fastboot: add support for v3 boot header format
Support v3 header format when changing the command line with
fastboot boot or using flash:raw.
Bug: 151750405
Test: fastboot boot and flash:raw with updated cmdline and v3 header
Change-Id: Ibf396e2d18d8b22cad50db290f3fd4e46ff85d9b
diff --git a/fastboot/bootimg_utils.cpp b/fastboot/bootimg_utils.cpp
index 46d4bd3..2c0989e 100644
--- a/fastboot/bootimg_utils.cpp
+++ b/fastboot/bootimg_utils.cpp
@@ -34,14 +34,54 @@
#include <stdlib.h>
#include <string.h>
-void bootimg_set_cmdline(boot_img_hdr_v2* h, const std::string& cmdline) {
+static void bootimg_set_cmdline_v3(boot_img_hdr_v3* h, const std::string& cmdline) {
if (cmdline.size() >= sizeof(h->cmdline)) die("command line too large: %zu", cmdline.size());
strcpy(reinterpret_cast<char*>(h->cmdline), cmdline.c_str());
}
+void bootimg_set_cmdline(boot_img_hdr_v2* h, const std::string& cmdline) {
+ if (h->header_version == 3) {
+ return bootimg_set_cmdline_v3(reinterpret_cast<boot_img_hdr_v3*>(h), cmdline);
+ }
+ if (cmdline.size() >= sizeof(h->cmdline)) die("command line too large: %zu", cmdline.size());
+ strcpy(reinterpret_cast<char*>(h->cmdline), cmdline.c_str());
+}
+
+static boot_img_hdr_v3* mkbootimg_v3(const std::vector<char>& kernel,
+ const std::vector<char>& ramdisk, const boot_img_hdr_v2& src,
+ std::vector<char>* out) {
+#define V3_PAGE_SIZE 4096
+ const size_t page_mask = V3_PAGE_SIZE - 1;
+ int64_t kernel_actual = (kernel.size() + page_mask) & (~page_mask);
+ int64_t ramdisk_actual = (ramdisk.size() + page_mask) & (~page_mask);
+
+ int64_t bootimg_size = V3_PAGE_SIZE + kernel_actual + ramdisk_actual;
+ out->resize(bootimg_size);
+
+ boot_img_hdr_v3* hdr = reinterpret_cast<boot_img_hdr_v3*>(out->data());
+
+ memcpy(hdr->magic, BOOT_MAGIC, BOOT_MAGIC_SIZE);
+ hdr->kernel_size = kernel.size();
+ hdr->ramdisk_size = ramdisk.size();
+ hdr->os_version = src.os_version;
+ hdr->header_size = sizeof(boot_img_hdr_v3);
+ hdr->header_version = 3;
+
+ memcpy(hdr->magic + V3_PAGE_SIZE, kernel.data(), kernel.size());
+ memcpy(hdr->magic + V3_PAGE_SIZE + kernel_actual, ramdisk.data(), ramdisk.size());
+
+ return hdr;
+}
+
boot_img_hdr_v2* mkbootimg(const std::vector<char>& kernel, const std::vector<char>& ramdisk,
const std::vector<char>& second, const std::vector<char>& dtb,
size_t base, const boot_img_hdr_v2& src, std::vector<char>* out) {
+ if (src.header_version == 3) {
+ if (!second.empty() || !dtb.empty()) {
+ die("Second stage bootloader and dtb not supported in v3 boot image\n");
+ }
+ return reinterpret_cast<boot_img_hdr_v2*>(mkbootimg_v3(kernel, ramdisk, src, out));
+ }
const size_t page_mask = src.page_size - 1;
int64_t header_actual = (sizeof(boot_img_hdr_v1) + page_mask) & (~page_mask);