On 16.08.21 19:49, David Hildenbrand wrote:
On 16.08.21 19:34, Jiri Olsa wrote:
hi,
I'm getting fault below when running:
# cat /proc/kallsyms | grep ksys_read
ffffffff8136d580 T ksys_read
# objdump -d --start-address=0xffffffff8136d580 --stop-address=0xffffffff8136d590 /proc/kcore
/proc/kcore: file format elf64-x86-64
Segmentation fault
any idea? config is attached
Just tried with a different config on 5.14.0-rc6+
[root@localhost ~]# cat /proc/kallsyms | grep ksys_read
ffffffff8927a800 T ksys_readahead
ffffffff89333660 T ksys_read
[root@localhost ~]# objdump -d --start-address=0xffffffff89333660
--stop-address=0xffffffff89333670
a.out: file format elf64-x86-64
Sorry, missed the /proc/kcore part:
[root@localhost ~]# cat /proc/kallsyms | grep ksys_read
ffffffffba27a800 T ksys_readahead
ffffffffba333660 T ksys_read
[root@localhost ~]# objdump -d --start-address=0xffffffffba333660
--stop-address=0xffffffffba333670 /proc/kcore
/proc/kcore: file format elf64-x86-64
Disassembly of section load1:
ffffffffba333660 <load1+0x333660>:
ffffffffba333660: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
ffffffffba333665: 41 55 push %r13
ffffffffba333667: 49 89 d5 mov %rdx,%r13
ffffffffba33366a: 41 54 push %r12
ffffffffba33366c: 49 89 f4 mov %rsi,%r12
ffffffffba33366f: 55 push %rbp
--
Thanks,
David / dhildenb
