newlib: provide default implementations for more syscalls
This commit is contained in:
Ivan Grokhotkov
parent
1f1ce38e5f
commit
4cb10ea7c2
1 changed files with 92 additions and 33 deletions
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@ -1,4 +1,4 @@
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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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@ -12,7 +12,6 @@
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdarg.h>
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@ -21,51 +20,111 @@
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#include <errno.h>
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#include <reent.h>
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#include <sys/fcntl.h>
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#include "sdkconfig.h"
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#if CONFIG_IDF_TARGET_ESP32
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#include "esp32/rom/uart.h"
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#elif CONFIG_IDF_TARGET_ESP32S2
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#include "esp32s2/rom/uart.h"
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#endif
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int system(const char* str)
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static int syscall_not_implemented(void)
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{
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errno = ENOSYS;
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return -1;
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}
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static int syscall_not_implemented_aborts(void)
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{
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abort();
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}
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ssize_t _write_r_console(struct _reent *r, int fd, const void * data, size_t size)
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{
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const char* cdata = (const char*) data;
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if (fd == STDOUT_FILENO || fd == STDERR_FILENO) {
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for (size_t i = 0; i < size; ++i) {
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uart_tx_one_char(cdata[i]);
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}
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return size;
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}
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errno = EBADF;
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return -1;
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}
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ssize_t _read_r_console(struct _reent *r, int fd, void * data, size_t size)
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{
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char* cdata = (char*) data;
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if (fd == STDIN_FILENO) {
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size_t received;
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for (received = 0; received < size; ++received) {
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int status = uart_rx_one_char((uint8_t*) &cdata[received]);
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if (status != 0) {
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break;
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}
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}
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return received;
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}
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errno = EBADF;
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return -1;
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}
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/* The following weak definitions of syscalls will be used unless
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* another definition is provided. That definition may come from
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* VFS, LWIP, or the application.
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*/
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ssize_t _read_r(struct _reent *r, int fd, void * dst, size_t size)
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__attribute__((weak,alias("_read_r_console")));
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ssize_t _write_r(struct _reent *r, int fd, const void * data, size_t size)
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__attribute__((weak,alias("_write_r_console")));
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/* The aliases below are to "syscall_not_implemented", which
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* doesn't have the same signature as the original function.
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* Disable type mismatch warnings for this reason.
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*/
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wattribute-alias"
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int _open_r(struct _reent *r, const char * path, int flags, int mode)
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__attribute__((weak,alias("syscall_not_implemented")));
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int _close_r(struct _reent *r, int fd)
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__attribute__((weak,alias("syscall_not_implemented")));
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off_t _lseek_r(struct _reent *r, int fd, off_t size, int mode)
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__attribute__((weak,alias("syscall_not_implemented")));
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int _fcntl_r(struct _reent *r, int fd, int cmd, int arg)
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__attribute__((weak,alias("syscall_not_implemented")));
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int _fstat_r(struct _reent *r, int fd, struct stat * st)
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__attribute__((weak,alias("syscall_not_implemented")));
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int _stat_r(struct _reent *r, const char * path, struct stat * st)
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__attribute__((weak,alias("syscall_not_implemented")));
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int _link_r(struct _reent *r, const char* n1, const char* n2)
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__attribute__((weak,alias("syscall_not_implemented")));
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int _unlink_r(struct _reent *r, const char *path)
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__attribute__((weak,alias("syscall_not_implemented")));
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int _rename_r(struct _reent *r, const char *src, const char *dst)
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__attribute__((weak,alias("syscall_not_implemented")));
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/* These functions are not expected to be overridden */
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int system(const char* str)
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__attribute__((alias("syscall_not_implemented")));
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int _system_r(struct _reent *r, const char *str)
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{
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__errno_r(r) = ENOSYS;
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return -1;
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}
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__attribute__((alias("syscall_not_implemented")));
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int raise(int sig)
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{
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abort();
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}
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__attribute__((alias("syscall_not_implemented_aborts")));
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int _raise_r(struct _reent *r, int sig)
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{
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abort();
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}
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__attribute__((alias("syscall_not_implemented_aborts")));
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void* _sbrk_r(struct _reent *r, ptrdiff_t sz)
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{
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abort();
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}
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__attribute__((alias("syscall_not_implemented_aborts")));
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int _getpid_r(struct _reent *r)
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{
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__errno_r(r) = ENOSYS;
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return -1;
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}
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__attribute__((alias("syscall_not_implemented")));
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int _kill_r(struct _reent *r, int pid, int sig)
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{
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__errno_r(r) = ENOSYS;
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return -1;
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}
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__attribute__((alias("syscall_not_implemented")));
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void _exit(int __status)
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{
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abort();
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}
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__attribute__((alias("syscall_not_implemented_aborts")));
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#pragma GCC diagnostic pop
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/* Replaces newlib fcntl, which has been compiled without HAVE_FCNTL */
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int fcntl(int fd, int cmd, ...)
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