GNU-Style Section Compression
In addition to the compression format discussed previously, the Oracle Solaris
link-editor understands an alternative format used by the GNU tool chain.
This format does not employ a section flag to indicate compression. Instead, a section name
that starts with the .zdebug
prefix identifies a section containing
compressed data. GNU-style compressed sections start with the following
compression header structure.
typedef struct { uchar_t gch_magic[4]; uchar_t gch_size[8]; } Chdr_GNU;
-
gch_magic
-
A 4-byte magic number identifying the compression algorithm. At this time, only ZLIB compression is supported. The values of
gch_magic
for ZLIB compression is as listed in Table 14-11. -
gch_size
-
The size in bytes of the uncompressed data, encoded as a 64-bit
ELFDATA2MSB
big endian integer value.
Table 14-11
GNU
ZLIB Compression, gch_magic
Name | Value |
---|---|
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