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commit 23f945bf8cebf348154aff43782de2e1977e9230
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Author: Andreas Arnez <arnez@linux.vnet.ibm.com>
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Date: Tue Jun 13 15:20:31 2017 +0200
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Fix bit-/byte-offset mismatch in parameter to read_value_memory
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The function read_value_memory accepts a parameter embedded_offset and
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expects it to represent the byte offset into the given value. However,
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the only invocation with a possibly non-zero embedded_offset happens in
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read_pieced_value, where a bit offset is passed instead.
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Adjust the implementation of read_value_memory to meet the caller's
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expectation. This implicitly fixes the invocation in read_pieced_value.
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gdb/ChangeLog:
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* valops.c (read_value_memory): Change embedded_offset to
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represent a bit offset instead of a byte offset.
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* value.h (read_value_memory): Adjust comment.
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### a/gdb/ChangeLog
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### b/gdb/ChangeLog
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## -1,5 +1,11 @@
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2017-06-13 Andreas Arnez <arnez@linux.vnet.ibm.com>
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+ * valops.c (read_value_memory): Change embedded_offset to
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+ represent a bit offset instead of a byte offset.
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+ * value.h (read_value_memory): Adjust comment.
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+
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+2017-06-13 Andreas Arnez <arnez@linux.vnet.ibm.com>
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+
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* dwarf2loc.c (read_pieced_value): Remove unnecessary variables
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dest_offset_bits and source_offset_bits.
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(write_pieced_value): Likewise.
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--- a/gdb/valops.c
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+++ b/gdb/valops.c
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@@ -958,7 +958,7 @@ value_at_lazy (struct type *type, CORE_ADDR addr)
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}
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void
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-read_value_memory (struct value *val, LONGEST embedded_offset,
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+read_value_memory (struct value *val, LONGEST bit_offset,
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int stack, CORE_ADDR memaddr,
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gdb_byte *buffer, size_t length)
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{
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@@ -984,8 +984,9 @@ read_value_memory (struct value *val, LONGEST embedded_offset,
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if (status == TARGET_XFER_OK)
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/* nothing */;
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else if (status == TARGET_XFER_UNAVAILABLE)
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- mark_value_bytes_unavailable (val, embedded_offset + xfered_total,
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- xfered_partial);
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+ mark_value_bits_unavailable (val, (xfered_total * HOST_CHAR_BIT
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+ + bit_offset),
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+ xfered_partial * HOST_CHAR_BIT);
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else if (status == TARGET_XFER_EOF)
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memory_error (TARGET_XFER_E_IO, memaddr + xfered_total);
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else
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--- a/gdb/value.h
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+++ b/gdb/value.h
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@@ -581,12 +581,11 @@ extern int value_contents_eq (const struct value *val1, LONGEST offset1,
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/* Read LENGTH addressable memory units starting at MEMADDR into BUFFER,
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which is (or will be copied to) VAL's contents buffer offset by
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- EMBEDDED_OFFSET (that is, to &VAL->contents[EMBEDDED_OFFSET]).
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- Marks value contents ranges as unavailable if the corresponding
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- memory is likewise unavailable. STACK indicates whether the memory
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- is known to be stack memory. */
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+ BIT_OFFSET bits. Marks value contents ranges as unavailable if
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+ the corresponding memory is likewise unavailable. STACK indicates
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+ whether the memory is known to be stack memory. */
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-extern void read_value_memory (struct value *val, LONGEST embedded_offset,
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+extern void read_value_memory (struct value *val, LONGEST bit_offset,
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int stack, CORE_ADDR memaddr,
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gdb_byte *buffer, size_t length);
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