diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 6ca4b5ccca..b4a9943ab9 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2017-06-13  Andreas Arnez  <arnez@linux.vnet.ibm.com>
+
+	* valops.c (read_value_memory): Change embedded_offset to
+	represent a bit offset instead of a byte offset.
+	* value.h (read_value_memory): Adjust comment.
+
 2017-06-13  Andreas Arnez  <arnez@linux.vnet.ibm.com>
 
 	* dwarf2loc.c (read_pieced_value): Remove unnecessary variables
diff --git a/gdb/valops.c b/gdb/valops.c
index 93ae6cf807..8675e6c00e 100644
--- a/gdb/valops.c
+++ b/gdb/valops.c
@@ -958,7 +958,7 @@ value_at_lazy (struct type *type, CORE_ADDR addr)
 }
 
 void
-read_value_memory (struct value *val, LONGEST embedded_offset,
+read_value_memory (struct value *val, LONGEST bit_offset,
 		   int stack, CORE_ADDR memaddr,
 		   gdb_byte *buffer, size_t length)
 {
@@ -984,8 +984,9 @@ read_value_memory (struct value *val, LONGEST embedded_offset,
       if (status == TARGET_XFER_OK)
 	/* nothing */;
       else if (status == TARGET_XFER_UNAVAILABLE)
-	mark_value_bytes_unavailable (val, embedded_offset + xfered_total,
-				      xfered_partial);
+	mark_value_bits_unavailable (val, (xfered_total * HOST_CHAR_BIT
+					   + bit_offset),
+				     xfered_partial * HOST_CHAR_BIT);
       else if (status == TARGET_XFER_EOF)
 	memory_error (TARGET_XFER_E_IO, memaddr + xfered_total);
       else
diff --git a/gdb/value.h b/gdb/value.h
index a1d1609777..fb7f13d294 100644
--- a/gdb/value.h
+++ b/gdb/value.h
@@ -581,12 +581,11 @@ extern int value_contents_eq (const struct value *val1, LONGEST offset1,
 
 /* Read LENGTH addressable memory units starting at MEMADDR into BUFFER,
    which is (or will be copied to) VAL's contents buffer offset by
-   EMBEDDED_OFFSET (that is, to &VAL->contents[EMBEDDED_OFFSET]).
-   Marks value contents ranges as unavailable if the corresponding
-   memory is likewise unavailable.  STACK indicates whether the memory
-   is known to be stack memory.  */
+   BIT_OFFSET bits.  Marks value contents ranges as unavailable if
+   the corresponding memory is likewise unavailable.  STACK indicates
+   whether the memory is known to be stack memory.  */
 
-extern void read_value_memory (struct value *val, LONGEST embedded_offset,
+extern void read_value_memory (struct value *val, LONGEST bit_offset,
 			       int stack, CORE_ADDR memaddr,
 			       gdb_byte *buffer, size_t length);