1 // SPDX-License-Identifier: GPL-2.0 2 #define __NO_FORTIFY 3 #include <linux/types.h> 4 #include <linux/module.h> 5 6 /* Some of this are builtin function (some are not but could in the future), 7 * so I *must* declare good prototypes for them and then EXPORT them. 8 * The kernel code uses the macro defined by include/linux/string.h, 9 * so I undef macros; the userspace code does not include that and I 10 * add an EXPORT for the glibc one. 11 */ 12 13 #undef strlen 14 #undef strstr 15 #undef memcpy 16 #undef memset 17 18 extern size_t strlen(const char *); 19 extern void *memmove(void *, const void *, size_t); 20 extern void *memset(void *, int, size_t); 21 extern int printf(const char *, ...); 22 23 /* If it's not defined, the export is included in lib/string.c.*/ 24 #ifdef __HAVE_ARCH_STRSTR 25 EXPORT_SYMBOL(strstr); 26 #endif 27 28 #ifndef __x86_64__ 29 extern void *memcpy(void *, const void *, size_t); 30 EXPORT_SYMBOL(memcpy); 31 EXPORT_SYMBOL(memmove); 32 EXPORT_SYMBOL(memset); 33 #endif 34 35 EXPORT_SYMBOL(printf); 36 37 /* Here, instead, I can provide a fake prototype. Yes, someone cares: genksyms. 38 * However, the modules will use the CRC defined *here*, no matter if it is 39 * good; so the versions of these symbols will always match 40 */ 41 #define EXPORT_SYMBOL_PROTO(sym) \ 42 int sym(void) __weak; \ 43 EXPORT_SYMBOL(sym); 44 45 extern void readdir64(void) __attribute__((weak)); 46 EXPORT_SYMBOL(readdir64); 47 extern void truncate64(void) __attribute__((weak)); 48 EXPORT_SYMBOL(truncate64); 49 50 #ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA 51 EXPORT_SYMBOL(vsyscall_ehdr); 52 EXPORT_SYMBOL(vsyscall_end); 53 #endif 54 55 EXPORT_SYMBOL_PROTO(__errno_location); 56 57 EXPORT_SYMBOL_PROTO(access); 58 EXPORT_SYMBOL_PROTO(open); 59 EXPORT_SYMBOL_PROTO(open64); 60 EXPORT_SYMBOL_PROTO(close); 61 EXPORT_SYMBOL_PROTO(read); 62 EXPORT_SYMBOL_PROTO(write); 63 EXPORT_SYMBOL_PROTO(dup2); 64 EXPORT_SYMBOL_PROTO(__xstat); 65 EXPORT_SYMBOL_PROTO(__lxstat); 66 EXPORT_SYMBOL_PROTO(__lxstat64); 67 EXPORT_SYMBOL_PROTO(__fxstat64); 68 EXPORT_SYMBOL_PROTO(lseek); 69 EXPORT_SYMBOL_PROTO(lseek64); 70 EXPORT_SYMBOL_PROTO(chown); 71 EXPORT_SYMBOL_PROTO(fchown); 72 EXPORT_SYMBOL_PROTO(truncate); 73 EXPORT_SYMBOL_PROTO(ftruncate64); 74 EXPORT_SYMBOL_PROTO(utime); 75 EXPORT_SYMBOL_PROTO(utimes); 76 EXPORT_SYMBOL_PROTO(futimes); 77 EXPORT_SYMBOL_PROTO(chmod); 78 EXPORT_SYMBOL_PROTO(fchmod); 79 EXPORT_SYMBOL_PROTO(rename); 80 EXPORT_SYMBOL_PROTO(__xmknod); 81 82 EXPORT_SYMBOL_PROTO(symlink); 83 EXPORT_SYMBOL_PROTO(link); 84 EXPORT_SYMBOL_PROTO(unlink); 85 EXPORT_SYMBOL_PROTO(readlink); 86 87 EXPORT_SYMBOL_PROTO(mkdir); 88 EXPORT_SYMBOL_PROTO(rmdir); 89 EXPORT_SYMBOL_PROTO(opendir); 90 EXPORT_SYMBOL_PROTO(readdir); 91 EXPORT_SYMBOL_PROTO(closedir); 92 EXPORT_SYMBOL_PROTO(seekdir); 93 EXPORT_SYMBOL_PROTO(telldir); 94 95 EXPORT_SYMBOL_PROTO(ioctl); 96 97 EXPORT_SYMBOL_PROTO(pread64); 98 EXPORT_SYMBOL_PROTO(pwrite64); 99 100 EXPORT_SYMBOL_PROTO(statfs); 101 EXPORT_SYMBOL_PROTO(statfs64); 102 103 EXPORT_SYMBOL_PROTO(getuid); 104 105 EXPORT_SYMBOL_PROTO(fsync); 106 EXPORT_SYMBOL_PROTO(fdatasync); 107 108 EXPORT_SYMBOL_PROTO(lstat64); 109 EXPORT_SYMBOL_PROTO(fstat64); 110 EXPORT_SYMBOL_PROTO(mknod); 111 112 /* Export symbols used by GCC for the stack protector. */ 113 extern void __stack_smash_handler(void *) __attribute__((weak)); 114 EXPORT_SYMBOL(__stack_smash_handler); 115 116 extern long __guard __attribute__((weak)); 117 EXPORT_SYMBOL(__guard); 118 119 #ifdef _FORTIFY_SOURCE 120 extern int __sprintf_chk(char *str, int flag, size_t strlen, const char *format); 121 EXPORT_SYMBOL(__sprintf_chk); 122 #endif 123