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parsers for CIE and FDE

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This commit is contained in:
Nikita Smith
2025-10-07 18:16:31 -07:00
parent 62ae5ca3f5
commit 7cf3eaf73f
2 changed files with 208 additions and 0 deletions
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src/dwarf/dwarf_parse.h
+54
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@@ -353,6 +353,54 @@ typedef struct DW_Expr
DW_ExprInst *last;
} DW_Expr;
////////////////////////////////
// .debug_frame
typedef enum
{
DW_DescriptorEntryType_Null,
DW_DescriptorEntryType_CIE,
DW_DescriptorEntryType_FDE
} DW_DescriptorEntryType;
typedef struct DW_DescriptorEntry
{
DW_DescriptorEntryType type;
DW_Format format;
Rng1U64 entry_range;
} DW_DescriptorEntry;
typedef struct DW_UnpackedCIE
{
String8 init_insts;
String8 aug_string;
String8 aug_data;
U64 code_align_factor;
S64 data_align_factor;
U64 ret_addr_reg;
DW_Format format;
U8 version;
U8 address_size;
U8 segment_selector_size;
Rng1U64 cfi_range;
} DW_UnpackedCIE;
typedef struct DW_UnpackedFDE
{
DW_Format format;
U64 cie_pointer;
Rng1U64 pc_range;
String8 insts;
Rng1U64 cfi_range;
} DW_UnpackedFDE;
#define DW_READ_CFI_PTR(name) U64 name(String8 data, U64 off, void *ud, U64 *ptr_out)
typedef DW_READ_CFI_PTR(DW_ReadCfiPtrFunc);
#define DW_CIE_FROM_OFFSET_FUNC(name) DW_UnpackedCIE * name(void *ud, U64 offset)
typedef DW_CIE_FROM_OFFSET_FUNC(DW_CIEFromOffsetFunc);
// hasher
internal U64 dw_hash_from_string(String8 string);
@@ -470,4 +518,10 @@ internal DW_PubStringsTable dw_v4_pub_strings_table_from_section_kind(Arena *are
internal DW_Expr dw_expr_from_data(Arena *arena, DW_Format format, U64 addr_size, String8 data);
// debug frame
internal U64 dw_parse_descriptor_entry_header(String8 data, U64 off, DW_DescriptorEntry *desc_out);
internal B32 dw_unpack_cie(String8 data, Arch arch, DW_Format format, 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);
#endif // DWARF_PARSE_H