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kern/ldr: move crt0 into .rodata

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Michael Scire 2023-10-11 02:59:41 -07:00 • committed by SciresM
parent 4ca3c44e5f
commit 0daef4a6e8
7 changed files with 220 additions and 90 deletions
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17
mesosphere/build_mesosphere.py
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@ -17,11 +17,16 @@ def main(argc, argv):
kernel_ldr = f.read()
with open(argv[2], 'rb') as f:
kernel = f.read()
kernel_metadata_offset = 4
kernel_metaptr_offset = 4
assert (kernel_metaptr_offset <= len(kernel) - 0x40)
assert (kernel[kernel_metaptr_offset:kernel_metaptr_offset + 4] == b'MSS1')
kernel_metadata_offset = up('<I', kernel[kernel_metaptr_offset+4:kernel_metaptr_offset+8])[0]
assert (kernel_metadata_offset <= len(kernel) - 0x40)
assert (kernel[kernel_metadata_offset:kernel_metadata_offset + 4] == b'MSS0')
bss_start, bss_end, kernel_end = up('<III', kernel[kernel_metadata_offset + 0x30:kernel_metadata_offset + 0x3C])
bss_start, bss_end, kernel_end = up('<III', kernel[kernel_metadata_offset + 0x2C:kernel_metadata_offset + 0x38])
bss_start += kernel_metadata_offset + 0x14
bss_end += kernel_metadata_offset + 0x14
kernel_end += kernel_metadata_offset + 0x14
assert (bss_end >= bss_start)
assert (bss_end == kernel_end)
@ -53,9 +58,9 @@ def main(argc, argv):
mesosphere_end = align_up(kernel_ldr_end, 0x1000)
with open(argv[3], 'wb') as f:
f.write(kernel[:kernel_metadata_offset + 4])
f.write(pk('<QQI', embedded_ini_offset, kernel_ldr_offset, atmosphere_target_firmware(13, 0, 0)))
f.write(kernel[kernel_metadata_offset + 0x18:])
f.write(kernel[:kernel_metadata_offset])
f.write(pk('<QQI', embedded_ini_offset - (kernel_metadata_offset), kernel_ldr_offset - (kernel_metadata_offset + 8), atmosphere_target_firmware(17, 0, 0)))
f.write(kernel[kernel_metadata_offset + 0x14:])
f.seek(embedded_ini_offset)
f.write(embedded_ini_header)
f.write(embedded_kips)