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c906108c SS |
1 | /* Target-specific definition for the Mitsubishi D10V |
2 | Copyright (C) 1996 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 Martin Hunt, hunt@cygnus.com */ | |
21 | ||
22 | #define GDB_TARGET_IS_D10V | |
23 | ||
24 | /* Define the bit, byte, and word ordering of the machine. */ | |
25 | ||
26 | #define TARGET_BYTE_ORDER BIG_ENDIAN | |
27 | ||
28 | /* Offset from address of function to start of its code. | |
29 | Zero on most machines. */ | |
30 | ||
31 | #define FUNCTION_START_OFFSET 0 | |
32 | ||
33 | /* these are the addresses the D10V-EVA board maps data */ | |
34 | /* and instruction memory to. */ | |
35 | ||
36 | #define DMEM_START 0x0000000 | |
37 | #define IMEM_START 0x1000000 | |
38 | #define STACK_START 0x0007ffe | |
39 | ||
40 | #ifdef __STDC__ /* Forward decls for prototypes */ | |
41 | struct frame_info; | |
42 | struct frame_saved_regs; | |
43 | struct type; | |
44 | struct value; | |
45 | #endif | |
46 | ||
47 | /* Advance PC across any function entry prologue instructions | |
48 | to reach some "real" code. */ | |
49 | ||
50 | extern CORE_ADDR d10v_skip_prologue (); | |
51 | #define SKIP_PROLOGUE(ip) \ | |
52 | {(ip) = d10v_skip_prologue(ip);} | |
53 | ||
54 | ||
55 | /* Stack grows downward. */ | |
56 | #define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) | |
57 | ||
58 | /* for a breakpoint, use "dbt || nop" */ | |
59 | #define BREAKPOINT {0x2f, 0x90, 0x5e, 0x00} | |
60 | ||
61 | /* If your kernel resets the pc after the trap happens you may need to | |
62 | define this before including this file. */ | |
63 | #define DECR_PC_AFTER_BREAK 4 | |
64 | ||
65 | #define REGISTER_NAMES \ | |
66 | { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ | |
67 | "r8", "r9", "r10","r11","r12", "r13", "r14","r15",\ | |
68 | "psw","bpsw","pc","bpc", "cr4", "cr5", "cr6", "rpt_c",\ | |
69 | "rpt_s","rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "cr15",\ | |
70 | "imap0","imap1","dmap","a0", "a1"\ | |
71 | } | |
72 | ||
73 | #define NUM_REGS 37 | |
74 | ||
75 | /* Register numbers of various important registers. | |
76 | Note that some of these values are "real" register numbers, | |
77 | and correspond to the general registers of the machine, | |
78 | and some are "phony" register numbers which are too large | |
79 | to be actual register numbers as far as the user is concerned | |
80 | but do serve to get the desired values when passed to read_register. */ | |
81 | ||
82 | #define R0_REGNUM 0 | |
83 | #define LR_REGNUM 13 | |
84 | #define SP_REGNUM 15 | |
85 | #define FP_REGNUM 11 | |
86 | #define PC_REGNUM 18 | |
87 | #define PSW_REGNUM 16 | |
88 | #define IMAP0_REGNUM 32 | |
89 | #define IMAP1_REGNUM 33 | |
90 | #define DMAP_REGNUM 34 | |
91 | #define A0_REGNUM 35 | |
92 | ||
93 | /* Say how much memory is needed to store a copy of the register set */ | |
94 | #define REGISTER_BYTES ((NUM_REGS-2)*2+16) | |
95 | ||
96 | /* Index within `registers' of the first byte of the space for | |
97 | register N. */ | |
98 | ||
99 | #define REGISTER_BYTE(N) \ | |
100 | ( ((N) > A0_REGNUM) ? ( ((N)-A0_REGNUM)*8 + A0_REGNUM*2 ) : ((N) * 2) ) | |
101 | ||
102 | /* Number of bytes of storage in the actual machine representation | |
103 | for register N. */ | |
104 | ||
105 | #define REGISTER_RAW_SIZE(N) ( ((N) >= A0_REGNUM) ? 8 : 2 ) | |
106 | ||
107 | /* Number of bytes of storage in the program's representation | |
108 | for register N. */ | |
109 | #define REGISTER_VIRTUAL_SIZE(N) ( ((N) >= A0_REGNUM) ? 8 : ( ((N) == PC_REGNUM || (N) == SP_REGNUM) ? 4 : 2 )) | |
110 | ||
111 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
112 | ||
113 | #define MAX_REGISTER_RAW_SIZE 8 | |
114 | ||
115 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
116 | ||
117 | #define MAX_REGISTER_VIRTUAL_SIZE 8 | |
118 | ||
119 | /* Return the GDB type object for the "standard" data type | |
120 | of data in register N. */ | |
121 | ||
122 | #define REGISTER_VIRTUAL_TYPE(N) \ | |
123 | ( ((N) < A0_REGNUM ) ? ((N) == PC_REGNUM || (N) == SP_REGNUM ? builtin_type_long : builtin_type_short) : builtin_type_long_long) | |
124 | ||
125 | ||
126 | /* convert $pc and $sp to/from virtual addresses */ | |
127 | #define REGISTER_CONVERTIBLE(N) ((N) == PC_REGNUM || (N) == SP_REGNUM) | |
128 | #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \ | |
129 | { \ | |
130 | ULONGEST x = extract_unsigned_integer ((FROM), REGISTER_RAW_SIZE (REGNUM)); \ | |
131 | if (REGNUM == PC_REGNUM) x = (x << 2) | IMEM_START; \ | |
132 | else x |= DMEM_START; \ | |
133 | store_unsigned_integer ((TO), TYPE_LENGTH(TYPE), x); \ | |
134 | } | |
135 | #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \ | |
136 | { \ | |
137 | ULONGEST x = extract_unsigned_integer ((FROM), TYPE_LENGTH(TYPE)); \ | |
138 | x &= 0x3ffff; \ | |
139 | if (REGNUM == PC_REGNUM) x >>= 2; \ | |
140 | store_unsigned_integer ((TO), 2, x); \ | |
141 | } | |
142 | ||
143 | #define D10V_MAKE_DADDR(x) ((x) | DMEM_START) | |
144 | #define D10V_MAKE_IADDR(x) (((x) << 2) | IMEM_START) | |
145 | ||
146 | #define D10V_DADDR_P(X) (((X) & 0x3000000) == DMEM_START) | |
147 | #define D10V_IADDR_P(X) (((X) & 0x3000000) == IMEM_START) | |
148 | ||
149 | #define D10V_CONVERT_IADDR_TO_RAW(X) (((X) >> 2) & 0xffff) | |
150 | #define D10V_CONVERT_DADDR_TO_RAW(X) ((X) & 0xffff) | |
151 | ||
152 | #define ARG1_REGNUM R0_REGNUM | |
153 | #define ARGN_REGNUM 3 | |
154 | #define RET1_REGNUM R0_REGNUM | |
155 | ||
156 | /* Store the address of the place in which to copy the structure the | |
157 | subroutine will return. This is called from call_function. | |
158 | ||
159 | We store structs through a pointer passed in the first Argument | |
160 | register. */ | |
161 | ||
162 | #define STORE_STRUCT_RETURN(ADDR, SP) \ | |
163 | { write_register (ARG1_REGNUM, (ADDR)); } | |
164 | ||
165 | ||
166 | /* Write into appropriate registers a function return value | |
167 | of type TYPE, given in virtual format. | |
168 | ||
169 | Things always get returned in RET1_REGNUM, RET2_REGNUM, ... */ | |
170 | ||
171 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
172 | write_register_bytes (REGISTER_BYTE(RET1_REGNUM), VALBUF, TYPE_LENGTH (TYPE)) | |
173 | ||
174 | ||
175 | /* Extract from an array REGBUF containing the (raw) register state | |
176 | the address in which a function should return its structure value, | |
177 | as a CORE_ADDR (or an expression that can be used as one). */ | |
178 | ||
179 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ | |
180 | (extract_address ((REGBUF) + REGISTER_BYTE (ARG1_REGNUM), REGISTER_RAW_SIZE (ARG1_REGNUM)) | DMEM_START) | |
181 | ||
182 | /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of | |
183 | EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc | |
184 | and TYPE is the type (which is known to be struct, union or array). | |
185 | ||
186 | The d10v returns anything less than 8 bytes in size in | |
187 | registers. */ | |
188 | ||
189 | extern use_struct_convention_fn d10v_use_struct_convention; | |
190 | #define USE_STRUCT_CONVENTION(gcc_p, type) d10v_use_struct_convention (gcc_p, type) | |
191 | ||
192 | \f | |
193 | ||
194 | /* Define other aspects of the stack frame. | |
195 | we keep a copy of the worked out return pc lying around, since it | |
196 | is a useful bit of info */ | |
197 | ||
198 | #define EXTRA_FRAME_INFO \ | |
199 | CORE_ADDR return_pc; \ | |
200 | int frameless; \ | |
201 | int size; | |
202 | ||
203 | #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \ | |
204 | d10v_init_extra_frame_info(fromleaf, fi) | |
205 | ||
206 | extern void d10v_init_extra_frame_info PARAMS (( int fromleaf, struct frame_info *fi )); | |
207 | ||
208 | /* A macro that tells us whether the function invocation represented | |
209 | by FI does not have a frame on the stack associated with it. If it | |
210 | does not, FRAMELESS is set to 1, else 0. */ | |
211 | ||
212 | #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \ | |
213 | (FRAMELESS) = frameless_look_for_prologue(FI) | |
214 | ||
215 | #define FRAME_CHAIN(FRAME) d10v_frame_chain(FRAME) | |
216 | extern int d10v_frame_chain_valid PARAMS ((CORE_ADDR, struct frame_info *)); | |
217 | #define FRAME_CHAIN_VALID(chain, thisframe) d10v_frame_chain_valid (chain, thisframe) | |
218 | #define FRAME_SAVED_PC(FRAME) ((FRAME)->return_pc) | |
219 | #define FRAME_ARGS_ADDRESS(fi) (fi)->frame | |
220 | #define FRAME_LOCALS_ADDRESS(fi) (fi)->frame | |
221 | ||
222 | /* Immediately after a function call, return the saved pc. We can't */ | |
223 | /* use frame->return_pc beause that is determined by reading R13 off the */ | |
224 | /*stack and that may not be written yet. */ | |
225 | ||
226 | #define SAVED_PC_AFTER_CALL(frame) ((read_register(LR_REGNUM) << 2) | IMEM_START) | |
227 | ||
228 | /* Set VAL to the number of args passed to frame described by FI. | |
229 | Can set VAL to -1, meaning no way to tell. */ | |
230 | /* We can't tell how many args there are */ | |
231 | ||
232 | #define FRAME_NUM_ARGS(val,fi) (val = -1) | |
233 | ||
234 | /* Return number of bytes at start of arglist that are not really args. */ | |
235 | ||
236 | #define FRAME_ARGS_SKIP 0 | |
237 | ||
238 | ||
239 | /* Put here the code to store, into a struct frame_saved_regs, | |
240 | the addresses of the saved registers of frame described by FRAME_INFO. | |
241 | This includes special registers such as pc and fp saved in special | |
242 | ways in the stack frame. sp is even more special: | |
243 | the address we return for it IS the sp for the next frame. */ | |
244 | ||
245 | #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ | |
246 | d10v_frame_find_saved_regs(frame_info, &(frame_saved_regs)) | |
247 | ||
248 | extern void d10v_frame_find_saved_regs PARAMS ((struct frame_info *, struct frame_saved_regs *)); | |
249 | ||
250 | #define NAMES_HAVE_UNDERSCORE | |
251 | ||
252 | ||
253 | /* DUMMY FRAMES. Need these to support inferior function calls. They | |
254 | work like this on D10V: First we set a breakpoint at 0 or __start. | |
255 | Then we push all the registers onto the stack. Then put the | |
256 | function arguments in the proper registers and set r13 to our | |
257 | breakpoint address. Finally, the PC is set to the start of the | |
258 | function being called (no JSR/BSR insn). When it hits the | |
259 | breakpoint, clear the break point and pop the old register contents | |
260 | off the stack. */ | |
261 | ||
262 | extern void d10v_pop_frame PARAMS ((struct frame_info *frame)); | |
263 | #define POP_FRAME generic_pop_current_frame (d10v_pop_frame) | |
264 | ||
265 | #define USE_GENERIC_DUMMY_FRAMES | |
266 | #define CALL_DUMMY {0} | |
267 | #define CALL_DUMMY_START_OFFSET (0) | |
268 | #define CALL_DUMMY_BREAKPOINT_OFFSET (0) | |
269 | #define CALL_DUMMY_LOCATION AT_ENTRY_POINT | |
270 | #define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP) | |
271 | #define CALL_DUMMY_ADDRESS() entry_point_address () | |
272 | extern CORE_ADDR d10v_push_return_address PARAMS ((CORE_ADDR pc, CORE_ADDR sp)); | |
273 | #define PUSH_RETURN_ADDRESS(PC, SP) d10v_push_return_address (PC, SP) | |
274 | ||
275 | #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP) | |
276 | /* #define PC_IN_CALL_DUMMY(pc, sp, frame_address) ( pc == IMEM_START + 4 ) */ | |
277 | ||
278 | #define PUSH_DUMMY_FRAME generic_push_dummy_frame () | |
279 | ||
280 | /* override the default get_saved_register function with one that | |
281 | takes account of generic CALL_DUMMY frames */ | |
282 | #define GET_SAVED_REGISTER | |
283 | #define get_saved_register generic_get_saved_register | |
284 | ||
285 | #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \ | |
286 | sp = d10v_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr)) | |
287 | extern CORE_ADDR d10v_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR)); | |
288 | ||
289 | ||
290 | /* Extract from an array REGBUF containing the (raw) register state | |
291 | a function return value of type TYPE, and copy that, in virtual format, | |
292 | into VALBUF. */ | |
293 | ||
294 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
295 | d10v_extract_return_value(TYPE, REGBUF, VALBUF) | |
296 | extern void | |
297 | d10v_extract_return_value PARAMS ((struct type *, char *, char *)); | |
298 | ||
299 | ||
300 | #define REGISTER_SIZE 2 | |
301 | ||
302 | #ifdef CC_HAS_LONG_LONG | |
303 | # define LONGEST long long | |
304 | #else | |
305 | # define LONGEST long | |
306 | #endif | |
307 | #define ULONGEST unsigned LONGEST | |
308 | ||
309 | void d10v_write_pc PARAMS ((CORE_ADDR val, int pid)); | |
310 | CORE_ADDR d10v_read_pc PARAMS ((int pid)); | |
311 | void d10v_write_sp PARAMS ((CORE_ADDR val)); | |
312 | CORE_ADDR d10v_read_sp PARAMS ((void)); | |
313 | void d10v_write_fp PARAMS ((CORE_ADDR val)); | |
314 | CORE_ADDR d10v_read_fp PARAMS ((void)); | |
315 | ||
316 | #define TARGET_READ_PC(pid) d10v_read_pc (pid) | |
317 | #define TARGET_WRITE_PC(val,pid) d10v_write_pc (val, pid) | |
318 | #define TARGET_READ_FP() d10v_read_fp () | |
319 | #define TARGET_WRITE_FP(val) d10v_write_fp (val) | |
320 | #define TARGET_READ_SP() d10v_read_sp () | |
321 | #define TARGET_WRITE_SP(val) d10v_write_sp (val) | |
322 | ||
323 | /* Number of bits in the appropriate type */ | |
324 | #define TARGET_INT_BIT (2 * TARGET_CHAR_BIT) | |
325 | #define TARGET_PTR_BIT (4 * TARGET_CHAR_BIT) | |
326 | #define TARGET_DOUBLE_BIT (4 * TARGET_CHAR_BIT) | |
327 | #define TARGET_LONG_DOUBLE_BIT (8 * TARGET_CHAR_BIT) | |
328 | ||
329 | \f | |
330 | /* For the d10v when talking to the remote d10v board, GDB addresses | |
331 | need to be translated into a format that the d10v rom monitor | |
332 | understands. */ | |
333 | ||
334 | int remote_d10v_translate_xfer_address PARAMS ((CORE_ADDR gdb_addr, int gdb_len, CORE_ADDR *rem_addr)); | |
335 | #define REMOTE_TRANSLATE_XFER_ADDRESS(GDB_ADDR, GDB_LEN, REM_ADDR, REM_LEN) \ | |
336 | (REM_LEN) = remote_d10v_translate_xfer_address ((GDB_ADDR), (GDB_LEN), &(REM_ADDR)) | |
337 |