kc3-lang/libffi/src/aarch64

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  • Hash : 5ceddf40
    Author : Bill Roberts
    Date : 2025-02-20T04:25:21 

    aarch64: add PAC to GNU Notes (#882)

While PAC was enabled, the bit to indicate support in the GNU Notes
section of the ELF was missing.

Before:
readelf -n ./aarch64-unknown-linux-gnu/.libs/libffi.so

Displaying notes found in: .note.gnu.property
  Owner                Data size 	Description
  GNU                  0x00000010	NT_GNU_PROPERTY_TYPE_0
      Properties: AArch64 feature: BTI

This was caused by this file not having PAC indicated in GNU Notes and
the linker discarding it:
File: ./aarch64-unknown-linux-gnu/src/aarch64/sysv.o

Displaying notes found in: .note.gnu.property
  Owner                Data size        Description
  GNU                  0x00000010       NT_GNU_PROPERTY_TYPE_0
      Properties: AArch64 feature: BTI

Now it has it:
File: ./aarch64-unknown-linux-gnu/src/aarch64/sysv.o

Displaying notes found in: .note.gnu.property
  Owner                Data size        Description
  GNU                  0x00000010       NT_GNU_PROPERTY_TYPE_0
      Properties: AArch64 feature: BTI, PAC

As well as the output shared object:
readelf -n ./aarch64-unknown-linux-gnu/.libs/libffi.so

Displaying notes found in: .note.gnu.property
  Owner                Data size 	Description
  GNU                  0x00000010	NT_GNU_PROPERTY_TYPE_0
      Properties: AArch64 feature: BTI, PAC

Fixes: #881

Signed-off-by: Bill Roberts <bill.roberts@arm.com>

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