1 /* Target-dependent code for the x86-64 for GDB, the GNU debugger.
3 Copyright 2001, 2002 Free Software Foundation, Inc.
5 Contributed by Jiri Smid, SuSE Labs.
7 This file is part of GDB.
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.
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.
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. */
28 #include "arch-utils.h"
31 #include "x86-64-tdep.h"
32 #include "dwarf2cfi.h"
33 #include "gdb_assert.h"
35 /* Register numbers of various important registers. */
39 #define EFLAGS_REGNUM 17
41 #define XMM1_REGNUM 39
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. */
52 static struct register_info x86_64_register_info_table[] = {
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}
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. */
113 static 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 */
133 static int x86_64_dwarf2gdb_regno_map_length =
134 sizeof (x86_64_dwarf2gdb_regno_map) /
135 sizeof (x86_64_dwarf2gdb_regno_map[0]);
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]))
141 /* Number of general registers. */
142 #define X86_64_NUM_GREGS (22)
144 int x86_64_num_regs = X86_64_NUM_REGS;
145 int x86_64_num_gregs = X86_64_NUM_GREGS;
147 /* Did we already print a note about frame pointer? */
148 int omit_fp_note_printed = 0;
150 /* Number of bytes of storage in the actual machine representation for
153 x86_64_register_raw_size (int regno)
155 return x86_64_register_info_table[regno].size;
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
160 x86_64_register_info_table. */
161 int x86_64_register_byte_table[X86_64_NUM_REGS];
163 /* Index within `registers' of the first byte of the space for register REGNO. */
165 x86_64_register_byte (int regno)
167 return x86_64_register_byte_table[regno];
170 /* Return the GDB type object for the "standard" data type of data in
173 x86_64_register_virtual_type (int regno)
175 return *x86_64_register_info_table[regno].type;
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. */
184 x86_64_register_convertible (int regno)
186 return IS_FP_REGNUM (regno);
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. */
194 x86_64_register_convert_to_virtual (int regnum, struct type *type,
195 char *from, char *to)
199 /* We only support floating-point values. */
200 if (TYPE_CODE (type) != TYPE_CODE_FLT)
202 warning ("Cannot convert floating-point register value "
203 "to non-floating-point type.");
204 memset (to, 0, TYPE_LENGTH (type));
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. */
212 convert_typed_floating (to, type, buf,
213 x86_64_register_virtual_type (regnum));
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
221 x86_64_register_convert_to_raw (struct type *type, int regnum,
222 char *from, char *to)
224 gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT && TYPE_LENGTH (type) == 12);
225 /* Simply omit the two unused bytes. */
226 memcpy (to, from, FPU_REG_RAW_SIZE);
229 /* Dwarf-2 <-> GDB register numbers mapping. */
231 x86_64_dwarf2_reg_to_regnum (int dw_reg)
233 if (dw_reg < 0 || dw_reg > x86_64_dwarf2gdb_regno_map_length)
235 warning ("Dwarf-2 uses unmapped register #%d\n", dw_reg);
239 return x86_64_dwarf2gdb_regno_map[dw_reg];
242 /* This is the variable that is set with "set disassembly-flavour", and
243 its legitimate values. */
244 static const char att_flavour[] = "att";
245 static const char intel_flavour[] = "intel";
246 static const char *valid_flavours[] = {
251 static const char *disassembly_flavour = att_flavour;
254 x86_64_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
258 store_unsigned_integer (buf, 8, CALL_DUMMY_ADDRESS ());
260 write_memory (sp - 8, buf, 8);
265 x86_64_pop_frame (void)
267 generic_pop_current_frame (cfi_pop_frame);
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.
276 #define MAX_CLASSES 4
278 enum x86_64_reg_class
281 X86_64_INTEGER_CLASS,
282 X86_64_INTEGERSI_CLASS,
292 /* Return the union class of CLASS1 and CLASS2.
293 See the x86-64 ABI for details. */
295 static enum x86_64_reg_class
296 merge_classes (enum x86_64_reg_class class1, enum x86_64_reg_class class2)
298 /* Rule #1: If both classes are equal, this is the resulting class. */
299 if (class1 == class2)
302 /* Rule #2: If one of the classes is NO_CLASS, the resulting class is
304 if (class1 == X86_64_NO_CLASS)
306 if (class2 == X86_64_NO_CLASS)
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;
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;
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;
326 /* Rule #6: Otherwise class SSE is used. */
327 return X86_64_SSE_CLASS;
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.
337 See the x86-64 PS ABI for details.
341 classify_argument (struct type *type,
342 enum x86_64_reg_class classes[MAX_CLASSES], int bit_offset)
344 int bytes = TYPE_LENGTH (type);
345 int words = (bytes + 8 - 1) / 8;
347 switch (TYPE_CODE (type))
349 case TYPE_CODE_ARRAY:
350 case TYPE_CODE_STRUCT:
351 case TYPE_CODE_UNION:
354 enum x86_64_reg_class subclasses[MAX_CLASSES];
356 /* On x86-64 we pass structures larger than 16 bytes on the stack. */
360 for (i = 0; i < words; i++)
361 classes[i] = X86_64_NO_CLASS;
363 /* Zero sized arrays or structures are NO_CLASS. We return 0 to
364 signalize memory class, so handle it as special case. */
367 classes[0] = X86_64_NO_CLASS;
370 switch (TYPE_CODE (type))
372 case TYPE_CODE_STRUCT:
375 for (j = 0; j < TYPE_NFIELDS (type); ++j)
377 int num = classify_argument (TYPE_FIELDS (type)[j].type,
379 (TYPE_FIELDS (type)[j].loc.
380 bitpos + bit_offset) % 256);
383 for (i = 0; i < num; i++)
386 (TYPE_FIELDS (type)[j].loc.bitpos +
389 merge_classes (subclasses[i], classes[i + pos]);
394 case TYPE_CODE_ARRAY:
398 num = classify_argument (TYPE_TARGET_TYPE (type),
399 subclasses, bit_offset);
403 /* The partial classes are now full classes. */
404 if (subclasses[0] == X86_64_SSESF_CLASS && bytes != 4)
405 subclasses[0] = X86_64_SSE_CLASS;
406 if (subclasses[0] == X86_64_INTEGERSI_CLASS && bytes != 4)
407 subclasses[0] = X86_64_INTEGER_CLASS;
409 for (i = 0; i < words; i++)
410 classes[i] = subclasses[i % num];
413 case TYPE_CODE_UNION:
417 for (j = 0; j < TYPE_NFIELDS (type); ++j)
420 num = classify_argument (TYPE_FIELDS (type)[j].type,
421 subclasses, bit_offset);
424 for (i = 0; i < num; i++)
425 classes[i] = merge_classes (subclasses[i], classes[i]);
433 /* Final merger cleanup. */
434 for (i = 0; i < words; i++)
436 /* If one class is MEMORY, everything should be passed in
438 if (classes[i] == X86_64_MEMORY_CLASS)
441 /* The X86_64_SSEUP_CLASS should be always preceeded by
443 if (classes[i] == X86_64_SSEUP_CLASS
444 && (i == 0 || classes[i - 1] != X86_64_SSE_CLASS))
445 classes[i] = X86_64_SSE_CLASS;
447 /* X86_64_X87UP_CLASS should be preceeded by X86_64_X87_CLASS. */
448 if (classes[i] == X86_64_X87UP_CLASS
449 && (i == 0 || classes[i - 1] != X86_64_X87_CLASS))
450 classes[i] = X86_64_SSE_CLASS;
459 if (!(bit_offset % 64))
460 classes[0] = X86_64_SSESF_CLASS;
462 classes[0] = X86_64_SSE_CLASS;
465 classes[0] = X86_64_SSEDF_CLASS;
468 classes[0] = X86_64_X87_CLASS;
469 classes[1] = X86_64_X87UP_CLASS;
481 if (bytes * 8 + bit_offset <= 32)
482 classes[0] = X86_64_INTEGERSI_CLASS;
484 classes[0] = X86_64_INTEGER_CLASS;
487 classes[0] = classes[1] = X86_64_INTEGER_CLASS;
494 default: /* Avoid warning. */
497 internal_error (__FILE__, __LINE__,
498 "classify_argument: unknown argument type");
501 /* Examine the argument and return set number of register required in each
502 class. Return 0 ifif parameter should be passed in memory. */
505 examine_argument (enum x86_64_reg_class classes[MAX_CLASSES],
506 int n, int *int_nregs, int *sse_nregs)
512 for (n--; n >= 0; n--)
515 case X86_64_INTEGER_CLASS:
516 case X86_64_INTEGERSI_CLASS:
519 case X86_64_SSE_CLASS:
520 case X86_64_SSESF_CLASS:
521 case X86_64_SSEDF_CLASS:
524 case X86_64_NO_CLASS:
525 case X86_64_SSEUP_CLASS:
526 case X86_64_X87_CLASS:
527 case X86_64_X87UP_CLASS:
529 case X86_64_MEMORY_CLASS:
530 internal_error (__FILE__, __LINE__,
531 "examine_argument: unexpected memory class");
536 #define RET_INT_REGS 2
537 #define RET_SSE_REGS 2
539 /* Check if the structure in value_type is returned in registers or in
540 memory. If this function returns 1, gdb will call STORE_STRUCT_RETURN and
541 EXTRACT_STRUCT_VALUE_ADDRESS else STORE_RETURN_VALUE and EXTRACT_RETURN_VALUE
544 x86_64_use_struct_convention (int gcc_p, struct type *value_type)
546 enum x86_64_reg_class class[MAX_CLASSES];
547 int n = classify_argument (value_type, class, 0);
552 !examine_argument (class, n, &needed_intregs, &needed_sseregs) ||
553 needed_intregs > RET_INT_REGS || needed_sseregs > RET_SSE_REGS);
557 /* Extract from an array REGBUF containing the (raw) register state, a
558 function return value of TYPE, and copy that, in virtual format,
562 x86_64_extract_return_value (struct type *type, char *regbuf, char *valbuf)
564 enum x86_64_reg_class class[MAX_CLASSES];
565 int n = classify_argument (type, class, 0);
571 int ret_int_r[RET_INT_REGS] = { RAX_REGNUM, RDX_REGNUM };
572 int ret_sse_r[RET_SSE_REGS] = { XMM0_REGNUM, XMM1_REGNUM };
575 !examine_argument (class, n, &needed_intregs, &needed_sseregs) ||
576 needed_intregs > RET_INT_REGS || needed_sseregs > RET_SSE_REGS)
579 memcpy (&addr, regbuf, REGISTER_RAW_SIZE (RAX_REGNUM));
580 read_memory (addr, valbuf, TYPE_LENGTH (type));
586 for (i = 0; i < n; i++)
590 case X86_64_NO_CLASS:
592 case X86_64_INTEGER_CLASS:
593 memcpy (valbuf + offset,
594 regbuf + REGISTER_BYTE (ret_int_r[(intreg + 1) / 2]),
599 case X86_64_INTEGERSI_CLASS:
600 memcpy (valbuf + offset,
601 regbuf + REGISTER_BYTE (ret_int_r[intreg / 2]), 4);
605 case X86_64_SSEDF_CLASS:
606 case X86_64_SSESF_CLASS:
607 case X86_64_SSE_CLASS:
608 memcpy (valbuf + offset,
609 regbuf + REGISTER_BYTE (ret_sse_r[(ssereg + 1) / 2]),
614 case X86_64_SSEUP_CLASS:
615 memcpy (valbuf + offset + 8,
616 regbuf + REGISTER_BYTE (ret_sse_r[ssereg / 2]), 8);
620 case X86_64_X87_CLASS:
621 memcpy (valbuf + offset, regbuf + REGISTER_BYTE (FP0_REGNUM),
625 case X86_64_X87UP_CLASS:
626 memcpy (valbuf + offset,
627 regbuf + REGISTER_BYTE (FP0_REGNUM) + 8, 8);
630 case X86_64_MEMORY_CLASS:
632 internal_error (__FILE__, __LINE__,
633 "Unexpected argument class");
639 /* Handled by unwind informations. */
641 x86_64_frame_init_saved_regs (struct frame_info *fi)
649 x86_64_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
650 int struct_return, CORE_ADDR struct_addr)
655 static int int_parameter_registers[INT_REGS] = {
656 5 /* RDI */ , 4 /* RSI */ ,
657 3 /* RDX */ , 2 /* RCX */ ,
658 8 /* R8 */ , 9 /* R9 */
661 static int sse_parameter_registers[SSE_REGS] = {
662 XMM1_REGNUM - 1, XMM1_REGNUM, XMM1_REGNUM + 1, XMM1_REGNUM + 2,
663 XMM1_REGNUM + 3, XMM1_REGNUM + 4, XMM1_REGNUM + 5, XMM1_REGNUM + 6,
664 XMM1_REGNUM + 7, XMM1_REGNUM + 8, XMM1_REGNUM + 9, XMM1_REGNUM + 10,
665 XMM1_REGNUM + 11, XMM1_REGNUM + 12, XMM1_REGNUM + 13, XMM1_REGNUM + 14
667 int stack_values_count = 0;
669 stack_values = alloca (nargs * sizeof (int));
670 for (i = 0; i < nargs; i++)
672 enum x86_64_reg_class class[MAX_CLASSES];
673 int n = classify_argument (args[i]->type, class, 0);
678 !examine_argument (class, n, &needed_intregs, &needed_sseregs)
679 || intreg / 2 + needed_intregs > INT_REGS
680 || ssereg / 2 + needed_sseregs > SSE_REGS)
682 stack_values[stack_values_count++] = i;
687 for (j = 0; j < n; j++)
692 case X86_64_NO_CLASS:
694 case X86_64_INTEGER_CLASS:
695 write_register_gen (int_parameter_registers
697 VALUE_CONTENTS_ALL (args[i]) + offset);
701 case X86_64_INTEGERSI_CLASS:
702 write_register_gen (int_parameter_registers[intreg / 2],
703 VALUE_CONTENTS_ALL (args[i]) + offset);
707 case X86_64_SSEDF_CLASS:
708 case X86_64_SSESF_CLASS:
709 case X86_64_SSE_CLASS:
710 write_register_gen (sse_parameter_registers
712 VALUE_CONTENTS_ALL (args[i]) + offset);
716 case X86_64_SSEUP_CLASS:
717 write_register_gen (sse_parameter_registers[ssereg / 2],
718 VALUE_CONTENTS_ALL (args[i]) + offset);
722 case X86_64_X87_CLASS:
723 case X86_64_MEMORY_CLASS:
724 stack_values[stack_values_count++] = i;
726 case X86_64_X87UP_CLASS:
729 internal_error (__FILE__, __LINE__,
730 "Unexpected argument class");
732 intreg += intreg % 2;
733 ssereg += ssereg % 2;
737 while (--stack_values_count >= 0)
739 struct value *arg = args[stack_values[stack_values_count]];
740 int len = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (arg));
744 write_memory (sp, VALUE_CONTENTS_ALL (arg), len);
749 /* Write into the appropriate registers a function return value stored
750 in VALBUF of type TYPE, given in virtual format. */
752 x86_64_store_return_value (struct type *type, char *valbuf)
754 int len = TYPE_LENGTH (type);
756 if (TYPE_CODE_FLT == TYPE_CODE (type))
758 /* Floating-point return values can be found in %st(0). */
759 if (len == TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT
760 && TARGET_LONG_DOUBLE_FORMAT == &floatformat_i387_ext)
762 /* Copy straight over. */
763 write_register_bytes (REGISTER_BYTE (FP0_REGNUM), valbuf,
768 char buf[FPU_REG_RAW_SIZE];
771 /* Convert the value found in VALBUF to the extended
772 floating point format used by the FPU. This is probably
773 not exactly how it would happen on the target itself, but
774 it is the best we can do. */
775 val = extract_floating (valbuf, TYPE_LENGTH (type));
776 floatformat_from_doublest (&floatformat_i387_ext, &val, buf);
777 write_register_bytes (REGISTER_BYTE (FP0_REGNUM), buf,
783 int low_size = REGISTER_RAW_SIZE (0);
784 int high_size = REGISTER_RAW_SIZE (1);
787 write_register_bytes (REGISTER_BYTE (0), valbuf, len);
788 else if (len <= (low_size + high_size))
790 write_register_bytes (REGISTER_BYTE (0), valbuf, low_size);
791 write_register_bytes (REGISTER_BYTE (1),
792 valbuf + low_size, len - low_size);
795 internal_error (__FILE__, __LINE__,
796 "Cannot store return value of %d bytes long.", len);
802 x86_64_register_nr2name (int reg_nr)
804 if (reg_nr < 0 || reg_nr >= X86_64_NUM_REGS)
806 return x86_64_register_info_table[reg_nr].name;
810 x86_64_register_name2nr (const char *name)
814 for (reg_nr = 0; reg_nr < X86_64_NUM_REGS; reg_nr++)
815 if (strcmp (name, x86_64_register_info_table[reg_nr].name) == 0)
822 /* We have two flavours of disassembly. The machinery on this page
823 deals with switching between those. */
826 gdb_print_insn_x86_64 (bfd_vma memaddr, disassemble_info * info)
828 if (disassembly_flavour == att_flavour)
829 return print_insn_i386_att (memaddr, info);
830 else if (disassembly_flavour == intel_flavour)
831 return print_insn_i386_intel (memaddr, info);
832 /* Never reached -- disassembly_flavour is always either att_flavour
834 internal_error (__FILE__, __LINE__, "failed internal consistency check");
838 /* Store the address of the place in which to copy the structure the
839 subroutine will return. This is called from call_function. */
841 x86_64_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
843 write_register (RDI_REGNUM, addr);
847 x86_64_frameless_function_invocation (struct frame_info *frame)
852 /* If a function with debugging information and known beginning
853 is detected, we will return pc of the next line in the source
854 code. With this approach we effectively skip the prolog. */
856 #define PROLOG_BUFSIZE 4
858 x86_64_skip_prologue (CORE_ADDR pc)
861 struct symtab_and_line v_sal;
862 struct symbol *v_function;
865 /* We will handle only functions beginning with:
867 48 89 e5 movq %rsp,%rbp
869 unsigned char prolog_expect[PROLOG_BUFSIZE] = { 0x55, 0x48, 0x89, 0xe5 },
870 prolog_buf[PROLOG_BUFSIZE];
872 read_memory (pc, (char *) prolog_buf, PROLOG_BUFSIZE);
874 /* First check, whether pc points to pushq %rbp, movq %rsp,%rbp. */
875 for (i = 0; i < PROLOG_BUFSIZE; i++)
876 if (prolog_expect[i] != prolog_buf[i])
877 return pc; /* ... no, it doesn't. Nothing to skip. */
879 /* OK, we have found the prologue and want PC of the first
880 non-prologue instruction. */
881 pc += PROLOG_BUFSIZE;
883 v_function = find_pc_function (pc);
884 v_sal = find_pc_line (pc, 0);
886 /* If pc doesn't point to a function with debuginfo,
887 some of the following may be NULL. */
888 if (!v_function || !v_function->ginfo.value.block || !v_sal.symtab)
891 endaddr = v_function->ginfo.value.block->endaddr;
893 for (i = 0; i < v_sal.symtab->linetable->nitems; i++)
894 if (v_sal.symtab->linetable->item[i].pc >= pc
895 && v_sal.symtab->linetable->item[i].pc < endaddr)
897 pc = v_sal.symtab->linetable->item[i].pc;
904 /* Sequence of bytes for breakpoint instruction. */
905 static unsigned char *
906 x86_64_breakpoint_from_pc (CORE_ADDR * pc, int *lenptr)
908 static unsigned char breakpoint[] = { 0xcc };
913 static struct gdbarch *
914 x86_64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
916 struct gdbarch *gdbarch;
917 struct gdbarch_tdep *tdep;
920 /* Find a candidate among the list of pre-declared architectures. */
921 for (arches = gdbarch_list_lookup_by_info (arches, &info);
923 arches = gdbarch_list_lookup_by_info (arches->next, &info))
925 switch (info.bfd_arch_info->mach)
927 case bfd_mach_x86_64:
928 case bfd_mach_x86_64_intel_syntax:
929 switch (gdbarch_bfd_arch_info (arches->gdbarch)->mach)
931 case bfd_mach_x86_64:
932 case bfd_mach_x86_64_intel_syntax:
933 return arches->gdbarch;
934 case bfd_mach_i386_i386:
935 case bfd_mach_i386_i8086:
936 case bfd_mach_i386_i386_intel_syntax:
939 internal_error (__FILE__, __LINE__,
940 "x86_64_gdbarch_init: unknown machine type");
943 case bfd_mach_i386_i386:
944 case bfd_mach_i386_i8086:
945 case bfd_mach_i386_i386_intel_syntax:
946 switch (gdbarch_bfd_arch_info (arches->gdbarch)->mach)
948 case bfd_mach_x86_64:
949 case bfd_mach_x86_64_intel_syntax:
951 case bfd_mach_i386_i386:
952 case bfd_mach_i386_i8086:
953 case bfd_mach_i386_i386_intel_syntax:
954 return arches->gdbarch;
956 internal_error (__FILE__, __LINE__,
957 "x86_64_gdbarch_init: unknown machine type");
961 internal_error (__FILE__, __LINE__,
962 "x86_64_gdbarch_init: unknown machine type");
966 tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep));
967 gdbarch = gdbarch_alloc (&info, tdep);
969 switch (info.bfd_arch_info->mach)
971 case bfd_mach_x86_64:
972 case bfd_mach_x86_64_intel_syntax:
973 tdep->num_xmm_regs = 16;
975 case bfd_mach_i386_i386:
976 case bfd_mach_i386_i8086:
977 case bfd_mach_i386_i386_intel_syntax:
978 /* This is place for definition of i386 target vector. */
981 internal_error (__FILE__, __LINE__,
982 "x86_64_gdbarch_init: unknown machine type");
985 set_gdbarch_long_bit (gdbarch, 64);
986 set_gdbarch_long_long_bit (gdbarch, 64);
987 set_gdbarch_ptr_bit (gdbarch, 64);
989 set_gdbarch_long_double_format (gdbarch, &floatformat_i387_ext);
991 set_gdbarch_num_regs (gdbarch, X86_64_NUM_REGS);
992 set_gdbarch_register_name (gdbarch, x86_64_register_nr2name);
993 set_gdbarch_register_size (gdbarch, 8);
994 set_gdbarch_register_raw_size (gdbarch, x86_64_register_raw_size);
995 set_gdbarch_max_register_raw_size (gdbarch, 16);
996 set_gdbarch_register_byte (gdbarch, x86_64_register_byte);
998 /* Total amount of space needed to store our copies of the machine's register
999 (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS + SIZEOF_SSE_REGS) */
1000 for (i = 0, sum = 0; i < X86_64_NUM_REGS; i++)
1001 sum += x86_64_register_info_table[i].size;
1002 set_gdbarch_register_bytes (gdbarch, sum);
1003 set_gdbarch_register_virtual_size (gdbarch, generic_register_size);
1004 set_gdbarch_max_register_virtual_size (gdbarch, 16);
1006 set_gdbarch_register_virtual_type (gdbarch, x86_64_register_virtual_type);
1008 set_gdbarch_register_convertible (gdbarch, x86_64_register_convertible);
1009 set_gdbarch_register_convert_to_virtual (gdbarch,
1010 x86_64_register_convert_to_virtual);
1011 set_gdbarch_register_convert_to_raw (gdbarch,
1012 x86_64_register_convert_to_raw);
1014 /* Register numbers of various important registers. */
1015 set_gdbarch_sp_regnum (gdbarch, 7); /* (rsp) Contains address of top of stack. */
1016 set_gdbarch_fp_regnum (gdbarch, 6); /* (rbp) */
1017 set_gdbarch_pc_regnum (gdbarch, 16); /* (rip) Contains program counter. */
1019 set_gdbarch_fp0_regnum (gdbarch, X86_64_NUM_GREGS); /* First FPU floating-point register. */
1021 set_gdbarch_read_fp (gdbarch, cfi_read_fp);
1023 /* Discard from the stack the innermost frame, restoring all registers. */
1024 set_gdbarch_pop_frame (gdbarch, x86_64_pop_frame);
1026 /* FRAME_CHAIN takes a frame's nominal address and produces the frame's
1028 set_gdbarch_frame_chain (gdbarch, cfi_frame_chain);
1030 set_gdbarch_frameless_function_invocation (gdbarch,
1031 x86_64_frameless_function_invocation);
1032 set_gdbarch_frame_saved_pc (gdbarch, x86_64_linux_frame_saved_pc);
1034 set_gdbarch_frame_args_address (gdbarch, default_frame_address);
1035 set_gdbarch_frame_locals_address (gdbarch, default_frame_address);
1037 /* Return number of bytes at start of arglist that are not really args. */
1038 set_gdbarch_frame_args_skip (gdbarch, 8);
1040 set_gdbarch_frame_init_saved_regs (gdbarch, x86_64_frame_init_saved_regs);
1042 /* Frame pc initialization is handled by unwind informations. */
1043 set_gdbarch_init_frame_pc (gdbarch, cfi_init_frame_pc);
1045 /* Initialization of unwind informations. */
1046 set_gdbarch_init_extra_frame_info (gdbarch, cfi_init_extra_frame_info);
1048 /* Getting saved registers is handled by unwind informations. */
1049 set_gdbarch_get_saved_register (gdbarch, cfi_get_saved_register);
1051 set_gdbarch_frame_init_saved_regs (gdbarch, x86_64_frame_init_saved_regs);
1053 /* Cons up virtual frame pointer for trace */
1054 set_gdbarch_virtual_frame_pointer (gdbarch, cfi_virtual_frame_pointer);
1057 set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid);
1059 set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
1060 set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
1061 set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
1062 set_gdbarch_call_dummy_length (gdbarch, 0);
1063 set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
1064 set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
1065 set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_at_entry_point);
1066 set_gdbarch_call_dummy_words (gdbarch, 0);
1067 set_gdbarch_sizeof_call_dummy_words (gdbarch, 0);
1068 set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
1069 set_gdbarch_call_dummy_p (gdbarch, 1);
1070 set_gdbarch_call_dummy_start_offset (gdbarch, 0);
1071 set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
1072 set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
1073 set_gdbarch_push_return_address (gdbarch, x86_64_push_return_address);
1074 set_gdbarch_push_arguments (gdbarch, x86_64_push_arguments);
1076 /* Return number of args passed to a frame, no way to tell. */
1077 set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
1078 /* Don't use default structure extract routine */
1079 set_gdbarch_deprecated_extract_struct_value_address (gdbarch, 0);
1081 /* If USE_STRUCT_CONVENTION retruns 0, then gdb uses STORE_RETURN_VALUE
1082 and EXTRACT_RETURN_VALUE to store/fetch the functions return value. It is
1083 the case when structure is returned in registers. */
1084 set_gdbarch_use_struct_convention (gdbarch, x86_64_use_struct_convention);
1086 /* Store the address of the place in which to copy the structure the
1087 subroutine will return. This is called from call_function. */
1088 set_gdbarch_store_struct_return (gdbarch, x86_64_store_struct_return);
1090 /* Extract from an array REGBUF containing the (raw) register state
1091 a function return value of type TYPE, and copy that, in virtual format,
1093 set_gdbarch_deprecated_extract_return_value (gdbarch, x86_64_extract_return_value);
1096 /* Write into the appropriate registers a function return value stored
1097 in VALBUF of type TYPE, given in virtual format. */
1098 set_gdbarch_store_return_value (gdbarch, x86_64_store_return_value);
1101 /* Offset from address of function to start of its code. */
1102 set_gdbarch_function_start_offset (gdbarch, 0);
1104 set_gdbarch_skip_prologue (gdbarch, x86_64_skip_prologue);
1106 set_gdbarch_saved_pc_after_call (gdbarch, x86_64_linux_saved_pc_after_call);
1108 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1110 set_gdbarch_breakpoint_from_pc (gdbarch,
1111 (gdbarch_breakpoint_from_pc_ftype *)
1112 x86_64_breakpoint_from_pc);
1115 /* Amount PC must be decremented by after a breakpoint. This is often the
1116 number of bytes in BREAKPOINT but not always. */
1117 set_gdbarch_decr_pc_after_break (gdbarch, 1);
1119 /* Use dwarf2 debug frame informations. */
1120 set_gdbarch_dwarf2_build_frame_info (gdbarch, dwarf2_build_frame_info);
1121 set_gdbarch_dwarf2_reg_to_regnum (gdbarch, x86_64_dwarf2_reg_to_regnum);
1127 _initialize_x86_64_tdep (void)
1129 register_gdbarch_init (bfd_arch_i386, x86_64_gdbarch_init);
1131 /* Initialize the table saying where each register starts in the
1137 for (i = 0; i < X86_64_NUM_REGS; i++)
1139 x86_64_register_byte_table[i] = offset;
1140 offset += x86_64_register_info_table[i].size;
1144 tm_print_insn = gdb_print_insn_x86_64;
1145 tm_print_insn_info.mach = bfd_lookup_arch (bfd_arch_i386, 3)->mach;
1147 /* Add the variable that controls the disassembly flavour. */
1149 struct cmd_list_element *new_cmd;
1151 new_cmd = add_set_enum_cmd ("disassembly-flavour", no_class,
1152 valid_flavours, &disassembly_flavour, "\
1153 Set the disassembly flavour, the valid values are \"att\" and \"intel\", \
1154 and the default value is \"att\".", &setlist);
1155 add_show_from_set (new_cmd, &showlist);