diff --git a/Cargo.toml b/Cargo.toml
index f71705b021..1d65b86102 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
 name = "wiggle"
 version = "0.1.0"
-authors = ["Jakub Konka <kubkonk@jakubkonka.com>"]
+authors = ["Pat Hickey <phickey@fastly.com>", "Jakub Konka <kubkonk@jakubkonka.com>"]
 edition = "2018"
 
 [dependencies]
-generate = { path = "crates/generate" }
-memory = { path = "crates/memory" }
+wiggle-generate = { path = "crates/generate" }
+wiggle-runtime = { path = "crates/runtime" }
 
 [dev-dependencies]
 proptest = "0.9"
@@ -14,6 +14,6 @@ proptest = "0.9"
 [workspace]
 members = [
   "crates/generate",
-  "crates/memory"
+  "crates/runtime"
 ]
 exclude = ["crates/WASI"]
diff --git a/crates/generate/Cargo.toml b/crates/generate/Cargo.toml
index 886fea8b3b..9926ca7f80 100644
--- a/crates/generate/Cargo.toml
+++ b/crates/generate/Cargo.toml
@@ -1,14 +1,14 @@
 [package]
-name = "generate"
+name = "wiggle-generate"
 version = "0.1.0"
-authors = ["Jakub Konka <kubkon@jakubkonka.com>"]
+authors = ["Pat Hickey <phickey@fastly.com>", "Jakub Konka <kubkon@jakubkonka.com>"]
 edition = "2018"
 
 [lib]
 proc-macro = true
 
 [dependencies]
-memory = { path = "../memory" }
+wiggle-runtime = { path = "../runtime" }
 witx = { path = "../WASI/tools/witx" }
 quote = "1.0"
 proc-macro2 = "1.0"
diff --git a/crates/generate/src/funcs.rs b/crates/generate/src/funcs.rs
index 336199d222..7c8ef19b90 100644
--- a/crates/generate/src/funcs.rs
+++ b/crates/generate/src/funcs.rs
@@ -30,7 +30,7 @@ pub fn define_func(names: &Names, func: &witx::InterfaceFunc) -> TokenStream {
     });
 
     let abi_args = quote!(
-            ctx: &mut #ctx_type, memory: &mut ::memory::GuestMemory,
+            ctx: &mut #ctx_type, memory: &mut wiggle_runtime::GuestMemory,
             #(#params),*
     );
     let abi_ret = if let Some(ret) = &coretype.ret {
@@ -62,8 +62,8 @@ pub fn define_func(names: &Names, func: &witx::InterfaceFunc) -> TokenStream {
             };
             let err_typename = names.type_ref(&tref, anon_lifetime());
             quote! {
-                let e = ::memory::GuestError::InFunc { funcname: #funcname, location: #location, err: Box::new(e) };
-                let err: #err_typename = ::memory::GuestErrorType::from_error(e, ctx);
+                let e = wiggle_runtime::GuestError::InFunc { funcname: #funcname, location: #location, err: Box::new(e) };
+                let err: #err_typename = wiggle_runtime::GuestErrorType::from_error(e, ctx);
                 return #abi_ret::from(err);
             }
         } else {
@@ -111,7 +111,7 @@ pub fn define_func(names: &Names, func: &witx::InterfaceFunc) -> TokenStream {
     let success = if let Some(ref err_type) = err_type {
         let err_typename = names.type_ref(&err_type, anon_lifetime());
         quote! {
-            let success:#err_typename = ::memory::GuestErrorType::success();
+            let success:#err_typename = wiggle_runtime::GuestErrorType::success();
             #abi_ret::from(success)
         }
     } else {
diff --git a/crates/generate/src/names.rs b/crates/generate/src/names.rs
index 3759113218..504f9ab67b 100644
--- a/crates/generate/src/names.rs
+++ b/crates/generate/src/names.rs
@@ -62,11 +62,11 @@ impl Names {
                 witx::Type::Builtin(builtin) => self.builtin_type(*builtin),
                 witx::Type::Pointer(pointee) => {
                     let pointee_type = self.type_ref(&pointee, lifetime.clone());
-                    quote!(::memory::GuestPtrMut<#lifetime, #pointee_type>)
+                    quote!(wiggle_runtime::GuestPtrMut<#lifetime, #pointee_type>)
                 }
                 witx::Type::ConstPointer(pointee) => {
                     let pointee_type = self.type_ref(&pointee, lifetime.clone());
-                    quote!(::memory::GuestPtr<#lifetime, #pointee_type>)
+                    quote!(wiggle_runtime::GuestPtr<#lifetime, #pointee_type>)
                 }
                 _ => unimplemented!("anonymous type ref"),
             },
diff --git a/crates/generate/src/types.rs b/crates/generate/src/types.rs
index f5bfd42bd1..10e34894db 100644
--- a/crates/generate/src/types.rs
+++ b/crates/generate/src/types.rs
@@ -21,11 +21,14 @@ pub fn define_datatype(names: &Names, namedtype: &witx::NamedType) -> TokenStrea
             witx::Type::Union(_) => unimplemented!("union types"),
             witx::Type::Handle(_h) => unimplemented!("handle types"),
             witx::Type::Builtin(b) => define_builtin(names, &namedtype.name, *b),
-            witx::Type::Pointer(p) => {
-                define_witx_pointer(names, &namedtype.name, quote!(::memory::GuestPtrMut), p)
-            }
+            witx::Type::Pointer(p) => define_witx_pointer(
+                names,
+                &namedtype.name,
+                quote!(wiggle_runtime::GuestPtrMut),
+                p,
+            ),
             witx::Type::ConstPointer(p) => {
-                define_witx_pointer(names, &namedtype.name, quote!(::memory::GuestPtr), p)
+                define_witx_pointer(names, &namedtype.name, quote!(wiggle_runtime::GuestPtr), p)
             }
             witx::Type::Array { .. } => unimplemented!("array types"),
         },
@@ -69,18 +72,18 @@ fn define_enum(names: &Names, name: &witx::Id, e: &witx::EnumDatatype) -> TokenS
         }
 
         impl ::std::convert::TryFrom<#repr> for #ident {
-            type Error = ::memory::GuestError;
-            fn try_from(value: #repr) -> Result<#ident, ::memory::GuestError> {
+            type Error = wiggle_runtime::GuestError;
+            fn try_from(value: #repr) -> Result<#ident, wiggle_runtime::GuestError> {
                 match value as usize {
                     #(#tryfrom_repr_cases),*,
-                    _ => Err(::memory::GuestError::InvalidEnumValue(stringify!(#ident))),
+                    _ => Err(wiggle_runtime::GuestError::InvalidEnumValue(stringify!(#ident))),
                 }
             }
         }
 
         impl ::std::convert::TryFrom<#abi_repr> for #ident {
-            type Error = ::memory::GuestError;
-            fn try_from(value: #abi_repr) -> Result<#ident, ::memory::GuestError> {
+            type Error = wiggle_runtime::GuestError;
+            fn try_from(value: #abi_repr) -> Result<#ident, wiggle_runtime::GuestError> {
                 #ident::try_from(value as #repr)
             }
         }
@@ -99,7 +102,7 @@ fn define_enum(names: &Names, name: &witx::Id, e: &witx::EnumDatatype) -> TokenS
             }
         }
 
-        impl ::memory::GuestType for #ident {
+        impl wiggle_runtime::GuestType for #ident {
             fn size() -> u32 {
                 ::std::mem::size_of::<#repr>() as u32
             }
@@ -109,7 +112,7 @@ fn define_enum(names: &Names, name: &witx::Id, e: &witx::EnumDatatype) -> TokenS
             fn name() -> String {
                 stringify!(#ident).to_owned()
             }
-            fn validate<'a>(location: &::memory::GuestPtr<'a, #ident>) -> Result<(), ::memory::GuestError> {
+            fn validate<'a>(location: &wiggle_runtime::GuestPtr<'a, #ident>) -> Result<(), wiggle_runtime::GuestError> {
                 use ::std::convert::TryFrom;
                 let raw: #repr = unsafe { (location.as_raw() as *const #repr).read() };
                 let _ = #ident::try_from(raw)?;
@@ -117,15 +120,15 @@ fn define_enum(names: &Names, name: &witx::Id, e: &witx::EnumDatatype) -> TokenS
             }
         }
 
-        impl ::memory::GuestTypeCopy for #ident {}
-        impl ::memory::GuestTypeClone for #ident {
-            fn read_from_guest(location: &::memory::GuestPtr<#ident>) -> Result<#ident, ::memory::GuestError> {
+        impl wiggle_runtime::GuestTypeCopy for #ident {}
+        impl wiggle_runtime::GuestTypeClone for #ident {
+            fn read_from_guest(location: &wiggle_runtime::GuestPtr<#ident>) -> Result<#ident, wiggle_runtime::GuestError> {
                 use ::std::convert::TryFrom;
                 let raw: #repr = unsafe { (location.as_raw() as *const #repr).read() };
                 let val = #ident::try_from(raw)?;
                 Ok(val)
             }
-            fn write_to_guest(&self, location: &::memory::GuestPtrMut<#ident>) {
+            fn write_to_guest(&self, location: &wiggle_runtime::GuestPtrMut<#ident>) {
                 let val: #repr = #repr::from(*self);
                 unsafe { (location.as_raw() as *mut #repr).write(val) };
             }
@@ -192,13 +195,13 @@ fn define_copy_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype)
         quote! {
             #type_::validate(
                 &ptr.cast(#offset).map_err(|e|
-                    ::memory::GuestError::InDataField{
+                    wiggle_runtime::GuestError::InDataField{
                         typename: stringify!(#ident).to_owned(),
                         field: stringify!(#fieldname).to_owned(),
                         err: Box::new(e),
                     })?
                 ).map_err(|e|
-                    ::memory::GuestError::InDataField {
+                    wiggle_runtime::GuestError::InDataField {
                         typename: stringify!(#ident).to_owned(),
                         field: stringify!(#fieldname).to_owned(),
                         err: Box::new(e),
@@ -213,7 +216,7 @@ fn define_copy_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype)
             #(#member_decls),*
         }
 
-        impl ::memory::GuestType for #ident {
+        impl wiggle_runtime::GuestType for #ident {
             fn size() -> u32 {
                 #size
             }
@@ -223,12 +226,12 @@ fn define_copy_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype)
             fn name() -> String {
                 stringify!(#ident).to_owned()
             }
-            fn validate(ptr: &::memory::GuestPtr<#ident>) -> Result<(), ::memory::GuestError> {
+            fn validate(ptr: &wiggle_runtime::GuestPtr<#ident>) -> Result<(), wiggle_runtime::GuestError> {
                 #(#member_valids)*
                 Ok(())
             }
         }
-        impl ::memory::GuestTypeCopy for #ident {}
+        impl wiggle_runtime::GuestTypeCopy for #ident {}
     }
 }
 
@@ -246,11 +249,11 @@ fn define_ptr_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype) -
                 witx::Type::Builtin(builtin) => names.builtin_type(*builtin),
                 witx::Type::Pointer(pointee) => {
                     let pointee_type = names.type_ref(&pointee, quote!('a));
-                    quote!(::memory::GuestPtrMut<'a, #pointee_type>)
+                    quote!(wiggle_runtime::GuestPtrMut<'a, #pointee_type>)
                 }
                 witx::Type::ConstPointer(pointee) => {
                     let pointee_type = names.type_ref(&pointee, quote!('a));
-                    quote!(::memory::GuestPtr<'a, #pointee_type>)
+                    quote!(wiggle_runtime::GuestPtr<'a, #pointee_type>)
                 }
                 _ => unimplemented!("other anonymous struct members"),
             },
@@ -264,11 +267,11 @@ fn define_ptr_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype) -
                 witx::Type::Builtin(builtin) => names.builtin_type(*builtin),
                 witx::Type::Pointer(pointee) => {
                     let pointee_type = names.type_ref(&pointee, anon_lifetime());
-                    quote!(::memory::GuestPtrMut::<#pointee_type>)
+                    quote!(wiggle_runtime::GuestPtrMut::<#pointee_type>)
                 }
                 witx::Type::ConstPointer(pointee) => {
                     let pointee_type = names.type_ref(&pointee, anon_lifetime());
-                    quote!(::memory::GuestPtr::<#pointee_type>)
+                    quote!(wiggle_runtime::GuestPtr::<#pointee_type>)
                 }
                 _ => unimplemented!("other anonymous struct members"),
             },
@@ -278,13 +281,13 @@ fn define_ptr_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype) -
         quote! {
             #type_::validate(
                 &ptr.cast(#offset).map_err(|e|
-                    ::memory::GuestError::InDataField{
+                    wiggle_runtime::GuestError::InDataField{
                         typename: stringify!(#ident).to_owned(),
                         field: stringify!(#fieldname).to_owned(),
                         err: Box::new(e),
                     })?
                 ).map_err(|e|
-                    ::memory::GuestError::InDataField {
+                    wiggle_runtime::GuestError::InDataField {
                         typename: stringify!(#ident).to_owned(),
                         field: stringify!(#fieldname).to_owned(),
                         err: Box::new(e),
@@ -312,13 +315,13 @@ fn define_ptr_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype) -
                 witx::Type::Pointer(pointee) => {
                     let pointee_type = names.type_ref(&pointee, anon_lifetime());
                     quote! {
-                        let #name = ::memory::GuestPtrMut::<#pointee_type>::read_from_guest(&location.cast(#offset)?)?;
+                        let #name = wiggle_runtime::GuestPtrMut::<#pointee_type>::read_from_guest(&location.cast(#offset)?)?;
                     }
                 }
                 witx::Type::ConstPointer(pointee) => {
                     let pointee_type = names.type_ref(&pointee, anon_lifetime());
                     quote! {
-                        let #name = ::memory::GuestPtr::<#pointee_type>::read_from_guest(&location.cast(#offset)?)?;
+                        let #name = wiggle_runtime::GuestPtr::<#pointee_type>::read_from_guest(&location.cast(#offset)?)?;
                     }
                 }
                 _ => unimplemented!("other anonymous struct members"),
@@ -338,7 +341,7 @@ fn define_ptr_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype) -
             #(#member_decls),*
         }
 
-        impl<'a> ::memory::GuestType for #ident<'a> {
+        impl<'a> wiggle_runtime::GuestType for #ident<'a> {
             fn size() -> u32 {
                 #size
             }
@@ -348,17 +351,17 @@ fn define_ptr_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype) -
             fn name() -> String {
                 stringify!(#ident).to_owned()
             }
-            fn validate(ptr: &::memory::GuestPtr<#ident>) -> Result<(), ::memory::GuestError> {
+            fn validate(ptr: &wiggle_runtime::GuestPtr<#ident>) -> Result<(), wiggle_runtime::GuestError> {
                 #(#member_valids)*
                 Ok(())
             }
         }
-        impl<'a> ::memory::GuestTypePtr<'a> for #ident<'a> {
-            fn read_from_guest(location: &::memory::GuestPtr<'a, #ident<'a>>) -> Result<#ident<'a>, ::memory::GuestError> {
+        impl<'a> wiggle_runtime::GuestTypePtr<'a> for #ident<'a> {
+            fn read_from_guest(location: &wiggle_runtime::GuestPtr<'a, #ident<'a>>) -> Result<#ident<'a>, wiggle_runtime::GuestError> {
                 #(#member_reads)*
                 Ok(#ident { #(#member_names),* })
             }
-            fn write_to_guest(&self, location: &::memory::GuestPtrMut<'a, Self>) {
+            fn write_to_guest(&self, location: &wiggle_runtime::GuestPtrMut<'a, Self>) {
                 #(#member_writes)*
             }
         }
diff --git a/crates/memory/Cargo.toml b/crates/memory/Cargo.toml
deleted file mode 100644
index f605782c99..0000000000
--- a/crates/memory/Cargo.toml
+++ /dev/null
@@ -1,10 +0,0 @@
-[package]
-name = "memory"
-version = "0.1.0"
-authors = ["Pat Hickey <phickey@fastly.com>"]
-edition = "2018"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-thiserror = "1"
diff --git a/crates/memory/.gitignore b/crates/runtime/.gitignore
similarity index 100%
rename from crates/memory/.gitignore
rename to crates/runtime/.gitignore
diff --git a/crates/runtime/Cargo.toml b/crates/runtime/Cargo.toml
new file mode 100644
index 0000000000..4e711424de
--- /dev/null
+++ b/crates/runtime/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "wiggle-runtime"
+version = "0.1.0"
+authors = ["Pat Hickey <phickey@fastly.com>", "Jakub Konka <kubkon@jakubkonka.com>"]
+edition = "2018"
+
+[dependencies]
+thiserror = "1"
diff --git a/crates/memory/src/borrow.rs b/crates/runtime/src/borrow.rs
similarity index 100%
rename from crates/memory/src/borrow.rs
rename to crates/runtime/src/borrow.rs
diff --git a/crates/memory/src/error.rs b/crates/runtime/src/error.rs
similarity index 100%
rename from crates/memory/src/error.rs
rename to crates/runtime/src/error.rs
diff --git a/crates/memory/src/guest_type.rs b/crates/runtime/src/guest_type.rs
similarity index 100%
rename from crates/memory/src/guest_type.rs
rename to crates/runtime/src/guest_type.rs
diff --git a/crates/memory/src/lib.rs b/crates/runtime/src/lib.rs
similarity index 71%
rename from crates/memory/src/lib.rs
rename to crates/runtime/src/lib.rs
index fa1824f3b6..6f2b17ecfc 100644
--- a/crates/memory/src/lib.rs
+++ b/crates/runtime/src/lib.rs
@@ -4,7 +4,7 @@ mod guest_type;
 mod memory;
 mod region;
 
-pub use self::memory::{GuestMemory, GuestPtr, GuestPtrMut, GuestRef, GuestRefMut};
 pub use error::GuestError;
 pub use guest_type::{GuestErrorType, GuestType, GuestTypeClone, GuestTypeCopy, GuestTypePtr};
+pub use memory::{GuestMemory, GuestPtr, GuestPtrMut, GuestRef, GuestRefMut};
 pub use region::Region;
diff --git a/crates/memory/src/memory/array.rs b/crates/runtime/src/memory/array.rs
similarity index 100%
rename from crates/memory/src/memory/array.rs
rename to crates/runtime/src/memory/array.rs
diff --git a/crates/memory/src/memory/mod.rs b/crates/runtime/src/memory/mod.rs
similarity index 100%
rename from crates/memory/src/memory/mod.rs
rename to crates/runtime/src/memory/mod.rs
diff --git a/crates/memory/src/memory/ptr.rs b/crates/runtime/src/memory/ptr.rs
similarity index 100%
rename from crates/memory/src/memory/ptr.rs
rename to crates/runtime/src/memory/ptr.rs
diff --git a/crates/memory/src/region.rs b/crates/runtime/src/region.rs
similarity index 100%
rename from crates/memory/src/region.rs
rename to crates/runtime/src/region.rs
diff --git a/tests/main.rs b/tests/main.rs
index c03a128d5a..89bfe21f52 100644
--- a/tests/main.rs
+++ b/tests/main.rs
@@ -1,13 +1,15 @@
-use memory::GuestRef;
 use proptest::prelude::*;
+use wiggle_runtime::{
+    GuestError, GuestErrorType, GuestMemory, GuestPtr, GuestPtrMut, GuestRef, GuestRefMut,
+};
 
-generate::from_witx!({
+wiggle_generate::from_witx!({
     witx: ["tests/test.witx"],
     ctx: WasiCtx,
 });
 
 pub struct WasiCtx {
-    guest_errors: Vec<::memory::GuestError>,
+    guest_errors: Vec<GuestError>,
 }
 
 impl WasiCtx {
@@ -27,17 +29,16 @@ impl foo::Foo for WasiCtx {
     fn baz(
         &mut self,
         input1: types::Excuse,
-        input2_ptr: ::memory::GuestPtrMut<types::Excuse>,
-        input3_ptr: ::memory::GuestPtr<types::Excuse>,
-        input4_ptr_ptr: ::memory::GuestPtrMut<::memory::GuestPtr<types::Excuse>>,
+        input2_ptr: GuestPtrMut<types::Excuse>,
+        input3_ptr: GuestPtr<types::Excuse>,
+        input4_ptr_ptr: GuestPtrMut<GuestPtr<types::Excuse>>,
     ) -> Result<(), types::Errno> {
         println!("BAZ input1 {:?}", input1);
         // Read enum value from mutable:
-        let mut input2_ref: ::memory::GuestRefMut<types::Excuse> =
-            input2_ptr.as_ref_mut().map_err(|e| {
-                eprintln!("input2_ptr error: {}", e);
-                types::Errno::InvalidArg
-            })?;
+        let mut input2_ref: GuestRefMut<types::Excuse> = input2_ptr.as_ref_mut().map_err(|e| {
+            eprintln!("input2_ptr error: {}", e);
+            types::Errno::InvalidArg
+        })?;
         let input2: types::Excuse = *input2_ref;
         println!("input2 {:?}", input2);
 
@@ -53,7 +54,7 @@ impl foo::Foo for WasiCtx {
         println!("wrote to input2_ref {:?}", input3);
 
         // Read ptr value from mutable ptr:
-        let input4_ptr: ::memory::GuestPtr<types::Excuse> =
+        let input4_ptr: GuestPtr<types::Excuse> =
             input4_ptr_ptr.read_ptr_from_guest().map_err(|e| {
                 eprintln!("input4_ptr_ptr error: {}", e);
                 types::Errno::InvalidArg
@@ -96,12 +97,12 @@ impl foo::Foo for WasiCtx {
 // it must implement GuestErrorType with type Context = WasiCtx.
 // The context type should let you do logging or debugging or whatever you need
 // with these errors. We just push them to vecs.
-impl ::memory::GuestErrorType for types::Errno {
+impl GuestErrorType for types::Errno {
     type Context = WasiCtx;
     fn success() -> types::Errno {
         types::Errno::Ok
     }
-    fn from_error(e: ::memory::GuestError, ctx: &mut WasiCtx) -> types::Errno {
+    fn from_error(e: GuestError, ctx: &mut WasiCtx) -> types::Errno {
         eprintln!("GUEST ERROR: {:?}", e);
         ctx.guest_errors.push(e);
         types::Errno::InvalidArg
@@ -200,8 +201,7 @@ impl BatExercise {
     pub fn test(&self) {
         let mut ctx = WasiCtx::new();
         let mut host_memory = HostMemory::new();
-        let mut guest_memory =
-            memory::GuestMemory::new(host_memory.as_mut_ptr(), host_memory.len() as u32);
+        let mut guest_memory = GuestMemory::new(host_memory.as_mut_ptr(), host_memory.len() as u32);
 
         let bat_err = foo::bat(
             &mut ctx,
@@ -300,8 +300,7 @@ impl BazExercise {
     pub fn test(&self) {
         let mut ctx = WasiCtx::new();
         let mut host_memory = HostMemory::new();
-        let mut guest_memory =
-            memory::GuestMemory::new(host_memory.as_mut_ptr(), host_memory.len() as u32);
+        let mut guest_memory = GuestMemory::new(host_memory.as_mut_ptr(), host_memory.len() as u32);
 
         *guest_memory
             .ptr_mut(self.input2_loc.ptr)
@@ -399,8 +398,7 @@ impl SumOfPairExercise {
     pub fn test(&self) {
         let mut ctx = WasiCtx::new();
         let mut host_memory = HostMemory::new();
-        let mut guest_memory =
-            memory::GuestMemory::new(host_memory.as_mut_ptr(), host_memory.len() as u32);
+        let mut guest_memory = GuestMemory::new(host_memory.as_mut_ptr(), host_memory.len() as u32);
 
         *guest_memory
             .ptr_mut(self.input_loc.ptr)
@@ -492,8 +490,7 @@ impl SumPairPtrsExercise {
     pub fn test(&self) {
         let mut ctx = WasiCtx::new();
         let mut host_memory = HostMemory::new();
-        let mut guest_memory =
-            memory::GuestMemory::new(host_memory.as_mut_ptr(), host_memory.len() as u32);
+        let mut guest_memory = GuestMemory::new(host_memory.as_mut_ptr(), host_memory.len() as u32);
 
         *guest_memory
             .ptr_mut(self.input_first_loc.ptr)