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added CFA instruction parser, interpreter, and a dumper

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This commit is contained in:
Nikita Smith
2025-10-10 10:09:46 -07:00
parent c738768e41
commit 061b5c5955
10 changed files with 1198 additions and 1376 deletions
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src/dwarf/dwarf_parse.h
+55 -17
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@@ -370,9 +370,9 @@ typedef struct DW_DescriptorEntry
Rng1U64 entry_range;
} DW_DescriptorEntry;
typedef struct DW_UnpackedCIE
typedef struct DW_CIE
{
String8 init_insts;
String8 insts;
String8 aug_string;
String8 aug_data;
U64 code_align_factor;
@@ -382,25 +382,55 @@ typedef struct DW_UnpackedCIE
U8 version;
U8 address_size;
U8 segment_selector_size;
Rng1U64 cfi_range;
} DW_UnpackedCIE;
} DW_CIE;
typedef struct DW_UnpackedFDE
typedef struct DW_FDE
{
DW_Format format;
U64 cie_pointer;
Rng1U64 pc_range;
String8 insts;
Rng1U64 cfi_range;
} DW_UnpackedFDE;
DW_Format format;
U64 cie_pointer;
Rng1U64 pc_range;
String8 insts;
} DW_FDE;
#define DW_READ_CFI_PTR(name) U64 name(String8 data, U64 off, void *ud, U64 *ptr_out)
typedef DW_READ_CFI_PTR(DW_ReadCfiPtrFunc);
typedef union DW_CFA_Operand
{
U64 u64;
S64 s64;
String8 block;
} DW_CFA_Operand;
#define DW_CIE_FROM_OFFSET_FUNC(name) DW_UnpackedCIE * name(void *ud, U64 offset)
typedef enum
{
DW_CFA_ParseErrorCode_NewInst,
DW_CFA_ParseErrorCode_End,
DW_CFA_ParseErrorCode_OutOfData
} DW_CFA_ParseErrorCode;
typedef struct DW_CFA_Inst
{
DW_CFA_Opcode opcode;
DW_CFA_Operand operands[DW_CFA_OperandMax];
} DW_CFA_Inst;
typedef struct DW_CFA_InstNode
{
DW_CFA_Inst v;
struct DW_CFA_InstNode *next;
} DW_CFA_InstNode;
typedef struct DW_CFA_InstList
{
U64 count;
DW_CFA_InstNode *first;
DW_CFA_InstNode *last;
} DW_CFA_InstList;
#define DW_DECODE_PTR(name) U64 name(String8 data, void *ud, U64 *ptr_out)
typedef DW_DECODE_PTR(DW_DecodePtr);
#define DW_CIE_FROM_OFFSET_FUNC(name) DW_CIE * name(void *ud, U64 offset)
typedef DW_CIE_FROM_OFFSET_FUNC(DW_CIEFromOffsetFunc);
// hasher
internal U64 dw_hash_from_string(String8 string);
@@ -520,8 +550,16 @@ internal DW_Expr dw_expr_from_data(Arena *arena, DW_Format format, U64 addr_size
// debug frame
internal void dw_cfa_inst_list_push_node(DW_CFA_InstList *list, DW_CFA_InstNode *n);
internal DW_CFA_InstNode * dw_cfa_inst_list_push(Arena *arena, DW_CFA_InstList *list, DW_CFA_Inst v);
internal U64 dw_read_debug_frame_ptr(String8 data, DW_CIE *cie, U64 *ptr_out);
internal U64 dw_parse_descriptor_entry_header(String8 data, U64 off, DW_DescriptorEntry *desc_out);
internal B32 dw_unpack_cie(String8 data, DW_Format format, Arch arch, DW_UnpackedCIE *cie_out);
internal B32 dw_unpack_fde(String8 data, DW_Format format, DW_CIEFromOffsetFunc *cie_from_offset_func, void *cie_from_offset_ud, DW_UnpackedFDE *fde_out);
internal B32 dw_parse_cie(String8 data, DW_Format format, Arch arch, DW_CIE *cie_out);
internal B32 dw_parse_fde(String8 data, DW_Format format, DW_CIEFromOffsetFunc *cie_from_offset_func, void *cie_from_offset_ud, DW_FDE *fde_out);
internal DW_CFA_ParseErrorCode dw_parse_cfa_inst(String8 data, U64 code_align_factor, S64 data_align_factor, DW_DecodePtr *decode_ptr_func, void *decode_ptr_ud, U64 *bytes_read_out, DW_CFA_Inst *inst_out);
internal DW_CFA_InstList dw_parse_cfa_inst_list(Arena *arena, String8 data, U64 code_align_factor, S64 data_align_factor, DW_DecodePtr *decode_ptr_func, void *decode_ptr_ud);
#endif // DWARF_PARSE_H