Some updates.
If I force it to rely on 32b arch instead of 64b, it starts to be better:
3222823425 match ioctl calls for BINDER_WRITE_READ over 32bits
I/hook-ioctl: ioctl.cmd: 3222823425
> I/hook-ioctl: ioctl.cmd binary: 11000000000110000110001000000001
> I/hook-ioctl: direction: rw, struct size: 24, type: b, number: 1
> I/hook-ioctl: wait for: 3224396289 or 3222823425
> I/hook-ioctl: data @: 2934048664
> I/hook-ioctl: write.s : 52
> I/hook-ioctl: write.c : 0
> I/hook-ioctl: write.buffer @: 2928146944
>
if I inspect write buffer (as here I want to check calls made to service),I
also start to get what is expected
> ioctl.cmd: 1076388608
> direction: -w, struct size: 40, type: c, number: 0
>
But if I parse (at ptr + 4) the data and try to convert to
binder_transaction_data, I start to get really strange things
a) over the memory, I would have expected a different position for +4 and
+8 etc
b) when parsing, the data are just ... totally different from memory
struct binder_transaction_data32 btd32 = *(struct binder_transaction_data32
*) (cptr);
LOGI("-4: %zu", *(cptr-4)); //here I got back the cmd value, so that is okay
LOGI("+0: %zu", *(cptr));
LOGI("+4: %zu", *(cptr+4));
I/hook-ioctl: +0: 17
> I/hook-ioctl: +4: 0
> I/hook-ioctl: +8: 0
> I/hook-ioctl: +12: 2739913840
> I/hook-ioctl: +16: 2739913840
> I/hook-ioctl: +20: 1076388608
> I/hook-ioctl: +24: 16
> I/hook-ioctl: +28: 0
> I/hook-ioctl: +32: 1141280749
> I/hook-ioctl: +36: 1141898661
>
> I/hook-ioctl: cookie: 0
> I/hook-ioctl: code: 0
> I/hook-ioctl: flags: 80
> I/hook-ioctl: pid: 0
> I/hook-ioctl: euid: 3022204288
> I/hook-ioctl: data_size: 0
>
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