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x86,xen,objtool: Add UNWIND hint 

SYM_CODE_START*() doesn't get auto-validated and needs an UNWIND hint
to get checked, add one.

  vmlinux.o: warning: objtool: pvh_start_xen()+0x0: unreachable

Reported-by: Thomas Gleixner <tglx@linutronix.de>
Reported-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220408094718.321246297@infradead.org
This commit is contained in:
Peter Zijlstra 2022-04-08 11:45:54 +02:00
parent 226d44acf6
commit 2730d3c14a
1 changed files with 1 additions and 0 deletions
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1
arch/x86/platform/pvh/head.S
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@ -50,6 +50,7 @@
#define PVH_DS_SEL (PVH_GDT_ENTRY_DS * 8)
SYM_CODE_START_LOCAL(pvh_start_xen)
UNWIND_HINT_EMPTY
cld
lgdt (_pa(gdt))