Re: [PATCH] linux-user: Update TASK_UNMAPPED_BASE for aarch64

[Laurent Vivier]

Le 13/03/2020 à 01:28, Lirong Yuan a écrit :
> This change updates TASK_UNMAPPED_BASE (the base address for guest programs) 
> for aarch64. It is needed to allow qemu to work with Thread Sanitizer (TSan), 
> which has specific boundary definitions for memory mappings on different 
> platforms:
> https://github.com/llvm/llvm-project/blob/master/compiler-rt/lib/tsan/rtl/tsan_platform.h
> 
> Signed-off-by: Lirong Yuan <address@hidden>
> ---
>  linux-user/mmap.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/linux-user/mmap.c b/linux-user/mmap.c
> index 8685f02e7e..e378033797 100644
> --- a/linux-user/mmap.c
> +++ b/linux-user/mmap.c
> @@ -184,7 +184,11 @@ static int mmap_frag(abi_ulong real_start,
>  }
>  
>  #if HOST_LONG_BITS == 64 && TARGET_ABI_BITS == 64
> +#ifdef TARGET_AARCH64
> +# define TASK_UNMAPPED_BASE  0x5500000000
> +#else
>  # define TASK_UNMAPPED_BASE  (1ul << 38)
> +#endif
>  #else
>  # define TASK_UNMAPPED_BASE  0x40000000
>  #endif
> 

Reviewed-by: Laurent Vivier <address@hidden>