mirror of
https://github.com/ibm-s390-linux/s390-tools.git
synced 2026-08-05 02:14:52 +00:00
9e62005818
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>
99 lines
2.6 KiB
Makefile
99 lines
2.6 KiB
Makefile
# Common definitions
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include ../../common.mak
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ZIPL_DIR := $(rootdir)/zipl
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ZIPL_BOOT_DIR := $(ZIPL_DIR)/boot
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INCLUDE_PATHS := $(ZIPL_BOOT_DIR) $(ZIPL_DIR)/include $(rootdir)/include
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INCLUDE_PARMS := $(addprefix -I,$(INCLUDE_PATHS))
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ALL_CFLAGS := $(NO_PIE_CFLAGS) -Os -g \
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$(INCLUDE_PARMS) \
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-DENABLE_SCLP_ASCII=1 \
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-DS390_TOOLS_RELEASE=$(S390_TOOLS_RELEASE) \
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-fno-builtin -ffreestanding -fno-asynchronous-unwind-tables \
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-fno-delete-null-pointer-checks -fno-stack-protector \
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-fexec-charset=IBM1047 -m64 -mpacked-stack \
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-mstack-size=4096 -mstack-guard=128 -msoft-float \
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-Wall -Wformat-security -Wextra -Werror \
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-Wno-array-bounds
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FILES := stage3a.bin stage3b.bin stage3b_reloc.bin
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ZIPL_SRCS_C := libc.c ebcdic.c ebcdic_conv.c sclp.c
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ZIPL_SRCS_ASM := entry.S
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ZIPL_OBJS_C := $(ZIPL_SRCS_C:%.c=%.o)
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ZIPL_OBJS_ASM := $(ZIPL_SRCS_ASM:%.S=%.o)
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ZIPL_OBJS := $(ZIPL_OBJS_C) $(ZIPL_OBJS_ASM)
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all: $(FILES)
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# Prevent make from using some default rules...
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%: %.S
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%.o: %.S Makefile
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$(CC) $(ALL_CFLAGS) -c -o $@ $<
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%.o: %.c Makefile
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$(CC) $(ALL_CFLAGS) -c -o $@ $<
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# Dependencies for the .lds generation
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sources_lds_S = $(wildcard *.lds.S)
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dependencies_lds_S = $(sources_lds_S:%.lds.S=.%.lds.d)
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# Include all ".lds.d" dependency files for all make targets except for "clean"
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ifneq ($(MAKECMDGOALS),clean)
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-include $(dependencies_lds_S)
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endif
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%.lds: %.lds.S Makefile
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$(CPP) -Wp,-MD,.$@.d,-MT,$@ $(INCLUDE_PARMS) -P -C -o $@ $<
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# Special rules for zipl object files
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$(ZIPL_OBJS_C): %.o : $(ZIPL_BOOT_DIR)/%.c
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$(CC) $(ALL_CFLAGS) -c -o $@ $<
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$(ZIPL_OBJS_ASM): %.o : $(ZIPL_BOOT_DIR)/%.S
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$(CC) $(ALL_CFLAGS) -c -o $@ $<
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dependencies_zipl_c := $(ZIPL_SRCS_C:%.c=.%.o.d)
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$(dependencies_zipl_c): .%.o.d : $(ZIPL_BOOT_DIR)/%.c
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$(CC_SILENT) -MM $(ALL_CPPFLAGS) $(ALL_CFLAGS) $< > $@
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ifneq ($(MAKECMDGOALS),clean)
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-include $(dependencies_zipl_c)
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endif
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stage3b_reloc.o: stage3b.bin
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stage3a.elf: head.o stage3a_init.o stage3a.o stage3a.lds $(ZIPL_OBJS)
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stage3b.elf: head.o stage3b.o stage3b.lds $(ZIPL_OBJS)
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stage3b_reloc.elf:
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%.elf: %.o
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case $* in \
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stage3a) SFLAGS="$(NO_PIE_LDFLAGS) -nostdlib -Wl,-T,stage3a.lds";; \
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stage3b) SFLAGS="$(NO_PIE_LDFLAGS) -nostdlib -Wl,-T,stage3b.lds";; \
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stage3b_reloc) SFLAGS="$(NO_PIE_LDFLAGS) -nostdlib -Wl,-estage3b_reloc_start,-Ttext,0";; \
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esac; \
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$(LINK) $$SFLAGS -m64 $(filter %.o, $^) -o $@
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@chmod a-x $@
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%.bin: %.elf
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$(OBJCOPY) -O binary \
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--only-section=.text* \
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--only-section=.ex_table* \
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--only-section=.fixup* \
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--only-section=.data* \
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--only-section=.rodata* \
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$< $@
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@chmod a-x $@
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clean:
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rm -f *.o *.elf *.bin *.map .*.d *.lds
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.PHONY: all clean
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