0b3092721e
These functions are intended to suit all targets that don't require too special logic in their regset supply/collect methods. Having such generic functions helps reducing target-specific complexity.
239 lines
8.7 KiB
C
239 lines
8.7 KiB
C
/* Cache and manage the values of registers for GDB, the GNU debugger.
|
|
|
|
Copyright (C) 1986-2014 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/>. */
|
|
|
|
#ifndef REGCACHE_H
|
|
#define REGCACHE_H
|
|
|
|
struct regcache;
|
|
struct gdbarch;
|
|
struct address_space;
|
|
|
|
extern struct regcache *get_current_regcache (void);
|
|
extern struct regcache *get_thread_regcache (ptid_t ptid);
|
|
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 *);
|
|
|
|
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 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
|
|
{
|
|
/* The register value is not in the cache, and we don't know yet
|
|
whether it's available in the target (or traceframe). */
|
|
REG_UNKNOWN = 0,
|
|
|
|
/* The register value is valid and cached. */
|
|
REG_VALID = 1,
|
|
|
|
/* The register value is unavailable. E.g., we're inspecting a
|
|
traceframe, and this register wasn't collected. Note that this
|
|
is different a different "unavailable" from saying the register
|
|
does not exist in the target's architecture --- in that case,
|
|
the target should have given us a target description that does
|
|
not include the register in the first place. */
|
|
REG_UNAVAILABLE = -1
|
|
};
|
|
|
|
enum register_status regcache_register_status (const 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 enum register_status
|
|
regcache_raw_read_unsigned (struct regcache *regcache,
|
|
int regnum, ULONGEST *val);
|
|
extern void regcache_raw_write_signed (struct regcache *regcache,
|
|
int regnum, LONGEST val);
|
|
extern void regcache_raw_write_unsigned (struct regcache *regcache,
|
|
int regnum, ULONGEST val);
|
|
|
|
/* 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,
|
|
int regnum, LONGEST *val);
|
|
extern enum register_status
|
|
regcache_cooked_read_unsigned (struct regcache *regcache,
|
|
int regnum, ULONGEST *val);
|
|
extern void regcache_cooked_write_signed (struct regcache *regcache,
|
|
int regnum, LONGEST val);
|
|
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. */
|
|
|
|
extern CORE_ADDR regcache_read_pc (struct regcache *regcache);
|
|
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:
|
|
|
|
- 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'.
|
|
|
|
- If 'regno' is REGCACHE_MAP_SKIP: Add 'count*size' to the current
|
|
offset.
|
|
|
|
- If count=0: End of the map. */
|
|
|
|
struct regcache_map_entry
|
|
{
|
|
int count;
|
|
int regno;
|
|
int size;
|
|
};
|
|
|
|
/* Special value for the 'regno' field in the struct above. */
|
|
|
|
enum
|
|
{
|
|
REGCACHE_MAP_SKIP = -1,
|
|
};
|
|
|
|
/* 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
|
|
REGNUM. The REGSET's 'regmap' field must point to an array of
|
|
'struct regcache_map_entry'.
|
|
|
|
These functions are suitable for the 'regset_supply' and
|
|
'regset_collect' fields in a regset structure. */
|
|
|
|
extern void regcache_supply_regset (const struct regset *regset,
|
|
struct regcache *regcache,
|
|
int regnum, const void *buf,
|
|
size_t size);
|
|
extern void regcache_collect_regset (const struct regset *regset,
|
|
const struct regcache *regcache,
|
|
int regnum, void *buf, size_t size);
|
|
|
|
|
|
/* The type of a register. This function is slightly more efficient
|
|
then its gdbarch vector counterpart since it returns a precomputed
|
|
value stored in a table. */
|
|
|
|
extern struct type *register_type (struct gdbarch *gdbarch, int regnum);
|
|
|
|
|
|
/* Return the size of register REGNUM. All registers should have only
|
|
one size. */
|
|
|
|
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);
|
|
|
|
/* 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.
|
|
|
|
The ``cpy'' functions can not have overlapping SRC and DST buffers.
|
|
|
|
``no passthrough'' versions do not go through to the target. They
|
|
only transfer values already in the cache. */
|
|
|
|
extern struct regcache *regcache_dup (struct regcache *regcache);
|
|
extern void regcache_cpy (struct regcache *dest, struct regcache *src);
|
|
extern void regcache_cpy_no_passthrough (struct regcache *dest,
|
|
struct regcache *src);
|
|
|
|
extern void registers_changed (void);
|
|
extern void registers_changed_ptid (ptid_t);
|
|
|
|
#endif /* REGCACHE_H */
|