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c906108c | 1 | /* Parameters for execution on a H8/300 series machine. |
b6ba6518 KB |
2 | Copyright 1992, 1993, 1994, 1996, 1998, 1999, 2000 |
3 | Free Software Foundation, Inc. | |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | /* Contributed by Steve Chamberlain sac@cygnus.com */ | |
23 | ||
c906108c SS |
24 | struct frame_info; |
25 | struct frame_saved_regs; | |
26 | struct value; | |
27 | struct type; | |
c906108c | 28 | |
cc17453a EZ |
29 | /* 1 if debugging H8/300H application */ |
30 | ||
31 | /* NOTE: ezannoni 2000-07-18: these variables are part of sim, defined | |
32 | in sim/h8300/compile.c. They really should not be used this | |
33 | way. Because of this we cannot get rid of the macro | |
34 | GDB_TARGET_IS_H8300 in remote-e7000.c */ | |
c906108c SS |
35 | extern int h8300hmode; |
36 | extern int h8300smode; | |
37 | ||
38 | /* Number of bytes in a word */ | |
39 | ||
40 | #define BINWORD (h8300hmode?4:2) | |
41 | ||
42 | #define EXTRA_FRAME_INFO \ | |
43 | struct frame_saved_regs *fsr; \ | |
44 | CORE_ADDR from_pc; \ | |
45 | CORE_ADDR args_pointer;\ | |
46 | CORE_ADDR locals_pointer ; | |
47 | ||
48 | /* Zero the frame_saved_regs pointer when the frame is initialized, | |
49 | so that FRAME_FIND_SAVED_REGS () will know to allocate and | |
50 | initialize a frame_saved_regs struct the first time it is called. | |
51 | Set the arg_pointer to -1, which is not valid; 0 and other values | |
52 | indicate real, cached values. */ | |
53 | ||
54 | #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \ | |
55 | h8300_init_extra_frame_info (fromleaf, fi) | |
56 | ||
57 | extern void h8300_init_extra_frame_info (); | |
58 | ||
7355ddba | 59 | #define IEEE_FLOAT (1) |
c906108c SS |
60 | /* Define the bit, byte, and word ordering of the machine. */ |
61 | #define TARGET_BYTE_ORDER BIG_ENDIAN | |
62 | #undef TARGET_INT_BIT | |
63 | #define TARGET_INT_BIT 16 | |
64 | #undef TARGET_LONG_BIT | |
65 | #define TARGET_LONG_BIT 32 | |
66 | #undef TARGET_PTR_BIT | |
67 | #define TARGET_PTR_BIT (h8300hmode ? 32:16) | |
68 | ||
69 | /* Offset from address of function to start of its code. | |
70 | Zero on most machines. */ | |
71 | ||
72 | #define FUNCTION_START_OFFSET 0 | |
73 | ||
74 | /* Advance PC across any function entry prologue instructions | |
75 | to reach some "real" code. */ | |
76 | ||
b83266a0 | 77 | #define SKIP_PROLOGUE(ip) (h8300_skip_prologue(ip)) |
c906108c SS |
78 | extern CORE_ADDR h8300_skip_prologue (); |
79 | ||
80 | /* Immediately after a function call, return the saved pc. | |
81 | Can't always go through the frames for this because on some machines | |
82 | the new frame is not set up until the new function executes | |
83 | some instructions. */ | |
84 | ||
85 | #define SAVED_PC_AFTER_CALL(frame) \ | |
86 | read_memory_unsigned_integer (read_register (SP_REGNUM), BINWORD) | |
87 | ||
88 | /* Stack grows downward. */ | |
89 | ||
90 | #define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) | |
91 | ||
c5aa993b JM |
92 | /*#define BREAKPOINT {0x7A, 0xFF} */ |
93 | #define BREAKPOINT {0x01, 0x80} /* Sleep */ | |
94 | #define REMOTE_BREAKPOINT { 0x57, 0x30} /* trapa #3 */ | |
c906108c SS |
95 | /* If your kernel resets the pc after the trap happens you may need to |
96 | define this before including this file. */ | |
97 | ||
98 | #define DECR_PC_AFTER_BREAK 0 | |
99 | ||
100 | /* Say how long registers are. */ | |
101 | ||
102 | #define REGISTER_SIZE 4 | |
103 | ||
c5aa993b | 104 | #define NUM_REGS 13 |
c906108c SS |
105 | |
106 | #define REGISTER_BYTES (NUM_REGS * 4) | |
107 | ||
108 | /* Index within `registers' of the first byte of the space for | |
109 | register N. */ | |
110 | ||
111 | #define REGISTER_BYTE(N) ((N) * 4) | |
112 | ||
113 | /* Number of bytes of storage in the actual machine representation | |
114 | for register N. On the H8/300, all regs are 2 bytes. */ | |
115 | ||
116 | #define REGISTER_RAW_SIZE(N) (h8300hmode ? 4 : 2) | |
117 | ||
118 | /* Number of bytes of storage in the program's representation | |
119 | for register N. */ | |
120 | ||
121 | #define REGISTER_VIRTUAL_SIZE(N) (h8300hmode ? 4 : 2) | |
122 | ||
123 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
124 | ||
125 | #define MAX_REGISTER_RAW_SIZE 4 | |
126 | ||
127 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
128 | ||
129 | #define MAX_REGISTER_VIRTUAL_SIZE 4 | |
130 | ||
131 | /* Return the GDB type object for the "standard" data type | |
132 | of data in register N. */ | |
133 | ||
134 | #define REGISTER_VIRTUAL_TYPE(N) \ | |
135 | (h8300hmode ? builtin_type_unsigned_long : builtin_type_unsigned_short) | |
136 | ||
137 | /* Initializer for an array of names of registers. | |
138 | Entries beyond the first NUM_REGS are ignored. */ | |
139 | ||
140 | #define REGISTER_NAMES \ | |
141 | {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "sp", "ccr","pc","cycles","tick","inst"} | |
142 | ||
143 | /* An array of names of registers. */ | |
144 | ||
145 | extern char **h8300_register_names; | |
146 | #define REGISTER_NAME(i) h8300_register_names[i] | |
147 | ||
148 | /* Register numbers of various important registers. | |
149 | Note that some of these values are "real" register numbers, | |
150 | and correspond to the general registers of the machine, | |
151 | and some are "phony" register numbers which are too large | |
152 | to be actual register numbers as far as the user is concerned | |
153 | but do serve to get the desired values when passed to read_register. */ | |
154 | ||
155 | #define ARG0_REGNUM 0 /* first reg in which an arg may be passed */ | |
156 | #define ARGLAST_REGNUM 2 /* last reg in which an arg may be passed */ | |
157 | #define FP_REGNUM 6 /* Contain saddress of executing stack frame */ | |
158 | #define SP_REGNUM 7 /* Contains address of top of stack */ | |
159 | #define CCR_REGNUM 8 /* Contains processor status */ | |
160 | #define PC_REGNUM 9 /* Contains program counter */ | |
161 | ||
162 | /* Extract from an array REGBUF containing the (raw) register state | |
163 | a function return value of type TYPE, and copy that, in virtual format, | |
164 | into VALBUF. */ | |
165 | ||
166 | /* FIXME: Won't work with both h8/300's. */ | |
167 | ||
a14ed312 | 168 | extern void h8300_extract_return_value (struct type *, char *, char *); |
c906108c SS |
169 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ |
170 | h8300_extract_return_value (TYPE, (char *)(REGBUF), (char *)(VALBUF)) | |
171 | ||
172 | /* Write into appropriate registers a function return value | |
173 | of type TYPE, given in virtual format. Assumes floats are passed | |
174 | in d0/d1. */ | |
175 | /* FIXME: Won't work with both h8/300's. */ | |
176 | ||
a14ed312 | 177 | extern void h8300_store_return_value (struct type *, char *); |
c906108c SS |
178 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ |
179 | h8300_store_return_value(TYPE, (char *) (VALBUF)) | |
180 | ||
181 | /* struct passing and returning stuff */ | |
182 | #define STORE_STRUCT_RETURN(STRUCT_ADDR, SP) \ | |
183 | write_register (0, STRUCT_ADDR) | |
184 | ||
185 | #define USE_STRUCT_CONVENTION(gcc_p, type) (1) | |
186 | ||
187 | /* Extract from an array REGBUF containing the (raw) register state | |
188 | the address in which a function should return its structure value, | |
189 | as a CORE_ADDR (or an expression that can be used as one). */ | |
190 | ||
191 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ | |
192 | extract_address (REGBUF + REGISTER_BYTE (0), \ | |
193 | REGISTER_RAW_SIZE (0)) | |
c5aa993b | 194 | |
c906108c SS |
195 | /* Describe the pointer in each stack frame to the previous stack frame |
196 | (its caller). */ | |
197 | ||
198 | /* FRAME_CHAIN takes a frame's nominal address | |
199 | and produces the frame's chain-pointer. | |
200 | ||
201 | However, if FRAME_CHAIN_VALID returns zero, | |
202 | it means the given frame is the outermost one and has no caller. */ | |
203 | ||
204 | #define FRAME_CHAIN(FRAME) h8300_frame_chain(FRAME) | |
a14ed312 | 205 | CORE_ADDR h8300_frame_chain (struct frame_info *); |
c906108c SS |
206 | |
207 | /* In the case of the H8/300, the frame's nominal address | |
208 | is the address of a 2-byte word containing the calling frame's address. */ | |
209 | ||
210 | /* Use the alternate method of avoiding running up off the end of | |
211 | the frame chain or following frames back into the startup code. | |
212 | See the comments in objfile.h */ | |
213 | ||
c4093a6a | 214 | #define FRAME_CHAIN_VALID(fp,fi) func_frame_chain_valid (fp, fi) |
c906108c SS |
215 | |
216 | /* Define other aspects of the stack frame. */ | |
217 | ||
218 | /* A macro that tells us whether the function invocation represented | |
219 | by FI does not have a frame on the stack associated with it. If it | |
220 | does not, FRAMELESS is set to 1, else 0. */ | |
392a587b JM |
221 | #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
222 | (frameless_look_for_prologue (FI)) | |
c906108c SS |
223 | |
224 | /* Any function with a frame looks like this | |
225 | SECOND ARG | |
226 | FIRST ARG | |
227 | RET PC | |
228 | SAVED R2 | |
229 | SAVED R3 | |
230 | SAVED FP <-FP POINTS HERE | |
231 | LOCALS0 | |
232 | LOCALS1 <-SP POINTS HERE | |
c5aa993b | 233 | */ |
c906108c SS |
234 | |
235 | #define FRAME_SAVED_PC(FRAME) h8300_frame_saved_pc(FRAME) | |
236 | ||
237 | #define FRAME_ARGS_ADDRESS(fi) frame_args_address(fi) | |
238 | ||
239 | #define FRAME_LOCALS_ADDRESS(fi) frame_locals_address(fi); | |
240 | ||
241 | /* Set VAL to the number of args passed to frame described by FI. | |
242 | Can set VAL to -1, meaning no way to tell. */ | |
243 | ||
244 | /* We can't tell how many args there are | |
245 | now that the C compiler delays popping them. */ | |
246 | ||
392a587b | 247 | #define FRAME_NUM_ARGS(fi) (-1) |
c906108c SS |
248 | |
249 | /* Return number of bytes at start of arglist that are not really args. */ | |
250 | ||
251 | #define FRAME_ARGS_SKIP 0 | |
252 | ||
253 | /* Put here the code to store, into a struct frame_saved_regs, | |
254 | the addresses of the saved registers of frame described by FRAME_INFO. | |
255 | This includes special registers such as pc and fp saved in special | |
256 | ways in the stack frame. sp is even more special: | |
257 | the address we return for it IS the sp for the next frame. */ | |
258 | ||
259 | #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ | |
260 | h8300_frame_find_saved_regs(frame_info, &(frame_saved_regs)) | |
261 | \f | |
262 | ||
263 | typedef unsigned short INSN_WORD; | |
264 | ||
265 | ||
266 | #define PRINT_REGISTER_HOOK(regno) print_register_hook(regno) | |
267 | ||
268 | #define GDB_TARGET_IS_H8300 | |
269 | ||
270 | #define NUM_REALREGS 10 | |
c5aa993b | 271 | #define NOP { 0x01, 0x80} /* A sleep insn */ |
c906108c SS |
272 | |
273 | #define BELIEVE_PCC_PROMOTION 1 | |
274 | ||
275 | /* | |
276 | * CALL_DUMMY stuff: | |
277 | */ | |
278 | ||
7a292a7a | 279 | #define USE_GENERIC_DUMMY_FRAMES 1 |
c906108c SS |
280 | #define CALL_DUMMY {0} |
281 | #define CALL_DUMMY_LENGTH (0) | |
282 | #define CALL_DUMMY_ADDRESS() entry_point_address () | |
283 | #define CALL_DUMMY_LOCATION AT_ENTRY_POINT | |
284 | #define CALL_DUMMY_START_OFFSET (0) | |
285 | #define CALL_DUMMY_BREAKPOINT_OFFSET (0) | |
286 | ||
a14ed312 KB |
287 | extern CORE_ADDR h8300_push_arguments (int nargs, |
288 | struct value **args, | |
289 | CORE_ADDR sp, | |
290 | unsigned char struct_return, | |
291 | CORE_ADDR struct_addr); | |
292 | extern CORE_ADDR h8300_push_return_address (CORE_ADDR, CORE_ADDR); | |
c906108c | 293 | |
7a292a7a | 294 | #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP) |
c906108c SS |
295 | #define FIX_CALL_DUMMY(DUMMY, START_SP, FUNADDR, NARGS, ARGS, TYPE, GCCP) |
296 | #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \ | |
392a587b | 297 | (h8300_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR)) |
c906108c SS |
298 | /* Push an empty stack frame, to record the current PC, etc. */ |
299 | #define PUSH_DUMMY_FRAME generic_push_dummy_frame () | |
300 | /* Discard from the stack the innermost frame, restoring all registers. */ | |
301 | #define POP_FRAME h8300_pop_frame () | |
302 | #define PUSH_RETURN_ADDRESS(PC, SP) h8300_push_return_address (PC, SP) | |
303 | ||
304 | /* override the standard get_saved_register function with | |
305 | one that takes account of generic CALL_DUMMY frames */ | |
7a292a7a SS |
306 | #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \ |
307 | generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval) |