Mach-O arm64 accessing .data seciont

Question

now that Apple's platforms finally made a decision about architectures, I am starting to learn arm64 assembly on Darwin, and I don't find any information how to load addresses in the .data section.

On Linux, this works:

ldr X1, =symbol

.data
symbol:      .ascii  "foo"

Apple has an article why this does not work for Mach-O binaries, and how it is done on x86 with @GOTPCREL, but that does not tell me how the Clang assembler handles this on Apple Silicon. (Putting the data into the .text section does not help, because I need it to be writable)

Any information is appreciated!

I tried that, the disassembly was half helpful. See my solution below — below, Jul 06 '20 at 22:23
Check the answer here https://stackoverflow.com/questions/56985859/ios-arm64-syscalls/57092866#57092866 for some examples — Kamil.S, Jul 07 '20 at 09:20

score 0 · Answer 1 · answered Jul 06 '20 at 12:29

0

It would appear that I need to use ADRP Rx, symbol@GOTPAGE. Still, any more insight is appreciated

answered Jul 06 '20 at 12:29

below

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Mach-O arm64 accessing .data seciont

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