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x86: Move CET control to _dl_x86_feature_control [BZ #25887]

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1. Include <dl-procruntime.c> to get architecture specific initializer in
rtld_global.
2. Change _dl_x86_feature_1[2] to _dl_x86_feature_1.
3. Add _dl_x86_feature_control after _dl_x86_feature_1, which is a
struct of 2 bitfields for IBT and SHSTK control

This fixes [BZ #25887].
This commit is contained in:
H.J. Lu
2020-04-28 10:05:25 -07:00
parent cbfc16122e
commit 674ea88294
9 changed files with 81 additions and 68 deletions
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2
elf/rtld.c
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@ -315,6 +315,8 @@ rtld_hidden_def (_dl_starting_up)
(except those which cannot be added for some reason). */
struct rtld_global _rtld_global =
{
/* Get architecture specific initializer. */
#include <dl-procruntime.c>
/* Generally the default presumption without further information is an
* executable stack but this is not true for all platforms. */
._dl_stack_flags = DEFAULT_STACK_PERMS,