1// SPDX-License-Identifier: GPL-2.0
 2#define __NO_FORTIFY
 3#include <linux/types.h>
 4#include <linux/module.h>
 5
 6/*
 7 * This file exports some critical string functions and compiler
 8 * built-in functions (where calls are emitted by the compiler
 9 * itself that we cannot avoid even in kernel code) to modules.
10 *
11 * "_user.c" code that previously used exports here such as hostfs
12 * really should be considered part of the 'hypervisor' and define
13 * its own API boundary like hostfs does now; don't add exports to
14 * this file for such cases.
15 */
16
 
 
 
 
 
 
 
 
 
 
17/* If it's not defined, the export is included in lib/string.c.*/
18#ifdef __HAVE_ARCH_STRSTR
19#undef strstr
20EXPORT_SYMBOL(strstr);
21#endif
22
23#ifndef __x86_64__
24#undef memcpy
25extern void *memcpy(void *, const void *, size_t);
26EXPORT_SYMBOL(memcpy);
27extern void *memmove(void *, const void *, size_t);
 
28EXPORT_SYMBOL(memmove);
29#undef memset
30extern void *memset(void *, int, size_t);
31EXPORT_SYMBOL(memset);
32#endif
 
 
 
 
 
 
 
 
 
 
 
 
 
33
34#ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA
35/* needed for __access_ok() */
36EXPORT_SYMBOL(vsyscall_ehdr);
37EXPORT_SYMBOL(vsyscall_end);
38#endif
39
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
40#ifdef _FORTIFY_SOURCE
41extern int __sprintf_chk(char *str, int flag, size_t len, const char *format);
42EXPORT_SYMBOL(__sprintf_chk);
43#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