236d15222e
Avoids the following bogus warning:
pvh_main.c: In function ‘pvh_load_kernel’:
pvh_main.c:101:42: warning: array subscript 0 is outside array bounds of ‘uint16_t[0]’ {aka ‘short unsigned int[]’} [-Warray-bounds]
101 | uint32_t ebda_paddr = ((uint32_t)*((uint16_t *)EBDA_BASE_ADDR)) << 4;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Cc: qemu-stable@nongnu.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
76 lines
2.4 KiB
Makefile
76 lines
2.4 KiB
Makefile
include config.mak
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SRC_DIR := $(TOPSRC_DIR)/pc-bios/optionrom
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VPATH = $(SRC_DIR)
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all: multiboot.bin multiboot_dma.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin
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# Dummy command so that make thinks it has done something
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@true
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include ../../config-host.mak
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CFLAGS = -O2 -g
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quiet-command = $(if $(V),$1,$(if $(2),@printf " %-7s %s\n" $2 $3 && $1, @$1))
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cc-option = $(if $(shell $(CC) $1 -c -o /dev/null -xc /dev/null >/dev/null 2>&1 && echo OK), $1, $2)
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override CFLAGS += -march=i486 -Wall
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# If -fcf-protection is enabled in flags or compiler defaults that will
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# conflict with -march=i486
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override CFLAGS += $(call cc-option, -fcf-protection=none)
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# Flags for dependency generation
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override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
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override CFLAGS += $(filter -W%, $(QEMU_CFLAGS))
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override CFLAGS += $(call cc-option, -fno-pie)
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override CFLAGS += -ffreestanding -I$(TOPSRC_DIR)/include
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override CFLAGS += $(call cc-option, -fno-stack-protector)
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override CFLAGS += $(call cc-option, -m16)
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override CFLAGS += $(call cc-option, -Wno-array-bounds)
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ifeq ($(filter -m16, $(CFLAGS)),)
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# Attempt to work around compilers that lack -m16 (GCC <= 4.8, clang <= ??)
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# On GCC we add -fno-toplevel-reorder to keep the order of asm blocks with
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# respect to the rest of the code. clang does not have -fno-toplevel-reorder,
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# but it places all asm blocks at the beginning and we're relying on it for
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# the option ROM header. So just force clang not to use the integrated
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# assembler, which doesn't support .code16gcc.
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override CFLAGS += $(call cc-option, -fno-toplevel-reorder)
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override CFLAGS += $(call cc-option, -no-integrated-as)
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override CFLAGS += -m32 -include $(SRC_DIR)/code16gcc.h
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endif
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Wa = -Wa,
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override ASFLAGS += -32
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override CFLAGS += $(call cc-option, $(Wa)-32)
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LD_I386_EMULATION ?= elf_i386
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override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds
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pvh.img: pvh.o pvh_main.o
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%.o: %.S
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$(call quiet-command,$(CPP) $(CPPFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$@")
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%.o: %.c
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$(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@,"CC","$@")
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%.img: %.o
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$(call quiet-command,$(LD) $(LDFLAGS) -s -o $@ $^,"BUILD","$@")
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%.raw: %.img
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$(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$@")
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%.bin: %.raw
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$(call quiet-command,$(PYTHON) $(TOPSRC_DIR)/scripts/signrom.py $< $@,"SIGN","$@")
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include $(wildcard *.d)
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clean:
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rm -f *.o *.d *.raw *.img *.bin *~
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# suppress auto-removal of intermediate files
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.SECONDARY:
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.PHONY: all clean
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