| 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 |