/* Cache and manage the values of registers for GDB, the GNU debugger.
- Copyright 1986, 87, 89, 91, 94, 95, 96, 1998, 2000, 2001
- Free Software Foundation, Inc.
+
+ Copyright (C) 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, 2001,
+ 2002, 2004, 2007, 2008 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,
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 <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "frame.h"
#include "inferior.h"
#include "target.h"
#include "gdbarch.h"
#include "gdbcmd.h"
+#include "regcache.h"
+#include "reggroups.h"
+#include "gdb_assert.h"
+#include "gdb_string.h"
+#include "gdbcmd.h" /* For maintenanceprintlist. */
+#include "observer.h"
/*
* DATA STRUCTURE
* Here is the actual register cache.
*/
-/* NOTE: this is a write-through cache. There is no "dirty" bit for
- recording if the register values have been changed (eg. by the
- user). Therefore all registers must be written back to the
- target when appropriate. */
-
-/* REGISTERS contains the cached register values (in target byte order). */
-
-char *registers;
-
-/* REGISTER_VALID is 0 if the register needs to be fetched,
- 1 if it has been fetched, and
- -1 if the register value was not available.
- "Not available" means don't try to fetch it again. */
-
-signed char *register_valid;
-
-/* The thread/process associated with the current set of registers.
- For now, -1 is special, and means `no current process'. */
-
-static int registers_pid = -1;
-
-/*
- * FUNCTIONS:
- */
-
-/* REGISTER_CACHED()
+/* Per-architecture object describing the layout of a register cache.
+ Computed once when the architecture is created */
- Returns 0 if the value is not in the cache (needs fetch).
- >0 if the value is in the cache.
- <0 if the value is permanently unavailable (don't ask again). */
+struct gdbarch_data *regcache_descr_handle;
-int
-register_cached (int regnum)
+struct regcache_descr
+{
+ /* The architecture this descriptor belongs to. */
+ struct gdbarch *gdbarch;
+
+ /* The raw register cache. Each raw (or hard) register is supplied
+ by the target interface. The raw cache should not contain
+ redundant information - if the PC is constructed from two
+ registers then those registers and not the PC lives in the raw
+ cache. */
+ int nr_raw_registers;
+ long sizeof_raw_registers;
+ long sizeof_raw_register_valid_p;
+
+ /* The cooked register space. Each cooked register in the range
+ [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw
+ register. The remaining [NR_RAW_REGISTERS
+ .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto
+ both raw registers and memory by the architecture methods
+ gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */
+ int nr_cooked_registers;
+ long sizeof_cooked_registers;
+ long sizeof_cooked_register_valid_p;
+
+ /* Offset and size (in 8 bit bytes), of reach register in the
+ register cache. All registers (including those in the range
+ [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an offset.
+ Assigning all registers an offset makes it possible to keep
+ legacy code, such as that found in read_register_bytes() and
+ write_register_bytes() working. */
+ long *register_offset;
+ long *sizeof_register;
+
+ /* Cached table containing the type of each register. */
+ struct type **register_type;
+};
+
+static void *
+init_regcache_descr (struct gdbarch *gdbarch)
{
- return register_valid[regnum];
+ int i;
+ struct regcache_descr *descr;
+ gdb_assert (gdbarch != NULL);
+
+ /* Create an initial, zero filled, table. */
+ descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr);
+ descr->gdbarch = gdbarch;
+
+ /* Total size of the register space. The raw registers are mapped
+ directly onto the raw register cache while the pseudo's are
+ either mapped onto raw-registers or memory. */
+ descr->nr_cooked_registers = gdbarch_num_regs (gdbarch)
+ + gdbarch_num_pseudo_regs (gdbarch);
+ descr->sizeof_cooked_register_valid_p = gdbarch_num_regs (gdbarch)
+ + gdbarch_num_pseudo_regs
+ (gdbarch);
+
+ /* Fill in a table of register types. */
+ descr->register_type
+ = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, struct type *);
+ for (i = 0; i < descr->nr_cooked_registers; i++)
+ descr->register_type[i] = gdbarch_register_type (gdbarch, i);
+
+ /* Construct a strictly RAW register cache. Don't allow pseudo's
+ into the register cache. */
+ descr->nr_raw_registers = gdbarch_num_regs (gdbarch);
+
+ /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p
+ array. This pretects GDB from erant code that accesses elements
+ of the global register_valid_p[] array in the range
+ [gdbarch_num_regs .. gdbarch_num_regs + gdbarch_num_pseudo_regs). */
+ descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p;
+
+ /* Lay out the register cache.
+
+ NOTE: cagney/2002-05-22: Only register_type() is used when
+ constructing the register cache. It is assumed that the
+ register's raw size, virtual size and type length are all the
+ same. */
+
+ {
+ long offset = 0;
+ descr->sizeof_register
+ = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long);
+ descr->register_offset
+ = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long);
+ for (i = 0; i < descr->nr_cooked_registers; i++)
+ {
+ descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]);
+ descr->register_offset[i] = offset;
+ offset += descr->sizeof_register[i];
+ gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]);
+ }
+ /* Set the real size of the register cache buffer. */
+ descr->sizeof_cooked_registers = offset;
+ }
+
+ /* FIXME: cagney/2002-05-22: Should only need to allocate space for
+ the raw registers. Unfortunately some code still accesses the
+ register array directly using the global registers[]. Until that
+ code has been purged, play safe and over allocating the register
+ buffer. Ulgh! */
+ descr->sizeof_raw_registers = descr->sizeof_cooked_registers;
+
+ return descr;
}
-/* Record that REGNUM's value is cached if STATE is >0, uncached but
- fetchable if STATE is 0, and uncached and unfetchable if STATE is <0. */
-
-void
-set_register_cached (int regnum, int state)
+static struct regcache_descr *
+regcache_descr (struct gdbarch *gdbarch)
{
- register_valid[regnum] = state;
+ return gdbarch_data (gdbarch, regcache_descr_handle);
}
-/* REGISTER_CHANGED
+/* Utility functions returning useful register attributes stored in
+ the regcache descr. */
- invalidate a single register REGNUM in the cache */
-void
-register_changed (int regnum)
+struct type *
+register_type (struct gdbarch *gdbarch, int regnum)
{
- set_register_cached (regnum, 0);
+ struct regcache_descr *descr = regcache_descr (gdbarch);
+ gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers);
+ return descr->register_type[regnum];
}
-/* If REGNUM >= 0, return a pointer to register REGNUM's cache buffer area,
- else return a pointer to the start of the cache buffer. */
+/* Utility functions returning useful register attributes stored in
+ the regcache descr. */
-char *
-register_buffer (int regnum)
+int
+register_size (struct gdbarch *gdbarch, int regnum)
{
- if (regnum < 0)
- return registers;
- else
- return ®isters[REGISTER_BYTE (regnum)];
+ struct regcache_descr *descr = regcache_descr (gdbarch);
+ int size;
+ gdb_assert (regnum >= 0
+ && regnum < (gdbarch_num_regs (gdbarch)
+ + gdbarch_num_pseudo_regs (gdbarch)));
+ size = descr->sizeof_register[regnum];
+ return size;
}
-/* Return whether register REGNUM is a real register. */
+/* The register cache for storing raw register values. */
-static int
-real_register (int regnum)
+struct regcache
{
- return regnum >= 0 && regnum < NUM_REGS;
+ struct regcache_descr *descr;
+ /* The register buffers. A read-only register cache can hold the
+ full [0 .. gdbarch_num_regs + gdbarch_num_pseudo_regs) while a read/write
+ register cache can only hold [0 .. gdbarch_num_regs). */
+ gdb_byte *registers;
+ /* Register cache status:
+ register_valid_p[REG] == 0 if REG value is not in the cache
+ > 0 if REG value is in the cache
+ < 0 if REG value is permanently unavailable */
+ signed char *register_valid_p;
+ /* Is this a read-only cache? A read-only cache is used for saving
+ the target's register state (e.g, across an inferior function
+ call or just before forcing a function return). A read-only
+ cache can only be updated via the methods regcache_dup() and
+ regcache_cpy(). The actual contents are determined by the
+ reggroup_save and reggroup_restore methods. */
+ int readonly_p;
+ /* If this is a read-write cache, which thread's registers is
+ it connected to? */
+ ptid_t ptid;
+};
+
+struct regcache *
+regcache_xmalloc (struct gdbarch *gdbarch)
+{
+ struct regcache_descr *descr;
+ struct regcache *regcache;
+ gdb_assert (gdbarch != NULL);
+ descr = regcache_descr (gdbarch);
+ regcache = XMALLOC (struct regcache);
+ regcache->descr = descr;
+ regcache->registers
+ = XCALLOC (descr->sizeof_raw_registers, gdb_byte);
+ regcache->register_valid_p
+ = XCALLOC (descr->sizeof_raw_register_valid_p, gdb_byte);
+ regcache->readonly_p = 1;
+ regcache->ptid = minus_one_ptid;
+ return regcache;
}
-/* Return whether register REGNUM is a pseudo register. */
-
-static int
-pseudo_register (int regnum)
+void
+regcache_xfree (struct regcache *regcache)
{
- return regnum >= NUM_REGS && regnum < NUM_REGS + NUM_PSEUDO_REGS;
+ if (regcache == NULL)
+ return;
+ xfree (regcache->registers);
+ xfree (regcache->register_valid_p);
+ xfree (regcache);
}
-/* Fetch register REGNUM into the cache. */
-
static void
-fetch_register (int regnum)
+do_regcache_xfree (void *data)
{
- if (real_register (regnum))
- target_fetch_registers (regnum);
- else if (pseudo_register (regnum))
- FETCH_PSEUDO_REGISTER (regnum);
+ regcache_xfree (data);
}
-/* Write register REGNUM cached value to the target. */
-
-static void
-store_register (int regnum)
+struct cleanup *
+make_cleanup_regcache_xfree (struct regcache *regcache)
{
- if (real_register (regnum))
- target_store_registers (regnum);
- else if (pseudo_register (regnum))
- STORE_PSEUDO_REGISTER (regnum);
+ return make_cleanup (do_regcache_xfree, regcache);
}
-/* Low level examining and depositing of registers.
-
- The caller is responsible for making sure that the inferior is
- stopped before calling the fetching routines, or it will get
- garbage. (a change from GDB version 3, in which the caller got the
- value from the last stop). */
+/* Return REGCACHE's architecture. */
-/* REGISTERS_CHANGED ()
-
- Indicate that registers may have changed, so invalidate the cache. */
-
-void
-registers_changed (void)
+struct gdbarch *
+get_regcache_arch (const struct regcache *regcache)
{
- int i;
-
- registers_pid = -1;
-
- /* Force cleanup of any alloca areas if using C alloca instead of
- a builtin alloca. This particular call is used to clean up
- areas allocated by low level target code which may build up
- during lengthy interactions between gdb and the target before
- gdb gives control to the user (ie watchpoints). */
- alloca (0);
-
- for (i = 0; i < ARCH_NUM_REGS; i++)
- set_register_cached (i, 0);
-
- /* Assume that if all the hardware regs have changed,
- then so have the pseudo-registers. */
- for (i = NUM_REGS; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
- set_register_cached (i, 0);
-
- if (registers_changed_hook)
- registers_changed_hook ();
+ return regcache->descr->gdbarch;
}
-/* REGISTERS_FETCHED ()
-
- Indicate that all registers have been fetched, so mark them all valid. */
+/* Return a pointer to register REGNUM's buffer cache. */
-
-void
-registers_fetched (void)
+static gdb_byte *
+register_buffer (const struct regcache *regcache, int regnum)
{
- int i;
-
- for (i = 0; i < ARCH_NUM_REGS; i++)
- set_register_cached (i, 1);
- /* Do not assume that the pseudo-regs have also been fetched.
- Fetching all real regs might not account for all pseudo-regs. */
-}
-
-/* read_register_bytes and write_register_bytes are generally a *BAD*
- idea. They are inefficient because they need to check for partial
- updates, which can only be done by scanning through all of the
- registers and seeing if the bytes that are being read/written fall
- inside of an invalid register. [The main reason this is necessary
- is that register sizes can vary, so a simple index won't suffice.]
- It is far better to call read_register_gen and write_register_gen
- if you want to get at the raw register contents, as it only takes a
- regnum as an argument, and therefore can't do a partial register
- update.
-
- Prior to the recent fixes to check for partial updates, both read
- and write_register_bytes always checked to see if any registers
- were stale, and then called target_fetch_registers (-1) to update
- the whole set. This caused really slowed things down for remote
- targets. */
-
-/* Copy INLEN bytes of consecutive data from registers
- starting with the INREGBYTE'th byte of register data
- into memory at MYADDR. */
+ return regcache->registers + regcache->descr->register_offset[regnum];
+}
void
-read_register_bytes (int inregbyte, char *myaddr, int inlen)
+regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read,
+ void *src)
{
- int inregend = inregbyte + inlen;
+ struct gdbarch *gdbarch = dst->descr->gdbarch;
+ gdb_byte buf[MAX_REGISTER_SIZE];
int regnum;
-
- if (registers_pid != inferior_pid)
- {
- registers_changed ();
- registers_pid = inferior_pid;
- }
-
- /* See if we are trying to read bytes from out-of-date registers. If so,
- update just those registers. */
-
- for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++)
+ /* The DST should be `read-only', if it wasn't then the save would
+ end up trying to write the register values back out to the
+ target. */
+ gdb_assert (dst->readonly_p);
+ /* Clear the dest. */
+ memset (dst->registers, 0, dst->descr->sizeof_cooked_registers);
+ memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p);
+ /* Copy over any registers (identified by their membership in the
+ save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs +
+ gdbarch_num_pseudo_regs) range is checked since some architectures need
+ to save/restore `cooked' registers that live in memory. */
+ for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++)
{
- int regstart, regend;
-
- if (register_cached (regnum))
- continue;
-
- if (REGISTER_NAME (regnum) == NULL || *REGISTER_NAME (regnum) == '\0')
- continue;
-
- regstart = REGISTER_BYTE (regnum);
- regend = regstart + REGISTER_RAW_SIZE (regnum);
-
- if (regend <= inregbyte || inregend <= regstart)
- /* The range the user wants to read doesn't overlap with regnum. */
- continue;
-
- /* We've found an uncached register where at least one byte will be read.
- Update it from the target. */
- fetch_register (regnum);
-
- if (!register_cached (regnum))
+ if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup))
{
- /* Sometimes pseudoregs are never marked valid, so that they
- will be fetched every time (it can be complicated to know
- if a pseudoreg is valid, while "fetching" them can be cheap).
- */
- if (regnum < NUM_REGS)
- error ("read_register_bytes: Couldn't update register %d.", regnum);
+ int valid = cooked_read (src, regnum, buf);
+ if (valid)
+ {
+ memcpy (register_buffer (dst, regnum), buf,
+ register_size (gdbarch, regnum));
+ dst->register_valid_p[regnum] = 1;
+ }
}
}
-
- if (myaddr != NULL)
- memcpy (myaddr, register_buffer (-1) + inregbyte, inlen);
}
-/* Read register REGNUM into memory at MYADDR, which must be large
- enough for REGISTER_RAW_BYTES (REGNUM). Target byte-order. If the
- register is known to be the size of a CORE_ADDR or smaller,
- read_register can be used instead. */
-
void
-read_register_gen (int regnum, char *myaddr)
+regcache_restore (struct regcache *dst,
+ regcache_cooked_read_ftype *cooked_read,
+ void *cooked_read_context)
{
- if (registers_pid != inferior_pid)
+ struct gdbarch *gdbarch = dst->descr->gdbarch;
+ gdb_byte buf[MAX_REGISTER_SIZE];
+ int regnum;
+ /* The dst had better not be read-only. If it is, the `restore'
+ doesn't make much sense. */
+ gdb_assert (!dst->readonly_p);
+ /* Copy over any registers, being careful to only restore those that
+ were both saved and need to be restored. The full [0 .. gdbarch_num_regs
+ + gdbarch_num_pseudo_regs) range is checked since some architectures need
+ to save/restore `cooked' registers that live in memory. */
+ for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++)
{
- registers_changed ();
- registers_pid = inferior_pid;
+ if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup))
+ {
+ int valid = cooked_read (cooked_read_context, regnum, buf);
+ if (valid)
+ regcache_cooked_write (dst, regnum, buf);
+ }
}
-
- if (!register_cached (regnum))
- fetch_register (regnum);
-
- memcpy (myaddr, register_buffer (regnum),
- REGISTER_RAW_SIZE (regnum));
}
-/* Write register REGNUM at MYADDR to the target. MYADDR points at
- REGISTER_RAW_BYTES(REGNUM), which must be in target byte-order. */
+static int
+do_cooked_read (void *src, int regnum, gdb_byte *buf)
+{
+ struct regcache *regcache = src;
+ if (!regcache->register_valid_p[regnum] && regcache->readonly_p)
+ /* Don't even think about fetching a register from a read-only
+ cache when the register isn't yet valid. There isn't a target
+ from which the register value can be fetched. */
+ return 0;
+ regcache_cooked_read (regcache, regnum, buf);
+ return 1;
+}
-/* Registers we shouldn't try to store. */
-#if !defined (CANNOT_STORE_REGISTER)
-#define CANNOT_STORE_REGISTER(regnum) 0
-#endif
void
-write_register_gen (int regnum, char *myaddr)
+regcache_cpy (struct regcache *dst, struct regcache *src)
{
- int size;
-
- /* On the sparc, writing %g0 is a no-op, so we don't even want to
- change the registers array if something writes to this register. */
- if (CANNOT_STORE_REGISTER (regnum))
- return;
-
- if (registers_pid != inferior_pid)
- {
- registers_changed ();
- registers_pid = inferior_pid;
- }
-
- size = REGISTER_RAW_SIZE (regnum);
+ int i;
+ gdb_byte *buf;
+ gdb_assert (src != NULL && dst != NULL);
+ gdb_assert (src->descr->gdbarch == dst->descr->gdbarch);
+ gdb_assert (src != dst);
+ gdb_assert (src->readonly_p || dst->readonly_p);
+ if (!src->readonly_p)
+ regcache_save (dst, do_cooked_read, src);
+ else if (!dst->readonly_p)
+ regcache_restore (dst, do_cooked_read, src);
+ else
+ regcache_cpy_no_passthrough (dst, src);
+}
- /* If we have a valid copy of the register, and new value == old value,
- then don't bother doing the actual store. */
+void
+regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src)
+{
+ int i;
+ gdb_assert (src != NULL && dst != NULL);
+ gdb_assert (src->descr->gdbarch == dst->descr->gdbarch);
+ /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough
+ move of data into the current regcache. Doing this would be
+ silly - it would mean that valid_p would be completely invalid. */
+ gdb_assert (dst->readonly_p);
+ memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers);
+ memcpy (dst->register_valid_p, src->register_valid_p,
+ dst->descr->sizeof_raw_register_valid_p);
+}
- if (register_cached (regnum)
- && memcmp (register_buffer (regnum), myaddr, size) == 0)
- return;
+struct regcache *
+regcache_dup (struct regcache *src)
+{
+ struct regcache *newbuf;
+ newbuf = regcache_xmalloc (src->descr->gdbarch);
+ regcache_cpy (newbuf, src);
+ return newbuf;
+}
- if (real_register (regnum))
- target_prepare_to_store ();
+struct regcache *
+regcache_dup_no_passthrough (struct regcache *src)
+{
+ struct regcache *newbuf;
+ newbuf = regcache_xmalloc (src->descr->gdbarch);
+ regcache_cpy_no_passthrough (newbuf, src);
+ return newbuf;
+}
- memcpy (register_buffer (regnum), myaddr, size);
+int
+regcache_valid_p (const struct regcache *regcache, int regnum)
+{
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0);
+ if (regcache->readonly_p)
+ gdb_assert (regnum < regcache->descr->nr_cooked_registers);
+ else
+ gdb_assert (regnum < regcache->descr->nr_raw_registers);
- set_register_cached (regnum, 1);
- store_register (regnum);
+ return regcache->register_valid_p[regnum];
}
-/* Copy INLEN bytes of consecutive data from memory at MYADDR
- into registers starting with the MYREGSTART'th byte of register data. */
-
void
-write_register_bytes (int myregstart, char *myaddr, int inlen)
+regcache_invalidate (struct regcache *regcache, int regnum)
{
- int myregend = myregstart + inlen;
- int regnum;
-
- target_prepare_to_store ();
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0);
+ gdb_assert (!regcache->readonly_p);
+ gdb_assert (regnum < regcache->descr->nr_raw_registers);
+ regcache->register_valid_p[regnum] = 0;
+}
- /* Scan through the registers updating any that are covered by the
- range myregstart<=>myregend using write_register_gen, which does
- nice things like handling threads, and avoiding updates when the
- new and old contents are the same. */
- for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++)
- {
- int regstart, regend;
+/* Global structure containing the current regcache. */
+/* FIXME: cagney/2002-05-11: The two global arrays registers[] and
+ deprecated_register_valid[] currently point into this structure. */
+static struct regcache *current_regcache;
- regstart = REGISTER_BYTE (regnum);
- regend = regstart + REGISTER_RAW_SIZE (regnum);
+/* NOTE: this is a write-through cache. There is no "dirty" bit for
+ recording if the register values have been changed (eg. by the
+ user). Therefore all registers must be written back to the
+ target when appropriate. */
- /* Is this register completely outside the range the user is writing? */
- if (myregend <= regstart || regend <= myregstart)
- /* do nothing */ ;
+struct regcache *get_thread_regcache (ptid_t ptid)
+{
+ /* NOTE: uweigand/2007-05-05: We need to detect the thread's
+ current architecture at this point. */
+ struct gdbarch *thread_gdbarch = current_gdbarch;
- /* Is this register completely within the range the user is writing? */
- else if (myregstart <= regstart && regend <= myregend)
- write_register_gen (regnum, myaddr + (regstart - myregstart));
+ if (current_regcache && ptid_equal (current_regcache->ptid, ptid)
+ && get_regcache_arch (current_regcache) == thread_gdbarch)
+ return current_regcache;
- /* The register partially overlaps the range being written. */
- else
- {
- char *regbuf = (char*) alloca (MAX_REGISTER_RAW_SIZE);
- /* What's the overlap between this register's bytes and
- those the caller wants to write? */
- int overlapstart = max (regstart, myregstart);
- int overlapend = min (regend, myregend);
+ if (current_regcache)
+ regcache_xfree (current_regcache);
- /* We may be doing a partial update of an invalid register.
- Update it from the target before scribbling on it. */
- read_register_gen (regnum, regbuf);
+ current_regcache = regcache_xmalloc (thread_gdbarch);
+ current_regcache->readonly_p = 0;
+ current_regcache->ptid = ptid;
- memcpy (registers + overlapstart,
- myaddr + (overlapstart - myregstart),
- overlapend - overlapstart);
+ return current_regcache;
+}
- store_register (regnum);
- }
- }
+struct regcache *get_current_regcache (void)
+{
+ return get_thread_regcache (inferior_ptid);
}
-/* Return the contents of register REGNUM as an unsigned integer. */
+/* Observer for the target_changed event. */
-ULONGEST
-read_register (int regnum)
+void
+regcache_observer_target_changed (struct target_ops *target)
{
- if (registers_pid != inferior_pid)
- {
- registers_changed ();
- registers_pid = inferior_pid;
- }
-
- if (!register_cached (regnum))
- fetch_register (regnum);
-
- return (extract_unsigned_integer (register_buffer (regnum),
- REGISTER_RAW_SIZE (regnum)));
+ registers_changed ();
}
-ULONGEST
-read_register_pid (int regnum, int pid)
+/* Update global variables old ptids to hold NEW_PTID if they were
+ holding OLD_PTID. */
+static void
+regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid)
{
- int save_pid;
- CORE_ADDR retval;
+ if (current_regcache != NULL
+ && ptid_equal (current_regcache->ptid, old_ptid))
+ current_regcache->ptid = new_ptid;
+}
+
+/* Low level examining and depositing of registers.
- if (pid == inferior_pid)
- return read_register (regnum);
+ The caller is responsible for making sure that the inferior is
+ stopped before calling the fetching routines, or it will get
+ garbage. (a change from GDB version 3, in which the caller got the
+ value from the last stop). */
- save_pid = inferior_pid;
+/* REGISTERS_CHANGED ()
- inferior_pid = pid;
+ Indicate that registers may have changed, so invalidate the cache. */
- retval = read_register (regnum);
+void
+registers_changed (void)
+{
+ int i;
- inferior_pid = save_pid;
+ regcache_xfree (current_regcache);
+ current_regcache = NULL;
- return retval;
+ /* Need to forget about any frames we have cached, too. */
+ reinit_frame_cache ();
+
+ /* Force cleanup of any alloca areas if using C alloca instead of
+ a builtin alloca. This particular call is used to clean up
+ areas allocated by low level target code which may build up
+ during lengthy interactions between gdb and the target before
+ gdb gives control to the user (ie watchpoints). */
+ alloca (0);
}
-/* Return the contents of register REGNUM as a signed integer. */
-LONGEST
-read_signed_register (int regnum)
+void
+regcache_raw_read (struct regcache *regcache, int regnum, gdb_byte *buf)
{
- if (registers_pid != inferior_pid)
+ gdb_assert (regcache != NULL && buf != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
+ /* Make certain that the register cache is up-to-date with respect
+ to the current thread. This switching shouldn't be necessary
+ only there is still only one target side register cache. Sigh!
+ On the bright side, at least there is a regcache object. */
+ if (!regcache->readonly_p)
{
- registers_changed ();
- registers_pid = inferior_pid;
+ if (!regcache_valid_p (regcache, regnum))
+ {
+ struct cleanup *old_chain = save_inferior_ptid ();
+ inferior_ptid = regcache->ptid;
+ target_fetch_registers (regcache, regnum);
+ do_cleanups (old_chain);
+ }
+#if 0
+ /* FIXME: cagney/2004-08-07: At present a number of targets
+ forget (or didn't know that they needed) to set this leading to
+ panics. Also is the problem that targets need to indicate
+ that a register is in one of the possible states: valid,
+ undefined, unknown. The last of which isn't yet
+ possible. */
+ gdb_assert (regcache_valid_p (regcache, regnum));
+#endif
}
+ /* Copy the value directly into the register cache. */
+ memcpy (buf, register_buffer (regcache, regnum),
+ regcache->descr->sizeof_register[regnum]);
+}
- if (!register_cached (regnum))
- fetch_register (regnum);
-
- return (extract_signed_integer (register_buffer (regnum),
- REGISTER_RAW_SIZE (regnum)));
+void
+regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val)
+{
+ gdb_byte *buf;
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ regcache_raw_read (regcache, regnum, buf);
+ (*val) = extract_signed_integer (buf,
+ regcache->descr->sizeof_register[regnum]);
}
-LONGEST
-read_signed_register_pid (int regnum, int pid)
+void
+regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST *val)
{
- int save_pid;
- LONGEST retval;
+ gdb_byte *buf;
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ regcache_raw_read (regcache, regnum, buf);
+ (*val) = extract_unsigned_integer (buf,
+ regcache->descr->sizeof_register[regnum]);
+}
- if (pid == inferior_pid)
- return read_signed_register (regnum);
+void
+regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val)
+{
+ void *buf;
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val);
+ regcache_raw_write (regcache, regnum, buf);
+}
- save_pid = inferior_pid;
+void
+regcache_raw_write_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST val)
+{
+ void *buf;
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val);
+ regcache_raw_write (regcache, regnum, buf);
+}
- inferior_pid = pid;
+void
+regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf)
+{
+ gdb_assert (regnum >= 0);
+ gdb_assert (regnum < regcache->descr->nr_cooked_registers);
+ if (regnum < regcache->descr->nr_raw_registers)
+ regcache_raw_read (regcache, regnum, buf);
+ else if (regcache->readonly_p
+ && regnum < regcache->descr->nr_cooked_registers
+ && regcache->register_valid_p[regnum])
+ /* Read-only register cache, perhaps the cooked value was cached? */
+ memcpy (buf, register_buffer (regcache, regnum),
+ regcache->descr->sizeof_register[regnum]);
+ else
+ gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache,
+ regnum, buf);
+}
- retval = read_signed_register (regnum);
+void
+regcache_cooked_read_signed (struct regcache *regcache, int regnum,
+ LONGEST *val)
+{
+ gdb_byte *buf;
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ regcache_cooked_read (regcache, regnum, buf);
+ (*val) = extract_signed_integer (buf,
+ regcache->descr->sizeof_register[regnum]);
+}
- inferior_pid = save_pid;
+void
+regcache_cooked_read_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST *val)
+{
+ gdb_byte *buf;
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ regcache_cooked_read (regcache, regnum, buf);
+ (*val) = extract_unsigned_integer (buf,
+ regcache->descr->sizeof_register[regnum]);
+}
- return retval;
+void
+regcache_cooked_write_signed (struct regcache *regcache, int regnum,
+ LONGEST val)
+{
+ void *buf;
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ store_signed_integer (buf, regcache->descr->sizeof_register[regnum], val);
+ regcache_cooked_write (regcache, regnum, buf);
}
-/* Store VALUE into the raw contents of register number REGNUM. */
+void
+regcache_cooked_write_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST val)
+{
+ void *buf;
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], val);
+ regcache_cooked_write (regcache, regnum, buf);
+}
void
-write_register (int regnum, LONGEST val)
+regcache_raw_write (struct regcache *regcache, int regnum,
+ const gdb_byte *buf)
{
- PTR buf;
- int size;
+ struct cleanup *old_chain;
+
+ gdb_assert (regcache != NULL && buf != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
+ gdb_assert (!regcache->readonly_p);
/* On the sparc, writing %g0 is a no-op, so we don't even want to
change the registers array if something writes to this register. */
- if (CANNOT_STORE_REGISTER (regnum))
+ if (gdbarch_cannot_store_register (get_regcache_arch (regcache), regnum))
return;
- if (registers_pid != inferior_pid)
- {
- registers_changed ();
- registers_pid = inferior_pid;
- }
-
- size = REGISTER_RAW_SIZE (regnum);
- buf = alloca (size);
- store_signed_integer (buf, size, (LONGEST) val);
-
- /* If we have a valid copy of the register, and new value == old value,
- then don't bother doing the actual store. */
-
- if (register_cached (regnum)
- && memcmp (register_buffer (regnum), buf, size) == 0)
+ /* If we have a valid copy of the register, and new value == old
+ value, then don't bother doing the actual store. */
+ if (regcache_valid_p (regcache, regnum)
+ && (memcmp (register_buffer (regcache, regnum), buf,
+ regcache->descr->sizeof_register[regnum]) == 0))
return;
- if (real_register (regnum))
- target_prepare_to_store ();
+ old_chain = save_inferior_ptid ();
+ inferior_ptid = regcache->ptid;
- memcpy (register_buffer (regnum), buf, size);
+ target_prepare_to_store (regcache);
+ memcpy (register_buffer (regcache, regnum), buf,
+ regcache->descr->sizeof_register[regnum]);
+ regcache->register_valid_p[regnum] = 1;
+ target_store_registers (regcache, regnum);
- set_register_cached (regnum, 1);
- store_register (regnum);
+ do_cleanups (old_chain);
}
void
-write_register_pid (int regnum, CORE_ADDR val, int pid)
+regcache_cooked_write (struct regcache *regcache, int regnum,
+ const gdb_byte *buf)
{
- int save_pid;
+ gdb_assert (regnum >= 0);
+ gdb_assert (regnum < regcache->descr->nr_cooked_registers);
+ if (regnum < regcache->descr->nr_raw_registers)
+ regcache_raw_write (regcache, regnum, buf);
+ else
+ gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache,
+ regnum, buf);
+}
- if (pid == inferior_pid)
- {
- write_register (regnum, val);
- return;
- }
+/* Perform a partial register transfer using a read, modify, write
+ operation. */
- save_pid = inferior_pid;
+typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum,
+ void *buf);
+typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum,
+ const void *buf);
- inferior_pid = pid;
+static void
+regcache_xfer_part (struct regcache *regcache, int regnum,
+ int offset, int len, void *in, const void *out,
+ void (*read) (struct regcache *regcache, int regnum,
+ gdb_byte *buf),
+ void (*write) (struct regcache *regcache, int regnum,
+ const gdb_byte *buf))
+{
+ struct regcache_descr *descr = regcache->descr;
+ gdb_byte reg[MAX_REGISTER_SIZE];
+ gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]);
+ gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]);
+ /* Something to do? */
+ if (offset + len == 0)
+ return;
+ /* Read (when needed) ... */
+ if (in != NULL
+ || offset > 0
+ || offset + len < descr->sizeof_register[regnum])
+ {
+ gdb_assert (read != NULL);
+ read (regcache, regnum, reg);
+ }
+ /* ... modify ... */
+ if (in != NULL)
+ memcpy (in, reg + offset, len);
+ if (out != NULL)
+ memcpy (reg + offset, out, len);
+ /* ... write (when needed). */
+ if (out != NULL)
+ {
+ gdb_assert (write != NULL);
+ write (regcache, regnum, reg);
+ }
+}
- write_register (regnum, val);
+void
+regcache_raw_read_part (struct regcache *regcache, int regnum,
+ int offset, int len, gdb_byte *buf)
+{
+ struct regcache_descr *descr = regcache->descr;
+ gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers);
+ regcache_xfer_part (regcache, regnum, offset, len, buf, NULL,
+ regcache_raw_read, regcache_raw_write);
+}
- inferior_pid = save_pid;
+void
+regcache_raw_write_part (struct regcache *regcache, int regnum,
+ int offset, int len, const gdb_byte *buf)
+{
+ struct regcache_descr *descr = regcache->descr;
+ gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers);
+ regcache_xfer_part (regcache, regnum, offset, len, NULL, buf,
+ regcache_raw_read, regcache_raw_write);
}
-/* SUPPLY_REGISTER()
+void
+regcache_cooked_read_part (struct regcache *regcache, int regnum,
+ int offset, int len, gdb_byte *buf)
+{
+ struct regcache_descr *descr = regcache->descr;
+ gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers);
+ regcache_xfer_part (regcache, regnum, offset, len, buf, NULL,
+ regcache_cooked_read, regcache_cooked_write);
+}
- Record that register REGNUM contains VAL. This is used when the
- value is obtained from the inferior or core dump, so there is no
- need to store the value there.
+void
+regcache_cooked_write_part (struct regcache *regcache, int regnum,
+ int offset, int len, const gdb_byte *buf)
+{
+ struct regcache_descr *descr = regcache->descr;
+ gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers);
+ regcache_xfer_part (regcache, regnum, offset, len, NULL, buf,
+ regcache_cooked_read, regcache_cooked_write);
+}
- If VAL is a NULL pointer, then it's probably an unsupported register.
- We just set its value to all zeros. We might want to record this
- fact, and report it to the users of read_register and friends. */
+/* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */
void
-supply_register (int regnum, char *val)
+regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf)
{
-#if 1
- if (registers_pid != inferior_pid)
- {
- registers_changed ();
- registers_pid = inferior_pid;
- }
-#endif
+ void *regbuf;
+ size_t size;
- set_register_cached (regnum, 1);
- if (val)
- memcpy (register_buffer (regnum), val,
- REGISTER_RAW_SIZE (regnum));
- else
- memset (register_buffer (regnum), '\000',
- REGISTER_RAW_SIZE (regnum));
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
+ gdb_assert (!regcache->readonly_p);
- /* On some architectures, e.g. HPPA, there are a few stray bits in
- some registers, that the rest of the code would like to ignore. */
+ regbuf = register_buffer (regcache, regnum);
+ size = regcache->descr->sizeof_register[regnum];
-#ifdef CLEAN_UP_REGISTER_VALUE
- CLEAN_UP_REGISTER_VALUE (regnum, register_buffer (regnum));
-#endif
-}
+ if (buf)
+ memcpy (regbuf, buf, size);
+ else
+ memset (regbuf, 0, size);
-/* read_pc, write_pc, read_sp, write_sp, read_fp, write_fp, etc.
- Special handling for registers PC, SP, and FP. */
+ /* Mark the register as cached. */
+ regcache->register_valid_p[regnum] = 1;
+}
-/* This routine is getting awfully cluttered with #if's. It's probably
- time to turn this into READ_PC and define it in the tm.h file.
- Ditto for write_pc.
+/* Collect register REGNUM from REGCACHE and store its contents in BUF. */
- 1999-06-08: The following were re-written so that it assumes the
- existence of a TARGET_READ_PC et.al. macro. A default generic
- version of that macro is made available where needed.
+void
+regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf)
+{
+ const void *regbuf;
+ size_t size;
- Since the ``TARGET_READ_PC'' et.al. macro is going to be controlled
- by the multi-arch framework, it will eventually be possible to
- eliminate the intermediate read_pc_pid(). The client would call
- TARGET_READ_PC directly. (cagney). */
+ gdb_assert (regcache != NULL && buf != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
-CORE_ADDR
-generic_target_read_pc (int pid)
-{
-#ifdef PC_REGNUM
- if (PC_REGNUM >= 0)
- {
- CORE_ADDR pc_val = ADDR_BITS_REMOVE ((CORE_ADDR) read_register_pid (PC_REGNUM, pid));
- return pc_val;
- }
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_read_pc");
- return 0;
+ regbuf = register_buffer (regcache, regnum);
+ size = regcache->descr->sizeof_register[regnum];
+ memcpy (buf, regbuf, size);
}
+
+/* Special handling for register PC. */
+
CORE_ADDR
-read_pc_pid (int pid)
+regcache_read_pc (struct regcache *regcache)
{
- int saved_inferior_pid;
- CORE_ADDR pc_val;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
- /* In case pid != inferior_pid. */
- saved_inferior_pid = inferior_pid;
- inferior_pid = pid;
-
- pc_val = TARGET_READ_PC (pid);
+ CORE_ADDR pc_val;
- inferior_pid = saved_inferior_pid;
+ if (gdbarch_read_pc_p (gdbarch))
+ pc_val = gdbarch_read_pc (gdbarch, regcache);
+ /* Else use per-frame method on get_current_frame. */
+ else if (gdbarch_pc_regnum (gdbarch) >= 0)
+ {
+ ULONGEST raw_val;
+ regcache_cooked_read_unsigned (regcache,
+ gdbarch_pc_regnum (gdbarch),
+ &raw_val);
+ pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val);
+ }
+ else
+ internal_error (__FILE__, __LINE__,
+ _("regcache_read_pc: Unable to find PC"));
return pc_val;
}
CORE_ADDR
read_pc (void)
{
- return read_pc_pid (inferior_pid);
+ return regcache_read_pc (get_current_regcache ());
}
void
-generic_target_write_pc (CORE_ADDR pc, int pid)
-{
-#ifdef PC_REGNUM
- if (PC_REGNUM >= 0)
- write_register_pid (PC_REGNUM, pc, pid);
- if (NPC_REGNUM >= 0)
- write_register_pid (NPC_REGNUM, pc + 4, pid);
- if (NNPC_REGNUM >= 0)
- write_register_pid (NNPC_REGNUM, pc + 8, pid);
-#else
- internal_error (__FILE__, __LINE__,
- "generic_target_write_pc");
-#endif
-}
-
-void
-write_pc_pid (CORE_ADDR pc, int pid)
+regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
- int saved_inferior_pid;
-
- /* In case pid != inferior_pid. */
- saved_inferior_pid = inferior_pid;
- inferior_pid = pid;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
- TARGET_WRITE_PC (pc, pid);
-
- inferior_pid = saved_inferior_pid;
+ if (gdbarch_write_pc_p (gdbarch))
+ gdbarch_write_pc (gdbarch, regcache, pc);
+ else if (gdbarch_pc_regnum (gdbarch) >= 0)
+ regcache_cooked_write_unsigned (regcache,
+ gdbarch_pc_regnum (gdbarch), pc);
+ else
+ internal_error (__FILE__, __LINE__,
+ _("regcache_write_pc: Unable to update PC"));
}
void
write_pc (CORE_ADDR pc)
{
- write_pc_pid (pc, inferior_pid);
+ regcache_write_pc (get_current_regcache (), pc);
}
-/* Cope with strage ways of getting to the stack and frame pointers */
-CORE_ADDR
-generic_target_read_sp (void)
-{
-#ifdef SP_REGNUM
- if (SP_REGNUM >= 0)
- return read_register (SP_REGNUM);
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_read_sp");
-}
-
-CORE_ADDR
-read_sp (void)
+static void
+reg_flush_command (char *command, int from_tty)
{
- return TARGET_READ_SP ();
+ /* Force-flush the register cache. */
+ registers_changed ();
+ if (from_tty)
+ printf_filtered (_("Register cache flushed.\n"));
}
-void
-generic_target_write_sp (CORE_ADDR val)
+static void
+dump_endian_bytes (struct ui_file *file, enum bfd_endian endian,
+ const unsigned char *buf, long len)
{
-#ifdef SP_REGNUM
- if (SP_REGNUM >= 0)
+ int i;
+ switch (endian)
{
- write_register (SP_REGNUM, val);
- return;
+ case BFD_ENDIAN_BIG:
+ for (i = 0; i < len; i++)
+ fprintf_unfiltered (file, "%02x", buf[i]);
+ break;
+ case BFD_ENDIAN_LITTLE:
+ for (i = len - 1; i >= 0; i--)
+ fprintf_unfiltered (file, "%02x", buf[i]);
+ break;
+ default:
+ internal_error (__FILE__, __LINE__, _("Bad switch"));
}
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_write_sp");
}
-void
-write_sp (CORE_ADDR val)
+enum regcache_dump_what
{
- TARGET_WRITE_SP (val);
-}
+ regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups
+};
-CORE_ADDR
-generic_target_read_fp (void)
+static void
+regcache_dump (struct regcache *regcache, struct ui_file *file,
+ enum regcache_dump_what what_to_dump)
{
-#ifdef FP_REGNUM
- if (FP_REGNUM >= 0)
- return read_register (FP_REGNUM);
+ struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
+ struct gdbarch *gdbarch = regcache->descr->gdbarch;
+ int regnum;
+ int footnote_nr = 0;
+ int footnote_register_size = 0;
+ int footnote_register_offset = 0;
+ int footnote_register_type_name_null = 0;
+ long register_offset = 0;
+ unsigned char buf[MAX_REGISTER_SIZE];
+
+#if 0
+ fprintf_unfiltered (file, "nr_raw_registers %d\n",
+ regcache->descr->nr_raw_registers);
+ fprintf_unfiltered (file, "nr_cooked_registers %d\n",
+ regcache->descr->nr_cooked_registers);
+ fprintf_unfiltered (file, "sizeof_raw_registers %ld\n",
+ regcache->descr->sizeof_raw_registers);
+ fprintf_unfiltered (file, "sizeof_raw_register_valid_p %ld\n",
+ regcache->descr->sizeof_raw_register_valid_p);
+ fprintf_unfiltered (file, "gdbarch_num_regs %d\n",
+ gdbarch_num_regs (gdbarch));
+ fprintf_unfiltered (file, "gdbarch_num_pseudo_regs %d\n",
+ gdbarch_num_pseudo_regs (gdbarch));
#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_read_fp");
-}
-CORE_ADDR
-read_fp (void)
-{
- return TARGET_READ_FP ();
+ gdb_assert (regcache->descr->nr_cooked_registers
+ == (gdbarch_num_regs (gdbarch)
+ + gdbarch_num_pseudo_regs (gdbarch)));
+
+ for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++)
+ {
+ /* Name. */
+ if (regnum < 0)
+ fprintf_unfiltered (file, " %-10s", "Name");
+ else
+ {
+ const char *p = gdbarch_register_name (gdbarch, regnum);
+ if (p == NULL)
+ p = "";
+ else if (p[0] == '\0')
+ p = "''";
+ fprintf_unfiltered (file, " %-10s", p);
+ }
+
+ /* Number. */
+ if (regnum < 0)
+ fprintf_unfiltered (file, " %4s", "Nr");
+ else
+ fprintf_unfiltered (file, " %4d", regnum);
+
+ /* Relative number. */
+ if (regnum < 0)
+ fprintf_unfiltered (file, " %4s", "Rel");
+ else if (regnum < gdbarch_num_regs (gdbarch))
+ fprintf_unfiltered (file, " %4d", regnum);
+ else
+ fprintf_unfiltered (file, " %4d",
+ (regnum - gdbarch_num_regs (gdbarch)));
+
+ /* Offset. */
+ if (regnum < 0)
+ fprintf_unfiltered (file, " %6s ", "Offset");
+ else
+ {
+ fprintf_unfiltered (file, " %6ld",
+ regcache->descr->register_offset[regnum]);
+ if (register_offset != regcache->descr->register_offset[regnum]
+ || (regnum > 0
+ && (regcache->descr->register_offset[regnum]
+ != (regcache->descr->register_offset[regnum - 1]
+ + regcache->descr->sizeof_register[regnum - 1])))
+ )
+ {
+ if (!footnote_register_offset)
+ footnote_register_offset = ++footnote_nr;
+ fprintf_unfiltered (file, "*%d", footnote_register_offset);
+ }
+ else
+ fprintf_unfiltered (file, " ");
+ register_offset = (regcache->descr->register_offset[regnum]
+ + regcache->descr->sizeof_register[regnum]);
+ }
+
+ /* Size. */
+ if (regnum < 0)
+ fprintf_unfiltered (file, " %5s ", "Size");
+ else
+ fprintf_unfiltered (file, " %5ld",
+ regcache->descr->sizeof_register[regnum]);
+
+ /* Type. */
+ {
+ const char *t;
+ if (regnum < 0)
+ t = "Type";
+ else
+ {
+ static const char blt[] = "builtin_type";
+ t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum));
+ if (t == NULL)
+ {
+ char *n;
+ if (!footnote_register_type_name_null)
+ footnote_register_type_name_null = ++footnote_nr;
+ n = xstrprintf ("*%d", footnote_register_type_name_null);
+ make_cleanup (xfree, n);
+ t = n;
+ }
+ /* Chop a leading builtin_type. */
+ if (strncmp (t, blt, strlen (blt)) == 0)
+ t += strlen (blt);
+ }
+ fprintf_unfiltered (file, " %-15s", t);
+ }
+
+ /* Leading space always present. */
+ fprintf_unfiltered (file, " ");
+
+ /* Value, raw. */
+ if (what_to_dump == regcache_dump_raw)
+ {
+ if (regnum < 0)
+ fprintf_unfiltered (file, "Raw value");
+ else if (regnum >= regcache->descr->nr_raw_registers)
+ fprintf_unfiltered (file, "<cooked>");
+ else if (!regcache_valid_p (regcache, regnum))
+ fprintf_unfiltered (file, "<invalid>");
+ else
+ {
+ regcache_raw_read (regcache, regnum, buf);
+ fprintf_unfiltered (file, "0x");
+ dump_endian_bytes (file,
+ gdbarch_byte_order (gdbarch), buf,
+ regcache->descr->sizeof_register[regnum]);
+ }
+ }
+
+ /* Value, cooked. */
+ if (what_to_dump == regcache_dump_cooked)
+ {
+ if (regnum < 0)
+ fprintf_unfiltered (file, "Cooked value");
+ else
+ {
+ regcache_cooked_read (regcache, regnum, buf);
+ fprintf_unfiltered (file, "0x");
+ dump_endian_bytes (file,
+ gdbarch_byte_order (gdbarch), buf,
+ regcache->descr->sizeof_register[regnum]);
+ }
+ }
+
+ /* Group members. */
+ if (what_to_dump == regcache_dump_groups)
+ {
+ if (regnum < 0)
+ fprintf_unfiltered (file, "Groups");
+ else
+ {
+ const char *sep = "";
+ struct reggroup *group;
+ for (group = reggroup_next (gdbarch, NULL);
+ group != NULL;
+ group = reggroup_next (gdbarch, group))
+ {
+ if (gdbarch_register_reggroup_p (gdbarch, regnum, group))
+ {
+ fprintf_unfiltered (file, "%s%s", sep, reggroup_name (group));
+ sep = ",";
+ }
+ }
+ }
+ }
+
+ fprintf_unfiltered (file, "\n");
+ }
+
+ if (footnote_register_size)
+ fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n",
+ footnote_register_size);
+ if (footnote_register_offset)
+ fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n",
+ footnote_register_offset);
+ if (footnote_register_type_name_null)
+ fprintf_unfiltered (file,
+ "*%d: Register type's name NULL.\n",
+ footnote_register_type_name_null);
+ do_cleanups (cleanups);
}
-void
-generic_target_write_fp (CORE_ADDR val)
+static void
+regcache_print (char *args, enum regcache_dump_what what_to_dump)
{
-#ifdef FP_REGNUM
- if (FP_REGNUM >= 0)
+ if (args == NULL)
+ regcache_dump (get_current_regcache (), gdb_stdout, what_to_dump);
+ else
{
- write_register (FP_REGNUM, val);
- return;
+ struct cleanup *cleanups;
+ struct ui_file *file = gdb_fopen (args, "w");
+ if (file == NULL)
+ perror_with_name (_("maintenance print architecture"));
+ cleanups = make_cleanup_ui_file_delete (file);
+ regcache_dump (get_current_regcache (), file, what_to_dump);
+ do_cleanups (cleanups);
}
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_write_fp");
}
-void
-write_fp (CORE_ADDR val)
+static void
+maintenance_print_registers (char *args, int from_tty)
{
- TARGET_WRITE_FP (val);
+ regcache_print (args, regcache_dump_none);
}
-/* ARGSUSED */
static void
-reg_flush_command (char *command, int from_tty)
+maintenance_print_raw_registers (char *args, int from_tty)
{
- /* Force-flush the register cache. */
- registers_changed ();
- if (from_tty)
- printf_filtered ("Register cache flushed.\n");
+ regcache_print (args, regcache_dump_raw);
}
+static void
+maintenance_print_cooked_registers (char *args, int from_tty)
+{
+ regcache_print (args, regcache_dump_cooked);
+}
static void
-build_regcache (void)
+maintenance_print_register_groups (char *args, int from_tty)
{
- /* We allocate some extra slop since we do a lot of memcpy's around
- `registers', and failing-soft is better than failing hard. */
- int sizeof_registers = REGISTER_BYTES + /* SLOP */ 256;
- int sizeof_register_valid =
- (NUM_REGS + NUM_PSEUDO_REGS) * sizeof (*register_valid);
- registers = xmalloc (sizeof_registers);
- memset (registers, 0, sizeof_registers);
- register_valid = xmalloc (sizeof_register_valid);
- memset (register_valid, 0, sizeof_register_valid);
+ regcache_print (args, regcache_dump_groups);
}
+extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */
+
void
_initialize_regcache (void)
{
- build_regcache ();
+ regcache_descr_handle = gdbarch_data_register_post_init (init_regcache_descr);
- register_gdbarch_swap (®isters, sizeof (registers), NULL);
- register_gdbarch_swap (®ister_valid, sizeof (register_valid), NULL);
- register_gdbarch_swap (NULL, 0, build_regcache);
+ observer_attach_target_changed (regcache_observer_target_changed);
+ observer_attach_thread_ptid_changed (regcache_thread_ptid_changed);
add_com ("flushregs", class_maintenance, reg_flush_command,
- "Force gdb to flush its register cache (maintainer command)");
+ _("Force gdb to flush its register cache (maintainer command)"));
+
+ add_cmd ("registers", class_maintenance, maintenance_print_registers, _("\
+Print the internal register configuration.\n\
+Takes an optional file parameter."), &maintenanceprintlist);
+ add_cmd ("raw-registers", class_maintenance,
+ maintenance_print_raw_registers, _("\
+Print the internal register configuration including raw values.\n\
+Takes an optional file parameter."), &maintenanceprintlist);
+ add_cmd ("cooked-registers", class_maintenance,
+ maintenance_print_cooked_registers, _("\
+Print the internal register configuration including cooked values.\n\
+Takes an optional file parameter."), &maintenanceprintlist);
+ add_cmd ("register-groups", class_maintenance,
+ maintenance_print_register_groups, _("\
+Print the internal register configuration including each register's group.\n\
+Takes an optional file parameter."),
+ &maintenanceprintlist);
+
}
projects / deliverable / binutils-gdb.git / blobdiff