From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Wed, 22 Sep 2021 18:33:40 +0000 (+0100)
Subject: take a copy of SPRs so they are not modified by ISACaller
X-Git-Tag: sv_maxu_works-initial~850
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6bca99fc25f44eea14ac737dcf9f168b06a48107;p=openpower-isa.git

take a copy of SPRs so they are not modified by ISACaller
---

diff --git a/src/openpower/decoder/isa/caller.py b/src/openpower/decoder/isa/caller.py
index 8e7a0e06..f444b14f 100644
--- a/src/openpower/decoder/isa/caller.py
+++ b/src/openpower/decoder/isa/caller.py
@@ -620,6 +620,7 @@ class ISACaller:
         self.msr = SelectableInt(initial_msr, 64)  # underlying reg
         self.pc = PC()
         # GPR FPR SPR registers
+        initial_sprs = copy(initial_sprs) # so as not to get modified
         self.gpr = GPR(decoder2, self, self.svstate, regfile)
         self.fpr = GPR(decoder2, self, self.svstate, fpregfile)
         self.spr = SPR(decoder2, initial_sprs) # initialise SPRs before MMU