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15 Commits

Author SHA1 Message Date
Ahmed Bougacha 68854f4e57 [IR] Define ptrauth intrinsics. 
This defines the new `@llvm.ptrauth.` pointer authentication intrinsics:
sign, auth, strip, blend, and sign_generic, documented in PointerAuth.md.

Pointer Authentication is a mechanism by which certain pointers are
signed.  When a pointer gets signed, a cryptographic hash of its value
and other values (pepper and salt) is stored in unused bits of that
pointer.

Before the pointer is used, it needs to be authenticated, i.e., have its
signature checked.  This prevents pointer values of unknown origin from
being used to replace the signed pointer value.

sign and auth provide the core operations.  strip removes the ptrauth
bits from a signed pointer without checking them.  sign_generic allows
signing non-pointer values.  Finally, blend combines salt values
("discriminators") to derive more targeted and less reusable ones.

In later patches, we implement primary backend support for these
intrinsics using the AArch64 PAuth feature, and build on that to
implement the arm64e Darwin ABI and ELF PAuth ABI Extension in clang.

For more details, see the docs page, as well as our llvm-dev RFC:
  http://lists.llvm.org/pipermail/llvm-dev/2019-October/136091.html
or our 2019 Developers' Meeting talk.

Differential Revision: https://reviews.llvm.org/D90868
 2021-11-14 07:59:00 -08:00
Lang Hames ab4648504b [docs][JITLink] Add a JITLink design and API document. 2021-02-24 21:04:35 +11:00
JF Bastien 7bf73bcf6d [docs] LLVM Security Group and Process 
Summary:
See the corresponding RFC on llvm-dev for a discussion of this proposal.
  http://lists.llvm.org/pipermail/llvm-dev/2019-November/136839.html

Subscribers: jkorous, dexonsmith, arphaman, ributzka, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70326
 2020-07-10 15:24:02 -07:00
Sylvestre Ledru 72fd1033ea Doc: Links should use https 2020-03-22 22:49:33 +01:00
Pablo Barrio e440e0a715 Fix MemTagSanitizer docs to point at Armv8.5-A MTE 
The Memory Tagging Extension was introduced in Armv8.5-A.
 2020-03-05 17:23:58 +00:00
Evgenii Stepanov 27c9abae65 Add MemTagSanitizer documentation. 
Summary: A lot of this is work in progress...

Reviewers: kcc, pcc

Subscribers: cryptoad, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69289
 2019-11-01 10:46:04 -07:00
Daniel Sanders feab0334f5 [globalisel] Restructure the GlobalISel documentation 
There's a couple minor deletions amongst this but 99% of it is just moving
the documentation around to prepare the way for more meaningful changes.
 2019-10-25 15:51:09 -07:00
DeForest Richards 22373c595e [Docs] Moves Control Flow Document to User Guides 
Moves Control Flow document from Reference docs page to User guides page.

llvm-svn: 374733
 2019-10-13 20:05:22 +00:00
DeForest Richards edbb895b18 [Docs] Adds section for Additional Topics on Reference page 
Adds a new section for Additional Topics on the Reference documentation page. Also moves Support Library topic to User Guides page.

llvm-svn: 374230
 2019-10-09 21:09:09 +00:00
DeForest Richards 02d264a547 [Docs] Adds Documentation links to sidebar 
Adds links to Getting Started/Tutorials, User Guides, and Reference documentation pages to sidebar. Also adds a new section for LLVM IR on the Reference documentation page.

llvm-svn: 374214
 2019-10-09 20:26:13 +00:00
DeForest Richards 38d16c15b7 [Docs] Removes Subsystem Documentation page 
Removes Subsystem Documentation page. Also moves existing topics on Subsystem Documentation page to User Guides and Reference pages.

llvm-svn: 373872
 2019-10-06 22:49:22 +00:00
DeForest Richards de0e3aac2a [Docs] Removes Programming Documentation page 
Removes Programming Documentation page. Also moves existing topics on Programming Documentation page to User Guides and Reference pages. 

llvm-svn: 373856
 2019-10-06 16:10:11 +00:00
DeForest Richards 6d19651410 [Docs] Adds new Getting Started/Tutorials page 
Adds a new page for Getting Started/Tutorials topics. Also updates existing topic categories on the User Guides and Reference pages.

llvm-svn: 373854
 2019-10-06 15:36:37 +00:00
DeForest Richards eb78dea4cc [Docs] Moves article links to new pages 
Moves existing article links on the Programming, Subsystem, and Reference documentation pages to new locations. Also moves Github Repository and Publications links to the sidebar.

llvm-svn: 373169
 2019-09-29 15:31:52 +00:00
DeForest Richards ccf6030f7a [Docs] Moves Reference docs to new page 
Moves Reference docs to new page. Also adds a table of contents to Getting Involved page.

llvm-svn: 372796
 2019-09-25 00:49:02 +00:00