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 readable_regcache::cooked_read_part (int regnum, int offset, int len,
870 gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers);
871 return read_part (regnum, offset, len, buf, false);
875 regcache_cooked_write_part (struct regcache *regcache, int regnum,
876 int offset, int len, const gdb_byte *buf)
878 regcache->cooked_write_part (regnum, offset, len, buf);
882 regcache::cooked_write_part (int regnum, int offset, int len,
885 gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers);
886 write_part (regnum, offset, len, buf, false);
889 /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */
892 regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf)
894 gdb_assert (regcache != NULL);
895 regcache->raw_supply (regnum, buf);
899 detached_regcache::raw_supply (int regnum, const void *buf)
904 assert_regnum (regnum);
906 regbuf = register_buffer (regnum);
907 size = m_descr->sizeof_register[regnum];
911 memcpy (regbuf, buf, size);
912 m_register_status[regnum] = REG_VALID;
916 /* This memset not strictly necessary, but better than garbage
917 in case the register value manages to escape somewhere (due
918 to a bug, no less). */
919 memset (regbuf, 0, size);
920 m_register_status[regnum] = REG_UNAVAILABLE;
924 /* Supply register REGNUM to REGCACHE. Value to supply is an integer stored at
925 address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED. If
926 the register size is greater than ADDR_LEN, then the integer will be sign or
927 zero extended. If the register size is smaller than the integer, then the
928 most significant bytes of the integer will be truncated. */
931 detached_regcache::raw_supply_integer (int regnum, const gdb_byte *addr,
932 int addr_len, bool is_signed)
934 enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch);
938 assert_regnum (regnum);
940 regbuf = register_buffer (regnum);
941 regsize = m_descr->sizeof_register[regnum];
943 copy_integer_to_size (regbuf, regsize, addr, addr_len, is_signed,
945 m_register_status[regnum] = REG_VALID;
948 /* Supply register REGNUM with zeroed value to REGCACHE. This is not the same
949 as calling raw_supply with NULL (which will set the state to
953 detached_regcache::raw_supply_zeroed (int regnum)
958 assert_regnum (regnum);
960 regbuf = register_buffer (regnum);
961 size = m_descr->sizeof_register[regnum];
963 memset (regbuf, 0, size);
964 m_register_status[regnum] = REG_VALID;
967 /* Collect register REGNUM from REGCACHE and store its contents in BUF. */
970 regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf)
972 gdb_assert (regcache != NULL && buf != NULL);
973 regcache->raw_collect (regnum, buf);
977 regcache::raw_collect (int regnum, void *buf) const
982 gdb_assert (buf != NULL);
983 assert_regnum (regnum);
985 regbuf = register_buffer (regnum);
986 size = m_descr->sizeof_register[regnum];
987 memcpy (buf, regbuf, size);
990 /* Transfer a single or all registers belonging to a certain register
991 set to or from a buffer. This is the main worker function for
992 regcache_supply_regset and regcache_collect_regset. */
994 /* Collect register REGNUM from REGCACHE. Store collected value as an integer
995 at address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED.
996 If ADDR_LEN is greater than the register size, then the integer will be sign
997 or zero extended. If ADDR_LEN is smaller than the register size, then the
998 most significant bytes of the integer will be truncated. */
1001 regcache::raw_collect_integer (int regnum, gdb_byte *addr, int addr_len,
1002 bool is_signed) const
1004 enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch);
1005 const gdb_byte *regbuf;
1008 assert_regnum (regnum);
1010 regbuf = register_buffer (regnum);
1011 regsize = m_descr->sizeof_register[regnum];
1013 copy_integer_to_size (addr, addr_len, regbuf, regsize, is_signed,
1018 regcache::transfer_regset (const struct regset *regset,
1019 struct regcache *out_regcache,
1020 int regnum, const void *in_buf,
1021 void *out_buf, size_t size) const
1023 const struct regcache_map_entry *map;
1024 int offs = 0, count;
1026 for (map = (const struct regcache_map_entry *) regset->regmap;
1027 (count = map->count) != 0;
1030 int regno = map->regno;
1031 int slot_size = map->size;
1033 if (slot_size == 0 && regno != REGCACHE_MAP_SKIP)
1034 slot_size = m_descr->sizeof_register[regno];
1036 if (regno == REGCACHE_MAP_SKIP
1038 && (regnum < regno || regnum >= regno + count)))
1039 offs += count * slot_size;
1041 else if (regnum == -1)
1042 for (; count--; regno++, offs += slot_size)
1044 if (offs + slot_size > size)
1048 raw_collect (regno, (gdb_byte *) out_buf + offs);
1050 out_regcache->raw_supply (regno, in_buf
1051 ? (const gdb_byte *) in_buf + offs
1056 /* Transfer a single register and return. */
1057 offs += (regnum - regno) * slot_size;
1058 if (offs + slot_size > size)
1062 raw_collect (regnum, (gdb_byte *) out_buf + offs);
1064 out_regcache->raw_supply (regnum, in_buf
1065 ? (const gdb_byte *) in_buf + offs
1072 /* Supply register REGNUM from BUF to REGCACHE, using the register map
1073 in REGSET. If REGNUM is -1, do this for all registers in REGSET.
1074 If BUF is NULL, set the register(s) to "unavailable" status. */
1077 regcache_supply_regset (const struct regset *regset,
1078 struct regcache *regcache,
1079 int regnum, const void *buf, size_t size)
1081 regcache->supply_regset (regset, regnum, buf, size);
1085 regcache::supply_regset (const struct regset *regset,
1086 int regnum, const void *buf, size_t size)
1088 transfer_regset (regset, this, regnum, buf, NULL, size);
1091 /* Collect register REGNUM from REGCACHE to BUF, using the register
1092 map in REGSET. If REGNUM is -1, do this for all registers in
1096 regcache_collect_regset (const struct regset *regset,
1097 const struct regcache *regcache,
1098 int regnum, void *buf, size_t size)
1100 regcache->collect_regset (regset, regnum, buf, size);
1104 regcache::collect_regset (const struct regset *regset,
1105 int regnum, void *buf, size_t size) const
1107 transfer_regset (regset, NULL, regnum, NULL, buf, size);
1111 /* Special handling for register PC. */
1114 regcache_read_pc (struct regcache *regcache)
1116 struct gdbarch *gdbarch = regcache->arch ();
1120 if (gdbarch_read_pc_p (gdbarch))
1121 pc_val = gdbarch_read_pc (gdbarch, regcache);
1122 /* Else use per-frame method on get_current_frame. */
1123 else if (gdbarch_pc_regnum (gdbarch) >= 0)
1127 if (regcache_cooked_read_unsigned (regcache,
1128 gdbarch_pc_regnum (gdbarch),
1129 &raw_val) == REG_UNAVAILABLE)
1130 throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available"));
1132 pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val);
1135 internal_error (__FILE__, __LINE__,
1136 _("regcache_read_pc: Unable to find PC"));
1141 regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
1143 struct gdbarch *gdbarch = regcache->arch ();
1145 if (gdbarch_write_pc_p (gdbarch))
1146 gdbarch_write_pc (gdbarch, regcache, pc);
1147 else if (gdbarch_pc_regnum (gdbarch) >= 0)
1148 regcache_cooked_write_unsigned (regcache,
1149 gdbarch_pc_regnum (gdbarch), pc);
1151 internal_error (__FILE__, __LINE__,
1152 _("regcache_write_pc: Unable to update PC"));
1154 /* Writing the PC (for instance, from "load") invalidates the
1156 reinit_frame_cache ();
1160 reg_buffer::num_raw_registers () const
1162 return gdbarch_num_regs (arch ());
1166 regcache::debug_print_register (const char *func, int regno)
1168 struct gdbarch *gdbarch = arch ();
1170 fprintf_unfiltered (gdb_stdlog, "%s ", func);
1171 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
1172 && gdbarch_register_name (gdbarch, regno) != NULL
1173 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
1174 fprintf_unfiltered (gdb_stdlog, "(%s)",
1175 gdbarch_register_name (gdbarch, regno));
1177 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
1178 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
1180 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1181 int size = register_size (gdbarch, regno);
1182 gdb_byte *buf = register_buffer (regno);
1184 fprintf_unfiltered (gdb_stdlog, " = ");
1185 for (int i = 0; i < size; i++)
1187 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
1189 if (size <= sizeof (LONGEST))
1191 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
1193 fprintf_unfiltered (gdb_stdlog, " %s %s",
1194 core_addr_to_string_nz (val), plongest (val));
1197 fprintf_unfiltered (gdb_stdlog, "\n");
1201 reg_flush_command (const char *command, int from_tty)
1203 /* Force-flush the register cache. */
1204 registers_changed ();
1206 printf_filtered (_("Register cache flushed.\n"));
1210 register_dump::dump (ui_file *file)
1212 auto descr = regcache_descr (m_gdbarch);
1214 int footnote_nr = 0;
1215 int footnote_register_offset = 0;
1216 int footnote_register_type_name_null = 0;
1217 long register_offset = 0;
1219 gdb_assert (descr->nr_cooked_registers
1220 == (gdbarch_num_regs (m_gdbarch)
1221 + gdbarch_num_pseudo_regs (m_gdbarch)));
1223 for (regnum = -1; regnum < descr->nr_cooked_registers; regnum++)
1227 fprintf_unfiltered (file, " %-10s", "Name");
1230 const char *p = gdbarch_register_name (m_gdbarch, regnum);
1234 else if (p[0] == '\0')
1236 fprintf_unfiltered (file, " %-10s", p);
1241 fprintf_unfiltered (file, " %4s", "Nr");
1243 fprintf_unfiltered (file, " %4d", regnum);
1245 /* Relative number. */
1247 fprintf_unfiltered (file, " %4s", "Rel");
1248 else if (regnum < gdbarch_num_regs (m_gdbarch))
1249 fprintf_unfiltered (file, " %4d", regnum);
1251 fprintf_unfiltered (file, " %4d",
1252 (regnum - gdbarch_num_regs (m_gdbarch)));
1256 fprintf_unfiltered (file, " %6s ", "Offset");
1259 fprintf_unfiltered (file, " %6ld",
1260 descr->register_offset[regnum]);
1261 if (register_offset != descr->register_offset[regnum]
1263 && (descr->register_offset[regnum]
1264 != (descr->register_offset[regnum - 1]
1265 + descr->sizeof_register[regnum - 1])))
1268 if (!footnote_register_offset)
1269 footnote_register_offset = ++footnote_nr;
1270 fprintf_unfiltered (file, "*%d", footnote_register_offset);
1273 fprintf_unfiltered (file, " ");
1274 register_offset = (descr->register_offset[regnum]
1275 + descr->sizeof_register[regnum]);
1280 fprintf_unfiltered (file, " %5s ", "Size");
1282 fprintf_unfiltered (file, " %5ld", descr->sizeof_register[regnum]);
1287 std::string name_holder;
1293 static const char blt[] = "builtin_type";
1295 t = TYPE_NAME (register_type (m_gdbarch, regnum));
1298 if (!footnote_register_type_name_null)
1299 footnote_register_type_name_null = ++footnote_nr;
1300 name_holder = string_printf ("*%d",
1301 footnote_register_type_name_null);
1302 t = name_holder.c_str ();
1304 /* Chop a leading builtin_type. */
1305 if (startswith (t, blt))
1308 fprintf_unfiltered (file, " %-15s", t);
1311 /* Leading space always present. */
1312 fprintf_unfiltered (file, " ");
1314 dump_reg (file, regnum);
1316 fprintf_unfiltered (file, "\n");
1319 if (footnote_register_offset)
1320 fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n",
1321 footnote_register_offset);
1322 if (footnote_register_type_name_null)
1323 fprintf_unfiltered (file,
1324 "*%d: Register type's name NULL.\n",
1325 footnote_register_type_name_null);
1329 #include "selftest.h"
1330 #include "selftest-arch.h"
1331 #include "gdbthread.h"
1332 #include "target-float.h"
1334 namespace selftests {
1336 class regcache_access : public regcache
1340 /* Return the number of elements in current_regcache. */
1343 current_regcache_size ()
1345 return std::distance (regcache::current_regcache.begin (),
1346 regcache::current_regcache.end ());
1351 current_regcache_test (void)
1353 /* It is empty at the start. */
1354 SELF_CHECK (regcache_access::current_regcache_size () == 0);
1356 ptid_t ptid1 (1), ptid2 (2), ptid3 (3);
1358 /* Get regcache from ptid1, a new regcache is added to
1359 current_regcache. */
1360 regcache *regcache = get_thread_arch_aspace_regcache (ptid1,
1364 SELF_CHECK (regcache != NULL);
1365 SELF_CHECK (regcache->ptid () == ptid1);
1366 SELF_CHECK (regcache_access::current_regcache_size () == 1);
1368 /* Get regcache from ptid2, a new regcache is added to
1369 current_regcache. */
1370 regcache = get_thread_arch_aspace_regcache (ptid2,
1373 SELF_CHECK (regcache != NULL);
1374 SELF_CHECK (regcache->ptid () == ptid2);
1375 SELF_CHECK (regcache_access::current_regcache_size () == 2);
1377 /* Get regcache from ptid3, a new regcache is added to
1378 current_regcache. */
1379 regcache = get_thread_arch_aspace_regcache (ptid3,
1382 SELF_CHECK (regcache != NULL);
1383 SELF_CHECK (regcache->ptid () == ptid3);
1384 SELF_CHECK (regcache_access::current_regcache_size () == 3);
1386 /* Get regcache from ptid2 again, nothing is added to
1387 current_regcache. */
1388 regcache = get_thread_arch_aspace_regcache (ptid2,
1391 SELF_CHECK (regcache != NULL);
1392 SELF_CHECK (regcache->ptid () == ptid2);
1393 SELF_CHECK (regcache_access::current_regcache_size () == 3);
1395 /* Mark ptid2 is changed, so regcache of ptid2 should be removed from
1396 current_regcache. */
1397 registers_changed_ptid (ptid2);
1398 SELF_CHECK (regcache_access::current_regcache_size () == 2);
1401 class target_ops_no_register : public test_target_ops
1404 target_ops_no_register ()
1405 : test_target_ops {}
1410 fetch_registers_called = 0;
1411 store_registers_called = 0;
1412 xfer_partial_called = 0;
1415 void fetch_registers (regcache *regs, int regno) override;
1416 void store_registers (regcache *regs, int regno) override;
1418 enum target_xfer_status xfer_partial (enum target_object object,
1419 const char *annex, gdb_byte *readbuf,
1420 const gdb_byte *writebuf,
1421 ULONGEST offset, ULONGEST len,
1422 ULONGEST *xfered_len) override;
1424 unsigned int fetch_registers_called = 0;
1425 unsigned int store_registers_called = 0;
1426 unsigned int xfer_partial_called = 0;
1430 target_ops_no_register::fetch_registers (regcache *regs, int regno)
1432 /* Mark register available. */
1433 regs->raw_supply_zeroed (regno);
1434 this->fetch_registers_called++;
1438 target_ops_no_register::store_registers (regcache *regs, int regno)
1440 this->store_registers_called++;
1443 enum target_xfer_status
1444 target_ops_no_register::xfer_partial (enum target_object object,
1445 const char *annex, gdb_byte *readbuf,
1446 const gdb_byte *writebuf,
1447 ULONGEST offset, ULONGEST len,
1448 ULONGEST *xfered_len)
1450 this->xfer_partial_called++;
1453 return TARGET_XFER_OK;
1456 class readwrite_regcache : public regcache
1459 readwrite_regcache (struct gdbarch *gdbarch)
1460 : regcache (gdbarch, nullptr)
1464 /* Test regcache::cooked_read gets registers from raw registers and
1465 memory instead of target to_{fetch,store}_registers. */
1468 cooked_read_test (struct gdbarch *gdbarch)
1470 /* Error out if debugging something, because we're going to push the
1471 test target, which would pop any existing target. */
1472 if (target_stack->to_stratum >= process_stratum)
1473 error (_("target already pushed"));
1475 /* Create a mock environment. An inferior with a thread, with a
1476 process_stratum target pushed. */
1478 target_ops_no_register mock_target;
1479 ptid_t mock_ptid (1, 1);
1480 inferior mock_inferior (mock_ptid.pid ());
1481 address_space mock_aspace {};
1482 mock_inferior.gdbarch = gdbarch;
1483 mock_inferior.aspace = &mock_aspace;
1484 thread_info mock_thread (&mock_inferior, mock_ptid);
1486 scoped_restore restore_thread_list
1487 = make_scoped_restore (&thread_list, &mock_thread);
1489 /* Add the mock inferior to the inferior list so that look ups by
1490 target+ptid can find it. */
1491 scoped_restore restore_inferior_list
1492 = make_scoped_restore (&inferior_list);
1493 inferior_list = &mock_inferior;
1495 /* Switch to the mock inferior. */
1496 scoped_restore_current_inferior restore_current_inferior;
1497 set_current_inferior (&mock_inferior);
1499 /* Push the process_stratum target so we can mock accessing
1501 push_target (&mock_target);
1503 /* Pop it again on exit (return/exception). */
1508 pop_all_targets_at_and_above (process_stratum);
1512 /* Switch to the mock thread. */
1513 scoped_restore restore_inferior_ptid
1514 = make_scoped_restore (&inferior_ptid, mock_ptid);
1516 /* Test that read one raw register from regcache_no_target will go
1517 to the target layer. */
1520 /* Find a raw register which size isn't zero. */
1521 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
1523 if (register_size (gdbarch, regnum) != 0)
1527 readwrite_regcache readwrite (gdbarch);
1528 gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum));
1530 readwrite.raw_read (regnum, buf.data ());
1532 /* raw_read calls target_fetch_registers. */
1533 SELF_CHECK (mock_target.fetch_registers_called > 0);
1534 mock_target.reset ();
1536 /* Mark all raw registers valid, so the following raw registers
1537 accesses won't go to target. */
1538 for (auto i = 0; i < gdbarch_num_regs (gdbarch); i++)
1539 readwrite.raw_update (i);
1541 mock_target.reset ();
1542 /* Then, read all raw and pseudo registers, and don't expect calling
1543 to_{fetch,store}_registers. */
1544 for (int regnum = 0;
1545 regnum < gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch);
1548 if (register_size (gdbarch, regnum) == 0)
1551 gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum));
1553 SELF_CHECK (REG_VALID == readwrite.cooked_read (regnum, buf.data ()));
1555 SELF_CHECK (mock_target.fetch_registers_called == 0);
1556 SELF_CHECK (mock_target.store_registers_called == 0);
1558 /* Some SPU pseudo registers are got via TARGET_OBJECT_SPU. */
1559 if (gdbarch_bfd_arch_info (gdbarch)->arch != bfd_arch_spu)
1560 SELF_CHECK (mock_target.xfer_partial_called == 0);
1562 mock_target.reset ();
1565 readonly_detached_regcache readonly (readwrite);
1567 /* GDB may go to target layer to fetch all registers and memory for
1568 readonly regcache. */
1569 mock_target.reset ();
1571 for (int regnum = 0;
1572 regnum < gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch);
1575 if (register_size (gdbarch, regnum) == 0)
1578 gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum));
1579 enum register_status status = readonly.cooked_read (regnum,
1582 if (regnum < gdbarch_num_regs (gdbarch))
1584 auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch;
1586 if (bfd_arch == bfd_arch_frv || bfd_arch == bfd_arch_h8300
1587 || bfd_arch == bfd_arch_m32c || bfd_arch == bfd_arch_sh
1588 || bfd_arch == bfd_arch_alpha || bfd_arch == bfd_arch_v850
1589 || bfd_arch == bfd_arch_msp430 || bfd_arch == bfd_arch_mep
1590 || bfd_arch == bfd_arch_mips || bfd_arch == bfd_arch_v850_rh850
1591 || bfd_arch == bfd_arch_tic6x || bfd_arch == bfd_arch_mn10300
1592 || bfd_arch == bfd_arch_rl78 || bfd_arch == bfd_arch_score
1593 || bfd_arch == bfd_arch_riscv)
1595 /* Raw registers. If raw registers are not in save_reggroup,
1596 their status are unknown. */
1597 if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup))
1598 SELF_CHECK (status == REG_VALID);
1600 SELF_CHECK (status == REG_UNKNOWN);
1603 SELF_CHECK (status == REG_VALID);
1607 if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup))
1608 SELF_CHECK (status == REG_VALID);
1611 /* If pseudo registers are not in save_reggroup, some of
1612 them can be computed from saved raw registers, but some
1613 of them are unknown. */
1614 auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch;
1616 if (bfd_arch == bfd_arch_frv
1617 || bfd_arch == bfd_arch_m32c
1618 || bfd_arch == bfd_arch_mep
1619 || bfd_arch == bfd_arch_sh)
1620 SELF_CHECK (status == REG_VALID || status == REG_UNKNOWN);
1621 else if (bfd_arch == bfd_arch_mips
1622 || bfd_arch == bfd_arch_h8300)
1623 SELF_CHECK (status == REG_UNKNOWN);
1625 SELF_CHECK (status == REG_VALID);
1629 SELF_CHECK (mock_target.fetch_registers_called == 0);
1630 SELF_CHECK (mock_target.store_registers_called == 0);
1631 SELF_CHECK (mock_target.xfer_partial_called == 0);
1633 mock_target.reset ();
1637 /* Test regcache::cooked_write by writing some expected contents to
1638 registers, and checking that contents read from registers and the
1639 expected contents are the same. */
1642 cooked_write_test (struct gdbarch *gdbarch)
1644 /* Error out if debugging something, because we're going to push the
1645 test target, which would pop any existing target. */
1646 if (target_stack->to_stratum >= process_stratum)
1647 error (_("target already pushed"));
1649 /* Create a mock environment. A process_stratum target pushed. */
1651 target_ops_no_register mock_target;
1653 /* Push the process_stratum target so we can mock accessing
1655 push_target (&mock_target);
1657 /* Pop it again on exit (return/exception). */
1662 pop_all_targets_at_and_above (process_stratum);
1666 readwrite_regcache readwrite (gdbarch);
1668 const int num_regs = (gdbarch_num_regs (gdbarch)
1669 + gdbarch_num_pseudo_regs (gdbarch));
1671 for (auto regnum = 0; regnum < num_regs; regnum++)
1673 if (register_size (gdbarch, regnum) == 0
1674 || gdbarch_cannot_store_register (gdbarch, regnum))
1677 auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch;
1679 if ((bfd_arch == bfd_arch_sparc
1680 /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM,
1681 SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */
1682 && gdbarch_ptr_bit (gdbarch) == 64
1683 && (regnum >= gdbarch_num_regs (gdbarch)
1684 && regnum <= gdbarch_num_regs (gdbarch) + 4))
1685 || (bfd_arch == bfd_arch_spu
1686 /* SPU pseudo registers except SPU_SP_REGNUM are got by
1687 TARGET_OBJECT_SPU. */
1688 && regnum >= gdbarch_num_regs (gdbarch) && regnum != 130))
1691 std::vector<gdb_byte> expected (register_size (gdbarch, regnum), 0);
1692 std::vector<gdb_byte> buf (register_size (gdbarch, regnum), 0);
1693 const auto type = register_type (gdbarch, regnum);
1695 if (TYPE_CODE (type) == TYPE_CODE_FLT
1696 || TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
1698 /* Generate valid float format. */
1699 target_float_from_string (expected.data (), type, "1.25");
1701 else if (TYPE_CODE (type) == TYPE_CODE_INT
1702 || TYPE_CODE (type) == TYPE_CODE_ARRAY
1703 || TYPE_CODE (type) == TYPE_CODE_PTR
1704 || TYPE_CODE (type) == TYPE_CODE_UNION
1705 || TYPE_CODE (type) == TYPE_CODE_STRUCT)
1707 if (bfd_arch == bfd_arch_ia64
1708 || (regnum >= gdbarch_num_regs (gdbarch)
1709 && (bfd_arch == bfd_arch_xtensa
1710 || bfd_arch == bfd_arch_bfin
1711 || bfd_arch == bfd_arch_m32c
1712 /* m68hc11 pseudo registers are in memory. */
1713 || bfd_arch == bfd_arch_m68hc11
1714 || bfd_arch == bfd_arch_m68hc12
1715 || bfd_arch == bfd_arch_s390))
1716 || (bfd_arch == bfd_arch_frv
1717 /* FRV pseudo registers except iacc0. */
1718 && regnum > gdbarch_num_regs (gdbarch)))
1720 /* Skip setting the expected values for some architecture
1723 else if (bfd_arch == bfd_arch_rl78 && regnum == 40)
1725 /* RL78_PC_REGNUM */
1726 for (auto j = 0; j < register_size (gdbarch, regnum) - 1; j++)
1731 for (auto j = 0; j < register_size (gdbarch, regnum); j++)
1735 else if (TYPE_CODE (type) == TYPE_CODE_FLAGS)
1737 /* No idea how to test flags. */
1742 /* If we don't know how to create the expected value for the
1743 this type, make it fail. */
1747 readwrite.cooked_write (regnum, expected.data ());
1749 SELF_CHECK (readwrite.cooked_read (regnum, buf.data ()) == REG_VALID);
1750 SELF_CHECK (expected == buf);
1754 } // namespace selftests
1755 #endif /* GDB_SELF_TEST */
1758 _initialize_regcache (void)
1760 regcache_descr_handle
1761 = gdbarch_data_register_post_init (init_regcache_descr);
1763 gdb::observers::target_changed.attach (regcache_observer_target_changed);
1764 gdb::observers::thread_ptid_changed.attach
1765 (regcache::regcache_thread_ptid_changed);
1767 add_com ("flushregs", class_maintenance, reg_flush_command,
1768 _("Force gdb to flush its register cache (maintainer command)"));
1771 selftests::register_test ("current_regcache", selftests::current_regcache_test);
1773 selftests::register_test_foreach_arch ("regcache::cooked_read_test",
1774 selftests::cooked_read_test);
1775 selftests::register_test_foreach_arch ("regcache::cooked_write_test",
1776 selftests::cooked_write_test);