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https://github.com/0xFEEDC0DE64/arduino-esp32.git
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90 lines
3.8 KiB
C
90 lines
3.8 KiB
C
// Copyright 2015-2016 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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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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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#ifndef _ROM_LIBC_STUBS_H_
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#define _ROM_LIBC_STUBS_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <reent.h>
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#include <errno.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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ESP32 ROM code contains implementations of some of C library functions.
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Whenever a function in ROM needs to use a syscall, it calls a pointer to the corresponding syscall
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implementation defined in the following struct.
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The table itself, by default, is not allocated in RAM. There are two pointers, `syscall_table_ptr_pro` and
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`syscall_table_ptr_app`, which can be set to point to the locations of syscall tables of CPU 0 (aka PRO CPU)
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and CPU 1 (aka APP CPU). Location of these pointers in .bss segment of ROM code is defined in linker script.
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So, before using any of the C library functions (except for pure functions and memcpy/memset functions),
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application must allocate syscall table structure for each CPU being used, and populate it with pointers
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to actual implementations of corresponding syscalls.
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*/
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struct syscall_stub_table
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{
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struct _reent* (*__getreent)(void);
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void* (*_malloc_r)(struct _reent *r, size_t);
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void (*_free_r)(struct _reent *r, void*);
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void* (*_realloc_r)(struct _reent *r, void*, size_t);
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void* (*_calloc_r)(struct _reent *r, size_t, size_t);
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void (*_abort)(void);
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int (*_system_r)(struct _reent *r, const char*);
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int (*_rename_r)(struct _reent *r, const char*, const char*);
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clock_t (*_times_r)(struct _reent *r, struct tms *);
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int (*_gettimeofday_r) (struct _reent *r, struct timeval *, void *);
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void (*_raise_r)(struct _reent *r);
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int (*_unlink_r)(struct _reent *r, const char*);
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int (*_link_r)(struct _reent *r, const char*, const char*);
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int (*_stat_r)(struct _reent *r, const char*, struct stat *);
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int (*_fstat_r)(struct _reent *r, int, struct stat *);
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void* (*_sbrk_r)(struct _reent *r, ptrdiff_t);
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int (*_getpid_r)(struct _reent *r);
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int (*_kill_r)(struct _reent *r, int, int);
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void (*_exit_r)(struct _reent *r, int);
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int (*_close_r)(struct _reent *r, int);
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int (*_open_r)(struct _reent *r, const char *, int, int);
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int (*_write_r)(struct _reent *r, int, const void *, int);
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int (*_lseek_r)(struct _reent *r, int, int, int);
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int (*_read_r)(struct _reent *r, int, void *, int);
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void (*_lock_init)(_lock_t *lock);
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void (*_lock_init_recursive)(_lock_t *lock);
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void (*_lock_close)(_lock_t *lock);
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void (*_lock_close_recursive)(_lock_t *lock);
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void (*_lock_acquire)(_lock_t *lock);
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void (*_lock_acquire_recursive)(_lock_t *lock);
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int (*_lock_try_acquire)(_lock_t *lock);
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int (*_lock_try_acquire_recursive)(_lock_t *lock);
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void (*_lock_release)(_lock_t *lock);
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void (*_lock_release_recursive)(_lock_t *lock);
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int (*_printf_float)(struct _reent *data, void *pdata, FILE * fp, int (*pfunc) (struct _reent *, FILE *, _CONST char *, size_t len), va_list * ap);
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int (*_scanf_float) (struct _reent *rptr, void *pdata, FILE *fp, va_list *ap);
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};
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extern struct syscall_stub_table* syscall_table_ptr_pro;
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extern struct syscall_stub_table* syscall_table_ptr_app;
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif /* _ROM_LIBC_STUBS_H_ */
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