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          ? 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 extern char **sh_register_names;
 112 #define REGISTER_NAME(i) sh_register_names[i]
 113
 114 #define NUM_REGS 59
 115
 116 /* Register numbers of various important registers.  Note that some of
 117    these values are "real" register numbers, and correspond to the
 118    general registers of the machine, and some are "phony" register
 119    numbers which are too large to be actual register numbers as far as
 120    the user is concerned but do serve to get the desired values when
 121    passed to read_register.  */
 122
 123 #define R0_REGNUM       0
 124 #define STRUCT_RETURN_REGNUM 2
 125 #define ARG0_REGNUM     4
 126 #define ARGLAST_REGNUM  7
 127 #define FP_REGNUM       14
 128 #define SP_REGNUM       15
 129 #define PC_REGNUM       16
 130 #define PR_REGNUM       17
 131 #define GBR_REGNUM      18
 132 #define VBR_REGNUM      19
 133 #define MACH_REGNUM     20
 134 #define MACL_REGNUM     21
 135 #define SR_REGNUM       22
 136 #define FPUL_REGNUM     23
 137 #define FPSCR_REGNUM    24
 138 #define FP0_REGNUM      25
 139 #define FP15_REGNUM     40
 140 #define SSR_REGNUM      41
 141 #define SPC_REGNUM      42
 142 #define R0B0_REGNUM     43
 143 #define R0B1_REGNUM     51
 144
 145 #define NUM_REALREGS    59
 146
 147 /* Store the address of the place in which to copy the structure the
 148    subroutine will return.  This is called from call_function.
 149
 150    We store structs through a pointer passed in R0 */
 151
 152 #define STORE_STRUCT_RETURN(ADDR, SP) \
 153     { write_register (STRUCT_RETURN_REGNUM, (ADDR));  }
 154
 155 extern use_struct_convention_fn sh_use_struct_convention;
 156 #define USE_STRUCT_CONVENTION(gcc_p, type) sh_use_struct_convention (gcc_p, type)
 157
 158 /* Extract from an array REGBUF containing the (raw) register state
 159    a function return value of type TYPE, and copy that, in virtual format,
 160    into VALBUF.  */
 161
 162 extern void sh_extract_return_value PARAMS ((struct type *, void *, void *));
 163 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 164         sh_extract_return_value (TYPE, REGBUF, VALBUF)
 165
 166 /* Write into appropriate registers a function return value
 167    of type TYPE, given in virtual format.
 168
 169    Things always get returned in R0/R1 */
 170
 171 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 172   write_register_bytes (REGISTER_BYTE(0), VALBUF, TYPE_LENGTH (TYPE))
 173
 174 /* Extract from an array REGBUF containing the (raw) register state
 175    the address in which a function should return its structure value,
 176    as a CORE_ADDR (or an expression that can be used as one).  */
 177
 178 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
 179      extract_address (REGBUF, REGISTER_RAW_SIZE (0))
 180
 181
 182 /* Define other aspects of the stack frame.
 183    we keep a copy of the worked out return pc lying around, since it
 184    is a useful bit of info */
 185
 186 #define EXTRA_FRAME_INFO \
 187     CORE_ADDR return_pc; \
 188     int leaf_function;   \
 189     int f_offset;
 190
 191 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
 192     sh_init_extra_frame_info(fromleaf, fi)
 193 extern void sh_init_extra_frame_info PARAMS ((int, struct frame_info *));
 194
 195 /* A macro that tells us whether the function invocation represented
 196    by FI does not have a frame on the stack associated with it.  If it
 197    does not, FRAMELESS is set to 1, else 0.  */
 198
 199 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
 200   (frameless_look_for_prologue(FI))
 201
 202 #define FRAME_SAVED_PC(FRAME)           ((FRAME)->return_pc)
 203 #define FRAME_ARGS_ADDRESS(fi)          ((fi)->frame)
 204 #define FRAME_LOCALS_ADDRESS(fi)        ((fi)->frame)
 205
 206 /* Set VAL to the number of args passed to frame described by FI.
 207    Can set VAL to -1, meaning no way to tell.  */
 208
 209 /* We can't tell how many args there are */
 210
 211 #define FRAME_NUM_ARGS(fi) (-1)
 212
 213 /* Return number of bytes at start of arglist that are not really args.  */
 214
 215 #define FRAME_ARGS_SKIP 0
 216
 217 extern void sh_frame_find_saved_regs PARAMS ((struct frame_info * fi,
 218                                             struct frame_saved_regs * fsr));
 219
 220 /* Put here the code to store, into a struct frame_saved_regs,
 221    the addresses of the saved registers of frame described by FRAME_INFO.
 222    This includes special registers such as pc and fp saved in special
 223    ways in the stack frame.  sp is even more special:
 224    the address we return for it IS the sp for the next frame.  */
 225
 226 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 227    sh_frame_find_saved_regs(frame_info, &(frame_saved_regs))
 228
 229 typedef unsigned short INSN_WORD;
 230
 231 extern CORE_ADDR sh_push_arguments PARAMS ((int nargs,
 232                                             struct value ** args,
 233                                             CORE_ADDR sp,
 234                                             unsigned char struct_return,
 235                                             CORE_ADDR struct_addr));
 236
 237 #define USE_GENERIC_DUMMY_FRAMES 1
 238 #define CALL_DUMMY                   {0}
 239 #define CALL_DUMMY_LENGTH            (0)
 240 #define CALL_DUMMY_START_OFFSET      (0)
 241 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
 242 #define FIX_CALL_DUMMY(DUMMY, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP)
 243 #define CALL_DUMMY_LOCATION          AT_ENTRY_POINT
 244 #define CALL_DUMMY_ADDRESS()         entry_point_address ()
 245 extern CORE_ADDR sh_push_return_address PARAMS ((CORE_ADDR, CORE_ADDR));
 246 #define PUSH_RETURN_ADDRESS(PC, SP)  sh_push_return_address (PC, SP)
 247
 248
 249 extern CORE_ADDR sh_frame_chain PARAMS ((struct frame_info *));
 250 #define FRAME_CHAIN(FRAME)           sh_frame_chain(FRAME)
 251 #define PUSH_DUMMY_FRAME             generic_push_dummy_frame ()
 252 #define FRAME_CHAIN_VALID(FP, FRAME) generic_frame_chain_valid (FP, FRAME)
 253 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
 254 #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
 255     (sh_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))
 256
 257 /* override the standard get_saved_register function with
 258    one that takes account of generic CALL_DUMMY frames */
 259 #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
 260      generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
 261
 262 /* Discard from the stack the innermost frame, restoring all saved
 263    registers.  */
 264
 265 extern void sh_pop_frame PARAMS ((void));
 266 #define POP_FRAME sh_pop_frame();
 267
 268 #define NOP   {0x20, 0x0b}
 269
 270 #define REGISTER_SIZE 4
 271
 272 #define COERCE_FLOAT_TO_DOUBLE 1
 273
 274 #define BELIEVE_PCC_PROMOTION 1
 275
 276 /* Need this for WinGDB.  See gdb/mswin/{regdoc.h, gdbwin.c, gui.cpp}.  */
 277 #define TARGET_SH