Commit a6a4ae9c authored Dec 05, 2024 by Ard Biesheuvel Committed by Ingo Molnar Dec 05, 2024

x86/boot: Move .head.text into its own output section



In order to be able to double check that vmlinux is emitted without
absolute symbol references in .head.text, it needs to be distinguishable
from the rest of .text in the ELF metadata.

So move .head.text into its own ELF section.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lore.kernel.org/r/20241205112804.3416920-15-ardb+git@google.com

parent 35350eb6

arch/x86/kernel/vmlinux.lds.S

+5 −2

Original line number	Diff line number	Diff line
		@@ -135,8 +135,6 @@ SECTIONS
		#endif
		ALIGN_ENTRY_TEXT_END

		/* bootstrapping code */
		HEAD_TEXT
		TEXT_TEXT
		SCHED_TEXT
		LOCK_TEXT
		@@ -151,6 +149,11 @@ SECTIONS

		} :text = 0xcccccccc

		/* bootstrapping code */
		.head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {
		HEAD_TEXT
		} :text = 0xcccccccc

		/* End of text section, which should occupy whole number of pages */
		_etext = .;
		. = ALIGN(PAGE_SIZE);