proc: fix PIE support on macOS (#3467)

Go1.22 switched to emitting PIE by default and also changed some
details of the PIE implementation. This breaks delve entirely on macOS.

Fix how relocations are handled on macOS.

pkg/proc/bininfo.go

@@ -1805,11 +1805,17 @@ func loadBinaryInfoMacho(bi *BinaryInfo, image *Image, path string, entryPoint u
 	}
 
 	if entryPoint != 0 {
-		// This is a little bit hacky. We use the entryPoint variable, but it
-		// actually holds the address of the mach-o header. We can use this
-		// to calculate the offset to the non-aslr location of the mach-o header
-		// (which is 0x100000000)
-		image.StaticBase = entryPoint - 0x100000000
+		machoOff := uint64(0x100000000)
+		for _, ld := range exe.Loads {
+			if seg, _ := ld.(*macho.Segment); seg != nil {
+				if seg.Name == "__TEXT" {
+					machoOff = seg.Addr
+					break
+				}
+			}
+		}
+		logflags.DebuggerLogger().Debugf("entryPoint %#x machoOff %#x", entryPoint, machoOff)
+		image.StaticBase = entryPoint - machoOff
 	}
 
 	image.closer = exe

pkg/proc/gdbserial/gdbserver.go

@@ -662,7 +662,7 @@ func LLDBAttach(pid int, path string, waitFor *proc.WaitFor, debugInfoDirs []str
 // debugging PIEs.
 func (p *gdbProcess) EntryPoint() (uint64, error) {
 	var entryPoint uint64
-	if p.bi.GOOS == "darwin" && p.bi.Arch.Name == "arm64" {
+	if p.bi.GOOS == "darwin" {
 		// There is no auxv on darwin, however, we can get the location of the mach-o
 		// header from the debugserver by going through the loaded libraries, which includes
 		// the exe itself