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| author |  Gerd Zellweger <gzellweger@vmware.com>
| 2020-04-03 18:32:09 -0700 |
|---|---|---|
| committer |  Gerd Zellweger <mail@gerdzellweger.com>
| 2020-04-03 18:33:41 -0700 |
| commit | 1a34443a5691625f0b6d033b17cb4fc467495b06 (patch) | |
| tree | 3be08c471d60c4aacb4d48b7b93404414e237331 | |
| parent | 69647f0c20bab4f240682c2f0b07624ec5c78d2f (diff) | |
| download | rust-x86-1a34443a5691625f0b6d033b17cb4fc467495b06.tar.gz rust-x86-1a34443a5691625f0b6d033b17cb4fc467495b06.tar.zst rust-x86-1a34443a5691625f0b6d033b17cb4fc467495b06.zip | |
Shortcuts to load gs/fs contents.
| -rw-r--r-- | src/bits64/segmentation.rs | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/bits64/segmentation.rs b/src/bits64/segmentation.rs index 6d58a80..cf6ccbd 100644 --- a/src/bits64/segmentation.rs +++ b/src/bits64/segmentation.rs @@ -176,6 +176,20 @@ pub unsafe fn rdfsbase() -> u64 { fs_base } +/// "Dereferences" the fs register at offset 0. +pub unsafe fn fs_deref() -> u64 { + let fs: u64; + asm!("movq %fs:0x0, $0" : "=r" (fs) ); + fs +} + +/// "Dereferences" the gs register at offset 0. +pub unsafe fn gs_deref() -> u64 { + let gs: u64; + asm!("movq %gs:0x0, $0" : "=r" (gs) ); + gs +} + /// Swap the GS register. /// /// Exchanges the current GS base register value with the value contained |