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small changes to remove imports action

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This commit is contained in:
nganhkhoa 2023-07-11 10:05:58 +07:00
parent eccd0bf845
commit 557eed0254
3 changed files with 15 additions and 7 deletions
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2
macho-go/internal/wrapper/action/remove_imports.go
View File

@ -8,8 +8,6 @@ type removeImports struct{}
func (action *removeImports) withMacho(mf *MachoFile) error {
mf.Context().RemoveBindSymbols()
mf.Context().RemoveSymbolTable()
mf.Context().RemoveExportTrie()
return nil
}

15
macho-go/pkg/ios/macho/dyld_info.go
View File

@ -25,6 +25,7 @@ type ImportSymbol struct {
segment_offset uint32
address uint64
file_address uint64
lib_ordinal uint32
// push number
pnum uint32
@ -45,6 +46,10 @@ func (sym *ImportSymbol) Dylib() string {
return sym.dylib
}
func (sym *ImportSymbol) LibOrdinal() uint32 {
return sym.lib_ordinal
}
func (sym *ImportSymbol) Address() uint64 {
return sym.address
}
@ -116,16 +121,17 @@ func (mc *MachoContext) CollectBindSymbolsModern() []*ImportSymbol {
// fmt.Printf("segment=%x format=%x page_count=%d\n", fix.segment, fix.format, fix.page_count)
// fmt.Printf("pages=%x\n", fix.pages)
pages := ([]C.ushort)(unsafe.Slice(fix.pages, fix.page_count))
reader := bytes.NewReader(mc.buf)
for page_i := 0; page_i < int(fix.page_count); page_i++ {
// fmt.Printf(" page offset=%x\n", pages[page_i])
address := int64(fix.segment) + int64(pages[page_i])
mc.file.Seek(address, io.SeekStart)
reader.Seek(address, io.SeekStart)
code := make([]byte, 8)
for {
mc.file.Read(code)
reader.Read(code)
v := mc.byteorder.Uint64(code)
var bind C.int
@ -145,6 +151,7 @@ func (mc *MachoContext) CollectBindSymbolsModern() []*ImportSymbol {
sym.name = name
sym.dylib = dylib
sym.typ = "lazy"
sym.lib_ordinal = uint32(s.lib_ordinal)
sym.segment = uint32(mc.findSegmentIndexAt(uint64(address)))
sym.file_address = uint64(address)
@ -160,9 +167,9 @@ func (mc *MachoContext) CollectBindSymbolsModern() []*ImportSymbol {
}
// because the pointer move up 8 bytes already so we minus 8
address += int64(next * 4)
mc.file.Seek(int64(next*4)-8, io.SeekCurrent)
reader.Seek(int64(next*4)-8, io.SeekCurrent)
}
mc.file.Seek(0, io.SeekStart)
reader.Seek(0, io.SeekStart)
}
}
return syms

5
macho-go/pkg/ios/macho/edit.go
View File

@ -282,7 +282,10 @@ func (mc *MachoContext) RemoveBindSymbols() {
} else {
mc.removeBindSymbolsLegacy()
}
mc.ReworkForObjc()
// Objective-C stub replaces main which can only appears in executable
if mc.Header().IsExecutable() {
mc.ReworkForObjc()
}
// due to some limitations when design this tool
// we write the c code to stdout lol