/* Cache and manage the values of registers for GDB, the GNU debugger.
- Copyright (C) 1986-2018 Free Software Foundation, Inc.
+ Copyright (C) 1986-2019 Free Software Foundation, Inc.
This file is part of GDB.
#ifndef REGCACHE_H
#define REGCACHE_H
-#include "common-regcache.h"
+#include "gdbsupport/common-regcache.h"
+#include "gdbsupport/function-view.h"
#include <forward_list>
struct regcache;
struct regset;
struct gdbarch;
struct address_space;
+class thread_info;
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 *,
/* Special routines to read/write the PC. */
-/* For regcache_read_pc see common/common-regcache.h. */
+/* For regcache_read_pc see gdbsupport/common-regcache.h. */
extern void regcache_write_pc (struct regcache *regcache, CORE_ADDR pc);
/* 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:
+ in the '*regset' functions below and with traditional frame caches.
+ In an array of 'regcache_map_entry' each element is interpreted
+ like follows:
- If 'regno' is a register number: Map register 'regno' to the
current offset (starting with 0) and increase the current offset
by 'size' (or the register's size, if 'size' is zero). Repeat
this with consecutive register numbers up to 'regno+count-1'.
+ For each described register, if 'size' is larger than the
+ register's size, the register's value is assumed to be stored in
+ the first N (where N is the register size) bytes at the current
+ offset. The remaining 'size' - N bytes are filled with zeroes by
+ 'regcache_collect_regset' and ignored by other consumers.
+
+ If 'size' is smaller than the register's size, only the first
+ 'size' bytes of a register's value are assumed to be stored at
+ the current offset. 'regcache_collect_regset' copies the first
+ 'size' bytes of a register's value to the output buffer.
+ 'regcache_supply_regset' copies the bytes from the input buffer
+ into the first 'size' bytes of the register's value leaving the
+ remaining bytes of the register's value unchanged. Frame caches
+ read the 'size' bytes from the stack frame and zero extend them
+ to generate the register's value.
+
- If 'regno' is REGCACHE_MAP_SKIP: Add 'count*size' to the current
offset.
REGCACHE_MAP_SKIP = -1,
};
+/* Calculate and return the total size of all the registers in a
+ regcache_map_entry. */
+
+static inline int
+regcache_map_entry_size (const struct regcache_map_entry *map)
+{
+ int size = 0;
+ for (int i = 0; map[i].count != 0; i++)
+ size += (map[i].count * map[i].size);
+ return size;
+}
+
/* Transfer a set of registers (as described by REGSET) between
REGCACHE and BUF. If REGNUM == -1, transfer all registers
belonging to the regset, otherwise just the register numbered
extern int register_size (struct gdbarch *gdbarch, int regnum);
-typedef enum register_status (regcache_cooked_read_ftype) (void *src,
- int regnum,
- gdb_byte *buf);
+typedef gdb::function_view<register_status (int regnum, gdb_byte *buf)>
+ register_read_ftype;
/* A (register_number, register_value) pair. */
/* Return regcache's architecture. */
gdbarch *arch () const;
- /* See common/common-regcache.h. */
+ /* See gdbsupport/common-regcache.h. */
enum register_status get_register_status (int regnum) const override;
- /* See common/common-regcache.h. */
+ /* See gdbsupport/common-regcache.h. */
void raw_collect (int regnum, void *buf) const override;
/* Collect register REGNUM from REGCACHE. Store collected value as an integer
void raw_collect_integer (int regnum, gdb_byte *addr, int addr_len,
bool is_signed) const;
- /* See common/common-regcache.h. */
+ /* Collect register REGNUM from REGCACHE, starting at OFFSET in register,
+ reading only LEN. */
+ void raw_collect_part (int regnum, int offset, int len, gdb_byte *out) const;
+
+ /* See gdbsupport/common-regcache.h. */
void raw_supply (int regnum, const void *buf) override;
void raw_supply (int regnum, const reg_buffer &src)
unavailable). */
void raw_supply_zeroed (int regnum);
+ /* Supply register REGNUM to REGCACHE, starting at OFFSET in register, writing
+ only LEN, without editing the rest of the register. */
+ void raw_supply_part (int regnum, int offset, int len, const gdb_byte *in);
+
void invalidate (int regnum);
virtual ~reg_buffer () = default;
- /* See common/common-regcache.h. */
+ /* See gdbsupport/common-regcache.h. */
bool raw_compare (int regnum, const void *buf, int offset) const override;
protected:
/* 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);
+ void save (register_read_ftype cooked_read);
struct regcache_descr *m_descr;
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);
};
/* Buffer of registers, can be read and written. */
debug. */
void debug_print_register (const char *func, int regno);
- static void regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid);
protected:
regcache (gdbarch *gdbarch, const address_space *aspace_);
- static std::forward_list<regcache *> current_regcache;
private:
+ /* Helper function for transfer_regset. Copies across a single register. */
+ void transfer_regset_register (struct regcache *out_regcache, int regnum,
+ const gdb_byte *in_buf, gdb_byte *out_buf,
+ int slot_size, int offs) const;
+
+ /* 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. */
void transfer_regset (const struct regset *regset,
struct regcache *out_regcache,
- int regnum, const void *in_buf,
- void *out_buf, size_t size) const;
+ int regnum, const gdb_byte *in_buf,
+ gdb_byte *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). */
class readonly_detached_regcache : public readable_regcache
{
public:
- readonly_detached_regcache (const regcache &src);
+ readonly_detached_regcache (regcache &src);
/* Create a readonly regcache by getting contents from COOKED_READ. */
- readonly_detached_regcache (gdbarch *gdbarch,
- regcache_cooked_read_ftype *cooked_read,
- void *src)
+ readonly_detached_regcache (gdbarch *gdbarch, register_read_ftype cooked_read)
: readable_regcache (gdbarch, true)
{
- save (cooked_read, src);
+ save (cooked_read);
}
DISABLE_COPY_AND_ASSIGN (readonly_detached_regcache);
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
projects / deliverable / binutils-gdb.git / blobdiff