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i386: Drop -mpreferred-stack-boundary=4

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The flag was a left-over from when the -mpreferred-stack-boundary=2 flag
was removed in commit db290cf592.
This commit is contained in:
Florian Weimer 2018-05-22 14:44:14 +02:00
parent e28e9b1ec4
commit ed0d698870
3 changed files with 17 additions and 43 deletions
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16
ChangeLog
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@ -1,3 +1,19 @@
2018-05-22 Florian Weimer <fweimer@redhat.com>
* sysdeps/i386/Makefile [$(subdir) == math] (sysdep-CFLAGS): Do
not add -mpreferred-stack-boundary=4.
[$(subdir) == csu] (sysdep-CFLAGS): Likewise.
(stack-align-test-flags): Likewise.
[$(subdir) == stdlib] (CFLAGS-exit.c, CFLAGS-cxa_finalize.c):
Likewise.
[$(subdir) == elf] (CFLAGS-dl-init.c, CFLAGS-dl-fini.c)
(CFLAGS-dl-open.c, CFLAGS-dl-close.c, CFLAGS-dl-error.c): Likewise.
[$(subdir) == dlfcn] (CFLAGS-dlopen.c, CFLAGS-dlopenold.c)
(CFLAGS-dlclose.c, CFLAGS-dlerror.c): Likewise.
* sysdeps/i386/nptl/Makefile [$(subdir) == nptl]
(CFLAGS-pthread_create.c, CFLAGS-tst-align.c)
(CFLAGS-tst-align2.c): Likewise.
2018-05-21 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/x86/cpu-features.h (bit_arch_Prefer_FSRM): New.

38
sysdeps/i386/Makefile
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@ -19,46 +19,10 @@ CFLAGS-dl-load.c += -Wno-unused
CFLAGS-dl-reloc.c += -Wno-unused
endif
# Most of the glibc routines don't ever call user defined callbacks
# nor use any FPU or SSE* and as such don't need bigger %esp alignment
# than 4 bytes.
# Lots of routines in math will use FPU, so make math subdir an exception
# here.
# In gcc 4.6 (and maybe earlier?) giving -mpreferred-stack-boundary=2 is
# an error, so don't try to reduce it here like we used to. We still
# explicit set -mpreferred-stack-boundary=4 the places where it matters,
# in case an older compiler defaulted to 2.
ifeq ($(subdir),math)
sysdep-CFLAGS += -mpreferred-stack-boundary=4
else
ifeq ($(subdir),csu)
sysdep-CFLAGS += -mpreferred-stack-boundary=4
gen-as-const-headers += link-defines.sym
else
# Likewise, any function which calls user callbacks
uses-callbacks += -mpreferred-stack-boundary=4
# Likewise, any stack alignment tests
stack-align-test-flags += -malign-double -mpreferred-stack-boundary=4
endif
endif
# And a couple of other routines
ifeq ($(subdir),stdlib)
CFLAGS-exit.c += -mpreferred-stack-boundary=4
CFLAGS-cxa_finalize.c += -mpreferred-stack-boundary=4
endif
ifeq ($(subdir),elf)
CFLAGS-dl-init.c += -mpreferred-stack-boundary=4
CFLAGS-dl-fini.c += -mpreferred-stack-boundary=4
CFLAGS-dl-open.c += -mpreferred-stack-boundary=4
CFLAGS-dl-close.c += -mpreferred-stack-boundary=4
CFLAGS-dl-error.c += -mpreferred-stack-boundary=4
endif
ifeq ($(subdir),dlfcn)
CFLAGS-dlopen.c += -mpreferred-stack-boundary=4
CFLAGS-dlopenold.c += -mpreferred-stack-boundary=4
CFLAGS-dlclose.c += -mpreferred-stack-boundary=4
CFLAGS-dlerror.c += -mpreferred-stack-boundary=4
stack-align-test-flags += -malign-double
endif
ifneq (,$(filter -mno-tls-direct-seg-refs,$(CFLAGS)))

6
sysdeps/i386/nptl/Makefile
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@ -18,9 +18,3 @@
ifeq ($(subdir),csu)
gen-as-const-headers += tcb-offsets.sym
endif
ifeq ($(subdir),nptl)
CFLAGS-pthread_create.c += -mpreferred-stack-boundary=4
CFLAGS-tst-align.c += -mpreferred-stack-boundary=4
CFLAGS-tst-align2.c += -mpreferred-stack-boundary=4
endif