1 /* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.
3 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free
4 Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
25 To get from 1.1 to 1.2, add:
29 extract_struct_value_address
31 Make sure to use regcache. */
35 Apparently cannot run without a stub placeholder for unwind_dummy_id.
40 To get from 1.2 to 1.3, add:
43 struct mn10300_unwind_cache
48 frame_sniffer (struct mn10300_frame_unwind)
52 #include "arch-utils.h"
56 #include "gdb_string.h"
57 #include "gdb_assert.h"
59 #include "frame-unwind.h"
60 #include "frame-base.h"
61 #include "trad-frame.h"
63 #include "dwarf2-frame.h"
66 #include "mn10300-tdep.h"
69 /* Compute the alignment required by a type. */
72 mn10300_type_align (struct type
*type
)
76 switch (TYPE_CODE (type
))
87 return TYPE_LENGTH (type
);
89 case TYPE_CODE_COMPLEX
:
90 return TYPE_LENGTH (type
) / 2;
92 case TYPE_CODE_STRUCT
:
94 for (i
= 0; i
< TYPE_NFIELDS (type
); i
++)
96 int falign
= mn10300_type_align (TYPE_FIELD_TYPE (type
, i
));
97 while (align
< falign
)
102 case TYPE_CODE_ARRAY
:
103 /* HACK! Structures containing arrays, even small ones, are not
104 elligible for returning in registers. */
107 case TYPE_CODE_TYPEDEF
:
108 return mn10300_type_align (check_typedef (type
));
111 internal_error (__FILE__
, __LINE__
, _("bad switch"));
115 /* MVS note this is deprecated. */
116 /* Should call_function allocate stack space for a struct return? */
119 mn10300_use_struct_convention (int gcc_p
, struct type
*type
)
121 /* Structures bigger than a pair of words can't be returned in
123 if (TYPE_LENGTH (type
) > 8)
126 switch (TYPE_CODE (type
))
128 case TYPE_CODE_STRUCT
:
129 case TYPE_CODE_UNION
:
130 /* Structures with a single field are handled as the field
132 if (TYPE_NFIELDS (type
) == 1)
133 return mn10300_use_struct_convention (gcc_p
,
134 TYPE_FIELD_TYPE (type
, 0));
136 /* Structures with word or double-word size are passed in memory, as
137 long as they require at least word alignment. */
138 if (mn10300_type_align (type
) >= 4)
143 /* Arrays are addressable, so they're never returned in
144 registers. This condition can only hold when the array is
145 the only field of a struct or union. */
146 case TYPE_CODE_ARRAY
:
149 case TYPE_CODE_TYPEDEF
:
150 return mn10300_use_struct_convention (gcc_p
, check_typedef (type
));
157 /* MVS note this is deprecated. */
159 mn10300_store_return_value (struct type
*type
,
160 struct regcache
*regcache
, const void *valbuf
)
162 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
163 int len
= TYPE_LENGTH (type
);
166 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
171 regsz
= register_size (gdbarch
, reg
);
174 regcache_raw_write_part (regcache
, reg
, 0, len
, valbuf
);
175 else if (len
<= 2 * regsz
)
177 regcache_raw_write (regcache
, reg
, valbuf
);
178 gdb_assert (regsz
== register_size (gdbarch
, reg
+ 1));
179 regcache_raw_write_part (regcache
, reg
+1, 0,
180 len
- regsz
, (char *) valbuf
+ regsz
);
183 internal_error (__FILE__
, __LINE__
,
184 _("Cannot store return value %d bytes long."), len
);
187 /* MVS note deprecated. */
189 mn10300_extract_return_value (struct type
*type
,
190 struct regcache
*regcache
, void *valbuf
)
192 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
193 char buf
[MAX_REGISTER_SIZE
];
194 int len
= TYPE_LENGTH (type
);
197 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
202 regsz
= register_size (gdbarch
, reg
);
205 regcache_raw_read (regcache
, reg
, buf
);
206 memcpy (valbuf
, buf
, len
);
208 else if (len
<= 2 * regsz
)
210 regcache_raw_read (regcache
, reg
, buf
);
211 memcpy (valbuf
, buf
, regsz
);
212 gdb_assert (regsz
== register_size (gdbarch
, reg
+ 1));
213 regcache_raw_read (regcache
, reg
+ 1, buf
);
214 memcpy ((char *) valbuf
+ regsz
, buf
, len
- regsz
);
217 internal_error (__FILE__
, __LINE__
,
218 _("Cannot extract return value %d bytes long."), len
);
222 register_name (int reg
, char **regs
, long sizeof_regs
)
224 if (reg
< 0 || reg
>= sizeof_regs
/ sizeof (regs
[0]))
231 mn10300_generic_register_name (int reg
)
233 static char *regs
[] =
234 { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",
235 "sp", "pc", "mdr", "psw", "lir", "lar", "", "",
236 "", "", "", "", "", "", "", "",
237 "", "", "", "", "", "", "", "fp"
239 return register_name (reg
, regs
, sizeof regs
);
244 am33_register_name (int reg
)
246 static char *regs
[] =
247 { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",
248 "sp", "pc", "mdr", "psw", "lir", "lar", "",
249 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
250 "ssp", "msp", "usp", "mcrh", "mcrl", "mcvf", "", "", ""
252 return register_name (reg
, regs
, sizeof regs
);
257 mn10300_register_type (struct gdbarch
*gdbarch
, int reg
)
259 return builtin_type_int
;
263 mn10300_read_pc (ptid_t ptid
)
265 return read_register_pid (E_PC_REGNUM
, ptid
);
269 mn10300_write_pc (CORE_ADDR val
, ptid_t ptid
)
271 return write_register_pid (E_PC_REGNUM
, val
, ptid
);
274 /* The breakpoint instruction must be the same size as the smallest
275 instruction in the instruction set.
277 The Matsushita mn10x00 processors have single byte instructions
278 so we need a single byte breakpoint. Matsushita hasn't defined
279 one, so we defined it ourselves. */
281 const static unsigned char *
282 mn10300_breakpoint_from_pc (CORE_ADDR
*bp_addr
, int *bp_size
)
284 static char breakpoint
[] = {0xff};
289 /* Function: skip_prologue
290 Return the address of the first inst past the prologue of the function. */
293 mn10300_skip_prologue (CORE_ADDR pc
)
295 /* FIXME: not implemented. */
296 /* First approximation, try simply using skip_prologue_using_sal. */
297 return skip_prologue_using_sal (pc
);
300 /* Simple frame_unwind_cache.
301 This finds the "extra info" for the frame. */
302 struct trad_frame_cache
*
303 mn10300_frame_unwind_cache (struct frame_info
*next_frame
,
304 void **this_prologue_cache
)
306 struct trad_frame_cache
*cache
;
309 if (*this_prologue_cache
)
310 return (*this_prologue_cache
);
312 cache
= trad_frame_cache_zalloc (next_frame
);
313 pc
= gdbarch_unwind_pc (current_gdbarch
, next_frame
);
314 mn10300_analyze_prologue (next_frame
, &cache
, pc
);
316 trad_frame_set_id (cache
,
317 frame_id_build (trad_frame_get_this_base (cache
), pc
));
319 (*this_prologue_cache
) = cache
;
323 /* Here is a dummy implementation. */
324 static struct frame_id
325 mn10300_dummy_unwind_dummy_id (struct gdbarch
*gdbarch
,
326 struct frame_info
*next_frame
)
328 return frame_id_build (0, 0);
331 /* Trad frame implementation. */
333 mn10300_frame_this_id (struct frame_info
*next_frame
,
334 void **this_prologue_cache
,
335 struct frame_id
*this_id
)
337 struct trad_frame_cache
*cache
=
338 mn10300_frame_unwind_cache (next_frame
, this_prologue_cache
);
340 trad_frame_get_id (cache
, this_id
);
344 mn10300_frame_prev_register (struct frame_info
*next_frame
,
345 void **this_prologue_cache
,
346 int regnum
, int *optimizedp
,
347 enum lval_type
*lvalp
, CORE_ADDR
*addrp
,
348 int *realnump
, void *bufferp
)
350 struct trad_frame_cache
*cache
=
351 mn10300_frame_unwind_cache (next_frame
, this_prologue_cache
);
353 trad_frame_get_register (cache
, next_frame
, regnum
, optimizedp
,
354 lvalp
, addrp
, realnump
, bufferp
);
356 trad_frame_get_prev_register (next_frame, cache->prev_regs, regnum,
357 optimizedp, lvalp, addrp, realnump, bufferp);
361 static const struct frame_unwind mn10300_frame_unwind
= {
363 mn10300_frame_this_id
,
364 mn10300_frame_prev_register
368 mn10300_frame_base_address (struct frame_info
*next_frame
,
369 void **this_prologue_cache
)
371 struct trad_frame_cache
*cache
=
372 mn10300_frame_unwind_cache (next_frame
, this_prologue_cache
);
374 return trad_frame_get_this_base (cache
);
377 static const struct frame_unwind
*
378 mn10300_frame_sniffer (struct frame_info
*next_frame
)
380 return &mn10300_frame_unwind
;
383 static const struct frame_base mn10300_frame_base
= {
384 &mn10300_frame_unwind
,
385 mn10300_frame_base_address
,
386 mn10300_frame_base_address
,
387 mn10300_frame_base_address
391 mn10300_unwind_pc (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
395 frame_unwind_unsigned_register (next_frame
, E_PC_REGNUM
, &pc
);
400 mn10300_unwind_sp (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
404 frame_unwind_unsigned_register (next_frame
, E_SP_REGNUM
, &sp
);
409 mn10300_frame_unwind_init (struct gdbarch
*gdbarch
)
411 frame_unwind_append_sniffer (gdbarch
, dwarf2_frame_sniffer
);
412 frame_unwind_append_sniffer (gdbarch
, mn10300_frame_sniffer
);
413 frame_base_set_default (gdbarch
, &mn10300_frame_base
);
414 set_gdbarch_unwind_dummy_id (gdbarch
, mn10300_dummy_unwind_dummy_id
);
415 set_gdbarch_unwind_pc (gdbarch
, mn10300_unwind_pc
);
416 set_gdbarch_unwind_sp (gdbarch
, mn10300_unwind_sp
);
419 /* Dump out the mn10300 specific architecture information. */
422 mn10300_dump_tdep (struct gdbarch
*current_gdbarch
, struct ui_file
*file
)
424 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
425 fprintf_unfiltered (file
, "mn10300_dump_tdep: am33_mode = %d\n",
429 static struct gdbarch
*
430 mn10300_gdbarch_init (struct gdbarch_info info
,
431 struct gdbarch_list
*arches
)
433 struct gdbarch
*gdbarch
;
434 struct gdbarch_tdep
*tdep
;
436 arches
= gdbarch_list_lookup_by_info (arches
, &info
);
438 return arches
->gdbarch
;
440 tdep
= xmalloc (sizeof (struct gdbarch_tdep
));
441 gdbarch
= gdbarch_alloc (&info
, tdep
);
443 switch (info
.bfd_arch_info
->mach
)
446 case bfd_mach_mn10300
:
447 set_gdbarch_register_name (gdbarch
, mn10300_generic_register_name
);
451 set_gdbarch_register_name (gdbarch
, am33_register_name
);
455 internal_error (__FILE__
, __LINE__
,
456 _("mn10300_gdbarch_init: Unknown mn10300 variant"));
461 set_gdbarch_num_regs (gdbarch
, E_NUM_REGS
);
462 set_gdbarch_register_type (gdbarch
, mn10300_register_type
);
463 set_gdbarch_skip_prologue (gdbarch
, mn10300_skip_prologue
);
464 set_gdbarch_read_pc (gdbarch
, mn10300_read_pc
);
465 set_gdbarch_write_pc (gdbarch
, mn10300_write_pc
);
466 set_gdbarch_pc_regnum (gdbarch
, E_PC_REGNUM
);
467 set_gdbarch_sp_regnum (gdbarch
, E_SP_REGNUM
);
469 /* Stack unwinding. */
470 set_gdbarch_inner_than (gdbarch
, core_addr_lessthan
);
472 set_gdbarch_breakpoint_from_pc (gdbarch
, mn10300_breakpoint_from_pc
);
473 /* decr_pc_after_break? */
475 set_gdbarch_print_insn (gdbarch
, print_insn_mn10300
);
478 /* MVS Note: at least the first one is deprecated! */
479 set_gdbarch_deprecated_use_struct_convention (gdbarch
,
480 mn10300_use_struct_convention
);
481 set_gdbarch_store_return_value (gdbarch
, mn10300_store_return_value
);
482 set_gdbarch_extract_return_value (gdbarch
, mn10300_extract_return_value
);
484 mn10300_frame_unwind_init (gdbarch
);
490 _initialize_mn10300_tdep (void)
492 gdbarch_register (bfd_arch_mn10300
, mn10300_gdbarch_init
, mn10300_dump_tdep
);