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add rewrite header function

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fully rewrite the header from commands list
This commit is contained in:
nganhkhoa 2024-08-22 17:39:31 +07:00
parent 5e601eaa4a
commit 9b85e4938f
1 changed files with 23 additions and 0 deletions
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23
macho-go/pkg/ios/macho/edit.go
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@ -194,6 +194,29 @@ func (mc *MachoContext) RemoveUnnecessaryInfo() bool {
return false
}
func (mc *MachoContext) RewriteHeader() {
var offset uint64
var start uint64
if mc.Is64bit() {
start = Header_size_64
} else {
start = Header_size
}
mc.file.Seek(0, io.SeekStart)
offset = start
for _, cmd := range mc.commands {
nwrite, _ := mc.file.WriteAt(cmd.Serialize(mc), int64(offset))
offset += uint64(nwrite)
}
mc.header.ncmds = uint32(len(mc.commands))
mc.header.sizeofcmds = uint32(offset - start)
mc.file.WriteAt(mc.header.Serialize(mc), 0)
}
func (mc *MachoContext) AddLoadCmd(lcmd LoadCommand) {
var offset uint64
payload := lcmd.Serialize(mc)