/* Cache and manage the values of registers for GDB, the GNU debugger.
- Copyright (C) 1986-1987, 1989, 1991, 1994-1996, 1998, 2000-2002,
- 2004, 2007-2012 Free Software Foundation, Inc.
+ Copyright (C) 1986-2016 Free Software Foundation, Inc.
This file is part of GDB.
#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"
-#include "exceptions.h"
#include "remote.h"
+#include "valprint.h"
+#include "regset.h"
/*
* DATA STRUCTURE
static struct regcache_descr *
regcache_descr (struct gdbarch *gdbarch)
{
- return gdbarch_data (gdbarch, regcache_descr_handle);
+ return (struct regcache_descr *) gdbarch_data (gdbarch,
+ regcache_descr_handle);
}
/* Utility functions returning useful register attributes stored in
return size;
}
+/* See common/common-regcache.h. */
+
+int
+regcache_register_size (const struct regcache *regcache, int n)
+{
+ return register_size (get_regcache_arch (regcache), n);
+}
+
/* The register cache for storing raw register values. */
struct regcache
gdb_assert (gdbarch != NULL);
descr = regcache_descr (gdbarch);
- regcache = XMALLOC (struct regcache);
+ regcache = XNEW (struct regcache);
regcache->descr = descr;
regcache->readonly_p = readonly_p;
if (readonly_p)
{
regcache->registers
- = XCALLOC (descr->sizeof_cooked_registers, gdb_byte);
+ = XCNEWVEC (gdb_byte, descr->sizeof_cooked_registers);
regcache->register_status
- = XCALLOC (descr->sizeof_cooked_register_status, gdb_byte);
+ = XCNEWVEC (signed char, descr->sizeof_cooked_register_status);
}
else
{
regcache->registers
- = XCALLOC (descr->sizeof_raw_registers, gdb_byte);
+ = XCNEWVEC (gdb_byte, descr->sizeof_raw_registers);
regcache->register_status
- = XCALLOC (descr->sizeof_raw_register_status, gdb_byte);
+ = XCNEWVEC (signed char, descr->sizeof_raw_register_status);
}
regcache->aspace = aspace;
regcache->ptid = minus_one_ptid;
static void
do_regcache_xfree (void *data)
{
- regcache_xfree (data);
+ regcache_xfree ((struct regcache *) data);
}
struct cleanup *
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 = (struct register_to_invalidate *) 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 *
static enum register_status
do_cooked_read (void *src, int regnum, gdb_byte *buf)
{
- struct regcache *regcache = src;
+ struct regcache *regcache = (struct 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)
{
regcache_cpy_no_passthrough (dst, src);
}
-void
+/* 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)
{
gdb_assert (src != NULL && dst != NULL);
else
gdb_assert (regnum < regcache->descr->nr_raw_registers);
- return regcache->register_status[regnum];
+ return (enum register_status) regcache->register_status[regnum];
}
void
new_regcache = regcache_xmalloc_1 (gdbarch, aspace, 0);
new_regcache->ptid = ptid;
- list = xmalloc (sizeof (struct regcache_list));
+ list = XNEW (struct regcache_list);
list->regcache = new_regcache;
list->next = current_regcache;
current_regcache = list;
return get_thread_regcache (inferior_ptid);
}
+/* See common/common-regcache.h. */
+
+struct regcache *
+get_thread_regcache_for_ptid (ptid_t ptid)
+{
+ return get_thread_regcache (ptid);
+}
/* Observer for the target_changed event. */
memcpy (buf, register_buffer (regcache, regnum),
regcache->descr->sizeof_register[regnum]);
- return regcache->register_status[regnum];
+ return (enum register_status) regcache->register_status[regnum];
}
enum register_status
gdb_assert (regcache != NULL);
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
- buf = alloca (regcache->descr->sizeof_register[regnum]);
+ buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
status = regcache_raw_read (regcache, regnum, buf);
if (status == REG_VALID)
*val = extract_signed_integer
gdb_assert (regcache != NULL);
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
- buf = alloca (regcache->descr->sizeof_register[regnum]);
+ buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
status = regcache_raw_read (regcache, regnum, buf);
if (status == REG_VALID)
*val = extract_unsigned_integer
void
regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val)
{
- void *buf;
+ gdb_byte *buf;
gdb_assert (regcache != NULL);
gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers);
- buf = alloca (regcache->descr->sizeof_register[regnum]);
+ buf = (gdb_byte *) 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);
regcache_raw_write_unsigned (struct regcache *regcache, int regnum,
ULONGEST val)
{
- void *buf;
+ gdb_byte *buf;
gdb_assert (regcache != NULL);
gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers);
- buf = alloca (regcache->descr->sizeof_register[regnum]);
+ buf = (gdb_byte *) 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);
}
+LONGEST
+regcache_raw_get_signed (struct regcache *regcache, int regnum)
+{
+ LONGEST value;
+ enum register_status status;
+
+ status = regcache_raw_read_signed (regcache, regnum, &value);
+ if (status == REG_UNAVAILABLE)
+ throw_error (NOT_AVAILABLE_ERROR,
+ _("Register %d is not available"), regnum);
+ return value;
+}
+
enum register_status
regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf)
{
{
/* Read-only register cache, perhaps the cooked value was
cached? */
- struct gdbarch *gdbarch = regcache->descr->gdbarch;
-
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];
+ return (enum register_status) regcache->register_status[regnum];
}
else if (gdbarch_pseudo_register_read_value_p (regcache->descr->gdbarch))
{
gdb_assert (regcache != NULL);
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers);
- buf = alloca (regcache->descr->sizeof_register[regnum]);
+ buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
status = regcache_cooked_read (regcache, regnum, buf);
if (status == REG_VALID)
*val = extract_signed_integer
gdb_assert (regcache != NULL);
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers);
- buf = alloca (regcache->descr->sizeof_register[regnum]);
+ buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
status = regcache_cooked_read (regcache, regnum, buf);
if (status == REG_VALID)
*val = extract_unsigned_integer
regcache_cooked_write_signed (struct regcache *regcache, int regnum,
LONGEST val)
{
- void *buf;
+ gdb_byte *buf;
gdb_assert (regcache != NULL);
gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers);
- buf = alloca (regcache->descr->sizeof_register[regnum]);
+ buf = (gdb_byte *) 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);
regcache_cooked_write_unsigned (struct regcache *regcache, int regnum,
ULONGEST val)
{
- void *buf;
+ gdb_byte *buf;
gdb_assert (regcache != NULL);
gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers);
- buf = alloca (regcache->descr->sizeof_register[regnum]);
+ buf = (gdb_byte *) 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);
}
+/* See regcache.h. */
+
+void
+regcache_raw_set_cached_value (struct regcache *regcache, int regnum,
+ const gdb_byte *buf)
+{
+ memcpy (register_buffer (regcache, regnum), buf,
+ regcache->descr->sizeof_register[regnum]);
+ regcache->register_status[regnum] = REG_VALID;
+}
+
void
regcache_raw_write (struct regcache *regcache, int regnum,
const gdb_byte *buf)
{
- struct cleanup *old_chain;
+ 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);
regcache->descr->sizeof_register[regnum]) == 0))
return;
- old_chain = save_inferior_ptid ();
+ 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->register_status[regnum] = REG_VALID;
+ regcache_raw_set_cached_value (regcache, regnum, buf);
+
+ /* 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);
- do_cleanups (old_chain);
+ /* 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
memcpy (buf, regbuf, size);
}
+/* 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. */
+
+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;
+
+ for (map = (const struct regcache_map_entry *) 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;
+ }
+ }
+}
+
+/* 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
+regcache_supply_regset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *buf, size_t size)
+{
+ 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
+regcache_collect_regset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *buf, size_t size)
+{
+ regcache_transfer_regset (regset, regcache, NULL, regnum,
+ NULL, buf, size);
+}
+
/* Special handling for register PC. */
printf_filtered (_("Register cache flushed.\n"));
}
-static void
-dump_endian_bytes (struct ui_file *file, enum bfd_endian endian,
- const unsigned char *buf, long len)
-{
- 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"));
- }
-}
-
enum regcache_dump_what
{
regcache_dump_none, regcache_dump_raw,
int footnote_register_offset = 0;
int footnote_register_type_name_null = 0;
long register_offset = 0;
- unsigned char buf[MAX_REGISTER_SIZE];
+ gdb_byte buf[MAX_REGISTER_SIZE];
#if 0
fprintf_unfiltered (file, "nr_raw_registers %d\n",
t = n;
}
/* Chop a leading builtin_type. */
- if (strncmp (t, blt, strlen (blt)) == 0)
+ if (startswith (t, blt))
t += strlen (blt);
}
fprintf_unfiltered (file, " %-15s", t);
else
{
regcache_raw_read (regcache, regnum, buf);
- fprintf_unfiltered (file, "0x");
- dump_endian_bytes (file,
- gdbarch_byte_order (gdbarch), buf,
- regcache->descr->sizeof_register[regnum]);
+ print_hex_chars (file, buf,
+ regcache->descr->sizeof_register[regnum],
+ gdbarch_byte_order (gdbarch));
}
}
else if (status == REG_UNAVAILABLE)
fprintf_unfiltered (file, "<unavailable>");
else
- {
- fprintf_unfiltered (file, "0x");
- dump_endian_bytes (file,
- gdbarch_byte_order (gdbarch), buf,
- regcache->descr->sizeof_register[regnum]);
- }
+ print_hex_chars (file, buf,
+ regcache->descr->sizeof_register[regnum],
+ gdbarch_byte_order (gdbarch));
}
}
projects / deliverable / binutils-gdb.git / blobdiff