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Patches/PPU: Extend and improve patching capabilities (code allocations, jumps to any address) (#10779)

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* Patches/PPU: Implement dynamic code allocation + Any-Address jump patches

Also fix deallocation path of fixed allocation patches.
This commit is contained in:
Eladash 2021-09-01 13:38:17 +03:00 • committed by GitHub
parent ee6e4c493d
commit b40ed5bdb7
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 339 additions and 72 deletions
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6
Utilities/bin_patch.h
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@ -27,6 +27,8 @@ enum class patch_type
invalid,
load,
alloc, // Allocate memory at address (zeroized executable memory)
code_alloc,// Allocate memory somewhere, saves branch to memory at specfied address (filled with PPU NOP and branch for returning)
jump, // Install special 32-bit jump instruction (PPU only atm)
byte,
le16,
le32,
@ -56,6 +58,7 @@ public:
u64 long_value;
f64 double_value;
} value{0};
mutable u32 alloc_addr = 0; // Used to save optional allocation address (if occured)
};
using patch_app_versions = std::unordered_map<std::string /*app_version*/, bool /*enabled*/>;
@ -148,6 +151,9 @@ public:
// Apply patch (returns the number of entries applied)
std::basic_string<u32> apply(const std::string& name, u8* dst, u32 filesz = -1, u32 min_addr = 0);
// Deallocate memory used by patches
void unload(const std::string& name);
private:
// Database
patch_map m_map{};