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49d45b20 JB |
1 | /* Target-dependent code for FT32. |
2 | ||
42a4f53d | 3 | Copyright (C) 2009-2019 Free Software Foundation, Inc. |
49d45b20 JB |
4 | |
5 | This file is part of GDB. | |
6 | ||
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 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
d55e5aa6 TT |
21 | |
22 | /* Standard C++ includes. */ | |
23 | #include <algorithm> | |
24 | ||
25 | /* Local non-gdb includes. */ | |
26 | #include "arch-utils.h" | |
27 | #include "dis-asm.h" | |
49d45b20 | 28 | #include "frame-base.h" |
d55e5aa6 TT |
29 | #include "frame-unwind.h" |
30 | #include "frame.h" | |
31 | #include "ft32-tdep.h" | |
32 | #include "gdb/sim-ft32.h" | |
49d45b20 JB |
33 | #include "gdbcmd.h" |
34 | #include "gdbcore.h" | |
d55e5aa6 | 35 | #include "gdbtypes.h" |
49d45b20 | 36 | #include "inferior.h" |
d55e5aa6 | 37 | #include "language.h" |
49d45b20 | 38 | #include "objfiles.h" |
d55e5aa6 | 39 | #include "opcode/ft32.h" |
49d45b20 | 40 | #include "osabi.h" |
d55e5aa6 | 41 | #include "record.h" |
49d45b20 | 42 | #include "regcache.h" |
d55e5aa6 TT |
43 | #include "symfile.h" |
44 | #include "symtab.h" | |
49d45b20 | 45 | #include "trad-frame.h" |
d55e5aa6 | 46 | #include "value.h" |
49d45b20 JB |
47 | |
48 | #define RAM_BIAS 0x800000 /* Bias added to RAM addresses. */ | |
49 | ||
49d45b20 JB |
50 | /* Use an invalid address -1 as 'not available' marker. */ |
51 | enum { REG_UNAVAIL = (CORE_ADDR) (-1) }; | |
52 | ||
53 | struct ft32_frame_cache | |
54 | { | |
55 | /* Base address of the frame */ | |
56 | CORE_ADDR base; | |
57 | /* Function this frame belongs to */ | |
58 | CORE_ADDR pc; | |
59 | /* Total size of this frame */ | |
60 | LONGEST framesize; | |
61 | /* Saved registers in this frame */ | |
62 | CORE_ADDR saved_regs[FT32_NUM_REGS]; | |
63 | /* Saved SP in this frame */ | |
64 | CORE_ADDR saved_sp; | |
65 | /* Has the new frame been LINKed. */ | |
66 | bfd_boolean established; | |
67 | }; | |
68 | ||
69 | /* Implement the "frame_align" gdbarch method. */ | |
70 | ||
71 | static CORE_ADDR | |
72 | ft32_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp) | |
73 | { | |
74 | /* Align to the size of an instruction (so that they can safely be | |
75 | pushed onto the stack. */ | |
76 | return sp & ~1; | |
77 | } | |
78 | ||
49d45b20 | 79 | |
04180708 | 80 | constexpr gdb_byte ft32_break_insn[] = { 0x02, 0x00, 0x34, 0x00 }; |
49d45b20 | 81 | |
04180708 | 82 | typedef BP_MANIPULATION (ft32_break_insn) ft32_breakpoint; |
49d45b20 JB |
83 | |
84 | /* FT32 register names. */ | |
85 | ||
86 | static const char *const ft32_register_names[] = | |
87 | { | |
88 | "fp", "sp", | |
89 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
90 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
91 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
92 | "r24", "r25", "r26", "r27", "r28", "cc", | |
93 | "pc" | |
94 | }; | |
95 | ||
96 | /* Implement the "register_name" gdbarch method. */ | |
97 | ||
98 | static const char * | |
99 | ft32_register_name (struct gdbarch *gdbarch, int reg_nr) | |
100 | { | |
101 | if (reg_nr < 0) | |
102 | return NULL; | |
103 | if (reg_nr >= FT32_NUM_REGS) | |
104 | return NULL; | |
105 | return ft32_register_names[reg_nr]; | |
106 | } | |
107 | ||
108 | /* Implement the "register_type" gdbarch method. */ | |
109 | ||
110 | static struct type * | |
111 | ft32_register_type (struct gdbarch *gdbarch, int reg_nr) | |
112 | { | |
113 | if (reg_nr == FT32_PC_REGNUM) | |
623fb775 | 114 | return gdbarch_tdep (gdbarch)->pc_type; |
49d45b20 JB |
115 | else if (reg_nr == FT32_SP_REGNUM || reg_nr == FT32_FP_REGNUM) |
116 | return builtin_type (gdbarch)->builtin_data_ptr; | |
117 | else | |
118 | return builtin_type (gdbarch)->builtin_int32; | |
119 | } | |
120 | ||
121 | /* Write into appropriate registers a function return value | |
122 | of type TYPE, given in virtual format. */ | |
123 | ||
124 | static void | |
125 | ft32_store_return_value (struct type *type, struct regcache *regcache, | |
126 | const gdb_byte *valbuf) | |
127 | { | |
ac7936df | 128 | struct gdbarch *gdbarch = regcache->arch (); |
49d45b20 JB |
129 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
130 | CORE_ADDR regval; | |
131 | int len = TYPE_LENGTH (type); | |
132 | ||
133 | /* Things always get returned in RET1_REGNUM, RET2_REGNUM. */ | |
134 | regval = extract_unsigned_integer (valbuf, len > 4 ? 4 : len, byte_order); | |
135 | regcache_cooked_write_unsigned (regcache, FT32_R0_REGNUM, regval); | |
136 | if (len > 4) | |
137 | { | |
138 | regval = extract_unsigned_integer (valbuf + 4, | |
139 | len - 4, byte_order); | |
140 | regcache_cooked_write_unsigned (regcache, FT32_R1_REGNUM, regval); | |
141 | } | |
142 | } | |
143 | ||
dcc31d28 JB |
144 | /* Fetch a single 32-bit instruction from address a. If memory contains |
145 | a compressed instruction pair, return the expanded instruction. */ | |
146 | ||
147 | static ULONGEST | |
148 | ft32_fetch_instruction (CORE_ADDR a, int *isize, | |
149 | enum bfd_endian byte_order) | |
150 | { | |
151 | unsigned int sc[2]; | |
152 | ULONGEST inst; | |
153 | ||
154 | CORE_ADDR a4 = a & ~3; | |
155 | inst = read_code_unsigned_integer (a4, 4, byte_order); | |
156 | *isize = ft32_decode_shortcode (a4, inst, sc) ? 2 : 4; | |
157 | if (*isize == 2) | |
158 | return sc[1 & (a >> 1)]; | |
159 | else | |
160 | return inst; | |
161 | } | |
162 | ||
49d45b20 JB |
163 | /* Decode the instructions within the given address range. Decide |
164 | when we must have reached the end of the function prologue. If a | |
165 | frame_info pointer is provided, fill in its saved_regs etc. | |
166 | ||
167 | Returns the address of the first instruction after the prologue. */ | |
168 | ||
49d45b20 JB |
169 | static CORE_ADDR |
170 | ft32_analyze_prologue (CORE_ADDR start_addr, CORE_ADDR end_addr, | |
171 | struct ft32_frame_cache *cache, | |
172 | struct gdbarch *gdbarch) | |
173 | { | |
174 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
175 | CORE_ADDR next_addr; | |
870f88f7 | 176 | ULONGEST inst; |
dcc31d28 | 177 | int isize = 0; |
ae4e2501 | 178 | int regnum, pushreg; |
179 | struct bound_minimal_symbol msymbol; | |
180 | const int first_saved_reg = 13; /* The first saved register. */ | |
181 | /* PROLOGS are addresses of the subroutine prologs, PROLOGS[n] | |
182 | is the address of __prolog_$rN. | |
183 | __prolog_$rN pushes registers from 13 through n inclusive. | |
184 | So for example CALL __prolog_$r15 is equivalent to: | |
185 | PUSH $r13 | |
186 | PUSH $r14 | |
187 | PUSH $r15 | |
188 | Note that PROLOGS[0] through PROLOGS[12] are unused. */ | |
189 | CORE_ADDR prologs[32]; | |
49d45b20 JB |
190 | |
191 | cache->saved_regs[FT32_PC_REGNUM] = 0; | |
192 | cache->framesize = 0; | |
193 | ||
ae4e2501 | 194 | for (regnum = first_saved_reg; regnum < 32; regnum++) |
195 | { | |
196 | char prolog_symbol[32]; | |
197 | ||
198 | snprintf (prolog_symbol, sizeof (prolog_symbol), "__prolog_$r%02d", | |
199 | regnum); | |
200 | msymbol = lookup_minimal_symbol (prolog_symbol, NULL, NULL); | |
201 | if (msymbol.minsym) | |
202 | prologs[regnum] = BMSYMBOL_VALUE_ADDRESS (msymbol); | |
203 | else | |
204 | prologs[regnum] = 0; | |
205 | } | |
206 | ||
49d45b20 | 207 | if (start_addr >= end_addr) |
ae4e2501 | 208 | return end_addr; |
49d45b20 JB |
209 | |
210 | cache->established = 0; | |
dcc31d28 | 211 | for (next_addr = start_addr; next_addr < end_addr; next_addr += isize) |
49d45b20 | 212 | { |
dcc31d28 | 213 | inst = ft32_fetch_instruction (next_addr, &isize, byte_order); |
49d45b20 | 214 | |
86feccb9 | 215 | if (FT32_IS_PUSH (inst)) |
49d45b20 | 216 | { |
ae4e2501 | 217 | pushreg = FT32_PUSH_REG (inst); |
49d45b20 | 218 | cache->framesize += 4; |
ae4e2501 | 219 | cache->saved_regs[FT32_R0_REGNUM + pushreg] = cache->framesize; |
49d45b20 | 220 | } |
ae4e2501 | 221 | else if (FT32_IS_CALL (inst)) |
222 | { | |
223 | for (regnum = first_saved_reg; regnum < 32; regnum++) | |
224 | { | |
225 | if ((4 * (inst & 0x3ffff)) == prologs[regnum]) | |
226 | { | |
227 | for (pushreg = first_saved_reg; pushreg <= regnum; | |
228 | pushreg++) | |
229 | { | |
230 | cache->framesize += 4; | |
231 | cache->saved_regs[FT32_R0_REGNUM + pushreg] = | |
232 | cache->framesize; | |
233 | } | |
ae4e2501 | 234 | } |
235 | } | |
236 | break; | |
237 | } | |
49d45b20 JB |
238 | else |
239 | break; | |
240 | } | |
241 | for (regnum = FT32_R0_REGNUM; regnum < FT32_PC_REGNUM; regnum++) | |
242 | { | |
243 | if (cache->saved_regs[regnum] != REG_UNAVAIL) | |
ae4e2501 | 244 | cache->saved_regs[regnum] = |
245 | cache->framesize - cache->saved_regs[regnum]; | |
49d45b20 JB |
246 | } |
247 | cache->saved_regs[FT32_PC_REGNUM] = cache->framesize; | |
248 | ||
249 | /* It is a LINK? */ | |
250 | if (next_addr < end_addr) | |
251 | { | |
dcc31d28 | 252 | inst = ft32_fetch_instruction (next_addr, &isize, byte_order); |
86feccb9 | 253 | if (FT32_IS_LINK (inst)) |
49d45b20 JB |
254 | { |
255 | cache->established = 1; | |
256 | for (regnum = FT32_R0_REGNUM; regnum < FT32_PC_REGNUM; regnum++) | |
257 | { | |
258 | if (cache->saved_regs[regnum] != REG_UNAVAIL) | |
259 | cache->saved_regs[regnum] += 4; | |
260 | } | |
261 | cache->saved_regs[FT32_PC_REGNUM] = cache->framesize + 4; | |
262 | cache->saved_regs[FT32_FP_REGNUM] = 0; | |
86feccb9 | 263 | cache->framesize += FT32_LINK_SIZE (inst); |
dcc31d28 | 264 | next_addr += isize; |
49d45b20 JB |
265 | } |
266 | } | |
267 | ||
268 | return next_addr; | |
269 | } | |
270 | ||
271 | /* Find the end of function prologue. */ | |
272 | ||
273 | static CORE_ADDR | |
274 | ft32_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) | |
275 | { | |
276 | CORE_ADDR func_addr = 0, func_end = 0; | |
277 | const char *func_name; | |
278 | ||
279 | /* See if we can determine the end of the prologue via the symbol table. | |
280 | If so, then return either PC, or the PC after the prologue, whichever | |
281 | is greater. */ | |
282 | if (find_pc_partial_function (pc, &func_name, &func_addr, &func_end)) | |
283 | { | |
284 | CORE_ADDR post_prologue_pc | |
285 | = skip_prologue_using_sal (gdbarch, func_addr); | |
286 | if (post_prologue_pc != 0) | |
325fac50 | 287 | return std::max (pc, post_prologue_pc); |
49d45b20 JB |
288 | else |
289 | { | |
290 | /* Can't determine prologue from the symbol table, need to examine | |
291 | instructions. */ | |
292 | struct symtab_and_line sal; | |
293 | struct symbol *sym; | |
294 | struct ft32_frame_cache cache; | |
295 | CORE_ADDR plg_end; | |
296 | ||
297 | memset (&cache, 0, sizeof cache); | |
298 | ||
299 | plg_end = ft32_analyze_prologue (func_addr, | |
300 | func_end, &cache, gdbarch); | |
301 | /* Found a function. */ | |
835a09d9 | 302 | sym = lookup_symbol (func_name, NULL, VAR_DOMAIN, NULL).symbol; |
49d45b20 JB |
303 | /* Don't use line number debug info for assembly source files. */ |
304 | if ((sym != NULL) && SYMBOL_LANGUAGE (sym) != language_asm) | |
305 | { | |
306 | sal = find_pc_line (func_addr, 0); | |
307 | if (sal.end && sal.end < func_end) | |
308 | { | |
309 | /* Found a line number, use it as end of prologue. */ | |
310 | return sal.end; | |
311 | } | |
312 | } | |
313 | /* No useable line symbol. Use result of prologue parsing method. */ | |
314 | return plg_end; | |
315 | } | |
316 | } | |
317 | ||
318 | /* No function symbol -- just return the PC. */ | |
319 | return pc; | |
320 | } | |
321 | ||
623fb775 | 322 | /* Implementation of `pointer_to_address' gdbarch method. |
323 | ||
324 | On FT32 address space zero is RAM, address space 1 is flash. | |
325 | RAM appears at address RAM_BIAS, flash at address 0. */ | |
326 | ||
327 | static CORE_ADDR | |
328 | ft32_pointer_to_address (struct gdbarch *gdbarch, | |
329 | struct type *type, const gdb_byte *buf) | |
330 | { | |
331 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
332 | CORE_ADDR addr | |
333 | = extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order); | |
334 | ||
335 | if (TYPE_ADDRESS_CLASS_1 (type)) | |
336 | return addr; | |
337 | else | |
338 | return addr | RAM_BIAS; | |
339 | } | |
340 | ||
341 | /* Implementation of `address_class_type_flags' gdbarch method. | |
342 | ||
343 | This method maps DW_AT_address_class attributes to a | |
344 | type_instance_flag_value. */ | |
345 | ||
346 | static int | |
347 | ft32_address_class_type_flags (int byte_size, int dwarf2_addr_class) | |
348 | { | |
349 | /* The value 1 of the DW_AT_address_class attribute corresponds to the | |
350 | __flash__ qualifier, meaning pointer to data in FT32 program memory. | |
351 | */ | |
352 | if (dwarf2_addr_class == 1) | |
353 | return TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1; | |
354 | return 0; | |
355 | } | |
356 | ||
357 | /* Implementation of `address_class_type_flags_to_name' gdbarch method. | |
358 | ||
359 | Convert a type_instance_flag_value to an address space qualifier. */ | |
360 | ||
361 | static const char* | |
362 | ft32_address_class_type_flags_to_name (struct gdbarch *gdbarch, int type_flags) | |
363 | { | |
364 | if (type_flags & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1) | |
365 | return "flash"; | |
366 | else | |
367 | return NULL; | |
368 | } | |
369 | ||
370 | /* Implementation of `address_class_name_to_type_flags' gdbarch method. | |
371 | ||
372 | Convert an address space qualifier to a type_instance_flag_value. */ | |
373 | ||
374 | static int | |
375 | ft32_address_class_name_to_type_flags (struct gdbarch *gdbarch, | |
376 | const char* name, | |
377 | int *type_flags_ptr) | |
378 | { | |
379 | if (strcmp (name, "flash") == 0) | |
380 | { | |
381 | *type_flags_ptr = TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1; | |
382 | return 1; | |
383 | } | |
384 | else | |
385 | return 0; | |
386 | } | |
387 | ||
49d45b20 JB |
388 | /* Given a return value in `regbuf' with a type `valtype', |
389 | extract and copy its value into `valbuf'. */ | |
390 | ||
391 | static void | |
392 | ft32_extract_return_value (struct type *type, struct regcache *regcache, | |
393 | gdb_byte *dst) | |
394 | { | |
ac7936df | 395 | struct gdbarch *gdbarch = regcache->arch (); |
49d45b20 JB |
396 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
397 | bfd_byte *valbuf = dst; | |
398 | int len = TYPE_LENGTH (type); | |
399 | ULONGEST tmp; | |
400 | ||
401 | /* By using store_unsigned_integer we avoid having to do | |
402 | anything special for small big-endian values. */ | |
403 | regcache_cooked_read_unsigned (regcache, FT32_R0_REGNUM, &tmp); | |
404 | store_unsigned_integer (valbuf, (len > 4 ? len - 4 : len), byte_order, tmp); | |
405 | ||
406 | /* Ignore return values more than 8 bytes in size because the ft32 | |
407 | returns anything more than 8 bytes in the stack. */ | |
408 | if (len > 4) | |
409 | { | |
410 | regcache_cooked_read_unsigned (regcache, FT32_R1_REGNUM, &tmp); | |
411 | store_unsigned_integer (valbuf + len - 4, 4, byte_order, tmp); | |
412 | } | |
413 | } | |
414 | ||
415 | /* Implement the "return_value" gdbarch method. */ | |
416 | ||
417 | static enum return_value_convention | |
418 | ft32_return_value (struct gdbarch *gdbarch, struct value *function, | |
419 | struct type *valtype, struct regcache *regcache, | |
420 | gdb_byte *readbuf, const gdb_byte *writebuf) | |
421 | { | |
422 | if (TYPE_LENGTH (valtype) > 8) | |
423 | return RETURN_VALUE_STRUCT_CONVENTION; | |
424 | else | |
425 | { | |
426 | if (readbuf != NULL) | |
427 | ft32_extract_return_value (valtype, regcache, readbuf); | |
428 | if (writebuf != NULL) | |
429 | ft32_store_return_value (valtype, regcache, writebuf); | |
430 | return RETURN_VALUE_REGISTER_CONVENTION; | |
431 | } | |
432 | } | |
433 | ||
434 | /* Allocate and initialize a ft32_frame_cache object. */ | |
435 | ||
436 | static struct ft32_frame_cache * | |
437 | ft32_alloc_frame_cache (void) | |
438 | { | |
439 | struct ft32_frame_cache *cache; | |
440 | int i; | |
441 | ||
442 | cache = FRAME_OBSTACK_ZALLOC (struct ft32_frame_cache); | |
443 | ||
444 | for (i = 0; i < FT32_NUM_REGS; ++i) | |
445 | cache->saved_regs[i] = REG_UNAVAIL; | |
446 | ||
447 | return cache; | |
448 | } | |
449 | ||
450 | /* Populate a ft32_frame_cache object for this_frame. */ | |
451 | ||
452 | static struct ft32_frame_cache * | |
453 | ft32_frame_cache (struct frame_info *this_frame, void **this_cache) | |
454 | { | |
455 | struct ft32_frame_cache *cache; | |
456 | CORE_ADDR current_pc; | |
457 | int i; | |
458 | ||
459 | if (*this_cache) | |
9a3c8263 | 460 | return (struct ft32_frame_cache *) *this_cache; |
49d45b20 JB |
461 | |
462 | cache = ft32_alloc_frame_cache (); | |
463 | *this_cache = cache; | |
464 | ||
465 | cache->base = get_frame_register_unsigned (this_frame, FT32_FP_REGNUM); | |
466 | if (cache->base == 0) | |
467 | return cache; | |
468 | ||
469 | cache->pc = get_frame_func (this_frame); | |
470 | current_pc = get_frame_pc (this_frame); | |
471 | if (cache->pc) | |
472 | { | |
473 | struct gdbarch *gdbarch = get_frame_arch (this_frame); | |
474 | ||
475 | ft32_analyze_prologue (cache->pc, current_pc, cache, gdbarch); | |
476 | if (!cache->established) | |
477 | cache->base = get_frame_register_unsigned (this_frame, FT32_SP_REGNUM); | |
478 | } | |
479 | ||
480 | cache->saved_sp = cache->base - 4; | |
481 | ||
482 | for (i = 0; i < FT32_NUM_REGS; ++i) | |
483 | if (cache->saved_regs[i] != REG_UNAVAIL) | |
484 | cache->saved_regs[i] = cache->base + cache->saved_regs[i]; | |
485 | ||
486 | return cache; | |
487 | } | |
488 | ||
49d45b20 JB |
489 | /* Given a GDB frame, determine the address of the calling function's |
490 | frame. This will be used to create a new GDB frame struct. */ | |
491 | ||
492 | static void | |
493 | ft32_frame_this_id (struct frame_info *this_frame, | |
494 | void **this_prologue_cache, struct frame_id *this_id) | |
495 | { | |
496 | struct ft32_frame_cache *cache = ft32_frame_cache (this_frame, | |
497 | this_prologue_cache); | |
498 | ||
499 | /* This marks the outermost frame. */ | |
500 | if (cache->base == 0) | |
501 | return; | |
502 | ||
503 | *this_id = frame_id_build (cache->saved_sp, cache->pc); | |
504 | } | |
505 | ||
506 | /* Get the value of register regnum in the previous stack frame. */ | |
507 | ||
508 | static struct value * | |
509 | ft32_frame_prev_register (struct frame_info *this_frame, | |
510 | void **this_prologue_cache, int regnum) | |
511 | { | |
512 | struct ft32_frame_cache *cache = ft32_frame_cache (this_frame, | |
513 | this_prologue_cache); | |
514 | ||
515 | gdb_assert (regnum >= 0); | |
516 | ||
517 | if (regnum == FT32_SP_REGNUM && cache->saved_sp) | |
518 | return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp); | |
519 | ||
520 | if (regnum < FT32_NUM_REGS && cache->saved_regs[regnum] != REG_UNAVAIL) | |
521 | return frame_unwind_got_memory (this_frame, regnum, | |
522 | RAM_BIAS | cache->saved_regs[regnum]); | |
523 | ||
524 | return frame_unwind_got_register (this_frame, regnum, regnum); | |
525 | } | |
526 | ||
527 | static const struct frame_unwind ft32_frame_unwind = | |
528 | { | |
529 | NORMAL_FRAME, | |
530 | default_frame_unwind_stop_reason, | |
531 | ft32_frame_this_id, | |
532 | ft32_frame_prev_register, | |
533 | NULL, | |
534 | default_frame_sniffer | |
535 | }; | |
536 | ||
537 | /* Return the base address of this_frame. */ | |
538 | ||
539 | static CORE_ADDR | |
540 | ft32_frame_base_address (struct frame_info *this_frame, void **this_cache) | |
541 | { | |
542 | struct ft32_frame_cache *cache = ft32_frame_cache (this_frame, | |
543 | this_cache); | |
544 | ||
545 | return cache->base; | |
546 | } | |
547 | ||
548 | static const struct frame_base ft32_frame_base = | |
549 | { | |
550 | &ft32_frame_unwind, | |
551 | ft32_frame_base_address, | |
552 | ft32_frame_base_address, | |
553 | ft32_frame_base_address | |
554 | }; | |
555 | ||
49d45b20 JB |
556 | /* Allocate and initialize the ft32 gdbarch object. */ |
557 | ||
558 | static struct gdbarch * | |
559 | ft32_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
560 | { | |
561 | struct gdbarch *gdbarch; | |
562 | struct gdbarch_tdep *tdep; | |
623fb775 | 563 | struct type *void_type; |
564 | struct type *func_void_type; | |
49d45b20 JB |
565 | |
566 | /* If there is already a candidate, use it. */ | |
567 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
568 | if (arches != NULL) | |
569 | return arches->gdbarch; | |
570 | ||
571 | /* Allocate space for the new architecture. */ | |
cdd238da | 572 | tdep = XCNEW (struct gdbarch_tdep); |
49d45b20 JB |
573 | gdbarch = gdbarch_alloc (&info, tdep); |
574 | ||
623fb775 | 575 | /* Create a type for PC. We can't use builtin types here, as they may not |
576 | be defined. */ | |
77b7c781 | 577 | void_type = arch_type (gdbarch, TYPE_CODE_VOID, TARGET_CHAR_BIT, "void"); |
623fb775 | 578 | func_void_type = make_function_type (void_type, NULL); |
88dfca6c UW |
579 | tdep->pc_type = arch_pointer_type (gdbarch, 4 * TARGET_CHAR_BIT, NULL, |
580 | func_void_type); | |
623fb775 | 581 | TYPE_INSTANCE_FLAGS (tdep->pc_type) |= TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1; |
582 | ||
49d45b20 JB |
583 | set_gdbarch_num_regs (gdbarch, FT32_NUM_REGS); |
584 | set_gdbarch_sp_regnum (gdbarch, FT32_SP_REGNUM); | |
585 | set_gdbarch_pc_regnum (gdbarch, FT32_PC_REGNUM); | |
586 | set_gdbarch_register_name (gdbarch, ft32_register_name); | |
587 | set_gdbarch_register_type (gdbarch, ft32_register_type); | |
588 | ||
589 | set_gdbarch_return_value (gdbarch, ft32_return_value); | |
590 | ||
623fb775 | 591 | set_gdbarch_pointer_to_address (gdbarch, ft32_pointer_to_address); |
592 | ||
49d45b20 JB |
593 | set_gdbarch_skip_prologue (gdbarch, ft32_skip_prologue); |
594 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); | |
04180708 YQ |
595 | set_gdbarch_breakpoint_kind_from_pc (gdbarch, ft32_breakpoint::kind_from_pc); |
596 | set_gdbarch_sw_breakpoint_from_kind (gdbarch, ft32_breakpoint::bp_from_kind); | |
49d45b20 JB |
597 | set_gdbarch_frame_align (gdbarch, ft32_frame_align); |
598 | ||
599 | frame_base_set_default (gdbarch, &ft32_frame_base); | |
600 | ||
49d45b20 JB |
601 | /* Hook in ABI-specific overrides, if they have been registered. */ |
602 | gdbarch_init_osabi (info, gdbarch); | |
603 | ||
604 | /* Hook in the default unwinders. */ | |
605 | frame_unwind_append_unwinder (gdbarch, &ft32_frame_unwind); | |
606 | ||
607 | /* Support simple overlay manager. */ | |
608 | set_gdbarch_overlay_update (gdbarch, simple_overlay_update); | |
609 | ||
623fb775 | 610 | set_gdbarch_address_class_type_flags (gdbarch, ft32_address_class_type_flags); |
611 | set_gdbarch_address_class_name_to_type_flags | |
612 | (gdbarch, ft32_address_class_name_to_type_flags); | |
613 | set_gdbarch_address_class_type_flags_to_name | |
614 | (gdbarch, ft32_address_class_type_flags_to_name); | |
615 | ||
49d45b20 JB |
616 | return gdbarch; |
617 | } | |
618 | ||
619 | /* Register this machine's init routine. */ | |
620 | ||
621 | void | |
622 | _initialize_ft32_tdep (void) | |
623 | { | |
624 | register_gdbarch_init (bfd_arch_ft32, ft32_gdbarch_init); | |
625 | } |