/* Cache and manage the values of registers for GDB, the GNU debugger.
- Copyright (C) 1986-2017 Free Software Foundation, Inc.
+ Copyright (C) 1986-2018 Free Software Foundation, Inc.
This file is part of GDB.
struct gdbarch *,
struct address_space *);
-void regcache_xfree (struct regcache *regcache);
-struct cleanup *make_cleanup_regcache_xfree (struct regcache *regcache);
-struct regcache *regcache_xmalloc (struct gdbarch *gdbarch,
- struct address_space *aspace);
-
/* Return REGCACHE's ptid. */
extern ptid_t regcache_get_ptid (const struct regcache *regcache);
-/* Return REGCACHE's architecture. */
-
-extern struct gdbarch *get_regcache_arch (const struct regcache *regcache);
-
-/* Return REGCACHE's address space. */
-
-extern struct address_space *get_regcache_aspace (const struct regcache *);
-
enum register_status regcache_register_status (const struct regcache *regcache,
int regnum);
extern LONGEST regcache_raw_get_signed (struct regcache *regcache,
int regnum);
-/* Set a raw register's value in the regcache's buffer. Unlike
- regcache_raw_write, this is not write-through. The intention is
- allowing to change the buffer contents of a read-only regcache
- allocated with regcache_xmalloc. */
-
-extern void regcache_raw_set_cached_value
- (struct regcache *regcache, int regnum, const gdb_byte *buf);
-
/* Partial transfer of raw registers. These perform read, modify,
write style operations. The read variant returns the status of the
register. */
extern int register_size (struct gdbarch *gdbarch, int regnum);
-
-/* Save/restore a register cache. The set of registers saved /
- restored into the DST regcache determined by the save_reggroup /
- restore_reggroup respectively. COOKED_READ returns zero iff the
- register's value can't be returned. */
-
typedef enum register_status (regcache_cooked_read_ftype) (void *src,
int regnum,
gdb_byte *buf);
-extern void regcache_save (struct regcache *dst,
- regcache_cooked_read_ftype *cooked_read,
- void *cooked_read_context);
+/* A (register_number, register_value) pair. */
-enum regcache_dump_what
+typedef struct cached_reg
{
- regcache_dump_none, regcache_dump_raw,
- regcache_dump_cooked, regcache_dump_groups,
- regcache_dump_remote
-};
+ int num;
+ gdb_byte *data;
+} cached_reg_t;
-/* The register cache for storing raw register values. */
+/* Buffer of registers. */
-class regcache
+class reg_buffer
{
public:
- regcache (gdbarch *gdbarch, address_space *aspace_)
- : regcache (gdbarch, aspace_, true)
- {}
+ reg_buffer (gdbarch *gdbarch, bool has_pseudo);
- struct readonly_t {};
- static constexpr readonly_t readonly {};
+ DISABLE_COPY_AND_ASSIGN (reg_buffer);
- /* Create a readonly regcache from a non-readonly regcache. */
- regcache (readonly_t, const regcache &src);
+ /* Return regcache's architecture. */
+ gdbarch *arch () const;
- regcache (const regcache &) = delete;
- void operator= (const regcache &) = delete;
+ enum register_status get_register_status (int regnum) const;
- ~regcache ()
+ virtual ~reg_buffer ()
{
xfree (m_registers);
xfree (m_register_status);
}
+protected:
+ /* Assert on the range of REGNUM. */
+ void assert_regnum (int regnum) const;
- gdbarch *arch () const;
+ int num_raw_registers () const;
- address_space *aspace () const
- {
- return m_aspace;
- }
+ gdb_byte *register_buffer (int regnum) const;
+ /* Save a register cache. The set of registers saved into the
+ regcache determined by the save_reggroup. COOKED_READ returns
+ zero iff the register's value can't be returned. */
void save (regcache_cooked_read_ftype *cooked_read, void *src);
- enum register_status cooked_read (int regnum, gdb_byte *buf);
- void cooked_write (int regnum, const gdb_byte *buf);
+ struct regcache_descr *m_descr;
+
+ bool m_has_pseudo;
+ /* The register buffers. */
+ gdb_byte *m_registers;
+ /* Register cache status. */
+ signed char *m_register_status;
+
+ friend class regcache;
+ friend class detached_regcache;
+};
+
+/* An abstract class which only has methods doing read. */
+
+class readable_regcache : public reg_buffer
+{
+public:
+ readable_regcache (gdbarch *gdbarch, bool has_pseudo)
+ : reg_buffer (gdbarch, has_pseudo)
+ {}
enum register_status raw_read (int regnum, gdb_byte *buf);
- void raw_write (int regnum, const gdb_byte *buf);
+ template<typename T, typename = RequireLongest<T>>
+ enum register_status raw_read (int regnum, T *val);
- enum register_status raw_read_signed (int regnum, LONGEST *val);
+ enum register_status raw_read_part (int regnum, int offset, int len,
+ gdb_byte *buf);
- void raw_write_signed (int regnum, LONGEST val);
+ virtual void raw_update (int regnum) = 0;
- enum register_status raw_read_unsigned (int regnum, ULONGEST *val);
+ enum register_status cooked_read (int regnum, gdb_byte *buf);
+ template<typename T, typename = RequireLongest<T>>
+ enum register_status cooked_read (int regnum, T *val);
- void raw_write_unsigned (int regnum, ULONGEST val);
+ enum register_status cooked_read_part (int regnum, int offset, int len,
+ gdb_byte *buf);
struct value *cooked_read_value (int regnum);
- enum register_status cooked_read_signed (int regnum, LONGEST *val);
+protected:
+ enum register_status read_part (int regnum, int offset, int len, void *in,
+ bool is_raw);
+};
- void cooked_write_signed (int regnum, LONGEST val);
+/* Buffer of registers, can be read and written. */
- enum register_status cooked_read_unsigned (int regnum, ULONGEST *val);
+class detached_regcache : public readable_regcache
+{
+public:
+ detached_regcache (gdbarch *gdbarch, bool has_pseudo)
+ : readable_regcache (gdbarch, has_pseudo)
+ {}
- void cooked_write_unsigned (int regnum, ULONGEST val);
+ void raw_supply (int regnum, const void *buf);
- void raw_update (int regnum);
+ void raw_supply (int regnum, const reg_buffer &src)
+ {
+ raw_supply (regnum, src.register_buffer (regnum));
+ }
- void raw_collect (int regnum, void *buf) const;
+ void raw_update (int regnum) override
+ {}
- void raw_supply (int regnum, const void *buf);
+ void raw_supply_integer (int regnum, const gdb_byte *addr, int addr_len,
+ bool is_signed);
void raw_supply_zeroed (int regnum);
- enum register_status get_register_status (int regnum) const;
+ void invalidate (int regnum);
- void raw_set_cached_value (int regnum, const gdb_byte *buf);
+ DISABLE_COPY_AND_ASSIGN (detached_regcache);
+};
- void invalidate (int regnum);
+class readonly_detached_regcache;
- enum register_status raw_read_part (int regnum, int offset, int len,
- gdb_byte *buf);
+/* The register cache for storing raw register values. */
- void raw_write_part (int regnum, int offset, int len, const gdb_byte *buf);
+class regcache : public detached_regcache
+{
+public:
+ DISABLE_COPY_AND_ASSIGN (regcache);
- enum register_status cooked_read_part (int regnum, int offset, int len,
- gdb_byte *buf);
+ /* Return REGCACHE's address space. */
+ const address_space *aspace () const
+ {
+ return m_aspace;
+ }
+
+ /* Restore 'this' regcache. The set of registers restored into
+ the regcache determined by the restore_reggroup.
+ Writes to regcache will go through to the target. SRC is a
+ read-only register cache. */
+ void restore (readonly_detached_regcache *src);
+
+ void cooked_write (int regnum, const gdb_byte *buf);
+
+ void raw_write (int regnum, const gdb_byte *buf);
+
+ template<typename T, typename = RequireLongest<T>>
+ void raw_write (int regnum, T val);
+
+ template<typename T, typename = RequireLongest<T>>
+ void cooked_write (int regnum, T val);
+
+ void raw_update (int regnum) override;
+
+ void raw_collect (int regnum, void *buf) const;
+
+ void raw_collect_integer (int regnum, gdb_byte *addr, int addr_len,
+ bool is_signed) const;
+
+ void raw_write_part (int regnum, int offset, int len, const gdb_byte *buf);
void cooked_write_part (int regnum, int offset, int len,
const gdb_byte *buf);
void collect_regset (const struct regset *regset, int regnum,
void *buf, size_t size) const;
- void dump (ui_file *file, enum regcache_dump_what what_to_dump);
-
ptid_t ptid () const
{
return m_ptid;
static void regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid);
protected:
- regcache (gdbarch *gdbarch, address_space *aspace_, bool readonly_p_);
-
+ regcache (gdbarch *gdbarch, const address_space *aspace_);
static std::forward_list<regcache *> current_regcache;
private:
- gdb_byte *register_buffer (int regnum) const;
-
- void restore (struct regcache *src);
-
- void cpy_no_passthrough (struct regcache *src);
-
- enum register_status xfer_part (int regnum, int offset, int len, void *in,
- const void *out,
- decltype (regcache_raw_read) read,
- decltype (regcache_raw_write) write);
void transfer_regset (const struct regset *regset,
struct regcache *out_regcache,
int regnum, const void *in_buf,
void *out_buf, size_t size) const;
- struct regcache_descr *m_descr;
+ enum register_status write_part (int regnum, int offset, int len,
+ const void *out, bool is_raw);
+
/* The address space of this register cache (for registers where it
makes sense, like PC or SP). */
- struct address_space *m_aspace;
+ const address_space * const m_aspace;
- /* The register buffers. A read-only register cache can hold the
- full [0 .. gdbarch_num_regs + gdbarch_num_pseudo_regs) while a read/write
- register cache can only hold [0 .. gdbarch_num_regs). */
- gdb_byte *m_registers;
- /* Register cache status. */
- signed char *m_register_status;
- /* Is this a read-only cache? A read-only cache is used for saving
- the target's register state (e.g, across an inferior function
- call or just before forcing a function return). A read-only
- cache can only be updated via the methods regcache_dup() and
- regcache_cpy(). The actual contents are determined by the
- reggroup_save and reggroup_restore methods. */
- bool m_readonly_p;
/* If this is a read-write cache, which thread's registers is
it connected to? */
ptid_t m_ptid;
friend void
registers_changed_ptid (ptid_t ptid);
-
- friend void
- regcache_cpy (struct regcache *dst, struct regcache *src);
};
-/* Copy/duplicate the contents of a register cache. By default, the
- operation is pass-through. Writes to DST and reads from SRC will
- go through to the target. See also regcache_cpy_no_passthrough.
+class readonly_detached_regcache : public readable_regcache
+{
+public:
+ readonly_detached_regcache (const regcache &src);
- regcache_cpy can not have overlapping SRC and DST buffers. */
+ /* Create a readonly regcache by getting contents from COOKED_READ. */
+
+ readonly_detached_regcache (gdbarch *gdbarch,
+ regcache_cooked_read_ftype *cooked_read,
+ void *src)
+ : readable_regcache (gdbarch, true)
+ {
+ save (cooked_read, src);
+ }
-extern struct regcache *regcache_dup (struct regcache *regcache);
-extern void regcache_cpy (struct regcache *dest, struct regcache *src);
+ DISABLE_COPY_AND_ASSIGN (readonly_detached_regcache);
+
+ void raw_update (int regnum) override
+ {}
+};
extern void registers_changed (void);
extern void registers_changed_ptid (ptid_t);
+/* An abstract base class for register dump. */
+
+class register_dump
+{
+public:
+ void dump (ui_file *file);
+ virtual ~register_dump () = default;
+
+protected:
+ register_dump (gdbarch *arch)
+ : m_gdbarch (arch)
+ {}
+
+ /* Dump the register REGNUM contents. If REGNUM is -1, print the
+ header. */
+ virtual void dump_reg (ui_file *file, int regnum) = 0;
+
+ gdbarch *m_gdbarch;
+};
+
#endif /* REGCACHE_H */
projects / deliverable / binutils-gdb.git / blobdiff