54 lines
1.8 KiB
Rust
54 lines
1.8 KiB
Rust
// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Do not remove inline: will result in relocation failure
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#[inline(always)]
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pub(crate) unsafe fn rel_ptr<T>(offset: u64) -> *const T {
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(image_base() + offset) as *const T
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}
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// Do not remove inline: will result in relocation failure
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#[inline(always)]
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pub(crate) unsafe fn rel_ptr_mut<T>(offset: u64) -> *mut T {
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(image_base() + offset) as *mut T
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}
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extern {
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static ENCLAVE_SIZE: usize;
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}
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// Do not remove inline: will result in relocation failure
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// For the same reason we use inline ASM here instead of an extern static to
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// locate the base
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#[inline(always)]
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fn image_base() -> u64 {
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let base;
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unsafe { asm!("lea IMAGE_BASE(%rip),$0":"=r"(base)) };
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base
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}
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/// Returns `true` if the specified memory range is in the enclave.
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#[unstable(feature = "sgx_platform", issue = "56975")]
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pub fn is_enclave_range(p: *const u8, len: usize) -> bool {
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let start=p as u64;
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let end=start + (len as u64);
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start >= image_base() &&
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end <= image_base() + (unsafe { ENCLAVE_SIZE } as u64) // unsafe ok: link-time constant
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}
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/// Returns `true` if the specified memory range is in userspace.
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#[unstable(feature = "sgx_platform", issue = "56975")]
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pub fn is_user_range(p: *const u8, len: usize) -> bool {
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let start=p as u64;
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let end=start + (len as u64);
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end <= image_base() ||
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start >= image_base() + (unsafe { ENCLAVE_SIZE } as u64) // unsafe ok: link-time constant
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}
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