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Romlib is a new image that is stored in ROM and contains the code of several libraries that can be shared between different images. All the functions within in the library are accessed using a jump table which allows to update the romlib image whithout changing the binary compatibility. This jump table can be also stored in RAM and it can allow to patch a romlib with potential bugs fixes.. Change-Id: If980ccdaca24b7aaca900e32acc68baf6f94ab35 Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
71 lines
1.7 KiB
Makefile
71 lines
1.7 KiB
Makefile
#
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# Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
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#
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# SPDX-License-Identifier: BSD-3-Clause
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#
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AS = $(CROSS_COMPILE)as
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LD = $(CROSS_COMPILE)ld
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OC = $(CROSS_COMPILE)objcopy
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CPP = $(CROSS_COMPILE)cpp
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BUILD_DIR = ../../$(BUILD_PLAT)/romlib
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LIB_DIR = ../../$(BUILD_PLAT)/lib
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WRAPPER_DIR = ../../$(BUILD_PLAT)/libwrapper
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LIBS = -lmbedtls -lfdt -lc
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INC = $(INCLUDES:-I%=-I../../%)
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PPFLAGS = $(INC) $(DEFINES) -P -D__ASSEMBLY__ -D__LINKER__ -MD -MP -MT $(BUILD_DIR)/romlib.ld
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OBJS = $(BUILD_DIR)/jmptbl.o $(BUILD_DIR)/init.o
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V ?= 0
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ifeq ($(V),0)
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Q := @
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else
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Q :=
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endif
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ifeq ($(DEBUG),1)
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CFLAGS := -g
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LDFLAGS := -g
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endif
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.PHONY: all clean distclean
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all: $(BUILD_DIR)/romlib.bin $(LIB_DIR)/libwrappers.a
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%.o: %.s
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@echo " AS $@"
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$(Q)$(AS) $(ASFLAGS) -o $@ $<
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$(BUILD_DIR)/%.o: %.s
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@echo " AS $@"
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$(Q)$(AS) $(ASFLAGS) -o $@ $<
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$(BUILD_DIR)/romlib.ld: romlib.ld.S
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@echo " PP $@"
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$(Q)$(CPP) $(PPFLAGS) -o $@ romlib.ld.S
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$(BUILD_DIR)/romlib.elf: $(OBJS) $(BUILD_DIR)/romlib.ld
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@echo " LD $@"
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$(Q)$(LD) -T $(BUILD_DIR)/romlib.ld -L$(LIB_DIR) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
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$(BUILD_DIR)/romlib.bin: $(BUILD_DIR)/romlib.elf
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@echo " BIN $@"
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$(Q)$(OC) -O binary $(BUILD_DIR)/romlib.elf $@
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$(WRAPPER_DIR)/jmpvar.s: $(BUILD_DIR)/romlib.elf
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@echo " VAR $@"
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$(Q)./genvar.sh -o $@ $(BUILD_DIR)/romlib.elf
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$(LIB_DIR)/libwrappers.a: jmptbl.i $(WRAPPER_DIR)/jmpvar.o
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@echo " AR $@"
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$(Q)./genwrappers.sh -b $(WRAPPER_DIR) -o $@ jmptbl.i
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$(BUILD_DIR)/jmptbl.s: jmptbl.i
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@echo " TBL $@"
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$(Q)./gentbl.sh -o $@ jmptbl.i
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clean:
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@rm -f $(BUILD_DIR)/*
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-include $(BUILD_DIR)/romlib.d
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