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fix(agc): add missing Cb/Dcb GetSize stubs for packet sizing probes (#535)

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Unresolved GetSize NIDs returned NOT_FOUND during RenderThread startup,
leaving null packet pointers and an immediate write AV. Return fixed
packet byte sizes in rax only — no guest memory writes.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
MarcelMediaDev
2026-07-22 22:18:47 +01:00
committed by GitHub
parent 4682e64e81
commit 74a519875b
1 changed files with 80 additions and 0 deletions
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src/SharpEmu.Libs/Agc/AgcExports.cs
+80
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@@ -965,6 +965,20 @@ public static partial class AgcExports
return ReturnPointer(ctx, commandAddress);
}
// RenderThread/Subrender probe this before writing a NOP. Unresolved
// GetSize returns NOT_FOUND and leaves command-buffer sizing broken.
// CbNop rejects dwordCount < 2, so report that floor.
[SysAbiExport(
Nid = "t7PlZ9nt5Lc",
ExportName = "sceAgcCbNopGetSize",
Target = Generation.Gen5,
LibraryName = "libSceAgc")]
public static int CbNopGetSize(CpuContext ctx)
{
ctx[CpuRegister.Rax] = 2u * sizeof(uint);
return (int)ctx[CpuRegister.Rax];
}
[SysAbiExport(
Nid = "k3GhuSNmBLU",
ExportName = "sceAgcCbDispatch",
@@ -1162,6 +1176,18 @@ public static partial class AgcExports
return ReturnPointer(ctx, commandAddress);
}
// Matches the fixed 8-dword ACQUIRE_MEM packet AcbAcquireMem writes above.
[SysAbiExport(
Nid = "ewobAQeMo5k",
ExportName = "sceAgcAcbAcquireMemGetSize",
Target = Generation.Gen5,
LibraryName = "libSceAgc")]
public static int AcbAcquireMemGetSize(CpuContext ctx)
{
ctx[CpuRegister.Rax] = 8u * sizeof(uint);
return (int)ctx[CpuRegister.Rax];
}
[SysAbiExport(
Nid = "htn36gPnBk4",
ExportName = "sceAgcAcbWaitRegMem",
@@ -1737,6 +1763,18 @@ public static partial class AgcExports
return ReturnPointer(ctx, commandAddress);
}
// Matches the fixed 8-dword ACQUIRE_MEM packet DcbAcquireMem writes above.
[SysAbiExport(
Nid = "-vnlTPPXPrw",
ExportName = "sceAgcDcbAcquireMemGetSize",
Target = Generation.Gen5,
LibraryName = "libSceAgc")]
public static int DcbAcquireMemGetSize(CpuContext ctx)
{
ctx[CpuRegister.Rax] = 8u * sizeof(uint);
return (int)ctx[CpuRegister.Rax];
}
[SysAbiExport(
Nid = "i1jyy49AjXU",
ExportName = "sceAgcDcbWriteData",
@@ -2390,6 +2428,20 @@ public static partial class AgcExports
: OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
}
// PatchAddress/PatchData touch UInt64 fields at +12/+20 of an RReleaseMem
// packet, so the packet is at least 7 dwords; use the 8-dword RELEASE_MEM
// family size already used elsewhere in this file.
[SysAbiExport(
Nid = "hL7C0IRpWZI",
ExportName = "sceAgcCbQueueEndOfPipeActionGetSize",
Target = Generation.Gen5,
LibraryName = "libSceAgc")]
public static int CbQueueEndOfPipeActionGetSize(CpuContext ctx)
{
ctx[CpuRegister.Rax] = 8u * sizeof(uint);
return (int)ctx[CpuRegister.Rax];
}
[SysAbiExport(
Nid = "0fWWK5uG9rQ",
ExportName = "sceAgcQueueEndOfPipeActionPatchAddress",
@@ -11469,6 +11521,34 @@ public static partial class AgcExports
$"[LOADER][TRACE] agc.create_shader dst=0x{destinationAddress:X16} header=0x{headerAddress:X16} code=0x{codeAddress:X16} {detail}");
}
// Hardware REWIND is a fixed 2-dword header + valid-bit packet (same floor
// as CbNopGetSize). No Rewind writer is implemented yet; size-only is enough
// for callers that allocate the packet before filling it.
[SysAbiExport(
Nid = "QIXCsbipds0",
ExportName = "sceAgcDcbRewindGetSize",
Target = Generation.Gen5,
LibraryName = "libSceAgc")]
public static int DcbRewindGetSize(CpuContext ctx)
{
ctx[CpuRegister.Rax] = 2u * sizeof(uint);
return (int)ctx[CpuRegister.Rax];
}
// Matches the 4-dword INDIRECT_BUFFER packet DcbJump writes below.
// Returning NOT_FOUND here left callers with a null packet pointer and an
// immediate write AV on RenderThread.
[SysAbiExport(
Nid = "VEGu4dixjUg",
ExportName = "sceAgcDcbJumpGetSize",
Target = Generation.Gen5,
LibraryName = "libSceAgc")]
public static int DcbJumpGetSize(CpuContext ctx)
{
ctx[CpuRegister.Rax] = 4u * sizeof(uint);
return (int)ctx[CpuRegister.Rax];
}
[SysAbiExport(
Nid = "xSAR0LTcRKM",
ExportName = "sceAgcDcbJump",