MFC r268880:

Allow mappings of memory not previously direct-mapped by the kernel when
calling mmap on /dev/mem and add a handler for the possible userland
machine checks that may result. Remove some pointless and wrong copy/paste
that has been in here for a decade as well.

This results in a /dev/mem with identical semantics to the x86 version.

1 files changed, 9 insertions, 0 deletions

diff --git a/sys/powerpc/aim/trap.c b/sys/powerpc/aim/trap.c
index 73944d1..cd5222a 100644
--- a/sys/powerpc/aim/trap.c
+++ b/sys/powerpc/aim/trap.c
@@ -269,6 +269,15 @@ trap(struct trapframe *frame)
 			}
 			break;
 
+		case EXC_MCHK:
+			/*
+			 * Note that this may not be recoverable for the user
+			 * process, depending on the type of machine check,
+			 * but it at least prevents the kernel from dying.
+			 */
+			sig = SIGBUS;
+			break;
+
 		default:
 			trap_fatal(frame);
 		}