1 /* 2 * SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #pragma once 8 9 #include <sys/lock.h> 10 #include <stddef.h> 11 #include <stdint.h> 12 #include <stdio.h> 13 #include <stdarg.h> 14 #include <reent.h> 15 #include <errno.h> 16 17 #ifdef __cplusplus 18 extern "C" { 19 #endif 20 21 /** 22 * @brief ESP32-S3 ROM code contains implementations of some of C library functions. 23 * Whenever a function in ROM needs to use a syscall, it calls a pointer to the corresponding syscall 24 * implementation defined in the following struct. 25 * 26 * The table itself, by default, is not allocated in RAM. There are two pointers, `syscall_table_ptr_pro` and 27 * `syscall_table_ptr_app`, which can be set to point to the locations of syscall tables of CPU 0 (aka PRO CPU) 28 * and CPU 1 (aka APP CPU). Location of these pointers in .bss segment of ROM code is defined in linker script. 29 * 30 * So, before using any of the C library functions (except for pure functions and memcpy/memset functions), 31 * application must allocate syscall table structure for each CPU being used, and populate it with pointers 32 * to actual implementations of corresponding syscalls. 33 * 34 */ 35 struct syscall_stub_table 36 { 37 struct _reent* (*__getreent)(void); 38 void* (*_malloc_r)(struct _reent *r, size_t); 39 void (*_free_r)(struct _reent *r, void*); 40 void* (*_realloc_r)(struct _reent *r, void*, size_t); 41 void* (*_calloc_r)(struct _reent *r, size_t, size_t); 42 void (*_abort)(void); 43 int (*_system_r)(struct _reent *r, const char*); 44 int (*_rename_r)(struct _reent *r, const char*, const char*); 45 clock_t (*_times_r)(struct _reent *r, struct tms *); 46 int (*_gettimeofday_r) (struct _reent *r, struct timeval *, void *); 47 void (*_raise_r)(struct _reent *r); 48 int (*_unlink_r)(struct _reent *r, const char*); 49 int (*_link_r)(struct _reent *r, const char*, const char*); 50 int (*_stat_r)(struct _reent *r, const char*, struct stat *); 51 int (*_fstat_r)(struct _reent *r, int, struct stat *); 52 void* (*_sbrk_r)(struct _reent *r, ptrdiff_t); 53 int (*_getpid_r)(struct _reent *r); 54 int (*_kill_r)(struct _reent *r, int, int); 55 void (*_exit_r)(struct _reent *r, int); 56 int (*_close_r)(struct _reent *r, int); 57 int (*_open_r)(struct _reent *r, const char *, int, int); 58 int (*_write_r)(struct _reent *r, int, const void *, int); 59 int (*_lseek_r)(struct _reent *r, int, int, int); 60 int (*_read_r)(struct _reent *r, int, void *, int); 61 void (*_retarget_lock_init)(_LOCK_T *lock); 62 void (*_retarget_lock_init_recursive)(_LOCK_T *lock); 63 void (*_retarget_lock_close)(_LOCK_T lock); 64 void (*_retarget_lock_close_recursive)(_LOCK_T lock); 65 void (*_retarget_lock_acquire)(_LOCK_T lock); 66 void (*_retarget_lock_acquire_recursive)(_LOCK_T lock); 67 int (*_retarget_lock_try_acquire)(_LOCK_T lock); 68 int (*_retarget_lock_try_acquire_recursive)(_LOCK_T lock); 69 void (*_retarget_lock_release)(_LOCK_T lock); 70 void (*_retarget_lock_release_recursive)(_LOCK_T lock); 71 int (*_printf_float)(struct _reent *data, void *pdata, FILE * fp, int (*pfunc) (struct _reent *, FILE *, const char *, size_t len), va_list * ap); 72 int (*_scanf_float) (struct _reent *rptr, void *pdata, FILE *fp, va_list *ap); 73 void (*__assert_func) (const char *file, int line, const char * func, const char *failedexpr) __attribute__((__noreturn__)); 74 void (*__sinit) (struct _reent *r); 75 void (*_cleanup_r) (struct _reent* r); 76 }; 77 78 extern struct syscall_stub_table *syscall_table_ptr; 79 #define syscall_table_ptr_pro syscall_table_ptr 80 #define syscall_table_ptr_app syscall_table_ptr 81 82 #ifdef __cplusplus 83 } // extern "C" 84 #endif 85
