Commit 6aa56115 authored Jan 12, 2023 by Peter Foley Committed by Richard Weinberger Feb 13, 2023

um: Use CFLAGS_vmlinux



link-vmlinux.sh doesn't use LDFLAGS_vmlinux when linking the kernel for
UML. Move the LDFLAGS_EXESTACK options into CFLAGS_vmlinux so they're
actually respected.

e.g.
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: warning: .tmp_vmlinux.kallsyms3.o: missing .note.GNU-stack section implies executable stack
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: warning: vmlinux has a LOAD segment with RWX permissions

Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Peter Foley <pefoley2@pefoley.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

parent 910dba41

arch/um/Makefile

+1 −2

Original line number	Diff line number	Diff line
		@@ -141,11 +141,10 @@ ifeq ($(CONFIG_LD_IS_BFD),y)
		LDFLAGS_EXECSTACK += $(call ld-option,--no-warn-rwx-segments)
		endif

		LD_FLAGS_CMDLINE = $(foreach opt,$(KBUILD_LDFLAGS),-Wl,$(opt))
		LD_FLAGS_CMDLINE = $(foreach opt,$(KBUILD_LDFLAGS) $(LDFLAGS_EXECSTACK),-Wl,$(opt))

		# Used by link-vmlinux.sh which has special support for um link
		export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
		export LDFLAGS_vmlinux := $(LDFLAGS_EXECSTACK)

		# When cleaning we don't include .config, so we don't include
		# TT or skas makefiles and don't clean skas_ptregs.h.