diff --git a/CMakeLists.txt b/CMakeLists.txt
index e59dcd36..24ec09f6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,30 +1,32 @@
+######################################################################
+#
+# CMAKE build recipe for CFE Platform Support Package (PSP)
+#
+######################################################################
+
 project(CFEPSP C)
 
 if (NOT CFE_SYSTEM_PSPNAME)
   message(FATAL_ERROR "CFE_SYSTEM_PSPNAME is not defined - do not know which to build")
 endif()
 
+set(CFE_PSP_TARGETNAME "${CFE_SYSTEM_PSPNAME}")
 add_definitions(-D_CFE_PSP_)
 
-include_directories(fsw/shared)
-
-# Build the PSP implementation which lies in a system-specific subdirectory
-include_directories(fsw/shared)
-include_directories(fsw/${CFE_SYSTEM_PSPNAME}/inc)
-add_subdirectory(fsw/${CFE_SYSTEM_PSPNAME} ${CFE_SYSTEM_PSPNAME})
-
-# Build the "common" parts as a library
-add_library(psp-${CFE_SYSTEM_PSPNAME} STATIC
-    fsw/shared/cfe_psp_configdata.c
-    fsw/shared/cfe_psp_eeprom.c
-    fsw/shared/cfe_psp_exceptionstorage.c
-    fsw/shared/cfe_psp_memrange.c
-    fsw/shared/cfe_psp_memutils.c
-    fsw/shared/cfe_psp_module.c
-    fsw/shared/cfe_psp_port.c
-    fsw/shared/cfe_psp_ram.c
-    $<TARGET_OBJECTS:psp-${CFE_SYSTEM_PSPNAME}-impl>)
+# The PSP is currently built in two parts, consisting of a fully platform-specific
+# module combined with a shared component which is built for multiple targets.
+# The "shared" component is compiled using headers from the platform-specific module
+# so it is still ultimately a platform-specific binary, and it all gets wrapped into
+# a single PSP static library target.
+include_directories(fsw/shared/inc)
+add_subdirectory(fsw/${CFE_PSP_TARGETNAME} ${CFE_PSP_TARGETNAME}-impl)
+add_subdirectory(fsw/shared ${CFE_PSP_TARGETNAME}-shared)
 
+add_library(psp-${CFE_PSP_TARGETNAME} STATIC
+    $<TARGET_OBJECTS:psp-${CFE_PSP_TARGETNAME}-shared>
+    $<TARGET_OBJECTS:psp-${CFE_PSP_TARGETNAME}-impl>
+)
+    
 if (ENABLE_UNIT_TESTS)
     add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/fsw/ut-stubs)
 endif (ENABLE_UNIT_TESTS)
diff --git a/fsw/mcp750-vxworks/CMakeLists.txt b/fsw/mcp750-vxworks/CMakeLists.txt
index 91bf5d78..e57cdb0e 100644
--- a/fsw/mcp750-vxworks/CMakeLists.txt
+++ b/fsw/mcp750-vxworks/CMakeLists.txt
@@ -1,6 +1,16 @@
+######################################################################
+#
+# CMAKE build recipe for mcp750-vxworks PSP component
+#
+######################################################################
+
+# This contains the fully platform-specific code to 
+# run CFE on this target.
+
+include_directories(inc) 
 
 # Build the mcp750-vxworks implementation as a library
-add_library(psp-${CFE_SYSTEM_PSPNAME}-impl OBJECT
+add_library(psp-${CFE_PSP_TARGETNAME}-impl OBJECT
     src/cfe_psp_exception.c
     src/cfe_psp_memory.c
     src/cfe_psp_memtab.c
diff --git a/fsw/mcp750-vxworks/src/cfe_psp_exception.c b/fsw/mcp750-vxworks/src/cfe_psp_exception.c
index 7fbee892..aaf94800 100644
--- a/fsw/mcp750-vxworks/src/cfe_psp_exception.c
+++ b/fsw/mcp750-vxworks/src/cfe_psp_exception.c
@@ -54,7 +54,8 @@
 
 #include "cfe_psp.h"
 #include "cfe_psp_config.h"
-#include "cfe_psp_exceptionstorage.h"
+#include "cfe_psp_exceptionstorage_types.h"
+#include "cfe_psp_exceptionstorage_api.h"
 #include "cfe_psp_memory.h"
 
 #include <target_config.h>
@@ -88,7 +89,7 @@ void CFE_PSP_ExceptionHook ( TASK_ID task_id, int vector, void* vpEsf );
 void CFE_PSP_AttachExceptions(void)
 {
     excHookAdd( CFE_PSP_ExceptionHook );
-    OS_printf("CFE_PSP: Attached cFE Exception Handler. Context Size = %u bytes.\n",sizeof(CFE_PSP_Exception_ContextDataEntry_t));
+    OS_printf("CFE_PSP: Attached cFE Exception Handler. Context Size = %lu bytes.\n",(unsigned long)sizeof(CFE_PSP_Exception_ContextDataEntry_t));
     CFE_PSP_Exception_Reset();
 }
 
diff --git a/fsw/mcp750-vxworks/src/cfe_psp_start.c b/fsw/mcp750-vxworks/src/cfe_psp_start.c
index 720c46c7..e1f337b3 100644
--- a/fsw/mcp750-vxworks/src/cfe_psp_start.c
+++ b/fsw/mcp750-vxworks/src/cfe_psp_start.c
@@ -111,6 +111,13 @@ void OS_Application_Startup(void)
        /* note: use printf here, as OS_printf may not work */
        printf("CFE_PSP: OS_API_Init() failure\n");
        CFE_PSP_Panic(Status);
+
+       /*
+        * normally CFE_PSP_Panic() does not return, except
+        * during unit testing.  This return avoids executing
+        * the rest of this function in that case.
+        */
+       return;
    }
 
    /*
diff --git a/fsw/mcp750-vxworks/src/cfe_psp_watchdog.c b/fsw/mcp750-vxworks/src/cfe_psp_watchdog.c
index fabd576c..5081bea3 100644
--- a/fsw/mcp750-vxworks/src/cfe_psp_watchdog.c
+++ b/fsw/mcp750-vxworks/src/cfe_psp_watchdog.c
@@ -66,8 +66,6 @@
 #include "cfe_psp.h"
 #include "cfe_psp_config.h"
 
-IMPORT void   sysPciRead32 (UINT32, UINT32 *);
-
 /*
 ** Global data
 */
diff --git a/fsw/pc-linux/CMakeLists.txt b/fsw/pc-linux/CMakeLists.txt
index bb10d4f0..c89361a7 100644
--- a/fsw/pc-linux/CMakeLists.txt
+++ b/fsw/pc-linux/CMakeLists.txt
@@ -1,6 +1,16 @@
+######################################################################
+#
+# CMAKE build recipe for pc-linux PSP component
+#
+######################################################################
+
+# This contains the fully platform-specific code to 
+# run CFE on this target.
+
+include_directories(inc) 
 
 # Build the pc-linux implementation as a library
-add_library(psp-${CFE_SYSTEM_PSPNAME}-impl OBJECT
+add_library(psp-${CFE_PSP_TARGETNAME}-impl OBJECT
     src/cfe_psp_exception.c
     src/cfe_psp_memory.c
     src/cfe_psp_memtab.c
diff --git a/fsw/pc-linux/src/cfe_psp_exception.c b/fsw/pc-linux/src/cfe_psp_exception.c
index bf16fb5e..fc57b0c9 100644
--- a/fsw/pc-linux/src/cfe_psp_exception.c
+++ b/fsw/pc-linux/src/cfe_psp_exception.c
@@ -46,7 +46,8 @@ S
 #include "osapi.h"
 #include "cfe_psp.h"
 #include "cfe_psp_config.h"
-#include "cfe_psp_exceptionstorage.h"
+#include "cfe_psp_exceptionstorage_types.h"
+#include "cfe_psp_exceptionstorage_api.h"
 
 #include <execinfo.h>
 #include <signal.h>
diff --git a/fsw/pc-rtems/CMakeLists.txt b/fsw/pc-rtems/CMakeLists.txt
index 5abbc21a..1014f67b 100644
--- a/fsw/pc-rtems/CMakeLists.txt
+++ b/fsw/pc-rtems/CMakeLists.txt
@@ -1,6 +1,16 @@
+######################################################################
+#
+# CMAKE build recipe for pc-rtems PSP component
+#
+######################################################################
+
+# This contains the fully platform-specific code to 
+# run CFE on this target.
+
+include_directories(inc) 
 
 # Build the pc-rtems implementation as a library
-add_library(psp-${CFE_SYSTEM_PSPNAME}-impl OBJECT
+add_library(psp-${CFE_PSP_TARGETNAME}-impl OBJECT
     src/cfe_psp_exception.c
     src/cfe_psp_memory.c
     src/cfe_psp_memtab.c
diff --git a/fsw/pc-rtems/src/cfe_psp_exception.c b/fsw/pc-rtems/src/cfe_psp_exception.c
index 0178555f..04f58fc1 100644
--- a/fsw/pc-rtems/src/cfe_psp_exception.c
+++ b/fsw/pc-rtems/src/cfe_psp_exception.c
@@ -47,7 +47,8 @@
 #include "cfe_psp.h" 
 #include "cfe_psp_config.h"
 #include "cfe_psp_memory.h"
-#include "cfe_psp_exceptionstorage.h"
+#include "cfe_psp_exceptionstorage_types.h"
+#include "cfe_psp_exceptionstorage_api.h"
 
 /*
 **
diff --git a/fsw/shared/CMakeLists.txt b/fsw/shared/CMakeLists.txt
new file mode 100644
index 00000000..08b28bcc
--- /dev/null
+++ b/fsw/shared/CMakeLists.txt
@@ -0,0 +1,26 @@
+######################################################################
+#
+# CMAKE build recipe for shared PSP component
+#
+######################################################################
+
+# This contains supplemental code to support running CFE
+# on a variety of targets.
+#
+# Note this shared PSP code is currently built against headers provided by the
+# target implementation.  This makes it implementation-specific even though
+# the same source code is used with multiple targets.
+include_directories("${CFEPSP_SOURCE_DIR}/fsw/${CFE_PSP_TARGETNAME}/inc")
+include_directories(inc)
+
+# Build the shared implementation as a library
+add_library(psp-${CFE_PSP_TARGETNAME}-shared OBJECT
+    src/cfe_psp_configdata.c
+    src/cfe_psp_eeprom.c
+    src/cfe_psp_exceptionstorage.c
+    src/cfe_psp_memrange.c
+    src/cfe_psp_memutils.c
+    src/cfe_psp_module.c
+    src/cfe_psp_port.c
+    src/cfe_psp_ram.c
+)
diff --git a/fsw/shared/cfe_psp_exceptionstorage.h b/fsw/shared/inc/cfe_psp_exceptionstorage_api.h
similarity index 67%
rename from fsw/shared/cfe_psp_exceptionstorage.h
rename to fsw/shared/inc/cfe_psp_exceptionstorage_api.h
index 4b837fb7..45bf5137 100644
--- a/fsw/shared/cfe_psp_exceptionstorage.h
+++ b/fsw/shared/inc/cfe_psp_exceptionstorage_api.h
@@ -19,40 +19,21 @@
 */
 
 /**
- * \file cfe_psp_exceptionstorage.h
+ * \file cfe_psp_exceptionstorage_api.h
  *
  * Provides a generic storage buffer ring for exceptions
  */
 
-#ifndef CFE_PSP_EXCEPTIONSTORAGE_H_
-#define CFE_PSP_EXCEPTIONSTORAGE_H_
+#ifndef CFE_PSP_EXCEPTIONSTORAGE_API_H_
+#define CFE_PSP_EXCEPTIONSTORAGE_API_H_
 
 #include <cfe_psp.h>
-#include <cfe_psp_config.h>
 
 /*
- * The "MetaData" stores ephemeral exception information
- * which only has meaning within the currently-running process.
- *
- * This data is important for diagnosing the exception, but it
- * is NOT saved to any persistent log because it will not be
- * relevant once the process ends.
+ * Abstract types for exception storage.
+ * These are made concrete depending on PSP-specific config information.
  */
-typedef struct
-{
-    uint32 context_id;                          /**< a unique ID assigned to this exception entry */
-    uint32 context_size;                        /**< actual size of the "context_info" data */
-    CFE_PSP_Exception_SysTaskId_t sys_task_id;  /**< the BSP-specific task info (not osal abstracted id) */
-    CFE_PSP_Exception_ContextDataEntry_t context_info;
-} CFE_PSP_Exception_LogData_t;
-
-
-typedef struct
-{
-    volatile uint32 NumWritten;
-    volatile uint32 NumRead;
-    CFE_PSP_Exception_LogData_t Entries[CFE_PSP_MAX_EXCEPTION_ENTRIES];
-} CFE_PSP_ExceptionStorage_t;
+struct CFE_PSP_Exception_LogData;
 
 
 
@@ -60,6 +41,18 @@ typedef struct
  * Functions implemented in shared layer, invoked by impl layer.
  * ------------------------------------------------------------- */
 
+/**
+ * \brief Get the next buffer for exception buffer corresponding to sequence
+ *
+ * This function obtains a storage buffer corresponding to the given sequence number.
+ * The pointer to storage memory is directly returned. It is not cleared or modified,
+ * and no checks are performed to determine if the sequence number is valid.
+ *
+ * \param   seq     Sequence number
+ * \returns pointer to buffer.
+ */
+extern struct CFE_PSP_Exception_LogData* CFE_PSP_Exception_GetBuffer(uint32 seq);
+
 /**
  * \brief Get the next buffer for exception context storage
  *
@@ -69,7 +62,7 @@ typedef struct
  *
  * \returns pointer to buffer, or NULL if storage is full.
  */
-extern CFE_PSP_Exception_LogData_t* CFE_PSP_Exception_GetNextContextBuffer(void);
+extern struct CFE_PSP_Exception_LogData* CFE_PSP_Exception_GetNextContextBuffer(void);
 
 /**
  * \brief Finish storage of exception data
@@ -102,6 +95,6 @@ extern void CFE_PSP_Exception_Reset(void);
  *
  * \returns CFE_PSP_SUCCESS on success
  */
-extern int32 CFE_PSP_ExceptionGetSummary_Impl(const CFE_PSP_Exception_LogData_t* Buffer, char *ReasonBuf, uint32 ReasonSize);
+extern int32 CFE_PSP_ExceptionGetSummary_Impl(const struct CFE_PSP_Exception_LogData* Buffer, char *ReasonBuf, uint32 ReasonSize);
 
-#endif /* CFE_PSP_EXCEPTIONSTORAGE_H_ */
+#endif /* CFE_PSP_EXCEPTIONSTORAGE_API_H_ */
diff --git a/fsw/shared/inc/cfe_psp_exceptionstorage_types.h b/fsw/shared/inc/cfe_psp_exceptionstorage_types.h
new file mode 100644
index 00000000..dad4c788
--- /dev/null
+++ b/fsw/shared/inc/cfe_psp_exceptionstorage_types.h
@@ -0,0 +1,61 @@
+/*
+**  GSC-18128-1, "Core Flight Executive Version 6.7"
+**
+**  Copyright (c) 2006-2019 United States Government as represented by
+**  the Administrator of the National Aeronautics and Space Administration.
+**  All Rights Reserved.
+**
+**  Licensed under the Apache License, Version 2.0 (the "License");
+**  you may not use this file except in compliance with the License.
+**  You may obtain a copy of the License at
+**
+**    http://www.apache.org/licenses/LICENSE-2.0
+**
+**  Unless required by applicable law or agreed to in writing, software
+**  distributed under the License is distributed on an "AS IS" BASIS,
+**  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+**  See the License for the specific language governing permissions and
+**  limitations under the License.
+*/
+
+/**
+ * \file cfe_psp_exceptionstorage_types.h
+ *
+ * Provides a generic storage buffer ring for exceptions
+ */
+
+#ifndef CFE_PSP_EXCEPTIONSTORAGE_TYPES_H_
+#define CFE_PSP_EXCEPTIONSTORAGE_TYPES_H_
+
+#include <cfe_psp.h>
+#include <cfe_psp_config.h>
+
+/*
+ * The "MetaData" stores ephemeral exception information
+ * which only has meaning within the currently-running process.
+ *
+ * This data is important for diagnosing the exception, but it
+ * is NOT saved to any persistent log because it will not be
+ * relevant once the process ends.
+ */
+struct CFE_PSP_Exception_LogData
+{
+    uint32 context_id;                          /**< a unique ID assigned to this exception entry */
+    uint32 context_size;                        /**< actual size of the "context_info" data */
+    CFE_PSP_Exception_SysTaskId_t sys_task_id;  /**< the BSP-specific task info (not osal abstracted id) */
+    CFE_PSP_Exception_ContextDataEntry_t context_info;
+};
+
+
+struct CFE_PSP_ExceptionStorage
+{
+    volatile uint32 NumWritten;
+    volatile uint32 NumRead;
+    struct CFE_PSP_Exception_LogData Entries[CFE_PSP_MAX_EXCEPTION_ENTRIES];
+};
+
+typedef struct CFE_PSP_Exception_LogData    CFE_PSP_Exception_LogData_t;
+typedef struct CFE_PSP_ExceptionStorage     CFE_PSP_ExceptionStorage_t;
+
+
+#endif /* CFE_PSP_EXCEPTIONSTORAGE_TYPES_H_ */
diff --git a/fsw/shared/cfe_psp_memory.h b/fsw/shared/inc/cfe_psp_memory.h
similarity index 98%
rename from fsw/shared/cfe_psp_memory.h
rename to fsw/shared/inc/cfe_psp_memory.h
index 2a0ae905..6c42eb35 100644
--- a/fsw/shared/cfe_psp_memory.h
+++ b/fsw/shared/inc/cfe_psp_memory.h
@@ -40,7 +40,7 @@
 
 #include "common_types.h"
 #include "cfe_psp_config.h"
-#include "cfe_psp_exceptionstorage.h"
+#include "cfe_psp_exceptionstorage_types.h"
 
 typedef struct
 {
diff --git a/fsw/shared/cfe_psp_module.h b/fsw/shared/inc/cfe_psp_module.h
similarity index 100%
rename from fsw/shared/cfe_psp_module.h
rename to fsw/shared/inc/cfe_psp_module.h
diff --git a/fsw/shared/cfe_psp_configdata.c b/fsw/shared/src/cfe_psp_configdata.c
similarity index 100%
rename from fsw/shared/cfe_psp_configdata.c
rename to fsw/shared/src/cfe_psp_configdata.c
diff --git a/fsw/shared/cfe_psp_eeprom.c b/fsw/shared/src/cfe_psp_eeprom.c
similarity index 100%
rename from fsw/shared/cfe_psp_eeprom.c
rename to fsw/shared/src/cfe_psp_eeprom.c
diff --git a/fsw/shared/cfe_psp_exceptionstorage.c b/fsw/shared/src/cfe_psp_exceptionstorage.c
similarity index 99%
rename from fsw/shared/cfe_psp_exceptionstorage.c
rename to fsw/shared/src/cfe_psp_exceptionstorage.c
index a3843b57..749de91e 100644
--- a/fsw/shared/cfe_psp_exceptionstorage.c
+++ b/fsw/shared/src/cfe_psp_exceptionstorage.c
@@ -47,7 +47,8 @@
 
 #include "cfe_psp.h"
 #include "cfe_psp_config.h"
-#include "cfe_psp_exceptionstorage.h"
+#include "cfe_psp_exceptionstorage_types.h"
+#include "cfe_psp_exceptionstorage_api.h"
 #include "cfe_psp_memory.h"
 
 #include <target_config.h>
diff --git a/fsw/shared/cfe_psp_memrange.c b/fsw/shared/src/cfe_psp_memrange.c
similarity index 100%
rename from fsw/shared/cfe_psp_memrange.c
rename to fsw/shared/src/cfe_psp_memrange.c
diff --git a/fsw/shared/cfe_psp_memutils.c b/fsw/shared/src/cfe_psp_memutils.c
similarity index 100%
rename from fsw/shared/cfe_psp_memutils.c
rename to fsw/shared/src/cfe_psp_memutils.c
diff --git a/fsw/shared/cfe_psp_module.c b/fsw/shared/src/cfe_psp_module.c
similarity index 100%
rename from fsw/shared/cfe_psp_module.c
rename to fsw/shared/src/cfe_psp_module.c
diff --git a/fsw/shared/cfe_psp_port.c b/fsw/shared/src/cfe_psp_port.c
similarity index 100%
rename from fsw/shared/cfe_psp_port.c
rename to fsw/shared/src/cfe_psp_port.c
diff --git a/fsw/shared/cfe_psp_ram.c b/fsw/shared/src/cfe_psp_ram.c
similarity index 100%
rename from fsw/shared/cfe_psp_ram.c
rename to fsw/shared/src/cfe_psp_ram.c