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hw: clrex during context switch (Fixes #1196)

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Stefan Kalkowski 2014-08-27 11:00:24 +02:00 committed by Christian Helmuth
parent eedddeced1
commit 0ffc89ee30
1 changed files with 7 additions and 0 deletions
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7
repos/base-hw/src/core/spec/arm_v7/mode_transition.s
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@ -369,6 +369,13 @@
add sp, sp, #PSR_OFFSET
stm sp, {r0, r1}
/*
* Clear exclusive access in local monitor,
* as we use strex/ldrex in our cmpxchg method, we've to do this during
* a context switch (ARM Reference Manual paragraph 3.4.4.)
*/
clrex
/*********************************************************
** Kernel-entry code that is common for all exceptions **
*********************************************************/