Commit-ID: e728f61ce05404a26447e6bbc1885ca5956d6a44 Gitweb: http://git.kernel.org/tip/e728f61ce05404a26447e6bbc1885ca5956d6a44 Author: Josh Poimboeuf <[email protected]> AuthorDate: Wed, 21 Sep 2016 16:04:07 -0500 Committer: Ingo Molnar <[email protected]> CommitDate: Thu, 20 Oct 2016 09:15:24 +0200
x86/boot: Move the _stext marker to before the boot code When core_kernel_text() is used to determine whether an address on a task's stack trace is a kernel text address, it incorrectly returns false for early text addresses for the head code between the _text and _stext markers. Among other things, this can cause the unwinder to behave incorrectly when unwinding to x86 head code. Head code is text code too, so mark it as such. This seems to match the intent of other users of the _stext symbol, and it also seems consistent with what other architectures are already doing. Signed-off-by: Josh Poimboeuf <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Nilay Vaish <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/789cf978866420e72fa89df44aa2849426ac378d.1474480779.git.jpoim...@redhat.com Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/kernel/vmlinux.lds.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S index dbf67f6..e79f15f 100644 --- a/arch/x86/kernel/vmlinux.lds.S +++ b/arch/x86/kernel/vmlinux.lds.S @@ -91,10 +91,10 @@ SECTIONS /* Text and read-only data */ .text : AT(ADDR(.text) - LOAD_OFFSET) { _text = .; + _stext = .; /* bootstrapping code */ HEAD_TEXT . = ALIGN(8); - _stext = .; TEXT_TEXT SCHED_TEXT CPUIDLE_TEXT
