Improved documentation

README.md

@@ -18,7 +18,7 @@ go build
 
 ## Usage
 
-Build a Linux x86-64 ELF executable from `examples/hello` and run it:
+Build an executable from `examples/hello` and run it:
 
 ```shell
 ./q run examples/hello

lib/sys/sys_windows.q

@@ -1,7 +1,14 @@
 write(_ Int, _ Pointer, _ Int) -> Int {
+	// WriteFile(fd, buffer, length, out numberOfBytesWritten, out overlapped)
+	return 0
+}
+
+mmap(_ Int, _ Int, _ Int, _ Int) -> Pointer {
+	// VirtualAlloc(address, length, flags, protection)
 	return 0
 }
 
 exit(_ Int) {
+	// ExitProcess(code)
 	return
 }

src/exe/pe/pe.md

@@ -13,6 +13,8 @@ importing a few core functions from "kernel32.dll".
 The section where the DLL function pointers are stored does not need to be marked as writable.
 The Windows executable loader resolves the pointers before they are loaded into memory.
 
+The stack must be 16 byte aligned before a DLL function is called.
+
 ## Links
 
 - https://learn.microsoft.com/en-us/windows/win32/debug/pe-format