Dear all,
I have try to attach a AT91 TC hardware interrupt using rtdm_irq_request.
Whenever the rtdm_irq_request is called, the kernel Oops occurs.
Any ideas on the problem?
Please help. Thanks
Regards,
chun yeow
Unable to handle kernel NULL pointer dereference at virtual address 00000010
pgd = c3564000
[00000010] *pgd=234da031, *pte=00000000, *ppte=00000000
Internal error: Oops: 817 [#1]
Modules linked in: rtdm_test
CPU: 0
PC is at xnintr_init+0x18/0x5c
LR is at 0x194
pc : [<c0079974>] lr : [<00000194>] Tainted: P
sp : c3553e0c ip : c0367804 fp : c3553e20
r10: 00000018 r9 : c03e7ac0 r8 : 00000000
r7 : bf003880 r6 : 00000001 r5 : 00000000 r4 : 00000000
r3 : bf003090 r2 : 00000012 r1 : bf003174 r0 : 00000000
Flags: nZcv IRQs on FIQs on Mode SVC_32 Segment user
Control: 317F
Table: 23564000 DAC: 00000015
Process user (pid: 265, stack limit = 0xc3552258)
Stack: (0xc3553e0c to 0xc3554000)
3e00: bf003090 00000000 c3553e40 c3553e24
c00abab4
3e20: c007996c 00000000 00000000 00000000 c0672600 c3553e60 c3553e44
bf003078
3e40: c00aba8c bf003174 00000000 c03e7ac0 00000000 c3553e98 c3553e64
c00aa83c
3e60: bf00304c 00000001 c00accb8 c07943e0 c0400cf0 ffffffff c3553e9c
00000000
3e80: c0672600 c3553fb0 c3553fb0 c3553ed8 c3553e9c c00acccc c00aa734
6f6d6564
3ea0: 30766564 00000000 276e6163 706f2074 25206e65 00000a73 00fff6e4
00000050
3ec0: 00000000 c3552000 00000008 c3553f08 c3553edc c0086b58 c00acc74
c3553f08
3ee0: 00000000 00000100 00000000 c03b5b20 20000013 c0086a8c c03b5b20
c3553f58
3f00: c3553f0c c0074aa0 c0086a9c c03b5aa4 00000000 00000020 c3553fb0
00000008
3f20: c03b5aa4 00000001 c03b5b20 c3553f58 40023e08 00000000 00000000
000f0042
3f40: c00256a8 c3553fb0 c3552000 c3553f90 c3553f5c c002c098 c0074a20
00000000
3f60: 00000000 00000000 40023e08 00000000 00000000 000f0042 c00256a8
c3552000
3f80: 009f0042 00000000 c3553f94 c0024fd4 c002c034 0103022b 00009038
00000000
3fa0: 00009038 00000000 40023e08 00000000 0103022b 00009038 00000000
00009038
3fc0: 40023e08 00000000 00000000 000f0042 00000000 00000000 40024000
bec17d64
3fe0: 400527b8 bec17d44 00008d5c 400527f8 20000010 0103022b 20002031
20002431
Backtrace:
[<c007995c>] (xnintr_init+0x0/0x5c) from [<c00abab4>]
(rtdm_irq_request+0x38/0x74)
r4 = 00000000
[<c00aba7c>] (rtdm_irq_request+0x0/0x74) from [<bf003078>]
(demo_open_rt+0x3c/0x54 [rtdm_test])
r5 = C0672600 r4 = 00000000
[<bf00303c>] (demo_open_rt+0x0/0x54 [rtdm_test]) from [<c00aa83c>]
(_rtdm_open+0x118/0x144)
r4 = 00000000
[<c00aa724>] (_rtdm_open+0x0/0x144) from [<c00acccc>]
(sys_rtdm_open+0x68/0x70)
r8 = C3553FB0 r7 = C3553FB0 r6 = C0672600 r5 = 00000000
r4 = C3553E9C
[<c00acc64>] (sys_rtdm_open+0x0/0x70) from [<c0086b58>]
(losyscall_event+0xcc/0x1e0)
r7 = 00000008 r6 = C3552000 r5 = 00000000 r4 = 00000050
[<c0086a8c>] (losyscall_event+0x0/0x1e0) from [<c0074aa0>]
(__ipipe_dispatch_event+0x90/0x23c)
[<c0074a10>] (__ipipe_dispatch_event+0x0/0x23c) from [<c002c098>]
(__ipipe_syscall_root+0x74/0x170)
[<c002c024>] (__ipipe_syscall_root+0x0/0x170) from [<c0024fd4>]
(vector_swi+0x74/0xb0)
Code: e24cb004 e24dd004 ebfeca1e e59fc03c (e5802010)
I-pipe tracer log (30 points):
+func 0 ipipe_trace_panic_freeze+0x14
(bust_spinlocks+0x20)
+func -5 bust_spinlocks+0x14 (__do_kernel_fault+0x38)
+func -13 ipipe_check_context+0x14
(search_module_extables+0xcc)
+func -19 sub_preempt_count+0x10
(search_module_extables+0xc4)
+func -25 ipipe_check_context+0x14
(search_module_extables+0xbc)
| +end 0x80000000 -31 __ipipe_unstall_root+0x4c
(__ipipe_restore_root+0x70)
| #begin 0x80000000 -37 __ipipe_unstall_root+0x70
(__ipipe_restore_root+0x70)
#func -43 __ipipe_unstall_root+0x10
(__ipipe_restore_root+0x70)
#func -48 __ipipe_restore_root+0x10
(search_module_extables+0xb4)
#func -60 add_preempt_count+0x10
(search_module_extables+0x50)
#func -66 ipipe_check_context+0x14
(search_module_extables+0x48)
+func -73 search_module_extables+0x14
(search_exception_tables+0x38)
+func -86 search_extable+0x14
(search_exception_tables+0x28)
+func -92 search_exception_tables+0x14
(fixup_exception+0x20)
+func -99 fixup_exception+0x14
(__do_kernel_fault+0x28)
+func -105 __do_kernel_fault+0x10 (do_page_fault+0x1b0)
+func -112 ipipe_check_context+0x14 (__up_read+0x90)
+func -118 sub_preempt_count+0x10 (__up_read+0x88)
+func -124 ipipe_check_context+0x14 (__up_read+0x80)
| +end 0x80000000 -130 __ipipe_unstall_root+0x4c
(__ipipe_restore_root+0x70)
| #begin 0x80000000 -136 __ipipe_unstall_root+0x70
(__ipipe_restore_root+0x70)
#func -144 __ipipe_unstall_root+0x10
(__ipipe_restore_root+0x70)
#func -149 __ipipe_restore_root+0x10 (__up_read+0x78)
#func -155 add_preempt_count+0x10 (__up_read+0x4c)
#func -161 ipipe_check_context+0x14 (__up_read+0x44)
+func -167 __up_read+0x10 (up_read+0x14)
+func -172 up_read+0x10 (do_page_fault+0x120)
+func -182 find_vma+0x14 (do_page_fault+0xe0)
+func -190 ipipe_check_context+0x14
(__down_read_trylock+0x94)
+func -196 sub_preempt_count+0x10
(__down_read_trylock+0x8c)
Segmentation fault
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