sh_push_return_address   PARAMS ((CORE_ADDR, CORE_ADDR));
 259 #define PUSH_RETURN_ADDRESS(PC, SP)  sh_push_return_address (PC, SP)
 260
 261
 262 #define FRAME_CHAIN(FRAME)           sh_frame_chain(FRAME)
 263 #define PUSH_DUMMY_FRAME             generic_push_dummy_frame ()
 264 #define FRAME_CHAIN_VALID(FP, FRAME) generic_frame_chain_valid (FP, FRAME)
 265 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP)
 266 #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
 267     (SP) = sh_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR)
 268
 269 /* override the standard get_saved_register function with
 270    one that takes account of generic CALL_DUMMY frames */
 271 #define GET_SAVED_REGISTER
 272
 273 /* Discard from the stack the innermost frame, restoring all saved
 274    registers.  */
 275
 276 #define POP_FRAME sh_pop_frame();
 277
 278 #define NOP   {0x20, 0x0b}
 279
 280 #define REGISTER_SIZE 4
 281
 282 #define COERCE_FLOAT_TO_DOUBLE 1