YAMAMOTO Takashi 7f307f9765 sim: Restore stack alignemnt ... Reapply the following commit [1], which has been reverted by the recent change [2] with no obvious reasons. Also, add a comment block to explain the calculation. [1] ``` commit 298c2e5e4f Author: YAMAMOTO Takashi <yamamoto@midokura.com> Date: Wed Jan 29 03:26:43 2020 +0900 sim: Fix stack alignment The recent x86-64 convention requires 16-byte alignment before (not after) calling a function. This fixes snprintf crash I observed on macOS while saving XMM registers. ``` [2] ``` commit 2335b69120 Author: Xiang Xiao <xiaoxiang@xiaomi.com> Date: Mon Apr 12 23:44:08 2021 +0800 arch: Allocate the space from the beginning in up_stack_frame arch: Allocate the space from the beginning in up_stack_frame and modify the affected portion: 1.Correct the stack dump and check 2.Allocate tls_info_s by up_stack_frame too 3.Move the stack fork allocation from arch to sched Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> ```		2021-04-19 01:29:38 -05:00
..
include	arch/sim: Move setjmp/longjmp to libc/machine/sim	2021-04-05 09:00:42 -03:00
src	sim: Restore stack alignemnt	2021-04-19 01:29:38 -05:00
Kconfig	sim: add the simulated lower-half FOC device	2021-03-31 04:32:26 -05:00