From: Ard Biesheuvel Date: Thu, 5 Dec 2024 11:28:10 +0000 (+0100) Subject: x86/kernel: Move ENTRY_TEXT to the start of the image X-Git-Tag: v6.14-rc1~119^2~29 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=35350eb689e68897d996b762832782e2e791eb74;p=thirdparty%2Fkernel%2Fstable.git x86/kernel: Move ENTRY_TEXT to the start of the image Since commit: 7734a0f31e99 ("x86/boot: Robustify calling startup_{32,64}() from the decompressor code") it is no longer necessary for .head.text to appear at the start of the image. Since ENTRY_TEXT needs to appear PMD-aligned, it is easier to just place it at the start of the image, rather than line it up with the end of the .text section. The amount of padding required should be the same, but this arrangement also permits .head.text to be split off and emitted separately, which is needed by a subsequent change. Signed-off-by: Ard Biesheuvel Signed-off-by: Ingo Molnar Cc: Linus Torvalds Cc: "H. Peter Anvin" Link: https://lore.kernel.org/r/20241205112804.3416920-14-ardb+git@google.com --- diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S index fab3ac9a4574a..1ce7889cd12b5 100644 --- a/arch/x86/kernel/vmlinux.lds.S +++ b/arch/x86/kernel/vmlinux.lds.S @@ -121,19 +121,6 @@ SECTIONS .text : AT(ADDR(.text) - LOAD_OFFSET) { _text = .; _stext = .; - /* bootstrapping code */ - HEAD_TEXT - TEXT_TEXT - SCHED_TEXT - LOCK_TEXT - KPROBES_TEXT - SOFTIRQENTRY_TEXT -#ifdef CONFIG_MITIGATION_RETPOLINE - *(.text..__x86.indirect_thunk) - *(.text..__x86.return_thunk) -#endif - STATIC_CALL_TEXT - ALIGN_ENTRY_TEXT_BEGIN *(.text..__x86.rethunk_untrain) ENTRY_TEXT @@ -147,6 +134,19 @@ SECTIONS *(.text..__x86.rethunk_safe) #endif ALIGN_ENTRY_TEXT_END + + /* bootstrapping code */ + HEAD_TEXT + TEXT_TEXT + SCHED_TEXT + LOCK_TEXT + KPROBES_TEXT + SOFTIRQENTRY_TEXT +#ifdef CONFIG_MITIGATION_RETPOLINE + *(.text..__x86.indirect_thunk) + *(.text..__x86.return_thunk) +#endif + STATIC_CALL_TEXT *(.gnu.warning) } :text = 0xcccccccc