PR target/109402: v850 (not v850e) variant of __muldi3() moves sp in reversed directi...

muldi3 will deallocate stack space after the call to __save_r26_r31,
then re-allocate the space a short while later.  If an interrupt
occurs in that window, it can clobber items on the stack.

	PR target/109402

libgcc/
	* config/v850/lib1funcs.S (___muldi3): Remove unnecessary
	stack manipulations.

diff --git a/libgcc/config/v850/lib1funcs.S b/libgcc/config/v850/lib1funcs.S
index 20fa499..35b5ab5 100644 (file)
--- a/libgcc/config/v850/lib1funcs.S
+++ b/libgcc/config/v850/lib1funcs.S
@@ -2211,7 +2211,6 @@ ___ucmpdi2:
 ___muldi3:
 #ifdef __v850__
         jarl  __save_r26_r31, r10
-        addi  16,  sp, sp
         mov   r6,  r28
         shr   15,  r28
         movea lo(32767), r0, r14
@@ -2256,7 +2255,6 @@ ___muldi3:
         mulh  r12, r6
         mov   r28,  r17
         mulh  r10, r17
-        add   -16, sp
         mov   r28,  r12
         mulh  r8,  r12
         add   r17, r18