#include "defs.h"
#include "inferior.h"
+#include "gdbthread.h"
#include "target.h"
#include "gdbarch.h"
#include "gdbcmd.h"
m_ptid = minus_one_ptid;
}
-static enum register_status
-do_cooked_read (void *src, int regnum, gdb_byte *buf)
-{
- struct regcache *regcache = (struct regcache *) src;
-
- return regcache->cooked_read (regnum, buf);
-}
-
-readonly_detached_regcache::readonly_detached_regcache (const regcache &src)
- : readonly_detached_regcache (src.arch (), do_cooked_read, (void *) &src)
+readonly_detached_regcache::readonly_detached_regcache (regcache &src)
+ : readonly_detached_regcache (src.arch (),
+ [&src] (int regnum, gdb_byte *buf)
+ {
+ return src.cooked_read (regnum, buf);
+ })
{
}
}
void
-reg_buffer::save (regcache_cooked_read_ftype *cooked_read,
- void *src)
+reg_buffer::save (register_read_ftype cooked_read)
{
struct gdbarch *gdbarch = m_descr->gdbarch;
int regnum;
if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup))
{
gdb_byte *dst_buf = register_buffer (regnum);
- enum register_status status = cooked_read (src, regnum, dst_buf);
+ enum register_status status = cooked_read (regnum, dst_buf);
gdb_assert (status != REG_UNKNOWN);
return get_thread_arch_regcache (ptid, current_thread_arch);
}
+/* See regcache.h. */
+
+struct regcache *
+get_thread_regcache (thread_info *thread)
+{
+ return get_thread_regcache (thread->ptid);
+}
+
struct regcache *
get_current_regcache (void)
{
- return get_thread_regcache (inferior_ptid);
+ return get_thread_regcache (inferior_thread ());
}
/* See common/common-regcache.h. */
it != regcache::current_regcache.end ();
)
{
- if (ptid_match ((*it)->ptid (), ptid))
+ if ((*it)->ptid ().matches (ptid))
{
delete *it;
it = regcache::current_regcache.erase_after (oit);
oit = it++;
}
- if (ptid_match (current_thread_ptid, ptid))
+ if (current_thread_ptid.matches (ptid))
{
current_thread_ptid = null_ptid;
current_thread_arch = NULL;
}
- if (ptid_match (inferior_ptid, ptid))
+ if (inferior_ptid.matches (ptid))
{
/* We just deleted the regcache of the current thread. Need to
forget about any frames we have cached, too. */
}
}
+/* See regcache.h. */
+
+void
+registers_changed_thread (thread_info *thread)
+{
+ registers_changed_ptid (thread->ptid);
+}
+
void
registers_changed (void)
{
regnum, buf);
}
-/* Perform a partial register transfer using a read, modify, write
- operation. */
+/* See regcache.h. */
enum register_status
-readable_regcache::read_part (int regnum, int offset, int len, void *in,
- bool is_raw)
+readable_regcache::read_part (int regnum, int offset, int len,
+ gdb_byte *out, bool is_raw)
{
- struct gdbarch *gdbarch = arch ();
- gdb_byte *reg = (gdb_byte *) alloca (register_size (gdbarch, regnum));
+ int reg_size = register_size (arch (), regnum);
+
+ gdb_assert (out != NULL);
+ gdb_assert (offset >= 0 && offset <= reg_size);
+ gdb_assert (len >= 0 && offset + len <= reg_size);
+
+ if (offset == 0 && len == 0)
+ {
+ /* Nothing to do. */
+ return REG_VALID;
+ }
+
+ if (offset == 0 && len == reg_size)
+ {
+ /* Read the full register. */
+ return (is_raw) ? raw_read (regnum, out) : cooked_read (regnum, out);
+ }
- gdb_assert (in != NULL);
- gdb_assert (offset >= 0 && offset <= m_descr->sizeof_register[regnum]);
- gdb_assert (len >= 0 && offset + len <= m_descr->sizeof_register[regnum]);
- /* Something to do? */
- if (offset + len == 0)
- return REG_VALID;
- /* Read (when needed) ... */
enum register_status status;
+ gdb_byte *reg = (gdb_byte *) alloca (reg_size);
- if (is_raw)
- status = raw_read (regnum, reg);
- else
- status = cooked_read (regnum, reg);
+ /* Read full register to buffer. */
+ status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg);
if (status != REG_VALID)
return status;
- /* ... modify ... */
- memcpy (in, reg + offset, len);
-
+ /* Copy out. */
+ memcpy (out, reg + offset, len);
return REG_VALID;
}
+/* See regcache.h. */
+
+void
+reg_buffer::raw_collect_part (int regnum, int offset, int len,
+ gdb_byte *out) const
+{
+ int reg_size = register_size (arch (), regnum);
+
+ gdb_assert (out != nullptr);
+ gdb_assert (offset >= 0 && offset <= reg_size);
+ gdb_assert (len >= 0 && offset + len <= reg_size);
+
+ if (offset == 0 && len == 0)
+ {
+ /* Nothing to do. */
+ return;
+ }
+
+ if (offset == 0 && len == reg_size)
+ {
+ /* Collect the full register. */
+ return raw_collect (regnum, out);
+ }
+
+ /* Read to buffer, then write out. */
+ gdb_byte *reg = (gdb_byte *) alloca (reg_size);
+ raw_collect (regnum, reg);
+ memcpy (out, reg + offset, len);
+}
+
+/* See regcache.h. */
+
enum register_status
regcache::write_part (int regnum, int offset, int len,
- const void *out, bool is_raw)
+ const gdb_byte *in, bool is_raw)
{
- struct gdbarch *gdbarch = arch ();
- gdb_byte *reg = (gdb_byte *) alloca (register_size (gdbarch, regnum));
+ int reg_size = register_size (arch (), regnum);
- gdb_assert (out != NULL);
- gdb_assert (offset >= 0 && offset <= m_descr->sizeof_register[regnum]);
- gdb_assert (len >= 0 && offset + len <= m_descr->sizeof_register[regnum]);
- /* Something to do? */
- if (offset + len == 0)
- return REG_VALID;
- /* Read (when needed) ... */
- if (offset > 0
- || offset + len < m_descr->sizeof_register[regnum])
+ gdb_assert (in != NULL);
+ gdb_assert (offset >= 0 && offset <= reg_size);
+ gdb_assert (len >= 0 && offset + len <= reg_size);
+
+ if (offset == 0 && len == 0)
{
- enum register_status status;
+ /* Nothing to do. */
+ return REG_VALID;
+ }
- if (is_raw)
- status = raw_read (regnum, reg);
- else
- status = cooked_read (regnum, reg);
- if (status != REG_VALID)
- return status;
+ if (offset == 0 && len == reg_size)
+ {
+ /* Write the full register. */
+ (is_raw) ? raw_write (regnum, in) : cooked_write (regnum, in);
+ return REG_VALID;
}
- memcpy (reg + offset, out, len);
- /* ... write (when needed). */
- if (is_raw)
- raw_write (regnum, reg);
- else
- cooked_write (regnum, reg);
+ enum register_status status;
+ gdb_byte *reg = (gdb_byte *) alloca (reg_size);
+ /* Read existing register to buffer. */
+ status = (is_raw) ? raw_read (regnum, reg) : cooked_read (regnum, reg);
+ if (status != REG_VALID)
+ return status;
+
+ /* Update buffer, then write back to regcache. */
+ memcpy (reg + offset, in, len);
+ is_raw ? raw_write (regnum, reg) : cooked_write (regnum, reg);
return REG_VALID;
}
+/* See regcache.h. */
+
+void
+reg_buffer::raw_supply_part (int regnum, int offset, int len,
+ const gdb_byte *in)
+{
+ int reg_size = register_size (arch (), regnum);
+
+ gdb_assert (in != nullptr);
+ gdb_assert (offset >= 0 && offset <= reg_size);
+ gdb_assert (len >= 0 && offset + len <= reg_size);
+
+ if (offset == 0 && len == 0)
+ {
+ /* Nothing to do. */
+ return;
+ }
+
+ if (offset == 0 && len == reg_size)
+ {
+ /* Supply the full register. */
+ return raw_supply (regnum, in);
+ }
+
+ gdb_byte *reg = (gdb_byte *) alloca (reg_size);
+
+ /* Read existing value to buffer. */
+ raw_collect (regnum, reg);
+
+ /* Write to buffer, then write out. */
+ memcpy (reg + offset, in, len);
+ raw_supply (regnum, reg);
+}
+
enum register_status
-readable_regcache::raw_read_part (int regnum, int offset, int len, gdb_byte *buf)
+readable_regcache::raw_read_part (int regnum, int offset, int len,
+ gdb_byte *buf)
{
assert_regnum (regnum);
return read_part (regnum, offset, len, buf, true);
write_part (regnum, offset, len, buf, true);
}
+/* See regcache.h. */
+
enum register_status
readable_regcache::cooked_read_part (int regnum, int offset, int len,
gdb_byte *buf)
return read_part (regnum, offset, len, buf, false);
}
+/* See regcache.h. */
+
void
regcache::cooked_write_part (int regnum, int offset, int len,
const gdb_byte *buf)
byte_order);
}
-/* 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. */
+/* See regcache.h. */
+
+void
+regcache::transfer_regset_register (struct regcache *out_regcache, int regnum,
+ const gdb_byte *in_buf, gdb_byte *out_buf,
+ int slot_size, int offs) const
+{
+ struct gdbarch *gdbarch = arch ();
+ int reg_size = std::min (register_size (gdbarch, regnum), slot_size);
+
+ /* Use part versions and reg_size to prevent possible buffer overflows when
+ accessing the regcache. */
+
+ if (out_buf != nullptr)
+ {
+ raw_collect_part (regnum, 0, reg_size, out_buf + offs);
+
+ /* Ensure any additional space is cleared. */
+ if (slot_size > reg_size)
+ memset (out_buf + offs + reg_size, 0, slot_size - reg_size);
+ }
+ else if (in_buf != nullptr)
+ out_regcache->raw_supply_part (regnum, 0, reg_size, in_buf + offs);
+ else
+ {
+ /* Invalidate the register. */
+ out_regcache->raw_supply (regnum, nullptr);
+ }
+}
+
+/* See regcache.h. */
void
regcache::transfer_regset (const struct regset *regset,
struct regcache *out_regcache,
- int regnum, const void *in_buf,
- void *out_buf, size_t size) const
+ int regnum, const gdb_byte *in_buf,
+ gdb_byte *out_buf, size_t size) const
{
const struct regcache_map_entry *map;
int offs = 0, count;
if (offs + slot_size > size)
break;
- if (out_buf)
- raw_collect (regno, (gdb_byte *) out_buf + offs);
- else
- out_regcache->raw_supply (regno, in_buf
- ? (const gdb_byte *) in_buf + offs
- : NULL);
+ transfer_regset_register (out_regcache, regno, in_buf, out_buf,
+ slot_size, offs);
}
else
{
if (offs + slot_size > size)
return;
- if (out_buf)
- raw_collect (regnum, (gdb_byte *) out_buf + offs);
- else
- out_regcache->raw_supply (regnum, in_buf
- ? (const gdb_byte *) in_buf + offs
- : NULL);
+ transfer_regset_register (out_regcache, regnum, in_buf, out_buf,
+ slot_size, offs);
return;
}
}
struct regcache *regcache,
int regnum, const void *buf, size_t size)
{
- regcache->supply_regset (regset, regnum, buf, size);
+ regcache->supply_regset (regset, regnum, (const gdb_byte *) buf, size);
}
void
regcache::supply_regset (const struct regset *regset,
int regnum, const void *buf, size_t size)
{
- transfer_regset (regset, this, regnum, buf, NULL, size);
+ transfer_regset (regset, this, regnum, (const gdb_byte *) buf, nullptr, size);
}
/* Collect register REGNUM from REGCACHE to BUF, using the register
const struct regcache *regcache,
int regnum, void *buf, size_t size)
{
- regcache->collect_regset (regset, regnum, buf, size);
+ regcache->collect_regset (regset, regnum, (gdb_byte *) buf, size);
}
void
regcache::collect_regset (const struct regset *regset,
int regnum, void *buf, size_t size) const
{
- transfer_regset (regset, NULL, regnum, NULL, buf, size);
+ transfer_regset (regset, nullptr, regnum, nullptr, (gdb_byte *) buf, size);
}
+/* See common/common-regcache.h. */
+
+bool
+reg_buffer::raw_compare (int regnum, const void *buf, int offset) const
+{
+ gdb_assert (buf != NULL);
+ assert_regnum (regnum);
+
+ const char *regbuf = (const char *) register_buffer (regnum);
+ size_t size = m_descr->sizeof_register[regnum];
+ gdb_assert (size >= offset);
+
+ return (memcmp (buf, regbuf + offset, size - offset) == 0);
+}
/* Special handling for register PC. */
projects / deliverable / binutils-gdb.git / blobdiff