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loader: zero unresolved scalar floating-point returns

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Extracted from 3db2b3c5c5e1a26a861df7ebcacd9ccb8c484420 in KytyPS5/KytyPS5#147.
This commit is contained in:
Stefanos Costa
2026-08-01 22:59:51 +03:00
committed by nmzik
parent 0b6bf01b36
commit 302b579779
1 changed files with 5 additions and 1 deletions
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src/loader/runtimeLinker.cpp
+5 -1
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@@ -148,7 +148,7 @@ static bool PatchGuestMemory64(uint64_t vaddr, uint64_t value) {
} }
static uint64_t AllocateUnresolvedImportThunk(uint64_t record_id) { static uint64_t AllocateUnresolvedImportThunk(uint64_t record_id) {
constexpr uint64_t thunk_size = 162; constexpr uint64_t thunk_size = 165;
if (g_unresolved_stub_thunk_pages.empty() || if (g_unresolved_stub_thunk_pages.empty() ||
g_unresolved_stub_thunk_offset + thunk_size > UNRESOLVED_STUB_PAGE_SIZE) { g_unresolved_stub_thunk_offset + thunk_size > UNRESOLVED_STUB_PAGE_SIZE) {
@@ -254,6 +254,10 @@ static uint64_t AllocateUnresolvedImportThunk(uint64_t record_id) {
emit(0x41); emit(0x41);
emit(0xff); emit(0xff);
emit(0xe3); // jmp r11 emit(0xe3); // jmp r11
// Match the integer fallback for floating-point return values.
emit(0x0f);
emit(0x57);
emit(0xc0); // xorps xmm0, xmm0
emit(0x31); emit(0x31);
emit(0xc0); // xor eax, eax emit(0xc0); // xor eax, eax
emit(0xc3); // ret emit(0xc3); // ret