Comments (1)
Some notes for future reference:
The driver /dev/sgx-step
currently only relies on the /dev/isgx
legacy driver in the following ways:
- discover enclave base address by retrieving the
sgx_encl
object from thevma->vm_private_data
field -- while this appears to still be the same in the upstream/dev/sgx_enclave
driver, we can probably do this cleaner from user space by simply querying the base address of the shared library enclave ELF file(?) - support EDBGRD/WR by calling
vma->vm_ops->access
-- while we can always call the ENCLS leaves ourselves, doing it via the vma operations fields may still be preferable to not have to worry about page faults etc; the upstream driver's sgx_vma_access appears to do this the same way, so this "should" work out of the box hopefully w the new driver as well
edit for future reference: both requirements can probably be fulfilled without relying on driver specifics using standard Linux interfaces under /proc/self/maps
and /proc/self/mem
from sgx-step.
Related Issues (20)
- Hyperlink of the approach to bypass devmem_is_allowed checks is unavailable HOT 3
- ./app: undefined symbol: sgx_get_aep HOT 8
- undefined symbol : sgx_get_aep HOT 10
- kernel panics when single-stepping [SOLVED: KPTI #PF for kernel IRQ] HOT 12
- error when running bench: [file.c] assertion '(f = fopen(path, "w"))' failed: No such file or directory HOT 6
- Work-in-progress Gramine port HOT 17
- Could add some explanation for each test application under app/ to README? HOT 1
- /dev/sgx-step would be uninstalled after os reboot HOT 2
- foreshadow/lvi building error , memcmp running error HOT 2
- os would always hang after running cpl/idt/memcmp HOT 8
- Refactor: page-fault abstraction in libsgxstep HOT 2
- Could sgx-step support SGX in-kernel/dcap driver? HOT 2
- victim.base && "no enclave found in /proc/self/maps HOT 4
- Support multithreaded enclaves
- ./install_SGX_SDK.sh can't find python2 HOT 3
- Trying to run app/memcmp but gives assertion error HOT 5
- Questions regarding the use of unmap_alias and sim_reload HOT 3
- Questions regarding fs_reload_threshold in foreshadow HOT 1
- Refactor build system
- More questions regarding unmap_alias() and leaking data HOT 1
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from sgx-step.