Support AT_HWCAP2 on FreeBSD.

include/ChangeLog:

	* elf/common.h (AT_FREEBSD_HWCAP2): Define.

gdb/ChangeLog:

	* fbsd-tdep.c (fbsd_print_auxv_entry): Handle AT_FREEBSD_HWCAP2.

gdb/ChangeLog

@@ -1,3 +1,7 @@
+2018-10-26  John Baldwin  <jhb@FreeBSD.org>
+
+	* fbsd-tdep.c (fbsd_print_auxv_entry): Handle AT_FREEBSD_HWCAP2.
+
 2018-10-26  Jim Wilson  <jimw@sifive.com>
 
 	* riscv-linux-tdep.c: Include tramp-frame.h and trad-frame.h.

gdb/fbsd-tdep.c

@@ -1521,6 +1521,7 @@ fbsd_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file,
       TAG (STACKPROT, _("Initial stack protection"), AUXV_FORMAT_HEX);
       TAG (EHDRFLAGS, _("ELF header e_flags"), AUXV_FORMAT_HEX);
       TAG (HWCAP, _("Machine-dependent CPU capability hints"), AUXV_FORMAT_HEX);
+      TAG (HWCAP2, _("Extension of AT_HWCAP"), AUXV_FORMAT_HEX);
     default:
       default_print_auxv_entry (gdbarch, file, type, val);
       return;

include/ChangeLog

@@ -1,3 +1,7 @@
+2018-10-26  John Baldwin  <jhb@FreeBSD.org>
+
+	* elf/common.h (AT_FREEBSD_HWCAP2): Define.
+
 2018-10-09  Sudakshina Das  <sudi.das@arm.com>
 
 	* opcode/aarch64.h (AARCH64_FEATURE_SSBS): New.

include/elf/common.h

@@ -1226,6 +1226,7 @@
 #define AT_FREEBSD_STACKPROT    23      /* Initial stack protection. */
 #define AT_FREEBSD_EHDRFLAGS    24      /* e_flags field from ELF header. */
 #define AT_FREEBSD_HWCAP        25      /* CPU feature flags. */
+#define AT_FREEBSD_HWCAP2       26      /* CPU feature flags 2. */
 
 #define AT_SUN_UID      2000    /* Effective user ID.  */
 #define AT_SUN_RUID     2001    /* Real user ID.  */