Comments
Patch
@@ -50,6 +50,19 @@ CFLAGS-dl-runtime.c = -fexceptions -fasynchronous-unwind-tables
CFLAGS-dl-lookup.c = -fexceptions -fasynchronous-unwind-tables
CFLAGS-dl-iterate-phdr.c = $(uses-callbacks)
+# Compile rtld itself without stack protection.
+# Also compile all routines in the static library that are elided from
+# the shared libc because they are in ld.so the same way.
+
+define elide-stack-protector
+$(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-stack-protector))
+endef
+
+CFLAGS-.o += $(call elide-stack-protector,.o,$(elide-routines.os))
+CFLAGS-.op += $(call elide-stack-protector,.op,$(elide-routines.os))
+CFLAGS-.og += $(call elide-stack-protector,.og,$(elide-routines.os))
+CFLAGS-.os += $(call elide-stack-protector,.os,$(all-rtld-routines))
+
ifeq ($(unwind-find-fde),yes)
routines += unwind-dw2-fde-glibc
shared-only-routines += unwind-dw2-fde-glibc
@@ -144,4 +144,6 @@ cpp-srcs-left := $(rtld-modules:%.os=%)
lib := rtld
include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
+rtld-CFLAGS := $(no-stack-protector)
+
endif
From: Nick Alcock <nick.alcock@oracle.com> Also compile corresponding routines in the static libc.a with the same flag. v3: Use $(no-stack-protector). Introduce $(elide-stack-protector) and use it to reduce redundancy. Bring all the elisions together textually. * elf/Makefile (elide-stack-protector): New. (CFLAGS-.os): Use it, eliding $(all-rtld-routines). (CFLAGS-.oX): Likewise, eliding $(elide-routines.os). (rtld-CFLAGS): Likewise. --- elf/Makefile | 13 +++++++++++++ elf/rtld-Rules | 2 ++ 2 files changed, 15 insertions(+)