diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c
index df67e12..90ee204 100644
--- a/gdb/aarch64-tdep.c
+++ b/gdb/aarch64-tdep.c
@@ -1161,7 +1161,7 @@ aarch64_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
 typedef struct
 {
   /* Value to pass on stack.  */
-  const void *data;
+  const gdb_byte *data;

   /* Size in bytes of value to pass on stack.  */
   int len;
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index 4c99ddf..249e1d1 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -3398,7 +3398,7 @@ struct stack_item
 {
   int len;
   struct stack_item *prev;
-  void *data;
+  gdb_byte *data;
 };

 static struct stack_item *
@@ -3406,7 +3406,7 @@ push_stack_item (struct stack_item *prev, const void *contents, int len)
 {
   struct stack_item *si;
   si = XNEW (struct stack_item);
-  si->data = xmalloc (len);
+  si->data = (gdb_byte *) xmalloc (len);
   si->len = len;
   si->prev = prev;
   memcpy (si->data, contents, len);
diff --git a/gdb/avr-tdep.c b/gdb/avr-tdep.c
index 4fcae53..1108eb4 100644
--- a/gdb/avr-tdep.c
+++ b/gdb/avr-tdep.c
@@ -1198,7 +1198,7 @@ struct stack_item
 {
   int len;
   struct stack_item *prev;
-  void *data;
+  gdb_byte *data;
 };

 static struct stack_item *
@@ -1206,7 +1206,7 @@ push_stack_item (struct stack_item *prev, const bfd_byte *contents, int len)
 {
   struct stack_item *si;
   si = XNEW (struct stack_item);
-  si->data = xmalloc (len);
+  si->data = (gdb_byte *) xmalloc (len);
   si->len = len;
   si->prev = prev;
   memcpy (si->data, contents, len);
diff --git a/gdb/cli/cli-dump.c b/gdb/cli/cli-dump.c
index a434ac1..2dcb9c3 100644
--- a/gdb/cli/cli-dump.c
+++ b/gdb/cli/cli-dump.c
@@ -212,7 +212,7 @@ dump_memory_to_file (const char *cmd, const char *mode, const char *file_format)
   CORE_ADDR hi;
   ULONGEST count;
   const char *filename;
-  void *buf;
+  gdb_byte *buf;
   const char *lo_exp;
   const char *hi_exp;

@@ -237,7 +237,7 @@ dump_memory_to_file (const char *cmd, const char *mode, const char *file_format)

   /* FIXME: Should use read_memory_partial() and a magic blocking
      value.  */
-  buf = xmalloc (count);
+  buf = (gdb_byte *) xmalloc (count);
   make_cleanup (xfree, buf);
   read_memory (lo, buf, count);

diff --git a/gdb/cris-tdep.c b/gdb/cris-tdep.c
index 73e4048..adb7221 100644
--- a/gdb/cris-tdep.c
+++ b/gdb/cris-tdep.c
@@ -665,14 +665,14 @@ struct stack_item
 {
   int len;
   struct stack_item *prev;
-  void *data;
+  gdb_byte *data;
 };

 static struct stack_item *
 push_stack_item (struct stack_item *prev, const gdb_byte *contents, int len)
 {
   struct stack_item *si = XNEW (struct stack_item);
-  si->data = xmalloc (len);
+  si->data = (gdb_byte *) xmalloc (len);
   si->len = len;
   si->prev = prev;
   memcpy (si->data, contents, len);
diff --git a/gdb/gcore.c b/gdb/gcore.c
index a883e89..04007ae 100644
--- a/gdb/gcore.c
+++ b/gdb/gcore.c
@@ -562,7 +562,7 @@ gcore_copy_callback (bfd *obfd, asection *osec, void *ignored)
   bfd_size_type size, total_size = bfd_section_size (obfd, osec);
   file_ptr offset = 0;
   struct cleanup *old_chain = NULL;
-  void *memhunk;
+  gdb_byte *memhunk;

   /* Read-only sections are marked; we don't have to copy their contents.  */
   if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0)
@@ -573,7 +573,7 @@ gcore_copy_callback (bfd *obfd, asection *osec, void *ignored)
     return;

   size = min (total_size, MAX_COPY_BYTES);
-  memhunk = xmalloc (size);
+  memhunk = (gdb_byte *) xmalloc (size);
   old_chain = make_cleanup (xfree, memhunk);

   while (total_size > 0)
diff --git a/gdb/gdbtypes.h b/gdb/gdbtypes.h
index 29eec99..9c64569 100644
--- a/gdb/gdbtypes.h
+++ b/gdb/gdbtypes.h
@@ -1904,7 +1904,7 @@ extern int field_is_static (struct field *);

 /* printcmd.c */

-extern void print_scalar_formatted (const void *, struct type *,
+extern void print_scalar_formatted (const gdb_byte *, struct type *,
 				    const struct value_print_options *,
 				    int, struct ui_file *);

diff --git a/gdb/h8300-tdep.c b/gdb/h8300-tdep.c
index f4b97c1..5bdc159 100644
--- a/gdb/h8300-tdep.c
+++ b/gdb/h8300-tdep.c
@@ -742,7 +742,7 @@ h8300_push_dummy_call (struct gdbarch *gdbarch, struct value *function,

 static void
 h8300_extract_return_value (struct type *type, struct regcache *regcache,
-			    void *valbuf)
+			    gdb_byte *valbuf)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
@@ -760,7 +760,7 @@ h8300_extract_return_value (struct type *type, struct regcache *regcache,
       regcache_cooked_read_unsigned (regcache, E_RET0_REGNUM, &c);
       store_unsigned_integer (valbuf, 2, byte_order, c);
       regcache_cooked_read_unsigned (regcache, E_RET1_REGNUM, &c);
-      store_unsigned_integer ((void *)((char *) valbuf + 2), 2, byte_order, c);
+      store_unsigned_integer (valbuf + 2, 2, byte_order, c);
       break;
     case 8:			/* long long is now 8 bytes.  */
       if (TYPE_CODE (type) == TYPE_CODE_INT)
@@ -779,7 +779,7 @@ h8300_extract_return_value (struct type *type, struct regcache *regcache,

 static void
 h8300h_extract_return_value (struct type *type, struct regcache *regcache,
-			     void *valbuf)
+			     gdb_byte *valbuf)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
@@ -799,8 +799,7 @@ h8300h_extract_return_value (struct type *type, struct regcache *regcache,
 	  regcache_cooked_read_unsigned (regcache, E_RET0_REGNUM, &c);
 	  store_unsigned_integer (valbuf, 4, byte_order, c);
 	  regcache_cooked_read_unsigned (regcache, E_RET1_REGNUM, &c);
-	  store_unsigned_integer ((void *) ((char *) valbuf + 4), 4,
-				  byte_order, c);
+	  store_unsigned_integer (valbuf + 4, 4, byte_order, c);
 	}
       else
 	{
@@ -845,7 +844,7 @@ h8300h_use_struct_convention (struct type *value_type)

 static void
 h8300_store_return_value (struct type *type, struct regcache *regcache,
-			  const void *valbuf)
+			  const gdb_byte *valbuf)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
@@ -874,7 +873,7 @@ h8300_store_return_value (struct type *type, struct regcache *regcache,

 static void
 h8300h_store_return_value (struct type *type, struct regcache *regcache,
-			   const void *valbuf)
+			   const gdb_byte *valbuf)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
diff --git a/gdb/iq2000-tdep.c b/gdb/iq2000-tdep.c
index efeb244..36f3e8d 100644
--- a/gdb/iq2000-tdep.c
+++ b/gdb/iq2000-tdep.c
@@ -537,7 +537,7 @@ iq2000_use_struct_convention (struct type *type)

 static void
 iq2000_extract_return_value (struct type *type, struct regcache *regcache,
-			     void *valbuf)
+			     gdb_byte *valbuf)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
@@ -564,7 +564,7 @@ iq2000_extract_return_value (struct type *type, struct regcache *regcache,
 	  regcache_cooked_read_unsigned (regcache, regno++, &tmp);
 	  store_unsigned_integer (valbuf, size, byte_order, tmp);
 	  len -= size;
-	  valbuf = ((char *) valbuf) + size;
+	  valbuf += size;
 	}
     }
   else
diff --git a/gdb/jit.c b/gdb/jit.c
index fbc0d02..7c267d7 100644
--- a/gdb/jit.c
+++ b/gdb/jit.c
@@ -819,7 +819,7 @@ static int
 jit_reader_try_read_symtab (struct jit_code_entry *code_entry,
                             CORE_ADDR entry_addr)
 {
-  void *gdb_mem;
+  gdb_byte *gdb_mem;
   int status;
   jit_dbg_reader_data priv_data;
   struct gdb_reader_funcs *funcs;
@@ -842,7 +842,7 @@ jit_reader_try_read_symtab (struct jit_code_entry *code_entry,
   if (!loaded_jit_reader)
     return 0;

-  gdb_mem = xmalloc (code_entry->symfile_size);
+  gdb_mem = (gdb_byte *) xmalloc (code_entry->symfile_size);

   status = 1;
   TRY
diff --git a/gdb/m32r-tdep.c b/gdb/m32r-tdep.c
index 9b89ad9..472e666 100644
--- a/gdb/m32r-tdep.c
+++ b/gdb/m32r-tdep.c
@@ -249,7 +249,7 @@ m32r_register_type (struct gdbarch *gdbarch, int reg_nr)

 static void
 m32r_store_return_value (struct type *type, struct regcache *regcache,
-			 const void *valbuf)
+			 const gdb_byte *valbuf)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
@@ -261,7 +261,7 @@ m32r_store_return_value (struct type *type, struct regcache *regcache,

   if (len > 4)
     {
-      regval = extract_unsigned_integer ((gdb_byte *) valbuf + 4,
+      regval = extract_unsigned_integer (valbuf + 4,
 					 len - 4, byte_order);
       regcache_cooked_write_unsigned (regcache, RET1_REGNUM + 1, regval);
     }
@@ -776,25 +776,24 @@ m32r_push_dummy_call (struct gdbarch *gdbarch, struct value *function,

 static void
 m32r_extract_return_value (struct type *type, struct regcache *regcache,
-			   void *dst)
+			   gdb_byte *dst)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-  bfd_byte *valbuf = dst;
   int len = TYPE_LENGTH (type);
   ULONGEST tmp;

   /* By using store_unsigned_integer we avoid having to do
      anything special for small big-endian values.  */
   regcache_cooked_read_unsigned (regcache, RET1_REGNUM, &tmp);
-  store_unsigned_integer (valbuf, (len > 4 ? len - 4 : len), byte_order, tmp);
+  store_unsigned_integer (dst, (len > 4 ? len - 4 : len), byte_order, tmp);

   /* Ignore return values more than 8 bytes in size because the m32r
      returns anything more than 8 bytes in the stack.  */
   if (len > 4)
     {
       regcache_cooked_read_unsigned (regcache, RET1_REGNUM + 1, &tmp);
-      store_unsigned_integer (valbuf + len - 4, 4, byte_order, tmp);
+      store_unsigned_integer (dst + len - 4, 4, byte_order, tmp);
     }
 }

diff --git a/gdb/mep-tdep.c b/gdb/mep-tdep.c
index b3c1f77..b6f242f 100644
--- a/gdb/mep-tdep.c
+++ b/gdb/mep-tdep.c
@@ -1126,7 +1126,7 @@ static enum register_status
 mep_pseudo_cr32_read (struct gdbarch *gdbarch,
                       struct regcache *regcache,
                       int cookednum,
-                      void *buf)
+                      gdb_byte *buf)
 {
   enum register_status status;
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
@@ -1152,7 +1152,7 @@ static enum register_status
 mep_pseudo_cr64_read (struct gdbarch *gdbarch,
                       struct regcache *regcache,
                       int cookednum,
-                      void *buf)
+                      gdb_byte *buf)
 {
   return regcache_raw_read (regcache, mep_pseudo_to_raw[cookednum], buf);
 }
@@ -1182,7 +1182,7 @@ static void
 mep_pseudo_csr_write (struct gdbarch *gdbarch,
                       struct regcache *regcache,
                       int cookednum,
-                      const void *buf)
+                      const gdb_byte *buf)
 {
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   int size = register_size (gdbarch, cookednum);
@@ -1213,7 +1213,7 @@ static void
 mep_pseudo_cr32_write (struct gdbarch *gdbarch,
                        struct regcache *regcache,
                        int cookednum,
-                       const void *buf)
+                       const gdb_byte *buf)
 {
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   /* Expand the 32-bit value into a 64-bit value, and write that to
@@ -1234,7 +1234,7 @@ static void
 mep_pseudo_cr64_write (struct gdbarch *gdbarch,
                      struct regcache *regcache,
                      int cookednum,
-                     const void *buf)
+                     const gdb_byte *buf)
 {
   regcache_raw_write (regcache, mep_pseudo_to_raw[cookednum], buf);
 }
diff --git a/gdb/mi/mi-main.c b/gdb/mi/mi-main.c
index 3ad11bb..2b25a9c 100644
--- a/gdb/mi/mi-main.c
+++ b/gdb/mi/mi-main.c
@@ -1696,7 +1696,7 @@ mi_cmd_data_write_memory (char *command, char **argv, int argc)
   /* FIXME: ezannoni 2000-02-17 LONGEST could possibly not be big
      enough when using a compiler other than GCC.  */
   LONGEST value;
-  void *buffer;
+  gdb_byte *buffer;
   struct cleanup *old_chain;
   long offset = 0;
   int oind = 0;
@@ -1744,7 +1744,7 @@ mi_cmd_data_write_memory (char *command, char **argv, int argc)
   /* Get the value as a number.  */
   value = parse_and_eval_address (argv[3]);
   /* Get the value into an array.  */
-  buffer = xmalloc (word_size);
+  buffer = (gdb_byte *) xmalloc (word_size);
   old_chain = make_cleanup (xfree, buffer);
   store_signed_integer (buffer, word_size, byte_order, value);
   /* Write it down to memory.  */
diff --git a/gdb/moxie-tdep.c b/gdb/moxie-tdep.c
index 3236012..49e8410 100644
--- a/gdb/moxie-tdep.c
+++ b/gdb/moxie-tdep.c
@@ -117,7 +117,7 @@ moxie_register_type (struct gdbarch *gdbarch, int reg_nr)

 static void
 moxie_store_return_value (struct type *type, struct regcache *regcache,
-			 const void *valbuf)
+			 const gdb_byte *valbuf)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
@@ -129,8 +129,7 @@ moxie_store_return_value (struct type *type, struct regcache *regcache,
   regcache_cooked_write_unsigned (regcache, RET1_REGNUM, regval);
   if (len > 4)
     {
-      regval = extract_unsigned_integer ((gdb_byte *) valbuf + 4,
-					 len - 4, byte_order);
+      regval = extract_unsigned_integer (valbuf + 4, len - 4, byte_order);
       regcache_cooked_write_unsigned (regcache, RET1_REGNUM + 1, regval);
     }
 }
@@ -499,25 +498,24 @@ moxie_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)

 static void
 moxie_extract_return_value (struct type *type, struct regcache *regcache,
-			   void *dst)
+			    gdb_byte *dst)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-  bfd_byte *valbuf = dst;
   int len = TYPE_LENGTH (type);
   ULONGEST tmp;

   /* By using store_unsigned_integer we avoid having to do
      anything special for small big-endian values.  */
   regcache_cooked_read_unsigned (regcache, RET1_REGNUM, &tmp);
-  store_unsigned_integer (valbuf, (len > 4 ? len - 4 : len), byte_order, tmp);
+  store_unsigned_integer (dst, (len > 4 ? len - 4 : len), byte_order, tmp);

   /* Ignore return values more than 8 bytes in size because the moxie
      returns anything more than 8 bytes in the stack.  */
   if (len > 4)
     {
       regcache_cooked_read_unsigned (regcache, RET1_REGNUM + 1, &tmp);
-      store_unsigned_integer (valbuf + len - 4, 4, byte_order, tmp);
+      store_unsigned_integer (dst + len - 4, 4, byte_order, tmp);
     }
 }

diff --git a/gdb/p-valprint.c b/gdb/p-valprint.c
index 4e1c812..120035a 100644
--- a/gdb/p-valprint.c
+++ b/gdb/p-valprint.c
@@ -203,11 +203,11 @@ pascal_val_print (struct type *type, const gdb_byte *valaddr,
 	  && addr != 0)
 	{
 	  ULONGEST string_length;
-	  void *buffer;
+	  gdb_byte *buffer;

 	  if (want_space)
 	    fputs_filtered (" ", stream);
-	  buffer = xmalloc (length_size);
+	  buffer = (gdb_byte *) xmalloc (length_size);
 	  read_memory (addr + length_pos, buffer, length_size);
 	  string_length = extract_unsigned_integer (buffer, length_size,
 						    byte_order);
diff --git a/gdb/printcmd.c b/gdb/printcmd.c
index 5dddf4e..1744abd 100644
--- a/gdb/printcmd.c
+++ b/gdb/printcmd.c
@@ -346,7 +346,7 @@ float_type_from_length (struct type *type)
    supported at this level.  */

 void
-print_scalar_formatted (const void *valaddr, struct type *type,
+print_scalar_formatted (const gdb_byte *valaddr, struct type *type,
 			const struct value_print_options *options,
 			int size, struct ui_file *stream)
 {
diff --git a/gdb/python/py-inferior.c b/gdb/python/py-inferior.c
index dbc197e..c506ccd 100644
--- a/gdb/python/py-inferior.c
+++ b/gdb/python/py-inferior.c
@@ -505,7 +505,7 @@ static PyObject *
 infpy_read_memory (PyObject *self, PyObject *args, PyObject *kw)
 {
   CORE_ADDR addr, length;
-  void *buffer = NULL;
+  gdb_byte *buffer = NULL;
   membuf_object *membuf_obj;
   PyObject *addr_obj, *length_obj, *result;
   static char *keywords[] = { "address", "length", NULL };
@@ -520,7 +520,7 @@ infpy_read_memory (PyObject *self, PyObject *args, PyObject *kw)

   TRY
     {
-      buffer = xmalloc (length);
+      buffer = (gdb_byte *) xmalloc (length);

       read_memory (addr, buffer, length);
     }
@@ -564,7 +564,7 @@ infpy_write_memory (PyObject *self, PyObject *args, PyObject *kw)
 {
   struct gdb_exception except = exception_none;
   Py_ssize_t buf_len;
-  const char *buffer;
+  const gdb_byte *buffer;
   CORE_ADDR addr, length;
   PyObject *addr_obj, *length_obj = NULL;
   static char *keywords[] = { "address", "buffer", "length", NULL };
@@ -576,13 +576,17 @@ infpy_write_memory (PyObject *self, PyObject *args, PyObject *kw)
 				     &length_obj))
     return NULL;

-  buffer = pybuf.buf;
+  buffer = (const gdb_byte *) pybuf.buf;
   buf_len = pybuf.len;
 #else
+  const void *vbuffer;
+
   if (! PyArg_ParseTupleAndKeywords (args, kw, "Os#|O", keywords,
 				     &addr_obj, &buffer, &buf_len,
 				     &length_obj))
     return NULL;
+
+  buffer = (const gdb_byte *) buffer;
 #endif

   if (get_addr_from_python (addr_obj, &addr) < 0)
@@ -595,7 +599,7 @@ infpy_write_memory (PyObject *self, PyObject *args, PyObject *kw)

   TRY
     {
-      write_memory_with_notification (addr, (gdb_byte *) buffer, length);
+      write_memory_with_notification (addr, buffer, length);
     }
   CATCH (ex, RETURN_MASK_ALL)
     {
@@ -717,7 +721,7 @@ infpy_search_memory (PyObject *self, PyObject *args, PyObject *kw)
   static char *keywords[] = { "address", "length", "pattern", NULL };
   PyObject *start_addr_obj, *length_obj;
   Py_ssize_t pattern_size;
-  const void *buffer;
+  const gdb_byte *buffer;
   CORE_ADDR found_addr;
   int found = 0;
 #ifdef IS_PY3K
@@ -728,10 +732,11 @@ infpy_search_memory (PyObject *self, PyObject *args, PyObject *kw)
 				     &pybuf))
     return NULL;

-  buffer = pybuf.buf;
+  buffer = (const gdb_byte *) pybuf.buf;
   pattern_size = pybuf.len;
 #else
   PyObject *pattern;
+  const void *vbuffer;

   if (! PyArg_ParseTupleAndKeywords (args, kw, "OOO", keywords,
  				     &start_addr_obj, &length_obj,
@@ -746,8 +751,10 @@ infpy_search_memory (PyObject *self, PyObject *args, PyObject *kw)
       return NULL;
     }

-  if (PyObject_AsReadBuffer (pattern, &buffer, &pattern_size) == -1)
+  if (PyObject_AsReadBuffer (pattern, &vbuffer, &pattern_size) == -1)
     return NULL;
+
+  buffer = (const gdb_byte *) vbuffer;
 #endif

   if (get_addr_from_python (start_addr_obj, &start_addr) < 0)
diff --git a/gdb/regcache.c b/gdb/regcache.c
index 41c7aca..74d883a 100644
--- a/gdb/regcache.c
+++ b/gdb/regcache.c
@@ -710,11 +710,11 @@ regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
 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);
@@ -724,11 +724,11 @@ void
 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);
@@ -858,11 +858,11 @@ void
 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);
@@ -872,11 +872,11 @@ void
 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);
diff --git a/gdb/sh64-tdep.c b/gdb/sh64-tdep.c
index f76c845..f751b29 100644
--- a/gdb/sh64-tdep.c
+++ b/gdb/sh64-tdep.c
@@ -1222,7 +1222,7 @@ sh64_push_dummy_call (struct gdbarch *gdbarch,
    TYPE, and copy that, in virtual format, into VALBUF.  */
 static void
 sh64_extract_return_value (struct type *type, struct regcache *regcache,
-			   void *valbuf)
+			   gdb_byte *valbuf)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
