fix: handle macho file with chained fixup

file.go

@@ -29,6 +29,9 @@ import (
 	"path"
 	"sort"
 	"sync"
+
+	macho2 "github.com/blacktop/go-macho"
+	"github.com/blacktop/go-macho/pkg/fixupchains"
 )
 
 var (
@@ -416,6 +419,16 @@ func (f *GoFile) PCLNTab() (*gosym.Table, error) {
 		// Since the moduledata starts with the address to the pclntab, we can use this to find the moduledata structure.
 		runtimeText, err := f.findRuntimeText(textStart, textStart+uint64(len(textData)), f.pclntabAddr, moddataSection)
 		if err != nil {
+			if f.FileInfo.OS == "macOS" && f.FileInfo.Arch == ArchARM64 {
+				t, err := f.findRuntimeTextMachoChainedFixups(f.pclntabAddr)
+				if err != nil {
+					f.pclntabError = fmt.Errorf("failed to find runtime.text symbol: %w", err)
+					return
+				}
+				f.runtimeText = t
+				return
+			}
+
 			f.pclntabError = fmt.Errorf("failed to find runtime.text symbol: %w", err)
 			return
 		}
@@ -428,6 +441,45 @@ func (f *GoFile) PCLNTab() (*gosym.Table, error) {
 	return gosym.NewTable(make([]byte, 0), gosym.NewLineTable(f.pclntabBytes, f.runtimeText))
 }
 
+func (f *GoFile) findRuntimeTextMachoChainedFixups(pclntabAddr uint64) (uint64, error) {
+	of := f.fh.getFile()
+	_, err := of.Seek(0, io.SeekStart)
+	if err != nil {
+		return 0, err
+	}
+
+	f2, err := macho2.NewFile(of)
+	if err != nil {
+		return 0, err
+	}
+	fixups, err := f2.DyldChainedFixups()
+	if err != nil {
+		return 0, err
+	}
+	baseAddr := f2.GetBaseAddress()
+	var rebases []fixupchains.Rebase
+	for _, start := range fixups.Starts {
+		rebases = append(rebases, start.Rebases()...)
+	}
+
+	// First, we need to find the start of the moduledata
+	var moduledataAddr uint64
+	for _, rb := range rebases {
+		if rb.Target()+baseAddr == pclntabAddr {
+			moduledataAddr = baseAddr + rb.Offset()
+			break
+		}
+	}
+	// then, find field 22
+	addr22 := moduledataAddr + 22*8
+	for _, rb := range rebases {
+		if rb.Offset()+baseAddr == addr22 {
+			return baseAddr + rb.Target(), nil
+		}
+	}
+	return 0, fmt.Errorf("failed to find runtime.text symbol")
+}
+
 func (f *GoFile) findRuntimeText(textStart, textEnd, pclntabAddr uint64, modSectiondata []byte) (uint64, error) {
 	var text, etext uint64
 	magic := buildPclnTabAddrBinary(f.FileInfo.WordSize, f.FileInfo.ByteOrder, pclntabAddr)

go.mod

@@ -3,6 +3,7 @@ module github.com/goretk/gore
 go 1.21
 
 require (
+	github.com/blacktop/go-macho v1.1.232
 	github.com/go-git/go-git/v5 v5.11.0
 	github.com/stretchr/testify v1.8.4
 	golang.org/x/arch v0.7.0
@@ -12,6 +13,7 @@ require (
 	dario.cat/mergo v1.0.0 // indirect
 	github.com/Microsoft/go-winio v0.6.1 // indirect
 	github.com/ProtonMail/go-crypto v1.0.0 // indirect
+	github.com/blacktop/go-dwarf v1.0.10 // indirect
 	github.com/cloudflare/circl v1.3.7 // indirect
 	github.com/cyphar/filepath-securejoin v0.2.4 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect

go.sum

@@ -9,6 +9,10 @@ github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFI
 github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
+github.com/blacktop/go-dwarf v1.0.10 h1:i9zYgcIROETsNZ6V+zZn3uDH21FCG5BLLZ837GitxS0=
+github.com/blacktop/go-dwarf v1.0.10/go.mod h1:4W2FKgSFYcZLDwnR7k+apv5i3nrau4NGl9N6VQ9DSTo=
+github.com/blacktop/go-macho v1.1.232 h1:9spphgi1rVnhW1HnBXaPaa75t1Rb1FlgL27IUHEYWSc=
+github.com/blacktop/go-macho v1.1.232/go.mod h1:dtlW2AJKQpFzImBVPWiUKZ6OxrQ2MLfWi/BPPe0EONE=
 github.com/bwesterb/go-ristretto v1.2.3/go.mod h1:fUIoIZaG73pV5biE2Blr2xEzDoMj7NFEuV9ekS419A0=
 github.com/cloudflare/circl v1.3.3/go.mod h1:5XYMA4rFBvNIrhs50XuiBJ15vF2pZn4nnUKZrLbUZFA=
 github.com/cloudflare/circl v1.3.7 h1:qlCDlTPz2n9fu58M0Nh1J/JzcFpfgkFHHX3O35r5vcU=