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fix(xtensa): fix registers curruption on context switch

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a6, a7 registers may be corrupted on multicore ESP chips while FreeRTOS
Kernel SMP context switch
This commit is contained in:
Alexey Lapshin 2023-09-12 21:15:09 +04:00 committed by BOT
parent e9ee047908
commit 06ac8505b9
1 changed files with 4 additions and 0 deletions
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4
components/freertos/FreeRTOS-Kernel/portable/xtensa/xtensa_vectors.S
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@ -1045,13 +1045,17 @@ locking.
bnone a2, a0, .L_xt_coproc_done /* if no match then done */
and a2, a2, a0 /* a2 = which CPs to restore */
extui a2, a2, 0, 8 /* extract low 8 bits */
#if portNUM_PROCESSORS == 1
s32i a6, sp, XT_STK_A6 /* save extra needed regs */
s32i a7, sp, XT_STK_A7
#endif /* portNUM_PROCESSORS == 1 */
s32i a13, sp, XT_STK_A13
s32i a14, sp, XT_STK_A14
call0 _xt_coproc_restorecs /* restore CP registers */
#if portNUM_PROCESSORS == 1
l32i a6, sp, XT_STK_A6 /* restore saved registers */
l32i a7, sp, XT_STK_A7
#endif /* portNUM_PROCESSORS == 1 */
l32i a13, sp, XT_STK_A13
l32i a14, sp, XT_STK_A14
j .L_xt_coproc_done