kumquat-buildroot/boot/arm-trusted-firmware/v2.4/0001-feat-build-add-support-for-new-binutils-versions.patch
Heiko Thiery 7b774048be boot/arm-trusted-firmware: fix build issue with binutils 2.39+
The new version of binutils introduces a new warning when linking. The
new warninng is enabled by default. To fix the issue this warning is
disabled by adding the patches to the arm-trusted-firmware package
v{2.2..2.8}. This is a backport of an upstream commit [1]

Since there are too many defconfigs that use the arm-trusted-firmware
package, it is not practical to create a global-patch-dir for all of them.
Therefore the patches are only in the package directory.

[1] 1f49db5f25

Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/4603996186
https://gitlab.com/buildroot.org/buildroot/-/jobs/4603996189

Cc: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Cc: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Reviewed-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Tested-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
[yann.morin.1998@free.fr: add proper Upstream: tags]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2023-07-10 23:39:18 +02:00

62 lines
2.4 KiB
Diff

From 0f75b03c008eacb9818af3a56dc088e72a623d17 Mon Sep 17 00:00:00 2001
From: Marco Felsch <m.felsch@pengutronix.de>
Date: Wed, 9 Nov 2022 12:59:09 +0100
Subject: [PATCH] feat(build): add support for new binutils versions
Users of GNU ld (BPF) from binutils 2.39+ will observe multiple instaces
of a new warning when linking the bl*.elf in the form:
ld.bfd: warning: stm32mp1_helper.o: missing .note.GNU-stack section implies executable stack
ld.bfd: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
ld.bfd: warning: bl2.elf has a LOAD segment with RWX permissions
ld.bfd: warning: bl32.elf has a LOAD segment with RWX permissions
These new warnings are enbaled by default to secure elf binaries:
- https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=ba951afb99912da01a6e8434126b8fac7aa75107
- https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=0d38576a34ec64a1b4500c9277a8e9d0f07e6774
Fix it in a similar way to what the Linux kernel does, see:
https://lore.kernel.org/all/20220810222442.2296651-1-ndesaulniers@google.com/
Following the reasoning there, we set "-z noexecstack" for all linkers
(although LLVM's LLD defaults to it) and optional add
--no-warn-rwx-segments since this a ld.bfd related.
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de>
Change-Id: I9430f5fa5036ca88da46cd3b945754d62616b617
Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Upstream: https://github.com/ARM-software/arm-trusted-firmware/commit/1f49db5f25cdd4e43825c9bcc0575070b80f628c
---
Makefile | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
index 1ddb7b844..470956b19 100644
--- a/Makefile
+++ b/Makefile
@@ -416,6 +416,8 @@ endif
GCC_V_OUTPUT := $(shell $(CC) -v 2>&1)
+TF_LDFLAGS += -z noexecstack
+
# LD = armlink
ifneq ($(findstring armlink,$(notdir $(LD))),)
TF_LDFLAGS += --diag_error=warning --lto_level=O1
@@ -442,7 +444,10 @@ TF_LDFLAGS += $(subst --,-Xlinker --,$(TF_LDFLAGS_$(ARCH)))
# LD = gcc-ld (ld) or llvm-ld (ld.lld) or other
else
-TF_LDFLAGS += --fatal-warnings -O1
+# With ld.bfd version 2.39 and newer new warnings are added. Skip those since we
+# are not loaded by a elf loader.
+TF_LDFLAGS += $(call ld_option, --no-warn-rwx-segments)
+TF_LDFLAGS += -O1
TF_LDFLAGS += --gc-sections
# ld.lld doesn't recognize the errata flags,
# therefore don't add those in that case
--
2.30.2