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Diffstat (limited to 'gdb/doc/gdbint.texinfo')
| -rw-r--r-- | gdb/doc/gdbint.texinfo | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gdb/doc/gdbint.texinfo b/gdb/doc/gdbint.texinfo index 38e9b43..d578347 100644 --- a/gdb/doc/gdbint.texinfo +++ b/gdb/doc/gdbint.texinfo @@ -2201,6 +2201,29 @@ DWARF 2 is an improved but incompatible version of DWARF 1. The DWARF 2 reader is in @file{dwarf2read.c}. +@subsection Compressed DWARF 2 + +@cindex Compressed DWARF 2 debugging info +Compressed DWARF 2 is not technically a separate debugging format, but +merely DWARF 2 debug information that has been compressed. In this +format, every object-file section holding DWARF 2 debugging +information is compressed and prepended with a header. (The section +is also typically renamed, so a section called @code{.debug_info} in a +DWARF 2 binary would be called @code{.zdebug_info} in a compressed +DWARF 2 binary.) The header is 12 bytes long: + +@itemize @bullet +@item +4 bytes: the literal string ``ZLIB'' +@item +8 bytes: the uncompressed size of the section, in big-endian byte +order. +@end itemize + +The same reader is used for both compressed an normal DWARF 2 info. +Section decompression is done in @code{zlib_decompress_section} in +@file{dwarf2read.c}. + @subsection SOM @cindex SOM debugging info |