user_syms.c (3298B)
1// SPDX-License-Identifier: GPL-2.0 2#include <linux/types.h> 3#include <linux/module.h> 4 5/* Some of this are builtin function (some are not but could in the future), 6 * so I *must* declare good prototypes for them and then EXPORT them. 7 * The kernel code uses the macro defined by include/linux/string.h, 8 * so I undef macros; the userspace code does not include that and I 9 * add an EXPORT for the glibc one. 10 */ 11 12#undef strlen 13#undef strstr 14#undef memcpy 15#undef memset 16 17extern size_t strlen(const char *); 18extern void *memmove(void *, const void *, size_t); 19extern void *memset(void *, int, size_t); 20extern int printf(const char *, ...); 21 22/* If it's not defined, the export is included in lib/string.c.*/ 23#ifdef __HAVE_ARCH_STRSTR 24EXPORT_SYMBOL(strstr); 25#endif 26 27#ifndef __x86_64__ 28extern void *memcpy(void *, const void *, size_t); 29EXPORT_SYMBOL(memcpy); 30#endif 31 32EXPORT_SYMBOL(memmove); 33EXPORT_SYMBOL(memset); 34EXPORT_SYMBOL(printf); 35 36/* Here, instead, I can provide a fake prototype. Yes, someone cares: genksyms. 37 * However, the modules will use the CRC defined *here*, no matter if it is 38 * good; so the versions of these symbols will always match 39 */ 40#define EXPORT_SYMBOL_PROTO(sym) \ 41 int sym(void); \ 42 EXPORT_SYMBOL(sym); 43 44extern void readdir64(void) __attribute__((weak)); 45EXPORT_SYMBOL(readdir64); 46extern void truncate64(void) __attribute__((weak)); 47EXPORT_SYMBOL(truncate64); 48 49#ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA 50EXPORT_SYMBOL(vsyscall_ehdr); 51EXPORT_SYMBOL(vsyscall_end); 52#endif 53 54EXPORT_SYMBOL_PROTO(__errno_location); 55 56EXPORT_SYMBOL_PROTO(access); 57EXPORT_SYMBOL_PROTO(open); 58EXPORT_SYMBOL_PROTO(open64); 59EXPORT_SYMBOL_PROTO(close); 60EXPORT_SYMBOL_PROTO(read); 61EXPORT_SYMBOL_PROTO(write); 62EXPORT_SYMBOL_PROTO(dup2); 63EXPORT_SYMBOL_PROTO(__xstat); 64EXPORT_SYMBOL_PROTO(__lxstat); 65EXPORT_SYMBOL_PROTO(__lxstat64); 66EXPORT_SYMBOL_PROTO(__fxstat64); 67EXPORT_SYMBOL_PROTO(lseek); 68EXPORT_SYMBOL_PROTO(lseek64); 69EXPORT_SYMBOL_PROTO(chown); 70EXPORT_SYMBOL_PROTO(fchown); 71EXPORT_SYMBOL_PROTO(truncate); 72EXPORT_SYMBOL_PROTO(ftruncate64); 73EXPORT_SYMBOL_PROTO(utime); 74EXPORT_SYMBOL_PROTO(utimes); 75EXPORT_SYMBOL_PROTO(futimes); 76EXPORT_SYMBOL_PROTO(chmod); 77EXPORT_SYMBOL_PROTO(fchmod); 78EXPORT_SYMBOL_PROTO(rename); 79EXPORT_SYMBOL_PROTO(__xmknod); 80 81EXPORT_SYMBOL_PROTO(symlink); 82EXPORT_SYMBOL_PROTO(link); 83EXPORT_SYMBOL_PROTO(unlink); 84EXPORT_SYMBOL_PROTO(readlink); 85 86EXPORT_SYMBOL_PROTO(mkdir); 87EXPORT_SYMBOL_PROTO(rmdir); 88EXPORT_SYMBOL_PROTO(opendir); 89EXPORT_SYMBOL_PROTO(readdir); 90EXPORT_SYMBOL_PROTO(closedir); 91EXPORT_SYMBOL_PROTO(seekdir); 92EXPORT_SYMBOL_PROTO(telldir); 93 94EXPORT_SYMBOL_PROTO(ioctl); 95 96EXPORT_SYMBOL_PROTO(pread64); 97EXPORT_SYMBOL_PROTO(pwrite64); 98 99EXPORT_SYMBOL_PROTO(statfs); 100EXPORT_SYMBOL_PROTO(statfs64); 101 102EXPORT_SYMBOL_PROTO(getuid); 103 104EXPORT_SYMBOL_PROTO(fsync); 105EXPORT_SYMBOL_PROTO(fdatasync); 106 107EXPORT_SYMBOL_PROTO(lstat64); 108EXPORT_SYMBOL_PROTO(fstat64); 109EXPORT_SYMBOL_PROTO(mknod); 110 111/* Export symbols used by GCC for the stack protector. */ 112extern void __stack_smash_handler(void *) __attribute__((weak)); 113EXPORT_SYMBOL(__stack_smash_handler); 114 115extern long __guard __attribute__((weak)); 116EXPORT_SYMBOL(__guard); 117 118#ifdef _FORTIFY_SOURCE 119extern int __sprintf_chk(char *str, int flag, size_t strlen, const char *format); 120EXPORT_SYMBOL(__sprintf_chk); 121#endif