Il 06/01/24 20:43, Sergey Bugaev ha scritto:
On Sat, Jan 6, 2024 at 10:26 PM Luca <l...@orpolo.org> wrote:
Uhm, I still have an issue, although a bit different now:

By the way, the exception is still the same (General Protection, which
is usually forwarded to user space), but for a different reason,
apparently a non-canonical address in $rax=0x8000020175c0

I think this is just that you now have to add 2, not 1, to the result
of __builtin_frame_address().

Or better, do what I did in glibc, change it to an explicit function
argument [0], since __builtin_frame_address() doesn't return a useful
(for this purpose) value on aarch64.

[0]: 
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=24b707c1665afae7eb302542ffa92d53aa577111

great, this works :)
Thanks!


Luca


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