- 0, SectionKind::getDataRelLocal()));
-
- // Create a symbol at the beginning of this section.
- MCSymbol *LineStartSym = getContext().CreateTempSymbol();
- // Set the value of the symbol, as we are at the start of the section.
- EmitLabel(LineStartSym);
-
- // Create a symbol for the end of the section (to be set when we get there).
- MCSymbol *LineEndSym = getContext().CreateTempSymbol();
-
- // The first 4 bytes is the total length of the information for this
- // compilation unit (not including these 4 bytes for the length).
- EmitValue(MakeStartMinusEndExpr(LineStartSym, LineEndSym, 4), 4, 0);
-
- // Next 2 bytes is the Version, which is Dwarf 2.
- EmitIntValue(2, 2);
-
- // Create a symbol for the end of the prologue (to be set when we get there).
- MCSymbol *ProEndSym = getContext().CreateTempSymbol(); // Lprologue_end
-
- // Length of the prologue, is the next 4 bytes. Which is the start of the
- // section to the end of the prologue. Not including the 4 bytes for the
- // total length, the 2 bytes for the version, and these 4 bytes for the
- // length of the prologue.
- EmitValue(MakeStartMinusEndExpr(LineStartSym, ProEndSym, (4 + 2 + 4)), 4, 0);
-
- // Parameters of the state machine, are next.
- // Define the architecture-dependent minimum instruction length (in
- // bytes). This value should be rather too small than too big. */
- // DWARF2_LINE_MIN_INSN_LENGTH
- EmitIntValue(1, 1);
- // Flag that indicates the initial value of the is_stmt_start flag.
- // DWARF2_LINE_DEFAULT_IS_STMT
- EmitIntValue(1, 1);
- // Minimum line offset in a special line info. opcode. This value
- // was chosen to give a reasonable range of values. */
- // DWARF2_LINE_BASE
- EmitIntValue(-5, 1);
- // Range of line offsets in a special line info. opcode.
- // DWARF2_LINE_RANGE
- EmitIntValue(14, 1);
- // First special line opcode - leave room for the standard opcodes.
- // DWARF2_LINE_OPCODE_BASE
- EmitIntValue(13, 1);
-
- // Standard opcode lengths
- EmitIntValue(0, 1); // length of DW_LNS_copy
- EmitIntValue(1, 1); // length of DW_LNS_advance_pc
- EmitIntValue(1, 1); // length of DW_LNS_advance_line
- EmitIntValue(1, 1); // length of DW_LNS_set_file
- EmitIntValue(1, 1); // length of DW_LNS_set_column
- EmitIntValue(0, 1); // length of DW_LNS_negate_stmt
- EmitIntValue(0, 1); // length of DW_LNS_set_basic_block
- EmitIntValue(0, 1); // length of DW_LNS_const_add_pc
- EmitIntValue(1, 1); // length of DW_LNS_fixed_advance_pc
- EmitIntValue(0, 1); // length of DW_LNS_set_prologue_end
- EmitIntValue(0, 1); // length of DW_LNS_set_epilogue_begin
- EmitIntValue(1, 1); // DW_LNS_set_isa
-
- // Put out the directory and file tables.
-
- // First the directory table.
- const std::vector<StringRef> &MCDwarfDirs =
- getContext().getMCDwarfDirs();
- for (unsigned i = 0; i < MCDwarfDirs.size(); i++) {
- EmitBytes(MCDwarfDirs[i], 0); // the DirectoryName
- EmitBytes(StringRef("\0", 1), 0); // the null termination of the string
- }
- EmitIntValue(0, 1); // Terminate the directory list
-
- // Second the file table.
- for (unsigned i = 1; i < MCDwarfFiles.size(); i++) {
- EmitBytes(MCDwarfFiles[i]->getName(), 0); // FileName
- EmitBytes(StringRef("\0", 1), 0); // the null termination of the string
- // FIXME the Directory number should be a .uleb128 not a .byte
- EmitIntValue(MCDwarfFiles[i]->getDirIndex(), 1);
- EmitIntValue(0, 1); // last modification timestamp (always 0)
- EmitIntValue(0, 1); // filesize (always 0)