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Modify CDC and DFU bootloaders so that the various BootloaderAPI components are in unique sections and mapped explicitly - this will ensure the API and signature entries are always linked at the correct explicit address.

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This commit is contained in:
Dean Camera 2012-06-15 16:02:19 +00:00
parent c4ebddd27a
commit 4da2ba9f1c
4 changed files with 93 additions and 71 deletions
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13
Bootloaders/DFU/makefile
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@ -15,10 +15,15 @@
FLASH_SIZE_KB := 128
BOOT_SECTION_SIZE_KB := 8
# Bootloader address calculations (requires the "bc" unix utility) - do
# not modify these calculations, but rather modify the depedant values above.
# Bootloader address calculations (requires the "bc" unix utility) and
# API section start directives - do not modify these macros, but rather
# modify the depedant values above.
BOOT_START := 0x$(shell echo "obase=16; ($(FLASH_SIZE_KB) - $(BOOT_SECTION_SIZE_KB)) * 1024" | bc)
BOOT_API_TABLESTART := 0x$(shell echo "obase=16; (($(FLASH_SIZE_KB) * 1024) - 96)" | bc)
BOOT_SEC_OFFSET = 0x$(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)
MCU = at90usb1287
ARCH = AVR8
@ -30,7 +35,7 @@ TARGET = BootloaderDFU
SRC = $(TARGET).c Descriptors.c BootloaderAPI.c BootloaderAPITable.S $(LUFA_SRC_USB)
LUFA_PATH = ../../LUFA/
CC_FLAGS = -DUSE_LUFA_CONFIG_HEADER -IConfig/ -DBOOT_START_ADDR=$(BOOT_START)
LD_FLAGS = -Wl,--section-start=.text=$(BOOT_START) -Wl,--section-start=.apitable=$(BOOT_API_TABLESTART) -Wl,--undefined=BootloaderAPI_JumpTable
LD_FLAGS = -Wl,--section-start=.text=$(BOOT_START) $(BOOT_API_LD_FLAGS)
# Default target
all: