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![Johannes Berg](/assets/img/avatar_default.png)
Make some cleanups, add and fix some comments and document here that we shouldn't export (libc) symbols for "_user.c" code, rather such should work like hostfs does now. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#define __NO_FORTIFY
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#include <linux/types.h>
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#include <linux/module.h>
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/*
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* This file exports some critical string functions and compiler
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* built-in functions (where calls are emitted by the compiler
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* itself that we cannot avoid even in kernel code) to modules.
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*
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* "_user.c" code that previously used exports here such as hostfs
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* really should be considered part of the 'hypervisor' and define
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* its own API boundary like hostfs does now; don't add exports to
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* this file for such cases.
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*/
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/* If it's not defined, the export is included in lib/string.c.*/
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#ifdef __HAVE_ARCH_STRSTR
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#undef strstr
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EXPORT_SYMBOL(strstr);
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#endif
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#ifndef __x86_64__
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#undef memcpy
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extern void *memcpy(void *, const void *, size_t);
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EXPORT_SYMBOL(memcpy);
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extern void *memmove(void *, const void *, size_t);
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EXPORT_SYMBOL(memmove);
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#undef memset
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extern void *memset(void *, int, size_t);
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EXPORT_SYMBOL(memset);
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#endif
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#ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA
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/* needed for __access_ok() */
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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 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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#ifdef _FORTIFY_SOURCE
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extern int __sprintf_chk(char *str, int flag, size_t len, const char *format);
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EXPORT_SYMBOL(__sprintf_chk);
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#endif
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