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-rw-r--r--libc/sysdeps/linux/xtensa/vfork.S10
1 files changed, 6 insertions, 4 deletions
diff --git a/libc/sysdeps/linux/xtensa/vfork.S b/libc/sysdeps/linux/xtensa/vfork.S
index b8db5c1a1..8058fb057 100644
--- a/libc/sysdeps/linux/xtensa/vfork.S
+++ b/libc/sysdeps/linux/xtensa/vfork.S
@@ -59,11 +59,13 @@ HIDDEN_ENTRY (__vfork)
movi a0, .Ljumptable
extui a2, a3, 30, 2 # call-size: call4/8/12 = 1/2/3
addx4 a0, a2, a0 # find return address in jumptable
- slli a2, a2, 30
l32i a0, a0, 0
-
- xor a3, a3, a2 # remove call-size from return address
- or a0, a0, a2 # create temporary return address
+ # exchange top 2 bits of a0 and a3:
+ xor a2, a0, a3
+ extui a2, a2, 30, 2
+ slli a2, a2, 30
+ xor a0, a0, a2
+ xor a3, a3, a2
retw
/* a7: return address */