diff options
| author | Josh Poimboeuf <[email protected]> | 2017-09-18 21:43:36 -0500 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2017-09-28 09:39:03 +0200 |
| commit | abbe1cac6214d81d2f4e149aba64a8760703144e (patch) | |
| tree | f35daf6309fb09a239c57095a6ec76f0a9fa4df0 | |
| parent | 2582d3df95c76d3b686453baf90b64d57e87d1e8 (diff) | |
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 <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Jiri Slaby <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/70ed2eb516fe9266be766d953f93c2571bca88cc.1505764066.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/xen/xen-head.S | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S index 9753225289e8..124941d09b2b 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; \ |