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Load injected firmware modules at the top of user memory, not the bottom

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The flash0 PRXes we swap in for our HLE took the lowest free block, which sits
right where a game's own EBOOT wants to go. That pushes the game up, shifting
every address in it - invalidating cheats and RetroAchievements - and for a game
whose EBOOT has to load at a fixed low address it fails outright: Tekken 6 wants
0x08804018 and got "block taken", so it didn't boot at all.

Give KernelLoadModule a fromTop flag and use it for the modules we inject. The
game keeps its normal load address and the firmware sits out of the way at the
top.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GgACRqkQNpfJQ4fjwyoEup
This commit is contained in:
Henrik Rydgård
2026-09-08 11:43:49 -06:00
co-authored by Claude Opus 5
parent 1fc823681f
commit c0c715ac2e
3 changed files with 8 additions and 4 deletions
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Core/HLE/sceKernelModule.cpp
+2 -2
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@@ -1921,14 +1921,14 @@ static PSPModule *__KernelLoadELFFromPtr(const u8 *ptr, size_t elfSize, u32 load
return module;
}
SceUID KernelLoadModule(const std::string &filename, std::string *error_string) {
SceUID KernelLoadModule(const std::string &filename, std::string *error_string, bool fromTop) {
std::vector<uint8_t> buffer;
if (pspFileSystem.ReadEntireFile(filename, buffer) < 0)
return SCE_KERNEL_ERROR_NOFILE;
u32 error = SCE_KERNEL_ERROR_ILLEGAL_OBJECT;
u32 magic;
PSPModule *module = __KernelLoadELFFromPtr(&buffer[0], buffer.size(), 0, false, error_string, &magic, filename, error);
PSPModule *module = __KernelLoadELFFromPtr(&buffer[0], buffer.size(), 0, fromTop, error_string, &magic, filename, error);
if (module == nullptr)
return error;