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5076de82 | 1 | /* Parameters for execution on a H8/500 series machine. |
ec7b6fcf | 2 | Copyright (C) 1993, 1995 Free Software Foundation, Inc. |
5076de82 FF |
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 | |
6c9638b4 | 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
5076de82 FF |
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 | ||
ec7b6fcf SS |
30 | /* Define the sizes of integers and pointers. */ |
31 | ||
5076de82 | 32 | #define TARGET_INT_BIT 16 |
e24270fc | 33 | |
3b5b5075 | 34 | #define TARGET_LONG_BIT 32 |
e24270fc | 35 | |
5076de82 FF |
36 | #define TARGET_PTR_BIT (minimum_mode ? 16 : 32) |
37 | ||
5076de82 FF |
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 | ||
ec7b6fcf SS |
46 | #define SKIP_PROLOGUE(ip) { (ip) = h8500_skip_prologue(ip); } |
47 | extern CORE_ADDR h8500_skip_prologue PARAMS ((CORE_ADDR)); | |
5076de82 FF |
48 | |
49 | /* Immediately after a function call, return the saved pc. | |
50 | Can't always go through the frames for this because on some machines | |
51 | the new frame is not set up until the new function executes | |
52 | some instructions. */ | |
53 | ||
ec7b6fcf SS |
54 | #define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call() |
55 | extern CORE_ADDR saved_pc_after_call PARAMS ((void)); | |
5076de82 FF |
56 | |
57 | /* Stack grows downward. */ | |
58 | ||
59 | #define INNER_THAN < | |
60 | ||
61 | /* Illegal instruction - used by the simulator for breakpoint | |
62 | detection */ | |
5076de82 | 63 | |
ec7b6fcf | 64 | #define BREAKPOINT {0x0b} |
5076de82 FF |
65 | |
66 | /* If your kernel resets the pc after the trap happens you may need to | |
67 | define this before including this file. */ | |
68 | ||
69 | #define DECR_PC_AFTER_BREAK 0 | |
70 | ||
ec7b6fcf | 71 | #if 0 /* never used */ |
5076de82 FF |
72 | /* Nonzero if instruction at PC is a return instruction. */ |
73 | ||
74 | #define ABOUT_TO_RETURN(pc) about_to_return(pc) | |
ec7b6fcf | 75 | #endif |
5076de82 | 76 | |
e24270fc | 77 | /* Say how long registers are. */ |
5076de82 | 78 | |
e24270fc | 79 | #define REGISTER_TYPE unsigned long |
5076de82 FF |
80 | |
81 | /* Say how much memory is needed to store a copy of the register set */ | |
82 | ||
3b5b5075 | 83 | #define REGISTER_BYTES (NUM_REGS * 4) |
5076de82 FF |
84 | |
85 | /* Index within `registers' of the first byte of the space for | |
86 | register N. */ | |
87 | ||
3b5b5075 | 88 | #define REGISTER_BYTE(N) ((N)*4) |
5076de82 FF |
89 | |
90 | /* Number of bytes of storage in the actual machine representation | |
91 | for register N. */ | |
92 | ||
01aa2b19 | 93 | #define REGISTER_RAW_SIZE(N) h8500_register_size(N) |
ec7b6fcf | 94 | extern int h8500_register_size PARAMS ((int regno)); |
5076de82 | 95 | |
e24270fc SC |
96 | #define REGISTER_SIZE 4 |
97 | ||
01aa2b19 | 98 | #define REGISTER_VIRTUAL_SIZE(N) h8500_register_size(N) |
5076de82 FF |
99 | |
100 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
101 | ||
102 | #define MAX_REGISTER_RAW_SIZE 4 | |
103 | ||
104 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
105 | ||
106 | #define MAX_REGISTER_VIRTUAL_SIZE 4 | |
107 | ||
5076de82 FF |
108 | /* Return the GDB type object for the "standard" data type |
109 | of data in register N. */ | |
5076de82 | 110 | |
01aa2b19 | 111 | #define REGISTER_VIRTUAL_TYPE(N) h8500_register_virtual_type(N) |
ec7b6fcf | 112 | extern struct type *h8500_register_virtual_type PARAMS ((int regno)); |
5076de82 FF |
113 | |
114 | /* Initializer for an array of names of registers. | |
115 | Entries beyond the first NUM_REGS are ignored. */ | |
116 | ||
117 | #define REGISTER_NAMES \ | |
ec7b6fcf SS |
118 | { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ |
119 | "pr0","pr1","pr2","pr3","pr4","pr5","pr6","pr7", \ | |
120 | "cp", "dp", "ep", "tp", "sr", "pc"} | |
5076de82 | 121 | |
ec7b6fcf SS |
122 | /* Register numbers of various important registers. Note that some of |
123 | these values are "real" register numbers, and correspond to the | |
124 | general registers of the machine, and some are "phony" register | |
125 | numbers which are too large to be actual register numbers as far as | |
126 | the user is concerned but do serve to get the desired values when | |
127 | passed to read_register. */ | |
5076de82 | 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 | |
3b5b5075 SC |
138 | #define PR0_REGNUM 8 |
139 | #define PR1_REGNUM 9 | |
140 | #define PR2_REGNUM 10 | |
141 | #define PR3_REGNUM 11 | |
142 | #define PR4_REGNUM 12 | |
143 | #define PR5_REGNUM 13 | |
144 | #define PR6_REGNUM 14 | |
145 | #define PR7_REGNUM 15 | |
146 | ||
147 | #define SEG_C_REGNUM 16 /* Segment registers */ | |
148 | #define SEG_D_REGNUM 17 | |
149 | #define SEG_E_REGNUM 18 | |
150 | #define SEG_T_REGNUM 19 | |
151 | ||
3b5b5075 SC |
152 | #define CCR_REGNUM 20 /* Contains processor status */ |
153 | #define PC_REGNUM 21 /* Contains program counter */ | |
154 | ||
3b5b5075 | 155 | #define NUM_REGS 22 |
5076de82 | 156 | |
3b5b5075 SC |
157 | #define SP_REGNUM PR7_REGNUM /* Contains address of top of stack */ |
158 | #define FP_REGNUM PR6_REGNUM /* Contains address of executing stack frame */ | |
5076de82 | 159 | |
ec7b6fcf | 160 | #define PTR_SIZE (minimum_mode ? 2 : 4) |
5076de82 FF |
161 | #define PTR_MASK (minimum_mode ? 0x0000ffff : 0x00ffffff) |
162 | ||
163 | /* Store the address of the place in which to copy the structure the | |
164 | subroutine will return. This is called from call_function. */ | |
165 | ||
166 | /*#define STORE_STRUCT_RETURN(ADDR, SP) \ | |
167 | { write_register (0, (ADDR)); abort(); }*/ | |
168 | ||
169 | /* Extract from an array REGBUF containing the (raw) register state | |
170 | a function return value of type TYPE, and copy that, in virtual format, | |
171 | into VALBUF. */ | |
172 | ||
173 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
ade40d31 | 174 | memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE)) |
5076de82 | 175 | |
5076de82 | 176 | /* Write into appropriate registers a function return value |
ec7b6fcf | 177 | of type TYPE, given in virtual format. */ |
5076de82 FF |
178 | |
179 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
180 | write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)) | |
181 | ||
5076de82 FF |
182 | /* Extract from an array REGBUF containing the (raw) register state |
183 | the address in which a function should return its structure value, | |
184 | as a CORE_ADDR (or an expression that can be used as one). */ | |
185 | ||
186 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF)) | |
5076de82 | 187 | |
ec7b6fcf | 188 | \f |
5076de82 FF |
189 | /* Define other aspects of the stack frame. */ |
190 | ||
191 | /* A macro that tells us whether the function invocation represented | |
192 | by FI does not have a frame on the stack associated with it. If it | |
193 | does not, FRAMELESS is set to 1, else 0. */ | |
ec7b6fcf | 194 | |
5076de82 FF |
195 | #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \ |
196 | (FRAMELESS) = frameless_look_for_prologue(FI) | |
197 | ||
198 | /* Any function with a frame looks like this | |
199 | SECOND ARG | |
200 | FIRST ARG | |
201 | RET PC | |
202 | SAVED R2 | |
203 | SAVED R3 | |
204 | SAVED FP <-FP POINTS HERE | |
205 | LOCALS0 | |
206 | LOCALS1 <-SP POINTS HERE | |
207 | ||
208 | */ | |
01aa2b19 | 209 | |
3b5b5075 SC |
210 | #define INIT_EXTRA_FRAME_INFO(fromleaf, fci) ; |
211 | /* (fci)->frame |= read_register(SEG_T_REGNUM) << 16;*/ | |
01aa2b19 SG |
212 | |
213 | #define FRAME_CHAIN(FRAME) h8500_frame_chain(FRAME) | |
ec7b6fcf SS |
214 | struct frame_info; |
215 | extern CORE_ADDR h8500_frame_chain PARAMS ((struct frame_info *)); | |
01aa2b19 | 216 | |
5076de82 | 217 | #define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME) |
ec7b6fcf | 218 | extern CORE_ADDR frame_saved_pc PARAMS ((struct frame_info *frame)); |
5076de82 | 219 | |
ec7b6fcf | 220 | #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame) |
5076de82 | 221 | |
ec7b6fcf | 222 | #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) |
5076de82 FF |
223 | |
224 | /* Set VAL to the number of args passed to frame described by FI. | |
225 | Can set VAL to -1, meaning no way to tell. */ | |
226 | ||
227 | /* We can't tell how many args there are | |
228 | now that the C compiler delays popping them. */ | |
229 | ||
230 | #define FRAME_NUM_ARGS(val,fi) (val = -1) | |
231 | ||
232 | /* Return number of bytes at start of arglist that are not really args. */ | |
233 | ||
234 | #define FRAME_ARGS_SKIP 0 | |
235 | ||
236 | /* Put here the code to store, into a struct frame_saved_regs, | |
237 | the addresses of the saved registers of frame described by FRAME_INFO. | |
238 | This includes special registers such as pc and fp saved in special | |
239 | ways in the stack frame. sp is even more special: | |
240 | the address we return for it IS the sp for the next frame. */ | |
241 | ||
242 | #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ | |
243 | frame_find_saved_regs(frame_info, &(frame_saved_regs)) | |
ec7b6fcf SS |
244 | struct frame_saved_regs; |
245 | extern void frame_find_saved_regs PARAMS ((struct frame_info *frame_info, struct frame_saved_regs *frame_saved_regs)); | |
5076de82 FF |
246 | \f |
247 | ||
5076de82 FF |
248 | /* Discard from the stack the innermost frame, restoring all registers. */ |
249 | ||
ec7b6fcf SS |
250 | #define POP_FRAME { h8500_pop_frame (); } |
251 | extern void h8500_pop_frame PARAMS ((void)); | |
5076de82 FF |
252 | |
253 | #define SHORT_INT_MAX 32767 | |
254 | #define SHORT_INT_MIN -32768 | |
255 | ||
5076de82 FF |
256 | #define NAMES_HAVE_UNDERSCORE |
257 | ||
258 | typedef unsigned short INSN_WORD; | |
259 | ||
260 | #define ADDR_BITS_REMOVE(addr) ((addr) & 0xffffff) | |
5076de82 FF |
261 | |
262 | #define read_memory_short(x) (read_memory_integer(x,2) & 0xffff) | |
5076de82 FF |
263 | |
264 | #define PRINT_REGISTER_HOOK(regno) print_register_hook(regno) | |
ec7b6fcf | 265 | extern void print_register_hook PARAMS ((int)); |
5076de82 | 266 | |
ec7b6fcf | 267 | extern int minimum_mode; |
5076de82 FF |
268 | |
269 | #define CALL_DUMMY_LENGTH 10 | |
01aa2b19 SG |
270 | |
271 | /* Fake variables to make it easy to use 24 bit register pointers */ | |
272 | ||
01aa2b19 | 273 | #define IS_TRAPPED_INTERNALVAR h8500_is_trapped_internalvar |
ec7b6fcf | 274 | extern int h8500_is_trapped_internalvar PARAMS ((char *name)); |
01aa2b19 | 275 | |
01aa2b19 | 276 | #define VALUE_OF_TRAPPED_INTERNALVAR h8500_value_of_trapped_internalvar |
ec7b6fcf | 277 | extern struct value * h8500_value_of_trapped_internalvar (/* struct internalvar *var */); |
01aa2b19 | 278 | |
01aa2b19 | 279 | #define SET_TRAPPED_INTERNALVAR h8500_set_trapped_internalvar |
ec7b6fcf | 280 | extern void h8500_set_trapped_internalvar (/* struct internalvar *var, value newval, int bitpos, int bitsize, int offset */); |
7e721ed4 | 281 | |
ec7b6fcf SS |
282 | extern CORE_ADDR h8500_read_sp PARAMS ((void)); |
283 | extern void h8500_write_sp PARAMS ((CORE_ADDR)); | |
7e721ed4 | 284 | |
ec7b6fcf SS |
285 | extern CORE_ADDR h8500_read_fp PARAMS ((void)); |
286 | extern void h8500_write_fp PARAMS ((CORE_ADDR)); | |
7e721ed4 | 287 | |
ec7b6fcf SS |
288 | extern CORE_ADDR h8500_read_pc PARAMS ((int)); |
289 | extern void h8500_write_pc PARAMS ((CORE_ADDR, int)); | |
7e721ed4 | 290 | |
f4eb9968 SS |
291 | #define TARGET_READ_SP() h8500_read_sp() |
292 | #define TARGET_WRITE_SP(x) h8500_write_sp(x) | |
7e721ed4 | 293 | |
f4eb9968 SS |
294 | #define TARGET_READ_PC(pid) h8500_read_pc(pid) |
295 | #define TARGET_WRITE_PC(x,pid) h8500_write_pc(x,pid) | |
7e721ed4 | 296 | |
f4eb9968 SS |
297 | #define TARGET_READ_FP() h8500_read_fp() |
298 | #define TARGET_WRITE_FP(x) h8500_write_fp(x) |