diff --git a/lib/mammoth/include/mammoth/channel.h b/lib/mammoth/include/mammoth/channel.h
index 4b96407..4fa5d8f 100644
--- a/lib/mammoth/include/mammoth/channel.h
+++ b/lib/mammoth/include/mammoth/channel.h
@@ -8,6 +8,7 @@ class Channel {
   Channel() {}
   void adopt_cap(uint64_t id);
   uint64_t release_cap();
+  uint64_t cap();
 
   z_err_t WriteStr(const char* msg);
   z_err_t ReadStr(char* buffer, uint64_t* size);
diff --git a/lib/mammoth/include/mammoth/memory_region.h b/lib/mammoth/include/mammoth/memory_region.h
index 78af053..215e0b8 100644
--- a/lib/mammoth/include/mammoth/memory_region.h
+++ b/lib/mammoth/include/mammoth/memory_region.h
@@ -15,6 +15,9 @@ class MappedMemoryRegion {
 
   uint64_t paddr() { return paddr_; }
   uint64_t vaddr() { return vaddr_; }
+  uint64_t size() { return size_; }
+
+  uint64_t cap() { return vmmo_cap_; }
 
   operator bool() { return vmmo_cap_ != 0; }
 
diff --git a/lib/mammoth/src/channel.cpp b/lib/mammoth/src/channel.cpp
index 07dcbfd..39e30ee 100644
--- a/lib/mammoth/src/channel.cpp
+++ b/lib/mammoth/src/channel.cpp
@@ -29,6 +29,8 @@ uint64_t Channel::release_cap() {
   return cap;
 }
 
+uint64_t Channel::cap() { return chan_cap_; }
+
 z_err_t Channel::WriteStr(const char* msg) {
   if (!chan_cap_) {
     return Z_ERR_NULL;
diff --git a/lib/mammoth/src/process.cpp b/lib/mammoth/src/process.cpp
index 883e290..4232ce3 100644
--- a/lib/mammoth/src/process.cpp
+++ b/lib/mammoth/src/process.cpp
@@ -69,7 +69,7 @@ uint64_t LoadElfProgram(uint64_t base, uint64_t as_cap) {
     dbgln("Create mem object");
 #endif
     uint64_t mem_cap;
-    uint64_t size = program.filesz;
+    uint64_t size = program.memsz;
     check(ZMemoryObjectCreate(size, &mem_cap));
 
 #if MAM_PROC_DEBUG