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siqian__wei
Beginner
150 Views

using CMake to complie cause SGX_ERROR_UNEXPECTED ?

  Today i found a problem in my code. It return SGX_ERROR_UNEXPECTED when i call sgx_create_enclave in some situations. I think there are something wrong in my CMakeLists.txt( I use cmake to compile the untrusted part in my project), because code run correctly when i use the template Makefile in sdk example to compile. More detail blow:

  code available here (i have remove all unnecessary code):  https://github.com/chilogen/workspace/tree/master/error/SimpleEnclave

  code will run success in below situations:

      * compile with Makefile

      * compile with cmake and comment out app.cpp:20

  code will return error in below situation:

      * compile with cmake and do not comment out app.cpp:20

  So, what is wrong in my code (or CMakeLists.txt), how should i do?

  I will be so thankful if your get me some idea about it.

update : paste code here

app.cpp

 

#include "enclave_u.h"
#include <sgx_urts.h>
#include <sgx_uae_service.h>
#include <sgx_ukey_exchange.h>
#include <iostream>

using  namespace std;
class testClass {
public:
    sgx_launch_token_t _token = {0};
    sgx_enclave_id_t _eid;
    sgx_ra_context_t _ctx;
    void init_enclave();
    bool request(uint8_t *src, uint32_t srcLen, uint8_t *cmac);
    //will set _ctx here
    //void do_attestation();
}x;
bool testClass::request(uint8_t *src, uint32_t srcLen, uint8_t *cmac) {
    sgx_status_t retval,status;
    status = ecall_calcmac(_eid, &retval,&_ctx, SGX_RA_KEY_SK, src, srcLen, cmac);
    return true;
}
void testClass::init_enclave(){
    sgx_enclave_id_t global_eid;

    sgx_launch_token_t token={0};
    sgx_status_t ret;
    int updated=0;
    ret=sgx_create_enclave("enclave.signed.so",SGX_DEBUG_FLAG, \
                            &token,&updated,&global_eid,NULL);

    if(ret!=SGX_SUCCESS){
        std::cout<<"error init enclavedsfdsf\n";
        printf("%08x\n",ret);
        exit(1);
    }
}

int main(){
    x.init_enclave();
    return 0;
}

CMakeLists.txt (code return error code 0000001)

 

include_directories (/opt/intel/sgxsdk/include)

link_directories (/opt/intel/sgxsdk/lib64)

add_library (enclave_untrusted enclave_u.c)

add_executable (app app.cpp)

target_link_libraries (app enclave_untrusted sgx_ukey_exchange sgx_urts sgx_uae_service pthread)

 

compile.sh (or Makefile , program run correctly)

gcc -c -I /opt/intel/sgxsdk/include/ -o enclave_u.o enclave_u.c g++ -c app.cpp -o app.o -I /opt/intel/sgxsdk/include/ g++ -o app app.o enclave_u.o -L /opt/intel/sgxsdk/lib64 -lsgx_urts -lsgx_ukey_exchange -lsgx_uae_service -pthread

0 Kudos
2 Replies
siqian__wei
Beginner
150 Views

problem have been solved on stackoverflow by guillaume-racicot. Refer to https://stackoverflow.com/questions/54735200/using-cmake-to-complie-cause-sgx-error-unexpected

you_w_
New Contributor III
150 Views

Hi: 
The poroblem is that you didn't link the right sgx_utrs file.You can change your CmakeLists.txt as this. 
1 cmake_minimum_required(VERSION 2.8)
  2 SET(App_C_Flags "-m64 -fPIC -Wno-attributescmake")
  3 SET(App_Cpp_Flags "${App_C_Flags} -std=c++11")
  4 SET(CMAKE_CXX_FLAGS ${App_Cpp_Flags})
  5 SET(SGX_SDK /opt/intel/sgxsdk)
  6 SET(Urts_Library_Name sgx_urts)
  7 SET(Uservice_Library_Name sgx_uae_service)
  8 find_library(Urts sgx_urts "/lib64")
  9 SET(App_Link_Flags "-L/lib64 -l${Urts_Library_Name} -L${SGX_SDK}/lib64 -lpthread -l${Uservice_Library_Name}")
 10 SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${App_Link_Flags}")
 11 include_directories (/opt/intel/sgxsdk/include)
 12 LINK_DIRECTORIES("/lib64")
 13
 14 add_library (enclave_untrusted enclave_u.c)
 15
 16 add_executable (app app.cpp)
 17
 18 target_link_libraries (app enclave_untrusted ${Urts} sgx_ukey_exchange sgx_uae_service pthread)

 

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