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 (int regnum, int offset, int len,
878 gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers);
879 write_part (regnum, offset, len, buf, false);
882 /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */
885 regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf)
887 gdb_assert (regcache != NULL);
888 regcache->raw_supply (regnum, buf);
892 detached_regcache::raw_supply (int regnum, const void *buf)
897 assert_regnum (regnum);
899 regbuf = register_buffer (regnum);
900 size = m_descr->sizeof_register[regnum];
904 memcpy (regbuf, buf, size);
905 m_register_status[regnum] = REG_VALID;
909 /* This memset not strictly necessary, but better than garbage
910 in case the register value manages to escape somewhere (due
911 to a bug, no less). */
912 memset (regbuf, 0, size);
913 m_register_status[regnum] = REG_UNAVAILABLE;
917 /* Supply register REGNUM to REGCACHE. Value to supply is an integer stored at
918 address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED. If
919 the register size is greater than ADDR_LEN, then the integer will be sign or
920 zero extended. If the register size is smaller than the integer, then the
921 most significant bytes of the integer will be truncated. */
924 detached_regcache::raw_supply_integer (int regnum, const gdb_byte *addr,
925 int addr_len, bool is_signed)
927 enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch);
931 assert_regnum (regnum);
933 regbuf = register_buffer (regnum);
934 regsize = m_descr->sizeof_register[regnum];
936 copy_integer_to_size (regbuf, regsize, addr, addr_len, is_signed,
938 m_register_status[regnum] = REG_VALID;
941 /* Supply register REGNUM with zeroed value to REGCACHE. This is not the same
942 as calling raw_supply with NULL (which will set the state to
946 detached_regcache::raw_supply_zeroed (int regnum)
951 assert_regnum (regnum);
953 regbuf = register_buffer (regnum);
954 size = m_descr->sizeof_register[regnum];
956 memset (regbuf, 0, size);
957 m_register_status[regnum] = REG_VALID;
960 /* Collect register REGNUM from REGCACHE and store its contents in BUF. */
963 regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf)
965 gdb_assert (regcache != NULL && buf != NULL);
966 regcache->raw_collect (regnum, buf);
970 regcache::raw_collect (int regnum, void *buf) const
975 gdb_assert (buf != NULL);
976 assert_regnum (regnum);
978 regbuf = register_buffer (regnum);
979 size = m_descr->sizeof_register[regnum];
980 memcpy (buf, regbuf, size);
983 /* Transfer a single or all registers belonging to a certain register
984 set to or from a buffer. This is the main worker function for
985 regcache_supply_regset and regcache_collect_regset. */
987 /* Collect register REGNUM from REGCACHE. Store collected value as an integer
988 at address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED.
989 If ADDR_LEN is greater than the register size, then the integer will be sign
990 or zero extended. If ADDR_LEN is smaller than the register size, then the
991 most significant bytes of the integer will be truncated. */
994 regcache::raw_collect_integer (int regnum, gdb_byte *addr, int addr_len,
995 bool is_signed) const
997 enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch);
998 const gdb_byte *regbuf;
1001 assert_regnum (regnum);
1003 regbuf = register_buffer (regnum);
1004 regsize = m_descr->sizeof_register[regnum];
1006 copy_integer_to_size (addr, addr_len, regbuf, regsize, is_signed,
1011 regcache::transfer_regset (const struct regset *regset,
1012 struct regcache *out_regcache,
1013 int regnum, const void *in_buf,
1014 void *out_buf, size_t size) const
1016 const struct regcache_map_entry *map;
1017 int offs = 0, count;
1019 for (map = (const struct regcache_map_entry *) regset->regmap;
1020 (count = map->count) != 0;
1023 int regno = map->regno;
1024 int slot_size = map->size;
1026 if (slot_size == 0 && regno != REGCACHE_MAP_SKIP)
1027 slot_size = m_descr->sizeof_register[regno];
1029 if (regno == REGCACHE_MAP_SKIP
1031 && (regnum < regno || regnum >= regno + count)))
1032 offs += count * slot_size;
1034 else if (regnum == -1)
1035 for (; count--; regno++, offs += slot_size)
1037 if (offs + slot_size > size)
1041 raw_collect (regno, (gdb_byte *) out_buf + offs);
1043 out_regcache->raw_supply (regno, in_buf
1044 ? (const gdb_byte *) in_buf + offs
1049 /* Transfer a single register and return. */
1050 offs += (regnum - regno) * slot_size;
1051 if (offs + slot_size > size)
1055 raw_collect (regnum, (gdb_byte *) out_buf + offs);
1057 out_regcache->raw_supply (regnum, in_buf
1058 ? (const gdb_byte *) in_buf + offs
1065 /* Supply register REGNUM from BUF to REGCACHE, using the register map
1066 in REGSET. If REGNUM is -1, do this for all registers in REGSET.
1067 If BUF is NULL, set the register(s) to "unavailable" status. */
1070 regcache_supply_regset (const struct regset *regset,
1071 struct regcache *regcache,
1072 int regnum, const void *buf, size_t size)
1074 regcache->supply_regset (regset, regnum, buf, size);
1078 regcache::supply_regset (const struct regset *regset,
1079 int regnum, const void *buf, size_t size)
1081 transfer_regset (regset, this, regnum, buf, NULL, size);
1084 /* Collect register REGNUM from REGCACHE to BUF, using the register
1085 map in REGSET. If REGNUM is -1, do this for all registers in
1089 regcache_collect_regset (const struct regset *regset,
1090 const struct regcache *regcache,
1091 int regnum, void *buf, size_t size)
1093 regcache->collect_regset (regset, regnum, buf, size);
1097 regcache::collect_regset (const struct regset *regset,
1098 int regnum, void *buf, size_t size) const
1100 transfer_regset (regset, NULL, regnum, NULL, buf, size);
1104 /* Special handling for register PC. */
1107 regcache_read_pc (struct regcache *regcache)
1109 struct gdbarch *gdbarch = regcache->arch ();
1113 if (gdbarch_read_pc_p (gdbarch))
1114 pc_val = gdbarch_read_pc (gdbarch, regcache);
1115 /* Else use per-frame method on get_current_frame. */
1116 else if (gdbarch_pc_regnum (gdbarch) >= 0)
1120 if (regcache_cooked_read_unsigned (regcache,
1121 gdbarch_pc_regnum (gdbarch),
1122 &raw_val) == REG_UNAVAILABLE)
1123 throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available"));
1125 pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val);
1128 internal_error (__FILE__, __LINE__,
1129 _("regcache_read_pc: Unable to find PC"));
1134 regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
1136 struct gdbarch *gdbarch = regcache->arch ();
1138 if (gdbarch_write_pc_p (gdbarch))
1139 gdbarch_write_pc (gdbarch, regcache, pc);
1140 else if (gdbarch_pc_regnum (gdbarch) >= 0)
1141 regcache_cooked_write_unsigned (regcache,
1142 gdbarch_pc_regnum (gdbarch), pc);
1144 internal_error (__FILE__, __LINE__,
1145 _("regcache_write_pc: Unable to update PC"));
1147 /* Writing the PC (for instance, from "load") invalidates the
1149 reinit_frame_cache ();
1153 reg_buffer::num_raw_registers () const
1155 return gdbarch_num_regs (arch ());
1159 regcache::debug_print_register (const char *func, int regno)
1161 struct gdbarch *gdbarch = arch ();
1163 fprintf_unfiltered (gdb_stdlog, "%s ", func);
1164 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
1165 && gdbarch_register_name (gdbarch, regno) != NULL
1166 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
1167 fprintf_unfiltered (gdb_stdlog, "(%s)",
1168 gdbarch_register_name (gdbarch, regno));
1170 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
1171 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
1173 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1174 int size = register_size (gdbarch, regno);
1175 gdb_byte *buf = register_buffer (regno);
1177 fprintf_unfiltered (gdb_stdlog, " = ");
1178 for (int i = 0; i < size; i++)
1180 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
1182 if (size <= sizeof (LONGEST))
1184 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
1186 fprintf_unfiltered (gdb_stdlog, " %s %s",
1187 core_addr_to_string_nz (val), plongest (val));
1190 fprintf_unfiltered (gdb_stdlog, "\n");
1194 reg_flush_command (const char *command, int from_tty)
1196 /* Force-flush the register cache. */
1197 registers_changed ();
1199 printf_filtered (_("Register cache flushed.\n"));
1203 register_dump::dump (ui_file *file)
1205 auto descr = regcache_descr (m_gdbarch);
1207 int footnote_nr = 0;
1208 int footnote_register_offset = 0;
1209 int footnote_register_type_name_null = 0;
1210 long register_offset = 0;
1212 gdb_assert (descr->nr_cooked_registers
1213 == (gdbarch_num_regs (m_gdbarch)
1214 + gdbarch_num_pseudo_regs (m_gdbarch)));
1216 for (regnum = -1; regnum < descr->nr_cooked_registers; regnum++)
1220 fprintf_unfiltered (file, " %-10s", "Name");
1223 const char *p = gdbarch_register_name (m_gdbarch, regnum);
1227 else if (p[0] == '\0')
1229 fprintf_unfiltered (file, " %-10s", p);
1234 fprintf_unfiltered (file, " %4s", "Nr");
1236 fprintf_unfiltered (file, " %4d", regnum);
1238 /* Relative number. */
1240 fprintf_unfiltered (file, " %4s", "Rel");
1241 else if (regnum < gdbarch_num_regs (m_gdbarch))
1242 fprintf_unfiltered (file, " %4d", regnum);
1244 fprintf_unfiltered (file, " %4d",
1245 (regnum - gdbarch_num_regs (m_gdbarch)));
1249 fprintf_unfiltered (file, " %6s ", "Offset");
1252 fprintf_unfiltered (file, " %6ld",
1253 descr->register_offset[regnum]);
1254 if (register_offset != descr->register_offset[regnum]
1256 && (descr->register_offset[regnum]
1257 != (descr->register_offset[regnum - 1]
1258 + descr->sizeof_register[regnum - 1])))
1261 if (!footnote_register_offset)
1262 footnote_register_offset = ++footnote_nr;
1263 fprintf_unfiltered (file, "*%d", footnote_register_offset);
1266 fprintf_unfiltered (file, " ");
1267 register_offset = (descr->register_offset[regnum]
1268 + descr->sizeof_register[regnum]);
1273 fprintf_unfiltered (file, " %5s ", "Size");
1275 fprintf_unfiltered (file, " %5ld", descr->sizeof_register[regnum]);
1280 std::string name_holder;
1286 static const char blt[] = "builtin_type";
1288 t = TYPE_NAME (register_type (m_gdbarch, regnum));
1291 if (!footnote_register_type_name_null)
1292 footnote_register_type_name_null = ++footnote_nr;
1293 name_holder = string_printf ("*%d",
1294 footnote_register_type_name_null);
1295 t = name_holder.c_str ();
1297 /* Chop a leading builtin_type. */
1298 if (startswith (t, blt))
1301 fprintf_unfiltered (file, " %-15s", t);
1304 /* Leading space always present. */
1305 fprintf_unfiltered (file, " ");
1307 dump_reg (file, regnum);
1309 fprintf_unfiltered (file, "\n");
1312 if (footnote_register_offset)
1313 fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n",
1314 footnote_register_offset);
1315 if (footnote_register_type_name_null)
1316 fprintf_unfiltered (file,
1317 "*%d: Register type's name NULL.\n",
1318 footnote_register_type_name_null);
1322 #include "selftest.h"
1323 #include "selftest-arch.h"
1324 #include "gdbthread.h"
1325 #include "target-float.h"
1327 namespace selftests {
1329 class regcache_access : public regcache
1333 /* Return the number of elements in current_regcache. */
1336 current_regcache_size ()
1338 return std::distance (regcache::current_regcache.begin (),
1339 regcache::current_regcache.end ());
1344 current_regcache_test (void)
1346 /* It is empty at the start. */
1347 SELF_CHECK (regcache_access::current_regcache_size () == 0);
1349 ptid_t ptid1 (1), ptid2 (2), ptid3 (3);
1351 /* Get regcache from ptid1, a new regcache is added to
1352 current_regcache. */
1353 regcache *regcache = get_thread_arch_aspace_regcache (ptid1,
1357 SELF_CHECK (regcache != NULL);
1358 SELF_CHECK (regcache->ptid () == ptid1);
1359 SELF_CHECK (regcache_access::current_regcache_size () == 1);
1361 /* Get regcache from ptid2, a new regcache is added to
1362 current_regcache. */
1363 regcache = get_thread_arch_aspace_regcache (ptid2,
1366 SELF_CHECK (regcache != NULL);
1367 SELF_CHECK (regcache->ptid () == ptid2);
1368 SELF_CHECK (regcache_access::current_regcache_size () == 2);
1370 /* Get regcache from ptid3, a new regcache is added to
1371 current_regcache. */
1372 regcache = get_thread_arch_aspace_regcache (ptid3,
1375 SELF_CHECK (regcache != NULL);
1376 SELF_CHECK (regcache->ptid () == ptid3);
1377 SELF_CHECK (regcache_access::current_regcache_size () == 3);
1379 /* Get regcache from ptid2 again, nothing is added to
1380 current_regcache. */
1381 regcache = get_thread_arch_aspace_regcache (ptid2,
1384 SELF_CHECK (regcache != NULL);
1385 SELF_CHECK (regcache->ptid () == ptid2);
1386 SELF_CHECK (regcache_access::current_regcache_size () == 3);
1388 /* Mark ptid2 is changed, so regcache of ptid2 should be removed from
1389 current_regcache. */
1390 registers_changed_ptid (ptid2);
1391 SELF_CHECK (regcache_access::current_regcache_size () == 2);
1394 class target_ops_no_register : public test_target_ops
1397 target_ops_no_register ()
1398 : test_target_ops {}
1403 fetch_registers_called = 0;
1404 store_registers_called = 0;
1405 xfer_partial_called = 0;
1408 void fetch_registers (regcache *regs, int regno) override;
1409 void store_registers (regcache *regs, int regno) override;
1411 enum target_xfer_status xfer_partial (enum target_object object,
1412 const char *annex, gdb_byte *readbuf,
1413 const gdb_byte *writebuf,
1414 ULONGEST offset, ULONGEST len,
1415 ULONGEST *xfered_len) override;
1417 unsigned int fetch_registers_called = 0;
1418 unsigned int store_registers_called = 0;
1419 unsigned int xfer_partial_called = 0;
1423 target_ops_no_register::fetch_registers (regcache *regs, int regno)
1425 /* Mark register available. */
1426 regs->raw_supply_zeroed (regno);
1427 this->fetch_registers_called++;
1431 target_ops_no_register::store_registers (regcache *regs, int regno)
1433 this->store_registers_called++;
1436 enum target_xfer_status
1437 target_ops_no_register::xfer_partial (enum target_object object,
1438 const char *annex, gdb_byte *readbuf,
1439 const gdb_byte *writebuf,
1440 ULONGEST offset, ULONGEST len,
1441 ULONGEST *xfered_len)
1443 this->xfer_partial_called++;
1446 return TARGET_XFER_OK;
1449 class readwrite_regcache : public regcache
1452 readwrite_regcache (struct gdbarch *gdbarch)
1453 : regcache (gdbarch, nullptr)
1457 /* Test regcache::cooked_read gets registers from raw registers and
1458 memory instead of target to_{fetch,store}_registers. */
1461 cooked_read_test (struct gdbarch *gdbarch)
1463 /* Error out if debugging something, because we're going to push the
1464 test target, which would pop any existing target. */
1465 if (target_stack->to_stratum >= process_stratum)
1466 error (_("target already pushed"));
1468 /* Create a mock environment. An inferior with a thread, with a
1469 process_stratum target pushed. */
1471 target_ops_no_register mock_target;
1472 ptid_t mock_ptid (1, 1);
1473 inferior mock_inferior (mock_ptid.pid ());
1474 address_space mock_aspace {};
1475 mock_inferior.gdbarch = gdbarch;
1476 mock_inferior.aspace = &mock_aspace;
1477 thread_info mock_thread (&mock_inferior, mock_ptid);
1479 scoped_restore restore_thread_list
1480 = make_scoped_restore (&thread_list, &mock_thread);
1482 /* Add the mock inferior to the inferior list so that look ups by
1483 target+ptid can find it. */
1484 scoped_restore restore_inferior_list
1485 = make_scoped_restore (&inferior_list);
1486 inferior_list = &mock_inferior;
1488 /* Switch to the mock inferior. */
1489 scoped_restore_current_inferior restore_current_inferior;
1490 set_current_inferior (&mock_inferior);
1492 /* Push the process_stratum target so we can mock accessing
1494 push_target (&mock_target);
1496 /* Pop it again on exit (return/exception). */
1501 pop_all_targets_at_and_above (process_stratum);
1505 /* Switch to the mock thread. */
1506 scoped_restore restore_inferior_ptid
1507 = make_scoped_restore (&inferior_ptid, mock_ptid);
1509 /* Test that read one raw register from regcache_no_target will go
1510 to the target layer. */
1513 /* Find a raw register which size isn't zero. */
1514 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
1516 if (register_size (gdbarch, regnum) != 0)
1520 readwrite_regcache readwrite (gdbarch);
1521 gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum));
1523 readwrite.raw_read (regnum, buf.data ());
1525 /* raw_read calls target_fetch_registers. */
1526 SELF_CHECK (mock_target.fetch_registers_called > 0);
1527 mock_target.reset ();
1529 /* Mark all raw registers valid, so the following raw registers
1530 accesses won't go to target. */
1531 for (auto i = 0; i < gdbarch_num_regs (gdbarch); i++)
1532 readwrite.raw_update (i);
1534 mock_target.reset ();
1535 /* Then, read all raw and pseudo registers, and don't expect calling
1536 to_{fetch,store}_registers. */
1537 for (int regnum = 0;
1538 regnum < gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch);
1541 if (register_size (gdbarch, regnum) == 0)
1544 gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum));
1546 SELF_CHECK (REG_VALID == readwrite.cooked_read (regnum, buf.data ()));
1548 SELF_CHECK (mock_target.fetch_registers_called == 0);
1549 SELF_CHECK (mock_target.store_registers_called == 0);
1551 /* Some SPU pseudo registers are got via TARGET_OBJECT_SPU. */
1552 if (gdbarch_bfd_arch_info (gdbarch)->arch != bfd_arch_spu)
1553 SELF_CHECK (mock_target.xfer_partial_called == 0);
1555 mock_target.reset ();
1558 readonly_detached_regcache readonly (readwrite);
1560 /* GDB may go to target layer to fetch all registers and memory for
1561 readonly regcache. */
1562 mock_target.reset ();
1564 for (int regnum = 0;
1565 regnum < gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch);
1568 if (register_size (gdbarch, regnum) == 0)
1571 gdb::def_vector<gdb_byte> buf (register_size (gdbarch, regnum));
1572 enum register_status status = readonly.cooked_read (regnum,
1575 if (regnum < gdbarch_num_regs (gdbarch))
1577 auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch;
1579 if (bfd_arch == bfd_arch_frv || bfd_arch == bfd_arch_h8300
1580 || bfd_arch == bfd_arch_m32c || bfd_arch == bfd_arch_sh
1581 || bfd_arch == bfd_arch_alpha || bfd_arch == bfd_arch_v850
1582 || bfd_arch == bfd_arch_msp430 || bfd_arch == bfd_arch_mep
1583 || bfd_arch == bfd_arch_mips || bfd_arch == bfd_arch_v850_rh850
1584 || bfd_arch == bfd_arch_tic6x || bfd_arch == bfd_arch_mn10300
1585 || bfd_arch == bfd_arch_rl78 || bfd_arch == bfd_arch_score
1586 || bfd_arch == bfd_arch_riscv)
1588 /* Raw registers. If raw registers are not in save_reggroup,
1589 their status are unknown. */
1590 if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup))
1591 SELF_CHECK (status == REG_VALID);
1593 SELF_CHECK (status == REG_UNKNOWN);
1596 SELF_CHECK (status == REG_VALID);
1600 if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup))
1601 SELF_CHECK (status == REG_VALID);
1604 /* If pseudo registers are not in save_reggroup, some of
1605 them can be computed from saved raw registers, but some
1606 of them are unknown. */
1607 auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch;
1609 if (bfd_arch == bfd_arch_frv
1610 || bfd_arch == bfd_arch_m32c
1611 || bfd_arch == bfd_arch_mep
1612 || bfd_arch == bfd_arch_sh)
1613 SELF_CHECK (status == REG_VALID || status == REG_UNKNOWN);
1614 else if (bfd_arch == bfd_arch_mips
1615 || bfd_arch == bfd_arch_h8300)
1616 SELF_CHECK (status == REG_UNKNOWN);
1618 SELF_CHECK (status == REG_VALID);
1622 SELF_CHECK (mock_target.fetch_registers_called == 0);
1623 SELF_CHECK (mock_target.store_registers_called == 0);
1624 SELF_CHECK (mock_target.xfer_partial_called == 0);
1626 mock_target.reset ();
1630 /* Test regcache::cooked_write by writing some expected contents to
1631 registers, and checking that contents read from registers and the
1632 expected contents are the same. */
1635 cooked_write_test (struct gdbarch *gdbarch)
1637 /* Error out if debugging something, because we're going to push the
1638 test target, which would pop any existing target. */
1639 if (target_stack->to_stratum >= process_stratum)
1640 error (_("target already pushed"));
1642 /* Create a mock environment. A process_stratum target pushed. */
1644 target_ops_no_register mock_target;
1646 /* Push the process_stratum target so we can mock accessing
1648 push_target (&mock_target);
1650 /* Pop it again on exit (return/exception). */
1655 pop_all_targets_at_and_above (process_stratum);
1659 readwrite_regcache readwrite (gdbarch);
1661 const int num_regs = (gdbarch_num_regs (gdbarch)
1662 + gdbarch_num_pseudo_regs (gdbarch));
1664 for (auto regnum = 0; regnum < num_regs; regnum++)
1666 if (register_size (gdbarch, regnum) == 0
1667 || gdbarch_cannot_store_register (gdbarch, regnum))
1670 auto bfd_arch = gdbarch_bfd_arch_info (gdbarch)->arch;
1672 if ((bfd_arch == bfd_arch_sparc
1673 /* SPARC64_CWP_REGNUM, SPARC64_PSTATE_REGNUM,
1674 SPARC64_ASI_REGNUM and SPARC64_CCR_REGNUM are hard to test. */
1675 && gdbarch_ptr_bit (gdbarch) == 64
1676 && (regnum >= gdbarch_num_regs (gdbarch)
1677 && regnum <= gdbarch_num_regs (gdbarch) + 4))
1678 || (bfd_arch == bfd_arch_spu
1679 /* SPU pseudo registers except SPU_SP_REGNUM are got by
1680 TARGET_OBJECT_SPU. */
1681 && regnum >= gdbarch_num_regs (gdbarch) && regnum != 130))
1684 std::vector<gdb_byte> expected (register_size (gdbarch, regnum), 0);
1685 std::vector<gdb_byte> buf (register_size (gdbarch, regnum), 0);
1686 const auto type = register_type (gdbarch, regnum);
1688 if (TYPE_CODE (type) == TYPE_CODE_FLT
1689 || TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
1691 /* Generate valid float format. */
1692 target_float_from_string (expected.data (), type, "1.25");
1694 else if (TYPE_CODE (type) == TYPE_CODE_INT
1695 || TYPE_CODE (type) == TYPE_CODE_ARRAY
1696 || TYPE_CODE (type) == TYPE_CODE_PTR
1697 || TYPE_CODE (type) == TYPE_CODE_UNION
1698 || TYPE_CODE (type) == TYPE_CODE_STRUCT)
1700 if (bfd_arch == bfd_arch_ia64
1701 || (regnum >= gdbarch_num_regs (gdbarch)
1702 && (bfd_arch == bfd_arch_xtensa
1703 || bfd_arch == bfd_arch_bfin
1704 || bfd_arch == bfd_arch_m32c
1705 /* m68hc11 pseudo registers are in memory. */
1706 || bfd_arch == bfd_arch_m68hc11
1707 || bfd_arch == bfd_arch_m68hc12
1708 || bfd_arch == bfd_arch_s390))
1709 || (bfd_arch == bfd_arch_frv
1710 /* FRV pseudo registers except iacc0. */
1711 && regnum > gdbarch_num_regs (gdbarch)))
1713 /* Skip setting the expected values for some architecture
1716 else if (bfd_arch == bfd_arch_rl78 && regnum == 40)
1718 /* RL78_PC_REGNUM */
1719 for (auto j = 0; j < register_size (gdbarch, regnum) - 1; j++)
1724 for (auto j = 0; j < register_size (gdbarch, regnum); j++)
1728 else if (TYPE_CODE (type) == TYPE_CODE_FLAGS)
1730 /* No idea how to test flags. */
1735 /* If we don't know how to create the expected value for the
1736 this type, make it fail. */
1740 readwrite.cooked_write (regnum, expected.data ());
1742 SELF_CHECK (readwrite.cooked_read (regnum, buf.data ()) == REG_VALID);
1743 SELF_CHECK (expected == buf);
1747 } // namespace selftests
1748 #endif /* GDB_SELF_TEST */
1751 _initialize_regcache (void)
1753 regcache_descr_handle
1754 = gdbarch_data_register_post_init (init_regcache_descr);
1756 gdb::observers::target_changed.attach (regcache_observer_target_changed);
1757 gdb::observers::thread_ptid_changed.attach
1758 (regcache::regcache_thread_ptid_changed);
1760 add_com ("flushregs", class_maintenance, reg_flush_command,
1761 _("Force gdb to flush its register cache (maintainer command)"));
1764 selftests::register_test ("current_regcache", selftests::current_regcache_test);
1766 selftests::register_test_foreach_arch ("regcache::cooked_read_test",
1767 selftests::cooked_read_test);
1768 selftests::register_test_foreach_arch ("regcache::cooked_write_test",
1769 selftests::cooked_write_test);