Digilent Embedded Linux Instrukcja Użytkownika Pobierz pdf (Strona 20)

Using Zynq with Linux

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Example 20.

Locating codes using GDB and XMD

Another good way to debug the kernel is to use a GDB remote protocol with the Xilinx Microprocessor

Debugger (XMD) via JTAG to debug a running kernel on a Zynq AP SoC based Digilent Board. In the

command line of the host PC, open XMD and connect to the Zynq board using the command:

xmd> connect arm hw.

Open another command line on your host PC, and run GDB using command: $gdb –nw vmlinux.

Then, under the GDB command prompt, connect to the port created by XMD (the default should be

localhost:1234) with the command: (gdb) target remote localhost:1234.

[ 0.990000] kernel BUG at arch/arm/mm/dma-mapping.c:254!

[ 0.990000] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP

[ 0.990000] Modules linked in:

[ 0.990000] CPU: 1 Tainted: G W (3.3.0-digilent-12.07-zed-beta-dirty #3)

[ 0.990000] PC is at __dma_alloc+0x1c4/0x2f0

[ 0.990000] LR is at arm_vmregion_alloc+0xe0/0x110

[ 0.990000] pc : [<c0016064>] lr : [<c0017ad4>] psr: a0000013

[ 0.990000] sp : d8061da8 ip : 00384000 fp : c085f000

[ 0.990000] r10: d82436c0 r9 : c085f000 r8 : 00000005

[ 0.990000] r7 : 00000100 r6 : dfffc400 r5 : 00384000 r4 : fffc066f

[ 0.990000] r3 : fd600000 r2 : 00000000 r1 : 00000001 r0 : d82436c0

[ 0.990000] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel

[ 0.990000] Control: 18c5387d Table: 0000404a DAC: 00000015

[ 0.990000] Process kworker/1:0 (pid: 8, stack limit = 0xd80602f0)

[ 0.990000] Stack: (0xd8061da8 to 0xd8062000)

[ 0.990000] 1da0: c047d174 d8061e78 00000001 d8249f98 d8204800 d8249f40

[ 0.990000] 1dc0: d8204800 00384000 d8204800 00000000 00000004 00384000 00000000 c00161ac

[ 0.990000] 1de0: 00000447 00384000 d8249f98 c0190598 d8061e78 00000001 d837bdc0 c017cc00

[ 0.990000] 1e00: 00000500 000002d0 00000020 d8061e24 00000000 00000500 000002d0 34325258

[ 0.990000] 1e20: 00000000 00000000 00000000 00000000 00000000 00001400 00000000 00000000

[ 0.990000] 1e40: 00000000 00000000 00000000 00000000 00000000 d82c7340 d837bdc0 00000001

[ 0.990000] 1e60: 000002d0 00000500 00000001 d8061ecc d8204038 c017ad38 00000500 000002d0

[ 0.990000] 1e80: 00000500 000002d0 00000020 00000018 d837bdc0 00000001 d8204800 00000020

[ 0.990000] 1ea0: d8200d00 c017af94 00000000 c0093144 05d1745d d837bdc0 d8204800 00000001

[ 0.990000] 1ec0: 00000000 c0093210 c04801c4 00000000 d837bdc0 d8204800 00000020 00000000

[ 0.990000] 1ee0: 00000001 c09464e8 c0486d5c c017ca84 d8204800 d82c76c0 00000000 c04b2360

[ 0.990000] 1f00: c093a834 c0191390 d8061f10 c0184774 c093a5e0 00000001 00000000 c03dae33

[ 0.990000] 1f20: 00000000 d8204a50 00000001 00000000 c0486c68 00000000 c0486c68 00000000

[ 0.990000] 1f40: d8204800 d8204a50 00000000 c01861a4 d80bbe00 c0486c68 00000001 c04b2360

[ 0.990000] 1f60: d80179c0 c0946400 c0949c00 c01914c8 00000000 c00325e0 d80179c0 00000000

[ 0.990000] 1f80: c0486d60 d80179c0 c0946400 d80179d0 00000001 c0946400 00000000 00000009

[ 0.990000] 1fa0: 00000000 c0032be0 00000000 d804ff00 d80179c0 c0032a34 00000013 00000000

[ 0.990000] 1fc0: 00000000 c0035e94 c000dfcc 00000000 d80179c0 00000000 00000000 00000000

[ 0.990000] 1fe0: d8061fe0 d8061fe0 d804ff00 c0035e14 c000dfcc c000dfcc 65111104 16010002

[ 0.990000] [<c0016064>] (__dma_alloc+0x1c4/0x2f0) from [<c00161ac>]

(dma_alloc_writecombine+0x1c/0x24)

[ 0.990000] [<c00161ac>] (dma_alloc_writecombine+0x1c/0x24) from [<c0190598>]

(drm_gem_cma_create+0x4c/0xc8)

[ 0.990000] [<c0190598>] (drm_gem_cma_create+0x4c/0xc8) from [<c017cc00>]

(drm_fbdev_cma_probe+0xa8/0x20c)

[ 0.990000] [<c017cc00>] (drm_fbdev_cma_probe+0xa8/0x20c) from [<c017ad38>]

(drm_fb_helper_single_fb_probe+0x190/0x278)

[ 0.990000] [<c017ad38>] (drm_fb_helper_single_fb_probe+0x190/0x278) from [<c017af94>]

(drm_fb_helper_initial_config+0x174/0x1b0)

[ 0.990000] [<c017af94>] (drm_fb_helper_initial_config+0x174/0x1b0) from [<c017ca84>]

(drm_fbdev_cma_init+0xa8/0xd4)

[ 0.990000] [<c017ca84>] (drm_fbdev_cma_init+0xa8/0xd4) from [<c0191390>]

(analog_drm_load+0x100/0x154)

[ 0.990000] [<c0191390>] (analog_drm_load+0x100/0x154) from [<c01861a4>]

(drm_get_platform_dev+0xe0/0x1bc)

[ 0.990000] [<c01861a4>] (drm_get_platform_dev+0xe0/0x1bc) from [<c00325e0>]

(process_one_work+0x1d4/0x304)

[ 0.990000] [<c00325e0>] (process_one_work+0x1d4/0x304) from [<c0032be0>]

(worker_thread+0x1ac/0x2c4)

[ 0.990000] [<c0032be0>] (worker_thread+0x1ac/0x2c4) from [<c0035e94>] (kthread+0x80/0x8c)

[ 0.990000] [<c0035e94>] (kthread+0x80/0x8c) from [<c000dfcc>] (kernel_thread_exit+0x0/0x8)

[ 0.990000] Code: e0866107 e5964000 e3540000 0a000000 (e7f001f2)

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