https://sourceware.org/bugzilla/show_bug.cgi?id=28386
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2021-09-26
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
It looks like a valid DWARF5 feature:
[hjl@gnu-gram-1 obj]$ readelf -w test.o
Raw dump of debug contents of section .debug_line:
Offset: 0x0
Length: 71
DWARF Version: 5
Address size (bytes): 8
Segment selector (bytes): 0
Prologue Length: 46
Minimum Instruction Length: 1
Maximum Ops per Instruction: 1
Initial value of 'is_stmt': 1
Line Base: -5
Line Range: 14
Opcode Base: 13
Opcodes:
Opcode 1 has 0 args
Opcode 2 has 1 arg
Opcode 3 has 1 arg
Opcode 4 has 1 arg
Opcode 5 has 1 arg
Opcode 6 has 0 args
Opcode 7 has 0 args
Opcode 8 has 0 args
Opcode 9 has 1 arg
Opcode 10 has 0 args
Opcode 11 has 0 args
Opcode 12 has 1 arg
The Directory Table (offset 0x22, lines 2, columns 1):
Entry Name
0 (indirect line string, offset: 0x0): /tmp/obj
1 (indirect line string, offset: 0x9): ..
The File Name Table (offset 0x30, lines 2, columns 2):
Entry Dir Name
0 0 (indirect line string, offset: 0xc): test.S
1 1 (indirect line string, offset: 0x13): test.S
Line Number Statements:
[0x0000003a] Extended opcode 2: set Address to 0x0
[0x00000045] Special opcode 7: advance Address by 0 to 0x0 and Line by 2 to
3
[0x00000046] Advance PC by 1 to 0x1
[0x00000048] Extended opcode 1: End of Sequence
Contents of the .debug_line_str section:
0x00000000 2f746d70 2f6f626a 002e2e00 74657374 /tmp/obj....test
0x00000010 2e530074 6573742e 5300 .S.test.S.
Contents of the .debug_info section:
Compilation Unit @ offset 0x0:
Length: 0x24 (32-bit)
Version: 5
Unit Type: DW_UT_compile (1)
Abbrev Offset: 0x0
Pointer Size: 8
<0><c>: Abbrev Number: 1 (DW_TAG_compile_unit)
<d> DW_AT_stmt_list : 0x0
<11> DW_AT_low_pc : 0x0
<19> DW_AT_high_pc : 1
<1a> DW_AT_name : (indirect string, offset: 0x0): test.S
<1e> DW_AT_comp_dir : (indirect string, offset: 0x7): /tmp/obj
<22> DW_AT_producer : (indirect string, offset: 0x10): GNU AS
2.37.50.0.1
<26> DW_AT_language : 32769 (MIPS assembler)
Contents of the .debug_abbrev section:
Number TAG (0x0)
1 DW_TAG_compile_unit [no children]
DW_AT_stmt_list DW_FORM_sec_offset
DW_AT_low_pc DW_FORM_addr
DW_AT_high_pc DW_FORM_udata
DW_AT_name DW_FORM_strp
DW_AT_comp_dir DW_FORM_strp
DW_AT_producer DW_FORM_strp
DW_AT_language DW_FORM_data2
DW_AT value: 0 DW_FORM value: 0
Contents of the .debug_aranges section:
Length: 44
Version: 2
Offset into .debug_info: 0x0
Pointer Size: 8
Segment Size: 0
Address Length
0000000000000000 0000000000000001
0000000000000000 0000000000000000
Contents of the .debug_str section:
0x00000000 74657374 2e53002f 746d702f 6f626a00 test.S./tmp/obj.
0x00000010 474e5520 41532032 2e33372e 35302e30 GNU AS 2.37.50.0
0x00000020 2e3100 .1.
[hjl@gnu-gram-1 obj]$ objdump -S test.o
test.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <foo>:
.global foo
foo:
ret
0: c3 ret
[hjl@gnu-gram-1 obj]$
--
You are receiving this mail because:
You are on the CC list for the bug.
