Subsections

DWARF Definition

This section^3.18defines the Debug With Arbitrary Record Format (DWARF) debugging format for the AMD64 processor family. The AMD64 ABI does not define a debug format. However, all systems that do implement DWARF shall use the following definitions.

DWARF is a specification developed for symbolic, source-level debugging. The debugging information format does not favor the design of any compiler or debugger. For more information on DWARF, see DWARF Debugging Information Format, revision: Version 2.0.0, July 27, 1993, UNIX International, Program Languages SIG.

DWARF Release Number

The DWARF definition requires some machine-specific definitions. The register number mapping needs to be specified for the AMD64 registers. In addition, the DWARF Version 2 specification requires processor-specific address class codes to be defined.

DWARF Register Number Mapping

Table ^3.19 outlines the register number mapping for the AMD64 processor family.^3.20

**Figure:** DWARF Register Number Mapping
$\begin{figure}\begin{center} \begin{tabular}{l\vert r\vert l} \multicolumn{1}{c}... ...mm0}}\xspace --{\texttt{\%mm7}}\xspace \\ \end{tabular}\end{center}\end{figure}$

Footnotes

... section ^3.18: This section is structured in a way similar to the PowerPC psABI
...tbl-reg-num-map ^3.19: The table defines Return Address to have a register number, even though the address is stored in 0(%rsp) and not in a physical register.
...^3.20: This document does not define mappings for privileged registers.

Jan Hubicka 2003-05-04