elf.h: Add aarch64 bti/pac dynamic tag constants

Constants double checked against binutils and the ELF for the Arm 64-bit
Architecture (AArch64) Release 2020Q2 document.

Only BTI PLT is used in glibc, there's no PAC PLT with glibc, and people
are expected to use BIND_NOW.

diff --git a/elf/elf.h b/elf/elf.h
index 197b557..ff9f1da 100644 (file)
--- a/elf/elf.h
+++ b/elf/elf.h
@@ -2875,6 +2875,8 @@ enum
 #define R_AARCH64_IRELATIVE    1032    /* STT_GNU_IFUNC relocation.  */
 
 /* AArch64 specific values for the Dyn d_tag field.  */
+#define DT_AARCH64_BTI_PLT     (DT_LOPROC + 1)
+#define DT_AARCH64_PAC_PLT     (DT_LOPROC + 3)
 #define DT_AARCH64_VARIANT_PCS (DT_LOPROC + 5)
 #define DT_AARCH64_NUM         6