/* 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 (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 "inferior.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. */
+/* Per-architecture object describing the layout of a register cache.
+ Computed once when the architecture is created */
-/* REGISTERS contains the cached register values (in target byte order). */
+struct gdbarch_data *regcache_descr_handle;
-char *registers;
+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)
+{
+ 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;
+}
-/* 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. */
+static struct regcache_descr *
+regcache_descr (struct gdbarch *gdbarch)
+{
+ return gdbarch_data (gdbarch, regcache_descr_handle);
+}
-signed char *register_valid;
+/* Utility functions returning useful register attributes stored in
+ the regcache descr. */
-/* The thread/process associated with the current set of registers. */
+struct type *
+register_type (struct gdbarch *gdbarch, int regnum)
+{
+ struct regcache_descr *descr = regcache_descr (gdbarch);
+ gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers);
+ return descr->register_type[regnum];
+}
-static ptid_t registers_ptid;
+/* Utility functions returning useful register attributes stored in
+ the regcache descr. */
-/*
- * FUNCTIONS:
- */
+int
+register_size (struct gdbarch *gdbarch, int 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;
+}
-/* REGISTER_CACHED()
+/* The register cache for storing raw register values. */
- 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 regcache
+{
+ 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;
+}
-int
-register_cached (int regnum)
+void
+regcache_xfree (struct regcache *regcache)
{
- return register_valid[regnum];
+ if (regcache == NULL)
+ return;
+ xfree (regcache->registers);
+ xfree (regcache->register_valid_p);
+ xfree (regcache);
}
-/* 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. */
+static void
+do_regcache_xfree (void *data)
+{
+ regcache_xfree (data);
+}
-void
-set_register_cached (int regnum, int state)
+struct cleanup *
+make_cleanup_regcache_xfree (struct regcache *regcache)
{
- register_valid[regnum] = state;
+ return make_cleanup (do_regcache_xfree, regcache);
}
-/* REGISTER_CHANGED
+/* Return REGCACHE's architecture. */
- invalidate a single register REGNUM in the cache */
-void
-register_changed (int regnum)
+struct gdbarch *
+get_regcache_arch (const struct regcache *regcache)
{
- set_register_cached (regnum, 0);
+ return regcache->descr->gdbarch;
}
-/* If REGNUM >= 0, return a pointer to register REGNUM's cache buffer area,
- else return a pointer to the start of the cache buffer. */
+/* Return a pointer to register REGNUM's buffer cache. */
-static char *
-register_buffer (int regnum)
+static gdb_byte *
+register_buffer (const struct regcache *regcache, int regnum)
{
- gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS));
- return ®isters[REGISTER_BYTE (regnum)];
+ return regcache->registers + regcache->descr->register_offset[regnum];
}
-/* Return whether register REGNUM is a real register. */
+void
+regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read,
+ void *src)
+{
+ struct gdbarch *gdbarch = dst->descr->gdbarch;
+ gdb_byte buf[MAX_REGISTER_SIZE];
+ int 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++)
+ {
+ if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup))
+ {
+ 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;
+ }
+ }
+ }
+}
+
+void
+regcache_restore (struct regcache *dst,
+ regcache_cooked_read_ftype *cooked_read,
+ void *cooked_read_context)
+{
+ 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++)
+ {
+ 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);
+ }
+ }
+}
static int
-real_register (int regnum)
+do_cooked_read (void *src, int regnum, gdb_byte *buf)
{
- return regnum >= 0 && regnum < NUM_REGS;
+ 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;
}
-/* Return whether register REGNUM is a pseudo register. */
-static int
-pseudo_register (int regnum)
+void
+regcache_cpy (struct regcache *dst, struct regcache *src)
{
- return regnum >= NUM_REGS && regnum < NUM_REGS + NUM_PSEUDO_REGS;
+ 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);
}
-/* Fetch register REGNUM into the cache. */
+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);
+}
-static void
-fetch_register (int regnum)
-{
- /* NOTE: cagney/2001-12-04: Legacy targets were using fetch/store
- pseudo-register as a way of handling registers that needed to be
- constructed from one or more raw registers. New targets instead
- use gdbarch register read/write. */
- if (FETCH_PSEUDO_REGISTER_P ()
- && pseudo_register (regnum))
- FETCH_PSEUDO_REGISTER (regnum);
+struct regcache *
+regcache_dup (struct regcache *src)
+{
+ struct regcache *newbuf;
+ newbuf = regcache_xmalloc (src->descr->gdbarch);
+ regcache_cpy (newbuf, src);
+ return newbuf;
+}
+
+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;
+}
+
+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
- target_fetch_registers (regnum);
+ gdb_assert (regnum < regcache->descr->nr_raw_registers);
+
+ return regcache->register_valid_p[regnum];
+}
+
+void
+regcache_invalidate (struct regcache *regcache, int regnum)
+{
+ 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;
}
-/* Write register REGNUM cached value to the target. */
+/* 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;
+
+/* 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. */
+
+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;
+
+ if (current_regcache && ptid_equal (current_regcache->ptid, ptid)
+ && get_regcache_arch (current_regcache) == thread_gdbarch)
+ return current_regcache;
+
+ if (current_regcache)
+ regcache_xfree (current_regcache);
+
+ current_regcache = regcache_xmalloc (thread_gdbarch);
+ current_regcache->readonly_p = 0;
+ current_regcache->ptid = ptid;
+
+ return current_regcache;
+}
+
+struct regcache *get_current_regcache (void)
+{
+ return get_thread_regcache (inferior_ptid);
+}
+
+
+/* Observer for the target_changed event. */
+
+void
+regcache_observer_target_changed (struct target_ops *target)
+{
+ registers_changed ();
+}
+
+/* Update global variables old ptids to hold NEW_PTID if they were
+ holding OLD_PTID. */
static void
-store_register (int regnum)
-{
- /* NOTE: cagney/2001-12-04: Legacy targets were using fetch/store
- pseudo-register as a way of handling registers that needed to be
- constructed from one or more raw registers. New targets instead
- use gdbarch register read/write. */
- if (STORE_PSEUDO_REGISTER_P ()
- && pseudo_register (regnum))
- STORE_PSEUDO_REGISTER (regnum);
- else
- target_store_registers (regnum);
+regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid)
+{
+ if (current_regcache != NULL
+ && ptid_equal (current_regcache->ptid, old_ptid))
+ current_regcache->ptid = new_ptid;
}
/* Low level examining and depositing of registers.
{
int i;
- registers_ptid = pid_to_ptid (-1);
+ regcache_xfree (current_regcache);
+ current_regcache = NULL;
+
+ /* 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
during lengthy interactions between gdb and the target before
gdb gives control to the user (ie watchpoints). */
alloca (0);
-
- for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
- set_register_cached (i, 0);
-
- if (registers_changed_hook)
- registers_changed_hook ();
}
-/* REGISTERS_FETCHED ()
-
- Indicate that all registers have been fetched, so mark them all valid. */
-
-/* NOTE: cagney/2001-12-04: This function does not set valid on the
- pseudo-register range since pseudo registers are always supplied
- using supply_register(). */
-/* FIXME: cagney/2001-12-04: This function is DEPRECATED. The target
- code was blatting the registers[] array and then calling this.
- Since targets should only be using supply_register() the need for
- this function/hack is eliminated. */
-
-void
-registers_fetched (void)
-{
- int i;
-
- for (i = 0; i < NUM_REGS; i++)
- set_register_cached (i, 1);
- /* Do not assume that the pseudo-regs have also been fetched.
- Fetching all real regs NEVER accounts for 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. */
void
-read_register_bytes (int in_start, char *in_buf, int in_len)
+regcache_raw_read (struct regcache *regcache, int regnum, gdb_byte *buf)
{
- int in_end = in_start + in_len;
- int regnum;
- char *reg_buf = alloca (MAX_REGISTER_RAW_SIZE);
-
- /* 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++)
+ 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)
{
- int reg_start;
- int reg_end;
- int reg_len;
- int start;
- int end;
- int byte;
-
- reg_start = REGISTER_BYTE (regnum);
- reg_len = REGISTER_RAW_SIZE (regnum);
- reg_end = reg_start + reg_len;
-
- if (reg_end <= in_start || in_end <= reg_start)
- /* The range the user wants to read doesn't overlap with regnum. */
- continue;
-
- if (REGISTER_NAME (regnum) != NULL && *REGISTER_NAME (regnum) != '\0')
- /* Force the cache to fetch the entire register. */
- read_register_gen (regnum, reg_buf);
- else
- /* Legacy note: even though this register is ``invalid'' we
- still need to return something. It would appear that some
- code relies on apparent gaps in the register array also
- being returned. */
- /* FIXME: cagney/2001-08-18: This is just silly. It defeats
- the entire register read/write flow of control. Must
- resist temptation to return 0xdeadbeef. */
- memcpy (reg_buf, registers + reg_start, reg_len);
-
- /* Legacy note: This function, for some reason, allows a NULL
- input buffer. If the buffer is NULL, the registers are still
- fetched, just the final transfer is skipped. */
- if (in_buf == NULL)
- continue;
-
- /* start = max (reg_start, in_start) */
- if (reg_start > in_start)
- start = reg_start;
- else
- start = in_start;
-
- /* end = min (reg_end, in_end) */
- if (reg_end < in_end)
- end = reg_end;
- else
- end = in_end;
-
- /* Transfer just the bytes common to both IN_BUF and REG_BUF */
- for (byte = start; byte < end; byte++)
+ if (!regcache_valid_p (regcache, regnum))
{
- in_buf[byte - in_start] = reg_buf[byte - reg_start];
+ 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]);
}
-/* 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. */
-
-static void
-legacy_read_register_gen (int regnum, char *myaddr)
+void
+regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val)
{
- gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS));
- if (! ptid_equal (registers_ptid, inferior_ptid))
- {
- registers_changed ();
- registers_ptid = inferior_ptid;
- }
-
- if (!register_cached (regnum))
- fetch_register (regnum);
-
- memcpy (myaddr, register_buffer (regnum),
- REGISTER_RAW_SIZE (regnum));
+ 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]);
}
void
-regcache_read (int rawnum, char *buf)
+regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST *val)
{
- gdb_assert (rawnum >= 0 && rawnum < (NUM_REGS + NUM_PSEUDO_REGS));
- /* For moment, just use underlying legacy code. Ulgh!!! */
- legacy_read_register_gen (rawnum, buf);
+ 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]);
}
void
-read_register_gen (int regnum, char *buf)
+regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val)
{
- if (! gdbarch_register_read_p (current_gdbarch))
- {
- legacy_read_register_gen (regnum, buf);
- return;
- }
- gdbarch_register_read (current_gdbarch, regnum, buf);
+ 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);
}
-
-/* Write register REGNUM at MYADDR to the target. MYADDR points at
- REGISTER_RAW_BYTES(REGNUM), which must be in target byte-order. */
-
-static void
-legacy_write_register_gen (int regnum, char *myaddr)
+void
+regcache_raw_write_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST val)
{
- int size;
- gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS));
-
- /* 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 (! ptid_equal (registers_ptid, inferior_ptid))
- {
- registers_changed ();
- registers_ptid = inferior_ptid;
- }
-
- size = REGISTER_RAW_SIZE (regnum);
-
- if (real_register (regnum))
- {
- /* 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), myaddr, size) == 0)
- return;
- else
- target_prepare_to_store ();
- }
-
- memcpy (register_buffer (regnum), myaddr, size);
-
- set_register_cached (regnum, 1);
- store_register (regnum);
+ 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);
}
void
-regcache_write (int rawnum, char *buf)
+regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf)
{
- gdb_assert (rawnum >= 0 && rawnum < (NUM_REGS + NUM_PSEUDO_REGS));
- /* For moment, just use underlying legacy code. Ulgh!!! */
- legacy_write_register_gen (rawnum, 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);
}
void
-write_register_gen (int regnum, char *buf)
+regcache_cooked_read_signed (struct regcache *regcache, int regnum,
+ LONGEST *val)
{
- if (! gdbarch_register_write_p (current_gdbarch))
- {
- legacy_write_register_gen (regnum, buf);
- return;
- }
- gdbarch_register_write (current_gdbarch, regnum, buf);
+ 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]);
}
-/* 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_cooked_read_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST *val)
{
- int myregend = myregstart + inlen;
- int regnum;
-
- target_prepare_to_store ();
-
- /* 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;
-
- regstart = REGISTER_BYTE (regnum);
- regend = regstart + REGISTER_RAW_SIZE (regnum);
-
- /* Is this register completely outside the range the user is writing? */
- if (myregend <= regstart || regend <= myregstart)
- /* do nothing */ ;
-
- /* Is this register completely within the range the user is writing? */
- else if (myregstart <= regstart && regend <= myregend)
- write_register_gen (regnum, myaddr + (regstart - myregstart));
-
- /* 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);
-
- /* 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);
-
- memcpy (registers + overlapstart,
- myaddr + (overlapstart - myregstart),
- overlapend - overlapstart);
-
- store_register (regnum);
- }
- }
+ 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]);
}
+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);
+}
-/* Return the contents of register REGNUM as an unsigned integer. */
-
-ULONGEST
-read_register (int regnum)
+void
+regcache_cooked_write_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST val)
{
- char *buf = alloca (REGISTER_RAW_SIZE (regnum));
- read_register_gen (regnum, buf);
- return (extract_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum)));
+ 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);
}
-ULONGEST
-read_register_pid (int regnum, ptid_t ptid)
+void
+regcache_raw_write (struct regcache *regcache, int regnum,
+ const gdb_byte *buf)
{
- ptid_t save_ptid;
- int save_pid;
- CORE_ADDR retval;
+ struct cleanup *old_chain;
- if (ptid_equal (ptid, inferior_ptid))
- return read_register (regnum);
+ gdb_assert (regcache != NULL && buf != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
+ gdb_assert (!regcache->readonly_p);
- save_ptid = inferior_ptid;
+ /* 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 (gdbarch_cannot_store_register (get_regcache_arch (regcache), regnum))
+ return;
- inferior_ptid = ptid;
+ /* 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;
- retval = read_register (regnum);
+ old_chain = save_inferior_ptid ();
+ inferior_ptid = regcache->ptid;
- inferior_ptid = save_ptid;
+ 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);
- return retval;
+ do_cleanups (old_chain);
}
-/* Return the contents of register REGNUM as a signed integer. */
-
-LONGEST
-read_signed_register (int regnum)
+void
+regcache_cooked_write (struct regcache *regcache, int regnum,
+ const gdb_byte *buf)
{
- void *buf = alloca (REGISTER_RAW_SIZE (regnum));
- read_register_gen (regnum, buf);
- return (extract_signed_integer (buf, REGISTER_RAW_SIZE (regnum)));
+ 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);
}
-LONGEST
-read_signed_register_pid (int regnum, ptid_t ptid)
-{
- ptid_t save_ptid;
- LONGEST retval;
-
- if (ptid_equal (ptid, inferior_ptid))
- return read_signed_register (regnum);
-
- save_ptid = inferior_ptid;
-
- inferior_ptid = ptid;
-
- retval = read_signed_register (regnum);
+/* Perform a partial register transfer using a read, modify, write
+ operation. */
- inferior_ptid = save_ptid;
+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);
- return retval;
+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);
+ }
}
-/* Store VALUE into the raw contents of register number REGNUM. */
-
void
-write_register (int regnum, LONGEST val)
+regcache_raw_read_part (struct regcache *regcache, int regnum,
+ int offset, int len, gdb_byte *buf)
{
- void *buf;
- int size;
- size = REGISTER_RAW_SIZE (regnum);
- buf = alloca (size);
- store_signed_integer (buf, size, (LONGEST) val);
- write_register_gen (regnum, 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);
}
void
-write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid)
+regcache_raw_write_part (struct regcache *regcache, int regnum,
+ int offset, int len, const gdb_byte *buf)
{
- ptid_t save_ptid;
-
- if (ptid_equal (ptid, inferior_ptid))
- {
- write_register (regnum, val);
- return;
- }
-
- save_ptid = inferior_ptid;
-
- inferior_ptid = ptid;
-
- write_register (regnum, val);
-
- inferior_ptid = save_ptid;
+ 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 (! ptid_equal (registers_ptid, inferior_ptid))
- {
- registers_changed ();
- registers_ptid = inferior_ptid;
- }
-#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];
- /* NOTE: cagney/2001-03-16: The macro CLEAN_UP_REGISTER_VALUE is
- going to be deprecated. Instead architectures will leave the raw
- register value as is and instead clean things up as they pass
- through the method gdbarch_register_read() clean up the
- values. */
+ if (buf)
+ memcpy (regbuf, buf, size);
+ else
+ memset (regbuf, 0, size);
-#ifdef DEPRECATED_CLEAN_UP_REGISTER_VALUE
- DEPRECATED_CLEAN_UP_REGISTER_VALUE (regnum, register_buffer (regnum));
-#endif
+ /* Mark the register as cached. */
+ regcache->register_valid_p[regnum] = 1;
}
+/* Collect register REGNUM from REGCACHE and store its contents in BUF. */
+
void
-regcache_collect (int regnum, void *buf)
+regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf)
{
- memcpy (buf, register_buffer (regnum), REGISTER_RAW_SIZE (regnum));
-}
-
+ const void *regbuf;
+ size_t size;
-/* read_pc, write_pc, read_sp, write_sp, read_fp, etc. Special
- handling for registers PC, SP, and FP. */
+ gdb_assert (regcache != NULL && buf != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
-/* NOTE: cagney/2001-02-18: The functions generic_target_read_pc(),
- read_pc_pid(), read_pc(), generic_target_write_pc(),
- write_pc_pid(), write_pc(), generic_target_read_sp(), read_sp(),
- generic_target_write_sp(), write_sp(), generic_target_read_fp() and
- read_fp(), will eventually be moved out of the reg-cache into
- either frame.[hc] or to the multi-arch framework. The are not part
- of the raw register cache. */
-
-/* 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.
+ regbuf = register_buffer (regcache, regnum);
+ size = regcache->descr->sizeof_register[regnum];
+ memcpy (buf, regbuf, size);
+}
- 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.
- 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). */
+/* Special handling for register PC. */
CORE_ADDR
-generic_target_read_pc (ptid_t ptid)
+regcache_read_pc (struct regcache *regcache)
{
-#ifdef PC_REGNUM
- if (PC_REGNUM >= 0)
- {
- CORE_ADDR pc_val = ADDR_BITS_REMOVE ((CORE_ADDR) read_register_pid (PC_REGNUM, ptid));
- return pc_val;
- }
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_read_pc");
- return 0;
-}
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
-CORE_ADDR
-read_pc_pid (ptid_t ptid)
-{
- ptid_t saved_inferior_ptid;
CORE_ADDR pc_val;
- /* In case ptid != inferior_ptid. */
- saved_inferior_ptid = inferior_ptid;
- inferior_ptid = ptid;
-
- pc_val = TARGET_READ_PC (ptid);
-
- inferior_ptid = saved_inferior_ptid;
+ 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_ptid);
-}
-
-void
-generic_target_write_pc (CORE_ADDR pc, ptid_t ptid)
-{
-#ifdef PC_REGNUM
- if (PC_REGNUM >= 0)
- write_register_pid (PC_REGNUM, pc, ptid);
- if (NPC_REGNUM >= 0)
- write_register_pid (NPC_REGNUM, pc + 4, ptid);
- if (NNPC_REGNUM >= 0)
- write_register_pid (NNPC_REGNUM, pc + 8, ptid);
-#else
- internal_error (__FILE__, __LINE__,
- "generic_target_write_pc");
-#endif
+ return regcache_read_pc (get_current_regcache ());
}
void
-write_pc_pid (CORE_ADDR pc, ptid_t ptid)
+regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
- ptid_t saved_inferior_ptid;
-
- /* In case ptid != inferior_ptid. */
- saved_inferior_ptid = inferior_ptid;
- inferior_ptid = ptid;
-
- TARGET_WRITE_PC (pc, ptid);
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
- inferior_ptid = saved_inferior_ptid;
+ 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_ptid);
+ 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)
+static void
+reg_flush_command (char *command, int from_tty)
{
-#ifdef SP_REGNUM
- if (SP_REGNUM >= 0)
- return read_register (SP_REGNUM);
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_read_sp");
+ /* Force-flush the register cache. */
+ registers_changed ();
+ if (from_tty)
+ printf_filtered (_("Register cache flushed.\n"));
}
-CORE_ADDR
-read_sp (void)
+static void
+dump_endian_bytes (struct ui_file *file, enum bfd_endian endian,
+ const unsigned char *buf, long len)
{
- return TARGET_READ_SP ();
+ int i;
+ switch (endian)
+ {
+ 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"));
+ }
}
-void
-generic_target_write_sp (CORE_ADDR val)
+enum regcache_dump_what
{
-#ifdef SP_REGNUM
- if (SP_REGNUM >= 0)
+ regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups
+};
+
+static void
+regcache_dump (struct regcache *regcache, struct ui_file *file,
+ enum regcache_dump_what what_to_dump)
+{
+ 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
+
+ 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++)
{
- write_register (SP_REGNUM, val);
- return;
+ /* 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");
}
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_write_sp");
+
+ 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
-write_sp (CORE_ADDR val)
+static void
+regcache_print (char *args, enum regcache_dump_what what_to_dump)
{
- TARGET_WRITE_SP (val);
+ if (args == NULL)
+ regcache_dump (get_current_regcache (), gdb_stdout, what_to_dump);
+ else
+ {
+ 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);
+ }
}
-CORE_ADDR
-generic_target_read_fp (void)
+static void
+maintenance_print_registers (char *args, int from_tty)
{
-#ifdef FP_REGNUM
- if (FP_REGNUM >= 0)
- return read_register (FP_REGNUM);
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_read_fp");
+ regcache_print (args, regcache_dump_none);
}
-CORE_ADDR
-read_fp (void)
+static void
+maintenance_print_raw_registers (char *args, int from_tty)
{
- return TARGET_READ_FP ();
+ regcache_print (args, regcache_dump_raw);
}
-/* ARGSUSED */
static void
-reg_flush_command (char *command, int from_tty)
+maintenance_print_cooked_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_cooked);
}
static void
-build_regcache (void)
+maintenance_print_register_groups (char *args, int from_tty)
{
- int i;
- int sizeof_register_valid;
- /* Come up with the real size of the registers buffer. */
- int sizeof_registers = REGISTER_BYTES; /* OK use. */
- for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
- {
- long regend;
- /* Keep extending the buffer so that there is always enough
- space for all registers. The comparison is necessary since
- legacy code is free to put registers in random places in the
- buffer separated by holes. Once REGISTER_BYTE() is killed
- this can be greatly simplified. */
- /* FIXME: cagney/2001-12-04: This code shouldn't need to use
- REGISTER_BYTE(). Unfortunatly, legacy code likes to lay the
- buffer out so that certain registers just happen to overlap.
- Ulgh! New targets use gdbarch's register read/write and
- entirely avoid this uglyness. */
- regend = REGISTER_BYTE (i) + REGISTER_RAW_SIZE (i);
- if (sizeof_registers < regend)
- sizeof_registers = regend;
- }
- registers = xmalloc (sizeof_registers);
- sizeof_register_valid = ((NUM_REGS + NUM_PSEUDO_REGS)
- * sizeof (*register_valid));
- 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)
{
- register_gdbarch_swap (®isters, sizeof (registers), NULL);
- register_gdbarch_swap (®ister_valid, sizeof (register_valid), NULL);
- register_gdbarch_swap (NULL, 0, build_regcache);
+ regcache_descr_handle = gdbarch_data_register_post_init (init_regcache_descr);
+
+ 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);
- /* Initialize the thread/process associated with the current set of
- registers. For now, -1 is special, and means `no current process'. */
- registers_ptid = pid_to_ptid (-1);
}