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Re: [Qemu-discuss] Singlestepping & Target assembly instructions

From: Scott Dattalo
Subject: Re: [Qemu-discuss] Singlestepping & Target assembly instructions
Date: Thu, 17 Sep 2015 13:48:15 -0700
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0

On 9/17/2015 12:06 PM, Peter Maydell wrote:

If "-d help" doesn't produce a list including 'nochain' with the
help text as per the patch, then something has gone wrong with your
compile/install process, or you're just accidentally running the
wrong qemu binary.

You're correct: the version in /usr/bin was taking precedence over the one in /usr/local/bin. I should've caught that... The nochain option is indeed enabled with the patch.

Unfortunately, I must be missing something else. Here's how I invoke QEmu:

$ qemu-system-arm -M versatilepb -m 128M -nographic -D trace.log -d in_asm,cpu,nochain -singlestep -kernel myfile.bin

The same trace.log is produced when 'nochain' is omitted. I was expecting the nochain to tell QEmu to emit the entire execution trace. Am I missing (or adding) another option? Or am I misunderstanding the intent of nochain?

BTW, the -s -S options still allow gdb to attach and the trace log for single stepping is the same as before.

Thanks for your patience!


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