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

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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
This commit is contained in:
Ard Biesheuvel 2024-12-05 12:28:11 +01:00 committed by Ingo Molnar
parent 35350eb689
commit a6a4ae9c3f
1 changed files with 5 additions and 2 deletions
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7
arch/x86/kernel/vmlinux.lds.S
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@ -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);