Errors due to mapped memory

[derekselander]

Errors due to mapped memory

[ynyyn]

If you use macOS Monterey (12)+, try to run the old released dsdump (dsdump_compiled.zip, 1a8857e) with env MallocNanoZone=0, it should work to some degree.

$ MallocNanoZone=0 dsdump --objc dsdump

For details, see my comment at #35 (comment).

[DerekSelander]

How I wrote dsdump, I'll mmap the executable into memory, but I needed a way to ensure I don't mix up the load addresses of the binary with dsdump's own address space. I chose 0x400000000 as a place where not a lot of code lives. You can submit a fix via a PR, modify this location if you were to build yourself, or give me the jtool -l of the executable and wait till early 2022 when I should have enough free time to get an updated version of this tool out.

[duraki]

Hey @ynyyn thanks for the PR! I can confirm your build works fine on x86_64bit Mac architecture:

MallocNanoZone=0 dsdump -s /Applications/x.app/Contents/MacOS/x -a x86_64 | more
 protocol x.NoteEditorViewControllerDelegate // 3 requirements
 protocol x.TransitionHandler // 1 requirements
 protocol x.StateDismissible // 7 requirements
 protocol x.ApplePencilDetectorUsing // 1 requirements

[erikng]

jtool -l -arch x86_64 ./dsdump_beta/dsdump
LC 00: LC_SEGMENT_64          Mem: 0x000000000-0x100000000	__PAGEZERO
LC 01: LC_SEGMENT_64          Mem: 0x100000000-0x10039c000	__TEXT
	Mem: 0x100003ed0-0x10014c1e2		__TEXT.__text	(Normal)
	Mem: 0x10014c1e2-0x10014c58a		__TEXT.__stubs	(Symbol Stubs)
	Mem: 0x10014c58c-0x10014cace		__TEXT.__stub_helper	(Normal)
	Mem: 0x10014cace-0x10014e059		__TEXT.__objc_methname	(C-String Literals)
	Mem: 0x10014e060-0x10016d5a9		__TEXT.__cstring	(C-String Literals)
	Mem: 0x10016d5a9-0x10016d645		__TEXT.__objc_classname	(C-String Literals)
	Mem: 0x10016d645-0x10016ea23		__TEXT.__objc_methtype	(C-String Literals)
	Mem: 0x10016ea30-0x1003988ff		__TEXT.__const
	Mem: 0x100398900-0x10039a6fc		__TEXT.__gcc_except_tab
	Mem: 0x10039a700-0x10039a754		__TEXT.__catfarts
	Mem: 0x10039a754-0x10039bff4		__TEXT.__unwind_info
LC 02: LC_SEGMENT_64          Mem: 0x10039c000-0x100558000	__DATA
	Mem: 0x10039c000-0x10039c008		__DATA.__nl_symbol_ptr	(Non-Lazy Symbol Ptrs)
	Mem: 0x10039c008-0x10039c0c8		__DATA.__got	(Non-Lazy Symbol Ptrs)
	Mem: 0x10039c0c8-0x10039c5a8		__DATA.__la_symbol_ptr	(Lazy Symbol Ptrs)
	Mem: 0x10039c5a8-0x10039c5e0		__DATA.__mod_init_func	(Module Init Function Ptrs)
	Mem: 0x10039c5e0-0x1003eb630		__DATA.__const
	Mem: 0x1003eb630-0x1003eb8f0		__DATA.__cfstring
	Mem: 0x1003eb8f0-0x1003eb908		__DATA.__objc_classlist	(Normal)
	Mem: 0x1003eb908-0x1003eb920		__DATA.__objc_catlist	(Normal)
	Mem: 0x1003eb920-0x1003eb930		__DATA.__objc_nlcatlist	(Normal)
	Mem: 0x1003eb930-0x1003eb940		__DATA.__objc_protolist
	Mem: 0x1003eb940-0x1003eb948		__DATA.__objc_imageinfo
	Mem: 0x1003eb948-0x1003ed318		__DATA.__objc_const
	Mem: 0x1003ed318-0x1003ed748		__DATA.__objc_selrefs	(Literal Pointers)
	Mem: 0x1003ed748-0x1003ed7a8		__DATA.__objc_classrefs	(Normal)
	Mem: 0x1003ed7a8-0x1003ed7c0		__DATA.__objc_superrefs	(Normal)
	Mem: 0x1003ed7c0-0x1003ed940		__DATA.__objc_ivar
	Mem: 0x1003ed940-0x1003edd50		__DATA.__objc_data
	Mem: 0x1003edd50-0x100455d10		__DATA.__data
	Mem: 0x100455d10-0x1005566f9		__DATA.__bss	(Zero Fill)
	Mem: 0x100556700-0x1005568e2		__DATA.__common	(Zero Fill)
LC 03: LC_SEGMENT_64          Mem: 0x100558000-0x100664000	__LINKEDIT
LC 04: LC_DYLD_INFO
LC 05: LC_SYMTAB
	Symbol table is at offset 0x45efa8 (4583336), 23916 entries
	String table is at offset 0x4bcbb0 (4967344), 622608 bytes
LC 06: LC_DYSYMTAB
	23296 local symbols at index     0
	  442 external symbols at index  23296
	  178 undefined symbols at index 23738
	   No TOC
	   No modtab
	  337 Indirect symbols at offset 0x4bc668

LC 07: LC_LOAD_DYLINKER      	/usr/lib/dyld
LC 08: LC_UUID               	UUID: 2956F9CE-0A8F-30EA-A2E9-5CEF800AD98D
LC 09: LC_BUILD_VERSION      	Build Version:           Platform: MacOS 10.14.0
LC 10: LC_SOURCE_VERSION     	Source Version:          0.0.0.0.0
LC 11: LC_MAIN               	Entry Point:             0x1b754 (Mem: 0x10001b754)
LC 12: LC_LOAD_WEAK_DYLIB    	/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
LC 13: LC_LOAD_DYLIB         	/usr/lib/libobjc.A.dylib
LC 14: LC_LOAD_DYLIB         	/usr/lib/libc++.1.dylib
LC 15: LC_LOAD_DYLIB         	/usr/lib/libSystem.B.dylib
LC 16: LC_LOAD_WEAK_DYLIB    	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
LC 17: LC_RPATH              	@executable_path/../Frameworks
LC 18: LC_RPATH              	@loader_path/../Frameworks
LC 19: LC_FUNCTION_STARTS    	Offset: 4577120, Size: 5200 (0x45d760-0x45ebb0)
LC 20: LC_DATA_IN_CODE       	Offset: 4582320, Size: 1016 (0x45ebb0-0x45efa8)
LC 21: LC_CODE_SIGNATURE     	Offset: 5589952, Size: 62432 (0x554bc0-0x563fa0)