1 /* Cache and manage the values of registers for GDB, the GNU debugger.
3 Copyright (C) 1986-2018 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "reggroups.h"
27 #include "observable.h"
29 #include <forward_list>
34 * Here is the actual register cache.
37 /* Per-architecture object describing the layout of a register cache.
38 Computed once when the architecture is created. */
40 struct gdbarch_data
*regcache_descr_handle
;
44 /* The architecture this descriptor belongs to. */
45 struct gdbarch
*gdbarch
;
47 /* The raw register cache. Each raw (or hard) register is supplied
48 by the target interface. The raw cache should not contain
49 redundant information - if the PC is constructed from two
50 registers then those registers and not the PC lives in the raw
52 long sizeof_raw_registers
;
54 /* The cooked register space. Each cooked register in the range
55 [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw
56 register. The remaining [NR_RAW_REGISTERS
57 .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto
58 both raw registers and memory by the architecture methods
59 gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */
60 int nr_cooked_registers
;
61 long sizeof_cooked_registers
;
63 /* Offset and size (in 8 bit bytes), of each register in the
64 register cache. All registers (including those in the range
65 [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an
67 long *register_offset
;
68 long *sizeof_register
;
70 /* Cached table containing the type of each register. */
71 struct type
**register_type
;
75 init_regcache_descr (struct gdbarch
*gdbarch
)
78 struct regcache_descr
*descr
;
79 gdb_assert (gdbarch
!= NULL
);
81 /* Create an initial, zero filled, table. */
82 descr
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct regcache_descr
);
83 descr
->gdbarch
= gdbarch
;
85 /* Total size of the register space. The raw registers are mapped
86 directly onto the raw register cache while the pseudo's are
87 either mapped onto raw-registers or memory. */
88 descr
->nr_cooked_registers
= gdbarch_num_regs (gdbarch
)
89 + gdbarch_num_pseudo_regs (gdbarch
);
91 /* Fill in a table of register types. */
93 = GDBARCH_OBSTACK_CALLOC (gdbarch
, descr
->nr_cooked_registers
,
95 for (i
= 0; i
< descr
->nr_cooked_registers
; i
++)
96 descr
->register_type
[i
] = gdbarch_register_type (gdbarch
, i
);
98 /* Construct a strictly RAW register cache. Don't allow pseudo's
99 into the register cache. */
101 /* Lay out the register cache.
103 NOTE: cagney/2002-05-22: Only register_type() is used when
104 constructing the register cache. It is assumed that the
105 register's raw size, virtual size and type length are all the
111 descr
->sizeof_register
112 = GDBARCH_OBSTACK_CALLOC (gdbarch
, descr
->nr_cooked_registers
, long);
113 descr
->register_offset
114 = GDBARCH_OBSTACK_CALLOC (gdbarch
, descr
->nr_cooked_registers
, long);
115 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
117 descr
->sizeof_register
[i
] = TYPE_LENGTH (descr
->register_type
[i
]);
118 descr
->register_offset
[i
] = offset
;
119 offset
+= descr
->sizeof_register
[i
];
121 /* Set the real size of the raw register cache buffer. */
122 descr
->sizeof_raw_registers
= offset
;
124 for (; i
< descr
->nr_cooked_registers
; i
++)
126 descr
->sizeof_register
[i
] = TYPE_LENGTH (descr
->register_type
[i
]);
127 descr
->register_offset
[i
] = offset
;
128 offset
+= descr
->sizeof_register
[i
];
130 /* Set the real size of the readonly register cache buffer. */
131 descr
->sizeof_cooked_registers
= offset
;
137 static struct regcache_descr
*
138 regcache_descr (struct gdbarch
*gdbarch
)
140 return (struct regcache_descr
*) gdbarch_data (gdbarch
,
141 regcache_descr_handle
);
144 /* Utility functions returning useful register attributes stored in
145 the regcache descr. */
148 register_type (struct gdbarch
*gdbarch
, int regnum
)
150 struct regcache_descr
*descr
= regcache_descr (gdbarch
);
152 gdb_assert (regnum
>= 0 && regnum
< descr
->nr_cooked_registers
);
153 return descr
->register_type
[regnum
];
156 /* Utility functions returning useful register attributes stored in
157 the regcache descr. */
160 register_size (struct gdbarch
*gdbarch
, int regnum
)
162 struct regcache_descr
*descr
= regcache_descr (gdbarch
);
165 gdb_assert (regnum
>= 0
166 && regnum
< (gdbarch_num_regs (gdbarch
)
167 + gdbarch_num_pseudo_regs (gdbarch
)));
168 size
= descr
->sizeof_register
[regnum
];
172 /* See common/common-regcache.h. */
175 regcache_register_size (const struct regcache
*regcache
, int n
)
177 return register_size (regcache
->arch (), n
);
180 reg_buffer::reg_buffer (gdbarch
*gdbarch
, bool has_pseudo
)
181 : m_has_pseudo (has_pseudo
)
183 gdb_assert (gdbarch
!= NULL
);
184 m_descr
= regcache_descr (gdbarch
);
188 m_registers
= XCNEWVEC (gdb_byte
, m_descr
->sizeof_cooked_registers
);
189 m_register_status
= XCNEWVEC (signed char,
190 m_descr
->nr_cooked_registers
);
194 m_registers
= XCNEWVEC (gdb_byte
, m_descr
->sizeof_raw_registers
);
195 m_register_status
= XCNEWVEC (signed char, gdbarch_num_regs (gdbarch
));
199 regcache::regcache (gdbarch
*gdbarch
, const address_space
*aspace_
)
200 /* The register buffers. A read/write register cache can only hold
201 [0 .. gdbarch_num_regs). */
202 : detached_regcache (gdbarch
, false), m_aspace (aspace_
)
204 m_ptid
= minus_one_ptid
;
207 static enum register_status
208 do_cooked_read (void *src
, int regnum
, gdb_byte
*buf
)
210 struct regcache
*regcache
= (struct regcache
*) src
;
212 return regcache
->cooked_read (regnum
, buf
);
215 readonly_detached_regcache::readonly_detached_regcache (const regcache
&src
)
216 : readonly_detached_regcache (src
.arch (), do_cooked_read
, (void *) &src
)
221 reg_buffer::arch () const
223 return m_descr
->gdbarch
;
226 /* Cleanup class for invalidating a register. */
228 class regcache_invalidator
232 regcache_invalidator (struct regcache
*regcache
, int regnum
)
233 : m_regcache (regcache
),
238 ~regcache_invalidator ()
240 if (m_regcache
!= nullptr)
241 m_regcache
->invalidate (m_regnum
);
244 DISABLE_COPY_AND_ASSIGN (regcache_invalidator
);
248 m_regcache
= nullptr;
253 struct regcache
*m_regcache
;
257 /* Return a pointer to register REGNUM's buffer cache. */
260 reg_buffer::register_buffer (int regnum
) const
262 return m_registers
+ m_descr
->register_offset
[regnum
];
266 reg_buffer::save (regcache_cooked_read_ftype
*cooked_read
,
269 struct gdbarch
*gdbarch
= m_descr
->gdbarch
;
272 /* It should have pseudo registers. */
273 gdb_assert (m_has_pseudo
);
274 /* Clear the dest. */
275 memset (m_registers
, 0, m_descr
->sizeof_cooked_registers
);
276 memset (m_register_status
, 0, m_descr
->nr_cooked_registers
);
277 /* Copy over any registers (identified by their membership in the
278 save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs +
279 gdbarch_num_pseudo_regs) range is checked since some architectures need
280 to save/restore `cooked' registers that live in memory. */
281 for (regnum
= 0; regnum
< m_descr
->nr_cooked_registers
; regnum
++)
283 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, save_reggroup
))
285 gdb_byte
*dst_buf
= register_buffer (regnum
);
286 enum register_status status
= cooked_read (src
, regnum
, dst_buf
);
288 gdb_assert (status
!= REG_UNKNOWN
);
290 if (status
!= REG_VALID
)
291 memset (dst_buf
, 0, register_size (gdbarch
, regnum
));
293 m_register_status
[regnum
] = status
;
299 regcache::restore (readonly_detached_regcache
*src
)
301 struct gdbarch
*gdbarch
= m_descr
->gdbarch
;
304 gdb_assert (src
!= NULL
);
305 gdb_assert (src
->m_has_pseudo
);
307 gdb_assert (gdbarch
== src
->arch ());
309 /* Copy over any registers, being careful to only restore those that
310 were both saved and need to be restored. The full [0 .. gdbarch_num_regs
311 + gdbarch_num_pseudo_regs) range is checked since some architectures need
312 to save/restore `cooked' registers that live in memory. */
313 for (regnum
= 0; regnum
< m_descr
->nr_cooked_registers
; regnum
++)
315 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, restore_reggroup
))
317 if (src
->m_register_status
[regnum
] == REG_VALID
)
318 cooked_write (regnum
, src
->register_buffer (regnum
));
324 reg_buffer::get_register_status (int regnum
) const
326 assert_regnum (regnum
);
328 return (enum register_status
) m_register_status
[regnum
];
332 detached_regcache::invalidate (int regnum
)
334 assert_regnum (regnum
);
335 m_register_status
[regnum
] = REG_UNKNOWN
;
339 reg_buffer::assert_regnum (int regnum
) const
341 gdb_assert (regnum
>= 0);
343 gdb_assert (regnum
< m_descr
->nr_cooked_registers
);
345 gdb_assert (regnum
< gdbarch_num_regs (arch ()));
348 /* Global structure containing the current regcache. */
350 /* NOTE: this is a write-through cache. There is no "dirty" bit for
351 recording if the register values have been changed (eg. by the
352 user). Therefore all registers must be written back to the
353 target when appropriate. */
354 std::forward_list
<regcache
*> regcache::current_regcache
;
357 get_thread_arch_aspace_regcache (ptid_t ptid
, struct gdbarch
*gdbarch
,
358 struct address_space
*aspace
)
360 for (const auto ®cache
: regcache::current_regcache
)
361 if (ptid_equal (regcache
->ptid (), ptid
) && regcache
->arch () == gdbarch
)
364 regcache
*new_regcache
= new regcache (gdbarch
, aspace
);
366 regcache::current_regcache
.push_front (new_regcache
);
367 new_regcache
->set_ptid (ptid
);
373 get_thread_arch_regcache (ptid_t ptid
, struct gdbarch
*gdbarch
)
375 address_space
*aspace
= target_thread_address_space (ptid
);
377 return get_thread_arch_aspace_regcache (ptid
, gdbarch
, aspace
);
380 static ptid_t current_thread_ptid
;
381 static struct gdbarch
*current_thread_arch
;
384 get_thread_regcache (ptid_t ptid
)
386 if (!current_thread_arch
|| !ptid_equal (current_thread_ptid
, ptid
))
388 current_thread_ptid
= ptid
;
389 current_thread_arch
= target_thread_architecture (ptid
);
392 return get_thread_arch_regcache (ptid
, current_thread_arch
);
396 get_current_regcache (void)
398 return get_thread_regcache (inferior_ptid
);
401 /* See common/common-regcache.h. */
404 get_thread_regcache_for_ptid (ptid_t ptid
)
406 return get_thread_regcache (ptid
);
409 /* Observer for the target_changed event. */
412 regcache_observer_target_changed (struct target_ops
*target
)
414 registers_changed ();
417 /* Update global variables old ptids to hold NEW_PTID if they were
420 regcache::regcache_thread_ptid_changed (ptid_t old_ptid
, ptid_t new_ptid
)
422 for (auto ®cache
: regcache::current_regcache
)
424 if (ptid_equal (regcache
->ptid (), old_ptid
))
425 regcache
->set_ptid (new_ptid
);
429 /* Low level examining and depositing of registers.
431 The caller is responsible for making sure that the inferior is
432 stopped before calling the fetching routines, or it will get
433 garbage. (a change from GDB version 3, in which the caller got the
434 value from the last stop). */
436 /* REGISTERS_CHANGED ()
438 Indicate that registers may have changed, so invalidate the cache. */
441 registers_changed_ptid (ptid_t ptid
)
443 for (auto oit
= regcache::current_regcache
.before_begin (),
444 it
= std::next (oit
);
445 it
!= regcache::current_regcache
.end ();
448 if (ptid_match ((*it
)->ptid (), ptid
))
451 it
= regcache::current_regcache
.erase_after (oit
);
457 if (ptid_match (current_thread_ptid
, ptid
))
459 current_thread_ptid
= null_ptid
;
460 current_thread_arch
= NULL
;
463 if (ptid_match (inferior_ptid
, ptid
))
465 /* We just deleted the regcache of the current thread. Need to
466 forget about any frames we have cached, too. */
467 reinit_frame_cache ();
472 registers_changed (void)
474 registers_changed_ptid (minus_one_ptid
);
476 /* Force cleanup of any alloca areas if using C alloca instead of
477 a builtin alloca. This particular call is used to clean up
478 areas allocated by low level target code which may build up
479 during lengthy interactions between gdb and the target before
480 gdb gives control to the user (ie watchpoints). */
485 regcache::raw_update (int regnum
)
487 assert_regnum (regnum
);
489 /* Make certain that the register cache is up-to-date with respect
490 to the current thread. This switching shouldn't be necessary
491 only there is still only one target side register cache. Sigh!
492 On the bright side, at least there is a regcache object. */
494 if (get_register_status (regnum
) == REG_UNKNOWN
)
496 target_fetch_registers (this, regnum
);
498 /* A number of targets can't access the whole set of raw
499 registers (because the debug API provides no means to get at
501 if (m_register_status
[regnum
] == REG_UNKNOWN
)
502 m_register_status
[regnum
] = REG_UNAVAILABLE
;
507 readable_regcache::raw_read (int regnum
, gdb_byte
*buf
)
509 gdb_assert (buf
!= NULL
);
512 if (m_register_status
[regnum
] != REG_VALID
)
513 memset (buf
, 0, m_descr
->sizeof_register
[regnum
]);
515 memcpy (buf
, register_buffer (regnum
),
516 m_descr
->sizeof_register
[regnum
]);
518 return (enum register_status
) m_register_status
[regnum
];
522 regcache_raw_read_signed (struct regcache
*regcache
, int regnum
, LONGEST
*val
)
524 gdb_assert (regcache
!= NULL
);
525 return regcache
->raw_read (regnum
, val
);
528 template<typename T
, typename
>
530 readable_regcache::raw_read (int regnum
, T
*val
)
533 enum register_status status
;
535 assert_regnum (regnum
);
536 buf
= (gdb_byte
*) alloca (m_descr
->sizeof_register
[regnum
]);
537 status
= raw_read (regnum
, buf
);
538 if (status
== REG_VALID
)
539 *val
= extract_integer
<T
> (buf
,
540 m_descr
->sizeof_register
[regnum
],
541 gdbarch_byte_order (m_descr
->gdbarch
));
548 regcache_raw_read_unsigned (struct regcache
*regcache
, int regnum
,
551 gdb_assert (regcache
!= NULL
);
552 return regcache
->raw_read (regnum
, val
);
556 regcache_raw_write_signed (struct regcache
*regcache
, int regnum
, LONGEST val
)
558 gdb_assert (regcache
!= NULL
);
559 regcache
->raw_write (regnum
, val
);
562 template<typename T
, typename
>
564 regcache::raw_write (int regnum
, T val
)
568 assert_regnum (regnum
);
569 buf
= (gdb_byte
*) alloca (m_descr
->sizeof_register
[regnum
]);
570 store_integer (buf
, m_descr
->sizeof_register
[regnum
],
571 gdbarch_byte_order (m_descr
->gdbarch
), val
);
572 raw_write (regnum
, buf
);
576 regcache_raw_write_unsigned (struct regcache
*regcache
, int regnum
,
579 gdb_assert (regcache
!= NULL
);
580 regcache
->raw_write (regnum
, val
);
584 regcache_raw_get_signed (struct regcache
*regcache
, int regnum
)
587 enum register_status status
;
589 status
= regcache_raw_read_signed (regcache
, regnum
, &value
);
590 if (status
== REG_UNAVAILABLE
)
591 throw_error (NOT_AVAILABLE_ERROR
,
592 _("Register %d is not available"), regnum
);
597 readable_regcache::cooked_read (int regnum
, gdb_byte
*buf
)
599 gdb_assert (regnum
>= 0);
600 gdb_assert (regnum
< m_descr
->nr_cooked_registers
);
601 if (regnum
< num_raw_registers ())
602 return raw_read (regnum
, buf
);
603 else if (m_has_pseudo
604 && m_register_status
[regnum
] != REG_UNKNOWN
)
606 if (m_register_status
[regnum
] == REG_VALID
)
607 memcpy (buf
, register_buffer (regnum
),
608 m_descr
->sizeof_register
[regnum
]);
610 memset (buf
, 0, m_descr
->sizeof_register
[regnum
]);
612 return (enum register_status
) m_register_status
[regnum
];
614 else if (gdbarch_pseudo_register_read_value_p (m_descr
->gdbarch
))
616 struct value
*mark
, *computed
;
617 enum register_status result
= REG_VALID
;
619 mark
= value_mark ();
621 computed
= gdbarch_pseudo_register_read_value (m_descr
->gdbarch
,
623 if (value_entirely_available (computed
))
624 memcpy (buf
, value_contents_raw (computed
),
625 m_descr
->sizeof_register
[regnum
]);
628 memset (buf
, 0, m_descr
->sizeof_register
[regnum
]);
629 result
= REG_UNAVAILABLE
;
632 value_free_to_mark (mark
);
637 return gdbarch_pseudo_register_read (m_descr
->gdbarch
, this,
642 readable_regcache::cooked_read_value (int regnum
)
644 gdb_assert (regnum
>= 0);
645 gdb_assert (regnum
< m_descr
->nr_cooked_registers
);
647 if (regnum
< num_raw_registers ()
648 || (m_has_pseudo
&& m_register_status
[regnum
] != REG_UNKNOWN
)
649 || !gdbarch_pseudo_register_read_value_p (m_descr
->gdbarch
))
651 struct value
*result
;
653 result
= allocate_value (register_type (m_descr
->gdbarch
, regnum
));
654 VALUE_LVAL (result
) = lval_register
;
655 VALUE_REGNUM (result
) = regnum
;
657 /* It is more efficient in general to do this delegation in this
658 direction than in the other one, even though the value-based
660 if (cooked_read (regnum
,
661 value_contents_raw (result
)) == REG_UNAVAILABLE
)
662 mark_value_bytes_unavailable (result
, 0,
663 TYPE_LENGTH (value_type (result
)));
668 return gdbarch_pseudo_register_read_value (m_descr
->gdbarch
,
673 regcache_cooked_read_signed (struct regcache
*regcache
, int regnum
,
676 gdb_assert (regcache
!= NULL
);
677 return regcache
->cooked_read (regnum
, val
);
680 template<typename T
, typename
>
682 readable_regcache::cooked_read (int regnum
, T
*val
)
684 enum register_status status
;
687 gdb_assert (regnum
>= 0 && regnum
< m_descr
->nr_cooked_registers
);
688 buf
= (gdb_byte
*) alloca (m_descr
->sizeof_register
[regnum
]);
689 status
= cooked_read (regnum
, buf
);
690 if (status
== REG_VALID
)
691 *val
= extract_integer
<T
> (buf
, m_descr
->sizeof_register
[regnum
],
692 gdbarch_byte_order (m_descr
->gdbarch
));
699 regcache_cooked_read_unsigned (struct regcache
*regcache
, int regnum
,
702 gdb_assert (regcache
!= NULL
);
703 return regcache
->cooked_read (regnum
, val
);
707 regcache_cooked_write_signed (struct regcache
*regcache
, int regnum
,
710 gdb_assert (regcache
!= NULL
);
711 regcache
->cooked_write (regnum
, val
);
714 template<typename T
, typename
>
716 regcache::cooked_write (int regnum
, T val
)
720 gdb_assert (regnum
>=0 && regnum
< m_descr
->nr_cooked_registers
);
721 buf
= (gdb_byte
*) alloca (m_descr
->sizeof_register
[regnum
]);
722 store_integer (buf
, m_descr
->sizeof_register
[regnum
],
723 gdbarch_byte_order (m_descr
->gdbarch
), val
);
724 cooked_write (regnum
, buf
);
728 regcache_cooked_write_unsigned (struct regcache
*regcache
, int regnum
,
731 gdb_assert (regcache
!= NULL
);
732 regcache
->cooked_write (regnum
, val
);
736 regcache::raw_write (int regnum
, const gdb_byte
*buf
)
739 gdb_assert (buf
!= NULL
);
740 assert_regnum (regnum
);
742 /* On the sparc, writing %g0 is a no-op, so we don't even want to
743 change the registers array if something writes to this register. */
744 if (gdbarch_cannot_store_register (arch (), regnum
))
747 /* If we have a valid copy of the register, and new value == old
748 value, then don't bother doing the actual store. */
749 if (get_register_status (regnum
) == REG_VALID
750 && (memcmp (register_buffer (regnum
), buf
,
751 m_descr
->sizeof_register
[regnum
]) == 0))
754 target_prepare_to_store (this);
755 raw_supply (regnum
, buf
);
757 /* Invalidate the register after it is written, in case of a
759 regcache_invalidator
invalidator (this, regnum
);
761 target_store_registers (this, regnum
);
763 /* The target did not throw an error so we can discard invalidating
765 invalidator
.release ();
769 regcache::cooked_write (int regnum
, const gdb_byte
*buf
)
771 gdb_assert (regnum
>= 0);
772 gdb_assert (regnum
< m_descr
->nr_cooked_registers
);
773 if (regnum
< num_raw_registers ())
774 raw_write (regnum
, buf
);
776 gdbarch_pseudo_register_write (m_descr
->gdbarch
, this,
780 /* Perform a partial register transfer using a read, modify, write
784 readable_regcache::read_part (int regnum
, int offset
, int len
, void *in
,
787 struct gdbarch
*gdbarch
= arch ();
788 gdb_byte
*reg
= (gdb_byte
*) alloca (register_size (gdbarch
, regnum
));
790 gdb_assert (in
!= NULL
);
791 gdb_assert (offset
>= 0 && offset
<= m_descr
->sizeof_register
[regnum
]);
792 gdb_assert (len
>= 0 && offset
+ len
<= m_descr
->sizeof_register
[regnum
]);
793 /* Something to do? */
794 if (offset
+ len
== 0)
796 /* Read (when needed) ... */
797 enum register_status status
;
800 status
= raw_read (regnum
, reg
);
802 status
= cooked_read (regnum
, reg
);
803 if (status
!= REG_VALID
)
807 memcpy (in
, reg
+ offset
, len
);
813 regcache::write_part (int regnum
, int offset
, int len
,
814 const void *out
, bool is_raw
)
816 struct gdbarch
*gdbarch
= arch ();
817 gdb_byte
*reg
= (gdb_byte
*) alloca (register_size (gdbarch
, regnum
));
819 gdb_assert (out
!= NULL
);
820 gdb_assert (offset
>= 0 && offset
<= m_descr
->sizeof_register
[regnum
]);
821 gdb_assert (len
>= 0 && offset
+ len
<= m_descr
->sizeof_register
[regnum
]);
822 /* Something to do? */
823 if (offset
+ len
== 0)
825 /* Read (when needed) ... */
827 || offset
+ len
< m_descr
->sizeof_register
[regnum
])
829 enum register_status status
;
832 status
= raw_read (regnum
, reg
);
834 status
= cooked_read (regnum
, reg
);
835 if (status
!= REG_VALID
)
839 memcpy (reg
+ offset
, out
, len
);
840 /* ... write (when needed). */
842 raw_write (regnum
, reg
);
844 cooked_write (regnum
, reg
);
850 readable_regcache::raw_read_part (int regnum
, int offset
, int len
, gdb_byte
*buf
)
852 assert_regnum (regnum
);
853 return read_part (regnum
, offset
, len
, buf
, true);
856 /* See regcache.h. */
859 regcache::raw_write_part (int regnum
, int offset
, int len
,
862 assert_regnum (regnum
);
863 write_part (regnum
, offset
, len
, buf
, true);
867 regcache_cooked_read_part (struct regcache
*regcache
, int regnum
,
868 int offset
, int len
, gdb_byte
*buf
)
870 return regcache
->cooked_read_part (regnum
, offset
, len
, buf
);
875 readable_regcache::cooked_read_part (int regnum
, int offset
, int len
,
878 gdb_assert (regnum
>= 0 && regnum
< m_descr
->nr_cooked_registers
);
879 return read_part (regnum
, offset
, len
, buf
, false);
883 regcache_cooked_write_part (struct regcache
*regcache
, int regnum
,
884 int offset
, int len
, const gdb_byte
*buf
)
886 regcache
->cooked_write_part (regnum
, offset
, len
, buf
);
890 regcache::cooked_write_part (int regnum
, int offset
, int len
,
893 gdb_assert (regnum
>= 0 && regnum
< m_descr
->nr_cooked_registers
);
894 write_part (regnum
, offset
, len
, buf
, false);
897 /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */
900 regcache_raw_supply (struct regcache
*regcache
, int regnum
, const void *buf
)
902 gdb_assert (regcache
!= NULL
);
903 regcache
->raw_supply (regnum
, buf
);
907 detached_regcache::raw_supply (int regnum
, const void *buf
)
912 assert_regnum (regnum
);
914 regbuf
= register_buffer (regnum
);
915 size
= m_descr
->sizeof_register
[regnum
];
919 memcpy (regbuf
, buf
, size
);
920 m_register_status
[regnum
] = REG_VALID
;
924 /* This memset not strictly necessary, but better than garbage
925 in case the register value manages to escape somewhere (due
926 to a bug, no less). */
927 memset (regbuf
, 0, size
);
928 m_register_status
[regnum
] = REG_UNAVAILABLE
;
932 /* Supply register REGNUM to REGCACHE. Value to supply is an integer stored at
933 address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED. If
934 the register size is greater than ADDR_LEN, then the integer will be sign or
935 zero extended. If the register size is smaller than the integer, then the
936 most significant bytes of the integer will be truncated. */
939 detached_regcache::raw_supply_integer (int regnum
, const gdb_byte
*addr
,
940 int addr_len
, bool is_signed
)
942 enum bfd_endian byte_order
= gdbarch_byte_order (m_descr
->gdbarch
);
946 assert_regnum (regnum
);
948 regbuf
= register_buffer (regnum
);
949 regsize
= m_descr
->sizeof_register
[regnum
];
951 copy_integer_to_size (regbuf
, regsize
, addr
, addr_len
, is_signed
,
953 m_register_status
[regnum
] = REG_VALID
;
956 /* Supply register REGNUM with zeroed value to REGCACHE. This is not the same
957 as calling raw_supply with NULL (which will set the state to
961 detached_regcache::raw_supply_zeroed (int regnum
)
966 assert_regnum (regnum
);
968 regbuf
= register_buffer (regnum
);
969 size
= m_descr
->sizeof_register
[regnum
];
971 memset (regbuf
, 0, size
);
972 m_register_status
[regnum
] = REG_VALID
;
975 /* Collect register REGNUM from REGCACHE and store its contents in BUF. */
978 regcache_raw_collect (const struct regcache
*regcache
, int regnum
, void *buf
)
980 gdb_assert (regcache
!= NULL
&& buf
!= NULL
);
981 regcache
->raw_collect (regnum
, buf
);
985 regcache::raw_collect (int regnum
, void *buf
) const
990 gdb_assert (buf
!= NULL
);
991 assert_regnum (regnum
);
993 regbuf
= register_buffer (regnum
);
994 size
= m_descr
->sizeof_register
[regnum
];
995 memcpy (buf
, regbuf
, size
);
998 /* Transfer a single or all registers belonging to a certain register
999 set to or from a buffer. This is the main worker function for
1000 regcache_supply_regset and regcache_collect_regset. */
1002 /* Collect register REGNUM from REGCACHE. Store collected value as an integer
1003 at address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED.
1004 If ADDR_LEN is greater than the register size, then the integer will be sign
1005 or zero extended. If ADDR_LEN is smaller than the register size, then the
1006 most significant bytes of the integer will be truncated. */
1009 regcache::raw_collect_integer (int regnum
, gdb_byte
*addr
, int addr_len
,
1010 bool is_signed
) const
1012 enum bfd_endian byte_order
= gdbarch_byte_order (m_descr
->gdbarch
);
1013 const gdb_byte
*regbuf
;
1016 assert_regnum (regnum
);
1018 regbuf
= register_buffer (regnum
);
1019 regsize
= m_descr
->sizeof_register
[regnum
];
1021 copy_integer_to_size (addr
, addr_len
, regbuf
, regsize
, is_signed
,
1026 regcache::transfer_regset (const struct regset
*regset
,
1027 struct regcache
*out_regcache
,
1028 int regnum
, const void *in_buf
,
1029 void *out_buf
, size_t size
) const
1031 const struct regcache_map_entry
*map
;
1032 int offs
= 0, count
;
1034 for (map
= (const struct regcache_map_entry
*) regset
->regmap
;
1035 (count
= map
->count
) != 0;
1038 int regno
= map
->regno
;
1039 int slot_size
= map
->size
;
1041 if (slot_size
== 0 && regno
!= REGCACHE_MAP_SKIP
)
1042 slot_size
= m_descr
->sizeof_register
[regno
];
1044 if (regno
== REGCACHE_MAP_SKIP
1046 && (regnum
< regno
|| regnum
>= regno
+ count
)))
1047 offs
+= count
* slot_size
;
1049 else if (regnum
== -1)
1050 for (; count
--; regno
++, offs
+= slot_size
)
1052 if (offs
+ slot_size
> size
)
1056 raw_collect (regno
, (gdb_byte
*) out_buf
+ offs
);
1058 out_regcache
->raw_supply (regno
, in_buf
1059 ? (const gdb_byte
*) in_buf
+ offs
1064 /* Transfer a single register and return. */
1065 offs
+= (regnum
- regno
) * slot_size
;
1066 if (offs
+ slot_size
> size
)
1070 raw_collect (regnum
, (gdb_byte
*) out_buf
+ offs
);
1072 out_regcache
->raw_supply (regnum
, in_buf
1073 ? (const gdb_byte
*) in_buf
+ offs
1080 /* Supply register REGNUM from BUF to REGCACHE, using the register map
1081 in REGSET. If REGNUM is -1, do this for all registers in REGSET.
1082 If BUF is NULL, set the register(s) to "unavailable" status. */
1085 regcache_supply_regset (const struct regset
*regset
,
1086 struct regcache
*regcache
,
1087 int regnum
, const void *buf
, size_t size
)
1089 regcache
->supply_regset (regset
, regnum
, buf
, size
);
1093 regcache::supply_regset (const struct regset
*regset
,
1094 int regnum
, const void *buf
, size_t size
)
1096 transfer_regset (regset
, this, regnum
, buf
, NULL
, size
);
1099 /* Collect register REGNUM from REGCACHE to BUF, using the register
1100 map in REGSET. If REGNUM is -1, do this for all registers in
1104 regcache_collect_regset (const struct regset
*regset
,
1105 const struct regcache
*regcache
,
1106 int regnum
, void *buf
, size_t size
)
1108 regcache
->collect_regset (regset
, regnum
, buf
, size
);
1112 regcache::collect_regset (const struct regset
*regset
,
1113 int regnum
, void *buf
, size_t size
) const
1115 transfer_regset (regset
, NULL
, regnum
, NULL
, buf
, size
);
1119 /* Special handling for register PC. */
1122 regcache_read_pc (struct regcache
*regcache
)
1124 struct gdbarch
*gdbarch
= regcache
->arch ();
1128 if (gdbarch_read_pc_p (gdbarch
))
1129 pc_val
= gdbarch_read_pc (gdbarch
, regcache
);
1130 /* Else use per-frame method on get_current_frame. */
1131 else if (gdbarch_pc_regnum (gdbarch
) >= 0)
1135 if (regcache_cooked_read_unsigned (regcache
,
1136 gdbarch_pc_regnum (gdbarch
),
1137 &raw_val
) == REG_UNAVAILABLE
)
1138 throw_error (NOT_AVAILABLE_ERROR
, _("PC register is not available"));
1140 pc_val
= gdbarch_addr_bits_remove (gdbarch
, raw_val
);
1143 internal_error (__FILE__
, __LINE__
,
1144 _("regcache_read_pc: Unable to find PC"));
1149 regcache_write_pc (struct regcache
*regcache
, CORE_ADDR pc
)
1151 struct gdbarch
*gdbarch
= regcache
->arch ();
1153 if (gdbarch_write_pc_p (gdbarch
))
1154 gdbarch_write_pc (gdbarch
, regcache
, pc
);
1155 else if (gdbarch_pc_regnum (gdbarch
) >= 0)
1156 regcache_cooked_write_unsigned (regcache
,
1157 gdbarch_pc_regnum (gdbarch
), pc
);
1159 internal_error (__FILE__
, __LINE__
,
1160 _("regcache_write_pc: Unable to update PC"));
1162 /* Writing the PC (for instance, from "load") invalidates the
1164 reinit_frame_cache ();
1168 reg_buffer::num_raw_registers () const
1170 return gdbarch_num_regs (arch ());
1174 regcache::debug_print_register (const char *func
, int regno
)
1176 struct gdbarch
*gdbarch
= arch ();
1178 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
1179 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
1180 && gdbarch_register_name (gdbarch
, regno
) != NULL
1181 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
1182 fprintf_unfiltered (gdb_stdlog
, "(%s)",
1183 gdbarch_register_name (gdbarch
, regno
));
1185 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
1186 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
1188 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1189 int size
= register_size (gdbarch
, regno
);
1190 gdb_byte
*buf
= register_buffer (regno
);
1192 fprintf_unfiltered (gdb_stdlog
, " = ");
1193 for (int i
= 0; i
< size
; i
++)
1195 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
1197 if (size
<= sizeof (LONGEST
))
1199 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
1201 fprintf_unfiltered (gdb_stdlog
, " %s %s",
1202 core_addr_to_string_nz (val
), plongest (val
));
1205 fprintf_unfiltered (gdb_stdlog
, "\n");
1209 reg_flush_command (const char *command
, int from_tty
)
1211 /* Force-flush the register cache. */
1212 registers_changed ();
1214 printf_filtered (_("Register cache flushed.\n"));
1218 register_dump::dump (ui_file
*file
)
1220 auto descr
= regcache_descr (m_gdbarch
);
1222 int footnote_nr
= 0;
1223 int footnote_register_offset
= 0;
1224 int footnote_register_type_name_null
= 0;
1225 long register_offset
= 0;
1227 gdb_assert (descr
->nr_cooked_registers
1228 == (gdbarch_num_regs (m_gdbarch
)
1229 + gdbarch_num_pseudo_regs (m_gdbarch
)));
1231 for (regnum
= -1; regnum
< descr
->nr_cooked_registers
; regnum
++)
1235 fprintf_unfiltered (file
, " %-10s", "Name");
1238 const char *p
= gdbarch_register_name (m_gdbarch
, regnum
);
1242 else if (p
[0] == '\0')
1244 fprintf_unfiltered (file
, " %-10s", p
);
1249 fprintf_unfiltered (file
, " %4s", "Nr");
1251 fprintf_unfiltered (file
, " %4d", regnum
);
1253 /* Relative number. */
1255 fprintf_unfiltered (file
, " %4s", "Rel");
1256 else if (regnum
< gdbarch_num_regs (m_gdbarch
))
1257 fprintf_unfiltered (file
, " %4d", regnum
);
1259 fprintf_unfiltered (file
, " %4d",
1260 (regnum
- gdbarch_num_regs (m_gdbarch
)));
1264 fprintf_unfiltered (file
, " %6s ", "Offset");
1267 fprintf_unfiltered (file
, " %6ld",
1268 descr
->register_offset
[regnum
]);
1269 if (register_offset
!= descr
->register_offset
[regnum
]
1271 && (descr
->register_offset
[regnum
]
1272 != (descr
->register_offset
[regnum
- 1]
1273 + descr
->sizeof_register
[regnum
- 1])))
1276 if (!footnote_register_offset
)
1277 footnote_register_offset
= ++footnote_nr
;
1278 fprintf_unfiltered (file
, "*%d", footnote_register_offset
);
1281 fprintf_unfiltered (file
, " ");
1282 register_offset
= (descr
->register_offset
[regnum
]
1283 + descr
->sizeof_register
[regnum
]);
1288 fprintf_unfiltered (file
, " %5s ", "Size");
1290 fprintf_unfiltered (file
, " %5ld", descr
->sizeof_register
[regnum
]);
1295 std::string name_holder
;
1301 static const char blt
[] = "builtin_type";
1303 t
= TYPE_NAME (register_type (m_gdbarch
, regnum
));
1306 if (!footnote_register_type_name_null
)
1307 footnote_register_type_name_null
= ++footnote_nr
;
1308 name_holder
= string_printf ("*%d",
1309 footnote_register_type_name_null
);
1310 t
= name_holder
.c_str ();
1312 /* Chop a leading builtin_type. */
1313 if (startswith (t
, blt
))
1316 fprintf_unfiltered (file
, " %-15s", t
);
1319 /* Leading space always present. */
1320 fprintf_unfiltered (file
, " ");
1322 dump_reg (file
, regnum
);
1324 fprintf_unfiltered (file
, "\n");
1327 if (footnote_register_offset
)
1328 fprintf_unfiltered (file
, "*%d: Inconsistent register offsets.\n",
1329 footnote_register_offset
);
1330 if (footnote_register_type_name_null
)
1331 fprintf_unfiltered (file
,
1332 "*%d: Register type's name NULL.\n",
1333 footnote_register_type_name_null
);
1337 #include "selftest.h"
1338 #include "selftest-arch.h"
1339 #include "gdbthread.h"
1340 #include "target-float.h"
1342 namespace selftests
{
1344 class regcache_access
: public regcache
1348 /* Return the number of elements in current_regcache. */
1351 current_regcache_size ()
1353 return std::distance (regcache::current_regcache
.begin (),
1354 regcache::current_regcache
.end ());
1359 current_regcache_test (void)
1361 /* It is empty at the start. */
1362 SELF_CHECK (regcache_access::current_regcache_size () == 0);
1364 ptid_t
ptid1 (1), ptid2 (2), ptid3 (3);
1366 /* Get regcache from ptid1, a new regcache is added to
1367 current_regcache. */
1368 regcache
*regcache
= get_thread_arch_aspace_regcache (ptid1
,
1372 SELF_CHECK (regcache
!= NULL
);
1373 SELF_CHECK (regcache
->ptid () == ptid1
);
1374 SELF_CHECK (regcache_access::current_regcache_size () == 1);
1376 /* Get regcache from ptid2, a new regcache is added to
1377 current_regcache. */
1378 regcache
= get_thread_arch_aspace_regcache (ptid2
,
1381 SELF_CHECK (regcache
!= NULL
);
1382 SELF_CHECK (regcache
->ptid () == ptid2
);
1383 SELF_CHECK (regcache_access::current_regcache_size () == 2);
1385 /* Get regcache from ptid3, a new regcache is added to
1386 current_regcache. */
1387 regcache
= get_thread_arch_aspace_regcache (ptid3
,
1390 SELF_CHECK (regcache
!= NULL
);
1391 SELF_CHECK (regcache
->ptid () == ptid3
);
1392 SELF_CHECK (regcache_access::current_regcache_size () == 3);
1394 /* Get regcache from ptid2 again, nothing is added to
1395 current_regcache. */
1396 regcache
= get_thread_arch_aspace_regcache (ptid2
,
1399 SELF_CHECK (regcache
!= NULL
);
1400 SELF_CHECK (regcache
->ptid () == ptid2
);
1401 SELF_CHECK (regcache_access::current_regcache_size () == 3);
1403 /* Mark ptid2 is changed, so regcache of ptid2 should be removed from
1404 current_regcache. */
1405 registers_changed_ptid (ptid2
);
1406 SELF_CHECK (regcache_access::current_regcache_size () == 2);
1409 class target_ops_no_register
: public test_target_ops
1412 target_ops_no_register ()
1413 : test_target_ops
{}
1418 fetch_registers_called
= 0;
1419 store_registers_called
= 0;
1420 xfer_partial_called
= 0;
1423 void fetch_registers (regcache
*regs
, int regno
) override
;
1424 void store_registers (regcache
*regs
, int regno
) override
;
1426 enum target_xfer_status
xfer_partial (enum target_object object
,
1427 const char *annex
, gdb_byte
*readbuf
,
1428 const gdb_byte
*writebuf
,
1429 ULONGEST offset
, ULONGEST len
,
1430 ULONGEST
*xfered_len
) override
;
1432 unsigned int fetch_registers_called
= 0;
1433 unsigned int store_registers_called
= 0;
1434 unsigned int xfer_partial_called
= 0;
1438 target_ops_no_register::fetch_registers (regcache
*regs
, int regno
)
1440 /* Mark register available. */
1441 regs
->raw_supply_zeroed (regno
);
1442 this->fetch_registers_called
++;
1446 target_ops_no_register::store_registers (regcache
*regs
, int regno
)
1448 this->store_registers_called
++;
1451 enum target_xfer_status
1452 target_ops_no_register::xfer_partial (enum target_object object
,
1453 const char *annex
, gdb_byte
*readbuf
,
1454 const gdb_byte
*writebuf
,
1455 ULONGEST offset
, ULONGEST len
,
1456 ULONGEST
*xfered_len
)
1458 this->xfer_partial_called
++;
1461 return TARGET_XFER_OK
;
1464 class readwrite_regcache
: public regcache
1467 readwrite_regcache (struct gdbarch
*gdbarch
)
1468 : regcache (gdbarch
, nullptr)
1472 /* Test regcache::cooked_read gets registers from raw registers and
1473 memory instead of target to_{fetch,store}_registers. */
1476 cooked_read_test (struct gdbarch
*gdbarch
)
1478 /* Error out if debugging something, because we're going to push the
1479 test target, which would pop any existing target. */
1480 if (target_stack
->to_stratum
>= process_stratum
)
1481 error (_("target already pushed"));
1483 /* Create a mock environment. An inferior with a thread, with a
1484 process_stratum target pushed. */
1486 target_ops_no_register mock_target
;
1487 ptid_t
mock_ptid (1, 1);
1488 inferior
mock_inferior (mock_ptid
.pid ());
1489 address_space mock_aspace
{};
1490 mock_inferior
.gdbarch
= gdbarch
;
1491 mock_inferior
.aspace
= &mock_aspace
;
1492 thread_info
mock_thread (&mock_inferior
, mock_ptid
);
1494 scoped_restore restore_thread_list
1495 = make_scoped_restore (&thread_list
, &mock_thread
);
1497 /* Add the mock inferior to the inferior list so that look ups by
1498 target+ptid can find it. */
1499 scoped_restore restore_inferior_list
1500 = make_scoped_restore (&inferior_list
);
1501 inferior_list
= &mock_inferior
;
1503 /* Switch to the mock inferior. */
1504 scoped_restore_current_inferior restore_current_inferior
;
1505 set_current_inferior (&mock_inferior
);
1507 /* Push the process_stratum target so we can mock accessing
1509 push_target (&mock_target
);
1511 /* Pop it again on exit (return/exception). */
1516 pop_all_targets_at_and_above (process_stratum
);
1520 /* Switch to the mock thread. */
1521 scoped_restore restore_inferior_ptid
1522 = make_scoped_restore (&inferior_ptid
, mock_ptid
);
1524 /* Test that read one raw register from regcache_no_target will go
1525 to the target layer. */
1528 /* Find a raw register which size isn't zero. */
1529 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
1531 if (register_size (gdbarch
, regnum
) != 0)
1535 readwrite_regcache
readwrite (gdbarch
);
1536 gdb::def_vector
<gdb_byte
> buf (register_size (gdbarch
, regnum
));
1538 readwrite
.raw_read (regnum
, buf
.data ());
1540 /* raw_read calls target_fetch_registers. */
1541 SELF_CHECK (mock_target
.fetch_registers_called
> 0);
1542 mock_target
.reset ();
1544 /* Mark all raw registers valid, so the following raw registers
1545 accesses won't go to target. */
1546 for (auto i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
1547 readwrite
.raw_update (i
);
1549 mock_target
.reset ();
1550 /* Then, read all raw and pseudo registers, and don't expect calling
1551 to_{fetch,store}_registers. */
1552 for (int regnum
= 0;
1553 regnum
< gdbarch_num_regs (gdbarch
) + gdbarch_num_pseudo_regs (gdbarch
);
1556 if (register_size (gdbarch
, regnum
) == 0)
1559 gdb::def_vector
<gdb_byte
> buf (register_size (gdbarch
, regnum
));
1561 SELF_CHECK (REG_VALID
== readwrite
.cooked_read (regnum
, buf
.data ()));
1563 SELF_CHECK (mock_target
.fetch_registers_called
== 0);
1564 SELF_CHECK (mock_target
.store_registers_called
== 0);
1566 /* Some SPU pseudo registers are got via TARGET_OBJECT_SPU. */
1567 if (gdbarch_bfd_arch_info (gdbarch
)->arch
!= bfd_arch_spu
)
1568 SELF_CHECK (mock_target
.xfer_partial_called
== 0);
1570 mock_target
.reset ();
1573 readonly_detached_regcache
readonly (readwrite
);
1575 /* GDB may go to target layer to fetch all registers and memory for
1576 readonly regcache. */
1577 mock_target
.reset ();
1579 for (int regnum
= 0;
1580 regnum
< gdbarch_num_regs (gdbarch
) + gdbarch_num_pseudo_regs (gdbarch
);
1583 if (register_size (gdbarch
, regnum
) == 0)
1586 gdb::def_vector
<gdb_byte
> buf (register_size (gdbarch
, regnum
));
1587 enum register_status status
= readonly
.cooked_read (regnum
,
1590 if (regnum
< gdbarch_num_regs (gdbarch
))
1592 auto bfd_arch
= gdbarch_bfd_arch_info (gdbarch
)->arch
;
1594 if (bfd_arch
== bfd_arch_frv
|| bfd_arch
== bfd_arch_h8300
1595 || bfd_arch
== bfd_arch_m32c
|| bfd_arch
== bfd_arch_sh
1596 || bfd_arch
== bfd_arch_alpha
|| bfd_arch
== bfd_arch_v850
1597 || bfd_arch
== bfd_arch_msp430
|| bfd_arch
== bfd_arch_mep
1598 || bfd_arch
== bfd_arch_mips
|| bfd_arch
== bfd_arch_v850_rh850
1599 || bfd_arch
== bfd_arch_tic6x
|| bfd_arch
== bfd_arch_mn10300
1600 || bfd_arch
== bfd_arch_rl78
|| bfd_arch
== bfd_arch_score
1601 || bfd_arch
== bfd_arch_riscv
)
1603 /* Raw registers. If raw registers are not in save_reggroup,
1604 their status are unknown. */
1605 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, save_reggroup
))
1606 SELF_CHECK (status
== REG_VALID
);
1608 SELF_CHECK (status
== REG_UNKNOWN
);
1611 SELF_CHECK (status
== REG_VALID
);
1615 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, save_reggroup
))
1616 SELF_CHECK (status
== REG_VALID
);
1619 /* If pseudo registers are not in save_reggroup, some of
1620 them can be computed from saved raw registers, but some
1621 of them are unknown. */
1622 auto bfd_arch
= gdbarch_bfd_arch_info (gdbarch
)->arch
;
1624 if (bfd_arch
== bfd_arch_frv
1625 || bfd_arch
== bfd_arch_m32c
1626 || bfd_arch
== bfd_arch_mep
1627 || bfd_arch
== bfd_arch_sh
)
1628 SELF_CHECK (status
== REG_VALID
|| status
== REG_UNKNOWN
);
1629 else if (bfd_arch
== bfd_arch_mips
1630 || bfd_arch
== bfd_arch_h8300
)
1631 SELF_CHECK (status
== REG_UNKNOWN
);
1633 SELF_CHECK (status
== REG_VALID
);
1637 SELF_CHECK (mock_target
.fetch_registers_called
== 0);
1638 SELF_CHECK (mock_target
.store_registers_called
== 0);
1639 SELF_CHECK (mock_target
.xfer_partial_called
== 0);
1641 mock_target
.reset ();
1645 /* Test regcache::cooked_write by writing some expected contents to
1646 registers, and checking that contents read from registers and the
1647 expected contents are the same. */
1650 cooked_write_test (struct gdbarch
*gdbarch
)
1652 /* Error out if debugging something, because we're going to push the
1653 test target, which would pop any existing target. */
1654 if (target_stack
->to_stratum
>= process_stratum
)
1655 error (_("target already pushed"));
1657 /* Create a mock environment. A process_stratum target pushed. */
1659 target_ops_no_register mock_target
;
1661 /* Push the process_stratum target so we can mock accessing
1663 push_target (&mock_target
);
1665 /* Pop it again on exit (return/exception). */
1670 pop_all_targets_at_and_above (process_stratum
);
1674 readwrite_regcache
readwrite (gdbarch
);
1676 const int num_regs
= (gdbarch_num_regs (gdbarch
)
1677 + gdbarch_num_pseudo_regs (gdbarch
));
1679 for (auto regnum
= 0; regnum
< num_regs
; regnum
++)
1681 if (register_size (gdbarch
, regnum
) == 0
1682 || gdbarch_cannot_store_register (gdbarch
, regnum
))
1685 auto bfd_arch
= gdbarch_bfd_arch_info (gdbarch
)->arch
;
1687 if ((bfd_arch
== bfd_arch_sparc
1688 /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM,
1689 SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */
1690 && gdbarch_ptr_bit (gdbarch
) == 64
1691 && (regnum
>= gdbarch_num_regs (gdbarch
)
1692 && regnum
<= gdbarch_num_regs (gdbarch
) + 4))
1693 || (bfd_arch
== bfd_arch_spu
1694 /* SPU pseudo registers except SPU_SP_REGNUM are got by
1695 TARGET_OBJECT_SPU. */
1696 && regnum
>= gdbarch_num_regs (gdbarch
) && regnum
!= 130))
1699 std::vector
<gdb_byte
> expected (register_size (gdbarch
, regnum
), 0);
1700 std::vector
<gdb_byte
> buf (register_size (gdbarch
, regnum
), 0);
1701 const auto type
= register_type (gdbarch
, regnum
);
1703 if (TYPE_CODE (type
) == TYPE_CODE_FLT
1704 || TYPE_CODE (type
) == TYPE_CODE_DECFLOAT
)
1706 /* Generate valid float format. */
1707 target_float_from_string (expected
.data (), type
, "1.25");
1709 else if (TYPE_CODE (type
) == TYPE_CODE_INT
1710 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
1711 || TYPE_CODE (type
) == TYPE_CODE_PTR
1712 || TYPE_CODE (type
) == TYPE_CODE_UNION
1713 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
)
1715 if (bfd_arch
== bfd_arch_ia64
1716 || (regnum
>= gdbarch_num_regs (gdbarch
)
1717 && (bfd_arch
== bfd_arch_xtensa
1718 || bfd_arch
== bfd_arch_bfin
1719 || bfd_arch
== bfd_arch_m32c
1720 /* m68hc11 pseudo registers are in memory. */
1721 || bfd_arch
== bfd_arch_m68hc11
1722 || bfd_arch
== bfd_arch_m68hc12
1723 || bfd_arch
== bfd_arch_s390
))
1724 || (bfd_arch
== bfd_arch_frv
1725 /* FRV pseudo registers except iacc0. */
1726 && regnum
> gdbarch_num_regs (gdbarch
)))
1728 /* Skip setting the expected values for some architecture
1731 else if (bfd_arch
== bfd_arch_rl78
&& regnum
== 40)
1733 /* RL78_PC_REGNUM */
1734 for (auto j
= 0; j
< register_size (gdbarch
, regnum
) - 1; j
++)
1739 for (auto j
= 0; j
< register_size (gdbarch
, regnum
); j
++)
1743 else if (TYPE_CODE (type
) == TYPE_CODE_FLAGS
)
1745 /* No idea how to test flags. */
1750 /* If we don't know how to create the expected value for the
1751 this type, make it fail. */
1755 readwrite
.cooked_write (regnum
, expected
.data ());
1757 SELF_CHECK (readwrite
.cooked_read (regnum
, buf
.data ()) == REG_VALID
);
1758 SELF_CHECK (expected
== buf
);
1762 } // namespace selftests
1763 #endif /* GDB_SELF_TEST */
1766 _initialize_regcache (void)
1768 regcache_descr_handle
1769 = gdbarch_data_register_post_init (init_regcache_descr
);
1771 gdb::observers::target_changed
.attach (regcache_observer_target_changed
);
1772 gdb::observers::thread_ptid_changed
.attach
1773 (regcache::regcache_thread_ptid_changed
);
1775 add_com ("flushregs", class_maintenance
, reg_flush_command
,
1776 _("Force gdb to flush its register cache (maintainer command)"));
1779 selftests::register_test ("current_regcache", selftests::current_regcache_test
);
1781 selftests::register_test_foreach_arch ("regcache::cooked_read_test",
1782 selftests::cooked_read_test
);
1783 selftests::register_test_foreach_arch ("regcache::cooked_write_test",
1784 selftests::cooked_write_test
);