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Re: [Qemu-devel] [PATCH v1 1/2] target/arm: kvm64 make guest debug AA32

From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH v1 1/2] target/arm: kvm64 make guest debug AA32 break point aware
Date: Fri, 14 Dec 2018 07:53:06 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1

On 12/14/18 2:37 AM, Omair Javaid wrote:
> Are you expecting GDB to switch targets (from AArch64 to AArch32 or
> vice versa) when there is mode switch for example a AArch64 binary
> calling a AArch32 library function.

Mode changes happen only at privilege level changes.  E.g. AArch32 binary makes
a system call to an AArch64 kernel, or an AArch32 guest kernel takes an i/o
emulation trap to an AArch64 hypervisor.

But for this sort of system debugging, it would be nice to be able to
single-step through the whole operation.


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