Linux 6.3 adds constants AT_RSEQ_FEATURE_SIZE and AT_RSEQ_ALIGN; add
them to glibc's elf.h. (Recall that, although elf.h is a
system-independent header, so far we've put AT_* constants there even
if Linux-specific, as discussed in bug 15794. So rather than making
any attempt to fix that issue, the new constants are just added there
alongside the existing ones.)
Tested for x86_64.
#define AT_HWCAP2 26 /* More machine-dependent hints about
processor capabilities. */
+#define AT_RSEQ_FEATURE_SIZE 27 /* rseq supported feature size. */
+#define AT_RSEQ_ALIGN 28 /* rseq allocation alignment. */
+
#define AT_EXECFN 31 /* Filename of executable. */
/* Pointer to the global system page used for system calls and other