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21 Commits
Author SHA1 Message Date
Henrik RydgårdandClaude Opus 5.5 6d122f416e Keep JIT block entries and replacement hooks out of PSP memory 
The JITs used to find a block by overwriting its first instruction with an "emuhack" holding
the offset into the code space, and replacement functions installed their own emuhack the same
way. Anything that read code (savestates, the debugger, memory dumps, cheats, the function
hasher, games reading their own code) had to translate them back.

Blocks now live in a block shadow: one u32 per guest instruction, indexed by the PC masked with
BLOCK_SHADOW_MASK (1GB on 64-bit, folding the kernel and uncached mirrors; 256MB on 32-bit, iOS
and Switch, where address space is short), with the low bits cleared so a misaligned PC can't
read across two entries. Only the ranges under memory views are committed, so a bad PC still
faults in the dispatcher, and the shadow is reserved before the memory map so it can't land in
a gap of the 4GB window. Entries hold full 32-bit offsets, lifting the 16MB limit. The
dispatchers on every backend, and the IR interpreter's loop, look blocks up there.

A hooked instruction without a compiled block gets the JIT's hook value in its entry: the offset
of the dispatcher's compile path (1 for the interpreters, the IR arena keeping that offset
empty), so dispatching there compiles a block, and the frontends substitute the hook. Compiling
replaces the entry with the block's, and destroying the block puts the hook value back. The hook
value is rewritten when the JIT changes or regenerates its dispatcher.

Hooks live in a map keyed by the masked address, and are dropped when the game overwrites the
hooked instruction, or when an icache invalidation finds the function's hash (immediates masked,
as when matching it) changed. Those checks run when queued invalidations are processed, since
cheats and the debugger queue them before writing. Installing and removing hooks invalidates
deferred, as it happens in HLE calls that can run inside a block. The cache instruction goes
through MIPSState, so it drops changed hooks too.

With clean memory, the save/clear/restore around savestates, memory reads and dumps goes away,
as do the source-range invalidations in the memcpy replacements, sceDmac and the cheats.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
 2026-10-11 10:33:30 +02:00
Henrik Rydgård 7a9a354e50 Add a MIPSState context pointer to the JitAt call 2026-09-21 17:34:10 -06:00
Henrik Rydgård eb0813c0e3 Add a utility function for all the ABIs to call functions with a pointer arg. Use to call Advance from the JIT with the MIPSContext. Indent some code better. 2026-08-13 08:09:30 +02:00
Henrik Rydgård dbe6ec80a0 Fix some bad "for (auto x : y)" usage 2025-04-29 16:46:14 +02:00
Henrik Rydgård 83af54950f Move more core-related stuff into Core.cpp/h 2024-12-08 11:54:58 +01:00
Henrik Rydgård e01ca5b057 Logging API change (refactor) (#19324) 
* Rename LogType to Log

* Explicitly use the Log:: enum when logging. Allows for autocomplete when editing.

* Mac/ARM64 buildfix

* Do the same with the hle result log macros

* Rename the log names to mixed case while at it.

* iOS buildfix

* Qt buildfix attempt, ARM32 buildfix
 2024-07-14 14:42:59 +02:00
Unknown W. Brackets 521335cb2a x86: Fix 32-bit IR jit block entry. 2023-10-02 20:26:07 -07:00
Unknown W. Brackets 9b2fa46861 IR: Add mini native jit MIPS block profiler. 2023-09-24 23:04:29 -07:00
Unknown W. Brackets da013ee105 x86jit: Fix asm jitbase displacement check. 2023-09-24 12:11:00 -07:00
Henrik Rydgård a84f08e55e Typo fix 
See #18080
 2023-09-06 11:21:41 +02:00
Unknown W. Brackets 0fc337cdc1 x86jit: Correct jitbase range comparison. 2023-09-05 23:56:36 -07:00
Unknown W. Brackets 1d152a1486 x86jit: Bake emuhack mask into jitbase. 2023-09-03 12:49:36 -07:00
Unknown W. Brackets c7304eccdb x86jit: Avoid R15 for jitbase if near ctxreg. 2023-09-02 23:05:56 -07:00
Unknown W. Brackets c4d13e522b x86jit: Use a literal pool to avoid rip checks. 2023-08-28 23:11:46 -07:00
Unknown W. Brackets 289cb71790 x86jit: Small tweaks to fixed code. 2023-08-28 21:09:56 -07:00
Unknown W. Brackets ee5381917a x86jit: Implement downcount in register. 2023-08-28 21:09:56 -07:00
Unknown W. Brackets 303aa0548c x86jit: Handle replacements directly. 2023-08-27 12:51:24 -07:00
Unknown W. Brackets bea74ba162 x86jit: Avoid negative offset warning. 2023-08-21 20:38:56 -07:00
Unknown W. Brackets 1ccc2d5d2f x86jit: Fix address offsets with memview mask. 2023-08-21 09:03:10 -07:00
Unknown W. Brackets a47b4424e5 x86jit: Fix some silly mistakes. 2023-08-20 22:28:54 -07:00
Unknown W. Brackets c491f701ba x86jit: Add initial IR-based jit backend. 
It works, but pretty slow in some parts with everything stubbed.
 2023-08-20 22:28:54 -07:00