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From a63f82f74e015eb662242cdb51ef814e3f576829 Mon Sep 17 00:00:00 2001
From: Jerome Forissier <jerome.forissier@linaro.org>
Date: Fri, 5 Aug 2022 09:48:03 +0200
Subject: [PATCH 4/4] core: link: add --no-warn-rwx-segments
Signed-off-by: Anton Antonov <Anton.Antonov@arm.com>
Upstream-Status: Backport [https://github.com/OP-TEE/optee_os/pull/5474]
binutils ld.bfd generates one RWX LOAD segment by merging several sections
with mixed R/W/X attributes (.text, .rodata, .data). After version 2.38 it
also warns by default when that happens [1], which breaks the build due to
--fatal-warnings. The RWX segment is not a problem for the TEE core, since
that information is not used to set memory permissions. Therefore, silence
the warning.
Link: [1] https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=ba951afb99912da01a6e8434126b8fac7aa75107
Link: https://sourceware.org/bugzilla/show_bug.cgi?id=29448
Reported-by: Dominique Martinet <dominique.martinet@atmark-techno.com>
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
---
core/arch/arm/kernel/link.mk | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/core/arch/arm/kernel/link.mk b/core/arch/arm/kernel/link.mk
index 49e9f4fa1..9e1cc172f 100644
--- a/core/arch/arm/kernel/link.mk
+++ b/core/arch/arm/kernel/link.mk
@@ -37,6 +37,7 @@ link-ldflags += --sort-section=alignment
link-ldflags += --fatal-warnings
link-ldflags += --gc-sections
link-ldflags += $(link-ldflags-common)
+link-ldflags += $(call ld-option,--no-warn-rwx-segments)
link-ldadd = $(LDADD)
link-ldadd += $(ldflags-external)
@@ -61,6 +62,7 @@ link-script-cppflags := \
$(cppflagscore))
ldargs-all_objs := -T $(link-script-dummy) --no-check-sections \
+ $(call ld-option,--no-warn-rwx-segments) \
$(link-ldflags-common) \
$(link-objs) $(link-ldadd) $(libgcccore)
cleanfiles += $(link-out-dir)/all_objs.o
@@ -75,7 +77,7 @@ $(link-out-dir)/unpaged_entries.txt: $(link-out-dir)/all_objs.o
$(AWK) '/ ____keep_pager/ { printf "-u%s ", $$3 }' > $@
unpaged-ldargs := -T $(link-script-dummy) --no-check-sections --gc-sections \
- $(link-ldflags-common)
+ $(link-ldflags-common) $(call ld-option,--no-warn-rwx-segments)
unpaged-ldadd := $(objs) $(link-ldadd) $(libgcccore)
cleanfiles += $(link-out-dir)/unpaged.o
$(link-out-dir)/unpaged.o: $(link-out-dir)/unpaged_entries.txt
@@ -104,7 +106,7 @@ $(link-out-dir)/init_entries.txt: $(link-out-dir)/all_objs.o
$(AWK) '/ ____keep_init/ { printf "-u%s ", $$3 }' > $@
init-ldargs := -T $(link-script-dummy) --no-check-sections --gc-sections \
- $(link-ldflags-common)
+ $(link-ldflags-common) $(call ld-option,--no-warn-rwx-segments)
init-ldadd := $(link-objs-init) $(link-out-dir)/version.o $(link-ldadd) \
$(libgcccore)
cleanfiles += $(link-out-dir)/init.o
--
2.43.2
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