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authorRussell King <rmk+kernel@armlinux.org.uk>2017-10-23 12:39:32 +0100
committerRussell King <rmk+kernel@armlinux.org.uk>2017-12-17 22:14:05 +0000
commit55e7cff44c7c322310aded74ed92c54b22ccccd4 (patch)
treeed25c04f6de4941be1f315319986dfe76382f177 /arch/arm/boot/compressed
parent4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323 (diff)
ARM: verify size of zImage
The linker can sometimes add additional sections to the zImage ELF file which results in the zImage binary being larger than expected. This causes appended DT blobs to fail. Verify that the zImage binary is the expected size, and fail the build if this is not the case. We need to include the .data.rel.ro section in the image as the RiscPC build includes font data that contains a small amount of data in this section. Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/boot/compressed')
-rw-r--r--arch/arm/boot/compressed/vmlinux.lds.S8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/vmlinux.lds.S b/arch/arm/boot/compressed/vmlinux.lds.S
index e6bf6774c4bb..2b963d8e76dd 100644
--- a/arch/arm/boot/compressed/vmlinux.lds.S
+++ b/arch/arm/boot/compressed/vmlinux.lds.S
@@ -56,6 +56,7 @@ SECTIONS
.rodata : {
*(.rodata)
*(.rodata.*)
+ *(.data.rel.ro)
}
.piggydata : {
*(.piggydata)
@@ -101,6 +102,12 @@ SECTIONS
* this symbol allows further debug in the near future.
*/
.image_end (NOLOAD) : {
+ /*
+ * EFI requires that the image is aligned to 512 bytes, and appended
+ * DTB requires that we know where the end of the image is. Ensure
+ * that both are satisfied by ensuring that there are no additional
+ * sections emitted into the decompressor image.
+ */
_edata_real = .;
}
@@ -128,3 +135,4 @@ SECTIONS
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
}
+ASSERT(_edata_real == _edata, "error: zImage file size is incorrect");