mirror of
https://github.com/openharmony/third_party_elfutils.git
synced 2026-07-01 06:41:51 -04:00
Petr Machata
1e2c886bb2
The function dwarf_formsdata is used for decoding signed values, but except for the variable-length DW_FORM_sdata, it uses unsigned primitives to decode the value. This is not a problem for 64-bit values, but the smaller values come decoded wrong. Fix by changing to signed primitives for decoding the fixed-length forms. Add a test case that uses dwarf_aggregate_size to determine an array size whose lower bound is -1, encoded using DW_FORM_data1, and upper bound 255 with DW_FORM_data2. When the -1 is decoded wrongly, it comes back as 255, and the array size is 1. The correct array size should be 257. Signed-off-by: Petr Machata <pmachata@gmail.com>
78 lines
3.6 KiB
ArmAsm
78 lines
3.6 KiB
ArmAsm
.section .debug_info
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.Lcu1_begin:
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.4byte .Lcu1_end - .Lcu1_start
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.Lcu1_start:
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.2byte 4 /* Version */
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.4byte .Labbrev1_begin /* Abbrevs */
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.byte 8 /* Pointer size */
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.uleb128 2 /* Abbrev (DW_TAG_compile_unit) */
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.uleb128 3 /* Abbrev (DW_TAG_variable) */
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.ascii "v\0"
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.4byte .Llabel1 - .Lcu1_begin
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.Llabel1:
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.uleb128 4 /* Abbrev (DW_TAG_array_type) */
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.4byte .Llabel2 - .Lcu1_begin
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.uleb128 5 /* Abbrev (DW_TAG_subrange_type) */
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.byte -1
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.2byte 255
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.byte 0x0 /* Terminate children */
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.Llabel2:
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.uleb128 6 /* Abbrev (DW_TAG_base_type) */
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.byte 1
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.byte 0x0 /* Terminate children */
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.Lcu1_end:
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.section .note.gnu.build-id, "a", %note
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.4byte 4
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.4byte 8
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.4byte 3
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.ascii "GNU\0"
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.byte 0x01
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.byte 0x02
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.byte 0x03
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.byte 0x04
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.byte 0x05
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.byte 0x06
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.byte 0x07
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.byte 0x08
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.section .debug_abbrev
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.Labbrev1_begin:
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.uleb128 2 /* Abbrev start */
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.uleb128 0x11 /* DW_TAG_compile_unit */
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.byte 1 /* has_children */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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.uleb128 3 /* Abbrev start */
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.uleb128 0x34 /* DW_TAG_variable */
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.byte 0 /* has_children */
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.uleb128 0x03 /* DW_AT_name */
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.uleb128 0x08 /* DW_FORM_string */
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.uleb128 0x49 /* DW_AT_type */
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.uleb128 0x13 /* DW_FORM_ref4 */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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.uleb128 4 /* Abbrev start */
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.uleb128 0x01 /* DW_TAG_array_type */
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.byte 1 /* has_children */
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.uleb128 0x49 /* DW_AT_type */
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.uleb128 0x13 /* DW_FORM_ref4 */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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.uleb128 5 /* Abbrev start */
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.uleb128 0x21 /* DW_TAG_subrange_type */
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.byte 0 /* has_children */
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.uleb128 0x22 /* DW_AT_lower_bound */
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.uleb128 0x0b /* DW_FORM_data1 */
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.uleb128 0x2f /* DW_AT_upper_bound */
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.uleb128 0x05 /* DW_FORM_data2 */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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.uleb128 6 /* Abbrev start */
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.uleb128 0x24 /* DW_TAG_base_type */
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.byte 0 /* has_children */
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.uleb128 0x0b /* DW_AT_byte_size */
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.uleb128 0x0b /* DW_FORM_data1 */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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