[Pal] add pal_text to pal_control

When LibOS handles signal, it needs to know if it interrupted PAL or not.
If it's in PAL, LibOS should queue async signal and handle it later.

Signed-off-by: Isaku Yamahata <isaku.yamahata@gmail.com>

Pal/src/host/Linux-SGX/db_main.c

@@ -389,6 +389,8 @@ void pal_linux_main(char * uptr_args, uint64_t args_size,
     pal_state.root_config = root_config;
     __pal_control.manifest_preload.start = (PAL_PTR) manifest_addr;
     __pal_control.manifest_preload.end = (PAL_PTR) manifest_addr + manifest_size;
+    __pal_control.pal_text.start = TEXT_START;
+    __pal_control.pal_text.end = TEXT_END;
 
     if ((rv = init_trusted_platform()) < 0) {
         SGX_DBG(DBG_E, "Failed to verify the platform using remote attestation: %d\n", rv);

Pal/src/host/Linux/db_main.c

@@ -227,6 +227,8 @@ void pal_linux_main (void * args)
 
     ELF_DYNAMIC_RELOCATE(&pal_map);
 
+    __pal_control.pal_text.start = TEXT_START;
+    __pal_control.pal_text.end = TEXT_END;
     linux_state.environ = envp;
 
     init_slab_mgr(g_page_size);

Pal/src/pal.h

@@ -307,6 +307,8 @@ typedef struct {
     PAL_PTR_RANGE executable_range;
     /* manifest preloaded here */
     PAL_PTR_RANGE manifest_preload;
+    /* pal test area */
+    PAL_PTR_RANGE pal_text;
 
     /***** Host information *****/
     /* Host allocation alignment.