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etc:users:jcmvbkbc:omap-support-pieces [2009/07/06 16:32] – debugging notes jcmvbkbcetc:users:jcmvbkbc:omap-support-pieces [2016/08/08 20:53] (current) – ↷ Page moved from users:jcmvbkbc:omap-support-pieces to etc:users:jcmvbkbc:omap-support-pieces kel
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 ====== N8x0 support in linux-omap ====== ====== N8x0 support in linux-omap ======
  
-Current kernel: 2.6.31-rc1-omap1+Current kernel: 2.6.35 
 + 
 +[[http://jcmvbkbc.spb.ru/~dumb/ws/osll/n8x0/|Rootfs and kernel config]]
  
 ===== Startup plan ===== ===== Startup plan =====
Line 11: Line 13:
 ===== Subsystems' status ===== ===== Subsystems' status =====
  
 +  * SPI, MMC, USB, mac80211: ok
  
 ===== Debugging in qemu ===== ===== Debugging in qemu =====
Line 26: Line 29:
   * 0x80008000 -- here we jump after decompression (.text.head that has VA of 0xc0008000 has PA 0x80008000 until MMU is active)   * 0x80008000 -- here we jump after decompression (.text.head that has VA of 0xc0008000 has PA 0x80008000 until MMU is active)
   * 0xc0026000 -- 'arm-linux-gnu-objdump -x vmlinux' says that .text starts here   * 0xc0026000 -- 'arm-linux-gnu-objdump -x vmlinux' says that .text starts here
 +
 +
 +
 +==== Booting n8x0 kernel in qemu ====
 +<code>
 +qemu-system-arm -M n810 -kernel "linux-omap-2.6/arch/arm/boot/zImage" -s -sd mmcblk0 -usb
 +</code>
  
 ==== Script for gdb session ==== ==== Script for gdb session ====
Line 32: Line 42:
 break *0x80008000 break *0x80008000
 </code> </code>
 +
 +To debug kernel as usual:
 +  symbol-file linux-omap-2.6/vmlinux
  
 To debug compression-related stuff from the very beginning (start, arch/arm/boot/compressed/head.S) till start_kernel: To debug compression-related stuff from the very beginning (start, arch/arm/boot/compressed/head.S) till start_kernel:
-  add-symbol-file ~/ws/osll/omap/20090610/linux-omap-2.6/arch/arm/boot/compressed/vmlinux 0x80000000+  add-symbol-file linux-omap-2.6/arch/arm/boot/compressed/vmlinux 0x80000000
  
 To debug kernel from stext (arch/arm/kernel/head.S) until MMU is active: To debug kernel from stext (arch/arm/kernel/head.S) until MMU is active:
-  add-symbol-file ~/ws/osll/omap/20090610/linux-omap-2.6/vmlinux 0x80026000 -s .text.head 0x80008000+  add-symbol-file linux-omap-2.6/vmlinux 0x80026000 -s .text.head 0x80008000
  
 To debug kernel from start_kernel (init/main.c): To debug kernel from start_kernel (init/main.c):
-  add-symbol-file ~/ws/osll/omap/20090610/linux-omap-2.6/vmlinux 0xc0026000+  add-symbol-file linux-omap-2.6/vmlinux 0xc0026000
  
 ==== "Blank screen" debugging ==== ==== "Blank screen" debugging ====
etc/users/jcmvbkbc/omap-support-pieces.1246883532.txt.gz · Last modified: 2009/07/06 16:32 by jcmvbkbc