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/*
* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdbool.h>
#include <stdlib.h>
#include <stdarg.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <reent.h>
#include <sys/fcntl.h>
#include "sdkconfig.h"
#include "esp_rom_uart.h"
static int syscall_not_implemented(struct _reent *r, ...)
{
__errno_r(r) = ENOSYS;
return -1;
}
static int syscall_not_implemented_aborts(void)
{
abort();
}
ssize_t _write_r_console(struct _reent *r, int fd, const void * data, size_t size)
{
#if !CONFIG_ESP_CONSOLE_NONE
const char* cdata = (const char*) data;
if (fd == STDOUT_FILENO || fd == STDERR_FILENO) {
for (size_t i = 0; i < size; ++i) {
esp_rom_output_tx_one_char(cdata[i]);
}
return size;
}
#endif //!CONFIG_ESP_CONSOLE_NONE
__errno_r(r) = EBADF;
return -1;
}
ssize_t _read_r_console(struct _reent *r, int fd, void * data, size_t size)
{
#if !CONFIG_ESP_CONSOLE_NONE
char* cdata = (char*) data;
if (fd == STDIN_FILENO) {
size_t received;
for (received = 0; received < size; ++received) {
int status = esp_rom_output_rx_one_char((uint8_t*) &cdata[received]);
if (status != 0) {
break;
}
}
if (received == 0) {
errno = EWOULDBLOCK;
return -1;
}
return received;
}
#endif //!CONFIG_ESP_CONSOLE_NONE
__errno_r(r) = EBADF;
return -1;
}
static ssize_t _fstat_r_console(struct _reent *r, int fd, struct stat * st)
{
if (fd == STDOUT_FILENO || fd == STDERR_FILENO) {
memset(st, 0, sizeof(*st));
/* This needs to be set so that stdout and stderr are line buffered. */
st->st_mode = S_IFCHR;
return 0;
}
__errno_r(r) = EBADF;
return -1;
}
static int _fsync_console(int fd)
{
if (fd == STDOUT_FILENO || fd == STDERR_FILENO) {
esp_rom_output_flush_tx(CONFIG_ESP_CONSOLE_ROM_SERIAL_PORT_NUM);
return 0;
}
errno = EBADF;
return -1;
}
/* The following weak definitions of syscalls will be used unless
* another definition is provided. That definition may come from
* VFS, LWIP, or the application.
*/
ssize_t _read_r(struct _reent *r, int fd, void * dst, size_t size)
__attribute__((weak, alias("_read_r_console")));
ssize_t _write_r(struct _reent *r, int fd, const void * data, size_t size)
__attribute__((weak, alias("_write_r_console")));
int _fstat_r(struct _reent *r, int fd, struct stat *st)
__attribute__((weak, alias("_fstat_r_console")));
int fsync(int fd)
__attribute__((weak, alias("_fsync_console")));
/* The aliases below are to "syscall_not_implemented", which
* doesn't have the same signature as the original function.
* Disable type mismatch warnings for this reason.
*/
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wattribute-alias"
#endif
int _open_r(struct _reent *r, const char * path, int flags, int mode)
__attribute__((weak, alias("syscall_not_implemented")));
int _close_r(struct _reent *r, int fd)
__attribute__((weak, alias("syscall_not_implemented")));
off_t _lseek_r(struct _reent *r, int fd, off_t size, int mode)
__attribute__((weak, alias("syscall_not_implemented")));
int _fcntl_r(struct _reent *r, int fd, int cmd, int arg)
__attribute__((weak, alias("syscall_not_implemented")));
int _stat_r(struct _reent *r, const char * path, struct stat * st)
__attribute__((weak, alias("syscall_not_implemented")));
int _link_r(struct _reent *r, const char* n1, const char* n2)
__attribute__((weak, alias("syscall_not_implemented")));
int _unlink_r(struct _reent *r, const char *path)
__attribute__((weak, alias("syscall_not_implemented")));
int _rename_r(struct _reent *r, const char *src, const char *dst)
__attribute__((weak, alias("syscall_not_implemented")));
int _isatty_r(struct _reent *r, int fd)
__attribute__((weak, alias("syscall_not_implemented")));
/* These functions are not expected to be overridden */
int _system_r(struct _reent *r, const char *str)
__attribute__((alias("syscall_not_implemented")));
int raise(int sig)
__attribute__((alias("syscall_not_implemented_aborts")));
int _raise_r(struct _reent *r, int sig)
__attribute__((alias("syscall_not_implemented_aborts")));
void* _sbrk_r(struct _reent *r, ptrdiff_t sz)
__attribute__((alias("syscall_not_implemented_aborts")));
int _getpid_r(struct _reent *r)
__attribute__((alias("syscall_not_implemented")));
int _kill_r(struct _reent *r, int pid, int sig)
__attribute__((alias("syscall_not_implemented")));
void _exit(int __status)
__attribute__((alias("syscall_not_implemented_aborts")));
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic pop
#endif
/* Similar to syscall_not_implemented, but not taking struct _reent argument */
int system(const char* str)
{
errno = ENOSYS;
return -1;
}
/* Replaces newlib fcntl, which has been compiled without HAVE_FCNTL */
int fcntl(int fd, int cmd, ...)
{
va_list args;
va_start(args, cmd);
int arg = va_arg(args, int);
va_end(args);
struct _reent* r = __getreent();
return _fcntl_r(r, fd, cmd, arg);
}
/* No-op function, used to force linking this file,
instead of the syscalls implementation from libgloss.
*/
void newlib_include_syscalls_impl(void)
{
}
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