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PR target/109402: v850 (not v850e) variant of __muldi3() moves sp in reversed direction [PR109402]

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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.
This commit is contained in:
Tetsuma Hoshino 2023-04-08 08:19:53 -06:00 • committed by Jeff Law
parent c18b1b0bc7
commit 79fb2de020
1 changed files with 0 additions and 2 deletions
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2
libgcc/config/v850/lib1funcs.S
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@ -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