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Norman Feske a4115cfea9 base-linux: discharge timestamp on AARCH64 
The kernel-agnostic 'Trace::timestamp' function for arm_64 executes the
'mrs %0, pmccntr_el0' instruction, which is not permitted for user-level
programs on Linux. This patch shadows the generic timestamp.h header
with dummy that returns zero. This return value prompts the timeout
framework to disable the interpolation of time based on timestamps. This
avoid the illegal-instruction abort but comes with two llimitations:

First, time measurements are effectlively limited to a granulariry of 1
millisecond (deliberately constrained by the timer driver).

The quirk is applied when using the base-linux API. Should a generic
application (that uses the base API only) call 'Trace::timestamp'
directly, the illegal instruction is executed.

Issue #4136
2021-05-10 11:17:20 +02:00
..
etc base: remove SPEC variables of boards (fix #3971) 2021-01-25 13:58:09 +01:00
include/spec/arm_64/trace base-linux: discharge timestamp on AARCH64 2021-05-10 11:17:20 +02:00
lib base-linux: 64-bit ARM support 2021-05-10 11:17:20 +02:00
recipes base-linux: discharge timestamp on AARCH64 2021-05-10 11:17:20 +02:00
run lx_hybrid_errno.run: add missing parent services 2020-03-26 11:38:54 +01:00
src base-linux: 64-bit ARM support 2021-05-10 11:17:20 +02:00
README Move repositories to 'repos/' subdirectory 2014-05-14 16:08:00 +02:00

README 

This repository contains the Linux-specific implementation of Genode.