From: Jacob Lifshay <programmerjake@gmail.com>
Date: Wed, 6 Dec 2023 09:08:25 +0000 (-0800)
Subject: MemMMap: raise error for bad load/fetch addresses when emulating mmap
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1d9ff169dee8c27c18e832f11ace7931b5e42754;p=openpower-isa.git

MemMMap: raise error for bad load/fetch addresses when emulating mmap
---

diff --git a/src/openpower/decoder/isa/mem.py b/src/openpower/decoder/isa/mem.py
index 4947e9b1..2b8c5279 100644
--- a/src/openpower/decoder/isa/mem.py
+++ b/src/openpower/decoder/isa/mem.py
@@ -991,6 +991,12 @@ class MemMMap(MemCommon):
     def __access_addr_range_err(self, start_addr, size, needed_flag):
         assert needed_flag != MMapPageFlags.W, \
             "can't write to address 0x%X size 0x%X" % (start_addr, size)
+        if self.emulating_mmap:
+            exc = MemException("access not allowed",
+                               "memory access not allowed: addr=0x%X: %s"
+                               % (start_addr, needed_flag))
+            exc.dar = start_addr
+            raise exc
         return None, 0
 
     def __access_addr_range(self, start_addr, size, needed_flag):