diff --git a/src/rt/rust_upcall.cpp b/src/rt/rust_upcall.cpp
index 3bd705b66908..986bc7132136 100644
--- a/src/rt/rust_upcall.cpp
+++ b/src/rt/rust_upcall.cpp
@@ -143,66 +143,46 @@ upcall_trace(char const *msg,
  * Allocate an object in the exchange heap
  */
 
-extern "C" CDECL uintptr_t
-exchange_malloc(rust_task *task, type_desc *td, uintptr_t size) {
-
-    LOG(task, mem, "upcall exchange malloc(0x%" PRIxPTR ")", td);
-
-    size_t total_size = get_box_size(size, td->align);
-    void *p = task->kernel->calloc(total_size, "exchange malloc");
-
-    rust_opaque_box *header = static_cast<rust_opaque_box*>(p);
-    header->ref_count = -1; // This is not ref counted
-    header->td = td;
-    header->prev = 0;
-    header->next = 0;
-
-    return (uintptr_t)header;
-}
-
-// FIXME: remove after snapshot (6/13/12)
 struct s_exchange_malloc_args {
     rust_task *task;
     uintptr_t retval;
     type_desc *td;
-};
-
-extern "C" CDECL void
-upcall_s_exchange_malloc(s_exchange_malloc_args *args) {
-    rust_task *task = args->task;
-    LOG_UPCALL_ENTRY(task);
-
-    args->retval = exchange_malloc(task, args->td, args->td->size);
-}
-
-extern "C" CDECL uintptr_t
-upcall_exchange_malloc(type_desc *td) {
-    rust_task *task = rust_get_current_task();
-    s_exchange_malloc_args args = {task, 0, td};
-    UPCALL_SWITCH_STACK(task, &args, upcall_s_exchange_malloc);
-    return args.retval;
-}
-
-struct s_exchange_malloc_dyn_args {
-    rust_task *task;
-    uintptr_t retval;
-    type_desc *td;
     uintptr_t size;
 };
 
 extern "C" CDECL void
-upcall_s_exchange_malloc_dyn(s_exchange_malloc_dyn_args *args) {
+upcall_s_exchange_malloc(s_exchange_malloc_args *args) {
     rust_task *task = args->task;
     LOG_UPCALL_ENTRY(task);
+    LOG(task, mem, "upcall exchange malloc(0x%" PRIxPTR ")", args->td);
 
-    args->retval = exchange_malloc(task, args->td, args->size);
+    size_t total_size = get_box_size(args->size, args->td->align);
+    // FIXME--does this have to be calloc? (Issue #2682)
+    void *p = task->kernel->calloc(total_size, "exchange malloc");
+
+    rust_opaque_box *header = static_cast<rust_opaque_box*>(p);
+    header->ref_count = -1; // This is not ref counted
+    header->td = args->td;
+    header->prev = 0;
+    header->next = 0;
+
+    args->retval = (uintptr_t)header;
 }
 
+extern "C" CDECL uintptr_t
+upcall_exchange_malloc(type_desc *td, uintptr_t size) {
+    rust_task *task = rust_get_current_task();
+    s_exchange_malloc_args args = {task, 0, td, size};
+    UPCALL_SWITCH_STACK(task, &args, upcall_s_exchange_malloc);
+    return args.retval;
+}
+
+// FIXME: remove after snapshot (6/21/12)
 extern "C" CDECL uintptr_t
 upcall_exchange_malloc_dyn(type_desc *td, uintptr_t size) {
     rust_task *task = rust_get_current_task();
-    s_exchange_malloc_dyn_args args = {task, 0, td, size};
-    UPCALL_SWITCH_STACK(task, &args, upcall_s_exchange_malloc_dyn);
+    s_exchange_malloc_args args = {task, 0, td, size};
+    UPCALL_SWITCH_STACK(task, &args, upcall_s_exchange_malloc);
     return args.retval;
 }
 
@@ -229,69 +209,49 @@ upcall_exchange_free(void *ptr) {
  * Allocate an object in the task-local heap.
  */
 
-extern "C" CDECL uintptr_t
-shared_malloc(rust_task *task, type_desc *td, uintptr_t size) {
-    LOG(task, mem, "upcall malloc(0x%" PRIxPTR ")", td);
-
-    cc::maybe_cc(task);
-
-    // FIXME--does this have to be calloc?
-    rust_opaque_box *box = task->boxed.calloc(td, size);
-    void *body = box_body(box);
-
-    debug::maybe_track_origin(task, box);
-
-    LOG(task, mem,
-        "upcall malloc(0x%" PRIxPTR ") = box 0x%" PRIxPTR
-        " with body 0x%" PRIxPTR,
-        td, (uintptr_t)box, (uintptr_t)body);
-
-    return (uintptr_t)box;
-}
-
-// FIXME: remove after snapshot (6/13/12)
 struct s_malloc_args {
     rust_task *task;
     uintptr_t retval;
     type_desc *td;
-};
-
-extern "C" CDECL void
-upcall_s_malloc(s_malloc_args *args) {
-    rust_task *task = args->task;
-    LOG_UPCALL_ENTRY(task);
-
-    args->retval = shared_malloc(task, args->td, args->td->size);
-}
-
-extern "C" CDECL uintptr_t
-upcall_malloc(type_desc *td) {
-    rust_task *task = rust_get_current_task();
-    s_malloc_args args = {task, 0, td};
-    UPCALL_SWITCH_STACK(task, &args, upcall_s_malloc);
-    return args.retval;
-}
-
-struct s_malloc_dyn_args {
-    rust_task *task;
-    uintptr_t retval;
-    type_desc *td;
     uintptr_t size;
 };
 
 extern "C" CDECL void
-upcall_s_malloc_dyn(s_malloc_dyn_args *args) {
+upcall_s_malloc(s_malloc_args *args) {
     rust_task *task = args->task;
     LOG_UPCALL_ENTRY(task);
+    LOG(task, mem, "upcall malloc(0x%" PRIxPTR ")", args->td);
 
-    args->retval = shared_malloc(task, args->td, args->size);
+    cc::maybe_cc(task);
+
+    // FIXME--does this have to be calloc? (Issue #2682)
+    rust_opaque_box *box = task->boxed.calloc(args->td, args->size);
+    void *body = box_body(box);
+
+    debug::maybe_track_origin(task, box);
+
+    LOG(task, mem,
+        "upcall malloc(0x%" PRIxPTR ") = box 0x%" PRIxPTR
+        " with body 0x%" PRIxPTR,
+        args->td, (uintptr_t)box, (uintptr_t)body);
+
+    args->retval = (uintptr_t)box;
 }
 
+extern "C" CDECL uintptr_t
+upcall_malloc(type_desc *td, uintptr_t size) {
+    rust_task *task = rust_get_current_task();
+    s_malloc_args args = {task, 0, td, size};
+    UPCALL_SWITCH_STACK(task, &args, upcall_s_malloc);
+    return args.retval;
+}
+
+// FIXME: remove after snapshot (6/21/12)
 extern "C" CDECL uintptr_t
 upcall_malloc_dyn(type_desc *td, uintptr_t size) {
     rust_task *task = rust_get_current_task();
-    s_malloc_dyn_args args = {task, 0, td, size};
-    UPCALL_SWITCH_STACK(task, &args, upcall_s_malloc_dyn);
+    s_malloc_args args = {task, 0, td, size};
+    UPCALL_SWITCH_STACK(task, &args, upcall_s_malloc);
     return args.retval;
 }
 
diff --git a/src/rustc/back/upcall.rs b/src/rustc/back/upcall.rs
index e6a61a1d0783..2cae381431d0 100644
--- a/src/rustc/back/upcall.rs
+++ b/src/rustc/back/upcall.rs
@@ -10,9 +10,9 @@ import lib::llvm::{type_names, ModuleRef, ValueRef, TypeRef};
 type upcalls =
     {_fail: ValueRef,
      trace: ValueRef,
-     malloc_dyn: ValueRef,
+     malloc: ValueRef,
      free: ValueRef,
-     exchange_malloc_dyn: ValueRef,
+     exchange_malloc: ValueRef,
      exchange_free: ValueRef,
      validate_box: ValueRef,
      mark: ValueRef,
@@ -55,14 +55,14 @@ fn declare_upcalls(targ_cfg: @session::config,
           trace: dv("trace", [T_ptr(T_i8()),
                               T_ptr(T_i8()),
                               int_t]),
-          malloc_dyn:
-              nothrow(d("malloc_dyn",
+          malloc:
+              nothrow(d("malloc",
                         [T_ptr(tydesc_type), int_t],
                         T_ptr(T_i8()))),
           free:
               nothrow(dv("free", [T_ptr(T_i8())])),
-          exchange_malloc_dyn:
-              nothrow(d("exchange_malloc_dyn",
+          exchange_malloc:
+              nothrow(d("exchange_malloc",
                         [T_ptr(tydesc_type), int_t],
                         T_ptr(T_i8()))),
           exchange_free:
diff --git a/src/rustc/middle/trans/base.rs b/src/rustc/middle/trans/base.rs
index c3ab41636a8a..b2c02c909c77 100644
--- a/src/rustc/middle/trans/base.rs
+++ b/src/rustc/middle/trans/base.rs
@@ -356,9 +356,9 @@ fn malloc_raw_dyn(bcx: block, t: ty::t, heap: heap,
     let ccx = bcx.ccx();
 
     let (mk_fn, upcall) = alt heap {
-      heap_shared { (ty::mk_imm_box, ccx.upcalls.malloc_dyn) }
+      heap_shared { (ty::mk_imm_box, ccx.upcalls.malloc) }
       heap_exchange {
-        (ty::mk_imm_uniq, ccx.upcalls.exchange_malloc_dyn )
+        (ty::mk_imm_uniq, ccx.upcalls.exchange_malloc )
       }
     };
 
diff --git a/src/rustc/middle/trans/closure.rs b/src/rustc/middle/trans/closure.rs
index fd66b34c8167..745c25f6f799 100644
--- a/src/rustc/middle/trans/closure.rs
+++ b/src/rustc/middle/trans/closure.rs
@@ -545,7 +545,7 @@ fn make_opaque_cbox_take_glue(
         let sz = Add(bcx, sz, shape::llsize_of(ccx, T_box_header(ccx)));
 
         // Allocate memory, update original ptr, and copy existing data
-        let malloc = ccx.upcalls.exchange_malloc_dyn;
+        let malloc = ccx.upcalls.exchange_malloc;
         let cbox_out = Call(bcx, malloc, [tydesc, sz]);
         let cbox_out = PointerCast(bcx, cbox_out, llopaquecboxty);
         call_memmove(bcx, cbox_out, cbox_in, sz);