Clarify Sstvala for breakpoint exceptions (#219)

Author: ved-rivos

src/profiles.adoc

@@ -631,8 +631,8 @@ NOTE: This is a new extension name for this feature.
 
 - *Sstvala* `stval` must be written with the faulting virtual address for load,
   store, and instruction page-fault, access-fault, and misaligned
-  exceptions, and for breakpoint exceptions other than those caused by
-  execution of the `ebreak` or `c.ebreak` instructions.  For
+  exceptions, and for breakpoint exceptions that are defined to write an address to stval,
+  other than those caused by execution of the `EBREAK` or `C.EBREAK` instructions.  For
   virtual-instruction and illegal-instruction exceptions, `stval` must be written with the
   faulting instruction.
 

src/rva23-profile.adoc

@@ -259,8 +259,9 @@ The following privileged extensions were also mandatory in RVA22S64:
 
 - *Sstvala* `stval` must be written with the faulting virtual address
   for load, store, and instruction page-fault, access-fault, and
-  misaligned exceptions, and for breakpoint exceptions other than
-  those caused by execution of the `EBREAK` or `C.EBREAK` instructions.
+  misaligned exceptions, and for breakpoint exceptions that are defined to write
+  an address to stval, other than those caused by execution of the `EBREAK` or
+  `C.EBREAK` instructions.
   For virtual-instruction and illegal-instruction exceptions, `stval` must be written with the
   faulting instruction.
 

src/rvb23-profile.adoc

@@ -272,8 +272,9 @@ in RVB.
 
 - *Sstvala* `stval` must be written with the faulting virtual address
   for load, store, and instruction page-fault, access-fault, and
-  misaligned exceptions, and for breakpoint exceptions other than
-  those caused by execution of the `EBREAK` or `C.EBREAK` instructions.
+  misaligned exceptions, and for breakpoint exceptions that are defined to write
+  an address to stval, other than those caused by execution of the `EBREAK` or
+  `C.EBREAK` instructions.
   For virtual-instruction and illegal-instruction exceptions, `stval` must be written with the
   faulting instruction.