runtime: split syscall functions for darwin changes for 1.26

src/runtime/os_darwin_go125.go

@@ -0,0 +1,70 @@
+//go:build darwin && !go1.26
+
+package runtime
+
+// Call "system calls" (actually: libc functions) in a special way.
+//   - Most calls calls return a C int (which is 32-bits), and -1 on failure.
+//   - syscallX* is for functions that return a 64-bit integer (and also return
+//     -1 on failure).
+//   - syscallPtr is for functions that return a pointer on success or NULL on
+//     failure.
+//   - rawSyscall seems to avoid some stack modifications, which isn't relevant
+//     to TinyGo.
+
+//go:linkname syscall_syscall syscall.syscall
+func syscall_syscall(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
+	// For TinyGo we don't need to do anything special to call C functions.
+	return syscall_rawSyscall(fn, a1, a2, a3)
+}
+
+//go:linkname syscall_rawSyscall syscall.rawSyscall
+func syscall_rawSyscall(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
+	result := call_syscall(fn, a1, a2, a3)
+	r1 = uintptr(result)
+	if result == -1 {
+		// Syscall returns -1 on failure.
+		err = uintptr(*libc_errno_location())
+	}
+	return
+}
+
+//go:linkname syscall_syscallX syscall.syscallX
+func syscall_syscallX(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
+	r1 = call_syscallX(fn, a1, a2, a3)
+	if int64(r1) == -1 {
+		// Syscall returns -1 on failure.
+		err = uintptr(*libc_errno_location())
+	}
+	return
+}
+
+//go:linkname syscall_syscallPtr syscall.syscallPtr
+func syscall_syscallPtr(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
+	r1 = call_syscallX(fn, a1, a2, a3)
+	if r1 == 0 {
+		// Syscall returns a pointer on success, or NULL on failure.
+		err = uintptr(*libc_errno_location())
+	}
+	return
+}
+
+//go:linkname syscall_syscall6 syscall.syscall6
+func syscall_syscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
+	result := call_syscall6(fn, a1, a2, a3, a4, a5, a6)
+	r1 = uintptr(result)
+	if result == -1 {
+		// Syscall returns -1 on failure.
+		err = uintptr(*libc_errno_location())
+	}
+	return
+}
+
+//go:linkname syscall_syscall6X syscall.syscall6X
+func syscall_syscall6X(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
+	r1 = call_syscall6X(fn, a1, a2, a3, a4, a5, a6)
+	if int64(r1) == -1 {
+		// Syscall returns -1 on failure.
+		err = uintptr(*libc_errno_location())
+	}
+	return
+}