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authorJim Blandy <jimb@codesourcery.com>2007-12-17 18:38:30 +0000
committerJim Blandy <jimb@codesourcery.com>2007-12-17 18:38:30 +0000
commitc6a0999f0fcb83bda7db3c75a1970b5cfd82c6dd (patch)
tree81677d3dacddbba14fe502c4224aaad6865837c2 /gdb
parent9544c605b634aa6fd72e24537c327dcce5f3a306 (diff)
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* dwarf2read.c (dwarf2_add_field): Correctly scale all byte
offsets obtained from DW_AT_data_member_location before recording them in FIELD_BITPOS (*fp). * dwarf2read.c (attr_form_is_section_offset): Doc fixes.
Diffstat (limited to 'gdb')
-rw-r--r--gdb/ChangeLog8
-rw-r--r--gdb/dwarf2read.c22
2 files changed, 23 insertions, 7 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b5ba6da..6d56bbc 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,11 @@
+2007-12-17 Jim Blandy <jimb@codesourcery.com>
+
+ * dwarf2read.c (dwarf2_add_field): Correctly scale all byte
+ offsets obtained from DW_AT_data_member_location before recording
+ them in FIELD_BITPOS (*fp).
+
+ * dwarf2read.c (attr_form_is_section_offset): Doc fixes.
+
2007-12-17 Nigel Stephens <nigel@mips.com>
Maciej W. Rozycki <macro@mips.com>
diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 542fe34..e32e067 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -3478,16 +3478,19 @@ dwarf2_add_field (struct field_info *fip, struct die_info *die,
attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
if (attr)
{
+ int byte_offset;
+
if (attr_form_is_section_offset (attr))
{
dwarf2_complex_location_expr_complaint ();
- FIELD_BITPOS (*fp) = 0;
+ byte_offset = 0;
}
else if (attr_form_is_constant (attr))
- FIELD_BITPOS (*fp) = dwarf2_get_attr_constant_value (attr, 0);
+ byte_offset = dwarf2_get_attr_constant_value (attr, 0);
else
- FIELD_BITPOS (*fp) =
- decode_locdesc (DW_BLOCK (attr), cu) * bits_per_byte;
+ byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
+
+ FIELD_BITPOS (*fp) = byte_offset * bits_per_byte;
}
else
FIELD_BITPOS (*fp) = 0;
@@ -9734,9 +9737,14 @@ attr_form_is_block (struct attribute *attr)
|| attr->form == DW_FORM_block);
}
-/* Return non-zero if ATTR's value is a section offset (classes
- lineptr, loclistptr, macptr or rangelistptr). In this case,
- you may use DW_UNSND (attr) to retrieve the offset. */
+/* Return non-zero if ATTR's value is a section offset --- classes
+ lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
+ You may use DW_UNSND (attr) to retrieve such offsets.
+
+ Section 7.5.4, "Attribute Encodings", explains that no attribute
+ may have a value that belongs to more than one of these classes; it
+ would be ambiguous if we did, because we use the same forms for all
+ of them. */
static int
attr_form_is_section_offset (struct attribute *attr)
{