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 17 extern size_t strlen(const char *); 18 extern void *memmove(void *, const void *, size_t); 19 extern void *memset(void *, int, size_t); 20 extern int printf(const char *, ...); 21 22 /* If it's not defined, the export is included in lib/string.c.*/ 23 #ifdef __HAVE_ARCH_STRSTR 24 EXPORT_SYMBOL(strstr); 25 #endif 26 27 #ifndef __x86_64__ 28 extern void *memcpy(void *, const void *, size_t); 29 EXPORT_SYMBOL(memcpy); 30 #endif 31 32 EXPORT_SYMBOL(memmove); 33 EXPORT_SYMBOL(memset); 34 EXPORT_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 44 extern void readdir64(void) __attribute__((weak)); 45 EXPORT_SYMBOL(readdir64); 46 extern void truncate64(void) __attribute__((weak)); 47 EXPORT_SYMBOL(truncate64); 48 49 #ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA 50 EXPORT_SYMBOL(vsyscall_ehdr); 51 EXPORT_SYMBOL(vsyscall_end); 52 #endif 53 54 EXPORT_SYMBOL_PROTO(__errno_location); 55 56 EXPORT_SYMBOL_PROTO(access); 57 EXPORT_SYMBOL_PROTO(open); 58 EXPORT_SYMBOL_PROTO(open64); 59 EXPORT_SYMBOL_PROTO(close); 60 EXPORT_SYMBOL_PROTO(read); 61 EXPORT_SYMBOL_PROTO(write); 62 EXPORT_SYMBOL_PROTO(dup2); 63 EXPORT_SYMBOL_PROTO(__xstat); 64 EXPORT_SYMBOL_PROTO(__lxstat); 65 EXPORT_SYMBOL_PROTO(__lxstat64); 66 EXPORT_SYMBOL_PROTO(__fxstat64); 67 EXPORT_SYMBOL_PROTO(lseek); 68 EXPORT_SYMBOL_PROTO(lseek64); 69 EXPORT_SYMBOL_PROTO(chown); 70 EXPORT_SYMBOL_PROTO(fchown); 71 EXPORT_SYMBOL_PROTO(truncate); 72 EXPORT_SYMBOL_PROTO(ftruncate64); 73 EXPORT_SYMBOL_PROTO(utime); 74 EXPORT_SYMBOL_PROTO(utimes); 75 EXPORT_SYMBOL_PROTO(futimes); 76 EXPORT_SYMBOL_PROTO(chmod); 77 EXPORT_SYMBOL_PROTO(fchmod); 78 EXPORT_SYMBOL_PROTO(rename); 79 EXPORT_SYMBOL_PROTO(__xmknod); 80 81 EXPORT_SYMBOL_PROTO(symlink); 82 EXPORT_SYMBOL_PROTO(link); 83 EXPORT_SYMBOL_PROTO(unlink); 84 EXPORT_SYMBOL_PROTO(readlink); 85 86 EXPORT_SYMBOL_PROTO(mkdir); 87 EXPORT_SYMBOL_PROTO(rmdir); 88 EXPORT_SYMBOL_PROTO(opendir); 89 EXPORT_SYMBOL_PROTO(readdir); 90 EXPORT_SYMBOL_PROTO(closedir); 91 EXPORT_SYMBOL_PROTO(seekdir); 92 EXPORT_SYMBOL_PROTO(telldir); 93 94 EXPORT_SYMBOL_PROTO(ioctl); 95 96 EXPORT_SYMBOL_PROTO(pread64); 97 EXPORT_SYMBOL_PROTO(pwrite64); 98 99 EXPORT_SYMBOL_PROTO(statfs); 100 EXPORT_SYMBOL_PROTO(statfs64); 101 102 EXPORT_SYMBOL_PROTO(getuid); 103 104 EXPORT_SYMBOL_PROTO(fsync); 105 EXPORT_SYMBOL_PROTO(fdatasync); 106 107 EXPORT_SYMBOL_PROTO(lstat64); 108 EXPORT_SYMBOL_PROTO(fstat64); 109 EXPORT_SYMBOL_PROTO(mknod); 110 111 /* Export symbols used by GCC for the stack protector. */ 112 extern void __stack_smash_handler(void *) __attribute__((weak)); 113 EXPORT_SYMBOL(__stack_smash_handler); 114 115 extern long __guard __attribute__((weak)); 116 EXPORT_SYMBOL(__guard); 117 118 #ifdef _FORTIFY_SOURCE 119 extern int __sprintf_chk(char *str, int flag, size_t strlen, const char *format); 120 EXPORT_SYMBOL(__sprintf_chk); 121 #endif 122