mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
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32f0d3c6c3
Replace all use of memset by zeromem when zeroing moderately-sized structure by applying the following transformation: memset(x, 0, sizeof(x)) => zeromem(x, sizeof(x)) As the Trusted Firmware is compiled with -ffreestanding, it forbids the compiler from using __builtin_memset and forces it to generate calls to the slow memset implementation. Zeromem is a near drop in replacement for this use case, with a more efficient implementation on both AArch32 and AArch64. Change-Id: Ia7f3a90e888b96d056881be09f0b4d65b41aa79e Signed-off-by: Douglas Raillard <douglas.raillard@arm.com>
79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
/*
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* Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
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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 are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <assert.h>
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#include <debug.h>
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#include <errno.h>
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#include <gpt.h>
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#include <string.h>
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#include <utils.h>
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static int unicode_to_ascii(unsigned short *str_in, unsigned char *str_out)
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{
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uint8_t *name = (uint8_t *)str_in;
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int i;
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assert((str_in != NULL) && (str_out != NULL) && (name[0] != '\0'));
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/* check whether the unicode string is valid */
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for (i = 1; i < (EFI_NAMELEN << 1); i += 2) {
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if (name[i] != '\0')
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return -EINVAL;
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}
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/* convert the unicode string to ascii string */
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for (i = 0; i < (EFI_NAMELEN << 1); i += 2) {
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str_out[i >> 1] = name[i];
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if (name[i] == '\0')
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break;
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}
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return 0;
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}
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int parse_gpt_entry(gpt_entry_t *gpt_entry, partition_entry_t *entry)
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{
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int result;
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assert((gpt_entry != 0) && (entry != 0));
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if ((gpt_entry->first_lba == 0) && (gpt_entry->last_lba == 0)) {
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return -EINVAL;
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}
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zeromem(entry, sizeof(partition_entry_t));
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result = unicode_to_ascii(gpt_entry->name, (uint8_t *)entry->name);
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if (result != 0) {
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return result;
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}
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entry->start = (uint64_t)gpt_entry->first_lba * PARTITION_BLOCK_SIZE;
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entry->length = (uint64_t)(gpt_entry->last_lba -
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gpt_entry->first_lba + 1) *
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PARTITION_BLOCK_SIZE;
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return 0;
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}
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