dwarf parse/expr/unwind/dump 2 -> 1; move old stuff to obsolete

2026-08-14 17:28:07 +00:00 · 2026-06-02 12:11:14 -07:00
parent ef5fc82e9c
commit a2700de35d
27 changed files with 11634 additions and 11635 deletions
@@ -0,0 +1,81 @@
+// Copyright (c) Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+#ifndef DWARF_UNWIND_H
+#define DWARF_UNWIND_H
+
+typedef enum DW_CFI_RegisterRule
+{
+  DW_CFI_RegisterRule_Undefined,
+  DW_CFI_RegisterRule_SameValue,
+  DW_CFI_RegisterRule_Offset,
+  DW_CFI_RegisterRule_ValOffset,
+  DW_CFI_RegisterRule_Register,
+  DW_CFI_RegisterRule_Expression,
+  DW_CFI_RegisterRule_ValExpression,
+  DW_CFI_RegisterRule_Architectural
+} DW_CFI_RegisterRule;
+
+typedef enum DW_CFA_Rule
+{
+  DW_CFA_Rule_Null,
+  DW_CFA_Rule_RegOff,
+  DW_CFA_Rule_Expression
+} DW_CFA_Rule;
+
+typedef struct DW_CFA
+{
+  DW_CFA_Rule rule;
+  union {
+    struct {
+      DW_Reg reg;
+      S64    off;
+    };
+    String8 expr;
+  };
+} DW_CFA;
+
+typedef struct DW_CFI_Register
+{
+  DW_CFI_RegisterRule rule;
+  union {
+    S64     n;
+    String8 expr;
+  };
+} DW_CFI_Register;
+
+typedef struct DW_CFI_Row
+{
+  DW_CFA           cfa;
+  DW_CFI_Register *regs;
+  struct DW_CFI_Row *next;
+} DW_CFI_Row;
+
+typedef struct DW_CFI_Unwind
+{
+  DW_CFA_InstList  insts;
+  DW_CIE          *cie;
+  DW_FDE          *fde;
+  DW_CFI_Row      *initial_row;
+  DW_CFI_Row      *row;
+  DW_CFA_InstNode *curr_inst;
+  DW_CFI_Row      *free_rows;
+  U64              pc;
+  Arch             arch;
+  U64              reg_count;
+} DW_CFI_Unwind;
+
+////////////////////////////////
+
+internal DW_CFI_Row * dw_make_cfi_row(Arena *arena, U64 reg_count);
+internal DW_CFI_Row * dw_copy_cfi_row(Arena *arena, DW_CFI_Row *row, U64 reg_count);
+
+internal DW_CFI_Unwind * dw_cfi_unwind_init(Arena *arena, Arch arch, DW_CIE *cie, DW_FDE *fde, DW_DecodePtr *decode_ptr_func, void *decode_ptr_ud);
+internal B32             dw_cfi_next_row(Arena *arena, DW_CFI_Unwind *uw);
+
+internal DW_CFI_Row *    dw_cfi_row_from_pc(Arena *arena, Arch arch, struct DW_CIE *cie, struct DW_FDE *fde, DW_DecodePtr *decode_ptr_func, void *decode_ptr_ctx, U64 pc);
+internal MachineOpResult dw_compute_cfa(Arch arch, DW_CFI_Row *row, void *reg_block, MachineOp_MemRead *mem_read_func, void *mem_read_ud, U64 *cfa_out);
+internal MachineOpResult dw_cfi_apply_register_rules(Arch arch, U64 cfa, DW_CFI_Row *row, void *reg_block, MachineOp_MemRead *mem_read_func, void *mem_read_ud);
+
+#endif // DWARF_UNWIND_H
+