OVMS3-idf/components/newlib/syscalls.c

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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <string.h>
#include <stdbool.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <sys/reent.h>
#include <stdlib.h>
#include "esp_attr.h"
#include "freertos/FreeRTOS.h"
#include "esp_heap_caps.h"
/*
These contain the business logic for the malloc() and realloc() implementation. Because of heap tracing
wrapping reasons, we do not want these to be a public api, however, so they're not defined publicly.
*/
extern void *heap_caps_malloc_default( size_t size );
extern void *heap_caps_realloc_default( void *ptr, size_t size );
void* IRAM_ATTR _malloc_r(struct _reent *r, size_t size)
{
return heap_caps_malloc_default( size );
}
void IRAM_ATTR _free_r(struct _reent *r, void* ptr)
{
heap_caps_free( ptr );
}
void* IRAM_ATTR _realloc_r(struct _reent *r, void* ptr, size_t size)
{
return heap_caps_realloc_default( ptr, size );
}
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void* IRAM_ATTR _calloc_r(struct _reent *r, size_t nmemb, size_t size)
{
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void *result;
size_t size_bytes;
if (__builtin_mul_overflow(nmemb, size, &size_bytes)) {
return NULL;
}
result = malloc(size_bytes);
if (result != NULL) {
bzero(result, size_bytes);
}
return result;
}
int _system_r(struct _reent *r, const char *str)
{
__errno_r(r) = ENOSYS;
return -1;
}
int _raise_r(struct _reent *r, int sig)
{
abort();
}
void* _sbrk_r(struct _reent *r, ptrdiff_t sz)
{
abort();
}
int _getpid_r(struct _reent *r)
{
__errno_r(r) = ENOSYS;
return -1;
}
int _kill_r(struct _reent *r, int pid, int sig)
{
__errno_r(r) = ENOSYS;
return -1;
}
void _exit(int __status)
{
abort();
}