9057f54d74
libefivar expects opening /dev/efi to indicate if the we can make efi runtime calls. With a null routine, it was always succeeding leading efi_variables_supported() to return the wrong value. Only succeed if we have an efi_runtime table. Also, while I'm hear, out of an abundance of caution, add a likely redundant check to make sure efi_systbl is not NULL before dereferencing it. I know it can't be NULL if efi_cfgtbl is non-NULL, but the compiler doesn't.
67 lines
2.6 KiB
C
67 lines
2.6 KiB
C
/*-
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* Copyright (c) 2016 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __AMD64_INCLUDE_EFI_H_
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#define __AMD64_INCLUDE_EFI_H_
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/*
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* XXX: from gcc 6.2 manual:
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* Note, the ms_abi attribute for Microsoft Windows 64-bit targets
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* currently requires the -maccumulate-outgoing-args option.
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*
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* Avoid EFIABI_ATTR declarations for compilers that don't support it.
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* GCC support began in version 4.4.
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*/
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#if defined(__clang__) || defined(__GNUC__) && \
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(__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ >= 4)
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#define EFIABI_ATTR __attribute__((ms_abi))
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#endif
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#ifdef _KERNEL
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struct uuid;
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struct efi_tm;
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int efi_rt_ok(void);
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int efi_get_table(struct uuid *uuid, void **ptr);
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int efi_get_time(struct efi_tm *tm);
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int efi_get_time_locked(struct efi_tm *tm);
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int efi_reset_system(void);
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int efi_set_time(struct efi_tm *tm);
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int efi_set_time_locked(struct efi_tm *tm);
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int efi_var_get(uint16_t *name, struct uuid *vendor, uint32_t *attrib,
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size_t *datasize, void *data);
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int efi_var_nextname(size_t *namesize, uint16_t *name, struct uuid *vendor);
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int efi_var_set(uint16_t *name, struct uuid *vendor, uint32_t attrib,
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size_t datasize, void *data);
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#endif
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#endif /* __AMD64_INCLUDE_EFI_H_ */
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