fix(libs): fix libc building on win

core/libs/prx/libc/src/FileAndHeap.cpp

@@ -1,6 +1,8 @@
 #include <cstddef>
+#include <cstdint>
 #include <cstdio>
 #include <cstdlib>
+#include <new>
 
 extern "C" {
 
@@ -36,20 +38,56 @@ int fflush_nid_postfix(FILE* stream) {
     return std::fflush(stream);
 }
 
+constexpr std::uintptr_t AlignedBlockTag = 1;
+
 void* malloc_nid_postfix(size_t size) {
-    return std::malloc(size);
+    const size_t headerSize = sizeof(std::uintptr_t);
+    void* rawPtr = std::malloc(size + headerSize);
+    if (rawPtr == nullptr) {
+        throw std::bad_alloc();
+    }
+    *reinterpret_cast<std::uintptr_t*>(rawPtr) = 0;
+    return static_cast<char*>(rawPtr) + headerSize;
 }
 
 void free_nid_postfix(void* ptr) {
-    std::free(ptr);
+    if (ptr == nullptr) {
+        return;
+    }
+    const std::uintptr_t headerValue = reinterpret_cast<std::uintptr_t*>(ptr)[-1];
+    if (headerValue == AlignedBlockTag) {
+        std::free(reinterpret_cast<void**>(ptr)[-2]);
+    } else {
+        std::free(reinterpret_cast<char*>(ptr) - sizeof(std::uintptr_t));
+    }
 }
 
 void* realloc_nid_postfix(void* ptr, size_t newSize) {
-    return std::realloc(ptr, newSize);
+    if (ptr == nullptr) {
+        return malloc_nid_postfix(newSize);
+    }
+    const size_t headerSize = sizeof(std::uintptr_t);
+    void* rawPtr = static_cast<char*>(ptr) - headerSize;
+    void* newRawPtr = std::realloc(rawPtr, newSize + headerSize);
+    if (newRawPtr == nullptr) {
+        throw std::bad_alloc();
+    }
+    return static_cast<char*>(newRawPtr) + headerSize;
 }
 
 void* memalign_nid_postfix(size_t alignment, size_t size) {
-    return std::aligned_alloc(alignment, size);
+    const size_t headerSize = sizeof(void*) * 2;
+    const size_t worstCaseSize = size + alignment + headerSize;
+    void* rawPtr = std::malloc(worstCaseSize);
+    if (rawPtr == nullptr) {
+        throw std::bad_alloc();
+    }
+    const std::uintptr_t rawAddress = reinterpret_cast<std::uintptr_t>(rawPtr) + headerSize;
+    const std::uintptr_t alignedAddress = (rawAddress + alignment - 1) & ~(alignment - 1);
+    void* alignedPtr = reinterpret_cast<void*>(alignedAddress);
+    reinterpret_cast<void**>(alignedPtr)[-1] = reinterpret_cast<void*>(AlignedBlockTag);
+    reinterpret_cast<void**>(alignedPtr)[-2] = rawPtr;
+    return alignedPtr;
 }
 
 void qsort_nid_postfix(void* base, size_t count, size_t size, int (*compare)(const void*, const void*)) {

core/libs/prx/libc/src/Process.cpp

@@ -1,5 +1,6 @@
 #include <cstdint>
 #include <cstdlib>
+#include <cstring>
 #include <cerrno>
 #include "SceTypes.hpp"
 
@@ -37,7 +38,21 @@ int atexit_nid_postfix(atexit_func_t func) {
 }
 
 int setenv_nid_postfix(const char* name, const char* value, int overwrite) {
-    return ::setenv(name, value, overwrite);
+    if (overwrite == 0 && std::getenv(name) != nullptr) {
+        return 0;
+    }
+    const size_t nameLength = std::strlen(name);
+    const size_t valueLength = std::strlen(value);
+    char* entry = static_cast<char*>(std::malloc(nameLength + valueLength + 2));
+    if (entry == nullptr) {
+        errno = ENOMEM;
+        return -1;
+    }
+    std::memcpy(entry, name, nameLength);
+    entry[nameLength] = '=';
+    std::memcpy(entry + nameLength + 1, value, valueLength);
+    entry[nameLength + 1 + valueLength] = '\0';
+    return ::putenv(entry);
 }
 
 }