esp-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"
void IRAM_ATTR abort()
{
do
{
__asm__ ("break 0,0");
*((int*) 0) = 0;
} while(true);
}
void* IRAM_ATTR _malloc_r(struct _reent *r, size_t size)
{
return pvPortMalloc(size);
}
void IRAM_ATTR _free_r(struct _reent *r, void* ptr)
{
vPortFree(ptr);
}
void* IRAM_ATTR _realloc_r(struct _reent *r, void* ptr, size_t size)
{
void* new_chunk;
if (size == 0) {
if (ptr) {
vPortFree(ptr);
}
return NULL;
}
new_chunk = pvPortMalloc(size);
if (new_chunk && ptr) {
memcpy(new_chunk, ptr, size);
vPortFree(ptr);
}
// realloc behaviour: don't free original chunk if alloc failed
return new_chunk;
}
void* IRAM_ATTR _calloc_r(struct _reent *r, size_t count, size_t size)
{
void* result = pvPortMalloc(count * size);
if (result)
{
memset(result, 0, count * size);
}
return result;
}
int _system_r(struct _reent *r, const char *str)
{
__errno_r(r) = ENOSYS;
return -1;
}
void _raise_r(struct _reent *r)
{
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();
}