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Re: [Qemu-devel] [PATCH] linux-user: Fix MIPS N64 trap and break instruc


From: Leon Alrae
Subject: Re: [Qemu-devel] [PATCH] linux-user: Fix MIPS N64 trap and break instruction bug
Date: Tue, 30 Jun 2015 14:18:10 +0100
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

On 29/06/2015 11:20, Andrew Bennett wrote:
> From: Andrew Bennett <address@hidden>
> 
> For the MIPS N64 ABI when QEMU reads the break/trap instruction so that
> it can inspect the break/trap code it reads 8 rather than 4 bytes
> which means it finds the code field from the instruction after the 
> break/trap instruction.  This then causes the break/trap handling
> code to fail because it does not understand the code number.
> 
> The fix forces QEMU to always read 4 bytes of instruction data rather
> than deciding how much to read based on the ABI.
> 
> Signed-off-by: Andrew Bennett <address@hidden>
> ---
>  linux-user/main.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Leon Alrae <address@hidden>

Thanks,
Leon




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