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kern: put rela in bss

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NOTE: This saves ~0x4000 of space at the cost of crimes against the linker script.
This commit is contained in:
Michael Scire 2021-10-08 12:29:53 -07:00
parent fba962ef11
commit 960ba52a43
4 changed files with 25 additions and 19 deletions
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12
mesosphere/build_mesosphere.py
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@ -9,7 +9,6 @@ def align_up(val, algn):
val += algn - 1
return val - (val % algn)
def main(argc, argv):
if argc != 4:
print('Usage: %s kernel_ldr.bin kernel.bin output.bin' % argv[0])
@ -21,8 +20,15 @@ def main(argc, argv):
kernel_metadata_offset = 4
assert (kernel_metadata_offset <= len(kernel) - 0x40)
assert (kernel[kernel_metadata_offset:kernel_metadata_offset + 4] == b'MSS0')
kernel_end = up('<I', kernel[kernel_metadata_offset + 0x38:kernel_metadata_offset + 0x3C])[0]
assert (kernel_end >= len(kernel))
bss_start, bss_end, kernel_end = up('<III', kernel[kernel_metadata_offset + 0x30:kernel_metadata_offset + 0x3C])
assert (bss_end >= bss_start)
assert (bss_end == kernel_end)
assert (len(kernel) <= kernel_end)
if len(kernel) < kernel_end:
kernel += b'\x00' * (kernel_end - len(kernel))
assert (kernel_end == len(kernel))
embedded_ini = b''
try: