root/arch/um/os-Linux/user_syms.c

   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