init: Fix a few errors

This defeated the point of passing the page tables to init, since rsi would be set to zero anyway.

core/src/arch/x86_64/thread.zig

@@ -14,7 +14,6 @@ pub inline fn enterTask(regs: *interrupts.InterruptStackFrame, comptime base: u6
         \\ mov $0, %rbx
         \\ mov $0, %rcx
         \\ mov $0, %rdx
-        \\ mov $0, %rsi
         \\ mov $0, %rbp
         \\ mov $0, %r8
         \\ mov $0, %r9
@@ -31,7 +30,8 @@ pub inline fn enterTask(regs: *interrupts.InterruptStackFrame, comptime base: u6
           [rflags] "r" (regs.rflags),
           [cs] "r" (regs.cs),
           [rip] "r" (regs.rip),
-          [arg] "{rdi}" (regs.rdi),
+          [arg0] "{rdi}" (regs.rdi),
+          [arg1] "{rsi}" (regs.rsi),
           [base] "r" (base),
           [directory] "r" (directory),
     );

system/init/arch/x86_64/vm.zig

@@ -15,7 +15,8 @@ const PhysFrame = struct {
     }
 
     pub fn virtualPointer(self: *const PhysFrame, comptime T: type, base: usize) *T {
-        return @ptrFromInt(self.virtualAddress(base));
+        const virt = self.virtualAddress(base);
+        return @ptrFromInt(virt);
     }
 };
 
@@ -107,7 +108,7 @@ fn setUpParentPageTableEntry(mapper: *const MemoryMapper, pte: *PageTableEntry,
         const frame = PhysFrame{ .address = try kernel.allocFrame() };
         pte.present = 1;
         pte.setAddress(frame.address);
-        getTable(pte, mapper.base).* = std.mem.zeroes(PageDirectory);
+        getTable(mapper, pte).* = std.mem.zeroes(PageDirectory);
     }
     if (hasFlag(flags, Flags.ReadWrite) == 1) pte.read_write = 1;
     if (hasFlag(flags, Flags.User) == 1) pte.user = 1;

system/init/main.zig

@@ -8,7 +8,13 @@ export fn _start(base: u64, address: u64) callconv(.C) noreturn {
     kernel.print(address);
     kernel.print(@intFromPtr(mapper.directory));
 
-    vm.map(&mapper, 0x6000000, kernel.allocFrame(), @intFromEnum(vm.Flags.ReadWrite) | @intFromEnum(vm.Flags.User));
+    const phys = kernel.allocFrame() catch {
+        while (true) {}
+    };
+
+    vm.map(&mapper, 0x6000000, .{ .address = phys }, @intFromEnum(vm.Flags.ReadWrite) | @intFromEnum(vm.Flags.User)) catch {
+        while (true) {}
+    };
 
     var counter: u64 = 0;