RANDOM.C and use of asm ("RDTSC" : "=A" (result)) FAILS on ARM

[LittleDuke]

in "lib/random.c" on line 146

asm ("RDTSC" : "=A" (result));

Does not compile on ARM/ARM64 based Raspberry PI computers for obvious reasons.

A better more cross-platform compatible approach would be to support something like "rng-tools"

https://wiki.archlinux.org/index.php/Rng-tools

[Minege]

Hi @LittleDuke,
Can you try to again on your Raspberry Pi, but install the library like this instead:
pip install git+https://github.com/Minege/eSSP.git@update ?

[LittleDuke]

I solved the problem by reading from /dev/urandom Can upload patch

…

-dvd

On Mar 2, 2019, at 13:46, Minege ***@***.***> wrote: Hi @LittleDuke <https://github.com/LittleDuke>, Can you try to again on your Raspberry Pi, but install the library like this instead: pip install ***@***.*** ? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#12 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABVmlYUCyk-TMj4rnWWBNpoRKzIz2NKwks5vStUVgaJpZM4WYP1D>.

[ymaktepi]

Hi @LittleDuke

I'd be interested in seeing your patch as I'm currently running into the same issue. Would you be kind enough to create a PR if you still have the updated code around? Thanks in advance

@Minege
Long time no see, how's life? I tried compiling the C part of the lib on a raspberry pi 4 (edit: using the update branch), and it seems to still crash at the same point:

Random.c: In function ‘GetRTSC’:
Random.c:141:2: error: impossible constraint in ‘asm’
  asm ("RDTSC" : "=A" (result));
  ^~~
make: *** [Makefile:32: Random.o] Error 1

I did not try on a RPi3 but I could if it's needed.

[ymaktepi]

Should be fixed in #15