DynamoRIO / DynamoRIO/dynamorio
use the ARM vdso to improve performance
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OpSys-ARM
Performance
Type-Feature
- Dominant language
- C
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Description
The ARM vdso page contains utility functions (xref http://man7.org/linux/man-pages/man7/vdso.7.html).
% grep ^kuser linux-git/Documentation/arm/kernel_user_helpers.txt
kuser_helper_version
kuser_get_tls
kuser_cmpxchg
kuser_memory_barrier
kuser_cmpxchg64
Unfortunately there are no time or clock routines like are present for x86 (for #1581).
This is the most useful one as it should be faster than pipeline-stalling coproc instructions:
kuser_get_tls
Get the TLS value as previously set via the __ARM_NR_set_tls syscall.
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