+BOOT_SEC_OFFSET = 0x$(shell echo "obase=16; (($(FLASH_SIZE_KB) * 1024) - $(strip $(1)))" | bc)
+BOOT_SECTION_LD_FLAG = -Wl,--section-start=.apitable_$(strip $(1))=$(call BOOT_SEC_OFFSET, $(3)) -Wl,--undefined=BootloaderAPI_$(strip $(2))
+BOOT_API_LD_FLAGS := $(call BOOT_SECTION_LD_FLAG, trampolines, Trampolines, (48 + 32 + 8))
+BOOT_API_LD_FLAGS += $(call BOOT_SECTION_LD_FLAG, jumptable, JumpTable, (32 + 8))
+BOOT_API_LD_FLAGS += $(call BOOT_SECTION_LD_FLAG, signatures, Signatures, 8)