WIP DWARF writer

src/obj/obj.c

@@ -0,0 +1,68 @@
+// Copyright (c) Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+internal OBJ *
+obj_alloc(U64 time_stamp, Arch arch)
+{
+  Arena *arena = arena_alloc();
+  OBJ *obj        = push_array(arena, OBJ, 1);
+  obj->arena      = arena;
+  obj->time_stamp = time_stamp;
+  obj->arch       = arch;
+  return obj;
+}
+
+internal void
+obj_release(OBJ **obj_ptr)
+{
+  arena_release((*obj_ptr)->arena);
+  *obj_ptr = 0;
+}
+
+internal OBJ_Symbol *
+obj_push_symbol(OBJ *obj, String8 name, OBJ_SymbolScope scope, OBJ_RefKind ref_kind, void *ref)
+{
+  OBJ_SymbolNode *n = push_array(obj->arena, OBJ_SymbolNode, 1);
+  SLLQueuePush(obj->symbols.first, obj->symbols.last, n);
+  obj->symbols.count += 1;
+
+  OBJ_Symbol *v = &n->v;
+  v->name     = push_str8_copy(obj->arena, name);
+  v->scope    = scope;
+  v->ref_kind = ref_kind;
+  v->ref      = ref;
+
+  return v;
+}
+
+internal OBJ_Section *
+obj_push_section(OBJ *obj, String8 name, OBJ_SectionFlags flags)
+{
+  OBJ_SectionNode *n = push_array(obj->arena, OBJ_SectionNode, 1);
+  SLLQueuePush(obj->sections.first, obj->sections.last, n);
+  obj->sections.count += 1;
+
+  OBJ_Section *v = &n->v;
+  v->name   = push_str8_copy(obj->arena, name);
+  v->flags  = flags;
+  v->symbol = obj_push_symbol(obj, name, OBJ_SymbolScope_Local, OBJ_RefKind_Section, v);
+  str8_serial_begin(obj->arena, &v->data);
+
+  return v;
+}
+
+internal OBJ_Reloc *
+obj_push_reloc(OBJ *obj, OBJ_Section *sec, OBJ_RelocKind kind, U64 offset, OBJ_Symbol *symbol)
+{
+  OBJ_RelocNode *n = push_array(obj->arena, OBJ_RelocNode, 1);
+  SLLQueuePush(sec->relocs.first, sec->relocs.last, n);
+  sec->relocs.count += 1;
+
+  OBJ_Reloc *v = &n->v;
+  v->kind   = kind;
+  v->offset = offset;
+  v->symbol = symbol;
+
+  return v;
+}
+

src/obj/obj.h

@@ -0,0 +1,115 @@
+// Copyright (c) Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+#ifndef OBJ_H
+#define OBJ_H
+
+typedef enum
+{
+  OBJ_RefKind_Null,
+  OBJ_RefKind_Section,
+} OBJ_RefKind;
+
+typedef enum
+{
+  OBJ_SymbolScope_Null,
+  OBJ_SymbolScope_Local,
+  OBJ_SymbolScope_Global,
+} OBJ_SymbolScope;
+
+typedef struct OBJ_Symbol
+{
+  String8          name;
+  OBJ_SymbolScope  scope;
+  OBJ_RefKind      ref_kind;
+  void            *ref;
+} OBJ_Symbol;
+
+typedef struct OBJ_SymbolNode
+{
+  OBJ_Symbol             v;
+  struct OBJ_SymbolNode *next;
+} OBJ_SymbolNode;
+
+typedef struct OBJ_SymbolList
+{
+  U64             count;
+  OBJ_SymbolNode *first;
+  OBJ_SymbolNode *last;
+} OBJ_SymbolList;
+
+typedef enum
+{
+  OBJ_RelocKind_Null,
+  OBJ_RelocKind_SecRel,
+} OBJ_RelocKind;
+
+typedef struct OBJ_Reloc
+{
+  OBJ_RelocKind  kind;
+  U64            offset;
+  OBJ_Symbol    *symbol;
+} OBJ_Reloc;
+
+typedef struct OBJ_RelocNode
+{
+  OBJ_Reloc             v;
+  struct OBJ_RelocNode *next;
+} OBJ_RelocNode;
+
+typedef struct OBJ_RelocList
+{
+  U64            count;
+  OBJ_RelocNode *first;
+  OBJ_RelocNode *last;
+} OBJ_RelocList;
+
+typedef enum OBJ_SectionFlags
+{
+  OBJ_SectionFlag_Read  = (1 << 0),
+  OBJ_SectionFlag_Write = (1 << 1),
+  OBJ_SectionFlag_Exec  = (1 << 2),
+  OBJ_SectionFlag_Load  = (1 << 3),
+} OBJ_SectionFlags;
+
+typedef struct OBJ_Section
+{
+  String8          name;
+  String8List      data;
+  OBJ_SectionFlags flags;
+  OBJ_RelocList    relocs;
+  OBJ_Symbol      *symbol;
+} OBJ_Section;
+
+typedef struct OBJ_SectionNode
+{
+  OBJ_Section             v;
+  struct OBJ_SectionNode *next;
+} OBJ_SectionNode;
+
+typedef struct OBJ_SectionList
+{
+  U64              count;
+  OBJ_SectionNode *first;
+  OBJ_SectionNode *last;
+} OBJ_SectionList;
+
+typedef struct OBJ
+{
+  Arena          *arena;
+  U64             time_stamp;
+  Arch            arch;
+  OBJ_SectionList sections;
+  OBJ_SymbolList  symbols;
+} OBJ;
+
+////////////////////////////////
+
+internal OBJ *         obj_alloc(U64 time_stamp, Arch arch);
+internal void          obj_release(OBJ **obj_ptr);
+internal OBJ_Symbol *  obj_push_symbol(OBJ *obj, String8 name, OBJ_SymbolScope scope, OBJ_RefKind ref_kind, void *ref); 
+internal OBJ_Section * obj_push_section(OBJ *obj, String8 name, OBJ_SectionFlags flags);
+internal OBJ_Reloc *   obj_push_reloc(OBJ *obj, OBJ_Section *sec, OBJ_RelocKind kind, U64 offset, OBJ_Symbol *symbol);
+
+#endif // OBJ_H
+