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This commit is contained in:
rjkiv
2025-08-07 14:35:39 -07:00
parent 4546ab04d5
commit 61fa3084fb
3 changed files with 67 additions and 15 deletions
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61
dll/kernel32.cpp
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@@ -468,7 +468,7 @@ namespace kernel32 {
}
LPWSTR WIN_FUNC GetCommandLineW() {
DEBUG_LOG("GetCommandLineW -> ");
DEBUG_LOG("GetCommandLineW -> \n");
return wibo::commandLineW.data();
}
@@ -1724,23 +1724,54 @@ namespace kernel32 {
}
void *WIN_FUNC VirtualAlloc(void *lpAddress, unsigned int dwSize, unsigned int flAllocationType, unsigned int flProtect) {
DEBUG_LOG("VirtualAlloc %p %u %u %u\n",lpAddress, dwSize, flAllocationType, flProtect);
if (flAllocationType & 0x2000 || lpAddress == NULL) { // MEM_RESERVE
// do this for now...
assert(lpAddress == NULL);
void *mem = 0;
posix_memalign(&mem, 0x1000, dwSize);
memset(mem, 0, dwSize);
DEBUG_LOG("VirtualAlloc %p %u %u %u\n", lpAddress, dwSize, flAllocationType, flProtect);
// Windows only fences off the lower 2GB of the 32-bit address space for the private use of processes.
assert(mem < (void*)0x80000000);
DEBUG_LOG("-> %p\n", mem);
return mem;
int prot = PROT_READ | PROT_WRITE;
if (flProtect == 0x04 /* PAGE_READWRITE */) {
prot = PROT_READ | PROT_WRITE;
} else if (flProtect == 0x02 /* PAGE_READONLY */) {
prot = PROT_READ;
} else if (flProtect == 0x40 /* PAGE_EXECUTE_READWRITE */) {
prot = PROT_READ | PROT_WRITE | PROT_EXEC;
} else {
assert(lpAddress != NULL);
return lpAddress;
DEBUG_LOG("Unhandled flProtect: %u, defaulting to RW\n", flProtect);
}
int flags = MAP_PRIVATE | MAP_ANONYMOUS; // MAP_ANONYMOUS ensures the memory is zeroed out
if (lpAddress != NULL) {
flags |= MAP_FIXED;
}
void* result = mmap(lpAddress, dwSize, prot, flags, -1, 0);
// Windows only fences off the lower 2GB of the 32-bit address space for the private use of processes.
assert(result < (void*)0x80000000);
if (result == MAP_FAILED) {
DEBUG_LOG("mmap failed\n");
return NULL;
}
else {
DEBUG_LOG("-> %p\n", result);
return result;
}
// DEBUG_LOG("VirtualAlloc %p %u %u %u\n",lpAddress, dwSize, flAllocationType, flProtect);
// if (flAllocationType & 0x2000 || lpAddress == NULL) { // MEM_RESERVE
// // do this for now...
// assert(lpAddress == NULL);
// void *mem = 0;
// posix_memalign(&mem, 0x1000, dwSize);
// memset(mem, 0, dwSize);
// // Windows only fences off the lower 2GB of the 32-bit address space for the private use of processes.
// assert(mem < (void*)0x80000000);
// DEBUG_LOG("-> %p\n", mem);
// return mem;
// } else {
// assert(lpAddress != NULL);
// return lpAddress;
// }
}
unsigned int WIN_FUNC VirtualFree(void *lpAddress, unsigned int dwSize, int dwFreeType) {