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,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 /* Contributed by Steve Chamberlain sac@cygnus.com */
  22
  23 struct frame_info;
  24 struct frame_saved_regs;
  25 struct value;
  26 struct type;
  27
  28 #define GDB_TARGET_IS_SH
  29
  30 #define IEEE_FLOAT (1)
  31
  32 /* Define the bit, byte, and word ordering of the machine.  */
  33
  34 #define TARGET_BYTE_ORDER_SELECTABLE
  35
  36
  37 /* Offset from address of function to start of its code.
  38    Zero on most machines.  */
  39
  40 #define FUNCTION_START_OFFSET 0
  41
  42 /* Advance PC across any function entry prologue instructions
  43    to reach some "real" code.  */
  44
  45 extern CORE_ADDR sh_skip_prologue PARAMS ((CORE_ADDR));
  46 #define SKIP_PROLOGUE(ip) (sh_skip_prologue (ip))
  47
  48 /* Immediately after a function call, return the saved pc.
  49    Can't always go through the frames for this because on some machines
  50    the new frame is not set up until the new function executes
  51    some instructions.
  52
  53    The return address is the value saved in the PR register + 4  */
  54
  55 #define SAVED_PC_AFTER_CALL(frame) (ADDR_BITS_REMOVE(read_register(PR_REGNUM)))
  56
  57 /* Stack grows downward.  */
  58
  59 #define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
  60
  61 /* Illegal instruction - used by the simulator for breakpoint
  62    detection */
  63
  64 #define BREAKPOINT {0xc3, 0xc3} /* 0xc3c3 is trapa #c3, and it works in big
  65                                    and little endian modes  */
  66
  67 #define BIG_REMOTE_BREAKPOINT    { 0xc3, 0x20 }
  68 #define LITTLE_REMOTE_BREAKPOINT { 0x20, 0xc3 }
  69
  70 /* If your kernel resets the pc after the trap happens you may need to
  71    define this before including this file.  */
  72 #define DECR_PC_AFTER_BREAK 0
  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           && TARGET_ARCHITECTURE->mach != bfd_mach_sh_dsp       \
 107           && TARGET_ARCHITECTURE->mach != bfd_mach_sh3_dsp)     \
 108          ? builtin_type_float : builtin_type_int)
 109
 110 /* Initializer for an array of names of registers.
 111    Entries beyond the first NUM_REGS are ignored.  */
 112
 113 extern char **sh_register_names;
 114 #define REGISTER_NAME(i) sh_register_names[i]
 115
 116 #define NUM_REGS 59
 117
 118 /* Register numbers of various important registers.  Note that some of
 119    these values are "real" register numbers, and correspond to the
 120    general registers of the machine, and some are "phony" register
 121    numbers which are too large to be actual register numbers as far as
 122    the user is concerned but do serve to get the desired values when
 123    passed to read_register.  */
 124
 125 #define R0_REGNUM       0
 126 #define STRUCT_RETURN_REGNUM 2
 127 #define ARG0_REGNUM     4
 128 #define ARGLAST_REGNUM  7
 129 #define FP_REGNUM       14
 130 #define SP_REGNUM       15
 131 #define PC_REGNUM       16
 132 #define PR_REGNUM       17
 133 #define GBR_REGNUM      18
 134 #define VBR_REGNUM      19
 135 #define MACH_REGNUM     20
 136 #define MACL_REGNUM     21
 137 #define SR_REGNUM       22
 138 #define FPUL_REGNUM     23
 139 #define FPSCR_REGNUM    24
 140 #define DSR_REGNUM      24
 141 #define FP0_REGNUM      25
 142 #define FP15_REGNUM     40
 143 #define A0G_REGNUM      25
 144 #define A0_REGNUM       26
 145 #define A1G_REGNUM      27
 146 #define A1_REGNUM       28
 147 #define M0_REGNUM       29
 148 #define M1_REGNUM       30
 149 #define X0_REGNUM       31
 150 #define X1_REGNUM       32
 151 #define Y0_REGNUM       33
 152 #define Y1_REGNUM       34
 153 #define MOD_REGNUM      40
 154 #define SSR_REGNUM      41
 155 #define SPC_REGNUM      42
 156 #define R0B0_REGNUM     43
 157 #define R0B1_REGNUM     51
 158 #define RS_REGNUM       43
 159 #define RE_REGNUM       44
 160 #define R0B_REGNUM      51
 161
 162 #define NUM_REALREGS    59
 163
 164 /* Store the address of the place in which to copy the structure the
 165    subroutine will return.  This is called from call_function.
 166
 167    We store structs through a pointer passed in R0 */
 168
 169 #define STORE_STRUCT_RETURN(ADDR, SP) \
 170     { write_register (STRUCT_RETURN_REGNUM, (ADDR));  }
 171
 172 extern use_struct_convention_fn sh_use_struct_convention;
 173 #define USE_STRUCT_CONVENTION(gcc_p, type) sh_use_struct_convention (gcc_p, type)
 174
 175 /* Extract from an array REGBUF containing the (raw) register state
 176    a function return value of type TYPE, and copy that, in virtual format,
 177    into VALBUF.  */
 178
 179 extern void sh_extract_return_value PARAMS ((struct type *, void *, void *));
 180 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 181         sh_extract_return_value (TYPE, REGBUF, VALBUF)
 182
 183 /* Write into appropriate registers a function return value
 184    of type TYPE, given in virtual format.
 185
 186    Things always get returned in R0/R1 */
 187
 188 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 189   write_register_bytes (REGISTER_BYTE(0), VALBUF, TYPE_LENGTH (TYPE))
 190
 191 /* Extract from an array REGBUF containing the (raw) register state
 192    the address in which a function should return its structure value,
 193    as a CORE_ADDR (or an expression that can be used as one).  */
 194
 195 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
 196      extract_address (REGBUF, REGISTER_RAW_SIZE (0))
 197
 198
 199 /* Define other aspects of the stack frame.
 200    we keep a copy of the worked out return pc lying around, since it
 201    is a useful bit of info */
 202
 203 #define EXTRA_FRAME_INFO \
 204     CORE_ADDR return_pc; \
 205     int leaf_function;   \
 206     int f_offset;
 207
 208 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
 209     sh_init_extra_frame_info(fromleaf, fi)
 210 extern void sh_init_extra_frame_info PARAMS ((int, struct frame_info *));
 211
 212 /* A macro that tells us whether the function invocation represented
 213    by FI does not have a frame on the stack associated with it.  If it
 214    does not, FRAMELESS is set to 1, else 0.  */
 215
 216 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
 217   (frameless_look_for_prologue(FI))
 218
 219 #define FRAME_SAVED_PC(FRAME)           ((FRAME)->return_pc)
 220 #define FRAME_ARGS_ADDRESS(fi)          ((fi)->frame)
 221 #define FRAME_LOCALS_ADDRESS(fi)        ((fi)->frame)
 222
 223 /* Set VAL to the number of args passed to frame described by FI.
 224    Can set VAL to -1, meaning no way to tell.  */
 225
 226 /* We can't tell how many args there are */
 227
 228 #define FRAME_NUM_ARGS(fi) (-1)
 229
 230 /* Return number of bytes at start of arglist that are not really args.  */
 231
 232 #define FRAME_ARGS_SKIP 0
 233
 234 extern void sh_frame_find_saved_regs PARAMS ((struct frame_info * fi,
 235                                             struct frame_saved_regs * fsr));
 236
 237 /* Put here the code to store, into a struct frame_saved_regs,
 238    the addresses of the saved registers of frame described by FRAME_INFO.
 239    This includes special registers such as pc and fp saved in special
 240    ways in the stack frame.  sp is even more special:
 241    the address we return for it IS the sp for the next frame.  */
 242
 243 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 244    sh_frame_find_saved_regs(frame_info, &(frame_saved_regs))
 245
 246 typedef unsigned short INSN_WORD;
 247
 248 extern CORE_ADDR sh_push_arguments PARAMS ((int nargs,
 249                                             struct value ** args,
 250                                             CORE_ADDR sp,
 251                                             unsigned char struct_return,
 252                                             CORE_ADDR struct_addr));
 253
 254 #define USE_GENERIC_DUMMY_FRAMES 1
 255 #define CALL_DUMMY                   {0}
 256 #define CALL_DUMMY_LENGTH            (0)
 257 #define CALL_DUMMY_START_OFFSET      (0)
 258 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
 259 #define FIX_CALL_DUMMY(DUMMY, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP)
 260 #define CALL_DUMMY_LOCATION          AT_ENTRY_POINT
 261 #define CALL_DUMMY_ADDRESS()         entry_point_address ()
 262 extern CORE_ADDR sh_push_return_address PARAMS ((CORE_ADDR, CORE_ADDR));
 263 #define PUSH_RETURN_ADDRESS(PC, SP)  sh_push_return_address (PC, SP)
 264
 265
 266 extern CORE_ADDR sh_frame_chain PARAMS ((struct frame_info *));
 267 #define FRAME_CHAIN(FRAME)           sh_frame_chain(FRAME)
 268 #define PUSH_DUMMY_FRAME             generic_push_dummy_frame ()
 269 #define FRAME_CHAIN_VALID(FP, FRAME) generic_file_frame_chain_valid (FP, FRAME)
 270 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
 271 #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
 272     (sh_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))
 273
 274 /* override the standard get_saved_register function with
 275    one that takes account of generic CALL_DUMMY frames */
 276 #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
 277      generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
 278
 279 /* Discard from the stack the innermost frame, restoring all saved
 280    registers.  */
 281
 282 extern void sh_pop_frame PARAMS ((void));
 283 #define POP_FRAME sh_pop_frame();
 284
 285 #define NOP   {0x20, 0x0b}
 286
 287 #define REGISTER_SIZE 4
 288
 289 #define COERCE_FLOAT_TO_DOUBLE(formal, actual) (1)
 290
 291 #define BELIEVE_PCC_PROMOTION 1
 292
 293 /* Need this for WinGDB.  See gdb/mswin/{regdoc.h, gdbwin.c, gui.cpp}.  */
 294 #define TARGET_SH