mirror of
https://git.proxmox.com/git/fwupd
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7afd7cba0d
In many plugins we've wanted to use ->prepare_firmware() to parse the firmware ahead of ->detach() and ->write_firmware() but this has the limitation that it can only return a single blob of data. For many devices, multiple binary blobs are required from one parsed image, for instance providing signatures, config and data blobs that have to be pushed to the device in different way. This also means we parse the firmware *before* we ask the user to detach. Break the internal FuDevice API to support these firmware types as they become more popular. This also allows us to move the Intel HEX and SREC parsing out of the dfu plugin as they are used by a few plugins now, and resolving symbols between plugins isn't exactly awesome.
125 lines
2.9 KiB
C
125 lines
2.9 KiB
C
/*
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* Copyright (C) 2017-2019 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 <gelf.h>
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#include <libelf.h>
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#include "fu-altos-firmware.h"
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struct _FuAltosFirmware {
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FuFirmware parent_instance;
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};
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G_DEFINE_TYPE (FuAltosFirmware, fu_altos_firmware, FU_TYPE_FIRMWARE)
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wunused-function"
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(Elf, elf_end);
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#pragma clang diagnostic pop
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static gboolean
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fu_altos_firmware_parse (FuFirmware *firmware,
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GBytes *blob,
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guint64 addr_start,
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guint64 addr_end,
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FwupdInstallFlags flags,
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GError **error)
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{
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const gchar *name;
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Elf_Scn *scn = NULL;
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GElf_Shdr shdr;
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size_t shstrndx;
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g_autoptr(Elf) e = NULL;
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/* load library */
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if (elf_version (EV_CURRENT) == EV_NONE) {
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g_set_error (error,
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FWUPD_ERROR,
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FWUPD_ERROR_INTERNAL,
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"ELF library init failed: %s",
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elf_errmsg (-1));
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return FALSE;
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}
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/* parse data */
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e = elf_memory ((gchar *) g_bytes_get_data (blob, NULL),
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g_bytes_get_size (blob));
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if (e == NULL) {
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g_set_error (error,
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FWUPD_ERROR,
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FWUPD_ERROR_INTERNAL,
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"failed to load data as ELF: %s",
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elf_errmsg (-1));
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return FALSE;
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}
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if (elf_kind (e) != ELF_K_ELF) {
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g_set_error (error,
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FWUPD_ERROR,
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FWUPD_ERROR_INTERNAL,
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"not a supported ELF format: %s",
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elf_errmsg (-1));
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return FALSE;
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}
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/* add interesting section */
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if (elf_getshdrstrndx (e, &shstrndx) != 0) {
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g_set_error (error,
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FWUPD_ERROR,
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FWUPD_ERROR_INTERNAL,
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"invalid ELF file: %s",
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elf_errmsg (-1));
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return FALSE;
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}
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while ((scn = elf_nextscn (e, scn)) != NULL ) {
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if (gelf_getshdr (scn, &shdr) != & shdr)
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continue;
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/* not program data with the same section name */
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if (shdr.sh_type != SHT_PROGBITS)
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continue;
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if ((name = elf_strptr (e, shstrndx, shdr.sh_name)) == NULL)
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continue;
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if (g_strcmp0 (name, ".text") == 0) {
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Elf_Data *data = elf_getdata (scn, NULL);
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if (data != NULL && data->d_buf != NULL) {
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g_autoptr(FuFirmwareImage) img = NULL;
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g_autoptr(GBytes) bytes = NULL;
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bytes = g_bytes_new (data->d_buf, data->d_size);
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img = fu_firmware_image_new (bytes);
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fu_firmware_image_set_addr (img, shdr.sh_addr);
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fu_firmware_add_image (firmware, img);
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}
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return TRUE;
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}
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}
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g_set_error_literal (error,
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FWUPD_ERROR,
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FWUPD_ERROR_INTERNAL,
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"no firmware found in ELF file");
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return FALSE;
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}
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static void
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fu_altos_firmware_class_init (FuAltosFirmwareClass *klass)
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{
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FuFirmwareClass *klass_firmware = FU_FIRMWARE_CLASS (klass);
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klass_firmware->parse = fu_altos_firmware_parse;
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}
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static void
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fu_altos_firmware_init (FuAltosFirmware *self)
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{
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}
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FuFirmware *
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fu_altos_firmware_new (void)
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{
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return FU_FIRMWARE (g_object_new (FU_TYPE_ALTOS_FIRMWARE, NULL));
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}
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