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
; ++j
)
377 int num
= classify_argument (type
->fields
[j
].type
,
379 (type
->fields
[j
].loc
.bitpos
380 + bit_offset
) % 256);
383 for (i
= 0; i
< num
; i
++)
386 (type
->fields
[j
].loc
.bitpos
+ bit_offset
) / 8 / 8;
388 merge_classes (subclasses
[i
], classes
[i
+ pos
]);
393 case TYPE_CODE_ARRAY
:
397 num
= classify_argument (type
->target_type
,
398 subclasses
, bit_offset
);
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
;
408 for (i
= 0; i
< words
; i
++)
409 classes
[i
] = subclasses
[i
% num
];
412 case TYPE_CODE_UNION
:
416 for (j
= 0; j
< type
->nfields
; ++j
)
419 num
= classify_argument (type
->fields
[j
].type
,
420 subclasses
, bit_offset
);
423 for (i
= 0; i
< num
; i
++)
424 classes
[i
] = merge_classes (subclasses
[i
], classes
[i
]);
430 /* Final merger cleanup. */
431 for (i
= 0; i
< words
; i
++)
433 /* If one class is MEMORY, everything should be passed in
435 if (classes
[i
] == X86_64_MEMORY_CLASS
)
438 /* The X86_64_SSEUP_CLASS should be always preceeded by
440 if (classes
[i
] == X86_64_SSEUP_CLASS
441 && (i
== 0 || classes
[i
- 1] != X86_64_SSE_CLASS
))
442 classes
[i
] = X86_64_SSE_CLASS
;
444 /* X86_64_X87UP_CLASS should be preceeded by X86_64_X87_CLASS. */
445 if (classes
[i
] == X86_64_X87UP_CLASS
446 && (i
== 0 || classes
[i
- 1] != X86_64_X87_CLASS
))
447 classes
[i
] = X86_64_SSE_CLASS
;
456 if (!(bit_offset
% 64))
457 classes
[0] = X86_64_SSESF_CLASS
;
459 classes
[0] = X86_64_SSE_CLASS
;
462 classes
[0] = X86_64_SSEDF_CLASS
;
465 classes
[0] = X86_64_X87_CLASS
;
466 classes
[1] = X86_64_X87UP_CLASS
;
478 if (bytes
* 8 + bit_offset
<= 32)
479 classes
[0] = X86_64_INTEGERSI_CLASS
;
481 classes
[0] = X86_64_INTEGER_CLASS
;
484 classes
[0] = classes
[1] = X86_64_INTEGER_CLASS
;
492 internal_error (__FILE__
, __LINE__
,
493 "classify_argument: unknown argument type");
496 /* Examine the argument and return set number of register required in each
497 class. Return 0 ifif parameter should be passed in memory. */
500 examine_argument (enum x86_64_reg_class classes
[MAX_CLASSES
],
501 int n
, int *int_nregs
, int *sse_nregs
)
507 for (n
--; n
>= 0; n
--)
510 case X86_64_INTEGER_CLASS
:
511 case X86_64_INTEGERSI_CLASS
:
514 case X86_64_SSE_CLASS
:
515 case X86_64_SSESF_CLASS
:
516 case X86_64_SSEDF_CLASS
:
519 case X86_64_NO_CLASS
:
520 case X86_64_SSEUP_CLASS
:
521 case X86_64_X87_CLASS
:
522 case X86_64_X87UP_CLASS
:
524 case X86_64_MEMORY_CLASS
:
525 internal_error (__FILE__
, __LINE__
,
526 "examine_argument: unexpected memory class");
531 #define RET_INT_REGS 2
532 #define RET_SSE_REGS 2
534 /* Check if the structure in value_type is returned in registers or in
535 memory. If this function returns 1, gdb will call STORE_STRUCT_RETURN and
536 EXTRACT_STRUCT_VALUE_ADDRESS else STORE_RETURN_VALUE and EXTRACT_RETURN_VALUE
539 x86_64_use_struct_convention (int gcc_p
, struct type
*value_type
)
541 enum x86_64_reg_class
class[MAX_CLASSES
];
542 int n
= classify_argument (value_type
, class, 0);
547 !examine_argument (class, n
, &needed_intregs
, &needed_sseregs
) ||
548 needed_intregs
> RET_INT_REGS
|| needed_sseregs
> RET_SSE_REGS
);
552 /* Extract from an array REGBUF containing the (raw) register state, a
553 function return value of TYPE, and copy that, in virtual format,
557 x86_64_extract_return_value (struct type
*type
, char *regbuf
, char *valbuf
)
559 enum x86_64_reg_class
class[MAX_CLASSES
];
560 int n
= classify_argument (type
, class, 0);
566 int ret_int_r
[RET_INT_REGS
] = { RAX_REGNUM
, RDX_REGNUM
};
567 int ret_sse_r
[RET_SSE_REGS
] = { XMM0_REGNUM
, XMM1_REGNUM
};
570 !examine_argument (class, n
, &needed_intregs
, &needed_sseregs
) ||
571 needed_intregs
> RET_INT_REGS
|| needed_sseregs
> RET_SSE_REGS
)
574 memcpy (&addr
, regbuf
, REGISTER_RAW_SIZE (RAX_REGNUM
));
575 read_memory (addr
, valbuf
, TYPE_LENGTH (type
));
581 for (i
= 0; i
< n
; i
++)
585 case X86_64_NO_CLASS
:
587 case X86_64_INTEGER_CLASS
:
588 memcpy (valbuf
+ offset
,
589 regbuf
+ REGISTER_BYTE (ret_int_r
[(intreg
+ 1) / 2]),
594 case X86_64_INTEGERSI_CLASS
:
595 memcpy (valbuf
+ offset
,
596 regbuf
+ REGISTER_BYTE (ret_int_r
[intreg
/ 2]), 4);
600 case X86_64_SSEDF_CLASS
:
601 case X86_64_SSESF_CLASS
:
602 case X86_64_SSE_CLASS
:
603 memcpy (valbuf
+ offset
,
604 regbuf
+ REGISTER_BYTE (ret_sse_r
[(ssereg
+ 1) / 2]),
609 case X86_64_SSEUP_CLASS
:
610 memcpy (valbuf
+ offset
+ 8,
611 regbuf
+ REGISTER_BYTE (ret_sse_r
[ssereg
/ 2]), 8);
615 case X86_64_X87_CLASS
:
616 memcpy (valbuf
+ offset
, regbuf
+ REGISTER_BYTE (FP0_REGNUM
),
620 case X86_64_X87UP_CLASS
:
621 memcpy (valbuf
+ offset
,
622 regbuf
+ REGISTER_BYTE (FP0_REGNUM
) + 8, 8);
625 case X86_64_MEMORY_CLASS
:
627 internal_error (__FILE__
, __LINE__
,
628 "Unexpected argument class");
634 /* Handled by unwind informations. */
636 x86_64_frame_init_saved_regs (struct frame_info
*fi
)
644 x86_64_push_arguments (int nargs
, struct value
**args
, CORE_ADDR sp
,
645 int struct_return
, CORE_ADDR struct_addr
)
650 static int int_parameter_registers
[INT_REGS
] = {
651 5 /* RDI */ , 4 /* RSI */ ,
652 3 /* RDX */ , 2 /* RCX */ ,
653 8 /* R8 */ , 9 /* R9 */
656 static int sse_parameter_registers
[SSE_REGS
] = {
657 XMM1_REGNUM
- 1, XMM1_REGNUM
, XMM1_REGNUM
+ 1, XMM1_REGNUM
+ 2,
658 XMM1_REGNUM
+ 3, XMM1_REGNUM
+ 4, XMM1_REGNUM
+ 5, XMM1_REGNUM
+ 6,
659 XMM1_REGNUM
+ 7, XMM1_REGNUM
+ 8, XMM1_REGNUM
+ 9, XMM1_REGNUM
+ 10,
660 XMM1_REGNUM
+ 11, XMM1_REGNUM
+ 12, XMM1_REGNUM
+ 13, XMM1_REGNUM
+ 14
662 int stack_values_count
= 0;
664 stack_values
= alloca (nargs
* sizeof (int));
665 for (i
= 0; i
< nargs
; i
++)
667 enum x86_64_reg_class
class[MAX_CLASSES
];
668 int n
= classify_argument (args
[i
]->type
, class, 0);
673 !examine_argument (class, n
, &needed_intregs
, &needed_sseregs
)
674 || intreg
/ 2 + needed_intregs
> INT_REGS
675 || ssereg
/ 2 + needed_sseregs
> SSE_REGS
)
677 stack_values
[stack_values_count
++] = i
;
682 for (j
= 0; j
< n
; j
++)
687 case X86_64_NO_CLASS
:
689 case X86_64_INTEGER_CLASS
:
690 write_register_gen (int_parameter_registers
692 VALUE_CONTENTS_ALL (args
[i
]) + offset
);
696 case X86_64_INTEGERSI_CLASS
:
697 write_register_gen (int_parameter_registers
[intreg
/ 2],
698 VALUE_CONTENTS_ALL (args
[i
]) + offset
);
702 case X86_64_SSEDF_CLASS
:
703 case X86_64_SSESF_CLASS
:
704 case X86_64_SSE_CLASS
:
705 write_register_gen (sse_parameter_registers
707 VALUE_CONTENTS_ALL (args
[i
]) + offset
);
711 case X86_64_SSEUP_CLASS
:
712 write_register_gen (sse_parameter_registers
[ssereg
/ 2],
713 VALUE_CONTENTS_ALL (args
[i
]) + offset
);
717 case X86_64_X87_CLASS
:
718 case X86_64_MEMORY_CLASS
:
719 stack_values
[stack_values_count
++] = i
;
721 case X86_64_X87UP_CLASS
:
724 internal_error (__FILE__
, __LINE__
,
725 "Unexpected argument class");
727 intreg
+= intreg
% 2;
728 ssereg
+= ssereg
% 2;
732 while (--stack_values_count
>= 0)
734 struct value
*arg
= args
[stack_values
[stack_values_count
]];
735 int len
= TYPE_LENGTH (VALUE_ENCLOSING_TYPE (arg
));
739 write_memory (sp
, VALUE_CONTENTS_ALL (arg
), len
);
744 /* Write into the appropriate registers a function return value stored
745 in VALBUF of type TYPE, given in virtual format. */
747 x86_64_store_return_value (struct type
*type
, char *valbuf
)
749 int len
= TYPE_LENGTH (type
);
751 if (TYPE_CODE_FLT
== TYPE_CODE (type
))
753 /* Floating-point return values can be found in %st(0). */
754 if (len
== TARGET_LONG_DOUBLE_BIT
/ TARGET_CHAR_BIT
755 && TARGET_LONG_DOUBLE_FORMAT
== &floatformat_i387_ext
)
757 /* Copy straight over. */
758 write_register_bytes (REGISTER_BYTE (FP0_REGNUM
), valbuf
,
763 char buf
[FPU_REG_RAW_SIZE
];
766 /* Convert the value found in VALBUF to the extended
767 floating point format used by the FPU. This is probably
768 not exactly how it would happen on the target itself, but
769 it is the best we can do. */
770 val
= extract_floating (valbuf
, TYPE_LENGTH (type
));
771 floatformat_from_doublest (&floatformat_i387_ext
, &val
, buf
);
772 write_register_bytes (REGISTER_BYTE (FP0_REGNUM
), buf
,
778 int low_size
= REGISTER_RAW_SIZE (0);
779 int high_size
= REGISTER_RAW_SIZE (1);
782 write_register_bytes (REGISTER_BYTE (0), valbuf
, len
);
783 else if (len
<= (low_size
+ high_size
))
785 write_register_bytes (REGISTER_BYTE (0), valbuf
, low_size
);
786 write_register_bytes (REGISTER_BYTE (1),
787 valbuf
+ low_size
, len
- low_size
);
790 internal_error (__FILE__
, __LINE__
,
791 "Cannot store return value of %d bytes long.", len
);
797 x86_64_register_name (int reg_nr
)
799 if (reg_nr
< 0 || reg_nr
>= X86_64_NUM_REGS
)
801 return x86_64_register_info_table
[reg_nr
].name
;
806 /* We have two flavours of disassembly. The machinery on this page
807 deals with switching between those. */
810 gdb_print_insn_x86_64 (bfd_vma memaddr
, disassemble_info
* info
)
812 if (disassembly_flavour
== att_flavour
)
813 return print_insn_i386_att (memaddr
, info
);
814 else if (disassembly_flavour
== intel_flavour
)
815 return print_insn_i386_intel (memaddr
, info
);
816 /* Never reached -- disassembly_flavour is always either att_flavour
818 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
822 /* Store the address of the place in which to copy the structure the
823 subroutine will return. This is called from call_function. */
825 x86_64_store_struct_return (CORE_ADDR addr
, CORE_ADDR sp
)
827 write_register (RDI_REGNUM
, addr
);
831 x86_64_frameless_function_invocation (struct frame_info
*frame
)
836 /* If a function with debugging information and known beginning
837 is detected, we will return pc of the next line in the source
838 code. With this approach we effectively skip the prolog. */
840 #define PROLOG_BUFSIZE 4
842 x86_64_skip_prologue (CORE_ADDR pc
)
844 int i
, firstline
, currline
;
845 struct symtab_and_line v_sal
;
846 struct symbol
*v_function
;
847 CORE_ADDR salendaddr
= 0, endaddr
= 0;
849 /* We will handle only functions beginning with:
851 48 89 e5 movq %rsp,%rbp
853 unsigned char prolog_expect
[PROLOG_BUFSIZE
] = { 0x55, 0x48, 0x89, 0xe5 },
854 prolog_buf
[PROLOG_BUFSIZE
];
856 read_memory (pc
, (char *) prolog_buf
, PROLOG_BUFSIZE
);
858 /* First check, whether pc points to pushq %rbp. If not,
859 * print a recommendation to enable frame pointer. */
860 if (prolog_expect
[0] != prolog_buf
[0])
862 if (!omit_fp_note_printed
)
865 ("NOTE: This function doesn't seem to have a valid prologue.\n"
866 " Consider adding -fno-omit-frame-pointer to your gcc's CFLAGS.\n");
867 omit_fp_note_printed
++;
871 /* Valid prolog continues with movq %rsp,%rbp. */
872 for (i
= 1; i
< PROLOG_BUFSIZE
; i
++)
873 if (prolog_expect
[i
] != prolog_buf
[i
])
874 return pc
+ 1; /* First instruction after pushq %rbp. */
876 v_function
= find_pc_function (pc
);
877 v_sal
= find_pc_line (pc
, 0);
879 /* If pc doesn't point to a function with debuginfo,
880 some of the following may be NULL. */
881 if (!v_function
|| !v_function
->ginfo
.value
.block
|| !v_sal
.symtab
)
884 firstline
= v_sal
.line
;
885 currline
= firstline
;
886 salendaddr
= v_sal
.end
;
887 endaddr
= v_function
->ginfo
.value
.block
->endaddr
;
889 for (i
= 0; i
< v_sal
.symtab
->linetable
->nitems
; i
++)
890 if (v_sal
.symtab
->linetable
->item
[i
].line
> firstline
891 && v_sal
.symtab
->linetable
->item
[i
].pc
>= salendaddr
892 && v_sal
.symtab
->linetable
->item
[i
].pc
< endaddr
)
894 pc
= v_sal
.symtab
->linetable
->item
[i
].pc
;
895 currline
= v_sal
.symtab
->linetable
->item
[i
].line
;
902 /* Sequence of bytes for breakpoint instruction. */
903 static unsigned char *
904 x86_64_breakpoint_from_pc (CORE_ADDR
* pc
, int *lenptr
)
906 static unsigned char breakpoint
[] = { 0xcc };
911 static struct gdbarch
*
912 x86_64_gdbarch_init (struct gdbarch_info info
, struct gdbarch_list
*arches
)
914 struct gdbarch
*gdbarch
;
915 struct gdbarch_tdep
*tdep
;
918 /* Find a candidate among the list of pre-declared architectures. */
919 for (arches
= gdbarch_list_lookup_by_info (arches
, &info
);
921 arches
= gdbarch_list_lookup_by_info (arches
->next
, &info
))
923 switch (info
.bfd_arch_info
->mach
)
925 case bfd_mach_x86_64
:
926 case bfd_mach_x86_64_intel_syntax
:
927 switch (gdbarch_bfd_arch_info (arches
->gdbarch
)->mach
)
929 case bfd_mach_x86_64
:
930 case bfd_mach_x86_64_intel_syntax
:
931 return arches
->gdbarch
;
932 case bfd_mach_i386_i386
:
933 case bfd_mach_i386_i8086
:
934 case bfd_mach_i386_i386_intel_syntax
:
937 internal_error (__FILE__
, __LINE__
,
938 "x86_64_gdbarch_init: unknown machine type");
941 case bfd_mach_i386_i386
:
942 case bfd_mach_i386_i8086
:
943 case bfd_mach_i386_i386_intel_syntax
:
944 switch (gdbarch_bfd_arch_info (arches
->gdbarch
)->mach
)
946 case bfd_mach_x86_64
:
947 case bfd_mach_x86_64_intel_syntax
:
949 case bfd_mach_i386_i386
:
950 case bfd_mach_i386_i8086
:
951 case bfd_mach_i386_i386_intel_syntax
:
952 return arches
->gdbarch
;
954 internal_error (__FILE__
, __LINE__
,
955 "x86_64_gdbarch_init: unknown machine type");
959 internal_error (__FILE__
, __LINE__
,
960 "x86_64_gdbarch_init: unknown machine type");
964 tdep
= (struct gdbarch_tdep
*) xmalloc (sizeof (struct gdbarch_tdep
));
965 gdbarch
= gdbarch_alloc (&info
, tdep
);
967 switch (info
.bfd_arch_info
->mach
)
969 case bfd_mach_x86_64
:
970 case bfd_mach_x86_64_intel_syntax
:
971 tdep
->num_xmm_regs
= 16;
973 case bfd_mach_i386_i386
:
974 case bfd_mach_i386_i8086
:
975 case bfd_mach_i386_i386_intel_syntax
:
976 /* This is place for definition of i386 target vector. */
979 internal_error (__FILE__
, __LINE__
,
980 "x86_64_gdbarch_init: unknown machine type");
983 set_gdbarch_long_bit (gdbarch
, 64);
984 set_gdbarch_long_long_bit (gdbarch
, 64);
985 set_gdbarch_ptr_bit (gdbarch
, 64);
987 set_gdbarch_long_double_format (gdbarch
, &floatformat_i387_ext
);
989 set_gdbarch_num_regs (gdbarch
, X86_64_NUM_REGS
);
990 set_gdbarch_register_name (gdbarch
, x86_64_register_name
);
991 set_gdbarch_register_size (gdbarch
, 8);
992 set_gdbarch_register_raw_size (gdbarch
, x86_64_register_raw_size
);
993 set_gdbarch_max_register_raw_size (gdbarch
, 16);
994 set_gdbarch_register_byte (gdbarch
, x86_64_register_byte
);
996 /* Total amount of space needed to store our copies of the machine's register
997 (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS + SIZEOF_SSE_REGS) */
998 for (i
= 0, sum
= 0; i
< X86_64_NUM_REGS
; i
++)
999 sum
+= x86_64_register_info_table
[i
].size
;
1000 set_gdbarch_register_bytes (gdbarch
, sum
);
1001 set_gdbarch_register_virtual_size (gdbarch
, generic_register_virtual_size
);
1002 set_gdbarch_max_register_virtual_size (gdbarch
, 16);
1004 set_gdbarch_register_virtual_type (gdbarch
, x86_64_register_virtual_type
);
1006 set_gdbarch_register_convertible (gdbarch
, x86_64_register_convertible
);
1007 set_gdbarch_register_convert_to_virtual (gdbarch
,
1008 x86_64_register_convert_to_virtual
);
1009 set_gdbarch_register_convert_to_raw (gdbarch
,
1010 x86_64_register_convert_to_raw
);
1012 /* Register numbers of various important registers. */
1013 set_gdbarch_sp_regnum (gdbarch
, 7); /* (rsp) Contains address of top of stack. */
1014 set_gdbarch_fp_regnum (gdbarch
, 6); /* (rbp) */
1015 set_gdbarch_pc_regnum (gdbarch
, 16); /* (rip) Contains program counter. */
1017 set_gdbarch_fp0_regnum (gdbarch
, X86_64_NUM_GREGS
); /* First FPU floating-point register. */
1019 set_gdbarch_read_fp (gdbarch
, cfi_read_fp
);
1021 /* Discard from the stack the innermost frame, restoring all registers. */
1022 set_gdbarch_pop_frame (gdbarch
, x86_64_pop_frame
);
1024 /* FRAME_CHAIN takes a frame's nominal address and produces the frame's
1026 set_gdbarch_frame_chain (gdbarch
, cfi_frame_chain
);
1028 set_gdbarch_frameless_function_invocation (gdbarch
,
1029 x86_64_frameless_function_invocation
);
1030 set_gdbarch_frame_saved_pc (gdbarch
, x86_64_linux_frame_saved_pc
);
1032 set_gdbarch_frame_args_address (gdbarch
, default_frame_address
);
1033 set_gdbarch_frame_locals_address (gdbarch
, default_frame_address
);
1035 /* Return number of bytes at start of arglist that are not really args. */
1036 set_gdbarch_frame_args_skip (gdbarch
, 8);
1038 set_gdbarch_frame_init_saved_regs (gdbarch
, x86_64_frame_init_saved_regs
);
1040 /* Frame pc initialization is handled by unwind informations. */
1041 set_gdbarch_init_frame_pc (gdbarch
, cfi_init_frame_pc
);
1043 /* Initialization of unwind informations. */
1044 set_gdbarch_init_extra_frame_info (gdbarch
, cfi_init_extra_frame_info
);
1046 /* Getting saved registers is handled by unwind informations. */
1047 set_gdbarch_get_saved_register (gdbarch
, cfi_get_saved_register
);
1049 set_gdbarch_frame_init_saved_regs (gdbarch
, x86_64_frame_init_saved_regs
);
1051 /* Cons up virtual frame pointer for trace */
1052 set_gdbarch_virtual_frame_pointer (gdbarch
, cfi_virtual_frame_pointer
);
1055 set_gdbarch_frame_chain_valid (gdbarch
, generic_file_frame_chain_valid
);
1057 set_gdbarch_use_generic_dummy_frames (gdbarch
, 1);
1058 set_gdbarch_call_dummy_location (gdbarch
, AT_ENTRY_POINT
);
1059 set_gdbarch_call_dummy_address (gdbarch
, entry_point_address
);
1060 set_gdbarch_call_dummy_length (gdbarch
, 0);
1061 set_gdbarch_call_dummy_breakpoint_offset (gdbarch
, 0);
1062 set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch
, 1);
1063 set_gdbarch_pc_in_call_dummy (gdbarch
, pc_in_call_dummy_at_entry_point
);
1064 set_gdbarch_call_dummy_words (gdbarch
, 0);
1065 set_gdbarch_sizeof_call_dummy_words (gdbarch
, 0);
1066 set_gdbarch_call_dummy_stack_adjust_p (gdbarch
, 0);
1067 set_gdbarch_call_dummy_p (gdbarch
, 1);
1068 set_gdbarch_call_dummy_start_offset (gdbarch
, 0);
1069 set_gdbarch_push_dummy_frame (gdbarch
, generic_push_dummy_frame
);
1070 set_gdbarch_fix_call_dummy (gdbarch
, generic_fix_call_dummy
);
1071 set_gdbarch_push_return_address (gdbarch
, x86_64_push_return_address
);
1072 set_gdbarch_push_arguments (gdbarch
, x86_64_push_arguments
);
1074 /* Return number of args passed to a frame, no way to tell. */
1075 set_gdbarch_frame_num_args (gdbarch
, frame_num_args_unknown
);
1076 /* Don't use default structure extract routine */
1077 set_gdbarch_extract_struct_value_address (gdbarch
, 0);
1079 /* If USE_STRUCT_CONVENTION retruns 0, then gdb uses STORE_RETURN_VALUE
1080 and EXTRACT_RETURN_VALUE to store/fetch the functions return value. It is
1081 the case when structure is returned in registers. */
1082 set_gdbarch_use_struct_convention (gdbarch
, x86_64_use_struct_convention
);
1084 /* Store the address of the place in which to copy the structure the
1085 subroutine will return. This is called from call_function. */
1086 set_gdbarch_store_struct_return (gdbarch
, x86_64_store_struct_return
);
1088 /* Extract from an array REGBUF containing the (raw) register state
1089 a function return value of type TYPE, and copy that, in virtual format,
1091 set_gdbarch_extract_return_value (gdbarch
, x86_64_extract_return_value
);
1094 /* Write into the appropriate registers a function return value stored
1095 in VALBUF of type TYPE, given in virtual format. */
1096 set_gdbarch_store_return_value (gdbarch
, x86_64_store_return_value
);
1099 /* Offset from address of function to start of its code. */
1100 set_gdbarch_function_start_offset (gdbarch
, 0);
1102 set_gdbarch_skip_prologue (gdbarch
, x86_64_skip_prologue
);
1104 set_gdbarch_saved_pc_after_call (gdbarch
, x86_64_linux_saved_pc_after_call
);
1106 set_gdbarch_inner_than (gdbarch
, core_addr_lessthan
);
1108 set_gdbarch_breakpoint_from_pc (gdbarch
,
1109 (gdbarch_breakpoint_from_pc_ftype
*)
1110 x86_64_breakpoint_from_pc
);
1113 /* Amount PC must be decremented by after a breakpoint. This is often the
1114 number of bytes in BREAKPOINT but not always. */
1115 set_gdbarch_decr_pc_after_break (gdbarch
, 1);
1117 /* Use dwarf2 debug frame informations. */
1118 set_gdbarch_dwarf2_build_frame_info (gdbarch
, dwarf2_build_frame_info
);
1119 set_gdbarch_dwarf2_reg_to_regnum (gdbarch
, x86_64_dwarf2_reg_to_regnum
);
1125 _initialize_x86_64_tdep (void)
1127 register_gdbarch_init (bfd_arch_i386
, x86_64_gdbarch_init
);
1129 /* Initialize the table saying where each register starts in the
1135 for (i
= 0; i
< X86_64_NUM_REGS
; i
++)
1137 x86_64_register_byte_table
[i
] = offset
;
1138 offset
+= x86_64_register_info_table
[i
].size
;
1142 tm_print_insn
= gdb_print_insn_x86_64
;
1143 tm_print_insn_info
.mach
= bfd_lookup_arch (bfd_arch_i386
, 3)->mach
;
1145 /* Add the variable that controls the disassembly flavour. */
1147 struct cmd_list_element
*new_cmd
;
1149 new_cmd
= add_set_enum_cmd ("disassembly-flavour", no_class
,
1150 valid_flavours
, &disassembly_flavour
, "\
1151 Set the disassembly flavour, the valid values are \"att\" and \"intel\", \
1152 and the default value is \"att\".", &setlist
);
1153 add_show_from_set (new_cmd
, &showlist
);