sceAgcCbSetShRegistersDirect and the other register list writers threw on
a count of 0 although the matching size functions report 0 words for it.
PPSA05684 calls the writer with an empty list at its main menu and
terminated. An empty list now writes no packet and returns the cursor,
as its size says; a null buffer still throws.
AI-assisted: yes
Write SET_CONFIG_REG (0x68) packets like the context, shader and user
config register setters: one register from a ShaderRegister, or a range
of values at an offset.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Unreal Engine reserves SET_*_REG_INDIRECT packets with a null register
list and no registers, and fills them in later with the
sceAgcSet*RegIndirectPatch* functions. The writers rejected the null
address. A null list is now accepted when it holds no registers, which
reads nothing; a null list with registers still throws.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
sceAgcCbSetShRegistersDirectGetSize and sceAgcCbSetUcRegistersDirectGetSize
return the bytes their writers need when no two registers are adjacent: one
three-word packet per register. Adjacent registers are merged into ranges
and take less. A count whose size does not fit 32 bits throws.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
hugodearaujo