Commit-ID: abbe1cac6214d81d2f4e149aba64a8760703144e Gitweb: https://git.kernel.org/tip/abbe1cac6214d81d2f4e149aba64a8760703144e Author: Josh Poimboeuf <jpoim...@redhat.com> AuthorDate: Mon, 18 Sep 2017 21:43:36 -0500 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Thu, 28 Sep 2017 09:39:03 +0200
x86/xen: Add unwind hint annotations Add unwind hint annotations to the xen head code so the ORC unwinder can read head_64.o. hypercall_page needs empty annotations at 32-byte intervals to match the 'xen_hypercall_*' ELF functions at those locations. Signed-off-by: Josh Poimboeuf <jpoim...@redhat.com> Cc: Andy Lutomirski <l...@kernel.org> Cc: Boris Ostrovsky <boris.ostrov...@oracle.com> Cc: Jiri Slaby <jsl...@suse.cz> Cc: Juergen Gross <jgr...@suse.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/70ed2eb516fe9266be766d953f93c2571bca88cc.1505764066.git.jpoim...@redhat.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/xen/xen-head.S | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S index 9753225..124941d 100644 --- a/arch/x86/xen/xen-head.S +++ b/arch/x86/xen/xen-head.S @@ -9,6 +9,7 @@ #include <asm/boot.h> #include <asm/asm.h> #include <asm/page_types.h> +#include <asm/unwind_hints.h> #include <xen/interface/elfnote.h> #include <xen/interface/features.h> @@ -19,6 +20,7 @@ #ifdef CONFIG_XEN_PV __INIT ENTRY(startup_xen) + UNWIND_HINT_EMPTY cld /* Clear .bss */ @@ -40,7 +42,10 @@ END(startup_xen) .pushsection .text .balign PAGE_SIZE ENTRY(hypercall_page) - .skip PAGE_SIZE + .rept (PAGE_SIZE / 32) + UNWIND_HINT_EMPTY + .skip 32 + .endr #define HYPERCALL(n) \ .equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \
