| // Copyright (C) 2017-2018 Baidu, Inc. All Rights Reserved. |
| // |
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| |
| use sgx_types::*; |
| |
| /// |
| /// The rsgx_cpuid function performs the equivalent of a cpuid() function call or |
| /// intrinisic which executes the CPUID instruction to query the host processor for |
| /// the information about supported features. |
| /// |
| /// **Note** |
| /// |
| /// This function performs an OCALL to execute the CPUID instruction. |
| /// |
| /// # Description |
| /// |
| /// This function provides the equivalent of the cpuid() function or intrinsic. The |
| /// function executes the CPUID instruction for the given leaf (input). The CPUID |
| /// instruction provides processor feature and type information that is returned in |
| /// cpuinfo, an array of 4 integers to specify the values of EAX, EBX, ECX and EDX |
| /// registers. rsgx_cpuid performs an OCALL by invoking oc_cpuidex to get the |
| /// info from untrusted side because the CPUID instruction is an illegal instruction |
| /// in the enclave domain. |
| /// |
| /// **Note** |
| /// |
| /// As the CPUID instruction is executed by an OCALL, the results should not |
| /// be trusted. Code should verify the results and perform a threat evaluation |
| /// to determine the impact on trusted code if the results were |
| /// spoofed. |
| /// |
| /// The implementation of this function performs an OCALL and therefore, |
| /// this function will not have the same serializing or fencing behavior of |
| /// executing a CPUID instruction in an untrusted domain code flow. |
| /// |
| /// # Parameters |
| /// |
| /// **leaf** |
| /// |
| /// The leaf specified for retrieved CPU info. |
| /// |
| /// # Requirements |
| /// |
| /// Library: libsgx_tstdc.a |
| /// |
| /// # Return value |
| /// |
| /// The information returned in an array of four integers. |
| /// |
| /// # Errors |
| /// |
| /// **SGX_ERROR_INVALID_PARAMETER** |
| /// |
| /// Indicates the parameter is invalid. |
| /// |
| pub fn rsgx_cpuid(leaf: i32) -> SgxResult<sgx_cpuinfo_t> { |
| |
| let cpuinfo = [0_i32; 4]; |
| let ret = unsafe { sgx_cpuid(cpuinfo, leaf) }; |
| match ret { |
| sgx_status_t::SGX_SUCCESS => Ok(cpuinfo), |
| _ => Err(ret), |
| } |
| } |
| |
| /// |
| /// The rsgx_cpuidex function performs the equivalent of a cpuid_ex() function call or |
| /// intrinisic which executes the CPUID instruction to query the host processor for |
| /// the information about supported features. |
| /// |
| /// **Note** |
| /// |
| /// This function performs an OCALL to execute the CPUID instruction. |
| /// |
| /// # Description |
| /// |
| /// This function provides the equivalent of the cpuid_ex() function or intrinsic. The |
| /// function executes the CPUID instruction for the given leaf (input). The CPUID |
| /// instruction provides processor feature and type information that is returned in |
| /// cpuinfo, an array of 4 integers to specify the values of EAX, EBX, ECX and EDX |
| /// registers. rsgx_cpuidex performs an OCALL by invoking oc_cpuidex to get the |
| /// info from untrusted side because the CPUID instruction is an illegal instruction |
| /// in the enclave domain. |
| /// |
| /// **Note** |
| /// |
| /// As the CPUID instruction is executed by an OCALL, the results should not |
| /// be trusted. Code should verify the results and perform a threat evaluation |
| /// to determine the impact on trusted code if the results were |
| /// spoofed. |
| /// |
| /// The implementation of this function performs an OCALL and therefore, |
| /// this function will not have the same serializing or fencing behavior of |
| /// executing a CPUID instruction in an untrusted domain code flow. |
| /// |
| /// # Parameters |
| /// |
| /// **leaf** |
| /// |
| /// The leaf specified for retrieved CPU info. |
| /// |
| /// **subleaf** |
| /// |
| /// The sub-leaf specified for retrieved CPU info. |
| /// |
| /// # Requirements |
| /// |
| /// Library: libsgx_tstdc.a |
| /// |
| /// # Return value |
| /// |
| /// The information returned in an array of four integers. |
| /// |
| /// # Errors |
| /// |
| /// **SGX_ERROR_INVALID_PARAMETER** |
| /// |
| /// Indicates the parameter is invalid. |
| /// |
| pub fn rsgx_cpuidex(leaf: i32, subleaf: i32) -> SgxResult<sgx_cpuinfo_t> { |
| |
| let cpuinfo = [0_i32; 4]; |
| let ret = unsafe { sgx_cpuidex(cpuinfo, leaf, subleaf) }; |
| match ret { |
| sgx_status_t::SGX_SUCCESS => Ok(cpuinfo), |
| _ => Err(ret), |
| } |
| } |