Fix compiler issues in 32-bit

Architecture/i386/ArithmeticOperations.c

@@ -298,23 +298,25 @@ typedef struct
 	uint64_t value;
 } atomic_uint64_t;
 
-uint64_t __atomic_load_8(const atomic_uint64_t *p)
-{
-	uint64_t value;
-	__asm__ volatile("lock cmpxchg8b %1"
-					 : "=A"(value)
-					 : "m"(*p)
-					 : "memory");
-	return value;
-}
+/* No longer needed? */
 
-void __atomic_store_8(atomic_uint64_t *p, uint64_t value)
-{
-	__asm__ volatile("lock cmpxchg8b %0"
-					 : "=m"(p->value)
-					 : "a"((uint32_t)value), "d"((uint32_t)(value >> 32)), "m"(*p)
-					 : "memory");
-}
+// uint64_t __atomic_load_8(const atomic_uint64_t *p)
+// {
+// 	uint64_t value;
+// 	__asm__ volatile("lock cmpxchg8b %1"
+// 					 : "=A"(value)
+// 					 : "m"(*p)
+// 					 : "memory");
+// 	return value;
+// }
+
+// void __atomic_store_8(atomic_uint64_t *p, uint64_t value)
+// {
+// 	__asm__ volatile("lock cmpxchg8b %0"
+// 					 : "=m"(p->value)
+// 					 : "a"((uint32_t)value), "d"((uint32_t)(value >> 32)), "m"(*p)
+// 					 : "memory");
+// }
 
 int __fixsfsi(float a)
 {

Architecture/i386/Bootstrap/Multiboot/2/Multiboot.cpp

@@ -41,7 +41,6 @@ EXTERNC void multiboot_main(uintptr_t Magic, uintptr_t Info)
 	BootInfo mb2binfo{};
 
 	{
-		int pos = 0;
 		auto InfoAddress = Info;
 		for (auto Tag = (struct multiboot_tag *)((uint8_t *)InfoAddress + 8);
 			 ;

Architecture/i386/cpu/GlobalDescriptorTable.cpp

@@ -229,13 +229,9 @@ namespace GlobalDescriptorTable
 		gdt[Core].Entries->TaskStateSegment.BaseMiddle = uint8_t((Base >> 16) & 0xFF);
 		gdt[Core].Entries->TaskStateSegment.BaseHigh = uint8_t((Base >> 24) & 0xFF);
 
-#pragma diagnostic push
 #pragma GCC diagnostic ignored "-Wshift-count-overflow"
-
 		gdt[Core].Entries->TaskStateSegment.BaseUpper = s_cst(uint32_t, (Base >> 32) & 0xFFFFFFFF);
 
-#pragma diagnostic pop
-
 		gdt[Core].Entries->TaskStateSegment.Access = {.A = 1, .RW = 0, .DC = 0, .E = 1, .S = 0, .DPL = 0, .P = 1};
 		gdt[Core].Entries->TaskStateSegment.Granularity = (0 << 4) | ((Limit >> 16) & 0xF);
 
@@ -259,7 +255,7 @@ namespace GlobalDescriptorTable
 
 	SafeFunction void SetKernelStack(void *Stack)
 	{
-		long CPUID = GetCurrentCPU()->ID;
+		stub;
 	}
 
 	void *GetKernelStack() { return (void *)nullptr; }

Core/Crash/UserHandler.cpp

@@ -231,6 +231,10 @@ SafeFunction void UserModeExceptionHandler(CHArchTrapFrame *Frame)
 
         error("An exception occurred at %#lx by %#lx", CrashHandler::PageFaultAddress, Frame->rip);
 #elif defined(a32)
+        CheckPageFaultAddress = CrashHandler::PageFaultAddress;
+        if (CheckPageFaultAddress == 0)
+            CheckPageFaultAddress = Frame->eip;
+
         error("An exception occurred at %#lx by %#lx", CrashHandler::PageFaultAddress, Frame->eip);
 #elif defined(aa64)
 #endif

Core/Symbols.cpp

@@ -65,7 +65,7 @@ namespace SymbolResolver
 		Elf32_Word SymbolSize = 0;
 		// Elf32_Word StringSize = 0;
 #endif
-		int64_t TotalEntries = 0;
+		size_t TotalEntries = 0;
 
 		for (size_t i = 0; i < Num; ++i)
 		{
@@ -81,7 +81,7 @@ namespace SymbolResolver
 				// StringSize = (int)str->sh_size;
 				// TotalEntries = Section.sh_size / sizeof(Elf64_Sym)
 				TotalEntries = sym->sh_size / sym->sh_entsize;
-				debug("Symbol table found, %d entries",
+				trace("Symbol table found, %d entries",
 					  SymbolSize / sym->sh_entsize);
 				UNUSED(SymbolSize);
 				break;
@@ -90,8 +90,8 @@ namespace SymbolResolver
 
 		if (Symbols != nullptr && StringAddress != nullptr)
 		{
-			int64_t Index, MinimumIndex;
-			for (int64_t i = 0; i < TotalEntries - 1; i++)
+			size_t Index, MinimumIndex;
+			for (size_t i = 0; i < TotalEntries - 1; i++)
 			{
 				MinimumIndex = i;
 				for (Index = i + 1; Index < TotalEntries; Index++)
@@ -116,11 +116,11 @@ namespace SymbolResolver
 				return;
 			}
 
-			debug("Symbol table loaded, %d entries (%ld KiB)",
+			trace("Symbol table loaded, %d entries (%ld KiB)",
 				  TotalEntries, TO_KiB(TotalEntries * sizeof(SymbolTable)));
 			Elf_Sym *sym = nullptr;
 			const char *name = nullptr;
-			for (int64_t i = 0, g = TotalEntries; i < g; i++)
+			for (size_t i = 0, g = TotalEntries; i < g; i++)
 			{
 				sym = &Symbols[i];
 				name = (const char *)&StringAddress[Symbols[i].st_name];
@@ -168,7 +168,7 @@ namespace SymbolResolver
 		Elf_Shdr *ElfSections = (Elf_Shdr *)(ImageAddress + Header->e_shoff);
 		Elf_Sym *ElfSymbols = nullptr;
 		char *strtab = nullptr;
-		int64_t TotalEntries = 0;
+		size_t TotalEntries = 0;
 
 		for (uint16_t i = 0; i < Header->e_shnum; i++)
 		{
@@ -197,8 +197,8 @@ namespace SymbolResolver
 
 		if (ElfSymbols != nullptr && strtab != nullptr)
 		{
-			int64_t Index, MinimumIndex;
-			for (int64_t i = 0; i < TotalEntries - 1; i++)
+			size_t Index, MinimumIndex;
+			for (size_t i = 0; i < TotalEntries - 1; i++)
 			{
 				MinimumIndex = i;
 				for (Index = i + 1; Index < TotalEntries; Index++)
@@ -221,7 +221,7 @@ namespace SymbolResolver
 			/* TODO: maybe a checker for duplicated addresses? */
 			Elf_Sym *sym = nullptr;
 			const char *name = nullptr;
-			for (int64_t i = 0, g = TotalEntries; i < g; i++)
+			for (size_t i = 0, g = TotalEntries; i < g; i++)
 			{
 				sym = &ElfSymbols[i];
 				name = &strtab[ElfSymbols[i].st_name];

Core/Video/Font.cpp

@@ -23,7 +23,7 @@ namespace Video
 {
     Font::Font(uintptr_t *Start, uintptr_t *End, FontType Type)
     {
-        trace("Initializing font with start %#llx and end %#llx Type: %d", Start, End, Type);
+        trace("Initializing font with start %#lx and end %#lx Type: %d", Start, End, Type);
         this->Info.StartAddress = Start;
         this->Info.EndAddress = End;
         this->Info.Type = Type;

SystemCalls/Linux/Linux.cpp

@@ -1056,7 +1056,32 @@ uintptr_t HandleLinuxSyscalls(SyscallsFrame *Frame)
 	return call(Frame->rdi, Frame->rsi, Frame->rdx,
 				Frame->r10, Frame->r8, Frame->r9);
 #elif defined(a32)
-	return 0;
+	if (Frame->eax > sizeof(LinuxSyscallsTable) / sizeof(SyscallData))
+	{
+		fixme("Syscall %d not implemented",
+			  Frame->eax);
+		return -ENOSYS;
+	}
+
+	SyscallData Syscall = LinuxSyscallsTable[Frame->eax];
+
+	long (*call)(long, ...) = r_cst(long (*)(long, ...),
+									Syscall.Handler);
+
+	if (unlikely(!call))
+	{
+		fixme("Syscall %s(%d) not implemented.",
+			  Syscall.Name, Frame->eax);
+		return -ENOSYS;
+	}
+
+	debug("[%d:\"%s\"]->( %#lx  %#lx  %#lx  %#lx  %#lx  %#lx )",
+		  Frame->eax, Syscall.Name,
+		  Frame->ebx, Frame->ecx, Frame->edx,
+		  Frame->esi, Frame->edi, Frame->ebp);
+
+	return call(Frame->ebx, Frame->ecx, Frame->edx,
+				Frame->esi, Frame->edi, Frame->ebp);
 #elif defined(aa64)
 	return 0;
 #endif

SystemCalls/Native.cpp

@@ -701,7 +701,44 @@ uintptr_t HandleNativeSyscalls(SysFrm *Frame)
 				Frame->rdi, Frame->rsi, Frame->rdx,
 				Frame->r10, Frame->r8, Frame->r9);
 #elif defined(a32)
-	return -ENOSYS;
+	if (unlikely(Frame->eax > sys_MaxSyscall))
+	{
+		fixme("Syscall %ld not implemented.", Frame->eax);
+		return -ENOSYS;
+	}
+
+	SyscallData Syscall = NativeSyscallsTable[Frame->eax];
+
+	uintptr_t (*call)(SysFrm *, uintptr_t, ...) =
+		r_cst(uintptr_t(*)(SysFrm *, uintptr_t, ...),
+			  Syscall.Handler);
+
+	if (unlikely(!call))
+	{
+		error("Syscall %s(%d) not implemented.",
+			  Syscall.Name, Frame->eax);
+		return -ENOSYS;
+	}
+
+	int euid = thisProcess->Security.Effective.UserID;
+	int egid = thisProcess->Security.Effective.GroupID;
+	int reqID = Syscall.RequiredID;
+	if (euid > reqID || egid > reqID)
+	{
+		warn("Process %s(%d) tried to access a system call \"%s\" with insufficient privileges.",
+			 thisProcess->Name, thisProcess->ID, Syscall.Name);
+		debug("Required: %d; Effective u:%d, g:%d", reqID, euid, egid);
+		return -EPERM;
+	}
+
+	debug("[%d:\"%s\"]->( %#x  %#x  %#x  %#x  %#x  %#x )",
+		  Frame->eax, Syscall.Name,
+		  Frame->ebx, Frame->ecx, Frame->edx,
+		  Frame->esi, Frame->edi, Frame->ebp);
+
+	return call(Frame,
+				Frame->ebx, Frame->ecx, Frame->edx,
+				Frame->esi, Frame->edi, Frame->ebp);
 #elif defined(aa64)
 	return -ENOSYS;
 #endif