orphan-handling fixes for v5.10-rc2

- arm: handle .ARM.exidx and .ARM.extab sections (Nathan Chancellor)
 
 - x86: collect .ctors.* with .ctors (Kees Cook)
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Merge tag 'orphan-handling-v5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull orphan section fixes from Kees Cook:
 "A couple corner cases were found from the link-time orphan section
  handling series:

   - arm: handle .ARM.exidx and .ARM.extab sections (Nathan Chancellor)

   - x86: collect .ctors.* with .ctors (Kees Cook)"

* tag 'orphan-handling-v5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  arm/build: Always handle .ARM.exidx and .ARM.extab sections
  vmlinux.lds.h: Keep .ctors.* with .ctors

arch/arm/kernel/vmlinux.lds.S

@@ -40,6 +40,10 @@ SECTIONS
 		ARM_DISCARD
 #ifndef CONFIG_SMP_ON_UP
 		*(.alt.smp.init)
+#endif
+#ifndef CONFIG_ARM_UNWIND
+		*(.ARM.exidx) *(.ARM.exidx.*)
+		*(.ARM.extab) *(.ARM.extab.*)
 #endif
 	}
 

include/asm-generic/vmlinux.lds.h

@@ -701,6 +701,7 @@
 #ifdef CONFIG_CONSTRUCTORS
 #define KERNEL_CTORS()	. = ALIGN(8);			   \
 			__ctors_start = .;		   \
+			KEEP(*(SORT(.ctors.*)))		   \
 			KEEP(*(.ctors))			   \
 			KEEP(*(SORT(.init_array.*)))	   \
 			KEEP(*(.init_array))		   \