http://sourceware.org/bugzilla/show_bug.cgi?id=12639
Summary: readelf failed detect corrupted symtab
Product: binutils
Version: 2.22 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: binutils
AssignedTo: unassig...@sources.redhat.com
ReportedBy: hjl.to...@gmail.com
Created attachment 5646
--> http://sourceware.org/bugzilla/attachment.cgi?id=5646
A testcase with bad symtab
[hjl@gnu-6 cq167859]$ readelf -sS --wide tr70098.bad.o
There are 13 section headers, starting at offset 0x3008:
Section Headers:
[Nr] Name Type Address Off Size ES Flg
Lk Inf Al
[ 0] NULL 0000000000000000 000000 000000 00
0 0 0
[ 1] .symtab SYMTAB 0000000000000000 000040 000420 18
9 37 4
[ 2] .rodata PROGBITS 0000000000000000 000460 000240 00 A
0 0 32
[ 3] .data PROGBITS 0000000000000000 0006a0 000c28 00 WA
0 0 8
[ 4] .rodata.str1.4 PROGBITS 0000000000000000 0012c8 000008 01 AMS
0 0 4
[ 5] .text PROGBITS 0000000000000000 0012d0 000c00 00 AX
0 0 16
[ 6] .note.GNU-stack NOTE 0000000000000000 001ed0 000000 00
0 0 1
[ 7] .comment PROGBITS 0000000000000000 001ed0 000013 00
0 0 1
[ 8] .eh_frame PROGBITS 0000000000000000 001ee3 000238 00 A
0 0 4
[ 9] .strtab STRTAB 0000000000000000 00211b 000348 00
0 0 1
[10] .rela.data RELA 0000000000000000 002463 0001b0 18
1 3 8
[11] .rela.text RELA 0000000000000000 002613 0009a8 18
1 5 8
[12] .rela.eh_frame RELA 0000000000000000 002fbb 000048 18
1 8 8
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings), l (large)
I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
Symbol table '.symtab' contains 44 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000000000 0 FILE LOCAL DEFAULT ABS tr70098.c
2: 0000000000000000 0 SECTION LOCAL DEFAULT 9 .strtab
3: 0000000000000000 0 SECTION LOCAL DEFAULT 1 .symtab
4: 0000000000000000 0 SECTION LOCAL DEFAULT 2 .rodata
5: 0000000000000000 0 SECTION LOCAL DEFAULT 3 .data
6: 0000000000000000 0 SECTION LOCAL DEFAULT 4 .rodata.str1.4
7: 0000000000000000 8 OBJECT LOCAL DEFAULT 4 .L_2__STRING.0
8: 0000000000000000 0 SECTION LOCAL DEFAULT 5 .text
9: 0000000000000000 20 OBJECT LOCAL DEFAULT 3
__pgo_segment_2pack.7.0.3
10: 0000000000000018 52 OBJECT LOCAL DEFAULT 3
__pgo_segment_2pack.8.0.3
11: 0000000000000050 848 OBJECT LOCAL DEFAULT 3
__pgo_segment_2pack.6.0.3
12: 0000000000000000 73 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.8.0.3
13: 000000000000004c 83 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.9.0.3
14: 00000000000000a0 5 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.10.0.3
15: 00000000000000a8 5 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.11.0.3
16: 00000000000003a0 20 OBJECT LOCAL DEFAULT 3
__pgo_segment_2pack.1.0.1
17: 00000000000003b8 80 OBJECT LOCAL DEFAULT 3
__pgo_segment_2pack.2.0.1
18: 0000000000000408 1552 OBJECT LOCAL DEFAULT 3
__pgo_segment_2pack.0.0.1
19: 00000000000000c0 73 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.0.0.1
20: 000000000000010c 83 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.1.0.1
21: 0000000000000160 5 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.2.0.1
22: 0000000000000168 4 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.3.0.1
23: 0000000000000a18 20 OBJECT LOCAL DEFAULT 3
__pgo_segment_2pack.4.0.2
24: 0000000000000a30 36 OBJECT LOCAL DEFAULT 3
__pgo_segment_2pack.5.0.2
25: 0000000000000a58 464 OBJECT LOCAL DEFAULT 3
__pgo_segment_2pack.3.0.2
26: 0000000000000180 73 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.4.0.2
27: 00000000000001cc 83 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.5.0.2
28: 0000000000000220 5 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.6.0.2
29: 0000000000000228 5 OBJECT LOCAL DEFAULT 2
__pgopti_2inst_string.7.0.2
30: 0000000000000000 0 SECTION LOCAL DEFAULT 6 .note.GNU-stack
31: 0000000000000000 0 SECTION LOCAL DEFAULT 7 .comment
32: 0000000000000000 0 SECTION LOCAL DEFAULT 8 .eh_frame
33: 0000000000000000 0 SECTION LOCAL DEFAULT 10 .rela.data
34: 0000000000000000 0 SECTION LOCAL DEFAULT 11 .rela.text
35: 0000000000000000 0 SECTION LOCAL DEFAULT 12 .rela.eh_frame
36: 0000000000000000 1392 FUNC GLOBAL DEFAULT 5 main
...
The sh_info field of symtab section header should be 36, not 37.
But readelf doesn't detect it.
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