diff mbox series

[v2,01/23] x86/boot: Align vmlinuz sections on page size

Message ID f71669e1847b03f1aa51305128fa1fa26bba1f91.1666705333.git.baskov@ispras.ru
State Superseded
Headers show
Series x86_64: Improvements at compressed kernel stage | expand

Commit Message

Evgeniy Baskov Oct. 25, 2022, 2:12 p.m. UTC 
To protect sections on page table level each section
needs to be aligned on page size (4KB).

Set sections alignment in linker script.

Add _compressed/_ecompressed symbols to access '.rodata..compressed'
section content in the same way other sections are accessed.
This is useful when applying memory attributes of the section.

Signed-off-by: Evgeniy Baskov <baskov@ispras.ru>
---
 arch/x86/boot/compressed/vmlinux.lds.S | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

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)