Initial release of Intel SGX for Linux.

This release is used in conjunction with the linux-sgx-driver Intial release:
https://github.com/01org/linux-sgx-driver
commit-id: 0e865ce5e6b297a787bcdc12d98bada8174be6d7

Intel-id: 33399

Signed-off-by: Angie Chinchilla <angie.v.chinchilla@intel.com>

sdk/simulation/uinst/enclave_mngr.cpp

@@ -0,0 +1,253 @@
+/*
+ * Copyright (C) 2011-2016 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <string.h>
+
+#include "se_memory.h"
+#include "se_memcpy.h"
+#include "util.h"
+#include "enclave_mngr.h"
+#include "se_atomic.h"
+
+
+static uint32_t atomic_inc32(uint32_t volatile *val)
+{
+    return se_atomic_inc(val);
+}
+
+uint32_t CEnclaveSim::m_counter = 1;
+
+sgx_enclave_id_t CEnclaveSim::gen_enclave_id(void)
+{
+    //getpid() is to simulate fork() scenario, refer to do_ecall in sig_handler.cpp
+    sgx_enclave_id_t id = ((uint64_t)getpid() << 32) | atomic_inc32(&m_counter);
+    return id;
+}
+
+CEnclaveSim::CEnclaveSim(const secs_t* secs)
+{
+    m_cpages = static_cast<size_t>(secs->size >> SE_PAGE_SHIFT);
+    m_flags = new si_flags_t[m_cpages];
+
+    // pages flags are initialized to -1
+    memset(m_flags, 0xff,  m_cpages * sizeof(si_flags_t));
+
+    memcpy_s(&m_secs, sizeof(m_secs), secs, sizeof(*secs));
+
+    m_enclave_id = gen_enclave_id();
+}
+
+CEnclaveSim::~CEnclaveSim()
+{
+    delete[] m_flags;
+    se_virtual_free(m_secs.base, (size_t)m_secs.size, MEM_RELEASE);
+}
+
+sgx_enclave_id_t CEnclaveSim::get_enclave_id() const
+{
+    return m_enclave_id;
+}
+
+secs_t* CEnclaveSim::get_secs()
+{
+    return &m_secs;
+}
+
+size_t CEnclaveSim::get_pg_idx(const void* pgaddr) const
+{
+    return PTR_DIFF(pgaddr, m_secs.base) >> SE_PAGE_SHIFT;
+}
+
+
+bool CEnclaveSim::validate_pg_and_flags(const void* addr, si_flags_t flags)
+{
+    // Must be page aligned
+    if (!IS_PAGE_ALIGNED(addr))
+        return false;
+
+    size_t page_idx = get_pg_idx(addr);
+    // Must be within enclave address space
+
+    if (page_idx >= m_cpages)
+        return false;
+
+    // Requested flags should only set those visible by instuctions
+    if ((flags & (~SI_FLAGS_EXTERNAL)))
+        return false;
+
+    return true;
+}
+
+
+bool CEnclaveSim::add_page(const void* addr, si_flags_t flags)
+{
+    if (!validate_pg_and_flags(addr, flags))
+        return false;
+
+    // We only deal with these flags
+    flags &= static_cast<si_flags_t>(SI_FLAGS_EXTERNAL);
+
+    // Must not have been added yet
+    size_t page_idx = get_pg_idx(addr);
+
+    if (m_flags[page_idx] != (si_flags_t)-1)
+        return false;
+
+    m_flags[page_idx] = flags;
+
+    return true;
+}
+
+bool CEnclaveSim::remove_page(const void* epc_lin_addr)
+{
+    size_t page_idx = get_pg_idx(epc_lin_addr);
+
+    if (m_flags[page_idx] != (si_flags_t)-1) {
+        m_flags[page_idx] = (si_flags_t)-1;
+        return true;
+    }
+
+    return false;
+}
+bool CEnclaveSim::is_tcs_page(const void* addr) const
+{
+    // Must be page aligned
+    if (!IS_PAGE_ALIGNED(addr))
+        return false;
+
+    size_t page_idx = get_pg_idx(addr);
+
+    // Must be within enclave address space
+    if (page_idx >= m_cpages)
+        return false;
+
+    return (m_flags[page_idx] & SI_FLAG_PT_MASK) == SI_FLAG_TCS;
+}
+
+
+//////////////////////////////////////////////////////////////////////
+CEnclaveMngr::CEnclaveMngr()
+{
+    se_mutex_init(&m_list_lock);
+}
+
+CEnclaveMngr::~CEnclaveMngr()
+{
+    se_mutex_destroy(&m_list_lock);
+
+    std::list<CEnclaveSim*>::iterator it = m_enclave_list.begin();
+    for (; it != m_enclave_list.end(); ++it)
+    {
+        delete (*it);
+    }
+}
+
+// Note: this singleton implemenation is not multi-threading safe.
+CEnclaveMngr* CEnclaveMngr::get_instance()
+{
+    static CEnclaveMngr mngr;
+    return &mngr;
+}
+
+// Use constructor attribute to make sure that the later calling of 
+// CEnclaveMngr::get_instance() is MT-safe.
+__attribute__ ((__constructor__)) static void build_mngr_instance()
+{
+    CEnclaveMngr::get_instance();
+}
+
+void CEnclaveMngr::add(CEnclaveSim* ce)
+{
+    if (ce != NULL)
+    {
+        se_mutex_lock(&m_list_lock);
+        m_enclave_list.push_back(ce);
+        se_mutex_unlock(&m_list_lock);
+    }
+}
+
+void CEnclaveMngr::remove(CEnclaveSim* ce)
+{
+    if (ce != NULL)
+    {
+        se_mutex_lock(&m_list_lock);
+        m_enclave_list.remove(ce);
+        se_mutex_unlock(&m_list_lock);
+    }
+}
+
+CEnclaveSim* CEnclaveMngr::get_enclave(const sgx_enclave_id_t id)
+{
+    CEnclaveSim* ce = NULL;
+
+    se_mutex_lock(&m_list_lock);
+
+    std::list<CEnclaveSim*>::iterator it = m_enclave_list.begin();
+    for (; it != m_enclave_list.end(); ++it)
+    {
+        if ((*it)->get_enclave_id() == id)
+        {
+            ce = *it;
+            break;
+        }
+    }
+
+    se_mutex_unlock(&m_list_lock);
+    return ce;
+}
+
+CEnclaveSim* CEnclaveMngr::get_enclave(const void* base_addr)
+{
+    CEnclaveSim* ce = NULL;
+
+    se_mutex_lock(&m_list_lock);
+
+    std::list<CEnclaveSim*>::iterator it = m_enclave_list.begin();
+    for (; it != m_enclave_list.end(); ++it)
+    {
+        secs_t* secs = (*it)->get_secs();
+        if (base_addr >= secs->base &&
+            PTR_DIFF(base_addr, secs->base) < secs->size)
+        {
+            ce = *it;
+            break;
+        }
+    }
+
+    se_mutex_unlock(&m_list_lock);
+    return ce;
+}
+
+CEnclaveSim* CEnclaveMngr::get_enclave(const secs_t* secs)
+{
+    // The pEnclaveSECS field might not have been initialized yet.
+    return get_enclave(secs->base);
+}