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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 1197 additions and 1375 deletions
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src/dwarf/dwarf.h
+66 -51
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@@ -1337,56 +1337,57 @@ typedef enum DW_LNCTEnum
DW_LNCT_UserHi = 0x3fff
} DW_LNCTEnum;
#define DW_CFA_Kind1_XList(X) \
X(Nop, 0x0) \
X(SetLoc, 0x1) \
X(AdvanceLoc1, 0x2) \
X(AdvanceLoc2, 0x3) \
X(AdvanceLoc4, 0x4) \
X(OffsetExt, 0x5) \
X(RestoreExt, 0x6) \
X(Undefined, 0x7) \
X(SameValue, 0x8) \
X(Register, 0x9) \
X(RememberState, 0xA) \
X(RestoreState, 0xB) \
X(DefCfa, 0xC) \
X(DefCfaRegister, 0xD) \
X(DefCfaOffset, 0xE) \
X(DefCfaExpr, 0xF) \
X(Expr, 0x10) \
X(OffsetExtSf, 0x11) \
X(DefCfaSf, 0x12) \
X(DefCfaOffsetSf, 0x13) \
X(ValOffset, 0x14) \
X(ValOffsetSf, 0x15) \
X(ValExpr, 0x16)
////////////////////////////////
// CFA
#define DW_CFA_Kind2_XList(X) \
X(AdvanceLoc, 0x40) \
X(Offset, 0x80) \
X(Restore, 0xC0)
typedef U8 DW_CFA;
typedef enum DW_CFAEnum
typedef enum
{
#define X(_N, _ID) DW_CFA_##_N = _ID,
DW_CFA_Kind1_XList(X)
DW_CFA_Kind2_XList(X)
DW_CFA_OperandType_Null,
DW_CFA_OperandType_Value,
DW_CFA_OperandType_Register,
DW_CFA_OperandType_Expression,
} DW_CFA_OperandType;
// (opcode name, opcode id, operand count, operand types)
#define DW_CFA_Kind_XList(X) \
X(Nop, 0x0) \
X(SetLoc, 0x1, DW_CFA_OperandType_Value) \
X(AdvanceLoc1, 0x2, DW_CFA_OperandType_Value) \
X(AdvanceLoc2, 0x3, DW_CFA_OperandType_Value) \
X(AdvanceLoc4, 0x4, DW_CFA_OperandType_Value) \
X(OffsetExt, 0x5, DW_CFA_OperandType_Register, DW_CFA_OperandType_Value) \
X(RestoreExt, 0x6) \
X(Undefined, 0x7, DW_CFA_OperandType_Register) \
X(SameValue, 0x8, DW_CFA_OperandType_Register) \
X(Register, 0x9, DW_CFA_OperandType_Register) \
X(RememberState, 0xa) \
X(RestoreState, 0xb) \
X(DefCfa, 0xc, DW_CFA_OperandType_Register, DW_CFA_OperandType_Value) \
X(DefCfaRegister, 0xd, DW_CFA_OperandType_Register) \
X(DefCfaOffset, 0xe, DW_CFA_OperandType_Value) \
X(DefCfaExpr, 0xf, DW_CFA_OperandType_Expression) \
X(Expr, 0x10, DW_CFA_OperandType_Expression) \
X(OffsetExtSf, 0x11, DW_CFA_OperandType_Register, DW_CFA_OperandType_Value) \
X(DefCfaSf, 0x12, DW_CFA_OperandType_Register, DW_CFA_OperandType_Value) \
X(DefCfaOffsetSf, 0x13, DW_CFA_OperandType_Value) \
X(ValOffset, 0x14, DW_CFA_OperandType_Register, DW_CFA_OperandType_Value) \
X(ValOffsetSf, 0x15, DW_CFA_OperandType_Register, DW_CFA_OperandType_Value) \
X(ValExpr, 0x16, DW_CFA_OperandType_Register, DW_CFA_OperandType_Expression) \
X(AdvanceLoc, 0x40, DW_CFA_OperandType_Value) \
X(Offset, 0x80, DW_CFA_OperandType_Register, DW_CFA_OperandType_Value) \
X(Restore, 0xc0, DW_CFA_OperandType_Register)
#define DW_CFA_OperandMax 2
#define DW_CFA_Mask_OpcodeHi 0xc0
#define DW_CFA_Mask_Operand 0x3f
typedef U8 DW_CFA_Opcode;
typedef enum DW_CFA_Enum
{
#define X(_N, _ID, ...) DW_CFA_##_N = _ID,
DW_CFA_Kind_XList(X)
#undef X
DW_CFA_OplKind1 = DW_CFA_ValExpr,
DW_CFA_OplKind2 = DW_CFA_Restore,
} DW_CFAEnum;
typedef U8 DW_CFAMask;
enum
{
// kind1: opcode: [0,5] zeroes:[6,7]; kind2: operand:[0,5] opcode:[6,7]
DW_CFAMask_OpcodeHi = 0xC0,
DW_CFAMask_Operand = 0x3F,
DW_CFAMask_Count = 2
};
} DW_CFA_Enum;
////////////////////////////////
// Expression Opcodes
@@ -1561,7 +1562,7 @@ X(RegvalType, 0xa5, 2, 0, 1) \
X(DerefType, 0xa6, 2, 1, 1) \
X(XDerefType, 0xa7, 2, 2, 1) \
X(Convert, 0xa8, 1, 1, 1) \
X(ReInterpret, 0xa9, 1, 1, 1)
X(Reinterpret, 0xa9, 1, 1, 1)
#define DW_Expr_GNU_XList(X) \
X(GNU_PushTlsAddress, 0xe0, 0, 0, 1) \
@@ -1589,7 +1590,7 @@ typedef enum DW_ExprOpEnum
//- Regs
#define DW_Regs_X86_XList(X) \
#define DW_Regs_X86_XList(X) \
X(Eax, 0, eax, 0, 4) \
X(Ecx, 1, ecx, 0, 4) \
X(Edx, 2, edx, 0, 4) \
@@ -1637,7 +1638,7 @@ X(Gs, 45, gs, 0, 2) \
X(Tr, 48, nil, 0, 0) \
X(Ldtr, 49, nil, 0, 0)
#define DW_Regs_X64_XList(X) \
#define DW_Regs_X64_XList(X) \
X(Rax, 0, rax, 0, 8) \
X(Rdx, 1, rdx, 0, 8) \
X(Rcx, 2, rcx, 0, 8) \
@@ -1723,6 +1724,7 @@ typedef enum DW_RegX86Enum
#define X(_N,_ID,...) DW_RegX86_##_N = _ID,
DW_Regs_X86_XList(X)
#undef X
DW_RegX86_Last
} DW_RegX86Enum;
typedef DW_Reg DW_RegX64;
@@ -1731,6 +1733,7 @@ typedef enum DW_RegX64Enum
#define X(_N,_ID,...) DW_RegX64_##_N = _ID,
DW_Regs_X64_XList(X)
#undef X
DW_RegX64_Last
} DW_RegX64Enum;
////////////////////////////////
@@ -1741,6 +1744,8 @@ internal U64 dw_reg_size_from_code_x64(DW_Reg reg_code);
internal U64 dw_reg_pos_from_code_x64(DW_Reg reg_code);
internal U64 dw_reg_size_from_code(Arch arch, DW_Reg reg_code);
internal U64 dw_reg_pos_from_code(Arch arch, DW_Reg reg_code);
internal U64 dw_reg_max_size_from_arch(Arch arch);
internal U64 dw_reg_count_from_arch(Arch arch);
//- Attrib Class Encodings
@@ -1781,6 +1786,16 @@ internal DW_AttribClass dw_pick_attrib_value_class(DW_Version ver, DW_Ext ext, B
internal U64 dw_pick_default_lower_bound(DW_Language lang);
internal U64 dw_operand_count_from_expr_op(DW_ExprOp op);
internal U64 dw_pop_count_from_expr_op(DW_ExprOp op);
internal U64 dw_push_count_from_expr_op(DW_ExprOp op);
////////////////////////////////
//~ CFA
internal U64 dw_operand_count_from_cfa_opcode(DW_CFA_Opcode opcode);
internal B32 dw_is_cfa_expr_opcode_invalid(DW_ExprOp opcode);
internal B32 dw_is_new_row_cfa_opcode(DW_CFA_Opcode opcode);
internal DW_CFA_OperandType * dw_operand_types_from_cfa_op(DW_CFA_Opcode opcode);
////////////////////////////////
//~ rjf: String <=> Enum
@@ -1801,6 +1816,6 @@ internal String8 dw_string_from_loc_list_entry_kind(Arena *arena, DW_LLE kind);
internal String8 dw_string_from_section_kind(Arena *arena, DW_SectionKind kind);
internal String8 dw_string_from_rng_list_entry_kind(Arena *arena, DW_RLE kind);
internal String8 dw_string_from_register(Arena *arena, Arch arch, U64 reg_id);
internal String8 dw_string_from_cfa_opcode(DW_CFA cfa_opcode);
internal String8 dw_string_from_cfa_opcode(DW_CFA_Opcodecfa_opcode);
#endif // DWARF_H