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Peter Smith b65ead9186 [AArch64][ELF][llvm-readobj] Add support for BTI and PAC dynamic tags
ELF for the 64-bit Arm Architecture defines two processor-specific dynamic
tags:
DT_AARCH64_BTI_PLT 0x70000001, d_val
DT_AARCH64_PAC_PLT 0x70000003, d_val

These presence of these tags indicate that PLT sequences have been
protected using Branch Target Identification and Pointer Authentication
respectively. The presence of both indicates that the PLT sequences have
been protected with both Branch Target Identification and Pointer
Authentication.

This patch adds the tags and tests for llvm-readobj and yaml2obj.

As some of the processor specific dynamic tags overlap, this patch splits
them up, keeping their original default value if they were not previously
mentioned explicitly in a switch case.

Differential Revision: https://reviews.llvm.org/D62596

llvm-svn: 362493
2019-06-04 11:44:33 +00:00
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