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https://github.com/riscv-software-src/opensbi.git
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0f20e8adcf
Enable OpenSBI to support position independent execution. Because the position independent code will cause an additional GOT reference when accessing the global variables, it will reduce performance a bit. Therefore, the position independent execution is disabled by default. Users can through specifying "FW_PIC=y" on the make command to enable this feature. In theory, after enabling position-independent execution, the OpenSBI can run at arbitrary address with appropriate alignment. Therefore, the original relocation mechanism will be skipped. In other words, OpenSBI will directly run at the load address without any code movement. Signed-off-by: Vincent Chen <vincent.chen@sifive.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
65 lines
1.6 KiB
Makefile
65 lines
1.6 KiB
Makefile
#
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# SPDX-License-Identifier: BSD-2-Clause
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#
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# Copyright (c) 2019 Western Digital Corporation or its affiliates.
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#
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# Authors:
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# Anup Patel <anup.patel@wdc.com>
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#
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firmware-genflags-y =
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firmware-cppflags-y +=
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firmware-cflags-y +=
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firmware-asflags-y +=
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firmware-ldflags-y +=
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ifeq ($(FW_PIC),y)
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firmware-genflags-y += -DFW_PIC
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firmware-asflags-y += -fpic
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firmware-cflags-y += -fPIE -pie
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firmware-ldflags-y += -Wl,--no-dynamic-linker
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endif
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ifdef FW_TEXT_START
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firmware-genflags-y += -DFW_TEXT_START=$(FW_TEXT_START)
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endif
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ifdef FW_FDT_PATH
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firmware-genflags-y += -DFW_FDT_PATH=\"$(FW_FDT_PATH)\"
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ifdef FW_FDT_PADDING
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firmware-genflags-y += -DFW_FDT_PADDING=$(FW_FDT_PADDING)
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endif
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endif
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firmware-bins-$(FW_DYNAMIC) += fw_dynamic.bin
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firmware-bins-$(FW_JUMP) += fw_jump.bin
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ifdef FW_JUMP_ADDR
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firmware-genflags-$(FW_JUMP) += -DFW_JUMP_ADDR=$(FW_JUMP_ADDR)
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endif
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ifdef FW_JUMP_FDT_ADDR
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firmware-genflags-$(FW_JUMP) += -DFW_JUMP_FDT_ADDR=$(FW_JUMP_FDT_ADDR)
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endif
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firmware-bins-$(FW_PAYLOAD) += fw_payload.bin
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ifdef FW_PAYLOAD_PATH
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FW_PAYLOAD_PATH_FINAL=$(FW_PAYLOAD_PATH)
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else
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FW_PAYLOAD_PATH_FINAL=$(platform_build_dir)/firmware/payloads/test.bin
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endif
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firmware-genflags-$(FW_PAYLOAD) += -DFW_PAYLOAD_PATH=\"$(FW_PAYLOAD_PATH_FINAL)\"
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ifdef FW_PAYLOAD_OFFSET
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firmware-genflags-$(FW_PAYLOAD) += -DFW_PAYLOAD_OFFSET=$(FW_PAYLOAD_OFFSET)
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endif
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ifdef FW_PAYLOAD_ALIGN
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firmware-genflags-$(FW_PAYLOAD) += -DFW_PAYLOAD_ALIGN=$(FW_PAYLOAD_ALIGN)
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endif
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ifdef FW_PAYLOAD_FDT_ADDR
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firmware-genflags-$(FW_PAYLOAD) += -DFW_PAYLOAD_FDT_ADDR=$(FW_PAYLOAD_FDT_ADDR)
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endif
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ifdef FW_OPTIONS
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firmware-genflags-y += -DFW_OPTIONS=$(FW_OPTIONS)
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endif
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