extern struct regcache *get_current_regcache (void);
extern struct regcache *get_thread_regcache (ptid_t ptid);
+
+/* Get the regcache of THREAD. */
+extern struct regcache *get_thread_regcache (thread_info *thread);
+
extern struct regcache *get_thread_arch_regcache (ptid_t, struct gdbarch *);
extern struct regcache *get_thread_arch_aspace_regcache (ptid_t,
struct gdbarch *,
struct address_space *);
-/* Return REGCACHE's ptid. */
-
-extern ptid_t regcache_get_ptid (const struct regcache *regcache);
-
-enum register_status regcache_register_status (const struct regcache *regcache,
- int regnum);
-
-/* Make certain that the register REGNUM in REGCACHE is up-to-date. */
-
-void regcache_raw_update (struct regcache *regcache, int regnum);
-
-/* Transfer a raw register [0..NUM_REGS) between core-gdb and the
- regcache. The read variants return the status of the register. */
-
-enum register_status regcache_raw_read (struct regcache *regcache,
- int rawnum, gdb_byte *buf);
-void regcache_raw_write (struct regcache *regcache, int rawnum,
- const gdb_byte *buf);
extern enum register_status
regcache_raw_read_signed (struct regcache *regcache,
int regnum, LONGEST *val);
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 new. */
-
-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 enum register_status
- regcache_raw_read_part (struct regcache *regcache, int regnum,
- int offset, int len, gdb_byte *buf);
-void regcache_raw_write_part (struct regcache *regcache, int regnum,
- int offset, int len, const gdb_byte *buf);
-
-void regcache_invalidate (struct regcache *regcache, int regnum);
-
-/* Transfer of pseudo-registers. The read variants return a register
- status, as an indication of when a ``cooked'' register was
- constructed from valid, invalid or unavailable ``raw''
- registers. */
-
-/* Transfer a cooked register [0..NUM_REGS+NUM_PSEUDO_REGS). */
-enum register_status regcache_cooked_read (struct regcache *regcache,
- int rawnum, gdb_byte *buf);
-void regcache_cooked_write (struct regcache *regcache, int rawnum,
- const gdb_byte *buf);
-
-/* Read register REGNUM from REGCACHE and return a new value. This
- will call mark_value_bytes_unavailable as appropriate. */
-
-struct value *regcache_cooked_read_value (struct regcache *regcache,
- int regnum);
-
/* Read a register as a signed/unsigned quantity. */
extern enum register_status
regcache_cooked_read_signed (struct regcache *regcache,
extern void regcache_cooked_write_unsigned (struct regcache *regcache,
int regnum, ULONGEST val);
-/* Partial transfer of a cooked register. These perform read, modify,
- write style operations. */
-
-enum register_status regcache_cooked_read_part (struct regcache *regcache,
- int regnum, int offset,
- int len, gdb_byte *buf);
-void regcache_cooked_write_part (struct regcache *regcache, int regnum,
- int offset, int len, const gdb_byte *buf);
-
/* Special routines to read/write the PC. */
/* For regcache_read_pc see common/common-regcache.h. */
extern void regcache_write_pc (struct regcache *regcache, CORE_ADDR pc);
-/* Transfer a raw register [0..NUM_REGS) between the regcache and the
- target. These functions are called by the target in response to a
- target_fetch_registers() or target_store_registers(). */
-
-extern void regcache_raw_supply (struct regcache *regcache,
- int regnum, const void *buf);
-extern void regcache_raw_collect (const struct regcache *regcache,
- int regnum, void *buf);
-
/* Mapping between register numbers and offsets in a buffer, for use
in the '*regset' functions below. In an array of
'regcache_map_entry' each element is interpreted like follows:
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);
-
-enum regcache_dump_what
-{
- regcache_dump_none, regcache_dump_raw,
- regcache_dump_cooked, regcache_dump_groups,
- regcache_dump_remote
-};
+typedef gdb::function_view<register_status (int regnum, gdb_byte *buf)>
+ register_read_ftype;
/* A (register_number, register_value) pair. */
/* Buffer of registers. */
-class reg_buffer
+class reg_buffer : public reg_buffer_common
{
public:
reg_buffer (gdbarch *gdbarch, bool has_pseudo);
/* Return regcache's architecture. */
gdbarch *arch () const;
- virtual ~reg_buffer ()
+ /* See common/common-regcache.h. */
+ enum register_status get_register_status (int regnum) const override;
+
+ /* See common/common-regcache.h. */
+ void raw_collect (int regnum, void *buf) const override;
+
+ /* 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 raw_collect_integer (int regnum, gdb_byte *addr, int addr_len,
+ bool is_signed) const;
+
+ /* See common/common-regcache.h. */
+ void raw_supply (int regnum, const void *buf) override;
+
+ void raw_supply (int regnum, const reg_buffer &src)
{
- xfree (m_registers);
- xfree (m_register_status);
+ raw_supply (regnum, src.register_buffer (regnum));
}
+ /* 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 raw_supply_integer (int regnum, const gdb_byte *addr, int addr_len,
+ bool is_signed);
+
+ /* 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 raw_supply_zeroed (int regnum);
+
+ void invalidate (int regnum);
+
+ virtual ~reg_buffer () = default;
+
+ /* See common/common-regcache.h. */
+ bool raw_compare (int regnum, const void *buf, int offset) const override;
+
protected:
/* Assert on the range of REGNUM. */
void assert_regnum (int regnum) const;
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 (register_read_ftype cooked_read);
+
struct regcache_descr *m_descr;
bool m_has_pseudo;
/* The register buffers. */
- gdb_byte *m_registers;
+ std::unique_ptr<gdb_byte[]> m_registers;
/* Register cache status. */
- signed char *m_register_status;
+ std::unique_ptr<register_status[]> m_register_status;
+
+ friend class regcache;
+ friend class detached_regcache;
};
/* An abstract class which only has methods doing read. */
: reg_buffer (gdbarch, has_pseudo)
{}
+ /* Transfer a raw register [0..NUM_REGS) from core-gdb to this regcache,
+ return its value in *BUF and return its availability status. */
+
enum register_status raw_read (int regnum, gdb_byte *buf);
template<typename T, typename = RequireLongest<T>>
enum register_status raw_read (int regnum, T *val);
+ /* Partial transfer of raw registers. Return the status of the register. */
enum register_status raw_read_part (int regnum, int offset, int len,
gdb_byte *buf);
+ /* Make certain that the register REGNUM is up-to-date. */
virtual void raw_update (int regnum) = 0;
+ /* Transfer a raw register [0..NUM_REGS+NUM_PSEUDO_REGS) from core-gdb to
+ this regcache, return its value in *BUF and return its availability status. */
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);
+ /* Partial transfer of a cooked register. */
enum register_status cooked_read_part (int regnum, int offset, int len,
gdb_byte *buf);
+ /* Read register REGNUM from the regcache and return a new value. This
+ will call mark_value_bytes_unavailable as appropriate. */
struct value *cooked_read_value (int regnum);
protected:
- enum register_status read_part (int regnum, int offset, int len, void *in,
- bool is_raw);
+
+ /* Perform a partial register transfer using a read, modify, write
+ operation. Will fail if register is currently invalid. */
+ enum register_status read_part (int regnum, int offset, int len,
+ gdb_byte *out, bool is_raw);
};
-/* The register cache for storing raw register values. */
+/* Buffer of registers, can be read and written. */
-class regcache : public readable_regcache
+class detached_regcache : public readable_regcache
{
public:
- regcache (gdbarch *gdbarch)
- : regcache (gdbarch, nullptr, true)
+ detached_regcache (gdbarch *gdbarch, bool has_pseudo)
+ : readable_regcache (gdbarch, has_pseudo)
{}
- struct readonly_t {};
- static constexpr readonly_t readonly {};
+ void raw_update (int regnum) override
+ {}
- /* Create a readonly regcache from a non-readonly regcache. */
- regcache (readonly_t, const regcache &src);
+ DISABLE_COPY_AND_ASSIGN (detached_regcache);
+};
+
+class readonly_detached_regcache;
+
+/* The register cache for storing raw register values. */
+class regcache : public detached_regcache
+{
+public:
DISABLE_COPY_AND_ASSIGN (regcache);
/* Return REGCACHE's address space. */
return m_aspace;
}
- void save (regcache_cooked_read_ftype *cooked_read, void *src);
+ /* 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);
+ /* Update the value of raw register REGNUM (in the range [0..NUM_REGS)) and
+ transfer its value to core-gdb. */
void raw_write (int regnum, const gdb_byte *buf);
template<typename T, typename = RequireLongest<T>>
void raw_write (int regnum, T val);
+ /* Transfer of pseudo-registers. */
+ void cooked_write (int regnum, const gdb_byte *buf);
+
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_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 raw_set_cached_value (int regnum, const gdb_byte *buf);
-
- void invalidate (int regnum);
-
+ /* Partial transfer of raw registers. Perform read, modify, write style
+ operations. */
void raw_write_part (int regnum, int offset, int len, const gdb_byte *buf);
+ /* Partial transfer of a cooked register. Perform read, modify, write style
+ operations. */
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);
+ /* Return REGCACHE's ptid. */
ptid_t ptid () const
{
+ gdb_assert (m_ptid != minus_one_ptid);
+
return m_ptid;
}
static void regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid);
protected:
- regcache (gdbarch *gdbarch, const address_space *aspace_, bool readonly_p_);
+ regcache (gdbarch *gdbarch, const address_space *aspace_);
+
static std::forward_list<regcache *> current_regcache;
private:
- void restore (struct regcache *src);
void transfer_regset (const struct regset *regset,
struct regcache *out_regcache,
int regnum, const void *in_buf,
void *out_buf, size_t size) const;
+ /* Perform a partial register transfer using a read, modify, write
+ operation. */
enum register_status write_part (int regnum, int offset, int len,
- const void *out, bool is_raw);
-
+ const gdb_byte *in, bool is_raw);
/* The address space of this register cache (for registers where it
makes sense, like PC or SP). */
const address_space * const m_aspace;
- /* 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. */
- const 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);
};
-/* Duplicate the contents of a register cache to a read-only register
- cache. The operation is pass-through. */
-extern struct regcache *regcache_dup (struct regcache *regcache);
+class readonly_detached_regcache : public readable_regcache
+{
+public:
+ readonly_detached_regcache (regcache &src);
+
+ /* Create a readonly regcache by getting contents from COOKED_READ. */
+
+ readonly_detached_regcache (gdbarch *gdbarch, register_read_ftype cooked_read)
+ : readable_regcache (gdbarch, true)
+ {
+ save (cooked_read);
+ }
+
+ DISABLE_COPY_AND_ASSIGN (readonly_detached_regcache);
-/* Writes to DEST will go through to the target. SRC is a read-only
- register cache. */
-extern void regcache_cpy (struct regcache *dest, struct regcache *src);
+ void raw_update (int regnum) override
+ {}
+};
extern void registers_changed (void);
extern void registers_changed_ptid (ptid_t);
+/* Indicate that registers of THREAD may have changed, so invalidate
+ the cache. */
+extern void registers_changed_thread (thread_info *thread);
+
+/* 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