/* Cache and manage the values of registers for GDB, the GNU debugger.
- Copyright 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000,
- 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1986-2015 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 "gdb_assert.h"
+#include "reggroups.h"
+#include "observer.h"
+#include "remote.h"
+#include "valprint.h"
+#include "regset.h"
/*
* DATA STRUCTURE
*/
/* Per-architecture object describing the layout of a register cache.
- Computed once when the architecture is created */
+ Computed once when the architecture is created. */
struct gdbarch_data *regcache_descr_handle;
/* The architecture this descriptor belongs to. */
struct gdbarch *gdbarch;
- /* Is this a ``legacy'' register cache? Such caches reserve space
- for raw and pseudo registers and allow access to both. */
- int legacy_p;
-
- /* The raw register cache. This should contain just [0
- .. NUM_RAW_REGISTERS). However, for older targets, it contains
- space for the full [0 .. NUM_RAW_REGISTERS +
- NUM_PSEUDO_REGISTERS). */
+ /* 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;
-
- /* Offset, in bytes, of reach register in the raw register cache.
- Pseudo registers have an offset even though they don't
- (shouldn't) have a correspoinding space in the register cache.
- It is to keep existing code, that relies on
- write/write_register_bytes working. */
+ long sizeof_raw_register_status;
+
+ /* 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_status;
+
+ /* Offset and size (in 8 bit bytes), of each register in the
+ register cache. All registers (including those in the range
+ [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an
+ offset. */
long *register_offset;
-
- /* The cooked / frame / virtual register space. The registers in
- the range [0..NR_RAW_REGISTERS) should be mapped directly onto
- the corresponding raw register. The next [NR_RAW_REGISTERS
- .. NR_REGISTERS) should have been mapped, via
- gdbarch_register_read/write onto either raw registers or memory. */
- int nr_registers;
long *sizeof_register;
- long max_register_size;
+ /* Cached table containing the type of each register. */
+ struct type **register_type;
};
-static void *
-init_legacy_regcache_descr (struct gdbarch *gdbarch)
-{
- int i;
- struct regcache_descr *descr;
- /* FIXME: cagney/2002-05-11: gdbarch_data() should take that
- ``gdbarch'' as a parameter. */
- gdb_assert (gdbarch != NULL);
-
- descr = XMALLOC (struct regcache_descr);
- descr->gdbarch = gdbarch;
- descr->legacy_p = 1;
-
- /* FIXME: cagney/2002-05-11: Shouldn't be including pseudo-registers
- in the register buffer. Unfortunatly some architectures do. */
- descr->nr_registers = NUM_REGS + NUM_PSEUDO_REGS;
- descr->nr_raw_registers = descr->nr_registers;
- descr->sizeof_raw_register_valid_p = descr->nr_registers;
-
- /* FIXME: cagney/2002-05-11: Instead of using REGISTER_BYTE() this
- code should compute the offets et.al. at runtime. This currently
- isn't possible because some targets overlap register locations -
- see the mess in read_register_bytes() and write_register_bytes()
- registers. */
- descr->sizeof_register = XCALLOC (descr->nr_registers, long);
- descr->register_offset = XCALLOC (descr->nr_registers, long);
- descr->max_register_size = 0;
- for (i = 0; i < descr->nr_registers; i++)
- {
- descr->register_offset[i] = REGISTER_BYTE (i);
- descr->sizeof_register[i] = REGISTER_RAW_SIZE (i);
- if (descr->max_register_size < REGISTER_RAW_SIZE (i))
- descr->max_register_size = REGISTER_RAW_SIZE (i);
- }
-
- /* Come up with the real size of the registers buffer. */
- descr->sizeof_raw_registers = REGISTER_BYTES; /* OK use. */
- for (i = 0; i < descr->nr_registers; 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 = descr->register_offset[i] + descr->sizeof_register[i];
- if (descr->sizeof_raw_registers < regend)
- descr->sizeof_raw_registers = regend;
- }
- return descr;
-}
-
static void *
init_regcache_descr (struct gdbarch *gdbarch)
{
struct regcache_descr *descr;
gdb_assert (gdbarch != NULL);
- /* If an old style architecture, construct the register cache
- description using all the register macros. */
- if (!gdbarch_register_read_p (gdbarch)
- && !gdbarch_register_write_p (gdbarch))
- return init_legacy_regcache_descr (gdbarch);
-
- descr = XMALLOC (struct regcache_descr);
+ /* Create an initial, zero filled, table. */
+ descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr);
descr->gdbarch = gdbarch;
- descr->legacy_p = 0;
- /* Total size of the register space. The raw registers should
- directly map onto the raw register cache while the pseudo's are
+ /* 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_registers = NUM_REGS + NUM_PSEUDO_REGS;
+ descr->nr_cooked_registers = gdbarch_num_regs (gdbarch)
+ + gdbarch_num_pseudo_regs (gdbarch);
+ descr->sizeof_cooked_register_status
+ = 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 = NUM_REGS;
- descr->sizeof_raw_register_valid_p = NUM_REGS;
+ descr->nr_raw_registers = gdbarch_num_regs (gdbarch);
+ descr->sizeof_raw_register_status = gdbarch_num_regs (gdbarch);
- /* Lay out the register cache. The pseud-registers are included in
- the layout even though their value isn't stored in the register
- cache. Some code, via read_register_bytes() access a register
- using an offset/length rather than a register number.
+ /* Lay out the register cache.
- NOTE: cagney/2002-05-22: Only REGISTER_VIRTUAL_TYPE() needs to be
- used when constructing the register cache. It is assumed that
- register raw size, virtual size and type length of the type are
- all the same. */
+ 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 = XCALLOC (descr->nr_registers, long);
- descr->register_offset = XCALLOC (descr->nr_registers, long);
- descr->max_register_size = 0;
- for (i = 0; i < descr->nr_registers; i++)
+
+ 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_raw_registers; i++)
{
- descr->sizeof_register[i] = TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (i));
+ descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]);
descr->register_offset[i] = offset;
offset += descr->sizeof_register[i];
- if (descr->max_register_size < descr->sizeof_register[i])
- descr->max_register_size = descr->sizeof_register[i];
+ gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]);
}
- /* Set the real size of the register cache buffer. */
- /* FIXME: cagney/2002-05-22: Should only need to allocate space
- for the raw registers. Unfortunatly 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! */
+ /* Set the real size of the raw register cache buffer. */
descr->sizeof_raw_registers = offset;
- /* = descr->register_offset[descr->nr_raw_registers]; */
- }
-#if 0
- /* Sanity check. Confirm that the assumptions about gdbarch are
- true. The REGCACHE_DESCR_HANDLE is set before doing the checks
- so that targets using the generic methods supplied by regcache
- don't go into infinite recursion trying to, again, create the
- regcache. */
- set_gdbarch_data (gdbarch, regcache_descr_handle, descr);
- for (i = 0; i < descr->nr_registers; i++)
- {
- gdb_assert (descr->sizeof_register[i] == REGISTER_RAW_SIZE (i));
- gdb_assert (descr->sizeof_register[i] == REGISTER_VIRTUAL_SIZE (i));
- gdb_assert (descr->register_offset[i] == REGISTER_BYTE (i));
- }
- /* gdb_assert (descr->sizeof_raw_registers == REGISTER_BYTES (i)); */
-#endif
+ for (; 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 readonly register cache buffer. */
+ descr->sizeof_cooked_registers = offset;
+ }
return descr;
}
return gdbarch_data (gdbarch, regcache_descr_handle);
}
-static void
-xfree_regcache_descr (struct gdbarch *gdbarch, void *ptr)
+/* Utility functions returning useful register attributes stored in
+ the regcache descr. */
+
+struct type *
+register_type (struct gdbarch *gdbarch, int regnum)
{
- struct regcache_descr *descr = ptr;
- if (descr == NULL)
- return;
- xfree (descr->register_offset);
- xfree (descr->sizeof_register);
- descr->register_offset = NULL;
- descr->sizeof_register = NULL;
- xfree (descr);
+ 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 < (gdbarch_num_regs (gdbarch)
+ + gdbarch_num_pseudo_regs (gdbarch)));
+ size = descr->sizeof_register[regnum];
+ return size;
}
/* The register cache for storing raw register values. */
struct regcache
{
struct regcache_descr *descr;
- char *raw_registers;
- char *raw_register_valid_p;
- /* If a value isn't in the cache should the corresponding target be
- queried for a value. */
- int passthrough_p;
+
+ /* The address space of this register cache (for registers where it
+ makes sense, like PC or SP). */
+ struct address_space *aspace;
+
+ /* 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. */
+ signed char *register_status;
+ /* 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)
+static struct regcache *
+regcache_xmalloc_1 (struct gdbarch *gdbarch, struct address_space *aspace,
+ int readonly_p)
{
struct regcache_descr *descr;
struct regcache *regcache;
+
gdb_assert (gdbarch != NULL);
descr = regcache_descr (gdbarch);
- regcache = XMALLOC (struct regcache);
+ regcache = XNEW (struct regcache);
regcache->descr = descr;
- regcache->raw_registers
- = XCALLOC (descr->sizeof_raw_registers, char);
- regcache->raw_register_valid_p
- = XCALLOC (descr->sizeof_raw_register_valid_p, char);
- regcache->passthrough_p = 0;
+ regcache->readonly_p = readonly_p;
+ if (readonly_p)
+ {
+ regcache->registers
+ = XCNEWVEC (gdb_byte, descr->sizeof_cooked_registers);
+ regcache->register_status
+ = XCNEWVEC (signed char, descr->sizeof_cooked_register_status);
+ }
+ else
+ {
+ regcache->registers
+ = XCNEWVEC (gdb_byte, descr->sizeof_raw_registers);
+ regcache->register_status
+ = XCNEWVEC (signed char, descr->sizeof_raw_register_status);
+ }
+ regcache->aspace = aspace;
+ regcache->ptid = minus_one_ptid;
return regcache;
}
+struct regcache *
+regcache_xmalloc (struct gdbarch *gdbarch, struct address_space *aspace)
+{
+ return regcache_xmalloc_1 (gdbarch, aspace, 1);
+}
+
void
regcache_xfree (struct regcache *regcache)
{
if (regcache == NULL)
return;
- xfree (regcache->raw_registers);
- xfree (regcache->raw_register_valid_p);
+ xfree (regcache->registers);
+ xfree (regcache->register_status);
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);
+}
+
+/* Cleanup routines for invalidating a register. */
+
+struct register_to_invalidate
+{
+ struct regcache *regcache;
+ int regnum;
+};
+
+static void
+do_regcache_invalidate (void *data)
+{
+ struct register_to_invalidate *reg = data;
+
+ regcache_invalidate (reg->regcache, reg->regnum);
+}
+
+static struct cleanup *
+make_cleanup_regcache_invalidate (struct regcache *regcache, int regnum)
+{
+ struct register_to_invalidate* reg = XNEW (struct register_to_invalidate);
+
+ reg->regcache = regcache;
+ reg->regnum = regnum;
+ return make_cleanup_dtor (do_regcache_invalidate, (void *) reg, xfree);
+}
+
+/* Return REGCACHE's architecture. */
+
+struct gdbarch *
+get_regcache_arch (const struct regcache *regcache)
+{
+ return regcache->descr->gdbarch;
+}
+
+struct address_space *
+get_regcache_aspace (const struct regcache *regcache)
+{
+ return regcache->aspace;
+}
+
+/* Return a pointer to register REGNUM's buffer cache. */
+
+static gdb_byte *
+register_buffer (const struct regcache *regcache, int regnum)
+{
+ return regcache->registers + regcache->descr->register_offset[regnum];
+}
+
void
-regcache_cpy (struct regcache *dst, struct regcache *src)
+regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read,
+ void *src)
{
- int i;
- char *buf;
- gdb_assert (src != NULL && dst != NULL);
- gdb_assert (src->descr->gdbarch == dst->descr->gdbarch);
- gdb_assert (src != dst);
- /* FIXME: cagney/2002-05-17: To say this bit is bad is being polite.
- It keeps the existing code working where things rely on going
- through to the register cache. */
- if (src == current_regcache && src->descr->legacy_p)
- {
- /* ULGH!!!! Old way. Use REGISTER bytes and let code below
- untangle fetch. */
- read_register_bytes (0, dst->raw_registers, REGISTER_BYTES);
- return;
- }
- /* FIXME: cagney/2002-05-17: To say this bit is bad is being polite.
- It keeps the existing code working where things rely on going
- through to the register cache. */
- if (dst == current_regcache && dst->descr->legacy_p)
+ 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_status, 0,
+ dst->descr->sizeof_cooked_register_status);
+ /* 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++)
{
- /* ULGH!!!! Old way. Use REGISTER bytes and let code below
- untangle fetch. */
- write_register_bytes (0, src->raw_registers, REGISTER_BYTES);
- return;
+ if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup))
+ {
+ enum register_status status = cooked_read (src, regnum, buf);
+
+ if (status == REG_VALID)
+ memcpy (register_buffer (dst, regnum), buf,
+ register_size (gdbarch, regnum));
+ else
+ {
+ gdb_assert (status != REG_UNKNOWN);
+
+ memset (register_buffer (dst, regnum), 0,
+ register_size (gdbarch, regnum));
+ }
+ dst->register_status[regnum] = status;
+ }
}
- buf = alloca (src->descr->max_register_size);
- for (i = 0; i < src->descr->nr_raw_registers; i++)
+}
+
+static 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++)
{
- /* Should we worry about the valid bit here? */
- regcache_read (src, i, buf);
- regcache_write (dst, i, buf);
+ if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup))
+ {
+ enum register_status status;
+
+ status = cooked_read (cooked_read_context, regnum, buf);
+ if (status == REG_VALID)
+ regcache_cooked_write (dst, regnum, buf);
+ }
}
}
+static enum register_status
+do_cooked_read (void *src, int regnum, gdb_byte *buf)
+{
+ struct regcache *regcache = src;
+
+ return regcache_cooked_read (regcache, regnum, buf);
+}
+
+static void regcache_cpy_no_passthrough (struct regcache *dst,
+ struct regcache *src);
+
void
+regcache_cpy (struct regcache *dst, struct regcache *src)
+{
+ 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);
+}
+
+/* Copy/duplicate the contents of a register cache. Unlike regcache_cpy,
+ which is pass-through, this does not go through to the target.
+ Only values values already in the cache are transferred. The SRC and DST
+ buffers must not overlap. */
+
+static 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 completly invalid. */
- gdb_assert (dst != current_regcache);
- memcpy (dst->raw_registers, src->raw_registers,
- dst->descr->sizeof_raw_registers);
- memcpy (dst->raw_register_valid_p, src->raw_register_valid_p,
- dst->descr->sizeof_raw_register_valid_p);
+ move of data into a thread's regcache. Doing this would be silly
+ - it would mean that regcache->register_status would be
+ completely invalid. */
+ gdb_assert (dst->readonly_p && src->readonly_p);
+
+ memcpy (dst->registers, src->registers,
+ dst->descr->sizeof_cooked_registers);
+ memcpy (dst->register_status, src->register_status,
+ dst->descr->sizeof_cooked_register_status);
}
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);
+ newbuf = regcache_xmalloc (src->descr->gdbarch, get_regcache_aspace (src));
+ regcache_cpy (newbuf, src);
return newbuf;
}
-int
-regcache_valid_p (struct regcache *regcache, int regnum)
+enum register_status
+regcache_register_status (const struct regcache *regcache, int regnum)
{
gdb_assert (regcache != NULL);
- gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
- return regcache->raw_register_valid_p[regnum];
-}
+ gdb_assert (regnum >= 0);
+ if (regcache->readonly_p)
+ gdb_assert (regnum < regcache->descr->nr_cooked_registers);
+ else
+ gdb_assert (regnum < regcache->descr->nr_raw_registers);
-CORE_ADDR
-regcache_read_as_address (struct regcache *regcache, int regnum)
-{
- char *buf;
- gdb_assert (regcache != NULL);
- gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
- buf = alloca (regcache->descr->sizeof_register[regnum]);
- regcache_read (regcache, regnum, buf);
- return extract_address (buf, regcache->descr->sizeof_register[regnum]);
+ return regcache->register_status[regnum];
}
-char *
-deprecated_grub_regcache_for_registers (struct regcache *regcache)
+void
+regcache_invalidate (struct regcache *regcache, int regnum)
{
- return regcache->raw_registers;
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0);
+ gdb_assert (!regcache->readonly_p);
+ gdb_assert (regnum < regcache->descr->nr_raw_registers);
+ regcache->register_status[regnum] = REG_UNKNOWN;
}
-char *
-deprecated_grub_regcache_for_register_valid (struct regcache *regcache)
-{
- return regcache->raw_register_valid_p;
-}
/* Global structure containing the current regcache. */
-/* FIXME: cagney/2002-05-11: The two global arrays registers[] and
- 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
target when appropriate. */
-/* REGISTERS contains the cached register values (in target byte order). */
-
-char *registers;
-
-/* REGISTER_VALID is 0 if the register needs to be fetched,
- 1 if it has been fetched, and
- -1 if the register value was not available.
-
- "Not available" 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. */
+struct regcache_list
+{
+ struct regcache *regcache;
+ struct regcache_list *next;
+};
-signed char *register_valid;
+static struct regcache_list *current_regcache;
-/* The thread/process associated with the current set of registers. */
+struct regcache *
+get_thread_arch_aspace_regcache (ptid_t ptid, struct gdbarch *gdbarch,
+ struct address_space *aspace)
+{
+ struct regcache_list *list;
+ struct regcache *new_regcache;
-static ptid_t registers_ptid;
+ for (list = current_regcache; list; list = list->next)
+ if (ptid_equal (list->regcache->ptid, ptid)
+ && get_regcache_arch (list->regcache) == gdbarch)
+ return list->regcache;
-/*
- * FUNCTIONS:
- */
+ new_regcache = regcache_xmalloc_1 (gdbarch, aspace, 0);
+ new_regcache->ptid = ptid;
-/* REGISTER_CACHED()
+ list = xmalloc (sizeof (struct regcache_list));
+ list->regcache = new_regcache;
+ list->next = current_regcache;
+ current_regcache = list;
- 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). */
-
-int
-register_cached (int regnum)
-{
- return register_valid[regnum];
+ return new_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. */
-
-void
-set_register_cached (int regnum, int state)
+struct regcache *
+get_thread_arch_regcache (ptid_t ptid, struct gdbarch *gdbarch)
{
- register_valid[regnum] = state;
+ struct address_space *aspace;
+
+ /* For the benefit of "maint print registers" & co when debugging an
+ executable, allow dumping the regcache even when there is no
+ thread selected (target_thread_address_space internal-errors if
+ no address space is found). Note that normal user commands will
+ fail higher up on the call stack due to no
+ target_has_registers. */
+ aspace = (ptid_equal (null_ptid, ptid)
+ ? NULL
+ : target_thread_address_space (ptid));
+
+ return get_thread_arch_aspace_regcache (ptid, gdbarch, aspace);
}
-/* REGISTER_CHANGED
+static ptid_t current_thread_ptid;
+static struct gdbarch *current_thread_arch;
- invalidate a single register REGNUM in the cache */
-void
-register_changed (int regnum)
+struct regcache *
+get_thread_regcache (ptid_t ptid)
{
- 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. */
+ if (!current_thread_arch || !ptid_equal (current_thread_ptid, ptid))
+ {
+ current_thread_ptid = ptid;
+ current_thread_arch = target_thread_architecture (ptid);
+ }
-static char *
-register_buffer (struct regcache *regcache, int regnum)
-{
- return regcache->raw_registers + regcache->descr->register_offset[regnum];
+ return get_thread_arch_regcache (ptid, current_thread_arch);
}
-/* Return whether register REGNUM is a real register. */
-
-static int
-real_register (int regnum)
+struct regcache *
+get_current_regcache (void)
{
- return regnum >= 0 && regnum < NUM_REGS;
+ return get_thread_regcache (inferior_ptid);
}
-/* Return whether register REGNUM is a pseudo register. */
+/* See common/common-regcache.h. */
-static int
-pseudo_register (int regnum)
+struct regcache *
+get_thread_regcache_for_ptid (ptid_t ptid)
{
- return regnum >= NUM_REGS && regnum < NUM_REGS + NUM_PSEUDO_REGS;
+ return get_thread_regcache (ptid);
}
-/* Fetch register REGNUM into the cache. */
+/* Observer for the target_changed event. */
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);
+regcache_observer_target_changed (struct target_ops *target)
+{
+ registers_changed ();
}
-/* Write register REGNUM cached value to the target. */
-
+/* 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)
+{
+ struct regcache_list *list;
+
+ for (list = current_regcache; list; list = list->next)
+ if (ptid_equal (list->regcache->ptid, old_ptid))
+ list->regcache->ptid = new_ptid;
}
/* Low level examining and depositing of registers.
Indicate that registers may have changed, so invalidate the cache. */
void
-registers_changed (void)
+registers_changed_ptid (ptid_t ptid)
{
- int i;
+ struct regcache_list *list, **list_link;
- registers_ptid = pid_to_ptid (-1);
+ list = current_regcache;
+ list_link = ¤t_regcache;
+ while (list)
+ {
+ if (ptid_match (list->regcache->ptid, ptid))
+ {
+ struct regcache_list *dead = list;
+
+ *list_link = list->next;
+ regcache_xfree (list->regcache);
+ list = *list_link;
+ xfree (dead);
+ continue;
+ }
+
+ list_link = &list->next;
+ list = *list_link;
+ }
+
+ if (ptid_match (current_thread_ptid, ptid))
+ {
+ current_thread_ptid = null_ptid;
+ current_thread_arch = NULL;
+ }
+
+ if (ptid_match (inferior_ptid, ptid))
+ {
+ /* We just deleted the regcache of the current thread. Need to
+ forget about any frames we have cached, too. */
+ reinit_frame_cache ();
+ }
+}
+
+void
+registers_changed (void)
+{
+ registers_changed_ptid (minus_one_ptid);
/* 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);
+enum register_status
+regcache_raw_read (struct regcache *regcache, int regnum, gdb_byte *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
+ && regcache_register_status (regcache, regnum) == REG_UNKNOWN)
+ {
+ struct cleanup *old_chain = save_inferior_ptid ();
- if (registers_changed_hook)
- registers_changed_hook ();
-}
+ inferior_ptid = regcache->ptid;
+ target_fetch_registers (regcache, regnum);
+ do_cleanups (old_chain);
-/* REGISTERS_FETCHED ()
+ /* A number of targets can't access the whole set of raw
+ registers (because the debug API provides no means to get at
+ them). */
+ if (regcache->register_status[regnum] == REG_UNKNOWN)
+ regcache->register_status[regnum] = REG_UNAVAILABLE;
+ }
- Indicate that all registers have been fetched, so mark them all valid. */
+ if (regcache->register_status[regnum] != REG_VALID)
+ memset (buf, 0, regcache->descr->sizeof_register[regnum]);
+ else
+ memcpy (buf, register_buffer (regcache, regnum),
+ regcache->descr->sizeof_register[regnum]);
-/* 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. */
+ return regcache->register_status[regnum];
+}
-void
-registers_fetched (void)
+enum register_status
+regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val)
{
- int i;
+ gdb_byte *buf;
+ enum register_status status;
- 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. */
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ status = regcache_raw_read (regcache, regnum, buf);
+ if (status == REG_VALID)
+ *val = extract_signed_integer
+ (buf, regcache->descr->sizeof_register[regnum],
+ gdbarch_byte_order (regcache->descr->gdbarch));
+ else
+ *val = 0;
+ return status;
+}
-void
-read_register_bytes (int in_start, char *in_buf, int in_len)
+enum register_status
+regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST *val)
{
- 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. */
+ gdb_byte *buf;
+ enum register_status status;
- for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++)
- {
- 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;
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ status = regcache_raw_read (regcache, regnum, buf);
+ if (status == REG_VALID)
+ *val = extract_unsigned_integer
+ (buf, regcache->descr->sizeof_register[regnum],
+ gdbarch_byte_order (regcache->descr->gdbarch));
+ else
+ *val = 0;
+ return status;
+}
- /* end = min (reg_end, in_end) */
- if (reg_end < in_end)
- end = reg_end;
- else
- end = in_end;
+void
+regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val)
+{
+ void *buf;
- /* Transfer just the bytes common to both IN_BUF and REG_BUF */
- for (byte = start; byte < end; byte++)
- {
- in_buf[byte - in_start] = reg_buf[byte - reg_start];
- }
- }
+ 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],
+ gdbarch_byte_order (regcache->descr->gdbarch), val);
+ regcache_raw_write (regcache, regnum, buf);
}
-/* 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_write_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST 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);
+ void *buf;
- memcpy (myaddr, register_buffer (current_regcache, regnum),
- REGISTER_RAW_SIZE (regnum));
+ 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],
+ gdbarch_byte_order (regcache->descr->gdbarch), val);
+ regcache_raw_write (regcache, regnum, buf);
}
-void
-regcache_read (struct regcache *regcache, int regnum, char *buf)
+enum register_status
+regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf)
{
- gdb_assert (regcache != NULL && buf != NULL);
- gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
- if (regcache->descr->legacy_p
- && regcache->passthrough_p)
+ gdb_assert (regnum >= 0);
+ gdb_assert (regnum < regcache->descr->nr_cooked_registers);
+ if (regnum < regcache->descr->nr_raw_registers)
+ return regcache_raw_read (regcache, regnum, buf);
+ else if (regcache->readonly_p
+ && regcache->register_status[regnum] != REG_UNKNOWN)
{
- gdb_assert (regcache == current_regcache);
- /* For moment, just use underlying legacy code. Ulgh!!! This
- silently and very indirectly updates the regcache's regcache
- via the global register_valid[]. */
- legacy_read_register_gen (regnum, buf);
- return;
+ /* Read-only register cache, perhaps the cooked value was
+ cached? */
+ if (regcache->register_status[regnum] == REG_VALID)
+ memcpy (buf, register_buffer (regcache, regnum),
+ regcache->descr->sizeof_register[regnum]);
+ else
+ memset (buf, 0, regcache->descr->sizeof_register[regnum]);
+
+ return regcache->register_status[regnum];
}
- /* 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->passthrough_p)
+ else if (gdbarch_pseudo_register_read_value_p (regcache->descr->gdbarch))
{
- gdb_assert (regcache == current_regcache);
- if (! ptid_equal (registers_ptid, inferior_ptid))
+ struct value *mark, *computed;
+ enum register_status result = REG_VALID;
+
+ mark = value_mark ();
+
+ computed = gdbarch_pseudo_register_read_value (regcache->descr->gdbarch,
+ regcache, regnum);
+ if (value_entirely_available (computed))
+ memcpy (buf, value_contents_raw (computed),
+ regcache->descr->sizeof_register[regnum]);
+ else
{
- registers_changed ();
- registers_ptid = inferior_ptid;
+ memset (buf, 0, regcache->descr->sizeof_register[regnum]);
+ result = REG_UNAVAILABLE;
}
- if (!register_cached (regnum))
- fetch_register (regnum);
+
+ value_free_to_mark (mark);
+
+ return result;
}
- /* Copy the value directly into the register cache. */
- memcpy (buf, (regcache->raw_registers
- + regcache->descr->register_offset[regnum]),
- regcache->descr->sizeof_register[regnum]);
+ else
+ return gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache,
+ regnum, buf);
}
-void
-read_register_gen (int regnum, char *buf)
+struct value *
+regcache_cooked_read_value (struct regcache *regcache, int regnum)
{
- gdb_assert (current_regcache != NULL);
- gdb_assert (current_regcache->descr->gdbarch == current_gdbarch);
- if (current_regcache->descr->legacy_p)
+ gdb_assert (regnum >= 0);
+ gdb_assert (regnum < regcache->descr->nr_cooked_registers);
+
+ if (regnum < regcache->descr->nr_raw_registers
+ || (regcache->readonly_p
+ && regcache->register_status[regnum] != REG_UNKNOWN)
+ || !gdbarch_pseudo_register_read_value_p (regcache->descr->gdbarch))
{
- legacy_read_register_gen (regnum, buf);
- return;
+ struct value *result;
+
+ result = allocate_value (register_type (regcache->descr->gdbarch,
+ regnum));
+ VALUE_LVAL (result) = lval_register;
+ VALUE_REGNUM (result) = regnum;
+
+ /* It is more efficient in general to do this delegation in this
+ direction than in the other one, even though the value-based
+ API is preferred. */
+ if (regcache_cooked_read (regcache, regnum,
+ value_contents_raw (result)) == REG_UNAVAILABLE)
+ mark_value_bytes_unavailable (result, 0,
+ TYPE_LENGTH (value_type (result)));
+
+ return result;
}
- gdbarch_register_read (current_gdbarch, regnum, buf);
+ else
+ return gdbarch_pseudo_register_read_value (regcache->descr->gdbarch,
+ regcache, regnum);
}
+enum register_status
+regcache_cooked_read_signed (struct regcache *regcache, int regnum,
+ LONGEST *val)
+{
+ enum register_status status;
+ gdb_byte *buf;
-/* Write register REGNUM at MYADDR to the target. MYADDR points at
- REGISTER_RAW_BYTES(REGNUM), which must be in target byte-order. */
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ status = regcache_cooked_read (regcache, regnum, buf);
+ if (status == REG_VALID)
+ *val = extract_signed_integer
+ (buf, regcache->descr->sizeof_register[regnum],
+ gdbarch_byte_order (regcache->descr->gdbarch));
+ else
+ *val = 0;
+ return status;
+}
-static void
-legacy_write_register_gen (int regnum, char *myaddr)
+enum register_status
+regcache_cooked_read_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST *val)
{
- int size;
- gdb_assert (regnum >= 0 && regnum < (NUM_REGS + NUM_PSEUDO_REGS));
+ enum register_status status;
+ gdb_byte *buf;
- /* 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;
- }
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers);
+ buf = alloca (regcache->descr->sizeof_register[regnum]);
+ status = regcache_cooked_read (regcache, regnum, buf);
+ if (status == REG_VALID)
+ *val = extract_unsigned_integer
+ (buf, regcache->descr->sizeof_register[regnum],
+ gdbarch_byte_order (regcache->descr->gdbarch));
+ else
+ *val = 0;
+ return status;
+}
- size = REGISTER_RAW_SIZE (regnum);
+void
+regcache_cooked_write_signed (struct regcache *regcache, int regnum,
+ LONGEST val)
+{
+ void *buf;
- 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 (current_regcache, regnum), myaddr, size)
- == 0))
- return;
- else
- target_prepare_to_store ();
- }
+ 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],
+ gdbarch_byte_order (regcache->descr->gdbarch), val);
+ regcache_cooked_write (regcache, regnum, buf);
+}
- memcpy (register_buffer (current_regcache, regnum), myaddr, size);
+void
+regcache_cooked_write_unsigned (struct regcache *regcache, int regnum,
+ ULONGEST val)
+{
+ void *buf;
- set_register_cached (regnum, 1);
- store_register (regnum);
+ 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],
+ gdbarch_byte_order (regcache->descr->gdbarch), val);
+ regcache_cooked_write (regcache, regnum, buf);
}
void
-regcache_write (struct regcache *regcache, int regnum, char *buf)
+regcache_raw_write (struct regcache *regcache, int regnum,
+ const gdb_byte *buf)
{
+ struct cleanup *chain_before_save_inferior;
+ struct cleanup *chain_before_invalidate_register;
+
gdb_assert (regcache != NULL && buf != NULL);
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
-
- if (regcache->passthrough_p
- && regcache->descr->legacy_p)
- {
- /* For moment, just use underlying legacy code. Ulgh!!! This
- silently and very indirectly updates the regcache's buffers
- via the globals register_valid[] and registers[]. */
- gdb_assert (regcache == current_regcache);
- legacy_write_register_gen (regnum, buf);
- return;
- }
+ gdb_assert (!regcache->readonly_p);
/* On the sparc, writing %g0 is a no-op, so we don't even want to
change the registers array if something writes to this register. */
- if (CANNOT_STORE_REGISTER (regnum))
+ if (gdbarch_cannot_store_register (get_regcache_arch (regcache), regnum))
return;
- /* Handle the simple case first -> not write through so just store
- value in cache. */
- if (!regcache->passthrough_p)
- {
- memcpy ((regcache->raw_registers
- + regcache->descr->register_offset[regnum]), buf,
- regcache->descr->sizeof_register[regnum]);
- regcache->raw_register_valid_p[regnum] = 1;
- 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)
+ value, then don't bother doing the actual store. */
+ if (regcache_register_status (regcache, regnum) == REG_VALID
&& (memcmp (register_buffer (regcache, regnum), buf,
regcache->descr->sizeof_register[regnum]) == 0))
return;
- target_prepare_to_store ();
+ chain_before_save_inferior = save_inferior_ptid ();
+ inferior_ptid = regcache->ptid;
+
+ target_prepare_to_store (regcache);
memcpy (register_buffer (regcache, regnum), buf,
regcache->descr->sizeof_register[regnum]);
- regcache->raw_register_valid_p[regnum] = 1;
- store_register (regnum);
+ regcache->register_status[regnum] = REG_VALID;
+
+ /* Register a cleanup function for invalidating the register after it is
+ written, in case of a failure. */
+ chain_before_invalidate_register
+ = make_cleanup_regcache_invalidate (regcache, regnum);
+
+ target_store_registers (regcache, regnum);
+
+ /* The target did not throw an error so we can discard invalidating the
+ register and restore the cleanup chain to what it was. */
+ discard_cleanups (chain_before_invalidate_register);
+
+ do_cleanups (chain_before_save_inferior);
}
void
-write_register_gen (int regnum, char *buf)
+regcache_cooked_write (struct regcache *regcache, int regnum,
+ const gdb_byte *buf)
{
- gdb_assert (current_regcache != NULL);
- gdb_assert (current_regcache->descr->gdbarch == current_gdbarch);
- if (current_regcache->descr->legacy_p)
- {
- 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)
+/* Perform a partial register transfer using a read, modify, write
+ operation. */
+
+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);
+
+static enum register_status
+regcache_xfer_part (struct regcache *regcache, int regnum,
+ int offset, int len, void *in, const void *out,
+ enum register_status (*read) (struct regcache *regcache,
+ int regnum,
+ gdb_byte *buf),
+ void (*write) (struct regcache *regcache, int regnum,
+ const gdb_byte *buf))
{
- 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++)
+ 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 REG_VALID;
+ /* Read (when needed) ... */
+ if (in != NULL
+ || offset > 0
+ || offset + len < descr->sizeof_register[regnum])
{
- int regstart, regend;
-
- regstart = REGISTER_BYTE (regnum);
- regend = regstart + REGISTER_RAW_SIZE (regnum);
+ enum register_status status;
- /* 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);
+ gdb_assert (read != NULL);
+ status = read (regcache, regnum, reg);
+ if (status != REG_VALID)
+ return status;
+ }
+ /* ... 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);
+ }
- /* 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);
+ return REG_VALID;
+}
- memcpy (registers + overlapstart,
- myaddr + (overlapstart - myregstart),
- overlapend - overlapstart);
+enum register_status
+regcache_raw_read_part (struct regcache *regcache, int regnum,
+ int offset, int len, gdb_byte *buf)
+{
+ struct regcache_descr *descr = regcache->descr;
- store_register (regnum);
- }
- }
+ gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers);
+ return regcache_xfer_part (regcache, regnum, offset, len, buf, NULL,
+ regcache_raw_read, regcache_raw_write);
}
+void
+regcache_raw_write_part (struct regcache *regcache, int regnum,
+ int offset, int len, const gdb_byte *buf)
+{
+ struct regcache_descr *descr = regcache->descr;
-/* Return the contents of register REGNUM as an unsigned integer. */
+ gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers);
+ regcache_xfer_part (regcache, regnum, offset, len, NULL, buf,
+ regcache_raw_read, regcache_raw_write);
+}
-ULONGEST
-read_register (int regnum)
+enum register_status
+regcache_cooked_read_part (struct regcache *regcache, int regnum,
+ int offset, int len, gdb_byte *buf)
{
- 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;
+
+ gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers);
+ return regcache_xfer_part (regcache, regnum, offset, len, buf, NULL,
+ regcache_cooked_read, regcache_cooked_write);
}
-ULONGEST
-read_register_pid (int regnum, ptid_t ptid)
+void
+regcache_cooked_write_part (struct regcache *regcache, int regnum,
+ int offset, int len, const gdb_byte *buf)
{
- ptid_t save_ptid;
- int save_pid;
- CORE_ADDR retval;
+ struct regcache_descr *descr = regcache->descr;
- if (ptid_equal (ptid, inferior_ptid))
- return read_register (regnum);
+ gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers);
+ regcache_xfer_part (regcache, regnum, offset, len, NULL, buf,
+ regcache_cooked_read, regcache_cooked_write);
+}
- save_ptid = inferior_ptid;
+/* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */
- inferior_ptid = ptid;
+void
+regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf)
+{
+ void *regbuf;
+ size_t size;
- retval = read_register (regnum);
+ gdb_assert (regcache != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
+ gdb_assert (!regcache->readonly_p);
- inferior_ptid = save_ptid;
+ regbuf = register_buffer (regcache, regnum);
+ size = regcache->descr->sizeof_register[regnum];
- return retval;
+ if (buf)
+ {
+ memcpy (regbuf, buf, size);
+ regcache->register_status[regnum] = REG_VALID;
+ }
+ else
+ {
+ /* This memset not strictly necessary, but better than garbage
+ in case the register value manages to escape somewhere (due
+ to a bug, no less). */
+ memset (regbuf, 0, size);
+ regcache->register_status[regnum] = REG_UNAVAILABLE;
+ }
}
-/* Return the contents of register REGNUM as a signed integer. */
-
-LONGEST
-read_signed_register (int regnum)
-{
- void *buf = alloca (REGISTER_RAW_SIZE (regnum));
- read_register_gen (regnum, buf);
- return (extract_signed_integer (buf, REGISTER_RAW_SIZE (regnum)));
-}
+/* Collect register REGNUM from REGCACHE and store its contents in BUF. */
-LONGEST
-read_signed_register_pid (int regnum, ptid_t ptid)
+void
+regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf)
{
- ptid_t save_ptid;
- LONGEST retval;
-
- if (ptid_equal (ptid, inferior_ptid))
- return read_signed_register (regnum);
+ const void *regbuf;
+ size_t size;
- save_ptid = inferior_ptid;
+ gdb_assert (regcache != NULL && buf != NULL);
+ gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
- inferior_ptid = ptid;
+ regbuf = register_buffer (regcache, regnum);
+ size = regcache->descr->sizeof_register[regnum];
+ memcpy (buf, regbuf, size);
+}
- retval = read_signed_register (regnum);
+/* Transfer a single or all registers belonging to a certain register
+ set to or from a buffer. This is the main worker function for
+ regcache_supply_regset and regcache_collect_regset. */
- inferior_ptid = save_ptid;
+static void
+regcache_transfer_regset (const struct regset *regset,
+ const struct regcache *regcache,
+ struct regcache *out_regcache,
+ int regnum, const void *in_buf,
+ void *out_buf, size_t size)
+{
+ const struct regcache_map_entry *map;
+ int offs = 0, count;
- return retval;
+ for (map = regset->regmap; (count = map->count) != 0; map++)
+ {
+ int regno = map->regno;
+ int slot_size = map->size;
+
+ if (slot_size == 0 && regno != REGCACHE_MAP_SKIP)
+ slot_size = regcache->descr->sizeof_register[regno];
+
+ if (regno == REGCACHE_MAP_SKIP
+ || (regnum != -1
+ && (regnum < regno || regnum >= regno + count)))
+ offs += count * slot_size;
+
+ else if (regnum == -1)
+ for (; count--; regno++, offs += slot_size)
+ {
+ if (offs + slot_size > size)
+ break;
+
+ if (out_buf)
+ regcache_raw_collect (regcache, regno,
+ (gdb_byte *) out_buf + offs);
+ else
+ regcache_raw_supply (out_regcache, regno, in_buf
+ ? (const gdb_byte *) in_buf + offs
+ : NULL);
+ }
+ else
+ {
+ /* Transfer a single register and return. */
+ offs += (regnum - regno) * slot_size;
+ if (offs + slot_size > size)
+ return;
+
+ if (out_buf)
+ regcache_raw_collect (regcache, regnum,
+ (gdb_byte *) out_buf + offs);
+ else
+ regcache_raw_supply (out_regcache, regnum, in_buf
+ ? (const gdb_byte *) in_buf + offs
+ : NULL);
+ return;
+ }
+ }
}
-/* Store VALUE into the raw contents of register number REGNUM. */
+/* Supply register REGNUM from BUF to REGCACHE, using the register map
+ in REGSET. If REGNUM is -1, do this for all registers in REGSET.
+ If BUF is NULL, set the register(s) to "unavailable" status. */
void
-write_register (int regnum, LONGEST val)
+regcache_supply_regset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *buf, size_t size)
{
- void *buf;
- int size;
- size = REGISTER_RAW_SIZE (regnum);
- buf = alloca (size);
- store_signed_integer (buf, size, (LONGEST) val);
- write_register_gen (regnum, buf);
+ regcache_transfer_regset (regset, regcache, regcache, regnum,
+ buf, NULL, size);
}
+/* Collect register REGNUM from REGCACHE to BUF, using the register
+ map in REGSET. If REGNUM is -1, do this for all registers in
+ REGSET. */
+
void
-write_register_pid (int regnum, CORE_ADDR val, ptid_t ptid)
+regcache_collect_regset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *buf, size_t size)
{
- ptid_t save_ptid;
-
- if (ptid_equal (ptid, inferior_ptid))
- {
- write_register (regnum, val);
- return;
- }
+ regcache_transfer_regset (regset, regcache, NULL, regnum,
+ NULL, buf, size);
+}
- save_ptid = inferior_ptid;
- inferior_ptid = ptid;
+/* Special handling for register PC. */
- write_register (regnum, val);
+CORE_ADDR
+regcache_read_pc (struct regcache *regcache)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
- inferior_ptid = save_ptid;
-}
+ CORE_ADDR pc_val;
-/* SUPPLY_REGISTER()
+ 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;
- 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 (regcache_cooked_read_unsigned (regcache,
+ gdbarch_pc_regnum (gdbarch),
+ &raw_val) == REG_UNAVAILABLE)
+ throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available"));
- 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. */
+ pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val);
+ }
+ else
+ internal_error (__FILE__, __LINE__,
+ _("regcache_read_pc: Unable to find PC"));
+ return pc_val;
+}
void
-supply_register (int regnum, char *val)
+regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
-#if 1
- if (! ptid_equal (registers_ptid, inferior_ptid))
- {
- registers_changed ();
- registers_ptid = inferior_ptid;
- }
-#endif
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
- set_register_cached (regnum, 1);
- if (val)
- memcpy (register_buffer (current_regcache, regnum), val,
- REGISTER_RAW_SIZE (regnum));
+ 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
- memset (register_buffer (current_regcache, 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. */
-
- /* 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. */
+ internal_error (__FILE__, __LINE__,
+ _("regcache_write_pc: Unable to update PC"));
-#ifdef DEPRECATED_CLEAN_UP_REGISTER_VALUE
- DEPRECATED_CLEAN_UP_REGISTER_VALUE \
- (regnum, register_buffer (current_regcache, regnum));
-#endif
+ /* Writing the PC (for instance, from "load") invalidates the
+ current frame. */
+ reinit_frame_cache ();
}
-void
-regcache_collect (int regnum, void *buf)
+
+static void
+reg_flush_command (char *command, int from_tty)
{
- memcpy (buf, register_buffer (current_regcache, regnum),
- REGISTER_RAW_SIZE (regnum));
+ /* Force-flush the register cache. */
+ registers_changed ();
+ if (from_tty)
+ printf_filtered (_("Register cache flushed.\n"));
}
+enum regcache_dump_what
+{
+ regcache_dump_none, regcache_dump_raw,
+ regcache_dump_cooked, regcache_dump_groups,
+ regcache_dump_remote
+};
-/* read_pc, write_pc, read_sp, write_sp, read_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() 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.
+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;
+ gdb_byte buf[MAX_REGISTER_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.
+#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_status %ld\n",
+ regcache->descr->sizeof_raw_register_status);
+ 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
- Since the ``TARGET_READ_PC'' et.al. macro is going to be controlled
- by the multi-arch framework, it will eventually be possible to
- eliminate the intermediate read_pc_pid(). The client would call
- TARGET_READ_PC directly. (cagney). */
+ gdb_assert (regcache->descr->nr_cooked_registers
+ == (gdbarch_num_regs (gdbarch)
+ + gdbarch_num_pseudo_regs (gdbarch)));
-CORE_ADDR
-generic_target_read_pc (ptid_t ptid)
-{
-#ifdef PC_REGNUM
- if (PC_REGNUM >= 0)
+ for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++)
{
- 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;
-}
-
-CORE_ADDR
-read_pc_pid (ptid_t ptid)
-{
- ptid_t saved_inferior_ptid;
- CORE_ADDR pc_val;
+ /* Name. */
+ if (regnum < 0)
+ fprintf_unfiltered (file, " %-10s", "Name");
+ else
+ {
+ const char *p = gdbarch_register_name (gdbarch, regnum);
- /* In case ptid != inferior_ptid. */
- saved_inferior_ptid = inferior_ptid;
- inferior_ptid = ptid;
+ if (p == NULL)
+ p = "";
+ else if (p[0] == '\0')
+ p = "''";
+ fprintf_unfiltered (file, " %-10s", p);
+ }
- pc_val = TARGET_READ_PC (ptid);
+ /* Number. */
+ if (regnum < 0)
+ fprintf_unfiltered (file, " %4s", "Nr");
+ else
+ fprintf_unfiltered (file, " %4d", regnum);
- inferior_ptid = saved_inferior_ptid;
- return pc_val;
-}
+ /* 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)));
-CORE_ADDR
-read_pc (void)
-{
- return read_pc_pid (inferior_ptid);
-}
+ /* 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]);
+ }
-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);
-#else
- internal_error (__FILE__, __LINE__,
- "generic_target_write_pc");
-#endif
-}
+ /* Size. */
+ if (regnum < 0)
+ fprintf_unfiltered (file, " %5s ", "Size");
+ else
+ fprintf_unfiltered (file, " %5ld",
+ regcache->descr->sizeof_register[regnum]);
-void
-write_pc_pid (CORE_ADDR pc, ptid_t ptid)
-{
- ptid_t saved_inferior_ptid;
+ /* 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 (startswith (t, blt))
+ t += strlen (blt);
+ }
+ fprintf_unfiltered (file, " %-15s", t);
+ }
- /* In case ptid != inferior_ptid. */
- saved_inferior_ptid = inferior_ptid;
- inferior_ptid = ptid;
+ /* Leading space always present. */
+ fprintf_unfiltered (file, " ");
- TARGET_WRITE_PC (pc, ptid);
+ /* 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_register_status (regcache, regnum) == REG_UNKNOWN)
+ fprintf_unfiltered (file, "<invalid>");
+ else if (regcache_register_status (regcache, regnum) == REG_UNAVAILABLE)
+ fprintf_unfiltered (file, "<unavailable>");
+ else
+ {
+ regcache_raw_read (regcache, regnum, buf);
+ print_hex_chars (file, buf,
+ regcache->descr->sizeof_register[regnum],
+ gdbarch_byte_order (gdbarch));
+ }
+ }
- inferior_ptid = saved_inferior_ptid;
-}
+ /* Value, cooked. */
+ if (what_to_dump == regcache_dump_cooked)
+ {
+ if (regnum < 0)
+ fprintf_unfiltered (file, "Cooked value");
+ else
+ {
+ enum register_status status;
+
+ status = regcache_cooked_read (regcache, regnum, buf);
+ if (status == REG_UNKNOWN)
+ fprintf_unfiltered (file, "<invalid>");
+ else if (status == REG_UNAVAILABLE)
+ fprintf_unfiltered (file, "<unavailable>");
+ else
+ print_hex_chars (file, buf,
+ regcache->descr->sizeof_register[regnum],
+ gdbarch_byte_order (gdbarch));
+ }
+ }
-void
-write_pc (CORE_ADDR pc)
-{
- write_pc_pid (pc, inferior_ptid);
-}
+ /* 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 = ",";
+ }
+ }
+ }
+ }
-/* Cope with strage ways of getting to the stack and frame pointers */
+ /* Remote packet configuration. */
+ if (what_to_dump == regcache_dump_remote)
+ {
+ if (regnum < 0)
+ {
+ fprintf_unfiltered (file, "Rmt Nr g/G Offset");
+ }
+ else if (regnum < regcache->descr->nr_raw_registers)
+ {
+ int pnum, poffset;
+
+ if (remote_register_number_and_offset (get_regcache_arch (regcache), regnum,
+ &pnum, &poffset))
+ fprintf_unfiltered (file, "%7d %11d", pnum, poffset);
+ }
+ }
-CORE_ADDR
-generic_target_read_sp (void)
-{
-#ifdef SP_REGNUM
- if (SP_REGNUM >= 0)
- return read_register (SP_REGNUM);
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_read_sp");
-}
+ fprintf_unfiltered (file, "\n");
+ }
-CORE_ADDR
-read_sp (void)
-{
- return TARGET_READ_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
-generic_target_write_sp (CORE_ADDR val)
+static void
+regcache_print (char *args, enum regcache_dump_what what_to_dump)
{
-#ifdef SP_REGNUM
- if (SP_REGNUM >= 0)
+ if (args == NULL)
+ regcache_dump (get_current_regcache (), gdb_stdout, what_to_dump);
+ else
{
- write_register (SP_REGNUM, val);
- return;
+ struct cleanup *cleanups;
+ struct ui_file *file = gdb_fopen (args, "w");
+
+ if (file == NULL)
+ perror_with_name (_("maintenance print architecture"));
+ cleanups = make_cleanup_ui_file_delete (file);
+ regcache_dump (get_current_regcache (), file, what_to_dump);
+ do_cleanups (cleanups);
}
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_write_sp");
}
-void
-write_sp (CORE_ADDR val)
+static void
+maintenance_print_registers (char *args, int from_tty)
{
- TARGET_WRITE_SP (val);
+ regcache_print (args, regcache_dump_none);
}
-CORE_ADDR
-generic_target_read_fp (void)
+static void
+maintenance_print_raw_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_raw);
}
-CORE_ADDR
-read_fp (void)
+static void
+maintenance_print_cooked_registers (char *args, int from_tty)
{
- return TARGET_READ_FP ();
+ regcache_print (args, regcache_dump_cooked);
}
-/* ARGSUSED */
static void
-reg_flush_command (char *command, int from_tty)
+maintenance_print_register_groups (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_groups);
}
static void
-build_regcache (void)
+maintenance_print_remote_registers (char *args, int from_tty)
{
- current_regcache = regcache_xmalloc (current_gdbarch);
- current_regcache->passthrough_p = 1;
- registers = deprecated_grub_regcache_for_registers (current_regcache);
- register_valid = deprecated_grub_regcache_for_register_valid (current_regcache);
+ regcache_print (args, regcache_dump_remote);
}
+extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */
+
void
_initialize_regcache (void)
{
- regcache_descr_handle = register_gdbarch_data (init_regcache_descr,
- xfree_regcache_descr);
- REGISTER_GDBARCH_SWAP (current_regcache);
- 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);
+ add_cmd ("remote-registers", class_maintenance,
+ maintenance_print_remote_registers, _("\
+Print the internal register configuration including each register's\n\
+remote register number and buffer offset in the g/G packets.\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);
}
projects / deliverable / binutils-gdb.git / blobdiff