4c74fe6b84
gdb: 2018-02-21 Yao Qi <yao.qi@linaro.org> * Makefile.in (COMMON_SFILES): Add regcache-dump.c * regcache-dump.c: New file. * regcache.c: Move register_dump to regcache-dump.c. (maintenance_print_registers): Likewise. (maintenance_print_raw_registers): Likewise. (maintenance_print_cooked_registers): Likewise. (maintenance_print_register_groups): Likewise. (maintenance_print_remote_registers): Likewise. (_initialize_regcache): Likewise. * regcache.h (register_dump): Moved from regcache.c.
451 lines
13 KiB
C++
451 lines
13 KiB
C++
/* Cache and manage the values of registers for GDB, the GNU debugger.
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Copyright (C) 1986-2018 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef REGCACHE_H
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#define REGCACHE_H
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#include "common-regcache.h"
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#include <forward_list>
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struct regcache;
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struct regset;
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struct gdbarch;
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struct address_space;
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extern struct regcache *get_current_regcache (void);
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extern struct regcache *get_thread_regcache (ptid_t ptid);
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extern struct regcache *get_thread_arch_regcache (ptid_t, struct gdbarch *);
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extern struct regcache *get_thread_arch_aspace_regcache (ptid_t,
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struct gdbarch *,
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struct address_space *);
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/* Return REGCACHE's ptid. */
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extern ptid_t regcache_get_ptid (const struct regcache *regcache);
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enum register_status regcache_register_status (const struct regcache *regcache,
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int regnum);
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/* Make certain that the register REGNUM in REGCACHE is up-to-date. */
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void regcache_raw_update (struct regcache *regcache, int regnum);
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/* Transfer a raw register [0..NUM_REGS) between core-gdb and the
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regcache. The read variants return the status of the register. */
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enum register_status regcache_raw_read (struct regcache *regcache,
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int rawnum, gdb_byte *buf);
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void regcache_raw_write (struct regcache *regcache, int rawnum,
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const gdb_byte *buf);
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extern enum register_status
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regcache_raw_read_signed (struct regcache *regcache,
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int regnum, LONGEST *val);
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extern void regcache_raw_write_signed (struct regcache *regcache,
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int regnum, LONGEST val);
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extern void regcache_raw_write_unsigned (struct regcache *regcache,
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int regnum, ULONGEST val);
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/* Return the register's value in signed or throw if it's not
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available. */
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extern LONGEST regcache_raw_get_signed (struct regcache *regcache,
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int regnum);
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/* Partial transfer of raw registers. These perform read, modify,
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write style operations. The read variant returns the status of the
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register. */
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extern enum register_status
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regcache_raw_read_part (struct regcache *regcache, int regnum,
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int offset, int len, gdb_byte *buf);
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void regcache_raw_write_part (struct regcache *regcache, int regnum,
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int offset, int len, const gdb_byte *buf);
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void regcache_invalidate (struct regcache *regcache, int regnum);
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/* Transfer of pseudo-registers. The read variants return a register
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status, as an indication of when a ``cooked'' register was
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constructed from valid, invalid or unavailable ``raw''
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registers. */
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/* Transfer a cooked register [0..NUM_REGS+NUM_PSEUDO_REGS). */
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enum register_status regcache_cooked_read (struct regcache *regcache,
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int rawnum, gdb_byte *buf);
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void regcache_cooked_write (struct regcache *regcache, int rawnum,
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const gdb_byte *buf);
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/* Read register REGNUM from REGCACHE and return a new value. This
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will call mark_value_bytes_unavailable as appropriate. */
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struct value *regcache_cooked_read_value (struct regcache *regcache,
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int regnum);
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/* Read a register as a signed/unsigned quantity. */
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extern enum register_status
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regcache_cooked_read_signed (struct regcache *regcache,
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int regnum, LONGEST *val);
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extern enum register_status
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regcache_cooked_read_unsigned (struct regcache *regcache,
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int regnum, ULONGEST *val);
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extern void regcache_cooked_write_signed (struct regcache *regcache,
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int regnum, LONGEST val);
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extern void regcache_cooked_write_unsigned (struct regcache *regcache,
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int regnum, ULONGEST val);
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/* Partial transfer of a cooked register. These perform read, modify,
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write style operations. */
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enum register_status regcache_cooked_read_part (struct regcache *regcache,
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int regnum, int offset,
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int len, gdb_byte *buf);
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void regcache_cooked_write_part (struct regcache *regcache, int regnum,
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int offset, int len, const gdb_byte *buf);
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/* Special routines to read/write the PC. */
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/* For regcache_read_pc see common/common-regcache.h. */
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extern void regcache_write_pc (struct regcache *regcache, CORE_ADDR pc);
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/* Transfer a raw register [0..NUM_REGS) between the regcache and the
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target. These functions are called by the target in response to a
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target_fetch_registers() or target_store_registers(). */
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extern void regcache_raw_supply (struct regcache *regcache,
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int regnum, const void *buf);
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extern void regcache_raw_collect (const struct regcache *regcache,
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int regnum, void *buf);
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/* Mapping between register numbers and offsets in a buffer, for use
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in the '*regset' functions below. In an array of
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'regcache_map_entry' each element is interpreted like follows:
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- If 'regno' is a register number: Map register 'regno' to the
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current offset (starting with 0) and increase the current offset
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by 'size' (or the register's size, if 'size' is zero). Repeat
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this with consecutive register numbers up to 'regno+count-1'.
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- If 'regno' is REGCACHE_MAP_SKIP: Add 'count*size' to the current
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offset.
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- If count=0: End of the map. */
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struct regcache_map_entry
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{
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int count;
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int regno;
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int size;
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};
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/* Special value for the 'regno' field in the struct above. */
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enum
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{
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REGCACHE_MAP_SKIP = -1,
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};
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/* Transfer a set of registers (as described by REGSET) between
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REGCACHE and BUF. If REGNUM == -1, transfer all registers
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belonging to the regset, otherwise just the register numbered
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REGNUM. The REGSET's 'regmap' field must point to an array of
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'struct regcache_map_entry'.
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These functions are suitable for the 'regset_supply' and
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'regset_collect' fields in a regset structure. */
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extern void regcache_supply_regset (const struct regset *regset,
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struct regcache *regcache,
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int regnum, const void *buf,
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size_t size);
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extern void regcache_collect_regset (const struct regset *regset,
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const struct regcache *regcache,
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int regnum, void *buf, size_t size);
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/* The type of a register. This function is slightly more efficient
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then its gdbarch vector counterpart since it returns a precomputed
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value stored in a table. */
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extern struct type *register_type (struct gdbarch *gdbarch, int regnum);
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/* Return the size of register REGNUM. All registers should have only
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one size. */
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extern int register_size (struct gdbarch *gdbarch, int regnum);
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typedef enum register_status (regcache_cooked_read_ftype) (void *src,
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int regnum,
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gdb_byte *buf);
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/* A (register_number, register_value) pair. */
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typedef struct cached_reg
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{
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int num;
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gdb_byte *data;
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} cached_reg_t;
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/* Buffer of registers. */
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class reg_buffer
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{
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public:
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reg_buffer (gdbarch *gdbarch, bool has_pseudo);
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DISABLE_COPY_AND_ASSIGN (reg_buffer);
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/* Return regcache's architecture. */
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gdbarch *arch () const;
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enum register_status get_register_status (int regnum) const;
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virtual ~reg_buffer ()
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{
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xfree (m_registers);
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xfree (m_register_status);
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}
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protected:
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/* Assert on the range of REGNUM. */
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void assert_regnum (int regnum) const;
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int num_raw_registers () const;
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gdb_byte *register_buffer (int regnum) const;
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/* Save a register cache. The set of registers saved into the
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regcache determined by the save_reggroup. COOKED_READ returns
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zero iff the register's value can't be returned. */
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void save (regcache_cooked_read_ftype *cooked_read, void *src);
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struct regcache_descr *m_descr;
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bool m_has_pseudo;
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/* The register buffers. */
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gdb_byte *m_registers;
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/* Register cache status. */
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signed char *m_register_status;
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friend class regcache;
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friend class detached_regcache;
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};
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/* An abstract class which only has methods doing read. */
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class readable_regcache : public reg_buffer
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{
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public:
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readable_regcache (gdbarch *gdbarch, bool has_pseudo)
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: reg_buffer (gdbarch, has_pseudo)
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{}
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enum register_status raw_read (int regnum, gdb_byte *buf);
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template<typename T, typename = RequireLongest<T>>
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enum register_status raw_read (int regnum, T *val);
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enum register_status raw_read_part (int regnum, int offset, int len,
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gdb_byte *buf);
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virtual void raw_update (int regnum) = 0;
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enum register_status cooked_read (int regnum, gdb_byte *buf);
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template<typename T, typename = RequireLongest<T>>
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enum register_status cooked_read (int regnum, T *val);
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enum register_status cooked_read_part (int regnum, int offset, int len,
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gdb_byte *buf);
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struct value *cooked_read_value (int regnum);
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protected:
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enum register_status read_part (int regnum, int offset, int len, void *in,
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bool is_raw);
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};
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/* Buffer of registers, can be read and written. */
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class detached_regcache : public readable_regcache
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{
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public:
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detached_regcache (gdbarch *gdbarch, bool has_pseudo)
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: readable_regcache (gdbarch, has_pseudo)
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{}
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void raw_supply (int regnum, const void *buf);
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void raw_supply (int regnum, const reg_buffer &src)
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{
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raw_supply (regnum, src.register_buffer (regnum));
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}
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void raw_update (int regnum) override
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{}
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void raw_supply_integer (int regnum, const gdb_byte *addr, int addr_len,
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bool is_signed);
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void raw_supply_zeroed (int regnum);
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void invalidate (int regnum);
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DISABLE_COPY_AND_ASSIGN (detached_regcache);
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};
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class readonly_detached_regcache;
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/* The register cache for storing raw register values. */
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class regcache : public detached_regcache
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{
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public:
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DISABLE_COPY_AND_ASSIGN (regcache);
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/* Return REGCACHE's address space. */
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const address_space *aspace () const
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{
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return m_aspace;
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}
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/* Restore 'this' regcache. The set of registers restored into
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the regcache determined by the restore_reggroup.
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Writes to regcache will go through to the target. SRC is a
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read-only register cache. */
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void restore (readonly_detached_regcache *src);
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void cooked_write (int regnum, const gdb_byte *buf);
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void raw_write (int regnum, const gdb_byte *buf);
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template<typename T, typename = RequireLongest<T>>
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void raw_write (int regnum, T val);
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template<typename T, typename = RequireLongest<T>>
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void cooked_write (int regnum, T val);
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void raw_update (int regnum) override;
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void raw_collect (int regnum, void *buf) const;
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void raw_collect_integer (int regnum, gdb_byte *addr, int addr_len,
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bool is_signed) const;
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void raw_write_part (int regnum, int offset, int len, const gdb_byte *buf);
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void cooked_write_part (int regnum, int offset, int len,
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const gdb_byte *buf);
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void supply_regset (const struct regset *regset,
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int regnum, const void *buf, size_t size);
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void collect_regset (const struct regset *regset, int regnum,
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void *buf, size_t size) const;
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ptid_t ptid () const
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{
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return m_ptid;
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}
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void set_ptid (const ptid_t ptid)
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{
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this->m_ptid = ptid;
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}
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/* Dump the contents of a register from the register cache to the target
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debug. */
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void debug_print_register (const char *func, int regno);
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static void regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid);
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protected:
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regcache (gdbarch *gdbarch, const address_space *aspace_);
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static std::forward_list<regcache *> current_regcache;
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private:
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void transfer_regset (const struct regset *regset,
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struct regcache *out_regcache,
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int regnum, const void *in_buf,
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void *out_buf, size_t size) const;
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enum register_status write_part (int regnum, int offset, int len,
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const void *out, bool is_raw);
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/* The address space of this register cache (for registers where it
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makes sense, like PC or SP). */
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const address_space * const m_aspace;
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/* If this is a read-write cache, which thread's registers is
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it connected to? */
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ptid_t m_ptid;
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friend struct regcache *
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get_thread_arch_aspace_regcache (ptid_t ptid, struct gdbarch *gdbarch,
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struct address_space *aspace);
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friend void
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registers_changed_ptid (ptid_t ptid);
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};
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class readonly_detached_regcache : public readable_regcache
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{
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public:
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readonly_detached_regcache (const regcache &src);
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/* Create a readonly regcache by getting contents from COOKED_READ. */
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readonly_detached_regcache (gdbarch *gdbarch,
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regcache_cooked_read_ftype *cooked_read,
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void *src)
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: readable_regcache (gdbarch, true)
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{
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save (cooked_read, src);
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}
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DISABLE_COPY_AND_ASSIGN (readonly_detached_regcache);
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void raw_update (int regnum) override
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{}
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};
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extern void registers_changed (void);
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extern void registers_changed_ptid (ptid_t);
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/* An abstract base class for register dump. */
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class register_dump
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{
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public:
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void dump (ui_file *file);
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virtual ~register_dump () = default;
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protected:
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register_dump (gdbarch *arch)
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: m_gdbarch (arch)
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{}
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/* Dump the register REGNUM contents. If REGNUM is -1, print the
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header. */
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virtual void dump_reg (ui_file *file, int regnum) = 0;
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gdbarch *m_gdbarch;
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};
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#endif /* REGCACHE_H */
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