[XTENSA] Add missing a2 register restore in register spill routine
Register a2 is saved in depc but wasn't getting restored before
returning from _spill_registers when there weren't any registers
to spill. The mask to cut the top bit from the rotated WINDOWMASK
register was also one bit short.
Signed-off-by: CHris Zankel <chris@zankel.net>
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index 91a689e..401b33b 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -1344,7 +1344,7 @@
/* We are done if there are no more than the current register frame. */
- extui a3, a3, 1, WSBITS-2 # a3 = 0yyxxxwww
+ extui a3, a3, 1, WSBITS-1 # a3 = 0yyxxxwww
movi a2, (1 << (WSBITS-1))
_beqz a3, .Lnospill # only one active frame? jump
@@ -1394,6 +1394,10 @@
l32e a4, a1, -16
j .Lc12c
+.Lnospill:
+ rsr a2, DEPC # restore a2 and 'return'
+ jx a0
+
.Lloop: _bbsi.l a3, 1, .Lc4
_bbci.l a3, 2, .Lc12
@@ -1419,8 +1423,6 @@
movi a3, 1
sll a3, a3
wsr a3, WINDOWSTART
-
-.Lnospill:
jx a0
.Lc4: s32e a4, a9, -16