X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fregcache.h;h=11a8bb98d69d0c32def1d3f5d2d68dd82900357f;hb=1a9ccd70f9a75dc6b48d340059f28ef3550c107b;hp=5f8ce75062673d826c55ef970e445a61c2459792;hpb=0fb0cc7590113e9b459dfcc48dc71c9d419d9580;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/regcache.h b/gdb/regcache.h index 5f8ce75062..11a8bb98d6 100644 --- a/gdb/regcache.h +++ b/gdb/regcache.h @@ -1,7 +1,6 @@ /* 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, 2008, 2009 Free Software Foundation, Inc. + Copyright (C) 1986-2016 Free Software Foundation, Inc. This file is part of GDB. @@ -21,66 +20,102 @@ #ifndef REGCACHE_H #define REGCACHE_H +#include "common-regcache.h" + struct regcache; +struct regset; 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 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. */ +/* Return the register's value in signed or throw if it's not + available. */ -void regcache_raw_read_part (struct regcache *regcache, int regnum, - int offset, int len, gdb_byte *buf); +extern LONGEST regcache_raw_get_signed (struct regcache *regcache, + int regnum); + +/* 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. */ + +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 (const 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, @@ -89,14 +124,15 @@ 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. */ -extern CORE_ADDR regcache_read_pc (struct regcache *regcache); +/* 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 @@ -108,6 +144,51 @@ 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. */ + +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 @@ -127,30 +208,24 @@ 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); extern void registers_changed (void); +extern void registers_changed_ptid (ptid_t); #endif /* REGCACHE_H */