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--- a/arch/arm/swapcontext.S
+++ b/arch/arm/swapcontext.S
@@ -17,10 +17,12 @@ ALIAS(__swapcontext, libucontext_swapcon
FUNC(libucontext_swapcontext)
/* copy all of the current registers into the ucontext structure */
- add r2, r0, #REG_OFFSET(0)
- stmia r2, {r0-r12}
str r13, [r0,#REG_OFFSET(13)]
str r14, [r0,#REG_OFFSET(15)]
+ add r2, r0, #REG_OFFSET(0)
+ /* copy r0 with value 0 to indicate success (return value 0) */
+ mov r0, #0
+ stmia r2, {r0-r12}
/* load new registers from the second ucontext structure */
add r14, r1, #REG_OFFSET(0)
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