Tutorial Hello, world! QEMU [runtime] page fault

[Nigel Cole]

Hello!

I have QEMU running and pass the tests using "make run-tests", it also works running ./tests.ke in QEMU. When running "./hello/hello.ke" i get:

# ./hello/hello.ke

Verifying archive integrity... All good.

Uncompressing Keystone Enclave Package

[runtime] page fault at 0x2ada6 on 0x0 (scause: 0xd)

I used ./fast-setup.sh, complied everything in a created build directory and ran the tests which works. The page fault is consistent.

Followed all steps in http://docs.keystone-enclave.org/en/dev/Getting-Started/Tutorials/Build-Enclave-App-Hello-World.html. Copied to overlay root and ran "make image" which seems to work since QEMU has the root files when i run the QEMU script. Using dev branch.

[Dayeol Lee]

Could you blow up the entire <build dir>/examples directory and try again?

I've also encountered this issue before when I switched the branch from master to dev.

I think it's due to the old runtime version.

If it still doesn't work please let me know :D

Thanks,

Dayeol

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[Nigel Cole]

Hi!

I deleted the whole <build dir>/examples directory. Ran "make hello-package" in <build dir>, then "cp examples/hello/hello.ke ./overlay/root" and "make image" before running the qemu script. This doesn't work unfortunately :/

I am able to run ./tests.ke and ./hello-native.ke but ./hello.ke does not work. I also tried reinstalling everything but that didn't help. 

I am new to Keystone and was also wondering if "make image" should always included old files, even if I remove them from the overlay/root directory. But this probably is something I should check buildroot for.

Thanks in advance! :D

[Ryan Luna]

Hi,

I have this same issue. I have tried the suggested fix but did not work.

[Dayeol Lee]

Hi,

I was able to reproduce the issue.

I think this is a new issue after our toolchain bump.

I have created an issue https://github.com/keystone-enclave/keystone/issues/229

Please keep an eye on it!

Thanks,

Dayeol

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[Ryan Luna]

Awesome! Will do.

Thank you Dayeol.

[Nigel Cole]

Thank you Dayeol! :)

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[肆月]

Hello!

I encountered this issue using the master branch, too. So if it's the problem about the new libc, how can I make the example hello work?

Thanks in advance!

[Dayeol Lee]

glibc is currently broken in v1.0.0.

Please manually compile the enclave app (in this case hello) with musl and run the enclave manaully.

the prebuilt musl toolchain is in https://keystone-enclave.eecs.berkeley.edu/files/riscv-musl-toolchain-lp64d-rv64gc-2021.04.xenial.7z

Thanks,

Dayeol

[Li]

Hi all,

I used the prebuilt musl toolchain, and I changed the gnu to musl here:

https://github.com/keystone-enclave/keystone-sdk/blob/master/macros.cmake#L10

After that I built the hello world, however when I try to run the enclave, it cannot find ./hello-runner. Has anyone else gotten this problem when compiling the hello app with Musl?

# insmod keystone-driver.ko
[   11.102290] keystone_driver: loading out-of-tree module taints kernel.
[   11.117492] keystone_enclave: keystone enclave v1.0.0
# ./musl/hello.ke

Verifying archive integrity... All good.
Uncompressing Keystone Enclave Package

./musl/hello.ke: line 514: ./hello-runner: No such file or directory
# ls musl/
CMakeFiles           eyrie-rt             hello.ke
Makefile             hello                pkg
cmake_install.cmake  hello-runner         runtime
# 

Thank you in advance