GNU C Library master sources branch master updated. glibc-2.23-569-gd957c4d

[hjl at sourceware dot org]

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=d957c4d3fa48d685ff2726c605c988127ef99395

commit d957c4d3fa48d685ff2726c605c988127ef99395
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Mon Jul 18 15:16:11 2016 -0700

    i386: Compile rtld-*.os with -mno-sse -mno-mmx -mfpmath=387
    
    Compile i386 rtld-*.os with -mno-sse -mno-mmx -mfpmath=387 so that no
    code in ld.so uses mm/xmm/ymm/zmm registers on i386 since the first 3
    mm/xmm/ymm/zmm registers are used to pass vector parameters which must
    be preserved.
    
    	* sysdeps/i386/Makefile (rtld-CFLAGS): New.
    	[subdir == elf] (CFLAGS-.os): Replace -mno-sse -mno-mmx
    	-mfpmath=387 with $(rtld-CFLAGS).
    	[subdir != elf] (CFLAGS-.os): Compile rtld-*.os with
    	$(rtld-CFLAGS).

diff --git a/ChangeLog b/ChangeLog
index 855032f..b587b40 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2016-07-18  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* sysdeps/i386/Makefile (rtld-CFLAGS): New.
+	[subdir == elf] (CFLAGS-.os): Replace -mno-sse -mno-mmx
+	-mfpmath=387 with $(rtld-CFLAGS).
+	[subdir != elf] (CFLAGS-.os): Compile rtld-*.os with
+	$(rtld-CFLAGS).
+
 2016-07-18   Ross Burton  <ross.burton@intel.com>
 	     Khem Raj  <raj.khem@gmail.com>
 
diff --git a/sysdeps/i386/Makefile b/sysdeps/i386/Makefile
index 6c91842..e94f2cb 100644
--- a/sysdeps/i386/Makefile
+++ b/sysdeps/i386/Makefile
@@ -84,17 +84,20 @@ ifeq ($(subdir),csu)
 gen-as-const-headers += tlsdesc.sym
 endif
 
-ifeq ($(subdir),elf)
 # Make sure no code in ld.so uses mm/xmm/ymm/zmm registers on i386 since
 # the first 3 mm/xmm/ymm/zmm registers are used to pass vector parameters
 # which must be preserved.
 # With SSE disabled, ensure -fpmath is not set to use sse either.
+rtld-CFLAGS = -mno-sse -mno-mmx -mfpmath=387
+ifeq ($(subdir),elf)
 CFLAGS-.os += $(if $(filter $(@F),$(patsubst %,%.os,$(all-rtld-routines))),\
-		   -mno-sse -mno-mmx -mfpmath=387)
+		   $(rtld-CFLAGS))
 
 tests-special += $(objpfx)tst-ld-sse-use.out
 $(objpfx)tst-ld-sse-use.out: ../sysdeps/i386/tst-ld-sse-use.sh $(objpfx)ld.so
 	@echo "Checking ld.so for SSE register use.  This will take a few seconds..."
 	$(BASH) $< $(objpfx) '$(NM)' '$(OBJDUMP)' '$(READELF)' > $@; \
 	$(evaluate-test)
+else
+CFLAGS-.os += $(if $(filter rtld-%.os,$(@F)), $(rtld-CFLAGS))
 endif

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog             |    8 ++++++++
 sysdeps/i386/Makefile |    7 +++++--
 2 files changed, 13 insertions(+), 2 deletions(-)


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