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c906108c SS |
1 | /* Parameters for execution on a H8/500 series machine. |
2 | Copyright (C) 1993, 1995 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 | #define GDB_TARGET_IS_H8500 | |
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 | ||
30 | /* Define the sizes of integers and pointers. */ | |
31 | ||
32 | #define TARGET_INT_BIT 16 | |
33 | ||
34 | #define TARGET_LONG_BIT 32 | |
35 | ||
36 | #define TARGET_PTR_BIT (minimum_mode ? 16 : 32) | |
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 | ||
b83266a0 | 46 | #define SKIP_PROLOGUE(ip) (h8500_skip_prologue (ip)) |
c906108c SS |
47 | extern CORE_ADDR h8500_skip_prologue PARAMS ((CORE_ADDR)); |
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 | ||
54 | #define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call() | |
55 | extern CORE_ADDR saved_pc_after_call PARAMS ((void)); | |
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 {0x0b} | |
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 | ||
71 | /* Say how long registers are. */ | |
72 | ||
73 | #define REGISTER_TYPE unsigned long | |
74 | ||
75 | /* Say how much memory is needed to store a copy of the register set */ | |
76 | ||
77 | #define REGISTER_BYTES (NUM_REGS * 4) | |
78 | ||
79 | /* Index within `registers' of the first byte of the space for | |
80 | register N. */ | |
81 | ||
82 | #define REGISTER_BYTE(N) ((N)*4) | |
83 | ||
84 | /* Number of bytes of storage in the actual machine representation | |
85 | for register N. */ | |
86 | ||
87 | #define REGISTER_RAW_SIZE(N) h8500_register_size(N) | |
88 | extern int h8500_register_size PARAMS ((int regno)); | |
89 | ||
90 | #define REGISTER_SIZE 4 | |
91 | ||
92 | #define REGISTER_VIRTUAL_SIZE(N) h8500_register_size(N) | |
93 | ||
94 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
95 | ||
96 | #define MAX_REGISTER_RAW_SIZE 4 | |
97 | ||
98 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
99 | ||
100 | #define MAX_REGISTER_VIRTUAL_SIZE 4 | |
101 | ||
102 | /* Return the GDB type object for the "standard" data type | |
103 | of data in register N. */ | |
104 | ||
105 | #define REGISTER_VIRTUAL_TYPE(N) h8500_register_virtual_type(N) | |
106 | extern struct type *h8500_register_virtual_type PARAMS ((int regno)); | |
107 | ||
108 | /* Initializer for an array of names of registers. | |
109 | Entries beyond the first NUM_REGS are ignored. */ | |
110 | ||
111 | #define REGISTER_NAMES \ | |
112 | { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ | |
113 | "pr0","pr1","pr2","pr3","pr4","pr5","pr6","pr7", \ | |
114 | "cp", "dp", "ep", "tp", "sr", "pc"} | |
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 R1_REGNUM 1 | |
125 | #define R2_REGNUM 2 | |
126 | #define R3_REGNUM 3 | |
127 | #define R4_REGNUM 4 | |
128 | #define R5_REGNUM 5 | |
129 | #define R6_REGNUM 6 | |
130 | #define R7_REGNUM 7 | |
131 | ||
132 | #define PR0_REGNUM 8 | |
133 | #define PR1_REGNUM 9 | |
134 | #define PR2_REGNUM 10 | |
135 | #define PR3_REGNUM 11 | |
136 | #define PR4_REGNUM 12 | |
137 | #define PR5_REGNUM 13 | |
138 | #define PR6_REGNUM 14 | |
139 | #define PR7_REGNUM 15 | |
140 | ||
141 | #define SEG_C_REGNUM 16 /* Segment registers */ | |
142 | #define SEG_D_REGNUM 17 | |
143 | #define SEG_E_REGNUM 18 | |
144 | #define SEG_T_REGNUM 19 | |
145 | ||
146 | #define CCR_REGNUM 20 /* Contains processor status */ | |
147 | #define PC_REGNUM 21 /* Contains program counter */ | |
148 | ||
149 | #define NUM_REGS 22 | |
150 | ||
151 | #define SP_REGNUM PR7_REGNUM /* Contains address of top of stack */ | |
152 | #define FP_REGNUM PR6_REGNUM /* Contains address of executing stack frame */ | |
153 | ||
154 | #define PTR_SIZE (minimum_mode ? 2 : 4) | |
155 | #define PTR_MASK (minimum_mode ? 0x0000ffff : 0x00ffffff) | |
156 | ||
157 | /* Store the address of the place in which to copy the structure the | |
158 | subroutine will return. This is called from call_function. */ | |
159 | ||
160 | /*#define STORE_STRUCT_RETURN(ADDR, SP) \ | |
161 | { write_register (0, (ADDR)); abort(); }*/ | |
162 | ||
163 | /* Extract from an array REGBUF containing the (raw) register state | |
164 | a function return value of type TYPE, and copy that, in virtual format, | |
165 | into VALBUF. */ | |
166 | ||
167 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
168 | memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE)) | |
169 | ||
170 | /* Write into appropriate registers a function return value | |
171 | of type TYPE, given in virtual format. */ | |
172 | ||
173 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
174 | write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)) | |
175 | ||
176 | /* Extract from an array REGBUF containing the (raw) register state | |
177 | the address in which a function should return its structure value, | |
178 | as a CORE_ADDR (or an expression that can be used as one). */ | |
179 | ||
180 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF)) | |
181 | ||
182 | \f | |
183 | /* Define other aspects of the stack frame. */ | |
184 | ||
185 | /* A macro that tells us whether the function invocation represented | |
186 | by FI does not have a frame on the stack associated with it. If it | |
187 | does not, FRAMELESS is set to 1, else 0. */ | |
188 | ||
392a587b JM |
189 | #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
190 | (frameless_look_for_prologue (FI)) | |
c906108c SS |
191 | |
192 | /* Any function with a frame looks like this | |
193 | SECOND ARG | |
194 | FIRST ARG | |
195 | RET PC | |
196 | SAVED R2 | |
197 | SAVED R3 | |
198 | SAVED FP <-FP POINTS HERE | |
199 | LOCALS0 | |
200 | LOCALS1 <-SP POINTS HERE | |
201 | ||
202 | */ | |
203 | ||
204 | #define INIT_EXTRA_FRAME_INFO(fromleaf, fci) ; | |
205 | /* (fci)->frame |= read_register(SEG_T_REGNUM) << 16;*/ | |
206 | ||
207 | #define FRAME_CHAIN(FRAME) h8500_frame_chain(FRAME) | |
208 | struct frame_info; | |
209 | extern CORE_ADDR h8500_frame_chain PARAMS ((struct frame_info *)); | |
210 | ||
211 | #define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME) | |
212 | extern CORE_ADDR frame_saved_pc PARAMS ((struct frame_info *frame)); | |
213 | ||
214 | #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame) | |
215 | ||
216 | #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) | |
217 | ||
218 | /* Set VAL to the number of args passed to frame described by FI. | |
219 | Can set VAL to -1, meaning no way to tell. */ | |
220 | ||
221 | /* We can't tell how many args there are | |
222 | now that the C compiler delays popping them. */ | |
223 | ||
392a587b | 224 | #define FRAME_NUM_ARGS(fi) (-1) |
c906108c SS |
225 | |
226 | /* Return number of bytes at start of arglist that are not really args. */ | |
227 | ||
228 | #define FRAME_ARGS_SKIP 0 | |
229 | ||
230 | /* Put here the code to store, into a struct frame_saved_regs, | |
231 | the addresses of the saved registers of frame described by FRAME_INFO. | |
232 | This includes special registers such as pc and fp saved in special | |
233 | ways in the stack frame. sp is even more special: | |
234 | the address we return for it IS the sp for the next frame. */ | |
235 | ||
236 | #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ | |
237 | frame_find_saved_regs(frame_info, &(frame_saved_regs)) | |
238 | struct frame_saved_regs; | |
239 | extern void frame_find_saved_regs PARAMS ((struct frame_info *frame_info, struct frame_saved_regs *frame_saved_regs)); | |
240 | \f | |
241 | ||
242 | /* Discard from the stack the innermost frame, restoring all registers. */ | |
243 | ||
244 | #define POP_FRAME { h8500_pop_frame (); } | |
245 | extern void h8500_pop_frame PARAMS ((void)); | |
246 | ||
247 | #define SHORT_INT_MAX 32767 | |
248 | #define SHORT_INT_MIN -32768 | |
249 | ||
250 | #define NAMES_HAVE_UNDERSCORE | |
251 | ||
252 | typedef unsigned short INSN_WORD; | |
253 | ||
254 | extern CORE_ADDR h8500_addr_bits_remove PARAMS ((CORE_ADDR)); | |
255 | #define ADDR_BITS_REMOVE(addr) h8500_addr_bits_remove (addr) | |
256 | ||
257 | #define read_memory_short(x) (read_memory_integer(x,2) & 0xffff) | |
258 | ||
259 | #define PRINT_REGISTER_HOOK(regno) print_register_hook(regno) | |
260 | extern void print_register_hook PARAMS ((int)); | |
261 | ||
262 | extern int minimum_mode; | |
263 | ||
264 | #define CALL_DUMMY_LENGTH 10 | |
265 | ||
266 | /* Fake variables to make it easy to use 24 bit register pointers */ | |
267 | ||
268 | #define IS_TRAPPED_INTERNALVAR h8500_is_trapped_internalvar | |
269 | extern int h8500_is_trapped_internalvar PARAMS ((char *name)); | |
270 | ||
271 | #define VALUE_OF_TRAPPED_INTERNALVAR h8500_value_of_trapped_internalvar | |
272 | extern struct value * h8500_value_of_trapped_internalvar (/* struct internalvar *var */); | |
273 | ||
274 | #define SET_TRAPPED_INTERNALVAR h8500_set_trapped_internalvar | |
275 | extern void h8500_set_trapped_internalvar (/* struct internalvar *var, value newval, int bitpos, int bitsize, int offset */); | |
276 | ||
277 | extern CORE_ADDR h8500_read_sp PARAMS ((void)); | |
278 | extern void h8500_write_sp PARAMS ((CORE_ADDR)); | |
279 | ||
280 | extern CORE_ADDR h8500_read_fp PARAMS ((void)); | |
281 | extern void h8500_write_fp PARAMS ((CORE_ADDR)); | |
282 | ||
283 | extern CORE_ADDR h8500_read_pc PARAMS ((int)); | |
284 | extern void h8500_write_pc PARAMS ((CORE_ADDR, int)); | |
285 | ||
286 | #define TARGET_READ_SP() h8500_read_sp() | |
287 | #define TARGET_WRITE_SP(x) h8500_write_sp(x) | |
288 | ||
289 | #define TARGET_READ_PC(pid) h8500_read_pc(pid) | |
290 | #define TARGET_WRITE_PC(x,pid) h8500_write_pc(x,pid) | |
291 | ||
292 | #define TARGET_READ_FP() h8500_read_fp() | |
293 | #define TARGET_WRITE_FP(x) h8500_write_fp(x) |