wireguard-openbsd/gnu/llvm, branch jd/simplify-queueingWireGuard implementation for the OpenBSD kernelhttps://git.zx2c4.com/wireguard-openbsd/atom/gnu/llvm?h=jd%2Fsimplify-queueing2020-06-04T22:33:17ZSet max atomic size for PowerPC.2020-06-04T22:33:17Zgkoehlergkoehler@openbsd.org2020-06-04T22:33:17Zurn:sha1:21ddc59af3b7bf4d9a666653828d7e9ee41cba12
32-bit PowerPC doesn't have instructions for lock-free atomic ops on
8-byte values, and needs libcalls like __atomic_fetch_add_8(). In
code like "_Atomic long long a; a++;", clang doesn't emit a libcall.
This was causing linker errors on symbols like __sync_fetch_and_add_8.
Now that LLVM knows the max atomic size, its AtomicExpandPass changes
these 8-byte ops into libcalls.
ok mortimer@
Switch Powerpc64 Big Endian to ELFv2 on OpenBSD, as least for now.2020-05-30T19:27:11Zdrahndrahn@openbsd.org2020-05-30T19:27:11Zurn:sha1:98c52506dedbd7b4b3f76d15c419a7ea974c7fb5
This should simplify bringup and make it easier to support Big Endian
and Little Endian with the same code.
May be reconsidered if it causes too many problems with Ports.
ok kettenis@
Powerpc64 should use same _mcount profiling as powerpc 32bit.2020-05-30T19:23:16Zdrahndrahn@openbsd.org2020-05-30T19:23:16Zurn:sha1:949932c898dbe0db8f3e57846975f25e49567f99
ok kettenis@
PowerPC: optimize away the frame pointer.2020-05-25T21:36:31Zgkoehlergkoehler@openbsd.org2020-05-25T21:36:31Zurn:sha1:fc80bb454272d95873f0fcb9cae4ef92ee9133f4
clang defaulted to -fomit-frame-pointer when optimizing PowerPC code
for Linux and NetBSD. Now do it for all systems, including OpenBSD.
This affects both 32-bit and powerpc64 code.
ok kettenis@
Use a distinct trap code with retguard on mips64.2020-05-23T07:18:50Zvisavisa@openbsd.org2020-05-23T07:18:50Zurn:sha1:59447aca8d09daa7e01d4745dffe3b139396b8c7
This lets the kernel detect retguard traps and send SIGABRT instead
of SIGEMT.
SIGEMT does not indicate correctly the nature of the error (stack
overflow, violation of control flow). It can confuse the user to restart
the program without further investigation.
Prompted by and OK deraadt@
OK mortimer@
Make sure that we add our OpenBSD specific defines on PowerPC64 targets.2020-05-20T07:07:44Zpatrickpatrick@openbsd.org2020-05-20T07:07:44Zurn:sha1:5a51f1c14b8d8ec321a16e1d85f6bed3b9492fa4
Prompted and tested by drahn@
ok deraadt@ drahn@ kettenis@ visa@
Don't make an illegal adde. Avoids fatal error on PowerPC.2020-05-02T05:34:08Zgkoehlergkoehler@openbsd.org2020-05-02T05:34:08Zurn:sha1:ffca677e9e7ca9efd316fa2f2b6572b193c50cf8
When the DAG truncates an ISD::ADDE node, DAGCombiner may optimize it
by making an adde with smaller operands. PowerPC has i1 registers,
and may truncate an i32 adde to i1, but an i1 adde is not legal for
PowerPC, and the legalize-ops phase can't fix it. This was causing
"fatal error: error in backend: Cannot select..."
cwen@ reported the error
ok mortimer@ kettenis@ deraadt@
Make sure that we really don't emut quad-precision unless the2020-04-09T17:08:56Zketteniskettenis@openbsd.org2020-04-09T17:08:56Zurn:sha1:00f51392e3b69b727541e329a65fd30b7f432c5e
"hard-quad-float" feature is available. Add missing replacement
instruction patterns that are needed to emit alternative code for
conditional moves of quad-precision floats.
ok mortimer@
Define the appropriate __GCC_HAVE_SYNC_COMPARE_AND_SWAP_* symbols like all2020-04-05T13:55:53Zketteniskettenis@openbsd.org2020-04-05T13:55:53Zurn:sha1:f7d9bb6830ad75deb53c1fcb554dc6445b20a279
other clang platforms do.
ok jca@
Fix "small pic" secure plt support.2020-04-04T09:54:04Zketteniskettenis@openbsd.org2020-04-04T09:54:04Zurn:sha1:3159fc8f233e5ccb749cd05b58cf5b93b8f45263
ok mortimer@