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From: Michal Meloun <mmel@FreeBSD.org>
Date: Wed, 29 Apr 2020 14:06:42 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r360463 - head/libexec/rtld-elf
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Author: mmel
Date: Wed Apr 29 14:06:42 2020
New Revision: 360463
URL: https://svnweb.freebsd.org/changeset/base/360463

Log:
  Don't allow to use FPU inside of rtld library.
  Clang10 may use FPU instructions for optimizing operations with
  memory blocks. But we don't want to do lengthy save/restore of all
  FPU registers across each rtld_start() call.
  
  MFC after:	3 week

Modified:
  head/libexec/rtld-elf/Makefile

Modified: head/libexec/rtld-elf/Makefile
==============================================================================
--- head/libexec/rtld-elf/Makefile	Wed Apr 29 13:45:21 2020	(r360462)
+++ head/libexec/rtld-elf/Makefile	Wed Apr 29 14:06:42 2020	(r360463)
@@ -48,6 +48,9 @@ MLINKS?=	rtld.1 ld-elf.so.1.1 \
 		rtld.1 ld.so.1
 
 CFLAGS+=	-fpic -DPIC $(DEBUG)
+CFLAGS.armv6+=	-mfpu=none
+CFLAGS.armv7+=	-mfpu=none
+	
 LDFLAGS+=	-shared -Wl,-Bsymbolic -Wl,-z,defs -nostdlib -e ${RTLD_ENTRY}
 # Pull in the dependencies that we use from libc
 .include "rtld-libc/Makefile.inc"