initialize frame base in interp context

src/ctrl/ctrl_core.c

@@ -5513,10 +5513,11 @@ ctrl_thread__run(DMN_CtrlCtx *ctrl_ctx, CTRL_Msg *msg)
               ctx->reg_space.u64_0 = (U64)thread;
               ctx->module_base   = push_array(temp.arena, U64, 1);
               ctx->module_base[0]= module->vaddr_range.min;
+              ctx->frame_base    = push_array(temp.arena, U64, 1);
               ctx->tls_base      = push_array(temp.arena, U64, 1);
             }
-            e_select_interpret_ctx(&interpret_ctx);
-            
+            e_select_interpret_ctx(&interpret_ctx, type_ctx.primary_module->rdi, type_ctx.ip_voff);
+
             // rjf: evaluate
             E_Eval eval = zero_struct;
             ProfScope("evaluate expression")

src/eval/eval_interpret.c

@@ -11,9 +11,50 @@ e_selected_interpret_ctx(void)
 }
 
 internal void
-e_select_interpret_ctx(E_InterpretCtx *ctx)
+e_select_interpret_ctx(E_InterpretCtx *ctx, RDI_Parsed *primary_rdi, U64 ip_voff)
 {
   e_interpret_ctx = ctx;
+
+  // compute and apply frame base
+  {
+    E_Interpretation frame_base = { .code = ~0 };
+
+    RDI_Procedure *proc = rdi_procedure_from_voff(primary_rdi, ip_voff);
+    for(U64 loc_block_idx = proc->frame_base_location_first; loc_block_idx < proc->frame_base_location_opl; loc_block_idx += 1)
+    {
+      RDI_LocationBlock *block = rdi_element_from_name_idx(primary_rdi, LocationBlocks, loc_block_idx);
+      if (block->scope_off_first <= ip_voff && ip_voff < block->scope_off_opl) {
+        U64  all_location_data_size = 0;
+        U8  *all_location_data      = rdi_table_from_name(primary_rdi, LocationData, &all_location_data_size);
+        if(block->location_data_off + sizeof(RDI_LocationKind) <= all_location_data_size)
+        {
+          RDI_LocationKind loc_kind = *(RDI_LocationKind *)(all_location_data + block->location_data_off);
+          if(loc_kind == RDI_LocationKind_ValBytecodeStream || loc_kind == RDI_LocationKind_AddrBytecodeStream)
+          {
+            U8      *bytecode_ptr  = all_location_data + block->location_data_off + sizeof(RDI_LocationKind);
+            U8      *bytecode_opl  = all_location_data + all_location_data_size;
+            U64      bytecode_size = rdi_size_from_bytecode_stream(bytecode_ptr, bytecode_opl);
+            String8  bytecode      = str8(bytecode_ptr, bytecode_size);
+            frame_base = e_interpret(bytecode);
+          }
+          else if(loc_kind != RDI_LocationKind_NULL)
+          {
+            NotImplemented;
+          }
+        }
+        break;
+      }
+    }
+
+    if(frame_base.code == E_InterpretationCode_Good)
+    {
+      *ctx->frame_base = frame_base.value.u64;
+    }
+    else
+    {
+      ctx->frame_base = 0;
+    }
+  }
 }
 
 ////////////////////////////////

src/eval/eval_interpret.h

@@ -43,7 +43,7 @@ thread_static E_InterpretCtx *e_interpret_ctx = 0;
 //~ rjf: Context Selection Functions (Selection Required For All Subsequent APIs)
 
 internal E_InterpretCtx *e_selected_interpret_ctx(void);
-internal void e_select_interpret_ctx(E_InterpretCtx *ctx);
+internal void e_select_interpret_ctx(E_InterpretCtx *ctx, RDI_Parsed *primary_rdi, U64 ip_voff);
 
 ////////////////////////////////
 //~ rjf: Space Reading Helpers

src/raddbg/raddbg_core.c

@@ -12159,11 +12159,12 @@ rd_frame(void)
       ctx->reg_unwind_count  = unwind_count;
       ctx->module_base       = push_array(scratch.arena, U64, 1);
       ctx->module_base[0]    = module->vaddr_range.min;
+      ctx->frame_base        = push_array(scratch.arena, U64, 1);
       ctx->tls_base          = push_array(scratch.arena, U64, 1);
       ctx->tls_base[0]       = d_query_cached_tls_base_vaddr_from_process_root_rip(process, tls_root_vaddr, rip_vaddr);
     }
-    e_select_interpret_ctx(interpret_ctx);
-    
+    e_select_interpret_ctx(interpret_ctx, eval_modules_primary->rdi, rip_voff);
+
     ////////////////////////////
     //- rjf: build eval visualization view rule table
     //