Question about Call Trace

kulturfenster · 12-04-2009, 03:06 PM

hi everybody

i am trying to load a little module into the kernel. Now i get the following call trace:

Code:

Call Trace:
[  630.144474]  [<ffffffffa004e6b0>] ? mymodule_init+0x0/0x280 [mymodule]
[  630.144479]  [<ffffffff8100a047>] do_one_initcall+0x37/0x1a0
[  630.144482]  [<ffffffff81091b67>] sys_init_module+0xd7/0x230
[  630.144485]  [<ffffffff81012002>] system_call_fastpath+0x16/0x1b
[  630.144487] Code: ff 0f 84 6a 01 00 00 c1 e7 14 48 c7 c2 65 e9 04 a0 be 01 00 00 00 89 3d 5d 15 00 00 e8 80 49 0d e1 89 c3 85 db 0f 88 ad 01 00 00 <48> 83 3c 25 00 00 00 00 00 0f 84 82 01 00 00 bb 18 00 00 00 48 
[  630.144509] RIP  [<ffffffffa004e71a>] mymodule_init+0x6a/0x280 [mymodule]
[  630.144512]  RSP <ffff8800c1989ef8>
[  630.144513] CR2: 0000000000000000
[  630.144515] ---[ end trace ce6e6d732595d4a7 ]---

ok, it leads me to the function where the module crashes. But what does " ? mymodule_init+0x0/0x280" tell me?

jhwilliams · 12-05-2009, 12:38 PM

I don't know. But my guess is that 0x280 is the binary offset (based off the start of the binary) wherein the crash occurred. Perhaps the "?" instead means that an unknown call was made at that location. Just throwing out some ideas here.