Blame SOURCES/runtime-76916-mono-s390x-opcheckthis.patch
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From 7b46eae144e3a6a430155e824fc33e3f38fab427 Mon Sep 17 00:00:00 2001
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From: Ulrich Weigand <ulrich.weigand@de.ibm.com>
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Date: Wed, 12 Oct 2022 09:53:09 +0200
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Subject: [PATCH] [mono][s390x] Fix wrong implementation of OP_CHECK_THIS
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* Only access a single byte in memory for OP_CHECK_THIS
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* Remove unnecessary ltgr instruction
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* Fixes https://github.com/dotnet/runtime/issues/76915
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---
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src/mono/mono/mini/mini-s390x.c | 3 +--
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1 file changed, 1 insertion(+), 2 deletions(-)
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diff --git a/src/runtime/src/mono/mono/mini/mini-s390x.c b/src/runtime/src/mono/mono/mini/mini-s390x.c
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index 7c7a936ed9701..26e6ba1d32a3b 100644
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--- a/src/runtime/src/mono/mono/mini/mini-s390x.c
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+++ b/src/runtime/src/mono/mono/mini/mini-s390x.c
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@@ -3594,8 +3594,7 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
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break;
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case OP_CHECK_THIS: {
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/* ensure ins->sreg1 is not NULL */
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- s390_lg (code, s390_r0, 0, ins->sreg1, 0);
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- s390_ltgr (code, s390_r0, s390_r0);
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+ s390_llgc (code, s390_r0, 0, ins->sreg1, 0);
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}
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break;
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case OP_ARGLIST: {
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