diff options
Diffstat (limited to 'contrib/gdb/gdb/regcache.h')
| -rw-r--r-- | contrib/gdb/gdb/regcache.h | 223 |
1 files changed, 198 insertions, 25 deletions
diff --git a/contrib/gdb/gdb/regcache.h b/contrib/gdb/gdb/regcache.h index 4e854d3..26a1b8a 100644 --- a/contrib/gdb/gdb/regcache.h +++ b/contrib/gdb/gdb/regcache.h @@ -1,6 +1,7 @@ /* Cache and manage the values of registers for GDB, the GNU debugger. - Copyright 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, 2001 - Free Software Foundation, Inc. + + Copyright 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, + 2001, 2002 Free Software Foundation, Inc. This file is part of GDB. @@ -22,48 +23,224 @@ #ifndef REGCACHE_H #define REGCACHE_H +struct regcache; +struct gdbarch; + +extern struct regcache *current_regcache; + +void regcache_xfree (struct regcache *regcache); +struct cleanup *make_cleanup_regcache_xfree (struct regcache *regcache); +struct regcache *regcache_xmalloc (struct gdbarch *gdbarch); + +/* Return REGCACHE's architecture. */ + +extern struct gdbarch *get_regcache_arch (const struct regcache *regcache); + /* Transfer a raw register [0..NUM_REGS) between core-gdb and the regcache. */ -void regcache_read (int rawnum, char *buf); -void regcache_write (int rawnum, char *buf); +void regcache_raw_read (struct regcache *regcache, int rawnum, void *buf); +void regcache_raw_write (struct regcache *regcache, int rawnum, + const void *buf); +extern void regcache_raw_read_signed (struct regcache *regcache, + int regnum, LONGEST *val); +extern void 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 a raw registers. These perform read, modify, + write style operations. */ + +void regcache_raw_read_part (struct regcache *regcache, int regnum, + int offset, int len, void *buf); +void regcache_raw_write_part (struct regcache *regcache, int regnum, + int offset, int len, const void *buf); + +int regcache_valid_p (struct regcache *regcache, int regnum); + +/* Transfer a cooked register [0..NUM_REGS+NUM_PSEUDO_REGS). */ +void regcache_cooked_read (struct regcache *regcache, int rawnum, void *buf); +void regcache_cooked_write (struct regcache *regcache, int rawnum, + const void *buf); + +/* NOTE: cagney/2002-08-13: At present GDB has no reliable mechanism + for indicating when a ``cooked'' register was constructed from + invalid or unavailable ``raw'' registers. One fairly easy way of + adding such a mechanism would be for the cooked functions to return + a register valid indication. Given the possibility of such a + change, the extract functions below use a reference parameter, + rather than a function result. */ + +/* Read a register as a signed/unsigned quantity. */ +extern void regcache_cooked_read_signed (struct regcache *regcache, + int regnum, LONGEST *val); +extern void 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. */ + +void regcache_cooked_read_part (struct regcache *regcache, int regnum, + int offset, int len, void *buf); +void regcache_cooked_write_part (struct regcache *regcache, int regnum, + int offset, int len, const void *buf); /* 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 supply_register (int regnum, char *val); +extern void supply_register (int regnum, const void *val); extern void regcache_collect (int regnum, void *buf); +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); -/* DEPRECATED: Character array containing an image of the inferior - programs' registers for the most recently referenced thread. */ +/* The register's ``offset''. -extern char *registers; + FIXME: cagney/2002-11-07: The frame_register() function, when + specifying the real location of a register, does so using that + registers offset in the register cache. That offset is then used + by valops.c to determine the location of the register. The code + should instead use the register's number and a location expression + to describe a value spread across multiple registers or memory. */ -/* DEPRECATED: Character array containing the current state of each - register (unavailable<0, invalid=0, valid>0) for the most recently - referenced thread. */ +extern int register_offset_hack (struct gdbarch *gdbarch, int regnum); -extern signed char *register_valid; -extern int register_cached (int regnum); +/* 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. + + NOTE: cagney/2002-08-17: The original macro was called + DEPRECATED_REGISTER_VIRTUAL_TYPE. This was because the register + could have different raw and cooked (nee virtual) representations. + The CONVERTABLE methods being used to convert between the two + representations. Current code does not do this. Instead, the + first [0..NUM_REGS) registers are 1:1 raw:cooked, and the type + exactly describes the register's representation. Consequently, the + ``virtual'' has been dropped. -extern void set_register_cached (int regnum, int state); + FIXME: cagney/2002-08-17: A number of architectures, including the + MIPS, are currently broken in this regard. */ + +extern struct type *register_type (struct gdbarch *gdbarch, int regnum); -extern void register_changed (int regnum); -extern void registers_changed (void); +/* Return the size of register REGNUM. All registers should have only + one size. + + FIXME: cagney/2003-02-28: + + Unfortunately, thanks to some legacy architectures, this doesn't + hold. A register's cooked (nee virtual) and raw size can differ + (see MIPS). Such architectures should be using different register + numbers for the different sized views of identical registers. + + Anyway, the up-shot is that, until that mess is fixed, core code + can end up being very confused - should the RAW or VIRTUAL size be + used? As a rule of thumb, use DEPRECATED_REGISTER_VIRTUAL_SIZE in + cooked code, but with the comment: + + OK: REGISTER_VIRTUAL_SIZE + + or just + + OK + + appended to the end of the line. */ + +extern int register_size (struct gdbarch *gdbarch, int regnum); + -extern void registers_fetched (void); +/* 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. */ -extern void read_register_bytes (int regbyte, char *myaddr, int len); +typedef int (regcache_cooked_read_ftype) (void *src, int regnum, void *buf); -extern void read_register_gen (int regnum, char *myaddr); +extern void regcache_save (struct regcache *dst, + regcache_cooked_read_ftype *cooked_read, + void *src); +extern void regcache_restore (struct regcache *dst, + regcache_cooked_read_ftype *cooked_read, + void *src); -extern void write_register_gen (int regnum, char *myaddr); +/* 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 struct regcache *regcache_dup_no_passthrough (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); + +/* NOTE: cagney/2002-11-02: The below have been superseded by the + regcache_cooked_*() functions found above, and the frame_*() + functions found in "frame.h". Take care though, often more than a + simple substitution is required when updating the code. The + change, as far as practical, should avoid adding references to + global variables (e.g., current_regcache, current_frame, + current_gdbarch or deprecated_selected_frame) and instead refer to + the FRAME or REGCACHE that has been passed into the containing + function as parameters. Consequently, the change typically + involves modifying the containing function so that it takes a FRAME + or REGCACHE parameter. In the case of an architecture vector + method, there should already be a non-deprecated variant that is + parameterized with FRAME or REGCACHE. */ + +extern char *deprecated_grub_regcache_for_registers (struct regcache *); +extern void deprecated_read_register_gen (int regnum, char *myaddr); +extern void deprecated_write_register_gen (int regnum, char *myaddr); +extern void deprecated_read_register_bytes (int regbyte, char *myaddr, + int len); +extern void deprecated_write_register_bytes (int regbyte, char *myaddr, + int len); + +/* Character array containing the current state of each register + (unavailable<0, invalid=0, valid>0) for the most recently + referenced thread. This global is often found in close proximity + to code that is directly manipulating the deprecated_registers[] + array. In such cases, it should be possible to replace the lot + with a call to supply_register(). If you find yourself in dire + straits, still needing access to the cache status bit, the + regcache_valid_p() and set_register_cached() functions are + available. */ +extern signed char *deprecated_register_valid; + +/* Character array containing an image of the inferior programs' + registers for the most recently referenced thread. + + NOTE: cagney/2002-11-14: Target side code should be using + supply_register() and/or regcache_collect() while architecture side + code should use the more generic regcache methods. */ + +extern char *deprecated_registers; + +/* NOTE: cagney/2002-11-05: This function, and its co-conspirator + deprecated_registers[], have been superseeded by supply_register(). */ +extern void deprecated_registers_fetched (void); + +extern int register_cached (int regnum); + +extern void set_register_cached (int regnum, int state); + +extern void registers_changed (void); -extern void write_register_bytes (int regbyte, char *myaddr, int len); /* Rename to read_unsigned_register()? */ extern ULONGEST read_register (int regnum); @@ -71,10 +248,6 @@ extern ULONGEST read_register (int regnum); /* Rename to read_unsigned_register_pid()? */ extern ULONGEST read_register_pid (int regnum, ptid_t ptid); -extern LONGEST read_signed_register (int regnum); - -extern LONGEST read_signed_register_pid (int regnum, ptid_t ptid); - extern void write_register (int regnum, LONGEST val); extern void write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid); |
