File s390-tools-sles15sp4-genprotimg-boot-disable-Warray-bounds-for-now.patch of Package s390-tools.25308
From 9e620058184cfdf026241b953bfbb095256198a0 Mon Sep 17 00:00:00 2001
From: Marc Hartmayer <mhartmay@linux.ibm.com>
Date: Tue, 26 Apr 2022 09:22:10 +0000
Subject: [PATCH] genprotimg/boot: disable `-Warray-bounds` for now
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This work around fixes the gcc-12 false positive by disabling `Warray-bounds`:
CC genprotimg/boot/stage3a.o
In file included from stage3a.c:14:
In function ‘__test_facility’,
inlined from ‘test_facility’ at ../../include/boot/s390.h:428:9,
inlined from ‘start’ at stage3a.c:42:7:
../../include/boot/s390.h:418:17: error: array subscript 0 is outside array bounds of ‘void[0]’ [-Werror=array-bounds]
418 | return (*ptr & (0x80 >> (nr & 7))) != 0;
| ^~~~
Unfortunately, there is currently no better fix available that doesn't result
in larger boot loader code sizes. Given the importancy of the boot loader file
sizes the other fixes aren't acceptable. The Linux kernel shares the
problem (but for performance reasons), take a look at the discussion
https://lore.kernel.org/lkml/yt9dzgkelelc.fsf@linux.ibm.com/ for details.
Fixes: https://github.com/ibm-s390-linux/s390-tools/issues/130
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
---
genprotimg/boot/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/genprotimg/boot/Makefile b/genprotimg/boot/Makefile
index f957a70..95bd6cc 100644
--- a/genprotimg/boot/Makefile
+++ b/genprotimg/boot/Makefile
@@ -15,7 +15,8 @@ ALL_CFLAGS := $(NO_PIE_CFLAGS) -Os -g \
-fno-delete-null-pointer-checks -fno-stack-protector \
-fexec-charset=IBM1047 -m64 -mpacked-stack \
-mstack-size=4096 -mstack-guard=128 -msoft-float \
- -Wall -Wformat-security -Wextra -Werror
+ -Wall -Wformat-security -Wextra -Werror \
+ -Wno-array-bounds
FILES := stage3a.bin stage3b.bin stage3b_reloc.bin
--
2.35.3
