xref: /third_party/musl/porting/linux/user/src/internal/libc.h

/**
 * Copyright (c) 2022 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef LIBC_H
#define LIBC_H

#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#include <link.h>
#include <locale.h>
struct __locale_map;

struct __locale_struct {
    const struct __locale_map *cat[LC_ALL];
};

struct tls_module {
    struct tls_module *next;
    void *image;
    size_t len, size, align, offset;
};

struct __libc {
	char can_do_threads;
	char threaded;
	char secure;
	volatile signed char need_locks;
	int threads_minus_1;
	size_t *auxv;
	struct tls_module *tls_head;
	size_t tls_size, tls_align, tls_cnt;
	size_t page_size;
	struct __locale_struct global_locale;
#ifdef ENABLE_HWASAN
	void (*load_hook)(unsigned long int base, const Elf64_Phdr* phdr, int phnum);
	void (*unload_hook)(unsigned long int base, const Elf64_Phdr* phdr, int phnum);
#endif
};

#ifndef PAGE_SIZE
#define PAGE_SIZE libc.page_size
#endif

extern hidden struct __libc __libc;
#define libc __libc

hidden void __init_libc(char **, char *);
hidden void __init_tls(size_t *);
hidden void __init_ssp(void *);
hidden void __libc_start_init(void);
hidden void __funcs_on_exit(void);
hidden void __funcs_on_quick_exit(void);
hidden void __libc_exit_fini(void);
hidden void __fork_handler(int);

extern hidden size_t __hwcap;
extern hidden size_t __sysinfo;
extern char *__progname, *__progname_full;

extern hidden const char __libc_version[];

hidden void __synccall(void (*)(void *), void *);
hidden int __setxid(int, int, int, int);

#endif