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2002-05-24 Michal Ludvig <mludvig@suse.cz>
[deliverable/binutils-gdb.git] / gdb / x86-64-tdep.c
CommitLineData
53e95fcf 1/* Target-dependent code for the x86-64 for GDB, the GNU debugger.
ce0eebec
AC		 2
3 Copyright 2001, 2002 Free Software Foundation, Inc.
4
53e95fcf
JS		 5 Contributed by Jiri Smid, SuSE Labs.
6
7 This file is part of GDB.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
23
24#include "defs.h"
25#include "inferior.h"
26#include "gdbcore.h"
27#include "gdbcmd.h"
28#include "arch-utils.h"
29#include "regcache.h"
30#include "symfile.h"
31#include "x86-64-tdep.h"
32#include "dwarf2cfi.h"
82dbc5f7 33#include "gdb_assert.h"
53e95fcf 34
53e95fcf
JS		 35/* Register numbers of various important registers. */
36#define RAX_REGNUM 0
de220d0f 37#define RDX_REGNUM 3
53e95fcf
JS		 38#define RDI_REGNUM 5
39#define EFLAGS_REGNUM 17
0e04a514 40#define ST0_REGNUM 22
de220d0f
ML		 41#define XMM1_REGNUM 39
42
43struct register_info
44{
45 int size;
46 char *name;
47 struct type **type;
48};
53e95fcf
JS		 49
50/* x86_64_register_raw_size_table[i] is the number of bytes of storage in
51 GDB's register array occupied by register i. */
de220d0f 52static struct register_info x86_64_register_info_table[] = {
91fd20f7
ML		 53 /* 0 */ {8, "rax", &builtin_type_int64},
54 /* 1 */ {8, "rbx", &builtin_type_int64},
55 /* 2 */ {8, "rcx", &builtin_type_int64},
56 /* 3 */ {8, "rdx", &builtin_type_int64},
57 /* 4 */ {8, "rsi", &builtin_type_int64},
58 /* 5 */ {8, "rdi", &builtin_type_int64},
59 /* 6 */ {8, "rbp", &builtin_type_void_func_ptr},
60 /* 7 */ {8, "rsp", &builtin_type_void_func_ptr},
61 /* 8 */ {8, "r8", &builtin_type_int64},
62 /* 9 */ {8, "r9", &builtin_type_int64},
63 /* 10 */ {8, "r10", &builtin_type_int64},
64 /* 11 */ {8, "r11", &builtin_type_int64},
65 /* 12 */ {8, "r12", &builtin_type_int64},
66 /* 13 */ {8, "r13", &builtin_type_int64},
67 /* 14 */ {8, "r14", &builtin_type_int64},
68 /* 15 */ {8, "r15", &builtin_type_int64},
69 /* 16 */ {8, "rip", &builtin_type_void_func_ptr},
70 /* 17 */ {4, "eflags", &builtin_type_int32},
71 /* 18 */ {4, "ds", &builtin_type_int32},
72 /* 19 */ {4, "es", &builtin_type_int32},
73 /* 20 */ {4, "fs", &builtin_type_int32},
74 /* 21 */ {4, "gs", &builtin_type_int32},
75 /* 22 */ {10, "st0", &builtin_type_i387_ext},
76 /* 23 */ {10, "st1", &builtin_type_i387_ext},
77 /* 24 */ {10, "st2", &builtin_type_i387_ext},
78 /* 25 */ {10, "st3", &builtin_type_i387_ext},
79 /* 26 */ {10, "st4", &builtin_type_i387_ext},
80 /* 27 */ {10, "st5", &builtin_type_i387_ext},
81 /* 28 */ {10, "st6", &builtin_type_i387_ext},
82 /* 29 */ {10, "st7", &builtin_type_i387_ext},
83 /* 30 */ {4, "fctrl", &builtin_type_int32},
84 /* 31 */ {4, "fstat", &builtin_type_int32},
85 /* 32 */ {4, "ftag", &builtin_type_int32},
86 /* 33 */ {4, "fiseg", &builtin_type_int32},
87 /* 34 */ {4, "fioff", &builtin_type_int32},
88 /* 35 */ {4, "foseg", &builtin_type_int32},
89 /* 36 */ {4, "fooff", &builtin_type_int32},
90 /* 37 */ {4, "fop", &builtin_type_int32},
91 /* 38 */ {16, "xmm0", &builtin_type_v4sf},
92 /* 39 */ {16, "xmm1", &builtin_type_v4sf},
93 /* 40 */ {16, "xmm2", &builtin_type_v4sf},
94 /* 41 */ {16, "xmm3", &builtin_type_v4sf},
95 /* 42 */ {16, "xmm4", &builtin_type_v4sf},
96 /* 43 */ {16, "xmm5", &builtin_type_v4sf},
97 /* 44 */ {16, "xmm6", &builtin_type_v4sf},
98 /* 45 */ {16, "xmm7", &builtin_type_v4sf},
99 /* 46 */ {16, "xmm8", &builtin_type_v4sf},
100 /* 47 */ {16, "xmm9", &builtin_type_v4sf},
101 /* 48 */ {16, "xmm10", &builtin_type_v4sf},
102 /* 49 */ {16, "xmm11", &builtin_type_v4sf},
103 /* 50 */ {16, "xmm12", &builtin_type_v4sf},
104 /* 51 */ {16, "xmm13", &builtin_type_v4sf},
105 /* 52 */ {16, "xmm14", &builtin_type_v4sf},
106 /* 53 */ {16, "xmm15", &builtin_type_v4sf},
107 /* 54 */ {4, "mxcsr", &builtin_type_int32}
53e95fcf
JS		 108};
109
0e04a514
ML		 110/* This array is a mapping from Dwarf-2 register
111 numbering to GDB's one. Dwarf-2 numbering is
112 defined in x86-64 ABI, section 3.6. */
113static int x86_64_dwarf2gdb_regno_map[] = {
114 0, 1, 2, 3, /* RAX - RDX */
115 4, 5, 6, 7, /* RSI, RDI, RBP, RSP */
116 8, 9, 10, 11, /* R8 - R11 */
117 12, 13, 14, 15, /* R12 - R15 */
118 -1, /* RA - not mapped */
119 XMM1_REGNUM - 1, XMM1_REGNUM, /* XMM0 ... */
120 XMM1_REGNUM + 1, XMM1_REGNUM + 2,
121 XMM1_REGNUM + 3, XMM1_REGNUM + 4,
122 XMM1_REGNUM + 5, XMM1_REGNUM + 6,
123 XMM1_REGNUM + 7, XMM1_REGNUM + 8,
124 XMM1_REGNUM + 9, XMM1_REGNUM + 10,
125 XMM1_REGNUM + 11, XMM1_REGNUM + 12,
126 XMM1_REGNUM + 13, XMM1_REGNUM + 14, /* ... XMM15 */
127 ST0_REGNUM + 0, ST0_REGNUM + 1, /* ST0 ... */
128 ST0_REGNUM + 2, ST0_REGNUM + 3,
129 ST0_REGNUM + 4, ST0_REGNUM + 5,
130 ST0_REGNUM + 6, ST0_REGNUM + 7 /* ... ST7 */
131};
132
133static int x86_64_dwarf2gdb_regno_map_length =
134 sizeof (x86_64_dwarf2gdb_regno_map) /
135 sizeof (x86_64_dwarf2gdb_regno_map[0]);
136
de220d0f
ML		 137/* Number of all registers */
138#define X86_64_NUM_REGS (sizeof (x86_64_register_info_table) / \
139 sizeof (x86_64_register_info_table[0]))
140
141/* Number of general registers. */
142#define X86_64_NUM_GREGS (22)
143
144int x86_64_num_regs = X86_64_NUM_REGS;
145int x86_64_num_gregs = X86_64_NUM_GREGS;
146
b6779aa2
AC		 147/* Did we already print a note about frame pointer? */
148int omit_fp_note_printed = 0;
149
53e95fcf
JS		 150/* Number of bytes of storage in the actual machine representation for
151 register REGNO. */
152int
153x86_64_register_raw_size (int regno)
154{
de220d0f 155 return x86_64_register_info_table[regno].size;
53e95fcf
JS		 156}
157
158/* x86_64_register_byte_table[i] is the offset into the register file of the
159 start of register number i. We initialize this from
de220d0f 160 x86_64_register_info_table. */
53e95fcf
JS		 161int x86_64_register_byte_table[X86_64_NUM_REGS];
162
163/* Index within `registers' of the first byte of the space for register REGNO. */
164int
165x86_64_register_byte (int regno)
166{
167 return x86_64_register_byte_table[regno];
168}
169
170/* Return the GDB type object for the "standard" data type of data in
171 register N. */
172static struct type *
173x86_64_register_virtual_type (int regno)
174{
de220d0f 175 return *x86_64_register_info_table[regno].type;
53e95fcf
JS		 176}
177
53e95fcf
JS		 178/* x86_64_register_convertible is true if register N's virtual format is
179 different from its raw format. Note that this definition assumes
180 that the host supports IEEE 32-bit floats, since it doesn't say
181 that SSE registers need conversion. Even if we can't find a
182 counterexample, this is still sloppy. */
183int
184x86_64_register_convertible (int regno)
185{
186 return IS_FP_REGNUM (regno);
187}
188
189/* Convert data from raw format for register REGNUM in buffer FROM to
190 virtual format with type TYPE in buffer TO. In principle both
191 formats are identical except that the virtual format has two extra
192 bytes appended that aren't used. We set these to zero. */
193void
194x86_64_register_convert_to_virtual (int regnum, struct type *type,
195 char *from, char *to)
196{
82dbc5f7 197 char buf[12];
4657573b 198
82dbc5f7
AC		 199 /* We only support floating-point values. */
200 if (TYPE_CODE (type) != TYPE_CODE_FLT)
201 {
202 warning ("Cannot convert floating-point register value "
203 "to non-floating-point type.");
204 memset (to, 0, TYPE_LENGTH (type));
205 return;
206 }
207 /* First add the necessary padding. */
208 memcpy (buf, from, FPU_REG_RAW_SIZE);
209 memset (buf + FPU_REG_RAW_SIZE, 0, sizeof buf - FPU_REG_RAW_SIZE);
210 /* Convert to TYPE. This should be a no-op, if TYPE is equivalent
211 to the extended floating-point format used by the FPU. */
ce0eebec
AC		 212 convert_typed_floating (to, type, buf,
213 x86_64_register_virtual_type (regnum));
53e95fcf
JS		 214}
215
216/* Convert data from virtual format with type TYPE in buffer FROM to
217 raw format for register REGNUM in buffer TO. Simply omit the two
218 unused bytes. */
219
220void
221x86_64_register_convert_to_raw (struct type *type, int regnum,
222 char *from, char *to)
223{
ce0eebec 224 gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT && TYPE_LENGTH (type) == 12);
82dbc5f7 225 /* Simply omit the two unused bytes. */
53e95fcf
JS		 226 memcpy (to, from, FPU_REG_RAW_SIZE);
227}
53e95fcf 228
0e04a514
ML		 229/* Dwarf-2 <-> GDB register numbers mapping. */
230int
231x86_64_dwarf2_reg_to_regnum (int dw_reg)
232{
233 if (dw_reg < 0 || dw_reg > x86_64_dwarf2gdb_regno_map_length)
234 {
235 warning ("Dwarf-2 uses unmapped register #%d\n", dw_reg);
236 return dw_reg;
237 }
238
239 return x86_64_dwarf2gdb_regno_map[dw_reg];
240}
241
53e95fcf
JS		 242/* This is the variable that is set with "set disassembly-flavour", and
243 its legitimate values. */
244static const char att_flavour[] = "att";
245static const char intel_flavour[] = "intel";
246static const char *valid_flavours[] = {
247 att_flavour,
248 intel_flavour,
249 NULL
250};
251static const char *disassembly_flavour = att_flavour;
252
253static CORE_ADDR
254x86_64_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
255{
256 char buf[8];
257
258 store_unsigned_integer (buf, 8, CALL_DUMMY_ADDRESS ());
259
260 write_memory (sp - 8, buf, 8);
261 return sp - 8;
262}
263
264void
265x86_64_pop_frame (void)
266{
267 generic_pop_current_frame (cfi_pop_frame);
268}
269\f
270
271/* The returning of values is done according to the special algorithm.
272 Some types are returned in registers an some (big structures) in memory.
273 See ABI for details.
274 */
275
276#define MAX_CLASSES 4
277
278enum x86_64_reg_class
279{
280 X86_64_NO_CLASS,
281 X86_64_INTEGER_CLASS,
282 X86_64_INTEGERSI_CLASS,
283 X86_64_SSE_CLASS,
284 X86_64_SSESF_CLASS,
285 X86_64_SSEDF_CLASS,
286 X86_64_SSEUP_CLASS,
287 X86_64_X87_CLASS,
288 X86_64_X87UP_CLASS,
289 X86_64_MEMORY_CLASS
290};
291
292/* Return the union class of CLASS1 and CLASS2.
293 See the x86-64 ABI for details. */
294
295static enum x86_64_reg_class
296merge_classes (enum x86_64_reg_class class1, enum x86_64_reg_class class2)
297{
298 /* Rule #1: If both classes are equal, this is the resulting class. */
299 if (class1 == class2)
300 return class1;
301
302 /* Rule #2: If one of the classes is NO_CLASS, the resulting class is
303 the other class. */
304 if (class1 == X86_64_NO_CLASS)
305 return class2;
306 if (class2 == X86_64_NO_CLASS)
307 return class1;
308
309 /* Rule #3: If one of the classes is MEMORY, the result is MEMORY. */
310 if (class1 == X86_64_MEMORY_CLASS || class2 == X86_64_MEMORY_CLASS)
311 return X86_64_MEMORY_CLASS;
312
313 /* Rule #4: If one of the classes is INTEGER, the result is INTEGER. */
314 if ((class1 == X86_64_INTEGERSI_CLASS && class2 == X86_64_SSESF_CLASS)
315 || (class2 == X86_64_INTEGERSI_CLASS && class1 == X86_64_SSESF_CLASS))
316 return X86_64_INTEGERSI_CLASS;
317 if (class1 == X86_64_INTEGER_CLASS || class1 == X86_64_INTEGERSI_CLASS
318 || class2 == X86_64_INTEGER_CLASS || class2 == X86_64_INTEGERSI_CLASS)
319 return X86_64_INTEGER_CLASS;
320
321 /* Rule #5: If one of the classes is X87 or X87UP class, MEMORY is used. */
322 if (class1 == X86_64_X87_CLASS || class1 == X86_64_X87UP_CLASS
323 || class2 == X86_64_X87_CLASS || class2 == X86_64_X87UP_CLASS)
324 return X86_64_MEMORY_CLASS;
325
326 /* Rule #6: Otherwise class SSE is used. */
327 return X86_64_SSE_CLASS;
328}
329
330
331/* Classify the argument type.
332 CLASSES will be filled by the register class used to pass each word
333 of the operand. The number of words is returned. In case the parameter
334 should be passed in memory, 0 is returned. As a special case for zero
335 sized containers, classes[0] will be NO_CLASS and 1 is returned.
336
337 See the x86-64 PS ABI for details.
338*/
339
340static int
341classify_argument (struct type *type,
342 enum x86_64_reg_class classes[MAX_CLASSES], int bit_offset)
343{
344 int bytes = TYPE_LENGTH (type);
345 int words = (bytes + 8 - 1) / 8;
346
347 switch (TYPE_CODE (type))
348 {
349 case TYPE_CODE_ARRAY:
350 case TYPE_CODE_STRUCT:
351 case TYPE_CODE_UNION:
352 {
353 int i;
354 enum x86_64_reg_class subclasses[MAX_CLASSES];
355
356 /* On x86-64 we pass structures larger than 16 bytes on the stack. */
357 if (bytes > 16)
358 return 0;
359
360 for (i = 0; i < words; i++)
361 classes[i] = X86_64_NO_CLASS;
362
363 /* Zero sized arrays or structures are NO_CLASS. We return 0 to
364 signalize memory class, so handle it as special case. */
365 if (!words)
366 {
367 classes[0] = X86_64_NO_CLASS;
368 return 1;
369 }
370 switch (TYPE_CODE (type))
371 {
372 case TYPE_CODE_STRUCT:
373 {
374 int j;
0004e5a2 375 for (j = 0; j < TYPE_NFIELDS (type); ++j)
53e95fcf 376 {
0004e5a2 377 int num = classify_argument (TYPE_FIELDS (type)[j].type,
53e95fcf 378 subclasses,
0004e5a2 379 (TYPE_FIELDS (type)[j].loc.bitpos
53e95fcf
JS		 380 + bit_offset) % 256);
381 if (!num)
382 return 0;
383 for (i = 0; i < num; i++)
384 {
385 int pos =
0004e5a2 386 (TYPE_FIELDS (type)[j].loc.bitpos + bit_offset) / 8 / 8;
53e95fcf
JS		 387 classes[i + pos] =
388 merge_classes (subclasses[i], classes[i + pos]);
389 }
390 }
391 }
392 break;
393 case TYPE_CODE_ARRAY:
394 {
395 int num;
396
0004e5a2 397 num = classify_argument (TYPE_TARGET_TYPE (type),
53e95fcf
JS		 398 subclasses, bit_offset);
399 if (!num)
400 return 0;
401
402 /* The partial classes are now full classes. */
403 if (subclasses[0] == X86_64_SSESF_CLASS && bytes != 4)
404 subclasses[0] = X86_64_SSE_CLASS;
405 if (subclasses[0] == X86_64_INTEGERSI_CLASS && bytes != 4)
406 subclasses[0] = X86_64_INTEGER_CLASS;
407
408 for (i = 0; i < words; i++)
409 classes[i] = subclasses[i % num];
410 }
411 break;
412 case TYPE_CODE_UNION:
413 {
414 int j;
415 {
0004e5a2 416 for (j = 0; j < TYPE_NFIELDS (type); ++j)
53e95fcf
JS		 417 {
418 int num;
0004e5a2 419 num = classify_argument (TYPE_FIELDS (type)[j].type,
53e95fcf
JS		 420 subclasses, bit_offset);
421 if (!num)
422 return 0;
423 for (i = 0; i < num; i++)
424 classes[i] = merge_classes (subclasses[i], classes[i]);
425 }
426 }
427 }
428 break;
4657573b
ML		 429 default:
430 break;
53e95fcf
JS		 431 }
432 /* Final merger cleanup. */
433 for (i = 0; i < words; i++)
434 {
435 /* If one class is MEMORY, everything should be passed in
436 memory. */
437 if (classes[i] == X86_64_MEMORY_CLASS)
438 return 0;
439
440 /* The X86_64_SSEUP_CLASS should be always preceeded by
441 X86_64_SSE_CLASS. */
442 if (classes[i] == X86_64_SSEUP_CLASS
443 && (i == 0 || classes[i - 1] != X86_64_SSE_CLASS))
444 classes[i] = X86_64_SSE_CLASS;
445
446 /* X86_64_X87UP_CLASS should be preceeded by X86_64_X87_CLASS. */
447 if (classes[i] == X86_64_X87UP_CLASS
448 && (i == 0 || classes[i - 1] != X86_64_X87_CLASS))
449 classes[i] = X86_64_SSE_CLASS;
450 }
451 return words;
452 }
453 break;
454 case TYPE_CODE_FLT:
455 switch (bytes)
456 {
457 case 4:
458 if (!(bit_offset % 64))
459 classes[0] = X86_64_SSESF_CLASS;
460 else
461 classes[0] = X86_64_SSE_CLASS;
462 return 1;
463 case 8:
464 classes[0] = X86_64_SSEDF_CLASS;
465 return 1;
466 case 16:
467 classes[0] = X86_64_X87_CLASS;
468 classes[1] = X86_64_X87UP_CLASS;
469 return 2;
470 }
471 break;
472 case TYPE_CODE_INT:
473 case TYPE_CODE_PTR:
474 switch (bytes)
475 {
476 case 1:
477 case 2:
478 case 4:
479 case 8:
480 if (bytes * 8 + bit_offset <= 32)
481 classes[0] = X86_64_INTEGERSI_CLASS;
482 else
483 classes[0] = X86_64_INTEGER_CLASS;
484 return 1;
485 case 16:
486 classes[0] = classes[1] = X86_64_INTEGER_CLASS;
487 return 2;
488 default:
489 break;
490 }
491 case TYPE_CODE_VOID:
492 return 0;
4657573b
ML		 493 default: /* Avoid warning. */
494 break;
53e95fcf 495 }
ce0eebec
AC		 496 internal_error (__FILE__, __LINE__,
497 "classify_argument: unknown argument type");
53e95fcf
JS		 498}
499
500/* Examine the argument and return set number of register required in each
501 class. Return 0 ifif parameter should be passed in memory. */
502
503static int
504examine_argument (enum x86_64_reg_class classes[MAX_CLASSES],
505 int n, int *int_nregs, int *sse_nregs)
506{
507 *int_nregs = 0;
508 *sse_nregs = 0;
509 if (!n)
510 return 0;
511 for (n--; n >= 0; n--)
512 switch (classes[n])
513 {
514 case X86_64_INTEGER_CLASS:
515 case X86_64_INTEGERSI_CLASS:
516 (*int_nregs)++;
517 break;
518 case X86_64_SSE_CLASS:
519 case X86_64_SSESF_CLASS:
520 case X86_64_SSEDF_CLASS:
521 (*sse_nregs)++;
522 break;
523 case X86_64_NO_CLASS:
524 case X86_64_SSEUP_CLASS:
525 case X86_64_X87_CLASS:
526 case X86_64_X87UP_CLASS:
527 break;
528 case X86_64_MEMORY_CLASS:
ce0eebec
AC		 529 internal_error (__FILE__, __LINE__,
530 "examine_argument: unexpected memory class");
53e95fcf
JS		 531 }
532 return 1;
533}
534
535#define RET_INT_REGS 2
536#define RET_SSE_REGS 2
537
538/* Check if the structure in value_type is returned in registers or in
539 memory. If this function returns 1, gdb will call STORE_STRUCT_RETURN and
540 EXTRACT_STRUCT_VALUE_ADDRESS else STORE_RETURN_VALUE and EXTRACT_RETURN_VALUE
541 will be used. */
542int
543x86_64_use_struct_convention (int gcc_p, struct type *value_type)
544{
545 enum x86_64_reg_class class[MAX_CLASSES];
546 int n = classify_argument (value_type, class, 0);
547 int needed_intregs;
548 int needed_sseregs;
549
550 return (!n ||
551 !examine_argument (class, n, &needed_intregs, &needed_sseregs) ||
552 needed_intregs > RET_INT_REGS || needed_sseregs > RET_SSE_REGS);
553}
554
555
556/* Extract from an array REGBUF containing the (raw) register state, a
557 function return value of TYPE, and copy that, in virtual format,
558 into VALBUF. */
559
560void
561x86_64_extract_return_value (struct type *type, char *regbuf, char *valbuf)
562{
563 enum x86_64_reg_class class[MAX_CLASSES];
564 int n = classify_argument (type, class, 0);
565 int needed_intregs;
566 int needed_sseregs;
567 int intreg = 0;
568 int ssereg = 0;
569 int offset = 0;
570 int ret_int_r[RET_INT_REGS] = { RAX_REGNUM, RDX_REGNUM };
571 int ret_sse_r[RET_SSE_REGS] = { XMM0_REGNUM, XMM1_REGNUM };
572
573 if (!n ||
574 !examine_argument (class, n, &needed_intregs, &needed_sseregs) ||
575 needed_intregs > RET_INT_REGS || needed_sseregs > RET_SSE_REGS)
576 { /* memory class */
577 CORE_ADDR addr;
578 memcpy (&addr, regbuf, REGISTER_RAW_SIZE (RAX_REGNUM));
579 read_memory (addr, valbuf, TYPE_LENGTH (type));
580 return;
581 }
582 else
583 {
584 int i;
585 for (i = 0; i < n; i++)
586 {
587 switch (class[i])
588 {
589 case X86_64_NO_CLASS:
590 break;
591 case X86_64_INTEGER_CLASS:
592 memcpy (valbuf + offset,
593 regbuf + REGISTER_BYTE (ret_int_r[(intreg + 1) / 2]),
594 8);
595 offset += 8;
596 intreg += 2;
597 break;
598 case X86_64_INTEGERSI_CLASS:
599 memcpy (valbuf + offset,
600 regbuf + REGISTER_BYTE (ret_int_r[intreg / 2]), 4);
601 offset += 8;
602 intreg++;
603 break;
604 case X86_64_SSEDF_CLASS:
605 case X86_64_SSESF_CLASS:
606 case X86_64_SSE_CLASS:
607 memcpy (valbuf + offset,
608 regbuf + REGISTER_BYTE (ret_sse_r[(ssereg + 1) / 2]),
609 8);
610 offset += 8;
611 ssereg += 2;
612 break;
613 case X86_64_SSEUP_CLASS:
614 memcpy (valbuf + offset + 8,
615 regbuf + REGISTER_BYTE (ret_sse_r[ssereg / 2]), 8);
616 offset += 8;
617 ssereg++;
618 break;
619 case X86_64_X87_CLASS:
620 memcpy (valbuf + offset, regbuf + REGISTER_BYTE (FP0_REGNUM),
621 8);
622 offset += 8;
623 break;
624 case X86_64_X87UP_CLASS:
625 memcpy (valbuf + offset,
626 regbuf + REGISTER_BYTE (FP0_REGNUM) + 8, 8);
627 offset += 8;
628 break;
629 case X86_64_MEMORY_CLASS:
630 default:
631 internal_error (__FILE__, __LINE__,
632 "Unexpected argument class");
633 }
634 }
635 }
636}
637
638/* Handled by unwind informations. */
639static void
640x86_64_frame_init_saved_regs (struct frame_info *fi)
641{
642}
643
644#define INT_REGS 6
645#define SSE_REGS 16
646
53e95fcf 647CORE_ADDR
d45fc520 648x86_64_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
53e95fcf
JS		 649 int struct_return, CORE_ADDR struct_addr)
650{
651 int intreg = 0;
652 int ssereg = 0;
653 int i;
ce0eebec 654 static int int_parameter_registers[INT_REGS] = {
de220d0f
ML		 655 5 /* RDI */ , 4 /* RSI */ ,
656 3 /* RDX */ , 2 /* RCX */ ,
91fd20f7 657 8 /* R8 */ , 9 /* R9 */
ce0eebec 658 };
53e95fcf 659 /* XMM0 - XMM15 */
ce0eebec 660 static int sse_parameter_registers[SSE_REGS] = {
de220d0f
ML		 661 XMM1_REGNUM - 1, XMM1_REGNUM, XMM1_REGNUM + 1, XMM1_REGNUM + 2,
662 XMM1_REGNUM + 3, XMM1_REGNUM + 4, XMM1_REGNUM + 5, XMM1_REGNUM + 6,
663 XMM1_REGNUM + 7, XMM1_REGNUM + 8, XMM1_REGNUM + 9, XMM1_REGNUM + 10,
664 XMM1_REGNUM + 11, XMM1_REGNUM + 12, XMM1_REGNUM + 13, XMM1_REGNUM + 14
ce0eebec
AC		 665 };
666 int stack_values_count = 0;
82dbc5f7 667 int *stack_values;
e9f30c21 668 stack_values = alloca (nargs * sizeof (int));
53e95fcf
JS		 669 for (i = 0; i < nargs; i++)
670 {
671 enum x86_64_reg_class class[MAX_CLASSES];
672 int n = classify_argument (args[i]->type, class, 0);
673 int needed_intregs;
674 int needed_sseregs;
675
676 if (!n ||
677 !examine_argument (class, n, &needed_intregs, &needed_sseregs)
82dbc5f7
AC		 678 || intreg / 2 + needed_intregs > INT_REGS
679 || ssereg / 2 + needed_sseregs > SSE_REGS)
ce0eebec
AC		 680 { /* memory class */
681 stack_values[stack_values_count++] = i;
53e95fcf
JS		 682 }
683 else
684 {
685 int j;
686 for (j = 0; j < n; j++)
687 {
688 int offset = 0;
689 switch (class[j])
690 {
691 case X86_64_NO_CLASS:
692 break;
693 case X86_64_INTEGER_CLASS:
ce0eebec
AC		 694 write_register_gen (int_parameter_registers
695 [(intreg + 1) / 2],
53e95fcf
JS		 696 VALUE_CONTENTS_ALL (args[i]) + offset);
697 offset += 8;
698 intreg += 2;
699 break;
700 case X86_64_INTEGERSI_CLASS:
701 write_register_gen (int_parameter_registers[intreg / 2],
702 VALUE_CONTENTS_ALL (args[i]) + offset);
703 offset += 8;
704 intreg++;
705 break;
706 case X86_64_SSEDF_CLASS:
707 case X86_64_SSESF_CLASS:
708 case X86_64_SSE_CLASS:
ce0eebec
AC		 709 write_register_gen (sse_parameter_registers
710 [(ssereg + 1) / 2],
53e95fcf
JS		 711 VALUE_CONTENTS_ALL (args[i]) + offset);
712 offset += 8;
713 ssereg += 2;
714 break;
715 case X86_64_SSEUP_CLASS:
716 write_register_gen (sse_parameter_registers[ssereg / 2],
717 VALUE_CONTENTS_ALL (args[i]) + offset);
718 offset += 8;
719 ssereg++;
720 break;
721 case X86_64_X87_CLASS:
53e95fcf 722 case X86_64_MEMORY_CLASS:
ce0eebec 723 stack_values[stack_values_count++] = i;
82dbc5f7
AC		 724 break;
725 case X86_64_X87UP_CLASS:
53e95fcf
JS		 726 break;
727 default:
728 internal_error (__FILE__, __LINE__,
729 "Unexpected argument class");
730 }
731 intreg += intreg % 2;
732 ssereg += ssereg % 2;
733 }
734 }
735 }
82dbc5f7
AC		 736 while (--stack_values_count >= 0)
737 {
e9f30c21 738 struct value *arg = args[stack_values[stack_values_count]];
82dbc5f7
AC		 739 int len = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (arg));
740 len += 7;
741 len -= len % 8;
742 sp -= len;
743 write_memory (sp, VALUE_CONTENTS_ALL (arg), len);
744 }
53e95fcf
JS		 745 return sp;
746}
747
748/* Write into the appropriate registers a function return value stored
749 in VALBUF of type TYPE, given in virtual format. */
750void
751x86_64_store_return_value (struct type *type, char *valbuf)
752{
753 int len = TYPE_LENGTH (type);
754
755 if (TYPE_CODE_FLT == TYPE_CODE (type))
756 {
757 /* Floating-point return values can be found in %st(0). */
758 if (len == TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT
759 && TARGET_LONG_DOUBLE_FORMAT == &floatformat_i387_ext)
760 {
761 /* Copy straight over. */
762 write_register_bytes (REGISTER_BYTE (FP0_REGNUM), valbuf,
763 FPU_REG_RAW_SIZE);
764 }
765 else
766 {
767 char buf[FPU_REG_RAW_SIZE];
768 DOUBLEST val;
769
770 /* Convert the value found in VALBUF to the extended
771 floating point format used by the FPU. This is probably
772 not exactly how it would happen on the target itself, but
773 it is the best we can do. */
774 val = extract_floating (valbuf, TYPE_LENGTH (type));
775 floatformat_from_doublest (&floatformat_i387_ext, &val, buf);
776 write_register_bytes (REGISTER_BYTE (FP0_REGNUM), buf,
777 FPU_REG_RAW_SIZE);
778 }
779 }
780 else
781 {
782 int low_size = REGISTER_RAW_SIZE (0);
783 int high_size = REGISTER_RAW_SIZE (1);
784
785 if (len <= low_size)
786 write_register_bytes (REGISTER_BYTE (0), valbuf, len);
787 else if (len <= (low_size + high_size))
788 {
789 write_register_bytes (REGISTER_BYTE (0), valbuf, low_size);
790 write_register_bytes (REGISTER_BYTE (1),
791 valbuf + low_size, len - low_size);
792 }
793 else
794 internal_error (__FILE__, __LINE__,
795 "Cannot store return value of %d bytes long.", len);
796 }
797}
798\f
799
800static char *
801x86_64_register_name (int reg_nr)
802{
de220d0f 803 if (reg_nr < 0 || reg_nr >= X86_64_NUM_REGS)
53e95fcf 804 return NULL;
de220d0f 805 return x86_64_register_info_table[reg_nr].name;
53e95fcf
JS		 806}
807\f
808
809
810/* We have two flavours of disassembly. The machinery on this page
811 deals with switching between those. */
812
813static int
814gdb_print_insn_x86_64 (bfd_vma memaddr, disassemble_info * info)
815{
816 if (disassembly_flavour == att_flavour)
817 return print_insn_i386_att (memaddr, info);
818 else if (disassembly_flavour == intel_flavour)
819 return print_insn_i386_intel (memaddr, info);
820 /* Never reached -- disassembly_flavour is always either att_flavour
821 or intel_flavour. */
822 internal_error (__FILE__, __LINE__, "failed internal consistency check");
823}
824\f
825
826/* Store the address of the place in which to copy the structure the
827 subroutine will return. This is called from call_function. */
828void
829x86_64_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
830{
831 write_register (RDI_REGNUM, addr);
832}
833
834int
835x86_64_frameless_function_invocation (struct frame_info *frame)
836{
837 return 0;
838}
839
e76e1718
ML		 840/* If a function with debugging information and known beginning
841 is detected, we will return pc of the next line in the source
842 code. With this approach we effectively skip the prolog. */
843
844#define PROLOG_BUFSIZE 4
53e95fcf
JS		 845CORE_ADDR
846x86_64_skip_prologue (CORE_ADDR pc)
847{
e76e1718
ML		 848 int i, firstline, currline;
849 struct symtab_and_line v_sal;
850 struct symbol *v_function;
851 CORE_ADDR salendaddr = 0, endaddr = 0;
852
853 /* We will handle only functions beginning with:
854 55 pushq %rbp
855 48 89 e5 movq %rsp,%rbp
856 */
857 unsigned char prolog_expect[PROLOG_BUFSIZE] = { 0x55, 0x48, 0x89, 0xe5 },
858 prolog_buf[PROLOG_BUFSIZE];
859
860 read_memory (pc, (char *) prolog_buf, PROLOG_BUFSIZE);
861
b1ab997b
ML		 862 /* First check, whether pc points to pushq %rbp, movq %rsp,%rbp. */
863 for (i = 0; i < PROLOG_BUFSIZE; i++)
b6779aa2 864 if (prolog_expect[i] != prolog_buf[i])
b1ab997b
ML		 865 return pc; /* ... no, it doesn't. Nothing to skip. */
866
867 /* OK, we have found the prologue and want PC of the first
868 non-prologue instruction. */
869 pc += PROLOG_BUFSIZE;
e76e1718
ML		 870
871 v_function = find_pc_function (pc);
872 v_sal = find_pc_line (pc, 0);
873
874 /* If pc doesn't point to a function with debuginfo,
875 some of the following may be NULL. */
876 if (!v_function || !v_function->ginfo.value.block || !v_sal.symtab)
877 return pc;
878
879 firstline = v_sal.line;
880 currline = firstline;
881 salendaddr = v_sal.end;
882 endaddr = v_function->ginfo.value.block->endaddr;
883
884 for (i = 0; i < v_sal.symtab->linetable->nitems; i++)
885 if (v_sal.symtab->linetable->item[i].line > firstline
886 && v_sal.symtab->linetable->item[i].pc >= salendaddr
887 && v_sal.symtab->linetable->item[i].pc < endaddr)
888 {
889 pc = v_sal.symtab->linetable->item[i].pc;
890 currline = v_sal.symtab->linetable->item[i].line;
891 break;
892 }
893
53e95fcf
JS		 894 return pc;
895}
896
897/* Sequence of bytes for breakpoint instruction. */
898static unsigned char *
de220d0f 899x86_64_breakpoint_from_pc (CORE_ADDR * pc, int *lenptr)
53e95fcf
JS		 900{
901 static unsigned char breakpoint[] = { 0xcc };
902 *lenptr = 1;
903 return breakpoint;
904}
905
906static struct gdbarch *
0e04a514 907x86_64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
53e95fcf
JS		 908{
909 struct gdbarch *gdbarch;
910 struct gdbarch_tdep *tdep;
de220d0f 911 int i, sum;
53e95fcf
JS		 912
913 /* Find a candidate among the list of pre-declared architectures. */
914 for (arches = gdbarch_list_lookup_by_info (arches, &info);
915 arches != NULL;
916 arches = gdbarch_list_lookup_by_info (arches->next, &info))
917 {
918 switch (info.bfd_arch_info->mach)
919 {
920 case bfd_mach_x86_64:
921 case bfd_mach_x86_64_intel_syntax:
922 switch (gdbarch_bfd_arch_info (arches->gdbarch)->mach)
923 {
924 case bfd_mach_x86_64:
925 case bfd_mach_x86_64_intel_syntax:
926 return arches->gdbarch;
927 case bfd_mach_i386_i386:
928 case bfd_mach_i386_i8086:
929 case bfd_mach_i386_i386_intel_syntax:
930 break;
931 default:
932 internal_error (__FILE__, __LINE__,
0e04a514 933 "x86_64_gdbarch_init: unknown machine type");
53e95fcf
JS		 934 }
935 break;
936 case bfd_mach_i386_i386:
937 case bfd_mach_i386_i8086:
938 case bfd_mach_i386_i386_intel_syntax:
939 switch (gdbarch_bfd_arch_info (arches->gdbarch)->mach)
940 {
941 case bfd_mach_x86_64:
942 case bfd_mach_x86_64_intel_syntax:
943 break;
944 case bfd_mach_i386_i386:
945 case bfd_mach_i386_i8086:
946 case bfd_mach_i386_i386_intel_syntax:
947 return arches->gdbarch;
948 default:
949 internal_error (__FILE__, __LINE__,
0e04a514 950 "x86_64_gdbarch_init: unknown machine type");
53e95fcf
JS		 951 }
952 break;
953 default:
954 internal_error (__FILE__, __LINE__,
0e04a514 955 "x86_64_gdbarch_init: unknown machine type");
53e95fcf
JS		 956 }
957 }
958
959 tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep));
960 gdbarch = gdbarch_alloc (&info, tdep);
961
962 switch (info.bfd_arch_info->mach)
963 {
964 case bfd_mach_x86_64:
965 case bfd_mach_x86_64_intel_syntax:
96297dab 966 tdep->num_xmm_regs = 16;
53e95fcf
JS		 967 break;
968 case bfd_mach_i386_i386:
969 case bfd_mach_i386_i8086:
970 case bfd_mach_i386_i386_intel_syntax:
971 /* This is place for definition of i386 target vector. */
972 break;
973 default:
974 internal_error (__FILE__, __LINE__,
0e04a514 975 "x86_64_gdbarch_init: unknown machine type");
53e95fcf
JS		 976 }
977
978 set_gdbarch_long_bit (gdbarch, 64);
979 set_gdbarch_long_long_bit (gdbarch, 64);
980 set_gdbarch_ptr_bit (gdbarch, 64);
981
982 set_gdbarch_long_double_format (gdbarch, &floatformat_i387_ext);
53e95fcf
JS		 983
984 set_gdbarch_num_regs (gdbarch, X86_64_NUM_REGS);
985 set_gdbarch_register_name (gdbarch, x86_64_register_name);
986 set_gdbarch_register_size (gdbarch, 8);
987 set_gdbarch_register_raw_size (gdbarch, x86_64_register_raw_size);
988 set_gdbarch_max_register_raw_size (gdbarch, 16);
989 set_gdbarch_register_byte (gdbarch, x86_64_register_byte);
de220d0f 990
53e95fcf
JS		 991 /* Total amount of space needed to store our copies of the machine's register
992 (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS + SIZEOF_SSE_REGS) */
de220d0f
ML		 993 for (i = 0, sum = 0; i < X86_64_NUM_REGS; i++)
994 sum += x86_64_register_info_table[i].size;
995 set_gdbarch_register_bytes (gdbarch, sum);
b2e75d78 996 set_gdbarch_register_virtual_size (gdbarch, generic_register_size);
53e95fcf
JS		 997 set_gdbarch_max_register_virtual_size (gdbarch, 16);
998
999 set_gdbarch_register_virtual_type (gdbarch, x86_64_register_virtual_type);
1000
1001 set_gdbarch_register_convertible (gdbarch, x86_64_register_convertible);
1002 set_gdbarch_register_convert_to_virtual (gdbarch,
1003 x86_64_register_convert_to_virtual);
1004 set_gdbarch_register_convert_to_raw (gdbarch,
1005 x86_64_register_convert_to_raw);
1006
1007/* Register numbers of various important registers. */
1008 set_gdbarch_sp_regnum (gdbarch, 7); /* (rsp) Contains address of top of stack. */
1009 set_gdbarch_fp_regnum (gdbarch, 6); /* (rbp) */
1010 set_gdbarch_pc_regnum (gdbarch, 16); /* (rip) Contains program counter. */
1011
de220d0f 1012 set_gdbarch_fp0_regnum (gdbarch, X86_64_NUM_GREGS); /* First FPU floating-point register. */
53e95fcf
JS		 1013
1014 set_gdbarch_read_fp (gdbarch, cfi_read_fp);
53e95fcf
JS		 1015
1016/* Discard from the stack the innermost frame, restoring all registers. */
1017 set_gdbarch_pop_frame (gdbarch, x86_64_pop_frame);
1018
1019 /* FRAME_CHAIN takes a frame's nominal address and produces the frame's
1020 chain-pointer. */
1021 set_gdbarch_frame_chain (gdbarch, cfi_frame_chain);
1022
1023 set_gdbarch_frameless_function_invocation (gdbarch,
1024 x86_64_frameless_function_invocation);
1025 set_gdbarch_frame_saved_pc (gdbarch, x86_64_linux_frame_saved_pc);
1026
1027 set_gdbarch_frame_args_address (gdbarch, default_frame_address);
1028 set_gdbarch_frame_locals_address (gdbarch, default_frame_address);
1029
1030/* Return number of bytes at start of arglist that are not really args. */
1031 set_gdbarch_frame_args_skip (gdbarch, 8);
1032
1033 set_gdbarch_frame_init_saved_regs (gdbarch, x86_64_frame_init_saved_regs);
1034
1035/* Frame pc initialization is handled by unwind informations. */
1036 set_gdbarch_init_frame_pc (gdbarch, cfi_init_frame_pc);
1037
1038/* Initialization of unwind informations. */
1039 set_gdbarch_init_extra_frame_info (gdbarch, cfi_init_extra_frame_info);
1040
1041/* Getting saved registers is handled by unwind informations. */
1042 set_gdbarch_get_saved_register (gdbarch, cfi_get_saved_register);
1043
1044 set_gdbarch_frame_init_saved_regs (gdbarch, x86_64_frame_init_saved_regs);
1045
1046/* Cons up virtual frame pointer for trace */
1047 set_gdbarch_virtual_frame_pointer (gdbarch, cfi_virtual_frame_pointer);
1048
1049
1050 set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid);
1051
1052 set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
1053 set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
1054 set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
1055 set_gdbarch_call_dummy_length (gdbarch, 0);
1056 set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
1057 set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
1058 set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_at_entry_point);
1059 set_gdbarch_call_dummy_words (gdbarch, 0);
1060 set_gdbarch_sizeof_call_dummy_words (gdbarch, 0);
1061 set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
1062 set_gdbarch_call_dummy_p (gdbarch, 1);
1063 set_gdbarch_call_dummy_start_offset (gdbarch, 0);
1064 set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
1065 set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
1066 set_gdbarch_push_return_address (gdbarch, x86_64_push_return_address);
1067 set_gdbarch_push_arguments (gdbarch, x86_64_push_arguments);
1068
1069/* Return number of args passed to a frame, no way to tell. */
1070 set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
1071/* Don't use default structure extract routine */
1072 set_gdbarch_extract_struct_value_address (gdbarch, 0);
1073
1074/* If USE_STRUCT_CONVENTION retruns 0, then gdb uses STORE_RETURN_VALUE
1075 and EXTRACT_RETURN_VALUE to store/fetch the functions return value. It is
1076 the case when structure is returned in registers. */
1077 set_gdbarch_use_struct_convention (gdbarch, x86_64_use_struct_convention);
1078
1079/* Store the address of the place in which to copy the structure the
1080 subroutine will return. This is called from call_function. */
1081 set_gdbarch_store_struct_return (gdbarch, x86_64_store_struct_return);
1082
1083/* Extract from an array REGBUF containing the (raw) register state
1084 a function return value of type TYPE, and copy that, in virtual format,
1085 into VALBUF. */
1086 set_gdbarch_extract_return_value (gdbarch, x86_64_extract_return_value);
1087
1088
1089/* Write into the appropriate registers a function return value stored
1090 in VALBUF of type TYPE, given in virtual format. */
1091 set_gdbarch_store_return_value (gdbarch, x86_64_store_return_value);
1092\f
1093
1094/* Offset from address of function to start of its code. */
1095 set_gdbarch_function_start_offset (gdbarch, 0);
1096
1097 set_gdbarch_skip_prologue (gdbarch, x86_64_skip_prologue);
1098
1099 set_gdbarch_saved_pc_after_call (gdbarch, x86_64_linux_saved_pc_after_call);
1100
1101 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1102
91fd20f7
ML		 1103 set_gdbarch_breakpoint_from_pc (gdbarch,
1104 (gdbarch_breakpoint_from_pc_ftype *)
1105 x86_64_breakpoint_from_pc);
53e95fcf
JS		 1106
1107
1108/* Amount PC must be decremented by after a breakpoint. This is often the
1109 number of bytes in BREAKPOINT but not always. */
1110 set_gdbarch_decr_pc_after_break (gdbarch, 1);
1111
b6af0555
JS		 1112/* Use dwarf2 debug frame informations. */
1113 set_gdbarch_dwarf2_build_frame_info (gdbarch, dwarf2_build_frame_info);
0e04a514
ML		 1114 set_gdbarch_dwarf2_reg_to_regnum (gdbarch, x86_64_dwarf2_reg_to_regnum);
1115
53e95fcf
JS		 1116 return gdbarch;
1117}
1118
1119void
1120_initialize_x86_64_tdep (void)
1121{
0e04a514 1122 register_gdbarch_init (bfd_arch_i386, x86_64_gdbarch_init);
53e95fcf
JS		 1123
1124 /* Initialize the table saying where each register starts in the
1125 register file. */
1126 {
1127 int i, offset;
1128
1129 offset = 0;
1130 for (i = 0; i < X86_64_NUM_REGS; i++)
1131 {
1132 x86_64_register_byte_table[i] = offset;
de220d0f 1133 offset += x86_64_register_info_table[i].size;
53e95fcf
JS		 1134 }
1135 }
1136
1137 tm_print_insn = gdb_print_insn_x86_64;
1138 tm_print_insn_info.mach = bfd_lookup_arch (bfd_arch_i386, 3)->mach;
1139
1140 /* Add the variable that controls the disassembly flavour. */
1141 {
1142 struct cmd_list_element *new_cmd;
1143
1144 new_cmd = add_set_enum_cmd ("disassembly-flavour", no_class,
1145 valid_flavours, &disassembly_flavour, "\
1146Set the disassembly flavour, the valid values are \"att\" and \"intel\", \
1147and the default value is \"att\".", &setlist);
1148 add_show_from_set (new_cmd, &showlist);
1149 }
1150}
GDB Binutils - Deliverables
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