diff --git a/src/mapi/glapi/gen/ARB_base_instance.xml b/src/mapi/glapi/gen/ARB_base_instance.xml
index 56de639e907..5bd6cabf9c1 100644
--- a/src/mapi/glapi/gen/ARB_base_instance.xml
+++ b/src/mapi/glapi/gen/ARB_base_instance.xml
@@ -8,7 +8,7 @@
 
 <category name="GL_ARB_base_instance" number="107">
 
-  <function name="DrawArraysInstancedBaseInstance" exec="dynamic">
+  <function name="DrawArraysInstancedBaseInstance" exec="dynamic" marshal="draw">
     <param name="mode" type="GLenum"/>
     <param name="first" type="GLint"/>
     <param name="count" type="GLsizei"/>
@@ -16,7 +16,7 @@
     <param name="baseinstance" type="GLuint"/>
   </function>
 
-  <function name="DrawElementsInstancedBaseInstance" exec="dynamic">
+  <function name="DrawElementsInstancedBaseInstance" exec="dynamic" marshal="draw">
     <param name="mode" type="GLenum"/>
     <param name="count" type="GLsizei"/>
     <param name="type" type="GLenum"/>
@@ -25,7 +25,7 @@
     <param name="baseinstance" type="GLuint"/>
   </function>
 
-  <function name="DrawElementsInstancedBaseVertexBaseInstance" exec="dynamic">
+  <function name="DrawElementsInstancedBaseVertexBaseInstance" exec="dynamic" marshal="draw">
     <param name="mode" type="GLenum"/>
     <param name="count" type="GLsizei"/>
     <param name="type" type="GLenum"/>
diff --git a/src/mapi/glapi/gen/ARB_draw_elements_base_vertex.xml b/src/mapi/glapi/gen/ARB_draw_elements_base_vertex.xml
index 72aa62c7751..7c7a6a49588 100644
--- a/src/mapi/glapi/gen/ARB_draw_elements_base_vertex.xml
+++ b/src/mapi/glapi/gen/ARB_draw_elements_base_vertex.xml
@@ -8,7 +8,7 @@
 
 <category name="GL_ARB_draw_elements_base_vertex" number="62">
 
-    <function name="DrawElementsBaseVertex" es2="3.2" exec="dynamic">
+    <function name="DrawElementsBaseVertex" es2="3.2" exec="dynamic" marshal="draw">
         <param name="mode" type="GLenum"/>
         <param name="count" type="GLsizei"/>
         <param name="type" type="GLenum"/>
@@ -16,7 +16,7 @@
         <param name="basevertex" type="GLint"/>
     </function>
 
-    <function name="DrawRangeElementsBaseVertex" es2="3.2" exec="dynamic">
+    <function name="DrawRangeElementsBaseVertex" es2="3.2" exec="dynamic" marshal="draw">
         <param name="mode" type="GLenum"/>
         <param name="start" type="GLuint"/>
         <param name="end" type="GLuint"/>
@@ -26,7 +26,7 @@
         <param name="basevertex" type="GLint"/>
     </function>
 
-    <function name="MultiDrawElementsBaseVertex" exec="dynamic">
+    <function name="MultiDrawElementsBaseVertex" exec="dynamic" marshal="draw">
         <param name="mode" type="GLenum"/>
         <param name="count" type="const GLsizei *"/>
         <param name="type" type="GLenum"/>
@@ -35,7 +35,7 @@
         <param name="basevertex" type="const GLint *"/>
     </function>
 
-    <function name="DrawElementsInstancedBaseVertex" es2="3.2" exec="dynamic">
+    <function name="DrawElementsInstancedBaseVertex" es2="3.2" exec="dynamic" marshal="draw">
         <param name="mode" type="GLenum"/>
         <param name="count" type="GLsizei"/>
         <param name="type" type="GLenum"/>
diff --git a/src/mapi/glapi/gen/ARB_draw_instanced.xml b/src/mapi/glapi/gen/ARB_draw_instanced.xml
index b1c8221444a..52dba3cf3c3 100644
--- a/src/mapi/glapi/gen/ARB_draw_instanced.xml
+++ b/src/mapi/glapi/gen/ARB_draw_instanced.xml
@@ -8,14 +8,14 @@
 
 <category name="GL_ARB_draw_instanced" number="44">
 
-  <function name="DrawArraysInstancedARB" exec="dynamic">
+  <function name="DrawArraysInstancedARB" exec="dynamic" marshal="draw">
     <param name="mode" type="GLenum"/>
     <param name="first" type="GLint"/>
     <param name="count" type="GLsizei"/>
     <param name="primcount" type="GLsizei"/>
   </function>
 
-  <function name="DrawElementsInstancedARB" exec="dynamic">
+  <function name="DrawElementsInstancedARB" exec="dynamic" marshal="draw">
     <param name="mode" type="GLenum"/>
     <param name="count" type="GLsizei"/>
     <param name="type" type="GLenum"/>
diff --git a/src/mapi/glapi/gen/EXT_transform_feedback.xml b/src/mapi/glapi/gen/EXT_transform_feedback.xml
index 2aa26ad7251..bbb44866f91 100644
--- a/src/mapi/glapi/gen/EXT_transform_feedback.xml
+++ b/src/mapi/glapi/gen/EXT_transform_feedback.xml
@@ -108,7 +108,7 @@
   <function name="ResumeTransformFeedback" es2="3.0">
   </function>
 
-  <function name="DrawTransformFeedback" exec="dynamic">
+  <function name="DrawTransformFeedback" exec="dynamic" marshal="draw">
     <param name="mode" type="GLenum"/>
     <param name="id" type="GLuint"/>
   </function>
diff --git a/src/mapi/glapi/gen/gl_API.dtd b/src/mapi/glapi/gen/gl_API.dtd
index 78226513c46..133bc042aa9 100644
--- a/src/mapi/glapi/gen/gl_API.dtd
+++ b/src/mapi/glapi/gen/gl_API.dtd
@@ -38,7 +38,8 @@
                    es2                 CDATA   "none"
                    deprecated          CDATA   "none"
                    exec                NMTOKEN #IMPLIED
-                   desktop             (true | false) "true">
+                   desktop             (true | false) "true"
+                   marshal             NMTOKEN #IMPLIED>
 <!ATTLIST size     name                NMTOKEN #REQUIRED
                    count               NMTOKEN #IMPLIED
                    mode                (get | set) "set">
@@ -120,6 +121,14 @@ param:
         offset data should be padded to the next even number of dimensions.
         For example, this will insert an empty "height" field after the
         "width" field in the protocol for TexImage1D.
+     marshal - One of "sync", "async", "draw", or "custom", defaulting to
+        async unless one of the arguments is something we know we can't
+        codegen for.  If "sync", we finish any queued glthread work and call
+        the Mesa implementation directly.  If "async", we queue the function
+        call to be performed by glthread.  If "custom", the prototype will be
+        generated but a custom implementation will be present in marshal.c.
+        If "draw", it will follow the "async" rules except that "indices" are
+        ignored (since they may come from a VBO).
 
 glx:
      rop - Opcode value for "render" commands
diff --git a/src/mapi/glapi/gen/gl_API.xml b/src/mapi/glapi/gen/gl_API.xml
index 2c5444475f9..ce9ad172dc4 100644
--- a/src/mapi/glapi/gen/gl_API.xml
+++ b/src/mapi/glapi/gen/gl_API.xml
@@ -2366,11 +2366,19 @@
         <glx rop="139" handcode="client"/>
     </function>
 
-    <function name="Finish" es1="1.0" es2="2.0">
+    <function name="Finish" es1="1.0" es2="2.0" marshal="sync">
         <glx sop="108" handcode="true"/>
     </function>
 
-    <function name="Flush" es1="1.0" es2="2.0">
+    <!-- TODO: Flush is marshalled synchronously as a temporary hack
+    since we don't yet have a hook into SwapBuffers.
+
+    NOTE: when we remove this hack, we'll still have to handle Flush
+    specially to ensure that it causes all previous commands to get
+    delivered to the server thread.
+    -->
+
+    <function name="Flush" es1="1.0" es2="2.0" marshal="sync">
         <glx sop="142" handcode="true"/>
     </function>
 
@@ -2598,21 +2606,21 @@
         <glx sop="110" handcode="client"/>
     </function>
 
-    <function name="PixelMapfv" deprecated="3.1">
+    <function name="PixelMapfv" deprecated="3.1" marshal="sync">
         <param name="map" type="GLenum"/>
         <param name="mapsize" type="GLsizei" counter="true"/>
         <param name="values" type="const GLfloat *" count="mapsize"/>
         <glx rop="168" large="true"/>
     </function>
 
-    <function name="PixelMapuiv" deprecated="3.1">
+    <function name="PixelMapuiv" deprecated="3.1" marshal="sync">
         <param name="map" type="GLenum"/>
         <param name="mapsize" type="GLsizei" counter="true"/>
         <param name="values" type="const GLuint *" count="mapsize"/>
         <glx rop="169" large="true"/>
     </function>
 
-    <function name="PixelMapusv" deprecated="3.1">
+    <function name="PixelMapusv" deprecated="3.1" marshal="sync">
         <param name="map" type="GLenum"/>
         <param name="mapsize" type="GLsizei" counter="true"/>
         <param name="values" type="const GLushort *" count="mapsize"/>
@@ -3141,7 +3149,7 @@
     <enum name="CLIENT_VERTEX_ARRAY_BIT"                  value="0x00000002"/>
     <enum name="CLIENT_ALL_ATTRIB_BITS"                   value="0xFFFFFFFF"/>
 
-    <function name="ArrayElement" deprecated="3.1" exec="dynamic">
+    <function name="ArrayElement" deprecated="3.1" exec="dynamic" marshal="draw">
         <param name="i" type="GLint"/>
         <glx handcode="true"/>
     </function>
@@ -3159,14 +3167,14 @@
         <glx handcode="true"/>
     </function>
 
-    <function name="DrawArrays" es1="1.0" es2="2.0" exec="dynamic">
+    <function name="DrawArrays" es1="1.0" es2="2.0" exec="dynamic" marshal="draw">
         <param name="mode" type="GLenum"/>
         <param name="first" type="GLint"/>
         <param name="count" type="GLsizei"/>
         <glx rop="193" handcode="true"/>
     </function>
 
-    <function name="DrawElements" es1="1.0" es2="2.0" exec="dynamic">
+    <function name="DrawElements" es1="1.0" es2="2.0" exec="dynamic" marshal="draw">
         <param name="mode" type="GLenum"/>
         <param name="count" type="GLsizei"/>
         <param name="type" type="GLenum"/>
@@ -3723,7 +3731,7 @@
         <glx rop="4097"/>
     </function>
 
-    <function name="DrawRangeElements" es2="3.0" exec="dynamic">
+    <function name="DrawRangeElements" es2="3.0" exec="dynamic" marshal="draw">
         <param name="mode" type="GLenum"/>
         <param name="start" type="GLuint"/>
         <param name="end" type="GLuint"/>
@@ -4716,7 +4724,7 @@
         <glx handcode="true"/>
     </function>
 
-    <function name="MultiDrawArrays">
+    <function name="MultiDrawArrays" marshal="draw">
         <param name="mode" type="GLenum"/>
         <param name="first" type="const GLint *"/>
         <param name="count" type="const GLsizei *"/>
@@ -8089,7 +8097,7 @@
   <enum name="MAX_TRANSFORM_FEEDBACK_BUFFERS" value="0x8E70"/>
   <enum name="MAX_VERTEX_STREAMS"             value="0x8E71"/>
 
-  <function name="DrawTransformFeedbackStream" exec="dynamic">
+  <function name="DrawTransformFeedbackStream" exec="dynamic" marshal="draw">
     <param name="mode" type="GLenum"/>
     <param name="id" type="GLuint"/>
     <param name="stream" type="GLuint"/>
@@ -8137,13 +8145,13 @@
 <xi:include href="ARB_base_instance.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
 
 <category name="GL_ARB_transform_feedback_instanced" number="109">
-  <function name="DrawTransformFeedbackInstanced" exec="dynamic">
+  <function name="DrawTransformFeedbackInstanced" exec="dynamic" marshal="draw">
     <param name="mode" type="GLenum"/>
     <param name="id" type="GLuint"/>
     <param name="primcount" type="GLsizei"/>
   </function>
 
-  <function name="DrawTransformFeedbackStreamInstanced" exec="dynamic">
+  <function name="DrawTransformFeedbackStreamInstanced" exec="dynamic" marshal="draw">
     <param name="mode" type="GLenum"/>
     <param name="id" type="GLuint"/>
     <param name="stream" type="GLuint"/>
@@ -10199,7 +10207,7 @@
         <param name="primcount" type="GLsizei"/>
     </function>
 
-    <function name="MultiDrawElementsEXT" es1="1.0" es2="2.0" exec="dynamic">
+    <function name="MultiDrawElementsEXT" es1="1.0" es2="2.0" exec="dynamic" marshal="draw">
         <param name="mode" type="GLenum"/>
         <param name="count" type="const GLsizei *"/>
         <param name="type" type="GLenum"/>
@@ -11209,7 +11217,7 @@
 </category>
 
 <category name="GL_IBM_multimode_draw_arrays" number="200">
-    <function name="MultiModeDrawArraysIBM">
+    <function name="MultiModeDrawArraysIBM" marshal="draw">
         <param name="mode" type="const GLenum *"/>
         <param name="first" type="const GLint *"/>
         <param name="count" type="const GLsizei *"/>
@@ -11218,7 +11226,7 @@
         <glx handcode="true" ignore="true"/>
     </function>
 
-    <function name="MultiModeDrawElementsIBM">
+    <function name="MultiModeDrawElementsIBM" marshal="draw">
         <param name="mode" type="const GLenum *"/>
         <param name="count" type="const GLsizei *"/>
         <param name="type" type="GLenum"/>