On Mon, 2008-09-01 at 11:16 +0200, Sébastien Chrétien wrote: > Hello, > > I am triying to write a tty_driver under ppc. And I get a kernel > panic. > Can somebody explain me how finding the source of the error with a > kernel panic trace : > thanks
What kind of device are you writing a tty driver for ? I don't see anything much relevant in your backtrace, you went through a crap pointer in init_dev, could be anything at this stage... Can you post your driver to the list ? Ben. > Unable to handle kernel paging request for data at address 0x575555f9 > Faulting instruction address: 0xc0110ddc > Oops: Kernel access of bad area, sig: 11 [#1] > Modules linked in: > NIP: c0110ddc LR: c011118c CTR: 00000000 > REGS: cf01bcb0 TRAP: 0300 Not tainted (2.6.26) > MSR: 00009032 <EE,ME,IR,DR> CR: 44002022 XER: 20000000 > DAR: 575555f9, DSISR: 40000000 > TASK = cf01c000[1] 'swapper' THREAD: cf01a000 > GPR00: 0000000c cf01bd60 cf01c000 cf04c300 ffffffff cf01bdbc 00000000 > c01d0000 > GPR08: 00001249 fffffffc 00000000 cf000420 84002022 00000000 10000b00 > 007fff00 > GPR16: 0fffa1d0 00000000 00000004 cf01bdbc 007ffec0 00000000 00000000 > 00800000 > GPR24: 00000000 c01b7650 00000002 c01d0000 ffffffff ce4a6700 cf04c300 > 57555541 > NIP [c0110ddc] init_dev+0x2bc/0x584 > LR [c011118c] tty_open+0xe8/0x3e0 > Call Trace: > [cf01bd60] [cf01bd78] 0xcf01bd78 (unreliable) > [cf01bdb0] [c011118c] tty_open+0xe8/0x3e0 > [cf01bde0] [c00742c8] chrdev_open+0x114/0x1b0 > [cf01be10] [c006fb5c] __dentry_open+0x190/0x2e8 > [cf01be40] [c006fdac] nameidata_to_filp+0x38/0x70 > [cf01be60] [c007bc60] do_filp_open+0x200/0x7d0 > [cf01bf10] [c00700b4] do_sys_open+0x74/0x114 > [cf01bf40] [c0003c94] init_post+0x34/0x258 > [cf01bf60] [c019ca64] kernel_init+0x258/0x270 > [cf01bff0] [c0011b3c] kernel_thread+0x44/0x60 > Instruction dump: > 7d808120 4e800020 7c832378 4bfa9ea9 7c7f1b79 418201f0 a81e0062 > 2f800001 > 409efd98 83ff00d0 2c1f0000 4182fd90 <801f00b8> 70090080 408201b0 > 801e0060 > ---[ end trace b7795a387aeb7786 ]--- > Kernel panic - not syncing: Attempted to kill init! > allocation failed: out of vmalloc space - use vmalloc=<size> to > increase size. > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-dev _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
