* [Qemu-devel] Debugging bootloader with gdb in qemu
@ 2014-01-01 7:55 Maryyam Muhammad Din
2014-01-01 9:27 ` Antony Pavlov
0 siblings, 1 reply; 2+ messages in thread
From: Maryyam Muhammad Din @ 2014-01-01 7:55 UTC (permalink / raw)
To: qemu-discuss, qemu-devel; +Cc: awaheed777
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I am trying to debug bootloader with gdb in QEMU. I run QEMU command like
this
./qemu-system-mips64 -s -S -m 1024 -M octeon -bios
u-boot-octeon_ebh5610.bin -kernel vmlinux.64 -append 'coremask=001 mem=0
root=/dev/sda2'
and then connect gdb using
mips64-octeon-linux-gnu-gdb u-boot-octeon_ebh5610
target remote localhost:1234
when i try to step into bootloader code, it continues execution without
breaking. This totally skip the bootloader code which i want to examine
step by step as it execute.
Can anyone suggest, what do i need to do to resolve this issue.
Thank You
--
Maryyam Muhammad Din
Al-Khawarizmi Institute of Computer Science
UET Lahore
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [Qemu-devel] Debugging bootloader with gdb in qemu
2014-01-01 7:55 [Qemu-devel] Debugging bootloader with gdb in qemu Maryyam Muhammad Din
@ 2014-01-01 9:27 ` Antony Pavlov
0 siblings, 0 replies; 2+ messages in thread
From: Antony Pavlov @ 2014-01-01 9:27 UTC (permalink / raw)
To: Maryyam Muhammad Din; +Cc: awaheed777, qemu-devel, qemu-discuss
On Wed, 1 Jan 2014 12:55:38 +0500
Maryyam Muhammad Din <maryyam35@gmail.com> wrote:
> I am trying to debug bootloader with gdb in QEMU. I run QEMU command like
> this
>
> ./qemu-system-mips64 -s -S -m 1024 -M octeon -bios
> u-boot-octeon_ebh5610.bin -kernel vmlinux.64 -append 'coremask=001 mem=0
> root=/dev/sda2'
>
> and then connect gdb using
>
> mips64-octeon-linux-gnu-gdb u-boot-octeon_ebh5610
> target remote localhost:1234
>
> when i try to step into bootloader code, it continues execution without
> breaking. This totally skip the bootloader code which i want to examine
> step by step as it execute.
> Can anyone suggest, what do i need to do to resolve this issue.
See this screencast:
http://dir.tftpd.net:7080/~antony/mips-barebox-qemu-gdb-howto-20131219.avi
This screencast will show you how to trace bootloader (barebox, http://www.barebox.org)
for MIPS malta using qemu and gdb.
> Thank You
> --
> Maryyam Muhammad Din
> Al-Khawarizmi Institute of Computer Science
> UET Lahore
--
--
Best regards,
Antony Pavlov
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