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Added dependencies for eboot.ld and Makefile to Makefile.

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Updated eboot.ld to not fill with zeros through the CS field
on its way to the CRC.
Added size test to elf2bin.py
This commit is contained in:
M Hightower 2020-01-29 13:05:59 -08:00
parent 9e9515b49f
commit fe7faf701e
4 changed files with 26 additions and 11 deletions
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7
bootloaders/eboot/Makefile
View File

@ -29,11 +29,11 @@ CFLAGS += $(INC)
CFLAGS += $(UZLIB_FLAGS)
LDFLAGS += -nostdlib -Wl,--no-check-sections -Wl,--gc-sections -umain
LDFLAGS += -nostdlib -Wl,--no-check-sections -Wl,--gc-sections -umain -Wl,-Map,$(@:.elf=.map)
LD_SCRIPT := -Teboot.ld
APP_OUT:= eboot.elf
APP_OUT := eboot.elf
APP_AR := eboot.a
APP_FW := eboot.bin
@ -49,13 +49,14 @@ tinfgzip.o: $(UZLIB_PATH)/tinfgzip.c $(UZLIB_PATH)/uzlib.h $(UZLIB_PATH)/uzlib_c
$(APP_AR): $(TARGET_OBJ_PATHS) tinflate.o tinfgzip.o
$(AR) cru $@ $^
$(APP_OUT): $(APP_AR)
$(APP_OUT): $(APP_AR) eboot.ld | Makefile
$(LD) $(LD_SCRIPT) $(LDFLAGS) -Wl,--start-group -Wl,--whole-archive $(APP_AR) -Wl,--end-group -o $@
clean:
rm -f *.o
rm -f $(APP_AR)
rm -f $(APP_OUT)
rm -f *.map
.PHONY: all clean default

BIN
bootloaders/eboot/eboot.elf
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Binary file not shown.

24
bootloaders/eboot/eboot.ld
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@ -154,12 +154,24 @@ SECTIONS
*(.gnu.linkonce.b.*)
. = ALIGN (8);
_bss_end = ABSOLUTE(.);
/* CRC stored in last 8 bytes */
ASSERT((. < 4096 - 8), "Error: No space for CRC in bootloader sector.");
. = _stext + 4096 - 8;
_crc_size = .;
. = . + 4;
_crc_val = .;
_free_space = 4096 - 17 - (. - _stext);
/*
The boot loader checksum must be before the CRC, which is written by elf2bin.py.
This leaves 16 bytes after the checksum for the CRC placed at the end of the
4096-byte sector. */
_cs_here = (ALIGN((. + 1), 16) == ALIGN(16)) ? (ALIGN(16) - 1) : (. + 0x0F);
/*
The filling (padding) and values for _crc_size and _crc_val are handled by
elf2bin.py. With this, we give values to the symbols without explicitly
assigning space. This avoids the linkers back *fill* operation that causes
trouble.
The CRC info is stored in last 8 bytes. */
_crc_size = _stext + 4096 - 8;
_crc_val = _stext + 4096 - 4;
ASSERT((4096 > (17 + (. - _stext))), "Error: No space for CS and CRC in bootloader sector.");
ASSERT((_crc_size > _cs_here), "Error: CRC must be located after CS.");
} >iram1_0_seg :iram1_0_phdr
.lit4 : ALIGN(4)

2
tools/elf2bin.py
View File

@ -93,6 +93,8 @@ def write_bin(out, elf, segments, to_addr, flash_mode, flash_size, flash_freq, p
out.write(bytearray([0]))
out.write(bytearray([checksum]))
if to_addr != 0:
if total_size + 8 > to_addr:
raise Exception('Bin image of ' + elf + ' is too big, actual size ' + str(total_size + 8) + ', target size ' + str(to_addr) + '.')
while total_size < to_addr:
out.write(bytearray([0xaa]))
total_size += 1