From 3dda93b9a7988d358350991744ea9377409921b1 Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Mon, 18 Jan 2016 21:40:20 +0000
Subject: [PATCH] Restore ABI variants now that ldconfig groks -soft. In
 addition, as a transition mechanism, if we don't have /usr/libsoft, assume
 that soft float ABI binaries are the default, so treat them as default
 binaries. When we've fully transitioned, it will make no sense to do this
 stat, and it will be removed.

---
 libexec/rtld-elf/arm/reloc.c | 19 ++++++++++++++-----
 libexec/rtld-elf/paths.h     |  2 +-
 libexec/rtld-elf/rtld.c      |  2 +-
 3 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/libexec/rtld-elf/arm/reloc.c b/libexec/rtld-elf/arm/reloc.c
index 6bdda735e713..286e493ff87a 100644
--- a/libexec/rtld-elf/arm/reloc.c
+++ b/libexec/rtld-elf/arm/reloc.c
@@ -3,6 +3,7 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 #include <sys/param.h>
+#include <sys/stat.h>
 #include <sys/mman.h>
 
 #include <errno.h>
@@ -21,6 +22,7 @@ void
 arm_abi_variant_hook(Elf_Auxinfo **aux_info)
 {
 	Elf_Word ehdr;
+	struct stat sb;
 
 	/*
 	 * If we're running an old kernel that doesn't provide any data fail
@@ -37,13 +39,20 @@ arm_abi_variant_hook(Elf_Auxinfo **aux_info)
 	if ((ehdr & EF_ARM_VFP_FLOAT) != 0)
 		return;
 
+	/*
+	 * If there's no /usr/libsoft, then we don't have a system with both
+	 * hard and soft float. In that case, hope for the best and just
+	 * return. Such systems are required to have all soft or all hard
+	 * float ABI binaries and libraries. This is, at best, a transition
+	 * compatibility hack. Once we're fully hard-float, this should
+	 * be removed.
+	 */
+	if (stat("/usr/libsoft", &sb) != 0 || !S_ISDIR(sb.st_mode))
+		return;
+
 	/*
 	 * This is a soft float ABI binary. We need to use the soft float
-	 * settings. For the moment, the standard library path includes the hard
-	 * float paths as well. When upgrading, we need to execute the wrong
-	 * kind of binary until we've installed the new binaries. We could go
-	 * off whether or not /libsoft exists, but the simplicity of having it
-	 * in the path wins.
+	 * settings.
 	 */
 	ld_elf_hints_default = _PATH_SOFT_ELF_HINTS;
 	ld_path_libmap_conf = _PATH_SOFT_LIBMAP_CONF;
diff --git a/libexec/rtld-elf/paths.h b/libexec/rtld-elf/paths.h
index abfeb3f3ce1a..7d9d372c293c 100644
--- a/libexec/rtld-elf/paths.h
+++ b/libexec/rtld-elf/paths.h
@@ -62,7 +62,7 @@
 #define	_PATH_SOFT_ELF_HINTS	"/var/run/ld-elf-soft.so.hints"
 #define	_PATH_SOFT_LIBMAP_CONF	"/etc/libmap-soft.conf"
 #define	_PATH_SOFT_RTLD		"/libexec/ld-elf.so.1"
-#define	SOFT_STANDARD_LIBRARY_PATH "/libsoft:/usr/libsoft:/lib:/usr/lib"
+#define	SOFT_STANDARD_LIBRARY_PATH "/usr/libsoft"
 #define	LD_SOFT_		"LD_SOFT_"
 
 extern char *ld_elf_hints_default;
diff --git a/libexec/rtld-elf/rtld.c b/libexec/rtld-elf/rtld.c
index ad5d359452d4..66edc157d393 100644
--- a/libexec/rtld-elf/rtld.c
+++ b/libexec/rtld-elf/rtld.c
@@ -435,7 +435,7 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
 
     trust = !issetugid();
 
-/*  md_abi_variant_hook(aux_info); */
+    md_abi_variant_hook(aux_info);
 
     ld_bind_now = getenv(_LD("BIND_NOW"));
     /*