From: Ard Biesheuvel <ardb@kernel.org>
Date: Thu, 5 Dec 2024 11:28:11 +0000 (+0100)
Subject: x86/boot: Move .head.text into its own output section
X-Git-Tag: v6.14-rc1~119^2~28
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a6a4ae9c3f3a8894c54476cc842069f82af8361c;p=thirdparty%2Flinux.git

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
---

diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 1ce7889cd12b5..56cdf13611e3d 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -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);