X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fregcache.h;h=1bb0ce0ec8d030042540855945996bd8e6bda91c;hb=43684a7b844bce64735940b55b667f7086fa3d44;hp=fc24559e4dd191940ce954ed620d7a393433e8f3;hpb=206415a3eac4f69d24cf872f880f554d3d43f1bb;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/regcache.h b/gdb/regcache.h index fc24559e4d..1bb0ce0ec8 100644 --- a/gdb/regcache.h +++ b/gdb/regcache.h @@ -1,13 +1,12 @@ /* Cache and manage the values of registers for GDB, the GNU debugger. - Copyright (C) 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, 2001, - 2002, 2007 Free Software Foundation, Inc. + Copyright (C) 1986-2016 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 2 of the License, or + 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, @@ -16,70 +15,101 @@ 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, write to the Free Software - Foundation, Inc., 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. */ + along with this program. If not, see . */ #ifndef REGCACHE_H #define REGCACHE_H +#include "common-regcache.h" + struct regcache; +struct regset; struct gdbarch; +struct address_space; -extern struct regcache *current_regcache; +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 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 regcache_register_status (const struct regcache *regcache, + int regnum); + /* Transfer a raw register [0..NUM_REGS) between core-gdb and the - regcache. */ + regcache. The read variants return the status of the register. */ -void regcache_raw_read (struct regcache *regcache, int rawnum, gdb_byte *buf); +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 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 enum register_status + regcache_raw_read_signed (struct regcache *regcache, + int regnum, LONGEST *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. */ +/* 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. */ -void regcache_raw_read_part (struct regcache *regcache, int regnum, - int offset, int len, gdb_byte *buf); +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); -int regcache_valid_p (struct regcache *regcache, int regnum); +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). */ -void regcache_cooked_read (struct regcache *regcache, int rawnum, - gdb_byte *buf); +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); -/* 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 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 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 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, @@ -88,11 +118,17 @@ extern void regcache_cooked_write_unsigned (struct regcache *regcache, /* 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, gdb_byte *buf); +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(). */ @@ -102,17 +138,50 @@ extern void regcache_raw_supply (struct regcache *regcache, 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. */ -/* The register's ``offset''. +struct regcache_map_entry +{ + int count; + int regno; + int size; +}; - 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. */ +/* Special value for the 'regno' field in the struct above. */ -extern int register_offset_hack (struct gdbarch *gdbarch, int regnum); +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 @@ -133,66 +202,24 @@ extern int register_size (struct gdbarch *gdbarch, int regnum); restore_reggroup respectively. COOKED_READ returns zero iff the register's value can't be returned. */ -typedef int (regcache_cooked_read_ftype) (void *src, int regnum, - gdb_byte *buf); +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); -extern void regcache_restore (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. + go through to the target. See also regcache_cpy_no_passthrough. - ``no passthrough'' versions do not go through to the target. They - only transfer values already in the cache. */ + regcache_cpy can not have overlapping SRC and DST buffers. */ 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 the 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 void deprecated_read_register_gen (int regnum, gdb_byte *myaddr); -extern void deprecated_write_register_gen (int regnum, gdb_byte *myaddr); - -/* NOTE: cagney/2002-11-05: This function has been superseeded by - regcache_raw_supply(). */ -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); - - -/* Rename to read_unsigned_register()? */ -extern ULONGEST read_register (int regnum); - -/* Rename to read_unsigned_register_pid()? */ -extern ULONGEST read_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); +extern void registers_changed_ptid (ptid_t); #endif /* REGCACHE_H */