cead61a671
GCC hardened introduces additional symbol refererences (for the canary and friends), also in modules - add weak export_symbols for them. We already tested that the weak declaration creates no problem on both GCC's providing the function definition and on GCC's which don't provide it. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
#include "linux/types.h"
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#include "linux/module.h"
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/* Some of this are builtin function (some are not but could in the future),
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* so I *must* declare good prototypes for them and then EXPORT them.
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* The kernel code uses the macro defined by include/linux/string.h,
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* so I undef macros; the userspace code does not include that and I
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* add an EXPORT for the glibc one.*/
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#undef strlen
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#undef strstr
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#undef memcpy
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#undef memset
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extern size_t strlen(const char *);
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extern void *memcpy(void *, const void *, size_t);
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extern void *memmove(void *, const void *, size_t);
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extern void *memset(void *, int, size_t);
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extern int printf(const char *, ...);
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/* If they're not defined, the export is included in lib/string.c.*/
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#ifdef __HAVE_ARCH_STRLEN
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EXPORT_SYMBOL(strlen);
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#endif
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#ifdef __HAVE_ARCH_STRSTR
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EXPORT_SYMBOL(strstr);
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#endif
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EXPORT_SYMBOL(memcpy);
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EXPORT_SYMBOL(memmove);
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EXPORT_SYMBOL(memset);
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EXPORT_SYMBOL(printf);
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/* Here, instead, I can provide a fake prototype. Yes, someone cares: genksyms.
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* However, the modules will use the CRC defined *here*, no matter if it is
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* good; so the versions of these symbols will always match
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*/
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#define EXPORT_SYMBOL_PROTO(sym) \
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int sym(void); \
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EXPORT_SYMBOL(sym);
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extern void readdir64(void) __attribute__((weak));
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EXPORT_SYMBOL(readdir64);
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extern void truncate64(void) __attribute__((weak));
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EXPORT_SYMBOL(truncate64);
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#ifdef SUBARCH_i386
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EXPORT_SYMBOL(vsyscall_ehdr);
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EXPORT_SYMBOL(vsyscall_end);
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#endif
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EXPORT_SYMBOL_PROTO(__errno_location);
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EXPORT_SYMBOL_PROTO(access);
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EXPORT_SYMBOL_PROTO(open);
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EXPORT_SYMBOL_PROTO(open64);
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EXPORT_SYMBOL_PROTO(close);
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EXPORT_SYMBOL_PROTO(read);
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EXPORT_SYMBOL_PROTO(write);
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EXPORT_SYMBOL_PROTO(dup2);
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EXPORT_SYMBOL_PROTO(__xstat);
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EXPORT_SYMBOL_PROTO(__lxstat);
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EXPORT_SYMBOL_PROTO(__lxstat64);
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EXPORT_SYMBOL_PROTO(lseek);
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EXPORT_SYMBOL_PROTO(lseek64);
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EXPORT_SYMBOL_PROTO(chown);
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EXPORT_SYMBOL_PROTO(truncate);
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EXPORT_SYMBOL_PROTO(utime);
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EXPORT_SYMBOL_PROTO(chmod);
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EXPORT_SYMBOL_PROTO(rename);
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EXPORT_SYMBOL_PROTO(__xmknod);
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EXPORT_SYMBOL_PROTO(symlink);
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EXPORT_SYMBOL_PROTO(link);
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EXPORT_SYMBOL_PROTO(unlink);
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EXPORT_SYMBOL_PROTO(readlink);
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EXPORT_SYMBOL_PROTO(mkdir);
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EXPORT_SYMBOL_PROTO(rmdir);
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EXPORT_SYMBOL_PROTO(opendir);
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EXPORT_SYMBOL_PROTO(readdir);
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EXPORT_SYMBOL_PROTO(closedir);
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EXPORT_SYMBOL_PROTO(seekdir);
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EXPORT_SYMBOL_PROTO(telldir);
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EXPORT_SYMBOL_PROTO(ioctl);
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EXPORT_SYMBOL_PROTO(pread64);
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EXPORT_SYMBOL_PROTO(pwrite64);
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EXPORT_SYMBOL_PROTO(statfs);
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EXPORT_SYMBOL_PROTO(statfs64);
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EXPORT_SYMBOL_PROTO(getuid);
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EXPORT_SYMBOL_PROTO(fsync);
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EXPORT_SYMBOL_PROTO(fdatasync);
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/* Export symbols used by GCC for the stack protector. */
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extern void __stack_smash_handler(void *) __attribute__((weak));
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EXPORT_SYMBOL(__stack_smash_handler);
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extern long __guard __attribute__((weak));
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EXPORT_SYMBOL(__guard);
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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