/* 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 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000,
+ 2001, 2002, 2004 Free Software Foundation, Inc.
This file is part of GDB.
#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.
*/
+/* Per-architecture object describing the layout of a register cache.
+ Computed once when the architecture is created */
+
+struct gdbarch_data *regcache_descr_handle;
+
+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 regigisters 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 = NUM_REGS + NUM_PSEUDO_REGS;
+ descr->sizeof_cooked_register_valid_p = NUM_REGS + NUM_PSEUDO_REGS;
+
+ /* 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 = NUM_REGS;
+
+ /* 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 [NUM_REGS
+ .. NUM_REGS + 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;
+
+ /* Sanity check. Confirm that there is agreement between the
+ regcache and the target's redundant DEPRECATED_REGISTER_BYTE (new
+ targets should not even be defining it). */
+ for (i = 0; i < descr->nr_cooked_registers; i++)
+ {
+ if (DEPRECATED_REGISTER_BYTE_P ())
+ gdb_assert (descr->register_offset[i] == DEPRECATED_REGISTER_BYTE (i));
+#if 0
+ gdb_assert (descr->sizeof_register[i] == DEPRECATED_REGISTER_RAW_SIZE (i));
+ gdb_assert (descr->sizeof_register[i] == DEPRECATED_REGISTER_VIRTUAL_SIZE (i));
+#endif
+ }
+ /* gdb_assert (descr->sizeof_raw_registers == DEPRECATED_REGISTER_BYTES (i)); */
+
+ return descr;
+}
+
+static struct regcache_descr *
+regcache_descr (struct gdbarch *gdbarch)
+{
+ return gdbarch_data (gdbarch, regcache_descr_handle);
+}
+
+/* Utility functions returning useful register attributes stored in
+ the regcache descr. */
+
+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];
+}
+
+/* Utility functions returning useful register attributes stored in
+ the regcache descr. */
+
+int
+register_size (struct gdbarch *gdbarch, int regnum)
+{
+ struct regcache_descr *descr = regcache_descr (gdbarch);
+ int size;
+ gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS));
+ size = descr->sizeof_register[regnum];
+ return size;
+}
+
+/* The register cache for storing raw register values. */
+
+struct regcache
+{
+ struct regcache_descr *descr;
+ /* The register buffers. A read-only register cache can hold the
+ full [0 .. NUM_REGS + NUM_PSEUDO_REGS) while a read/write
+ register cache can only hold [0 .. NUM_REGS). */
+ char *registers;
+ 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;
+};
+
+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, char);
+ regcache->register_valid_p
+ = XCALLOC (descr->sizeof_raw_register_valid_p, char);
+ regcache->readonly_p = 1;
+ return regcache;
+}
+
+void
+regcache_xfree (struct regcache *regcache)
+{
+ if (regcache == NULL)
+ return;
+ xfree (regcache->registers);
+ xfree (regcache->register_valid_p);
+ xfree (regcache);
+}
+
+static void
+do_regcache_xfree (void *data)
+{
+ regcache_xfree (data);
+}
+
+struct cleanup *
+make_cleanup_regcache_xfree (struct regcache *regcache)
+{
+ return make_cleanup (do_regcache_xfree, regcache);
+}
+
+/* Return REGCACHE's architecture. */
+
+struct gdbarch *
+get_regcache_arch (const struct regcache *regcache)
+{
+ return regcache->descr->gdbarch;
+}
+
+/* Return a pointer to register REGNUM's buffer cache. */
+
+static char *
+register_buffer (const struct regcache *regcache, int regnum)
+{
+ return regcache->registers + regcache->descr->register_offset[regnum];
+}
+
+void
+regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read,
+ void *src)
+{
+ struct gdbarch *gdbarch = dst->descr->gdbarch;
+ char 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 .. NUM_REGS +
+ 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 *src)
+{
+ struct gdbarch *gdbarch = dst->descr->gdbarch;
+ char 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 .. NUM_REGS
+ + 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 (src, regnum, buf);
+ if (valid)
+ regcache_cooked_write (dst, regnum, buf);
+ }
+ }
+}
+
+static int
+do_cooked_read (void *src, int regnum, void *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;
+}
+
+
+void
+regcache_cpy (struct regcache *dst, struct regcache *src)
+{
+ int i;
+ char *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);
+}
+
+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 != current_regcache);
+ 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);
+}
+
+struct regcache *
+regcache_dup (struct regcache *src)
+{
+ struct regcache *newbuf;
+ gdb_assert (current_regcache != NULL);
+ newbuf = regcache_xmalloc (src->descr->gdbarch);
+ regcache_cpy (newbuf, src);
+ return newbuf;
+}
+
+struct regcache *
+regcache_dup_no_passthrough (struct regcache *src)
+{
+ struct regcache *newbuf;
+ gdb_assert (current_regcache != NULL);
+ newbuf = regcache_xmalloc (src->descr->gdbarch);
+ regcache_cpy_no_passthrough (newbuf, src);
+ return newbuf;
+}
+
+int
+regcache_valid_p (struct regcache *regcache, int regnum)
+{
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
+ return regcache->register_valid_p[regnum];
+}
+
+char *
+deprecated_grub_regcache_for_registers (struct regcache *regcache)
+{
+ return regcache->registers;
+}
+
+/* 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. */
+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
/* REGISTERS contains the cached register values (in target byte order). */
-char *registers;
+char *deprecated_registers;
-/* REGISTER_VALID is 0 if the register needs to be fetched,
+/* DEPRECATED_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;
+ "Not available" indicates that the target is not not able to supply
+ the register at this state. The register may become available at a
+ later time (after the next resume). This often occures when GDB is
+ manipulating a target that contains only a snapshot of the entire
+ system being debugged - some of the registers in such a system may
+ not have been saved. */
+
+signed char *deprecated_register_valid;
/* The thread/process associated with the current set of registers. */
int
register_cached (int regnum)
{
- return register_valid[regnum];
+ return deprecated_register_valid[regnum];
}
/* Record that REGNUM's value is cached if STATE is >0, uncached but
void
set_register_cached (int regnum, int state)
{
- register_valid[regnum] = state;
-}
-
-/* REGISTER_CHANGED
-
- invalidate a single register REGNUM in the cache */
-void
-register_changed (int regnum)
-{
- set_register_cached (regnum, 0);
-}
-
-/* If REGNUM >= 0, return a pointer to register REGNUM's cache buffer area,
- else return a pointer to the start of the cache buffer. */
-
-static char *
-register_buffer (int regnum)
-{
- gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS));
- return ®isters[REGISTER_BYTE (regnum)];
+ gdb_assert (regnum >= 0);
+ gdb_assert (regnum < current_regcache->descr->nr_raw_registers);
+ current_regcache->register_valid_p[regnum] = state;
}
/* Return whether register REGNUM is a real register. */
return regnum >= 0 && regnum < NUM_REGS;
}
-/* Return whether register REGNUM is a pseudo register. */
+/* Observer for the target_changed event. */
-static int
-pseudo_register (int regnum)
+void
+regcache_observer_target_changed (struct target_ops *target)
{
- return regnum >= NUM_REGS && regnum < NUM_REGS + NUM_PSEUDO_REGS;
-}
-
-/* Fetch register REGNUM into the cache. */
-
-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);
- else
- target_fetch_registers (regnum);
-}
-
-/* Write register REGNUM cached value to the target. */
-
-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);
+ registers_changed ();
}
/* Low level examining and depositing of registers.
gdb gives control to the user (ie watchpoints). */
alloca (0);
- for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
+ for (i = 0; i < current_regcache->descr->nr_raw_registers; i++)
set_register_cached (i, 0);
- if (registers_changed_hook)
- registers_changed_hook ();
+ if (deprecated_registers_changed_hook)
+ deprecated_registers_changed_hook ();
}
-/* REGISTERS_FETCHED ()
+/* DEPRECATED_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
+ Since targets should only be using regcache_raw_supply() the need for
this function/hack is eliminated. */
void
-registers_fetched (void)
+deprecated_registers_fetched (void)
{
int i;
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.
+/* deprecated_read_register_bytes and deprecated_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. */
+ and deprecated_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)
+deprecated_read_register_bytes (int in_start, char *in_buf, int in_len)
{
int in_end = in_start + in_len;
int regnum;
- char *reg_buf = alloca (MAX_REGISTER_RAW_SIZE);
+ char reg_buf[MAX_REGISTER_SIZE];
/* See if we are trying to read bytes from out-of-date registers. If so,
update just those registers. */
int end;
int byte;
- reg_start = REGISTER_BYTE (regnum);
- reg_len = REGISTER_RAW_SIZE (regnum);
+ reg_start = DEPRECATED_REGISTER_BYTE (regnum);
+ reg_len = DEPRECATED_REGISTER_RAW_SIZE (regnum);
reg_end = reg_start + reg_len;
if (reg_end <= in_start || in_end <= reg_start)
if (REGISTER_NAME (regnum) != NULL && *REGISTER_NAME (regnum) != '\0')
/* Force the cache to fetch the entire register. */
- read_register_gen (regnum, reg_buf);
+ deprecated_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
/* 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);
+ memcpy (reg_buf, &deprecated_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
}
if (!register_cached (regnum))
- fetch_register (regnum);
+ target_fetch_registers (regnum);
- memcpy (myaddr, register_buffer (regnum),
- REGISTER_RAW_SIZE (regnum));
+ memcpy (myaddr, register_buffer (current_regcache, regnum),
+ DEPRECATED_REGISTER_RAW_SIZE (regnum));
}
void
-regcache_read (int rawnum, char *buf)
+regcache_raw_read (struct regcache *regcache, int regnum, void *buf)
{
- 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_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)
+ {
+ gdb_assert (regcache == current_regcache);
+ if (! ptid_equal (registers_ptid, inferior_ptid))
+ {
+ registers_changed ();
+ registers_ptid = inferior_ptid;
+ }
+ if (!register_cached (regnum))
+ target_fetch_registers (regnum);
+ }
+ /* Copy the value directly into the register cache. */
+ memcpy (buf, register_buffer (regcache, regnum),
+ regcache->descr->sizeof_register[regnum]);
}
void
-read_register_gen (int regnum, char *buf)
+regcache_raw_read_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);
+ char *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_raw_read_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST *val)
+{
+ char *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
+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);
+}
+
+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);
+}
+
+void
+deprecated_read_register_gen (int regnum, char *buf)
+{
+ gdb_assert (current_regcache != NULL);
+ gdb_assert (current_regcache->descr->gdbarch == current_gdbarch);
+ regcache_cooked_read (current_regcache, regnum, buf);
+}
+
+void
+regcache_cooked_read (struct regcache *regcache, int regnum, void *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
+regcache_cooked_read_signed (struct regcache *regcache, int regnum,
+ LONGEST *val)
+{
+ char *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]);
+}
+
+void
+regcache_cooked_read_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST *val)
+{
+ char *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);
+}
+
+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);
+}
/* 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)
+legacy_write_register_gen (int regnum, const void *myaddr)
{
int size;
gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS));
registers_ptid = inferior_ptid;
}
- size = REGISTER_RAW_SIZE (regnum);
+ size = DEPRECATED_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)
+ && (memcmp (register_buffer (current_regcache, regnum), myaddr, size)
+ == 0))
return;
else
target_prepare_to_store ();
}
- memcpy (register_buffer (regnum), myaddr, size);
+ memcpy (register_buffer (current_regcache, regnum), myaddr, size);
set_register_cached (regnum, 1);
- store_register (regnum);
+ target_store_registers (regnum);
+}
+
+void
+regcache_raw_write (struct regcache *regcache, int regnum, const void *buf)
+{
+ 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))
+ return;
+
+ /* Make certain that the correct cache is selected. */
+ gdb_assert (regcache == current_regcache);
+ if (! ptid_equal (registers_ptid, inferior_ptid))
+ {
+ registers_changed ();
+ registers_ptid = inferior_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;
+
+ target_prepare_to_store ();
+ memcpy (register_buffer (regcache, regnum), buf,
+ regcache->descr->sizeof_register[regnum]);
+ regcache->register_valid_p[regnum] = 1;
+ target_store_registers (regnum);
}
void
-regcache_write (int rawnum, char *buf)
+deprecated_write_register_gen (int regnum, char *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 (current_regcache != NULL);
+ gdb_assert (current_regcache->descr->gdbarch == current_gdbarch);
+ regcache_cooked_write (current_regcache, regnum, buf);
}
void
-write_register_gen (int regnum, char *buf)
+regcache_cooked_write (struct regcache *regcache, int regnum, const void *buf)
{
- if (! gdbarch_register_write_p (current_gdbarch))
- {
- legacy_write_register_gen (regnum, buf);
- return;
- }
- gdbarch_register_write (current_gdbarch, regnum, buf);
+ 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);
}
/* 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)
+deprecated_write_register_bytes (int myregstart, char *myaddr, int inlen)
{
int myregend = myregstart + inlen;
int regnum;
{
int regstart, regend;
- regstart = REGISTER_BYTE (regnum);
- regend = regstart + REGISTER_RAW_SIZE (regnum);
+ regstart = DEPRECATED_REGISTER_BYTE (regnum);
+ regend = regstart + DEPRECATED_REGISTER_RAW_SIZE (regnum);
/* Is this register completely outside the range the user is writing? */
if (myregend <= regstart || regend <= myregstart)
/* Is this register completely within the range the user is writing? */
else if (myregstart <= regstart && regend <= myregend)
- write_register_gen (regnum, myaddr + (regstart - myregstart));
+ deprecated_write_register_gen (regnum, myaddr + (regstart - myregstart));
/* The register partially overlaps the range being written. */
else
{
- char *regbuf = (char*) alloca (MAX_REGISTER_RAW_SIZE);
+ char regbuf[MAX_REGISTER_SIZE];
/* What's the overlap between this register's bytes and
those the caller wants to write? */
int overlapstart = max (regstart, myregstart);
/* 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);
+ deprecated_read_register_gen (regnum, regbuf);
- memcpy (registers + overlapstart,
+ memcpy (&deprecated_registers[overlapstart],
myaddr + (overlapstart - myregstart),
overlapend - overlapstart);
- store_register (regnum);
+ target_store_registers (regnum);
}
}
}
+/* Perform a partial register transfer using a read, modify, write
+ operation. */
-/* Return the contents of register REGNUM as an unsigned integer. */
+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);
-ULONGEST
-read_register (int regnum)
+static void
+regcache_xfer_part (struct regcache *regcache, int regnum,
+ int offset, int len, void *in, const void *out,
+ regcache_read_ftype *read, regcache_write_ftype *write)
{
- char *buf = alloca (REGISTER_RAW_SIZE (regnum));
- read_register_gen (regnum, buf);
- return (extract_unsigned_integer (buf, REGISTER_RAW_SIZE (regnum)));
+ struct regcache_descr *descr = regcache->descr;
+ bfd_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);
+ }
}
-ULONGEST
-read_register_pid (int regnum, ptid_t ptid)
+void
+regcache_raw_read_part (struct regcache *regcache, int regnum,
+ int offset, int len, void *buf)
{
- ptid_t save_ptid;
- int save_pid;
- CORE_ADDR retval;
-
- if (ptid_equal (ptid, inferior_ptid))
- return read_register (regnum);
+ 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);
+}
- save_ptid = inferior_ptid;
+void
+regcache_raw_write_part (struct regcache *regcache, int regnum,
+ int offset, int len, const void *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);
+}
- inferior_ptid = ptid;
+void
+regcache_cooked_read_part (struct regcache *regcache, int regnum,
+ int offset, int len, void *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);
+}
- retval = read_register (regnum);
+void
+regcache_cooked_write_part (struct regcache *regcache, int regnum,
+ int offset, int len, const void *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);
+}
- inferior_ptid = save_ptid;
+/* Hack to keep code that view the register buffer as raw bytes
+ working. */
- return retval;
+int
+register_offset_hack (struct gdbarch *gdbarch, int regnum)
+{
+ struct regcache_descr *descr = regcache_descr (gdbarch);
+ gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers);
+ return descr->register_offset[regnum];
}
-/* Return the contents of register REGNUM as a signed integer. */
+/* Return the contents of register REGNUM as an unsigned integer. */
-LONGEST
-read_signed_register (int regnum)
+ULONGEST
+read_register (int regnum)
{
- void *buf = alloca (REGISTER_RAW_SIZE (regnum));
- read_register_gen (regnum, buf);
- return (extract_signed_integer (buf, REGISTER_RAW_SIZE (regnum)));
+ char *buf = alloca (DEPRECATED_REGISTER_RAW_SIZE (regnum));
+ deprecated_read_register_gen (regnum, buf);
+ return (extract_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (regnum)));
}
-LONGEST
-read_signed_register_pid (int regnum, ptid_t ptid)
+ULONGEST
+read_register_pid (int regnum, ptid_t ptid)
{
ptid_t save_ptid;
- LONGEST retval;
+ int save_pid;
+ CORE_ADDR retval;
if (ptid_equal (ptid, inferior_ptid))
- return read_signed_register (regnum);
+ return read_register (regnum);
save_ptid = inferior_ptid;
inferior_ptid = ptid;
- retval = read_signed_register (regnum);
+ retval = read_register (regnum);
inferior_ptid = save_ptid;
{
void *buf;
int size;
- size = REGISTER_RAW_SIZE (regnum);
+ size = DEPRECATED_REGISTER_RAW_SIZE (regnum);
buf = alloca (size);
store_signed_integer (buf, size, (LONGEST) val);
- write_register_gen (regnum, buf);
+ deprecated_write_register_gen (regnum, buf);
}
void
inferior_ptid = save_ptid;
}
-/* SUPPLY_REGISTER()
-
- 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.
-
- 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))
+ void *regbuf;
+ size_t size;
+
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
+ gdb_assert (!regcache->readonly_p);
+
+ /* FIXME: kettenis/20030828: It shouldn't be necessary to handle
+ CURRENT_REGCACHE specially here. */
+ if (regcache == current_regcache
+ && !ptid_equal (registers_ptid, inferior_ptid))
{
registers_changed ();
registers_ptid = inferior_ptid;
}
-#endif
-
- 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));
- /* 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;
+ gdb_assert (regcache != NULL && buf != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
-/* read_pc, write_pc, read_sp, write_sp, read_fp, write_fp, etc.
- Special handling for registers PC, SP, and FP. */
-
-/* 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(),
- read_fp(), generic_target_write_fp(), write_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. */
+ regbuf = register_buffer (regcache, regnum);
+ size = regcache->descr->sizeof_register[regnum];
+ memcpy (buf, regbuf, size);
+}
-/* 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.
- 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.
+/* read_pc, write_pc, read_sp, deprecated_read_fp, etc. Special
+ handling for registers PC, SP, and FP. */
- 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). */
+/* NOTE: cagney/2001-02-18: The functions read_pc_pid(), read_pc(),
+ read_sp(), and deprecated_read_fp(), will eventually be replaced by
+ per-frame methods. Instead of relying on the global INFERIOR_PTID,
+ they will use the contextual information provided by the FRAME.
+ These functions do not belong in the register cache. */
-CORE_ADDR
-generic_target_read_pc (ptid_t ptid)
-{
-#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;
-}
+/* NOTE: cagney/2003-06-07: The functions generic_target_write_pc(),
+ write_pc_pid(), write_pc(), and deprecated_read_fp(), all need to
+ be replaced by something that does not rely on global state. But
+ what? */
CORE_ADDR
read_pc_pid (ptid_t ptid)
saved_inferior_ptid = inferior_ptid;
inferior_ptid = ptid;
- pc_val = TARGET_READ_PC (ptid);
+ if (TARGET_READ_PC_P ())
+ pc_val = TARGET_READ_PC (ptid);
+ /* Else use per-frame method on get_current_frame. */
+ else if (PC_REGNUM >= 0)
+ {
+ CORE_ADDR raw_val = read_register_pid (PC_REGNUM, ptid);
+ pc_val = ADDR_BITS_REMOVE (raw_val);
+ }
+ else
+ internal_error (__FILE__, __LINE__, "read_pc_pid: Unable to find PC");
inferior_ptid = saved_inferior_ptid;
return pc_val;
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
+ else
+ internal_error (__FILE__, __LINE__,
+ "generic_target_write_pc");
}
void
/* Cope with strage ways of getting to the stack and frame pointers */
CORE_ADDR
-generic_target_read_sp (void)
+read_sp (void)
{
-#ifdef SP_REGNUM
- if (SP_REGNUM >= 0)
+ if (TARGET_READ_SP_P ())
+ return TARGET_READ_SP ();
+ else if (gdbarch_unwind_sp_p (current_gdbarch))
+ return get_frame_sp (get_current_frame ());
+ else if (SP_REGNUM >= 0)
+ /* Try SP_REGNUM last: this makes all sorts of [wrong] assumptions
+ about the architecture so put it at the end. */
return read_register (SP_REGNUM);
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_read_sp");
+ internal_error (__FILE__, __LINE__, "read_sp: Unable to find SP");
+}
+
+void
+deprecated_write_sp (CORE_ADDR val)
+{
+ gdb_assert (SP_REGNUM >= 0);
+ write_register (SP_REGNUM, val);
}
CORE_ADDR
-read_sp (void)
+deprecated_read_fp (void)
{
- return TARGET_READ_SP ();
+ if (DEPRECATED_TARGET_READ_FP_P ())
+ return DEPRECATED_TARGET_READ_FP ();
+ else if (DEPRECATED_FP_REGNUM >= 0)
+ return read_register (DEPRECATED_FP_REGNUM);
+ else
+ internal_error (__FILE__, __LINE__, "deprecated_read_fp");
}
-void
-generic_target_write_sp (CORE_ADDR val)
+static void
+reg_flush_command (char *command, int from_tty)
{
-#ifdef SP_REGNUM
- if (SP_REGNUM >= 0)
- {
- write_register (SP_REGNUM, val);
- return;
- }
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_write_sp");
+ /* Force-flush the register cache. */
+ registers_changed ();
+ if (from_tty)
+ printf_filtered ("Register cache flushed.\n");
}
-void
-write_sp (CORE_ADDR val)
+static void
+build_regcache (void)
{
- TARGET_WRITE_SP (val);
+ current_regcache = regcache_xmalloc (current_gdbarch);
+ current_regcache->readonly_p = 0;
+ deprecated_registers = deprecated_grub_regcache_for_registers (current_regcache);
+ deprecated_register_valid = current_regcache->register_valid_p;
}
-CORE_ADDR
-generic_target_read_fp (void)
+static void
+dump_endian_bytes (struct ui_file *file, enum bfd_endian endian,
+ const unsigned char *buf, long len)
{
-#ifdef FP_REGNUM
- if (FP_REGNUM >= 0)
- return read_register (FP_REGNUM);
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_read_fp");
+ 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");
+ }
}
-CORE_ADDR
-read_fp (void)
+enum regcache_dump_what
{
- return TARGET_READ_FP ();
+ 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, "NUM_REGS %d\n", NUM_REGS);
+ fprintf_unfiltered (file, "NUM_PSEUDO_REGS %d\n", NUM_PSEUDO_REGS);
+#endif
+
+ gdb_assert (regcache->descr->nr_cooked_registers
+ == (NUM_REGS + NUM_PSEUDO_REGS));
+
+ for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++)
+ {
+ /* Name. */
+ if (regnum < 0)
+ fprintf_unfiltered (file, " %-10s", "Name");
+ else
+ {
+ const char *p = REGISTER_NAME (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 < NUM_REGS)
+ fprintf_unfiltered (file, " %4d", regnum);
+ else
+ fprintf_unfiltered (file, " %4d", (regnum - NUM_REGS));
+
+ /* 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]
+ || register_offset != DEPRECATED_REGISTER_BYTE (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]);
+ if ((regcache->descr->sizeof_register[regnum]
+ != DEPRECATED_REGISTER_RAW_SIZE (regnum))
+ || (regcache->descr->sizeof_register[regnum]
+ != DEPRECATED_REGISTER_VIRTUAL_SIZE (regnum))
+ || (regcache->descr->sizeof_register[regnum]
+ != TYPE_LENGTH (register_type (regcache->descr->gdbarch,
+ regnum)))
+ )
+ {
+ if (!footnote_register_size)
+ footnote_register_size = ++footnote_nr;
+ fprintf_unfiltered (file, "*%d", footnote_register_size);
+ }
+ else
+ fprintf_unfiltered (file, " ");
+ }
+
+ /* 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, TARGET_BYTE_ORDER, buf,
+ DEPRECATED_REGISTER_RAW_SIZE (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, TARGET_BYTE_ORDER, buf,
+ DEPRECATED_REGISTER_VIRTUAL_SIZE (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 (current_regcache, gdb_stdout, what_to_dump);
+ else
{
- write_register (FP_REGNUM, val);
- return;
+ struct ui_file *file = gdb_fopen (args, "w");
+ if (file == NULL)
+ perror_with_name ("maintenance print architecture");
+ regcache_dump (current_regcache, file, what_to_dump);
+ ui_file_delete (file);
}
-#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
-build_regcache (void)
+maintenance_print_cooked_registers (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_cooked);
}
+static void
+maintenance_print_register_groups (char *args, int from_tty)
+{
+ 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);
+ DEPRECATED_REGISTER_GDBARCH_SWAP (current_regcache);
+ DEPRECATED_REGISTER_GDBARCH_SWAP (deprecated_registers);
+ DEPRECATED_REGISTER_GDBARCH_SWAP (deprecated_register_valid);
+ deprecated_register_gdbarch_swap (NULL, 0, build_regcache);
+
+ observer_attach_target_changed (regcache_observer_target_changed);
add_com ("flushregs", class_maintenance, reg_flush_command,
"Force gdb to flush its register cache (maintainer command)");
/* 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);
+
+ add_cmd ("registers", class_maintenance,
+ maintenance_print_registers,
+ "Print the internal register configuration.\
+Takes an optional file parameter.",
+ &maintenanceprintlist);
+ add_cmd ("raw-registers", class_maintenance,
+ maintenance_print_raw_registers,
+ "Print the internal register configuration including raw values.\
+Takes an optional file parameter.",
+ &maintenanceprintlist);
+ add_cmd ("cooked-registers", class_maintenance,
+ maintenance_print_cooked_registers,
+ "Print the internal register configuration including cooked values.\
+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.\
+Takes an optional file parameter.",
+ &maintenanceprintlist);
+
}
projects / deliverable / binutils-gdb.git / blobdiff