… occurs when in/out instructions are executed.

This fixes issue gramineproject#1191. This fixes the bug where in/out instructions are incorrectly generating SIGSEGV instead of SIGILL. To test this run cd libos/test/fs/ && gramine-test --sgx pytest  -v -k test_211_copy_lscpu_test

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

…PF that occurs when in/out instructions are executed.

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

…PF that occurs when in/out instructions are executed.

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

…PF that occurs when in/out instructions are executed.

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

…PF that occurs when in/out instructions are executed.

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

Executing I/O instructions (e.g., in/out) inside an SGX enclave generates
a #UD fault. Gramine's PAL tries to handle this exception and propogates
it to LibOS/app as a SIGILL signal.

However, I/O instructions result in a #GP fault (which raises a SIGSEGV
signal) if I/O is not permitted. Let Gramine emulate these instructions as
if they end up in SIGSEGV. This helps some apps, e.g. `lscpu`.

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

Signed-off-by: Nirjhar Roy <nirjhar.roy@fortanix.com>

Signed-off-by: Dmitrii Kuvaiskii <dmitrii.kuvaiskii@intel.com>