wireguard-openbsd/gnu/llvm/lib/CodeGen/StackProtector.cpp, branch jd/histogramWireGuard implementation for the OpenBSD kernelhttps://git.zx2c4.com/wireguard-openbsd/atom/gnu/llvm/lib/CodeGen/StackProtector.cpp?h=jd%2Fhistogram2019-06-23T22:05:08ZMerge LLVM 8.0.0 release.2019-06-23T22:05:08Zpatrickpatrick@openbsd.org2019-06-23T22:05:08Zurn:sha1:f27a781c9811da94fe68b2cf34237c2a61b48c96
Prepared with help from jsg@ and mortimer@
Tested on amd64 by bcallah@, krw@, naddy@
Tested on arm64 by patrick@
Tested on macppc by kettenis@
Tested on octeon by visa@
Tested on sparc64 by claudio@
Merge LLVM 7.0.1 release.2019-01-27T16:55:35Zpatrickpatrick@openbsd.org2019-01-27T16:55:35Zurn:sha1:5072e66b18f5d3ac6abf1c18a092e85eab2d7568
With fixes from mortimer@ (thanks!)
Tested by many, especially naddy@ (thanks!)
Merge LLVM 6.0.0 release.2018-04-06T14:38:21Zpatrickpatrick@openbsd.org2018-04-06T14:38:21Zurn:sha1:2237ee5c623fa764b1a59671783d4b7a52dd741eMerge LLVM 5.0.0 release.2017-10-04T20:51:20Zpatrickpatrick@openbsd.org2017-10-04T20:51:20Zurn:sha1:e48371bb3a3f1b4e66fe2cf2ebc4ff8ab9856711Merge LLVM 4.0.0 rc12017-01-24T08:39:00Zpatrickpatrick@openbsd.org2017-01-24T08:39:00Zurn:sha1:78b306486612785150cf0fa168c56d015802182aMerge LLVM 3.9.12017-01-14T20:03:33Zpatrickpatrick@openbsd.org2017-01-14T20:03:33Zurn:sha1:dc7ed217e9eb98649b8c5ed4495b0a3dc1b7ff43Backport https://reviews.llvm.org/rL279449 from upstream2016-09-07T07:44:07Zstefanstefan@openbsd.org2016-09-07T07:44:07Zurn:sha1:66dbc610165a0fe483236799a0b755189d9920de
ok pascal@
Original commit message:
[SSP] Do not set __guard_local to hidden for OpenBSD SSP
guard_local is defined as long on OpenBSD. If the source file contains
a definition of guard_local, it mismatches with the int8 pointer type
used in LLVM. In that case, Module::getOrInsertGlobal() returns a
cast operation instead of a GlobalVariable. Trying to set the
visibility on the cast operation leads to random segfaults (seen when
compiling the OpenBSD kernel, which also runs with stack
protection).
In the kernel, the hidden attribute does not matter. For userspace code,
guard_local is defined as hidden in the startup code. If a program
re-defines guard_local, the definition from the startup code will
either win or the linker complains about multiple definitions
(depending on whether the re-defined __guard_local is placed in the
common segment or not).
It also matches what gcc on OpenBSD does.
Use the space freed up by sparc and zaurus to import LLVM.2016-09-03T22:46:54Zpascalpascal@openbsd.org2016-09-03T22:46:54Zurn:sha1:b5500b9ca0102f1ccaf32f0e77e96d0739aded9b
ok hackroom@