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Newlib: implement locks

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* Dynamically allocate arc4random data. Saves about 1k off the bss.
This commit is contained in:
Our Air Quality 2017-12-09 00:45:57 +11:00
parent 89c6c410ff
commit e9d9201527
24 changed files with 3442 additions and 44 deletions
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17
open_esplibs/libpp/pp.c
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@ -4,6 +4,23 @@
BSD Licensed as described in the file LICENSE
*/
#include "open_esplibs.h"
#include "stdlib.h"
#include "stdint.h"
/*
* This replaces a dynamic allocation, a call to zalloc(), from within a
* critical section in the ppTask. The allocation aquired the malloc lock and
* doing so withing a critical section is not safe because it might preempt
* another task which is not possible from within a critical section. The data
* is written to the rtc memory, and was then freed. The freeing has been
* patched to be a nop.
*/
static const uint32_t pp_zeros[8];
void *_ppz20(size_t n)
{
return &pp_zeros;
}
#if OPEN_LIBPP_PP
// The contents of this file are only built if OPEN_LIBPHY_PHY_CHIP_SLEEP is set to true