arm64: Add a comment about HWCAP values

They must be identical to Linux. Document this requirement to allow
userspace to depend on this.

Sponsored by:	Arm Ltd

This commit is contained in:

Andrew Turner

2026-05-14 16:04:32 +01:00

parent 4f876cec30

commit 48da01ad0b

1 changed files with 6 additions and 0 deletions

									
										sys/arm64/include/elf.h
									
		+6
		
												View File
												
				@@ -96,6 +96,12 @@ __ElfType(Auxinfo);

				/* First __FreeBSD_version that supports Top Byte Ignore (TBI) */

				#define	TBI_VERSION	1500058

				/*

				 * The HWCAP values must be identical to Linux. Many userspace programs

				 * will define missing HWCAP values to the Linux version. To keep these

				 * working when we add the HWCAP it must be the same.

				 */

				/* HWCAP */

				#define	HWCAP_FP		(1 << 0)

				#define	HWCAP_ASIMD		(1 << 1)