esp-idf/components/newlib/newlib_init.c

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/*
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
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#include "sdkconfig.h"
#include <string.h>
#include <stdbool.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/signal.h>
#include <sys/unistd.h>
#include <sys/reent.h>
#include <assert.h>
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#include "esp_newlib.h"
#include "esp_attr.h"
#include "soc/soc_caps.h"
#include "esp_rom_caps.h"
#if CONFIG_IDF_TARGET_ESP32
#include "esp32/rom/libc_stubs.h"
#elif CONFIG_IDF_TARGET_ESP32S2
#include "esp32s2/rom/libc_stubs.h"
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#elif CONFIG_IDF_TARGET_ESP32S3
#include "esp32s3/rom/libc_stubs.h"
#elif CONFIG_IDF_TARGET_ESP32C3
#include "esp32c3/rom/libc_stubs.h"
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#elif CONFIG_IDF_TARGET_ESP32C2
#include "esp32c2/rom/libc_stubs.h"
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#elif CONFIG_IDF_TARGET_ESP32C6
#include "esp32c6/rom/libc_stubs.h"
#elif CONFIG_IDF_TARGET_ESP32H2
#include "esp32h2/rom/libc_stubs.h"
#elif CONFIG_IDF_TARGET_ESP32P4
#include "esp32p4/rom/libc_stubs.h"
#endif
extern int _printf_float(struct _reent *rptr,
void *pdata,
FILE * fp,
int (*pfunc) (struct _reent *, FILE *, const char *, size_t len),
va_list * ap);
extern int _scanf_float(struct _reent *rptr,
void *pdata,
FILE *fp,
va_list *ap);
static void raise_r_stub(struct _reent *rptr)
{
_raise_r(rptr, 0);
}
static void esp_cleanup_r (struct _reent *rptr)
{
if (_REENT_STDIN(rptr) != _REENT_STDIN(_GLOBAL_REENT)) {
_fclose_r(rptr, _REENT_STDIN(rptr));
}
if (_REENT_STDOUT(rptr) != _REENT_STDOUT(_GLOBAL_REENT)) {
_fclose_r(rptr, _REENT_STDOUT(rptr));
}
if (_REENT_STDERR(rptr) !=_REENT_STDERR(_GLOBAL_REENT)) {
_fclose_r(rptr, _REENT_STDERR(rptr));
}
}
static struct syscall_stub_table s_stub_table = {
.__getreent = &__getreent,
._malloc_r = &_malloc_r,
._free_r = &_free_r,
._realloc_r = &_realloc_r,
._calloc_r = &_calloc_r,
._abort = &abort,
._system_r = &_system_r,
._rename_r = &_rename_r,
._times_r = &_times_r,
._gettimeofday_r = &_gettimeofday_r,
._raise_r = &raise_r_stub,
._unlink_r = &_unlink_r,
._link_r = &_link_r,
._stat_r = &_stat_r,
._fstat_r = &_fstat_r,
._sbrk_r = &_sbrk_r,
._getpid_r = &_getpid_r,
._kill_r = &_kill_r,
._exit_r = NULL, // never called in ROM
._close_r = &_close_r,
._open_r = &_open_r,
._write_r = (int (*)(struct _reent *r, int, const void *, int)) &_write_r,
._lseek_r = (int (*)(struct _reent *r, int, int, int)) &_lseek_r,
._read_r = (int (*)(struct _reent *r, int, void *, int)) &_read_r,
#if ESP_ROM_HAS_RETARGETABLE_LOCKING
._retarget_lock_init = &__retarget_lock_init,
._retarget_lock_init_recursive = &__retarget_lock_init_recursive,
._retarget_lock_close = &__retarget_lock_close,
._retarget_lock_close_recursive = &__retarget_lock_close_recursive,
._retarget_lock_acquire = &__retarget_lock_acquire,
._retarget_lock_acquire_recursive = &__retarget_lock_acquire_recursive,
._retarget_lock_try_acquire = &__retarget_lock_try_acquire,
._retarget_lock_try_acquire_recursive = &__retarget_lock_try_acquire_recursive,
._retarget_lock_release = &__retarget_lock_release,
._retarget_lock_release_recursive = &__retarget_lock_release_recursive,
#else
._lock_init = &_lock_init,
._lock_init_recursive = &_lock_init_recursive,
._lock_close = &_lock_close,
._lock_close_recursive = &_lock_close_recursive,
._lock_acquire = &_lock_acquire,
._lock_acquire_recursive = &_lock_acquire_recursive,
._lock_try_acquire = &_lock_try_acquire,
._lock_try_acquire_recursive = &_lock_try_acquire_recursive,
._lock_release = &_lock_release,
._lock_release_recursive = &_lock_release_recursive,
#endif
#ifdef CONFIG_NEWLIB_NANO_FORMAT
._printf_float = &_printf_float,
._scanf_float = &_scanf_float,
#else
._printf_float = NULL,
._scanf_float = NULL,
#endif
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#if CONFIG_IDF_TARGET_ESP32S3 || CONFIG_IDF_TARGET_ESP32C3 \
|| CONFIG_IDF_TARGET_ESP32C2 || CONFIG_IDF_TARGET_ESP32C6 || CONFIG_IDF_TARGET_ESP32H2 || CONFIG_IDF_TARGET_ESP32P4
/* TODO IDF-2570 : mark that this assert failed in ROM, to avoid confusion between IDF & ROM
assertion failures (as function names & source file names will be similar)
*/
.__assert_func = __assert_func,
/* We don't expect either ROM code to ever call __sinit, so it's implemented as abort() for now.
__sinit may be called in IDF side only if /dev/console used as input/output. It called only
once for _GLOBAL_REENT. Then reuse std file pointers from _GLOBAL_REENT in another reents.
See esp_newlib_init() and esp_reent_init() for details.
*/
.__sinit = (void *)abort,
._cleanup_r = &esp_cleanup_r,
#endif
};
void esp_newlib_init(void)
{
#if CONFIG_IDF_TARGET_ESP32
syscall_table_ptr_pro = syscall_table_ptr_app = &s_stub_table;
#elif CONFIG_IDF_TARGET_ESP32S2
syscall_table_ptr_pro = &s_stub_table;
#else
syscall_table_ptr = &s_stub_table;
#endif
#if __NEWLIB__ > 4 || ( __NEWLIB__ == 4 && __NEWLIB_MINOR__ > 1 ) /* TODO: IDF-8134 */
memset(&__sglue, 0, sizeof(__sglue));
_global_impure_ptr = _GLOBAL_REENT;
#else
static struct _reent s_reent;
_GLOBAL_REENT = &s_reent;
#endif
/* Ensure that the initialization of sfp is prevented until esp_newlib_init_global_stdio() is explicitly invoked. */
_GLOBAL_REENT->__cleanup = esp_cleanup_r;
_REENT_SDIDINIT(_GLOBAL_REENT) = 1;
environ = malloc(sizeof(char*));
if (environ == 0) {
// if allocation fails this early in startup process, there's nothing else other than to panic.
abort();
}
environ[0] = NULL;
esp_newlib_locks_init();
}
void esp_setup_newlib_syscalls(void) __attribute__((alias("esp_newlib_init")));
void esp_newlib_init_global_stdio(const char *stdio_dev)
{
if (stdio_dev == NULL)
{
_GLOBAL_REENT->__cleanup = NULL;
_REENT_SDIDINIT(_GLOBAL_REENT) = 0;
__sinit(_GLOBAL_REENT);
_GLOBAL_REENT->__cleanup = esp_cleanup_r;
_REENT_SDIDINIT(_GLOBAL_REENT) = 1;
} else {
_REENT_STDIN(_GLOBAL_REENT) = fopen(stdio_dev, "r");
_REENT_STDOUT(_GLOBAL_REENT) = fopen(stdio_dev, "w");
_REENT_STDERR(_GLOBAL_REENT) = fopen(stdio_dev, "w");
#if ESP_ROM_NEEDS_SWSETUP_WORKAROUND
/*
- This workaround for printf functions using 32-bit time_t after the 64-bit time_t upgrade
- The 32-bit time_t usage is triggered through ROM Newlib functions printf related functions calling __swsetup_r() on
the first call to a particular file pointer (i.e., stdin, stdout, stderr)
- Thus, we call the toolchain version of __swsetup_r() now (before any printf calls are made) to setup all of the
file pointers. Thus, the ROM newlib code will never call the ROM version of __swsetup_r().
- See IDFGH-7728 for more details
*/
extern int __swsetup_r (struct _reent *, FILE *);
__swsetup_r(_GLOBAL_REENT, _REENT_STDIN(_GLOBAL_REENT));
__swsetup_r(_GLOBAL_REENT, _REENT_STDOUT(_GLOBAL_REENT));
__swsetup_r(_GLOBAL_REENT, _REENT_STDERR(_GLOBAL_REENT));
#endif /* ESP_ROM_NEEDS_SWSETUP_WORKAROUND */
}
}