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5076de82 FF |
1 | /* Parameters for execution on a H8/500 series machine. |
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., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | /* Contributed by Steve Chamberlain sac@cygnus.com */ | |
21 | ||
01aa2b19 | 22 | #define GDB_TARGET_IS_H8500 |
5076de82 FF |
23 | |
24 | #define IEEE_FLOAT 1 | |
25 | ||
26 | /* Define the bit, byte, and word ordering of the machine. */ | |
27 | ||
28 | #define TARGET_BYTE_ORDER BIG_ENDIAN | |
29 | ||
5076de82 | 30 | #define TARGET_INT_BIT 16 |
3b5b5075 | 31 | #define TARGET_LONG_BIT 32 |
5076de82 FF |
32 | #define TARGET_PTR_BIT (minimum_mode ? 16 : 32) |
33 | ||
34 | ||
35 | /* Offset from address of function to start of its code. | |
36 | Zero on most machines. */ | |
37 | ||
38 | #define FUNCTION_START_OFFSET 0 | |
39 | ||
40 | /* Advance PC across any function entry prologue instructions | |
41 | to reach some "real" code. */ | |
42 | ||
43 | #define SKIP_PROLOGUE(ip) {(ip) = h8500_skip_prologue(ip);} | |
44 | extern CORE_ADDR h8500_skip_prologue (); | |
45 | ||
46 | ||
47 | /* Immediately after a function call, return the saved pc. | |
48 | Can't always go through the frames for this because on some machines | |
49 | the new frame is not set up until the new function executes | |
50 | some instructions. */ | |
51 | ||
52 | #define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call(frame) | |
53 | ||
54 | ||
55 | /* Stack grows downward. */ | |
56 | ||
57 | #define INNER_THAN < | |
58 | ||
59 | /* Illegal instruction - used by the simulator for breakpoint | |
60 | detection */ | |
61 | #define BREAKPOINT {0x0b} | |
62 | ||
63 | ||
64 | /* If your kernel resets the pc after the trap happens you may need to | |
65 | define this before including this file. */ | |
66 | ||
67 | #define DECR_PC_AFTER_BREAK 0 | |
68 | ||
69 | ||
70 | /* Nonzero if instruction at PC is a return instruction. */ | |
71 | ||
72 | #define ABOUT_TO_RETURN(pc) about_to_return(pc) | |
73 | ||
74 | /* Return 1 if P points to an invalid floating point value. */ | |
75 | ||
76 | #define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */ | |
77 | ||
78 | /* Say how long registers are. */ | |
79 | ||
80 | #define REGISTER_TYPE unsigned long | |
81 | ||
82 | /* Say how much memory is needed to store a copy of the register set */ | |
83 | ||
3b5b5075 | 84 | #define REGISTER_BYTES (NUM_REGS * 4) |
5076de82 FF |
85 | |
86 | /* Index within `registers' of the first byte of the space for | |
87 | register N. */ | |
88 | ||
3b5b5075 | 89 | #define REGISTER_BYTE(N) ((N)*4) |
5076de82 FF |
90 | |
91 | /* Number of bytes of storage in the actual machine representation | |
92 | for register N. */ | |
93 | ||
01aa2b19 SG |
94 | #define REGISTER_RAW_SIZE(N) h8500_register_size(N) |
95 | int h8500_register_size PARAMS ((int regno)); | |
5076de82 | 96 | |
01aa2b19 | 97 | #define REGISTER_VIRTUAL_SIZE(N) h8500_register_size(N) |
5076de82 FF |
98 | |
99 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
100 | ||
101 | #define MAX_REGISTER_RAW_SIZE 4 | |
102 | ||
103 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
104 | ||
105 | #define MAX_REGISTER_VIRTUAL_SIZE 4 | |
106 | ||
5076de82 FF |
107 | /* Return the GDB type object for the "standard" data type |
108 | of data in register N. */ | |
5076de82 | 109 | |
01aa2b19 SG |
110 | #define REGISTER_VIRTUAL_TYPE(N) h8500_register_virtual_type(N) |
111 | struct type *h8500_register_virtual_type PARAMS ((int regno)); | |
5076de82 FF |
112 | |
113 | /* Initializer for an array of names of registers. | |
114 | Entries beyond the first NUM_REGS are ignored. */ | |
115 | ||
116 | #define REGISTER_NAMES \ | |
3b5b5075 SC |
117 | {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ |
118 | "pr0", "pr1", "pr2","pr3","pr4","pr5","pr6","pr7","cp","dp","ep","tp","ccr","pc"} | |
119 | ||
5076de82 FF |
120 | |
121 | /* Register numbers of various important registers. | |
122 | Note that some of these values are "real" register numbers, | |
123 | and correspond to the general registers of the machine, | |
124 | and some are "phony" register numbers which are too large | |
125 | to be actual register numbers as far as the user is concerned | |
126 | but do serve to get the desired values when passed to read_register. */ | |
127 | ||
128 | ||
01aa2b19 SG |
129 | #define R0_REGNUM 0 |
130 | #define R1_REGNUM 1 | |
131 | #define R2_REGNUM 2 | |
132 | #define R3_REGNUM 3 | |
133 | #define R4_REGNUM 4 | |
134 | #define R5_REGNUM 5 | |
135 | #define R6_REGNUM 6 | |
136 | #define R7_REGNUM 7 | |
5076de82 | 137 | |
5076de82 | 138 | |
3b5b5075 SC |
139 | #define PR0_REGNUM 8 |
140 | #define PR1_REGNUM 9 | |
141 | #define PR2_REGNUM 10 | |
142 | #define PR3_REGNUM 11 | |
143 | #define PR4_REGNUM 12 | |
144 | #define PR5_REGNUM 13 | |
145 | #define PR6_REGNUM 14 | |
146 | #define PR7_REGNUM 15 | |
147 | ||
148 | #define SEG_C_REGNUM 16 /* Segment registers */ | |
149 | #define SEG_D_REGNUM 17 | |
150 | #define SEG_E_REGNUM 18 | |
151 | #define SEG_T_REGNUM 19 | |
152 | ||
153 | ||
154 | #define CCR_REGNUM 20 /* Contains processor status */ | |
155 | #define PC_REGNUM 21 /* Contains program counter */ | |
156 | ||
157 | ||
158 | #define NUM_REGS 22 | |
5076de82 | 159 | |
5076de82 | 160 | |
3b5b5075 SC |
161 | #define SP_REGNUM PR7_REGNUM /* Contains address of top of stack */ |
162 | #define FP_REGNUM PR6_REGNUM /* Contains address of executing stack frame */ | |
5076de82 FF |
163 | |
164 | #define PTR_SIZE (minimum_mode ? 2: 4) | |
165 | #define PTR_MASK (minimum_mode ? 0x0000ffff : 0x00ffffff) | |
166 | ||
167 | /* Store the address of the place in which to copy the structure the | |
168 | subroutine will return. This is called from call_function. */ | |
169 | ||
170 | /*#define STORE_STRUCT_RETURN(ADDR, SP) \ | |
171 | { write_register (0, (ADDR)); abort(); }*/ | |
172 | ||
173 | /* Extract from an array REGBUF containing the (raw) register state | |
174 | a function return value of type TYPE, and copy that, in virtual format, | |
175 | into VALBUF. */ | |
176 | ||
177 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
ade40d31 | 178 | memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE)) |
5076de82 FF |
179 | |
180 | ||
181 | /* Write into appropriate registers a function return value | |
182 | of type TYPE, given in virtual format. Assumes floats are passed | |
183 | in d0/d1. */ | |
184 | ||
185 | ||
186 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
187 | write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)) | |
188 | ||
189 | ||
190 | /* Extract from an array REGBUF containing the (raw) register state | |
191 | the address in which a function should return its structure value, | |
192 | as a CORE_ADDR (or an expression that can be used as one). */ | |
193 | ||
194 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF)) | |
195 | \f | |
196 | ||
197 | /* Define other aspects of the stack frame. */ | |
198 | ||
199 | /* A macro that tells us whether the function invocation represented | |
200 | by FI does not have a frame on the stack associated with it. If it | |
201 | does not, FRAMELESS is set to 1, else 0. */ | |
202 | #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \ | |
203 | (FRAMELESS) = frameless_look_for_prologue(FI) | |
204 | ||
205 | /* Any function with a frame looks like this | |
206 | SECOND ARG | |
207 | FIRST ARG | |
208 | RET PC | |
209 | SAVED R2 | |
210 | SAVED R3 | |
211 | SAVED FP <-FP POINTS HERE | |
212 | LOCALS0 | |
213 | LOCALS1 <-SP POINTS HERE | |
214 | ||
215 | */ | |
01aa2b19 | 216 | |
9acdb2dc | 217 | CORE_ADDR h8500_frame_chain (/* FRAME thisframe */); |
01aa2b19 | 218 | |
3b5b5075 SC |
219 | #define INIT_EXTRA_FRAME_INFO(fromleaf, fci) ; |
220 | /* (fci)->frame |= read_register(SEG_T_REGNUM) << 16;*/ | |
01aa2b19 SG |
221 | |
222 | #define FRAME_CHAIN(FRAME) h8500_frame_chain(FRAME) | |
223 | ||
5076de82 FF |
224 | #define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME) |
225 | ||
226 | #define FRAME_ARGS_ADDRESS(fi) frame_args_address(fi) | |
227 | ||
228 | #define FRAME_LOCALS_ADDRESS(fi) frame_locals_address(fi); | |
229 | ||
230 | /* Set VAL to the number of args passed to frame described by FI. | |
231 | Can set VAL to -1, meaning no way to tell. */ | |
232 | ||
233 | /* We can't tell how many args there are | |
234 | now that the C compiler delays popping them. */ | |
235 | ||
236 | #define FRAME_NUM_ARGS(val,fi) (val = -1) | |
237 | ||
238 | /* Return number of bytes at start of arglist that are not really args. */ | |
239 | ||
240 | #define FRAME_ARGS_SKIP 0 | |
241 | ||
242 | /* Put here the code to store, into a struct frame_saved_regs, | |
243 | the addresses of the saved registers of frame described by FRAME_INFO. | |
244 | This includes special registers such as pc and fp saved in special | |
245 | ways in the stack frame. sp is even more special: | |
246 | the address we return for it IS the sp for the next frame. */ | |
247 | ||
248 | #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ | |
249 | frame_find_saved_regs(frame_info, &(frame_saved_regs)) | |
250 | \f | |
251 | ||
252 | /* Push an empty stack frame, to record the current PC, etc. */ | |
253 | ||
254 | /*#define PUSH_DUMMY_FRAME { h8300_push_dummy_frame (); }*/ | |
255 | ||
256 | /* Discard from the stack the innermost frame, restoring all registers. */ | |
257 | ||
258 | #define POP_FRAME { h8300_pop_frame (); } | |
259 | ||
260 | #define SHORT_INT_MAX 32767 | |
261 | #define SHORT_INT_MIN -32768 | |
262 | ||
263 | ||
264 | ||
265 | #define BEFORE_MAIN_LOOP_HOOK \ | |
266 | hms_before_main_loop(); | |
267 | ||
268 | ||
269 | #define NAMES_HAVE_UNDERSCORE | |
270 | ||
271 | typedef unsigned short INSN_WORD; | |
272 | ||
273 | #define ADDR_BITS_REMOVE(addr) ((addr) & 0xffffff) | |
5076de82 FF |
274 | |
275 | #define read_memory_short(x) (read_memory_integer(x,2) & 0xffff) | |
276 | #define DONT_USE_REMOTE | |
277 | ||
278 | ||
279 | #define PRINT_REGISTER_HOOK(regno) print_register_hook(regno) | |
280 | ||
5076de82 FF |
281 | int minimum_mode; |
282 | ||
283 | #define CALL_DUMMY_LENGTH 10 | |
01aa2b19 SG |
284 | |
285 | /* Fake variables to make it easy to use 24 bit register pointers */ | |
286 | ||
287 | int h8500_is_trapped_internalvar PARAMS ((char *name)); | |
288 | #define IS_TRAPPED_INTERNALVAR h8500_is_trapped_internalvar | |
289 | ||
24725cfe | 290 | struct value * h8500_value_of_trapped_internalvar (/* struct internalvar *var */); |
01aa2b19 SG |
291 | #define VALUE_OF_TRAPPED_INTERNALVAR h8500_value_of_trapped_internalvar |
292 | ||
9acdb2dc | 293 | void h8500_set_trapped_internalvar (/* struct internalvar *var, value newval, int bitpos, int bitsize, int offset */); |
01aa2b19 | 294 | #define SET_TRAPPED_INTERNALVAR h8500_set_trapped_internalvar |
7e721ed4 SC |
295 | |
296 | ||
297 | ||
298 | int regoff[NUM_REGS]; | |
299 | ||
300 | CORE_ADDR target_read_sp(); | |
301 | void target_write_sp PARAMS ((CORE_ADDR )); | |
302 | ||
303 | CORE_ADDR target_read_fp(); | |
304 | void target_write_fp PARAMS ((CORE_ADDR )); | |
305 | ||
306 | CORE_ADDR target_read_pc(); | |
307 | void target_write_pc PARAMS ((CORE_ADDR )); | |
308 | ||
309 | ||
310 | #define TARGET_READ_SP() target_read_sp() | |
311 | #define TARGET_WRITE_SP(x) target_write_sp(x) | |
312 | #define TARGET_READ_PC() target_read_pc() | |
313 | #define TARGET_WRITE_PC(x) target_write_pc(x) | |
314 | ||
315 | #define TARGET_READ_FP() target_read_fp() | |
316 | #define TARGET_WRITE_FP(x) target_write_fp(x) |