| /* Cache and manage the values of registers for GDB, the GNU debugger. |
| |
| Copyright (C) 1986-2017 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "inferior.h" |
| #include "target.h" |
| #include "gdbarch.h" |
| #include "gdbcmd.h" |
| #include "regcache.h" |
| #include "reggroups.h" |
| #include "observer.h" |
| #include "remote.h" |
| #include "valprint.h" |
| #include "regset.h" |
| #include <forward_list> |
| |
| /* |
| * DATA STRUCTURE |
| * |
| * Here is the actual register cache. |
| */ |
| |
| /* Per-architecture object describing the layout of a register cache. |
| Computed once when the architecture is created. */ |
| |
| struct gdbarch_data *regcache_descr_handle; |
| |
| struct regcache_descr |
| { |
| /* The architecture this descriptor belongs to. */ |
| struct gdbarch *gdbarch; |
| |
| /* The raw register cache. Each raw (or hard) register is supplied |
| by the target interface. The raw cache should not contain |
| redundant information - if the PC is constructed from two |
| registers then those registers and not the PC lives in the raw |
| cache. */ |
| int nr_raw_registers; |
| long sizeof_raw_registers; |
| long sizeof_raw_register_status; |
| |
| /* The cooked register space. Each cooked register in the range |
| [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw |
| register. The remaining [NR_RAW_REGISTERS |
| .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto |
| both raw registers and memory by the architecture methods |
| gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ |
| int nr_cooked_registers; |
| long sizeof_cooked_registers; |
| long sizeof_cooked_register_status; |
| |
| /* Offset and size (in 8 bit bytes), of each register in the |
| register cache. All registers (including those in the range |
| [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an |
| offset. */ |
| long *register_offset; |
| long *sizeof_register; |
| |
| /* Cached table containing the type of each register. */ |
| struct type **register_type; |
| }; |
| |
| static void * |
| init_regcache_descr (struct gdbarch *gdbarch) |
| { |
| int i; |
| struct regcache_descr *descr; |
| gdb_assert (gdbarch != NULL); |
| |
| /* Create an initial, zero filled, table. */ |
| descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); |
| descr->gdbarch = gdbarch; |
| |
| /* Total size of the register space. The raw registers are mapped |
| directly onto the raw register cache while the pseudo's are |
| either mapped onto raw-registers or memory. */ |
| descr->nr_cooked_registers = gdbarch_num_regs (gdbarch) |
| + gdbarch_num_pseudo_regs (gdbarch); |
| descr->sizeof_cooked_register_status |
| = gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch); |
| |
| /* Fill in a table of register types. */ |
| descr->register_type |
| = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, |
| struct type *); |
| for (i = 0; i < descr->nr_cooked_registers; i++) |
| descr->register_type[i] = gdbarch_register_type (gdbarch, i); |
| |
| /* Construct a strictly RAW register cache. Don't allow pseudo's |
| into the register cache. */ |
| descr->nr_raw_registers = gdbarch_num_regs (gdbarch); |
| descr->sizeof_raw_register_status = gdbarch_num_regs (gdbarch); |
| |
| /* Lay out the register cache. |
| |
| NOTE: cagney/2002-05-22: Only register_type() is used when |
| constructing the register cache. It is assumed that the |
| register's raw size, virtual size and type length are all the |
| same. */ |
| |
| { |
| long offset = 0; |
| |
| descr->sizeof_register |
| = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| descr->register_offset |
| = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); |
| for (i = 0; i < descr->nr_raw_registers; i++) |
| { |
| descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
| descr->register_offset[i] = offset; |
| offset += descr->sizeof_register[i]; |
| gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
| } |
| /* Set the real size of the raw register cache buffer. */ |
| descr->sizeof_raw_registers = offset; |
| |
| for (; i < descr->nr_cooked_registers; i++) |
| { |
| descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); |
| descr->register_offset[i] = offset; |
| offset += descr->sizeof_register[i]; |
| gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); |
| } |
| /* Set the real size of the readonly register cache buffer. */ |
| descr->sizeof_cooked_registers = offset; |
| } |
| |
| return descr; |
| } |
| |
| static struct regcache_descr * |
| regcache_descr (struct gdbarch *gdbarch) |
| { |
| return (struct regcache_descr *) gdbarch_data (gdbarch, |
| regcache_descr_handle); |
| } |
| |
| /* Utility functions returning useful register attributes stored in |
| the regcache descr. */ |
| |
| struct type * |
| register_type (struct gdbarch *gdbarch, int regnum) |
| { |
| struct regcache_descr *descr = regcache_descr (gdbarch); |
| |
| gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); |
| return descr->register_type[regnum]; |
| } |
| |
| /* Utility functions returning useful register attributes stored in |
| the regcache descr. */ |
| |
| int |
| register_size (struct gdbarch *gdbarch, int regnum) |
| { |
| struct regcache_descr *descr = regcache_descr (gdbarch); |
| int size; |
| |
| gdb_assert (regnum >= 0 |
| && regnum < (gdbarch_num_regs (gdbarch) |
| + gdbarch_num_pseudo_regs (gdbarch))); |
| size = descr->sizeof_register[regnum]; |
| return size; |
| } |
| |
| /* See common/common-regcache.h. */ |
| |
| int |
| regcache_register_size (const struct regcache *regcache, int n) |
| { |
| return register_size (get_regcache_arch (regcache), n); |
| } |
| |
| regcache::regcache (gdbarch *gdbarch, address_space *aspace_, |
| bool readonly_p_) |
| : m_aspace (aspace_), m_readonly_p (readonly_p_) |
| { |
| gdb_assert (gdbarch != NULL); |
| m_descr = regcache_descr (gdbarch); |
| |
| if (m_readonly_p) |
| { |
| m_registers = XCNEWVEC (gdb_byte, m_descr->sizeof_cooked_registers); |
| m_register_status = XCNEWVEC (signed char, |
| m_descr->sizeof_cooked_register_status); |
| } |
| else |
| { |
| m_registers = XCNEWVEC (gdb_byte, m_descr->sizeof_raw_registers); |
| m_register_status = XCNEWVEC (signed char, |
| m_descr->sizeof_raw_register_status); |
| } |
| m_ptid = minus_one_ptid; |
| } |
| |
| static enum register_status |
| do_cooked_read (void *src, int regnum, gdb_byte *buf) |
| { |
| struct regcache *regcache = (struct regcache *) src; |
| |
| return regcache_cooked_read (regcache, regnum, buf); |
| } |
| |
| regcache::regcache (readonly_t, const regcache &src) |
| : regcache (src.arch (), src.aspace (), true) |
| { |
| gdb_assert (!src.m_readonly_p); |
| save (do_cooked_read, (void *) &src); |
| } |
| |
| gdbarch * |
| regcache::arch () const |
| { |
| return m_descr->gdbarch; |
| } |
| |
| /* See regcache.h. */ |
| |
| ptid_t |
| regcache_get_ptid (const struct regcache *regcache) |
| { |
| gdb_assert (!ptid_equal (regcache->ptid (), minus_one_ptid)); |
| |
| return regcache->ptid (); |
| } |
| |
| struct regcache * |
| regcache_xmalloc (struct gdbarch *gdbarch, struct address_space *aspace) |
| { |
| return new regcache (gdbarch, aspace); |
| } |
| |
| void |
| regcache_xfree (struct regcache *regcache) |
| { |
| if (regcache == NULL) |
| return; |
| |
| delete regcache; |
| } |
| |
| static void |
| do_regcache_xfree (void *data) |
| { |
| regcache_xfree ((struct regcache *) data); |
| } |
| |
| struct cleanup * |
| make_cleanup_regcache_xfree (struct regcache *regcache) |
| { |
| return make_cleanup (do_regcache_xfree, regcache); |
| } |
| |
| /* Cleanup routines for invalidating a register. */ |
| |
| struct register_to_invalidate |
| { |
| struct regcache *regcache; |
| int regnum; |
| }; |
| |
| static void |
| do_regcache_invalidate (void *data) |
| { |
| struct register_to_invalidate *reg = (struct register_to_invalidate *) data; |
| |
| regcache_invalidate (reg->regcache, reg->regnum); |
| } |
| |
| static struct cleanup * |
| make_cleanup_regcache_invalidate (struct regcache *regcache, int regnum) |
| { |
| struct register_to_invalidate* reg = XNEW (struct register_to_invalidate); |
| |
| reg->regcache = regcache; |
| reg->regnum = regnum; |
| return make_cleanup_dtor (do_regcache_invalidate, (void *) reg, xfree); |
| } |
| |
| /* Return REGCACHE's architecture. */ |
| |
| struct gdbarch * |
| get_regcache_arch (const struct regcache *regcache) |
| { |
| return regcache->arch (); |
| } |
| |
| struct address_space * |
| get_regcache_aspace (const struct regcache *regcache) |
| { |
| return regcache->aspace (); |
| } |
| |
| /* Return a pointer to register REGNUM's buffer cache. */ |
| |
| gdb_byte * |
| regcache::register_buffer (int regnum) const |
| { |
| return m_registers + m_descr->register_offset[regnum]; |
| } |
| |
| void |
| regcache_save (struct regcache *regcache, |
| regcache_cooked_read_ftype *cooked_read, void *src) |
| { |
| regcache->save (cooked_read, src); |
| } |
| |
| void |
| regcache::save (regcache_cooked_read_ftype *cooked_read, |
| void *src) |
| { |
| struct gdbarch *gdbarch = m_descr->gdbarch; |
| int regnum; |
| |
| /* The DST should be `read-only', if it wasn't then the save would |
| end up trying to write the register values back out to the |
| target. */ |
| gdb_assert (m_readonly_p); |
| /* Clear the dest. */ |
| memset (m_registers, 0, m_descr->sizeof_cooked_registers); |
| memset (m_register_status, 0, m_descr->sizeof_cooked_register_status); |
| /* Copy over any registers (identified by their membership in the |
| save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + |
| gdbarch_num_pseudo_regs) range is checked since some architectures need |
| to save/restore `cooked' registers that live in memory. */ |
| for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
| { |
| if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) |
| { |
| gdb_byte *dst_buf = register_buffer (regnum); |
| enum register_status status = cooked_read (src, regnum, dst_buf); |
| |
| gdb_assert (status != REG_UNKNOWN); |
| |
| if (status != REG_VALID) |
| memset (dst_buf, 0, register_size (gdbarch, regnum)); |
| |
| m_register_status[regnum] = status; |
| } |
| } |
| } |
| |
| void |
| regcache::restore (struct regcache *src) |
| { |
| struct gdbarch *gdbarch = m_descr->gdbarch; |
| int regnum; |
| |
| /* The dst had better not be read-only. If it is, the `restore' |
| doesn't make much sense. */ |
| gdb_assert (!m_readonly_p); |
| gdb_assert (src->m_readonly_p); |
| /* Copy over any registers, being careful to only restore those that |
| were both saved and need to be restored. The full [0 .. gdbarch_num_regs |
| + gdbarch_num_pseudo_regs) range is checked since some architectures need |
| to save/restore `cooked' registers that live in memory. */ |
| for (regnum = 0; regnum < m_descr->nr_cooked_registers; regnum++) |
| { |
| if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) |
| { |
| if (src->m_register_status[regnum] == REG_VALID) |
| cooked_write (regnum, src->register_buffer (regnum)); |
| } |
| } |
| } |
| |
| void |
| regcache_cpy (struct regcache *dst, struct regcache *src) |
| { |
| gdb_assert (src != NULL && dst != NULL); |
| gdb_assert (src->m_descr->gdbarch == dst->m_descr->gdbarch); |
| gdb_assert (src != dst); |
| gdb_assert (src->m_readonly_p || dst->m_readonly_p); |
| |
| if (!src->m_readonly_p) |
| regcache_save (dst, do_cooked_read, src); |
| else if (!dst->m_readonly_p) |
| dst->restore (src); |
| else |
| dst->cpy_no_passthrough (src); |
| } |
| |
| /* Copy/duplicate the contents of a register cache. Unlike regcache_cpy, |
| which is pass-through, this does not go through to the target. |
| Only values values already in the cache are transferred. The SRC and DST |
| buffers must not overlap. */ |
| |
| void |
| regcache::cpy_no_passthrough (struct regcache *src) |
| { |
| gdb_assert (src != NULL); |
| gdb_assert (src->m_descr->gdbarch == m_descr->gdbarch); |
| /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough |
| move of data into a thread's regcache. Doing this would be silly |
| - it would mean that regcache->register_status would be |
| completely invalid. */ |
| gdb_assert (m_readonly_p && src->m_readonly_p); |
| |
| memcpy (m_registers, src->m_registers, |
| m_descr->sizeof_cooked_registers); |
| memcpy (m_register_status, src->m_register_status, |
| m_descr->sizeof_cooked_register_status); |
| } |
| |
| struct regcache * |
| regcache_dup (struct regcache *src) |
| { |
| return new regcache (regcache::readonly, *src); |
| } |
| |
| enum register_status |
| regcache_register_status (const struct regcache *regcache, int regnum) |
| { |
| gdb_assert (regcache != NULL); |
| return regcache->get_register_status (regnum); |
| } |
| |
| enum register_status |
| regcache::get_register_status (int regnum) const |
| { |
| gdb_assert (regnum >= 0); |
| if (m_readonly_p) |
| gdb_assert (regnum < m_descr->nr_cooked_registers); |
| else |
| gdb_assert (regnum < m_descr->nr_raw_registers); |
| |
| return (enum register_status) m_register_status[regnum]; |
| } |
| |
| void |
| regcache_invalidate (struct regcache *regcache, int regnum) |
| { |
| gdb_assert (regcache != NULL); |
| regcache->invalidate (regnum); |
| } |
| |
| void |
| regcache::invalidate (int regnum) |
| { |
| gdb_assert (regnum >= 0); |
| gdb_assert (!m_readonly_p); |
| gdb_assert (regnum < m_descr->nr_raw_registers); |
| m_register_status[regnum] = REG_UNKNOWN; |
| } |
| |
| /* Global structure containing the current regcache. */ |
| |
| /* NOTE: this is a write-through cache. There is no "dirty" bit for |
| recording if the register values have been changed (eg. by the |
| user). Therefore all registers must be written back to the |
| target when appropriate. */ |
| std::forward_list<regcache *> regcache::current_regcache; |
| |
| struct regcache * |
| get_thread_arch_aspace_regcache (ptid_t ptid, struct gdbarch *gdbarch, |
| struct address_space *aspace) |
| { |
| for (const auto ®cache : regcache::current_regcache) |
| if (ptid_equal (regcache->ptid (), ptid) && regcache->arch () == gdbarch) |
| return regcache; |
| |
| regcache *new_regcache = new regcache (gdbarch, aspace, false); |
| |
| regcache::current_regcache.push_front (new_regcache); |
| new_regcache->set_ptid (ptid); |
| |
| return new_regcache; |
| } |
| |
| struct regcache * |
| get_thread_arch_regcache (ptid_t ptid, struct gdbarch *gdbarch) |
| { |
| struct address_space *aspace; |
| |
| /* For the benefit of "maint print registers" & co when debugging an |
| executable, allow dumping the regcache even when there is no |
| thread selected (target_thread_address_space internal-errors if |
| no address space is found). Note that normal user commands will |
| fail higher up on the call stack due to no |
| target_has_registers. */ |
| aspace = (ptid_equal (null_ptid, ptid) |
| ? NULL |
| : target_thread_address_space (ptid)); |
| |
| return get_thread_arch_aspace_regcache (ptid, gdbarch, aspace); |
| } |
| |
| static ptid_t current_thread_ptid; |
| static struct gdbarch *current_thread_arch; |
| |
| struct regcache * |
| get_thread_regcache (ptid_t ptid) |
| { |
| if (!current_thread_arch || !ptid_equal (current_thread_ptid, ptid)) |
| { |
| current_thread_ptid = ptid; |
| current_thread_arch = target_thread_architecture (ptid); |
| } |
| |
| return get_thread_arch_regcache (ptid, current_thread_arch); |
| } |
| |
| struct regcache * |
| get_current_regcache (void) |
| { |
| return get_thread_regcache (inferior_ptid); |
| } |
| |
| /* See common/common-regcache.h. */ |
| |
| struct regcache * |
| get_thread_regcache_for_ptid (ptid_t ptid) |
| { |
| return get_thread_regcache (ptid); |
| } |
| |
| /* Observer for the target_changed event. */ |
| |
| static void |
| regcache_observer_target_changed (struct target_ops *target) |
| { |
| registers_changed (); |
| } |
| |
| /* Update global variables old ptids to hold NEW_PTID if they were |
| holding OLD_PTID. */ |
| void |
| regcache::regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid) |
| { |
| for (auto ®cache : regcache::current_regcache) |
| { |
| if (ptid_equal (regcache->ptid (), old_ptid)) |
| regcache->set_ptid (new_ptid); |
| } |
| } |
| |
| /* Low level examining and depositing of registers. |
| |
| The caller is responsible for making sure that the inferior is |
| stopped before calling the fetching routines, or it will get |
| garbage. (a change from GDB version 3, in which the caller got the |
| value from the last stop). */ |
| |
| /* REGISTERS_CHANGED () |
| |
| Indicate that registers may have changed, so invalidate the cache. */ |
| |
| void |
| registers_changed_ptid (ptid_t ptid) |
| { |
| for (auto oit = regcache::current_regcache.before_begin (), |
| it = std::next (oit); |
| it != regcache::current_regcache.end (); |
| ) |
| { |
| if (ptid_match ((*it)->ptid (), ptid)) |
| { |
| delete *it; |
| it = regcache::current_regcache.erase_after (oit); |
| } |
| else |
| oit = it++; |
| } |
| |
| if (ptid_match (current_thread_ptid, ptid)) |
| { |
| current_thread_ptid = null_ptid; |
| current_thread_arch = NULL; |
| } |
| |
| if (ptid_match (inferior_ptid, ptid)) |
| { |
| /* We just deleted the regcache of the current thread. Need to |
| forget about any frames we have cached, too. */ |
| reinit_frame_cache (); |
| } |
| } |
| |
| void |
| registers_changed (void) |
| { |
| registers_changed_ptid (minus_one_ptid); |
| |
| /* Force cleanup of any alloca areas if using C alloca instead of |
| a builtin alloca. This particular call is used to clean up |
| areas allocated by low level target code which may build up |
| during lengthy interactions between gdb and the target before |
| gdb gives control to the user (ie watchpoints). */ |
| alloca (0); |
| } |
| |
| void |
| regcache_raw_update (struct regcache *regcache, int regnum) |
| { |
| gdb_assert (regcache != NULL); |
| |
| regcache->raw_update (regnum); |
| } |
| |
| void |
| regcache::raw_update (int regnum) |
| { |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers); |
| |
| /* Make certain that the register cache is up-to-date with respect |
| to the current thread. This switching shouldn't be necessary |
| only there is still only one target side register cache. Sigh! |
| On the bright side, at least there is a regcache object. */ |
| |
| if (!m_readonly_p && get_register_status (regnum) == REG_UNKNOWN) |
| { |
| target_fetch_registers (this, regnum); |
| |
| /* A number of targets can't access the whole set of raw |
| registers (because the debug API provides no means to get at |
| them). */ |
| if (m_register_status[regnum] == REG_UNKNOWN) |
| m_register_status[regnum] = REG_UNAVAILABLE; |
| } |
| } |
| |
| enum register_status |
| regcache_raw_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
| { |
| return regcache->raw_read (regnum, buf); |
| } |
| |
| enum register_status |
| regcache::raw_read (int regnum, gdb_byte *buf) |
| { |
| gdb_assert (buf != NULL); |
| raw_update (regnum); |
| |
| if (m_register_status[regnum] != REG_VALID) |
| memset (buf, 0, m_descr->sizeof_register[regnum]); |
| else |
| memcpy (buf, register_buffer (regnum), |
| m_descr->sizeof_register[regnum]); |
| |
| return (enum register_status) m_register_status[regnum]; |
| } |
| |
| enum register_status |
| regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val) |
| { |
| gdb_assert (regcache != NULL); |
| return regcache->raw_read (regnum, val); |
| } |
| |
| template<typename T, typename> |
| enum register_status |
| regcache::raw_read (int regnum, T *val) |
| { |
| gdb_byte *buf; |
| enum register_status status; |
| |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers); |
| buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
| status = raw_read (regnum, buf); |
| if (status == REG_VALID) |
| *val = extract_integer<T> (buf, |
| m_descr->sizeof_register[regnum], |
| gdbarch_byte_order (m_descr->gdbarch)); |
| else |
| *val = 0; |
| return status; |
| } |
| |
| enum register_status |
| regcache_raw_read_unsigned (struct regcache *regcache, int regnum, |
| ULONGEST *val) |
| { |
| gdb_assert (regcache != NULL); |
| return regcache->raw_read (regnum, val); |
| } |
| |
| void |
| regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) |
| { |
| gdb_assert (regcache != NULL); |
| regcache->raw_write (regnum, val); |
| } |
| |
| template<typename T, typename> |
| void |
| regcache::raw_write (int regnum, T val) |
| { |
| gdb_byte *buf; |
| |
| gdb_assert (regnum >=0 && regnum < m_descr->nr_raw_registers); |
| buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
| store_integer (buf, m_descr->sizeof_register[regnum], |
| gdbarch_byte_order (m_descr->gdbarch), val); |
| raw_write (regnum, buf); |
| } |
| |
| void |
| regcache_raw_write_unsigned (struct regcache *regcache, int regnum, |
| ULONGEST val) |
| { |
| gdb_assert (regcache != NULL); |
| regcache->raw_write (regnum, val); |
| } |
| |
| LONGEST |
| regcache_raw_get_signed (struct regcache *regcache, int regnum) |
| { |
| LONGEST value; |
| enum register_status status; |
| |
| status = regcache_raw_read_signed (regcache, regnum, &value); |
| if (status == REG_UNAVAILABLE) |
| throw_error (NOT_AVAILABLE_ERROR, |
| _("Register %d is not available"), regnum); |
| return value; |
| } |
| |
| enum register_status |
| regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf) |
| { |
| return regcache->cooked_read (regnum, buf); |
| } |
| |
| enum register_status |
| regcache::cooked_read (int regnum, gdb_byte *buf) |
| { |
| gdb_assert (regnum >= 0); |
| gdb_assert (regnum < m_descr->nr_cooked_registers); |
| if (regnum < m_descr->nr_raw_registers) |
| return raw_read (regnum, buf); |
| else if (m_readonly_p |
| && m_register_status[regnum] != REG_UNKNOWN) |
| { |
| /* Read-only register cache, perhaps the cooked value was |
| cached? */ |
| if (m_register_status[regnum] == REG_VALID) |
| memcpy (buf, register_buffer (regnum), |
| m_descr->sizeof_register[regnum]); |
| else |
| memset (buf, 0, m_descr->sizeof_register[regnum]); |
| |
| return (enum register_status) m_register_status[regnum]; |
| } |
| else if (gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
| { |
| struct value *mark, *computed; |
| enum register_status result = REG_VALID; |
| |
| mark = value_mark (); |
| |
| computed = gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
| this, regnum); |
| if (value_entirely_available (computed)) |
| memcpy (buf, value_contents_raw (computed), |
| m_descr->sizeof_register[regnum]); |
| else |
| { |
| memset (buf, 0, m_descr->sizeof_register[regnum]); |
| result = REG_UNAVAILABLE; |
| } |
| |
| value_free_to_mark (mark); |
| |
| return result; |
| } |
| else |
| return gdbarch_pseudo_register_read (m_descr->gdbarch, this, |
| regnum, buf); |
| } |
| |
| struct value * |
| regcache_cooked_read_value (struct regcache *regcache, int regnum) |
| { |
| return regcache->cooked_read_value (regnum); |
| } |
| |
| struct value * |
| regcache::cooked_read_value (int regnum) |
| { |
| gdb_assert (regnum >= 0); |
| gdb_assert (regnum < m_descr->nr_cooked_registers); |
| |
| if (regnum < m_descr->nr_raw_registers |
| || (m_readonly_p && m_register_status[regnum] != REG_UNKNOWN) |
| || !gdbarch_pseudo_register_read_value_p (m_descr->gdbarch)) |
| { |
| struct value *result; |
| |
| result = allocate_value (register_type (m_descr->gdbarch, regnum)); |
| VALUE_LVAL (result) = lval_register; |
| VALUE_REGNUM (result) = regnum; |
| |
| /* It is more efficient in general to do this delegation in this |
| direction than in the other one, even though the value-based |
| API is preferred. */ |
| if (cooked_read (regnum, |
| value_contents_raw (result)) == REG_UNAVAILABLE) |
| mark_value_bytes_unavailable (result, 0, |
| TYPE_LENGTH (value_type (result))); |
| |
| return result; |
| } |
| else |
| return gdbarch_pseudo_register_read_value (m_descr->gdbarch, |
| this, regnum); |
| } |
| |
| enum register_status |
| regcache_cooked_read_signed (struct regcache *regcache, int regnum, |
| LONGEST *val) |
| { |
| gdb_assert (regcache != NULL); |
| return regcache->cooked_read (regnum, val); |
| } |
| |
| template<typename T, typename> |
| enum register_status |
| regcache::cooked_read (int regnum, T *val) |
| { |
| enum register_status status; |
| gdb_byte *buf; |
| |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); |
| buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
| status = cooked_read (regnum, buf); |
| if (status == REG_VALID) |
| *val = extract_integer<T> (buf, m_descr->sizeof_register[regnum], |
| gdbarch_byte_order (m_descr->gdbarch)); |
| else |
| *val = 0; |
| return status; |
| } |
| |
| enum register_status |
| regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, |
| ULONGEST *val) |
| { |
| gdb_assert (regcache != NULL); |
| return regcache->cooked_read (regnum, val); |
| } |
| |
| void |
| regcache_cooked_write_signed (struct regcache *regcache, int regnum, |
| LONGEST val) |
| { |
| gdb_assert (regcache != NULL); |
| regcache->cooked_write (regnum, val); |
| } |
| |
| template<typename T, typename> |
| void |
| regcache::cooked_write (int regnum, T val) |
| { |
| gdb_byte *buf; |
| |
| gdb_assert (regnum >=0 && regnum < m_descr->nr_cooked_registers); |
| buf = (gdb_byte *) alloca (m_descr->sizeof_register[regnum]); |
| store_integer (buf, m_descr->sizeof_register[regnum], |
| gdbarch_byte_order (m_descr->gdbarch), val); |
| cooked_write (regnum, buf); |
| } |
| |
| void |
| regcache_cooked_write_unsigned (struct regcache *regcache, int regnum, |
| ULONGEST val) |
| { |
| gdb_assert (regcache != NULL); |
| regcache->cooked_write (regnum, val); |
| } |
| |
| /* See regcache.h. */ |
| |
| void |
| regcache_raw_set_cached_value (struct regcache *regcache, int regnum, |
| const gdb_byte *buf) |
| { |
| regcache->raw_set_cached_value (regnum, buf); |
| } |
| |
| void |
| regcache::raw_set_cached_value (int regnum, const gdb_byte *buf) |
| { |
| memcpy (register_buffer (regnum), buf, |
| m_descr->sizeof_register[regnum]); |
| m_register_status[regnum] = REG_VALID; |
| } |
| |
| void |
| regcache_raw_write (struct regcache *regcache, int regnum, |
| const gdb_byte *buf) |
| { |
| gdb_assert (regcache != NULL && buf != NULL); |
| regcache->raw_write (regnum, buf); |
| } |
| |
| void |
| regcache::raw_write (int regnum, const gdb_byte *buf) |
| { |
| struct cleanup *old_chain; |
| |
| gdb_assert (buf != NULL); |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers); |
| gdb_assert (!m_readonly_p); |
| |
| /* On the sparc, writing %g0 is a no-op, so we don't even want to |
| change the registers array if something writes to this register. */ |
| if (gdbarch_cannot_store_register (arch (), regnum)) |
| return; |
| |
| /* If we have a valid copy of the register, and new value == old |
| value, then don't bother doing the actual store. */ |
| if (get_register_status (regnum) == REG_VALID |
| && (memcmp (register_buffer (regnum), buf, |
| m_descr->sizeof_register[regnum]) == 0)) |
| return; |
| |
| target_prepare_to_store (this); |
| raw_set_cached_value (regnum, buf); |
| |
| /* Register a cleanup function for invalidating the register after it is |
| written, in case of a failure. */ |
| old_chain = make_cleanup_regcache_invalidate (this, regnum); |
| |
| target_store_registers (this, regnum); |
| |
| /* The target did not throw an error so we can discard invalidating the |
| register and restore the cleanup chain to what it was. */ |
| discard_cleanups (old_chain); |
| } |
| |
| void |
| regcache_cooked_write (struct regcache *regcache, int regnum, |
| const gdb_byte *buf) |
| { |
| regcache->cooked_write (regnum, buf); |
| } |
| |
| void |
| regcache::cooked_write (int regnum, const gdb_byte *buf) |
| { |
| gdb_assert (regnum >= 0); |
| gdb_assert (regnum < m_descr->nr_cooked_registers); |
| if (regnum < m_descr->nr_raw_registers) |
| raw_write (regnum, buf); |
| else |
| gdbarch_pseudo_register_write (m_descr->gdbarch, this, |
| regnum, buf); |
| } |
| |
| /* Perform a partial register transfer using a read, modify, write |
| operation. */ |
| |
| typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, |
| void *buf); |
| typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, |
| const void *buf); |
| |
| enum register_status |
| regcache::xfer_part (int regnum, int offset, int len, void *in, |
| const void *out, |
| enum register_status (*read) (struct regcache *regcache, |
| int regnum, |
| gdb_byte *buf), |
| void (*write) (struct regcache *regcache, int regnum, |
| const gdb_byte *buf)) |
| { |
| struct gdbarch *gdbarch = arch (); |
| gdb_byte *reg = (gdb_byte *) alloca (register_size (gdbarch, regnum)); |
| |
| gdb_assert (offset >= 0 && offset <= m_descr->sizeof_register[regnum]); |
| gdb_assert (len >= 0 && offset + len <= m_descr->sizeof_register[regnum]); |
| /* Something to do? */ |
| if (offset + len == 0) |
| return REG_VALID; |
| /* Read (when needed) ... */ |
| if (in != NULL |
| || offset > 0 |
| || offset + len < m_descr->sizeof_register[regnum]) |
| { |
| enum register_status status; |
| |
| gdb_assert (read != NULL); |
| status = read (this, regnum, reg); |
| if (status != REG_VALID) |
| return status; |
| } |
| /* ... modify ... */ |
| if (in != NULL) |
| memcpy (in, reg + offset, len); |
| if (out != NULL) |
| memcpy (reg + offset, out, len); |
| /* ... write (when needed). */ |
| if (out != NULL) |
| { |
| gdb_assert (write != NULL); |
| write (this, regnum, reg); |
| } |
| |
| return REG_VALID; |
| } |
| |
| enum register_status |
| regcache_raw_read_part (struct regcache *regcache, int regnum, |
| int offset, int len, gdb_byte *buf) |
| { |
| return regcache->raw_read_part (regnum, offset, len, buf); |
| } |
| |
| enum register_status |
| regcache::raw_read_part (int regnum, int offset, int len, gdb_byte *buf) |
| { |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers); |
| return xfer_part (regnum, offset, len, buf, NULL, |
| regcache_raw_read, regcache_raw_write); |
| } |
| |
| void |
| regcache_raw_write_part (struct regcache *regcache, int regnum, |
| int offset, int len, const gdb_byte *buf) |
| { |
| regcache->raw_write_part (regnum, offset, len, buf); |
| } |
| |
| void |
| regcache::raw_write_part (int regnum, int offset, int len, |
| const gdb_byte *buf) |
| { |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers); |
| xfer_part (regnum, offset, len, NULL, buf, regcache_raw_read, |
| regcache_raw_write); |
| } |
| |
| enum register_status |
| regcache_cooked_read_part (struct regcache *regcache, int regnum, |
| int offset, int len, gdb_byte *buf) |
| { |
| return regcache->cooked_read_part (regnum, offset, len, buf); |
| } |
| |
| |
| enum register_status |
| regcache::cooked_read_part (int regnum, int offset, int len, gdb_byte *buf) |
| { |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); |
| return xfer_part (regnum, offset, len, buf, NULL, |
| regcache_cooked_read, regcache_cooked_write); |
| } |
| |
| void |
| regcache_cooked_write_part (struct regcache *regcache, int regnum, |
| int offset, int len, const gdb_byte *buf) |
| { |
| regcache->cooked_write_part (regnum, offset, len, buf); |
| } |
| |
| void |
| regcache::cooked_write_part (int regnum, int offset, int len, |
| const gdb_byte *buf) |
| { |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers); |
| xfer_part (regnum, offset, len, NULL, buf, |
| regcache_cooked_read, regcache_cooked_write); |
| } |
| |
| /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */ |
| |
| void |
| regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf) |
| { |
| gdb_assert (regcache != NULL); |
| regcache->raw_supply (regnum, buf); |
| } |
| |
| void |
| regcache::raw_supply (int regnum, const void *buf) |
| { |
| void *regbuf; |
| size_t size; |
| |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers); |
| gdb_assert (!m_readonly_p); |
| |
| regbuf = register_buffer (regnum); |
| size = m_descr->sizeof_register[regnum]; |
| |
| if (buf) |
| { |
| memcpy (regbuf, buf, size); |
| m_register_status[regnum] = REG_VALID; |
| } |
| else |
| { |
| /* This memset not strictly necessary, but better than garbage |
| in case the register value manages to escape somewhere (due |
| to a bug, no less). */ |
| memset (regbuf, 0, size); |
| m_register_status[regnum] = REG_UNAVAILABLE; |
| } |
| } |
| |
| /* Supply register REGNUM to REGCACHE. Value to supply is an integer stored at |
| address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED. If |
| the register size is greater than ADDR_LEN, then the integer will be sign or |
| zero extended. If the register size is smaller than the integer, then the |
| most significant bytes of the integer will be truncated. */ |
| |
| void |
| regcache::raw_supply_integer (int regnum, const gdb_byte *addr, int addr_len, |
| bool is_signed) |
| { |
| enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); |
| gdb_byte *regbuf; |
| size_t regsize; |
| |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers); |
| gdb_assert (!m_readonly_p); |
| |
| regbuf = register_buffer (regnum); |
| regsize = m_descr->sizeof_register[regnum]; |
| |
| copy_integer_to_size (regbuf, regsize, addr, addr_len, is_signed, |
| byte_order); |
| m_register_status[regnum] = REG_VALID; |
| } |
| |
| /* Supply register REGNUM with zeroed value to REGCACHE. This is not the same |
| as calling raw_supply with NULL (which will set the state to |
| unavailable). */ |
| |
| void |
| regcache::raw_supply_zeroed (int regnum) |
| { |
| void *regbuf; |
| size_t size; |
| |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers); |
| gdb_assert (!m_readonly_p); |
| |
| regbuf = register_buffer (regnum); |
| size = m_descr->sizeof_register[regnum]; |
| |
| memset (regbuf, 0, size); |
| m_register_status[regnum] = REG_VALID; |
| } |
| |
| /* Collect register REGNUM from REGCACHE and store its contents in BUF. */ |
| |
| void |
| regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) |
| { |
| gdb_assert (regcache != NULL && buf != NULL); |
| regcache->raw_collect (regnum, buf); |
| } |
| |
| void |
| regcache::raw_collect (int regnum, void *buf) const |
| { |
| const void *regbuf; |
| size_t size; |
| |
| gdb_assert (buf != NULL); |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers); |
| |
| regbuf = register_buffer (regnum); |
| size = m_descr->sizeof_register[regnum]; |
| memcpy (buf, regbuf, size); |
| } |
| |
| /* Transfer a single or all registers belonging to a certain register |
| set to or from a buffer. This is the main worker function for |
| regcache_supply_regset and regcache_collect_regset. */ |
| |
| /* Collect register REGNUM from REGCACHE. Store collected value as an integer |
| at address ADDR, in target endian, with length ADDR_LEN and sign IS_SIGNED. |
| If ADDR_LEN is greater than the register size, then the integer will be sign |
| or zero extended. If ADDR_LEN is smaller than the register size, then the |
| most significant bytes of the integer will be truncated. */ |
| |
| void |
| regcache::raw_collect_integer (int regnum, gdb_byte *addr, int addr_len, |
| bool is_signed) const |
| { |
| enum bfd_endian byte_order = gdbarch_byte_order (m_descr->gdbarch); |
| const gdb_byte *regbuf; |
| size_t regsize; |
| |
| gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers); |
| |
| regbuf = register_buffer (regnum); |
| regsize = m_descr->sizeof_register[regnum]; |
| |
| copy_integer_to_size (addr, addr_len, regbuf, regsize, is_signed, |
| byte_order); |
| } |
| |
| void |
| regcache::transfer_regset (const struct regset *regset, |
| struct regcache *out_regcache, |
| int regnum, const void *in_buf, |
| void *out_buf, size_t size) const |
| { |
| const struct regcache_map_entry *map; |
| int offs = 0, count; |
| |
| for (map = (const struct regcache_map_entry *) regset->regmap; |
| (count = map->count) != 0; |
| map++) |
| { |
| int regno = map->regno; |
| int slot_size = map->size; |
| |
| if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) |
| slot_size = m_descr->sizeof_register[regno]; |
| |
| if (regno == REGCACHE_MAP_SKIP |
| || (regnum != -1 |
| && (regnum < regno || regnum >= regno + count))) |
| offs += count * slot_size; |
| |
| else if (regnum == -1) |
| for (; count--; regno++, offs += slot_size) |
| { |
| if (offs + slot_size > size) |
| break; |
| |
| if (out_buf) |
| raw_collect (regno, (gdb_byte *) out_buf + offs); |
| else |
| out_regcache->raw_supply (regno, in_buf |
| ? (const gdb_byte *) in_buf + offs |
| : NULL); |
| } |
| else |
| { |
| /* Transfer a single register and return. */ |
| offs += (regnum - regno) * slot_size; |
| if (offs + slot_size > size) |
| return; |
| |
| if (out_buf) |
| raw_collect (regnum, (gdb_byte *) out_buf + offs); |
| else |
| out_regcache->raw_supply (regnum, in_buf |
| ? (const gdb_byte *) in_buf + offs |
| : NULL); |
| return; |
| } |
| } |
| } |
| |
| /* Supply register REGNUM from BUF to REGCACHE, using the register map |
| in REGSET. If REGNUM is -1, do this for all registers in REGSET. |
| If BUF is NULL, set the register(s) to "unavailable" status. */ |
| |
| void |
| regcache_supply_regset (const struct regset *regset, |
| struct regcache *regcache, |
| int regnum, const void *buf, size_t size) |
| { |
| regcache->supply_regset (regset, regnum, buf, size); |
| } |
| |
| void |
| regcache::supply_regset (const struct regset *regset, |
| int regnum, const void *buf, size_t size) |
| { |
| transfer_regset (regset, this, regnum, buf, NULL, size); |
| } |
| |
| /* Collect register REGNUM from REGCACHE to BUF, using the register |
| map in REGSET. If REGNUM is -1, do this for all registers in |
| REGSET. */ |
| |
| void |
| regcache_collect_regset (const struct regset *regset, |
| const struct regcache *regcache, |
| int regnum, void *buf, size_t size) |
| { |
| regcache->collect_regset (regset, regnum, buf, size); |
| } |
| |
| void |
| regcache::collect_regset (const struct regset *regset, |
| int regnum, void *buf, size_t size) const |
| { |
| transfer_regset (regset, NULL, regnum, NULL, buf, size); |
| } |
| |
| |
| /* Special handling for register PC. */ |
| |
| CORE_ADDR |
| regcache_read_pc (struct regcache *regcache) |
| { |
| struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| |
| CORE_ADDR pc_val; |
| |
| if (gdbarch_read_pc_p (gdbarch)) |
| pc_val = gdbarch_read_pc (gdbarch, regcache); |
| /* Else use per-frame method on get_current_frame. */ |
| else if (gdbarch_pc_regnum (gdbarch) >= 0) |
| { |
| ULONGEST raw_val; |
| |
| if (regcache_cooked_read_unsigned (regcache, |
| gdbarch_pc_regnum (gdbarch), |
| &raw_val) == REG_UNAVAILABLE) |
| throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available")); |
| |
| pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val); |
| } |
| else |
| internal_error (__FILE__, __LINE__, |
| _("regcache_read_pc: Unable to find PC")); |
| return pc_val; |
| } |
| |
| void |
| regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) |
| { |
| struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| |
| if (gdbarch_write_pc_p (gdbarch)) |
| gdbarch_write_pc (gdbarch, regcache, pc); |
| else if (gdbarch_pc_regnum (gdbarch) >= 0) |
| regcache_cooked_write_unsigned (regcache, |
| gdbarch_pc_regnum (gdbarch), pc); |
| else |
| internal_error (__FILE__, __LINE__, |
| _("regcache_write_pc: Unable to update PC")); |
| |
| /* Writing the PC (for instance, from "load") invalidates the |
| current frame. */ |
| reinit_frame_cache (); |
| } |
| |
| void |
| regcache::debug_print_register (const char *func, int regno) |
| { |
| struct gdbarch *gdbarch = arch (); |
| |
| fprintf_unfiltered (gdb_stdlog, "%s ", func); |
| if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) |
| && gdbarch_register_name (gdbarch, regno) != NULL |
| && gdbarch_register_name (gdbarch, regno)[0] != '\0') |
| fprintf_unfiltered (gdb_stdlog, "(%s)", |
| gdbarch_register_name (gdbarch, regno)); |
| else |
| fprintf_unfiltered (gdb_stdlog, "(%d)", regno); |
| if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) |
| { |
| enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| int size = register_size (gdbarch, regno); |
| gdb_byte *buf = register_buffer (regno); |
| |
| fprintf_unfiltered (gdb_stdlog, " = "); |
| for (int i = 0; i < size; i++) |
| { |
| fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); |
| } |
| if (size <= sizeof (LONGEST)) |
| { |
| ULONGEST val = extract_unsigned_integer (buf, size, byte_order); |
| |
| fprintf_unfiltered (gdb_stdlog, " %s %s", |
| core_addr_to_string_nz (val), plongest (val)); |
| } |
| } |
| fprintf_unfiltered (gdb_stdlog, "\n"); |
| } |
| |
| static void |
| reg_flush_command (char *command, int from_tty) |
| { |
| /* Force-flush the register cache. */ |
| registers_changed (); |
| if (from_tty) |
| printf_filtered (_("Register cache flushed.\n")); |
| } |
| |
| void |
| regcache::dump (ui_file *file, enum regcache_dump_what what_to_dump) |
| { |
| struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
| struct gdbarch *gdbarch = m_descr->gdbarch; |
| int regnum; |
| int footnote_nr = 0; |
| int footnote_register_size = 0; |
| int footnote_register_offset = 0; |
| int footnote_register_type_name_null = 0; |
| long register_offset = 0; |
| |
| #if 0 |
| fprintf_unfiltered (file, "nr_raw_registers %d\n", |
| m_descr->nr_raw_registers); |
| fprintf_unfiltered (file, "nr_cooked_registers %d\n", |
| m_descr->nr_cooked_registers); |
| fprintf_unfiltered (file, "sizeof_raw_registers %ld\n", |
| m_descr->sizeof_raw_registers); |
| fprintf_unfiltered (file, "sizeof_raw_register_status %ld\n", |
| m_descr->sizeof_raw_register_status); |
| fprintf_unfiltered (file, "gdbarch_num_regs %d\n", |
| gdbarch_num_regs (gdbarch)); |
| fprintf_unfiltered (file, "gdbarch_num_pseudo_regs %d\n", |
| gdbarch_num_pseudo_regs (gdbarch)); |
| #endif |
| |
| gdb_assert (m_descr->nr_cooked_registers |
| == (gdbarch_num_regs (gdbarch) |
| + gdbarch_num_pseudo_regs (gdbarch))); |
| |
| for (regnum = -1; regnum < m_descr->nr_cooked_registers; regnum++) |
| { |
| /* Name. */ |
| if (regnum < 0) |
| fprintf_unfiltered (file, " %-10s", "Name"); |
| else |
| { |
| const char *p = gdbarch_register_name (gdbarch, regnum); |
| |
| if (p == NULL) |
| p = ""; |
| else if (p[0] == '\0') |
| p = "''"; |
| fprintf_unfiltered (file, " %-10s", p); |
| } |
| |
| /* Number. */ |
| if (regnum < 0) |
| fprintf_unfiltered (file, " %4s", "Nr"); |
| else |
| fprintf_unfiltered (file, " %4d", regnum); |
| |
| /* Relative number. */ |
| if (regnum < 0) |
| fprintf_unfiltered (file, " %4s", "Rel"); |
| else if (regnum < gdbarch_num_regs (gdbarch)) |
| fprintf_unfiltered (file, " %4d", regnum); |
| else |
| fprintf_unfiltered (file, " %4d", |
| (regnum - gdbarch_num_regs (gdbarch))); |
| |
| /* Offset. */ |
| if (regnum < 0) |
| fprintf_unfiltered (file, " %6s ", "Offset"); |
| else |
| { |
| fprintf_unfiltered (file, " %6ld", |
| m_descr->register_offset[regnum]); |
| if (register_offset != m_descr->register_offset[regnum] |
| || (regnum > 0 |
| && (m_descr->register_offset[regnum] |
| != (m_descr->register_offset[regnum - 1] |
| + m_descr->sizeof_register[regnum - 1]))) |
| ) |
| { |
| if (!footnote_register_offset) |
| footnote_register_offset = ++footnote_nr; |
| fprintf_unfiltered (file, "*%d", footnote_register_offset); |
| } |
| else |
| fprintf_unfiltered (file, " "); |
| register_offset = (m_descr->register_offset[regnum] |
| + m_descr->sizeof_register[regnum]); |
| } |
| |
| /* Size. */ |
| if (regnum < 0) |
| fprintf_unfiltered (file, " %5s ", "Size"); |
| else |
| fprintf_unfiltered (file, " %5ld", m_descr->sizeof_register[regnum]); |
| |
| /* Type. */ |
| { |
| const char *t; |
| |
| if (regnum < 0) |
| t = "Type"; |
| else |
| { |
| static const char blt[] = "builtin_type"; |
| |
| t = TYPE_NAME (register_type (arch (), regnum)); |
| if (t == NULL) |
| { |
| char *n; |
| |
| if (!footnote_register_type_name_null) |
| footnote_register_type_name_null = ++footnote_nr; |
| n = xstrprintf ("*%d", footnote_register_type_name_null); |
| make_cleanup (xfree, n); |
| t = n; |
| } |
| /* Chop a leading builtin_type. */ |
| if (startswith (t, blt)) |
| t += strlen (blt); |
| } |
| fprintf_unfiltered (file, " %-15s", t); |
| } |
| |
| /* Leading space always present. */ |
| fprintf_unfiltered (file, " "); |
| |
| /* Value, raw. */ |
| if (what_to_dump == regcache_dump_raw) |
| { |
| if (regnum < 0) |
| fprintf_unfiltered (file, "Raw value"); |
| else if (regnum >= m_descr->nr_raw_registers) |
| fprintf_unfiltered (file, "<cooked>"); |
| else if (get_register_status (regnum) == REG_UNKNOWN) |
| fprintf_unfiltered (file, "<invalid>"); |
| else if (get_register_status (regnum) == REG_UNAVAILABLE) |
| fprintf_unfiltered (file, "<unavailable>"); |
| else |
| { |
| raw_update (regnum); |
| print_hex_chars (file, register_buffer (regnum), |
| m_descr->sizeof_register[regnum], |
| gdbarch_byte_order (gdbarch), true); |
| } |
| } |
| |
| /* Value, cooked. */ |
| if (what_to_dump == regcache_dump_cooked) |
| { |
| if (regnum < 0) |
| fprintf_unfiltered (file, "Cooked value"); |
| else |
| { |
| const gdb_byte *buf = NULL; |
| enum register_status status; |
| struct value *value = NULL; |
| |
| if (regnum < m_descr->nr_raw_registers) |
| { |
| raw_update (regnum); |
| status = get_register_status (regnum); |
| buf = register_buffer (regnum); |
| } |
| else |
| { |
| value = cooked_read_value (regnum); |
| |
| if (!value_optimized_out (value) |
| && value_entirely_available (value)) |
| { |
| status = REG_VALID; |
| buf = value_contents_all (value); |
| } |
| else |
| status = REG_UNAVAILABLE; |
| } |
| |
| if (status == REG_UNKNOWN) |
| fprintf_unfiltered (file, "<invalid>"); |
| else if (status == REG_UNAVAILABLE) |
| fprintf_unfiltered (file, "<unavailable>"); |
| else |
| print_hex_chars (file, buf, |
| m_descr->sizeof_register[regnum], |
| gdbarch_byte_order (gdbarch), true); |
| |
| if (value != NULL) |
| { |
| release_value (value); |
| value_free (value); |
| } |
| } |
| } |
| |
| /* Group members. */ |
| if (what_to_dump == regcache_dump_groups) |
| { |
| if (regnum < 0) |
| fprintf_unfiltered (file, "Groups"); |
| else |
| { |
| const char *sep = ""; |
| struct reggroup *group; |
| |
| for (group = reggroup_next (gdbarch, NULL); |
| group != NULL; |
| group = reggroup_next (gdbarch, group)) |
| { |
| if (gdbarch_register_reggroup_p (gdbarch, regnum, group)) |
| { |
| fprintf_unfiltered (file, |
| "%s%s", sep, reggroup_name (group)); |
| sep = ","; |
| } |
| } |
| } |
| } |
| |
| /* Remote packet configuration. */ |
| if (what_to_dump == regcache_dump_remote) |
| { |
| if (regnum < 0) |
| { |
| fprintf_unfiltered (file, "Rmt Nr g/G Offset"); |
| } |
| else if (regnum < m_descr->nr_raw_registers) |
| { |
| int pnum, poffset; |
| |
| if (remote_register_number_and_offset (arch (), regnum, |
| &pnum, &poffset)) |
| fprintf_unfiltered (file, "%7d %11d", pnum, poffset); |
| } |
| } |
| |
| fprintf_unfiltered (file, "\n"); |
| } |
| |
| if (footnote_register_size) |
| fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n", |
| footnote_register_size); |
| if (footnote_register_offset) |
| fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n", |
| footnote_register_offset); |
| if (footnote_register_type_name_null) |
| fprintf_unfiltered (file, |
| "*%d: Register type's name NULL.\n", |
| footnote_register_type_name_null); |
| do_cleanups (cleanups); |
| } |
| |
| static void |
| regcache_print (char *args, enum regcache_dump_what what_to_dump) |
| { |
| if (args == NULL) |
| get_current_regcache ()->dump (gdb_stdout, what_to_dump); |
| else |
| { |
| stdio_file file; |
| |
| if (!file.open (args, "w")) |
| perror_with_name (_("maintenance print architecture")); |
| get_current_regcache ()->dump (&file, what_to_dump); |
| } |
| } |
| |
| static void |
| maintenance_print_registers (char *args, int from_tty) |
| { |
| regcache_print (args, regcache_dump_none); |
| } |
| |
| static void |
| maintenance_print_raw_registers (char *args, int from_tty) |
| { |
| regcache_print (args, regcache_dump_raw); |
| } |
| |
| static void |
| maintenance_print_cooked_registers (char *args, int from_tty) |
| { |
| regcache_print (args, regcache_dump_cooked); |
| } |
| |
| static void |
| maintenance_print_register_groups (char *args, int from_tty) |
| { |
| regcache_print (args, regcache_dump_groups); |
| } |
| |
| static void |
| maintenance_print_remote_registers (char *args, int from_tty) |
| { |
| regcache_print (args, regcache_dump_remote); |
| } |
| |
| #if GDB_SELF_TEST |
| #include "selftest.h" |
| |
| namespace selftests { |
| |
| class regcache_access : public regcache |
| { |
| public: |
| |
| /* Return the number of elements in current_regcache. */ |
| |
| static size_t |
| current_regcache_size () |
| { |
| return std::distance (regcache::current_regcache.begin (), |
| regcache::current_regcache.end ()); |
| } |
| }; |
| |
| static void |
| current_regcache_test (void) |
| { |
| /* It is empty at the start. */ |
| SELF_CHECK (regcache_access::current_regcache_size () == 0); |
| |
| ptid_t ptid1 (1), ptid2 (2), ptid3 (3); |
| |
| /* Get regcache from ptid1, a new regcache is added to |
| current_regcache. */ |
| regcache *regcache = get_thread_arch_aspace_regcache (ptid1, |
| target_gdbarch (), |
| NULL); |
| |
| SELF_CHECK (regcache != NULL); |
| SELF_CHECK (regcache->ptid () == ptid1); |
| SELF_CHECK (regcache_access::current_regcache_size () == 1); |
| |
| /* Get regcache from ptid2, a new regcache is added to |
| current_regcache. */ |
| regcache = get_thread_arch_aspace_regcache (ptid2, |
| target_gdbarch (), |
| NULL); |
| SELF_CHECK (regcache != NULL); |
| SELF_CHECK (regcache->ptid () == ptid2); |
| SELF_CHECK (regcache_access::current_regcache_size () == 2); |
| |
| /* Get regcache from ptid3, a new regcache is added to |
| current_regcache. */ |
| regcache = get_thread_arch_aspace_regcache (ptid3, |
| target_gdbarch (), |
| NULL); |
| SELF_CHECK (regcache != NULL); |
| SELF_CHECK (regcache->ptid () == ptid3); |
| SELF_CHECK (regcache_access::current_regcache_size () == 3); |
| |
| /* Get regcache from ptid2 again, nothing is added to |
| current_regcache. */ |
| regcache = get_thread_arch_aspace_regcache (ptid2, |
| target_gdbarch (), |
| NULL); |
| SELF_CHECK (regcache != NULL); |
| SELF_CHECK (regcache->ptid () == ptid2); |
| SELF_CHECK (regcache_access::current_regcache_size () == 3); |
| |
| /* Mark ptid2 is changed, so regcache of ptid2 should be removed from |
| current_regcache. */ |
| registers_changed_ptid (ptid2); |
| SELF_CHECK (regcache_access::current_regcache_size () == 2); |
| } |
| |
| } // namespace selftests |
| #endif /* GDB_SELF_TEST */ |
| |
| extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */ |
| |
| void |
| _initialize_regcache (void) |
| { |
| regcache_descr_handle |
| = gdbarch_data_register_post_init (init_regcache_descr); |
| |
| observer_attach_target_changed (regcache_observer_target_changed); |
| observer_attach_thread_ptid_changed (regcache::regcache_thread_ptid_changed); |
| |
| add_com ("flushregs", class_maintenance, reg_flush_command, |
| _("Force gdb to flush its register cache (maintainer command)")); |
| |
| add_cmd ("registers", class_maintenance, maintenance_print_registers, |
| _("Print the internal register configuration.\n" |
| "Takes an optional file parameter."), &maintenanceprintlist); |
| add_cmd ("raw-registers", class_maintenance, |
| maintenance_print_raw_registers, |
| _("Print the internal register configuration " |
| "including raw values.\n" |
| "Takes an optional file parameter."), &maintenanceprintlist); |
| add_cmd ("cooked-registers", class_maintenance, |
| maintenance_print_cooked_registers, |
| _("Print the internal register configuration " |
| "including cooked values.\n" |
| "Takes an optional file parameter."), &maintenanceprintlist); |
| add_cmd ("register-groups", class_maintenance, |
| maintenance_print_register_groups, |
| _("Print the internal register configuration " |
| "including each register's group.\n" |
| "Takes an optional file parameter."), |
| &maintenanceprintlist); |
| add_cmd ("remote-registers", class_maintenance, |
| maintenance_print_remote_registers, _("\ |
| Print the internal register configuration including each register's\n\ |
| remote register number and buffer offset in the g/G packets.\n\ |
| Takes an optional file parameter."), |
| &maintenanceprintlist); |
| #if GDB_SELF_TEST |
| register_self_test (selftests::current_regcache_test); |
| #endif |
| } |