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authorMichael Pratt <mcpratt@pm.me>2021-02-24 22:35:37 -0500
committerPetr Štetiar <ynezz@true.cz>2021-04-08 09:20:59 +0200
commit1b8bd17c2d07c7397015a86941db9e114e1d349a (patch)
tree51d83f09d9ab6994db4a45de8733bd4f8b8222b3 /target
parent11d24ffe961570533a4fc54a7511d30c17290623 (diff)
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ath79: lzma-loader: allow setting custom kernel magic
...and max flash offset The mtdsplit parser was recently refactored to allow the kernel to have custom image header magic. Let's also do this for the lzma-loader For example: When implemented together, this allows the kernel to "appear" to be a rootfs by OEM software in order to write an image that is actually kernel + rootfs. At the same time, it would boot to openwrt normally by setting the same magic in DTS. Both of the variables have a default value that is unchanged when not defined in the makefiles This has no effect on the size of the loader when lzma compressed. Signed-off-by: Michael Pratt <mcpratt@pm.me>
Diffstat (limited to 'target')
-rw-r--r--target/linux/ath79/image/Makefile6
-rw-r--r--target/linux/ath79/image/lzma-loader/Makefile2
-rw-r--r--target/linux/ath79/image/lzma-loader/src/Makefile5
-rw-r--r--target/linux/ath79/image/lzma-loader/src/loader.c4
4 files changed, 16 insertions, 1 deletions
diff --git a/target/linux/ath79/image/Makefile b/target/linux/ath79/image/Makefile
index c2d2474336..d8b8800d91 100644
--- a/target/linux/ath79/image/Makefile
+++ b/target/linux/ath79/image/Makefile
@@ -4,6 +4,7 @@ include $(INCLUDE_DIR)/image.mk
KERNEL_LOADADDR = 0x80060000
DEVICE_VARS += LOADER_FLASH_OFFS LOADER_TYPE
+DEVICE_VARS += LOADER_FLASH_MAX LOADER_KERNEL_MAGIC
DEVICE_VARS += NETGEAR_BOARD_ID NETGEAR_HW_ID
DEVICE_VARS += RAS_BOARD RAS_ROOTFS_SIZE RAS_VERSION
@@ -30,7 +31,10 @@ define Build/loader-kernel
endef
define Build/loader-okli-compile
- $(call Build/loader-common,FLASH_OFFS=$(LOADER_FLASH_OFFS) FLASH_MAX=0)
+ $(call Build/loader-common, \
+ FLASH_OFFS=$(LOADER_FLASH_OFFS) \
+ FLASH_MAX=$(LOADER_FLASH_MAX) \
+ KERNEL_MAGIC=$(LOADER_KERNEL_MAGIC) )
endef
# Arguments: <output name> <kernel offset>
diff --git a/target/linux/ath79/image/lzma-loader/Makefile b/target/linux/ath79/image/lzma-loader/Makefile
index 0ff59bc56a..2b1ed82a98 100644
--- a/target/linux/ath79/image/lzma-loader/Makefile
+++ b/target/linux/ath79/image/lzma-loader/Makefile
@@ -13,6 +13,7 @@ LOADADDR := 0x80060000
LOADER := loader.bin
LOADER_NAME := $(basename $(notdir $(LOADER)))
LOADER_DATA :=
+KERNEL_MAGIC :=
TARGET_DIR :=
FLASH_OFFS :=
FLASH_MAX :=
@@ -41,6 +42,7 @@ loader-compile: $(PKG_BUILD_DIR)/.prepared
LZMA_TEXT_START=$(LZMA_TEXT_START) \
LOADADDR=$(LOADADDR) \
LOADER_DATA=$(LOADER_DATA) \
+ KERNEL_MAGIC=$(KERNEL_MAGIC) \
FLASH_OFFS=$(FLASH_OFFS) \
FLASH_MAX=$(FLASH_MAX) \
BOARD="$(BOARD)" \
diff --git a/target/linux/ath79/image/lzma-loader/src/Makefile b/target/linux/ath79/image/lzma-loader/src/Makefile
index 7773f027a2..c7bb935a03 100644
--- a/target/linux/ath79/image/lzma-loader/src/Makefile
+++ b/target/linux/ath79/image/lzma-loader/src/Makefile
@@ -18,6 +18,7 @@
LOADADDR :=
LZMA_TEXT_START := 0x80a00000
LOADER_DATA :=
+KERNEL_MAGIC :=
BOARD :=
FLASH_OFFS :=
FLASH_MAX :=
@@ -54,6 +55,10 @@ OBJECTS += data.o
CFLAGS += -DLZMA_WRAPPER=1 -DLOADADDR=$(LOADADDR)
endif
+ifneq ($(strip $(KERNEL_MAGIC)),)
+CFLAGS += -DCONFIG_KERNEL_MAGIC=$(KERNEL_MAGIC)
+endif
+
ifneq ($(strip $(KERNEL_CMDLINE)),)
CFLAGS += -DCONFIG_KERNEL_CMDLINE='"$(KERNEL_CMDLINE)"'
endif
diff --git a/target/linux/ath79/image/lzma-loader/src/loader.c b/target/linux/ath79/image/lzma-loader/src/loader.c
index 794c4b6285..0213e94574 100644
--- a/target/linux/ath79/image/lzma-loader/src/loader.c
+++ b/target/linux/ath79/image/lzma-loader/src/loader.c
@@ -189,7 +189,11 @@ static void lzma_init_data(void)
p = flash_base + flash_ofs;
magic = get_be32(p);
+#ifdef CONFIG_KERNEL_MAGIC
+ if (magic == CONFIG_KERNEL_MAGIC) {
+#else
if (magic == IH_MAGIC_OKLI) {
+#endif
hdr = (struct image_header *) p;
break;
}