Commit a83b02e9 authored Aug 04, 2014 by Max Filippov

xtensa: allow single-stepping through unaligned load/store

Update icount when icountlevel is non-zero but not greater than EXCM level
when load/store instruction is successfully emulated. This allows
single-stepping over such instruction in userspace debugger.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

parent 21570465

arch/xtensa/kernel/align.S

+8 −0

Original line number	Diff line number	Diff line
		@@ -421,6 +421,14 @@ ENTRY(fast_unaligned)

		1: wsr a7, epc1 # skip emulated instruction

		/* Update icount if we're single-stepping in userspace. */
		rsr a4, icountlevel
		beqz a4, 1f
		bgeui a4, LOCKLEVEL + 1, 1f
		rsr a4, icount
		addi a4, a4, 1
		wsr a4, icount
		1:
		movi a4, 0
		rsr a3, excsave1
		s32i a4, a3, EXC_TABLE_FIXUP