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linux-user: Update TASK_UNMAPPED_BASE for aarch64 

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 <yuanzi@google.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200313002813.3857-1-yuanzi@google.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Lirong Yuan 2020-03-12 17:28:13 -07:00 committed by Laurent Vivier
parent 2039b1b0dc
commit aab613fb95
1 changed files with 4 additions and 0 deletions
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linux-user/mmap.c
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@ -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