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
 18extern size_t strlen(const char *);
 19extern void *memmove(void *, const void *, size_t);
 20extern void *memset(void *, int, size_t);
 21extern int printf(const char *, ...);
 22
 23/* If it's not defined, the export is included in lib/string.c.*/
 24#ifdef __HAVE_ARCH_STRSTR
 25EXPORT_SYMBOL(strstr);
 26#endif
 27
 28#ifndef __x86_64__
 29extern void *memcpy(void *, const void *, size_t);
 30EXPORT_SYMBOL(memcpy);
 31EXPORT_SYMBOL(memmove);
 32EXPORT_SYMBOL(memset);
 33#endif
 34
 
 
 35EXPORT_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);                  \
 43	EXPORT_SYMBOL(sym);
 44
 45extern void readdir64(void) __attribute__((weak));
 46EXPORT_SYMBOL(readdir64);
 47extern void truncate64(void) __attribute__((weak));
 48EXPORT_SYMBOL(truncate64);
 49
 50#ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA
 51EXPORT_SYMBOL(vsyscall_ehdr);
 52EXPORT_SYMBOL(vsyscall_end);
 53#endif
 54
 55EXPORT_SYMBOL_PROTO(__errno_location);
 56
 57EXPORT_SYMBOL_PROTO(access);
 58EXPORT_SYMBOL_PROTO(open);
 59EXPORT_SYMBOL_PROTO(open64);
 60EXPORT_SYMBOL_PROTO(close);
 61EXPORT_SYMBOL_PROTO(read);
 62EXPORT_SYMBOL_PROTO(write);
 63EXPORT_SYMBOL_PROTO(dup2);
 64EXPORT_SYMBOL_PROTO(__xstat);
 65EXPORT_SYMBOL_PROTO(__lxstat);
 66EXPORT_SYMBOL_PROTO(__lxstat64);
 67EXPORT_SYMBOL_PROTO(__fxstat64);
 68EXPORT_SYMBOL_PROTO(lseek);
 69EXPORT_SYMBOL_PROTO(lseek64);
 70EXPORT_SYMBOL_PROTO(chown);
 71EXPORT_SYMBOL_PROTO(fchown);
 72EXPORT_SYMBOL_PROTO(truncate);
 73EXPORT_SYMBOL_PROTO(ftruncate64);
 74EXPORT_SYMBOL_PROTO(utime);
 75EXPORT_SYMBOL_PROTO(utimes);
 76EXPORT_SYMBOL_PROTO(futimes);
 77EXPORT_SYMBOL_PROTO(chmod);
 78EXPORT_SYMBOL_PROTO(fchmod);
 79EXPORT_SYMBOL_PROTO(rename);
 80EXPORT_SYMBOL_PROTO(__xmknod);
 81
 82EXPORT_SYMBOL_PROTO(symlink);
 83EXPORT_SYMBOL_PROTO(link);
 84EXPORT_SYMBOL_PROTO(unlink);
 85EXPORT_SYMBOL_PROTO(readlink);
 86
 87EXPORT_SYMBOL_PROTO(mkdir);
 88EXPORT_SYMBOL_PROTO(rmdir);
 89EXPORT_SYMBOL_PROTO(opendir);
 90EXPORT_SYMBOL_PROTO(readdir);
 91EXPORT_SYMBOL_PROTO(closedir);
 92EXPORT_SYMBOL_PROTO(seekdir);
 93EXPORT_SYMBOL_PROTO(telldir);
 94
 95EXPORT_SYMBOL_PROTO(ioctl);
 96
 97EXPORT_SYMBOL_PROTO(pread64);
 98EXPORT_SYMBOL_PROTO(pwrite64);
 99
100EXPORT_SYMBOL_PROTO(statfs);
101EXPORT_SYMBOL_PROTO(statfs64);
102
103EXPORT_SYMBOL_PROTO(getuid);
104
105EXPORT_SYMBOL_PROTO(fsync);
106EXPORT_SYMBOL_PROTO(fdatasync);
107
108EXPORT_SYMBOL_PROTO(lstat64);
109EXPORT_SYMBOL_PROTO(fstat64);
110EXPORT_SYMBOL_PROTO(mknod);
111
112/* Export symbols used by GCC for the stack protector. */
113extern void __stack_smash_handler(void *) __attribute__((weak));
114EXPORT_SYMBOL(__stack_smash_handler);
115
116extern long __guard __attribute__((weak));
117EXPORT_SYMBOL(__guard);
118
119#ifdef _FORTIFY_SOURCE
120extern int __sprintf_chk(char *str, int flag, size_t strlen, const char *format);
121EXPORT_SYMBOL(__sprintf_chk);
122#endif

  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