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ld.so: Add architecture specific fields

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To support Intel Control-flow Enforcement Technology (CET) run-time
control:

1. An architecture specific field in the writable ld.so namespace is
needed to indicate if CET features are enabled at run-time.
2. An architecture specific field in struct link_map is needed if
CET features are enabled in an ELF module.

This patch adds dl-procruntime.c to the writable ld.so namespace and
link_map.h to struct link_map.

Tested with build-many-glibcs.py.

	* elf/dl-support.c: Include <dl-procruntime.c>.
	* include/link.h: Include <link_map.h>.
	* sysdeps/generic/dl-procruntime.c: New file.
	* sysdeps/generic/link_map.h: Likewise.
	* sysdeps/generic/ldsodefs.h: Include <dl-procruntime.c> in
	the writable ld.so namespace.
This commit is contained in:
H.J. Lu
2017-11-13 08:02:39 -08:00
parent e69897bf20
commit 4a306ef1c8
6 changed files with 21 additions and 4 deletions
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1
elf/dl-support.c
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@ -126,6 +126,7 @@ int _dl_starting_up = 1;
void *_dl_random;
/* Get architecture specific initializer. */
#include <dl-procruntime.c>
#include <dl-procinfo.c>
/* Initial value of the CPU clock. */