mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-05-19 09:39:05 +00:00
77 lines
2.8 KiB
Python
77 lines
2.8 KiB
Python
#!/usr/bin/env python
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import sys, os
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from struct import pack as pk, unpack as up
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def atmosphere_target_firmware(major, minor, micro, rev = 0):
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return (major << 24) | (minor << 16) | (micro << 8) | rev
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def align_up(val, algn):
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val += algn - 1
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return val - (val % algn)
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def main(argc, argv):
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if argc < 4:
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print('Usage: %s kernel_ldr.bin kernel.bin output.bin [initial_process.kip ...]' % argv[0])
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return 1
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with open(argv[1], 'rb') as f:
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kernel_ldr = f.read()
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with open(argv[2], 'rb') as f:
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kernel = f.read()
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kernel_metaptr_offset = 4
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assert (kernel_metaptr_offset <= len(kernel) - 0x40)
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assert (kernel[kernel_metaptr_offset:kernel_metaptr_offset + 4] == b'MSS1')
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kernel_metadata_offset = up('<I', kernel[kernel_metaptr_offset+4:kernel_metaptr_offset+8])[0]
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assert (kernel_metadata_offset <= len(kernel) - 0x40)
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bss_start, bss_end, kernel_end = up('<III', kernel[kernel_metadata_offset + 0x2C:kernel_metadata_offset + 0x38])
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bss_start += kernel_metadata_offset + 0x14
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bss_end += kernel_metadata_offset + 0x14
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kernel_end += kernel_metadata_offset + 0x14
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assert (bss_end >= bss_start)
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assert (bss_end == kernel_end)
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assert (len(kernel) <= kernel_end)
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if len(kernel) < kernel_end:
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kernel += b'\x00' * (kernel_end - len(kernel))
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assert (kernel_end == len(kernel))
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embedded_kips = b''
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num_kips = 0
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for kip_file in argv[4:]:
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try:
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with open(kip_file, 'rb') as f:
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data = f.read()
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if data.startswith(b'KIP1'):
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embedded_kips += data
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num_kips += 1
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except:
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pass
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if num_kips > 0:
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embedded_ini_header = pk('<4sIII', b'INI1', len(embedded_kips) + 0x10, num_kips, 0)
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else:
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embedded_ini_header = b''
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embedded_ini_offset = align_up(kernel_end, 0x1000)
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embedded_ini_end = embedded_ini_offset + len(embedded_ini_header) + len(embedded_kips)
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kernel_ldr_offset = align_up(embedded_ini_end, 0x1000) + (0x1000 if len(embedded_ini_header) == 0 else 0)
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kernel_ldr_end = kernel_ldr_offset + len(kernel_ldr)
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mesosphere_end = align_up(kernel_ldr_end, 0x1000)
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with open(argv[3], 'wb') as f:
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f.write(kernel[:kernel_metadata_offset])
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f.write(pk('<QQI', embedded_ini_offset - (kernel_metadata_offset), kernel_ldr_offset - (kernel_metadata_offset + 8), atmosphere_target_firmware(17, 0, 0)))
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f.write(kernel[kernel_metadata_offset + 0x14:])
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f.seek(embedded_ini_offset)
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f.write(embedded_ini_header)
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f.write(embedded_kips)
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f.seek(embedded_ini_end)
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f.seek(kernel_ldr_offset)
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f.write(kernel_ldr)
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f.seek(mesosphere_end)
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f.write(b'\x00'*0x1000)
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return 0
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if __name__ == '__main__':
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sys.exit(main(len(sys.argv), sys.argv))
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