X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fregcache.h;h=8423f57e0eb19fa6da240ef05081f7b3702551d4;hb=9f1b45b0da430a7a7abf9e54acbe6f2ef9d3a763;hp=98c9c90d76241a1e7383de5849035b759598ef74;hpb=23a6d36940157c674aedaf5a9d4b38676ea0d9e9;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/regcache.h b/gdb/regcache.h index 98c9c90d76..8423f57e0e 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 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, - 2001, 2002 Free Software Foundation, Inc. + 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 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, @@ -16,69 +15,110 @@ 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., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + along with this program. If not, see . */ #ifndef REGCACHE_H #define REGCACHE_H struct regcache; 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 + { + /* 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. */ + regcache. The read variants return the status of the register. */ -void regcache_raw_read (struct regcache *regcache, int rawnum, void *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 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); + 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 a raw registers. These perform read, modify, - write style operations. */ +/* 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, void *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 void *buf); + int offset, int len, const gdb_byte *buf); + +void regcache_invalidate (struct regcache *regcache, int regnum); -int regcache_valid_p (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, void *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 void *buf); + 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, @@ -87,75 +127,36 @@ 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, void *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 void *buf); + 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_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); -/* The register's ``offset''. - - 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. */ - -extern int register_offset_hack (struct gdbarch *gdbarch, 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. - - FIXME: cagney/2002-08-17: A number of architectures, including the - MIPS, are currently broken in this regard. */ + 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. - - 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. */ + one size. */ extern int register_size (struct gdbarch *gdbarch, int regnum); @@ -165,14 +166,13 @@ 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, void *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 *src); -extern void regcache_restore (struct regcache *dst, - regcache_cooked_read_ftype *cooked_read, - void *src); + 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 @@ -184,72 +184,11 @@ extern void regcache_restore (struct regcache *dst, 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 regcache_raw_supply(). 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 - regcache_raw_supply() 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 - 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 regcache_cpy_no_passthrough (struct regcache *dest, + struct regcache *src); 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 */