.

pkg/pclntab/rtcorrupt_unsafe.go

@@ -0,0 +1,35 @@
+//go:build darwin || linux
+
+package pclntab
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+// mprotectRW makes a memory region read-write using an unsafe.Pointer conversion
+// from a page-aligned uintptr. This is intentional for runtime memory manipulation.
+//
+//go:nosplit
+func mprotectRW(addr uintptr, size uintptr) error {
+	p := *(*unsafe.Pointer)(unsafe.Pointer(&addr))
+	return syscall.Mprotect(
+		unsafe.Slice((*byte)(p), size),
+		syscall.PROT_READ|syscall.PROT_WRITE,
+	)
+}
+
+//go:nosplit
+func mprotectRO(addr uintptr, size uintptr) {
+	p := *(*unsafe.Pointer)(unsafe.Pointer(&addr))
+	_ = syscall.Mprotect(
+		unsafe.Slice((*byte)(p), size),
+		syscall.PROT_READ,
+	)
+}
+
+//go:nosplit
+func ptrToSlice(addr uintptr, size uintptr) []byte {
+	p := *(*unsafe.Pointer)(unsafe.Pointer(&addr))
+	return unsafe.Slice((*byte)(p), size)
+}