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misc/common: Add nosys stubs.
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@ -28,6 +28,7 @@ SRCS += $(addprefix common/, \
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file_utils.c \
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file_utils.c \
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mp_utils.c \
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mp_utils.c \
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sensor_utils.c \
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sensor_utils.c \
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nosys_stubs.c \
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)
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)
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SRCS += $(addprefix sensors/, \
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SRCS += $(addprefix sensors/, \
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81
src/omv/common/nosys_stubs.c
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81
src/omv/common/nosys_stubs.c
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@ -0,0 +1,81 @@
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/*
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* This file is part of the OpenMV project.
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*
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* Copyright (c) 2024 Ibrahim Abdelkader <iabdalkader@openmv.io>
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* Copyright (c) 2024 Kwabena W. Agyeman <kwagyeman@openmv.io>
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*
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* This work is licensed under the MIT license, see the file LICENSE for details.
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*
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* stub functions for use when linking with nosys.
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*/
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#if OMV_NOSYS_STUBS_ENABLE
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#include <stdint.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include CMSIS_MCU_H
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void _exit(int fd) {
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while (1) {
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__WFI();
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}
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}
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int _write(int handle, char *buffer, int size) {
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errno = ENOSYS;
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return -1;
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}
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int _read(int handle, char *buffer, int size) {
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errno = ENOSYS;
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return -1;
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}
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int _close(int f) {
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errno = ENOSYS;
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return -1;
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}
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int _lseek(int f, int ptr, int dir) {
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errno = ENOSYS;
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return -1;
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}
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int _fstat(int fs, struct stat *st) {
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errno = ENOSYS;
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return -1;
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}
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int _isatty(int f) {
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errno = ENOSYS;
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return 0;
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}
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int _stat(const char *f, struct stat *st) {
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errno = ENOSYS;
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return -1;
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}
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void *_sbrk(ptrdiff_t increment) {
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extern char __end__;
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static char *heap_end;
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extern char _heap_limit;
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static char *heap_limit = &_heap_limit;
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if (heap_end == 0) {
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heap_end = &__end__;
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}
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char *prev_heap_end = heap_end;
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// Check if the new break is within the limits
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if (heap_end + increment > heap_limit) {
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// Out of memory
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errno = ENOMEM;
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return (void *) -1;
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}
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heap_end += increment;
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return (void *) prev_heap_end;
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}
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#endif // OMV_NOSYS_STUBS_ENABLE
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