mirror of
https://git.proxmox.com/git/fwupd
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0491b07a93
This removes the 100% unused addr_end parameter and explicitly makes the addr_start into the start offset in more cases.
110 lines
2.3 KiB
C
110 lines
2.3 KiB
C
/*
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* Copyright (C) 2021 Richard Hughes <richard@hughsie.com>
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*
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* SPDX-License-Identifier: LGPL-2.1+
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*/
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#include "config.h"
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#include "fu-bytes.h"
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#include "fu-common.h"
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#include "fu-efi-firmware-volume.h"
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#include "fu-ifd-bios.h"
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#include "fu-mem.h"
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/**
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* FuIfdBios:
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*
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* An Intel BIOS section.
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*
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* See also: [class@FuFirmware]
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*/
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G_DEFINE_TYPE(FuIfdBios, fu_ifd_bios, FU_TYPE_IFD_IMAGE)
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#define FU_IFD_BIOS_FIT_SIGNATURE 0x5449465F
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#define FU_IFD_BIOS_FIT_SIZE 0x150000
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static gboolean
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fu_ifd_bios_parse(FuFirmware *firmware,
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GBytes *fw,
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gsize offset,
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FwupdInstallFlags flags,
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GError **error)
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{
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gsize bufsz = 0;
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guint32 sig;
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const guint8 *buf = g_bytes_get_data(fw, &bufsz);
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/* jump 16MiB as required */
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if (bufsz > 0x100000)
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offset += 0x100000;
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/* read each volume in order */
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while (offset < bufsz) {
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g_autoptr(FuFirmware) firmware_tmp = NULL;
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g_autoptr(GBytes) fw_offset = NULL;
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/* ignore _FIT_ as EOF */
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if (!fu_memread_uint32_safe(buf, bufsz, offset, &sig, G_LITTLE_ENDIAN, error)) {
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g_prefix_error(error, "failed to read start signature: ");
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return FALSE;
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}
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if (sig == FU_IFD_BIOS_FIT_SIGNATURE)
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break;
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if (sig == 0xffffffff)
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break;
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/* FV */
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fw_offset = fu_bytes_new_offset(fw, offset, bufsz - offset, error);
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if (fw_offset == NULL)
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return FALSE;
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firmware_tmp = fu_firmware_new_from_gtypes(fw_offset,
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flags,
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error,
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FU_TYPE_EFI_FIRMWARE_VOLUME,
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G_TYPE_INVALID);
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if (firmware_tmp == NULL) {
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g_prefix_error(error,
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"failed to read @0x%x of 0x%x: ",
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(guint)offset,
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(guint)bufsz);
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return FALSE;
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}
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fu_firmware_set_offset(firmware_tmp, offset);
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fu_firmware_add_image(firmware, firmware_tmp);
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/* next! */
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offset += fu_firmware_get_size(firmware_tmp);
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}
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/* success */
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return TRUE;
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}
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static void
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fu_ifd_bios_init(FuIfdBios *self)
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{
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fu_firmware_set_alignment(FU_FIRMWARE(self), FU_FIRMWARE_ALIGNMENT_4K);
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}
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static void
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fu_ifd_bios_class_init(FuIfdBiosClass *klass)
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{
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FuFirmwareClass *klass_firmware = FU_FIRMWARE_CLASS(klass);
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klass_firmware->parse = fu_ifd_bios_parse;
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}
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/**
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* fu_ifd_bios_new:
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*
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* Creates a new #FuFirmware
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*
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* Since: 1.6.2
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**/
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FuFirmware *
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fu_ifd_bios_new(void)
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{
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return FU_FIRMWARE(g_object_new(FU_TYPE_IFD_BIOS, NULL));
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}
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