update access fault type

cfi_backward.adoc

@@ -447,8 +447,8 @@ The `SSPOPCHK` and `C.SSPOPCHK` instructions require the virtual address in
 `ssp` to have a shadow stack attribute (see <<SSMP>>). Correct execution of
 `SSPOPCHK` and `C.SSPOPCHK` requires that `ssp` refers to idempotent memory. If
 the memory reference by `ssp` is not idempotent, then the instructions cause a
-load access-fault exception. If the virtual address in `ssp` is not `XLEN`
-aligned, then `SSPOPCHK` and `C.SSPOPCHK` instructions cause a load
+store/AMO access-fault exception. If the virtual address in `ssp` is not `XLEN`
+aligned, then `SSPOPCHK` and `C.SSPOPCHK` instructions cause a store/AMO
 access-fault exception
 
 [NOTE]
@@ -493,7 +493,7 @@ endif
 If the value loaded from the address in `ssp` does not match the value in `rs1`,
 a software-check exception (cause=18) is raised with `__x__tval` set to "shadow
 stack fault (code=3)". The software-check exception caused by `SSPOPCHK`/
-`C.SSPOPCHK` is lower in priority than a load access-fault exception.
+`C.SSPOPCHK` is lower in priority than a load/store/AMO access-fault exception.
 
 The `ssp` is incremented by `SSPOPCHK` and `C.SSPOPCHK` only if the load from
 the shadow stack completes successfully and no software-check exception is