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gold: Add put_ch_reserved to 64-bit Chdr_write

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The 64-bit ELF compression header has a reserved field.  It should be
cleared to avoid random bits in it.

elfcpp/

	PR gold/21857
	* elfcpp.h (Chdr_write): Add put_ch_reserved.
	(Chdr_write<64, true>::put_ch_reserved): New.
	(Chdr_write<64, false>::put_ch_reserved): Likewise.

gold/

	PR gold/21857
	* compressed_output.cc (Output_compressed_section::set_final_data_size):
	Call put_ch_reserved to clear the reserved field for 64-bit ELF.
This commit is contained in:
H.J. Lu
2017-07-28 13:39:42 -07:00
parent 894dde0ba7
commit 49ba15a23a
4 changed files with 34 additions and 0 deletions
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4
gold/compressed_output.cc
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@@ -286,6 +286,8 @@ Output_compressed_section::set_final_data_size()
chdr.put_ch_type(elfcpp::ELFCOMPRESS_ZLIB);
chdr.put_ch_size(uncompressed_size);
chdr.put_ch_addralign(addralign);
// Clear the reserved field.
chdr.put_ch_reserved(0);
}
else
{
@@ -293,6 +295,8 @@ Output_compressed_section::set_final_data_size()
chdr.put_ch_type(elfcpp::ELFCOMPRESS_ZLIB);
chdr.put_ch_size(uncompressed_size);
chdr.put_ch_addralign(addralign);
// Clear the reserved field.
chdr.put_ch_reserved(0);
}
}
else