Exclude routines from fortification

Since the _FORTIFY_SOURCE feature uses some routines of Glibc, they need to
be excluded from the fortification.

On top of that:
 - some tests explicitly verify that some level of fortification works
   appropriately, we therefore shouldn't modify the level set for them.
 - some objects need to be build with optimization disabled, which
   prevents _FORTIFY_SOURCE to be used for them.

Assembler files that implement architecture specific versions of the
fortified routines were not excluded from _FORTIFY_SOURCE as there is no
C header included that would impact their behavior.

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

2 files changed, 94 insertions, 16 deletions

diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/Makefile b/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
index 42cca25a09..34273a5f58 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
@@ -88,13 +88,19 @@ tests-internal += test-wprintf-ieee128 test-wprintf-ibm128
 CFLAGS-test-wprintf-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
 CFLAGS-test-wprintf-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
 
+# The following tests are setting _FORTIFY_SOURCE internally
 tests-internal += test-obstack-ieee128 test-obstack-ibm128
-CFLAGS-test-obstack-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
-CFLAGS-test-obstack-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+CFLAGS-test-obstack-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi \
+				 $(no-fortify-source)
+CFLAGS-test-obstack-ibm128.c += -mabi=ibmlongdouble -Wno-psabi \
+				$(no-fortify-source)
 
+# The following tests are setting _FORTIFY_SOURCE internally
 tests-internal += test-obstack-chk-ieee128 test-obstack-chk-ibm128
-CFLAGS-test-obstack-chk-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
-CFLAGS-test-obstack-chk-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+CFLAGS-test-obstack-chk-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi \
+				     $(no-fortify-source)
+CFLAGS-test-obstack-chk-ibm128.c += -mabi=ibmlongdouble -Wno-psabi \
+				    $(no-fortify-source)
 
 tests-internal += test-scanf-ieee128 test-scanf-ibm128
 CFLAGS-test-scanf-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi -std=c89 -D_GNU_SOURCE
@@ -216,25 +222,37 @@ ldbl-extra-routines += asprintf_chk \
 		       obstack_chk \
 		       vobstack_chk
 
+# The following tests are setting _FORTIFY_SOURCE internally
 tests-internal += test-printf-chk-ieee128 test-printf-chk-ibm128
-CFLAGS-test-printf-chk-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
-CFLAGS-test-printf-chk-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+CFLAGS-test-printf-chk-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi \
+				    $(no-fortify-source)
+CFLAGS-test-printf-chk-ibm128.c += -mabi=ibmlongdouble -Wno-psabi \
+				   $(no-fortify-source)
 
+# The following tests are setting _FORTIFY_SOURCE internally
 tests-internal += test-printf-chk-redir-ieee128 test-printf-chk-redir-ibm128
 CFLAGS-test-printf-chk-redir-ieee128.c += -mfloat128 -mabi=ieeelongdouble \
-					  -Wno-psabi -Wno-unused-result
+					  -Wno-psabi -Wno-unused-result \
+					  $(no-fortify-source)
 CFLAGS-test-printf-chk-redir-ibm128.c += -mabi=ibmlongdouble -Wno-psabi \
-					 -Wno-unused-result
+					 -Wno-unused-result \
+					 $(no-fortify-source)
 
+# The following tests are setting _FORTIFY_SOURCE internally
 tests-internal += test-wprintf-chk-ieee128 test-wprintf-chk-ibm128
-CFLAGS-test-wprintf-chk-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
-CFLAGS-test-wprintf-chk-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+CFLAGS-test-wprintf-chk-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi \
+				     $(no-fortify-source)
+CFLAGS-test-wprintf-chk-ibm128.c += -mabi=ibmlongdouble -Wno-psabi \
+				    $(no-fortify-source)
 
+# The following tests are setting _FORTIFY_SOURCE internally
 tests-internal += test-wprintf-chk-redir-ieee128 test-wprintf-chk-redir-ibm128
 CFLAGS-test-wprintf-chk-redir-ieee128.c += -mfloat128 -mabi=ieeelongdouble \
-					   -Wno-psabi -Wno-unused-result
+					   -Wno-psabi -Wno-unused-result \
+					   $(no-fortify-source)
 CFLAGS-test-wprintf-chk-redir-ibm128.c += -mabi=ibmlongdouble -Wno-psabi \
-					  -Wno-unused-result
+					  -Wno-unused-result \
+					  $(no-fortify-source)
 endif
 
 ifeq ($(subdir),argp)
@@ -281,13 +299,19 @@ CFLAGS-tst-ieee128-error.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
 CFLAGS-tst-ieee128-efgcvt.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
 CFLAGS-tst-ieee128-errorfptr.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
 
+# The following tests are setting _FORTIFY_SOURCE internally
 tests-container += test-syslog-ieee128 test-syslog-ibm128
-CFLAGS-test-syslog-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
-CFLAGS-test-syslog-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+CFLAGS-test-syslog-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi \
+				$(no-fortify-source)
+CFLAGS-test-syslog-ibm128.c += -mabi=ibmlongdouble -Wno-psabi \
+			       $(no-fortify-source)
 
+# The following tests are setting _FORTIFY_SOURCE internally
 tests-container += test-syslog-chk-ieee128 test-syslog-chk-ibm128
-CFLAGS-test-syslog-chk-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
-CFLAGS-test-syslog-chk-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+CFLAGS-test-syslog-chk-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi \
+				    $(no-fortify-source)
+CFLAGS-test-syslog-chk-ibm128.c += -mabi=ibmlongdouble -Wno-psabi \
+				   $(no-fortify-source)
 endif
 
 ifeq ($(subdir),stdlib)
@@ -395,6 +419,31 @@ endif
 # Add IEEE binary128 files as make targets.
 routines += $(foreach r,$(ldbl-extra-routines),ieee128-$(r))
 
+routines_no_fortify += \
+  ieee128-asprintf \
+  ieee128-dprintf \
+  ieee128-fprintf \
+  ieee128-fwprintf \
+  ieee128-obstack \
+  ieee128-printf \
+  ieee128-snprintf \
+  ieee128-sprintf \
+  ieee128-swprintf \
+  ieee128-syslog \
+  ieee128-vasprintf \
+  ieee128-vdprintf \
+  ieee128-vfprintf \
+  ieee128-vfwprintf \
+  ieee128-vobstack \
+  ieee128-vprintf \
+  ieee128-vsnprintf \
+  ieee128-vsprintf \
+  ieee128-vswprintf \
+  ieee128-vsyslog \
+  ieee128-vwprintf \
+  ieee128-wprintf \
+  # routines_no_fortify
+
 # On powerpc64le, the routines responsible for converting between long
 # double and string (e.g.: printf, scanf, strtold, strfroml) default to
 # IBM long double mode.  When support for TS 18661-3 was added, several
diff --git a/sysdeps/ieee754/ldbl-opt/Makefile b/sysdeps/ieee754/ldbl-opt/Makefile
index 22e778ad0e..0ed1cd2cae 100644
--- a/sysdeps/ieee754/ldbl-opt/Makefile
+++ b/sysdeps/ieee754/ldbl-opt/Makefile
@@ -269,3 +269,32 @@ CFLAGS-tst-nldbl-wscanf-binary-gnu89.c += -mlong-double-64 -std=gnu89 \
 					  -DOBJPFX=\"$(objpfx)\"
 
 endif
+
+routines_no_fortify += \
+  nldbl-asprintf \
+  nldbl-dprintf \
+  nldbl-fprintf \
+  nldbl-fwprintf \
+  nldbl-obstack_printf \
+  nldbl-obstack_vprintf \
+  nldbl-printf \
+  nldbl-snprintf \
+  nldbl-sprintf \
+  nldbl-swprintf \
+  nldbl-syslog \
+  nldbl-vasprintf \
+  nldbl-vdprintf \
+  nldbl-vfprintf \
+  nldbl-vfwprintf \
+  nldbl-vprintf \
+  nldbl-vsnprintf \
+  nldbl-vsprintf \
+  nldbl-vswprintf \
+  nldbl-vsyslog \
+  nldbl-vwprintf \
+  nldbl-wprintf \
+  # routines_no_fortify
+
+# We can't rely on Makeconfig here for whatever reason
+CFLAGS-.oS += $(call elide-fortify-source,.oS,$(routines_no_fortify))
+CFLAGS-.oS += $(call elide-fortify-source,_chk.oS,$(routines_no_fortify))