sgx_ustdc/backtrace.c

// Copyright (C) 2017-2018 Baidu, Inc. 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 Baidu, Inc., 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,
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#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>

int u_backtrace_open_ocall(int * error, const char * pathname, int flags)
{
    int ret = open(pathname, flags);
    if (error) {
        *error = ret == -1 ? errno : 0;
    }
    return ret;
}

int u_backtrace_close_ocall(int * error, int fd)
{
    int ret = close(fd);
    if (error) {
        *error = ret == -1 ? errno : 0;
    }
    return ret;
}

int u_backtrace_fcntl_ocall(int * error, int fd, int cmd, int arg)
{
    int ret = fcntl(fd, cmd, arg);
    if (error) {
        *error = ret == -1 ? errno : 0;
    }
    return ret;
}

void * u_backtrace_mmap_ocall(int * error, void * start, size_t length, int prot, int flags, int fd, off_t offset)
{
    void * ret = mmap(start, length, prot, flags, fd, offset);
    if (error) {
        *error = ret == MAP_FAILED ? errno : 0;
    }
    return ret;
}

int u_backtrace_munmap_ocall(int * error, void * start, size_t length)
{
    int ret = munmap(start, length);
    if (error) {
        *error = ret == -1 ? errno : 0;
    }
    return ret;
}