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 <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Link: https://lore.kernel.org/r/[email protected]
torvalds · Dec 5, 2024 · a6a4ae9 · a6a4ae9
1 parent 35350eb
commit a6a4ae9
Showing 1 changed file with 5 additions and 2 deletions.
diff --git 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);