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collect rebase symbols

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This commit is contained in:
nganhkhoa 2024-08-26 15:59:30 +07:00
parent 9b2796b2a1
commit 04979b0afd
1 changed files with 21 additions and 2 deletions
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23
macho-go/pkg/ios/macho/dyld_info.go
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@ -27,6 +27,9 @@ type ImportSymbol struct {
file_address uint64 file_address uint64
lib_ordinal uint32 lib_ordinal uint32
target uint32
high8 uint32
// push number // push number
pnum uint32 pnum uint32
stub uint64 stub uint64
@ -122,8 +125,9 @@ func (mc *MachoContext) CollectBindSymbolsModern() []*ImportSymbol {
if status == 3 { if status == 3 {
continue continue
} }
// fmt.Printf("segment=%x format=%x page_count=%d\n", fix.segment, fix.format, fix.page_count)
// fmt.Printf("pages=%x\n", fix.pages) fmt.Printf("segment=%x format=%x page_count=%d\n", fix.segment, fix.format, fix.page_count)
pages := ([]C.ushort)(unsafe.Slice(fix.pages, fix.page_count)) pages := ([]C.ushort)(unsafe.Slice(fix.pages, fix.page_count))
reader := bytes.NewReader(mc.buf) reader := bytes.NewReader(mc.buf)
for page_i := 0; page_i < int(fix.page_count); page_i++ { for page_i := 0; page_i < int(fix.page_count); page_i++ {
@ -132,6 +136,8 @@ func (mc *MachoContext) CollectBindSymbolsModern() []*ImportSymbol {
address := int64(fix.segment) + int64(page_i) * int64(fix.page_size) + int64(pages[page_i]) address := int64(fix.segment) + int64(page_i) * int64(fix.page_size) + int64(pages[page_i])
reader.Seek(address, io.SeekStart) reader.Seek(address, io.SeekStart)
fmt.Printf(" page %d offset=%x\n", page_i, address)
code := make([]byte, 8) code := make([]byte, 8)
for { for {
@ -141,6 +147,10 @@ func (mc *MachoContext) CollectBindSymbolsModern() []*ImportSymbol {
var bind C.int var bind C.int
var ret1 C.ulonglong var ret1 C.ulonglong
var ret2 C.ulonglong var ret2 C.ulonglong
if (fix.format != 2 && fix.format != 6) {
fmt.Printf("format is %d\n", fix.format)
}
next := C.ParseFixValue(C.int(fix.format), C.ulonglong(v), next := C.ParseFixValue(C.int(fix.format), C.ulonglong(v),
&bind, &ret1, &ret2) &bind, &ret1, &ret2)
@ -164,6 +174,14 @@ func (mc *MachoContext) CollectBindSymbolsModern() []*ImportSymbol {
syms = append(syms, &new_sym) syms = append(syms, &new_sym)
} else { } else {
fmt.Printf("// 0x%x rebase=%d target=0x%x high8=0x%x\n", address, bind, ret1, ret2) fmt.Printf("// 0x%x rebase=%d target=0x%x high8=0x%x\n", address, bind, ret1, ret2)
sym.typ = "rebase"
sym.target = uint32(ret1)
sym.high8 = uint32(ret2)
sym.segment = uint32(mc.findSegmentIndexAt(uint64(address)))
sym.file_address = uint64(address)
sym.next = int(next)
new_sym := sym
syms = append(syms, &new_sym)
} }
if int(next) == 0 { if int(next) == 0 {
@ -176,6 +194,7 @@ func (mc *MachoContext) CollectBindSymbolsModern() []*ImportSymbol {
reader.Seek(0, io.SeekStart) reader.Seek(0, io.SeekStart)
} }
} }
fmt.Printf("number of imports %d\n", len(syms))
return syms return syms
} }