[PATCH 1/8] x86/boot: Align vmlinuz sections on page size

Evgeniy Baskov
2022-08-01T16:39:17Z

To protect sections on page table level each section
needs to be aligned on page size (4KB).

Set sections alignment in linker script.

Signed-off-by: Evgeniy Baskov <baskov@ispras.ru>

diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S
index 112b2375d021..6be90f1a1198 100644
--- a/arch/x86/boot/compressed/vmlinux.lds.S
+++ b/arch/x86/boot/compressed/vmlinux.lds.S
@@ -27,21 +27,27 @@ SECTIONS
HEAD_TEXT
_ehead = . ;
}
+ . = ALIGN(PAGE_SIZE);
.rodata..compressed : {
+ _compressed = .;
*(.rodata..compressed)
+ _ecompressed = .;
}
+ . = ALIGN(PAGE_SIZE);
.text : {
_text = .; /* Text */
*(.text)
*(.text.*)
_etext = . ;
}
+ . = ALIGN(PAGE_SIZE);
.rodata : {
_rodata = . ;
*(.rodata) /* read-only data */
*(.rodata.*)
_erodata = . ;
}
+ . = ALIGN(PAGE_SIZE);
.data : {
_data = . ;
*(.data)
--
2.35.1