It's unknown how Loader determines where to store the [[Loader_services#AddProcessToLaunchQueue|arguments]]. Official processes use argdata_addr = {page-aligned _end}. svcQueryMemory is used by official sw to verify that argdata_addr is mapped RW. Afterwards, official sw aligns the argdata_addr to 4-bytes. Structure located at argdata_addr:
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Loader maps memory and writes the [[Loader_services#AddProcessToLaunchQueue|arguments]] to {end of rwdata section specified by last SegmentHeader}. Official processes use argdata_addr = {page-aligned _end}. svcQueryMemory is used by official sw to verify that argdata_addr is mapped RW, since this memory is only mapped when arguments are specified via that command. Afterwards, official sw aligns the argdata_addr to 4-bytes. Structure located at argdata_addr:
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! Description
! Description
|-
|-
−
| 0x0 || 0x4 || This is the total allocated space relative to argdata_addr, used for calculating the max size of the argv ptr array.
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| 0x0 || 0x4 || This is the total allocated space relative to argdata_addr, used for calculating the max size of the argv ptr array. Normally 0x9000?
|-
|-
| 0x4 || 0x4 || This is the total_bytesize of the actual argdata string.
| 0x4 || 0x4 || This is the total_bytesize of the actual argdata string.