WireGuard implementation for the OpenBSD kernel https://git.zx2c4.com/wireguard-openbsd/atom/gnu/usr.bin/binutils/include/opcode/mips.h?h=jd%2Fsimplify-queueing 2010-02-03T21:44:17Z 2010-02-03T21:44:17Z miod miod@openbsd.org 2010-02-03T21:44:17Z urn:sha1:e4ff4a19c44407f2c73360fa24737543bf26b849 is intended to be used when compiling kernel code which will run on a Loongson 2E or 2F processor, and inserts an explicit BTB clear operation before every jump through a register (jr or jalr instructions), unless that register is k0 or k1, or we are in .set noat. This is a reliable, although aggressive, workaround for the misbehaviour of the branch prediction engine of many Loongson 2F processors with regard to the Branch Translation Buffer, for which an official errata has yet to be published, and for which the Loongson suggested workaround apparently only works due to pipeline side effects, but requires all the executable kernel code to be located in CKSEG0/CKSEG1. These changes are inspired by a backport of the Loongson binutils 2.19 patch to binutils 2.18; the idea of doing an aggressive BTB clear is mine. This causes no functional change to code compiled without the -mfix-loongson2f-btb option. ``looks reasonable'' kettenis@ 2004-11-02T20:44:57Z miod miod@openbsd.org 2004-11-02T20:44:57Z urn:sha1:007c2a4539b8b8aaa95c5e73e77620090abe113b - extra $(SHELL) and sugar for make (so that files not mode +x still work) - safer temp file handling - our W^X binary layout changes in ld - OpenBSD policy for library file selection in ld - arm and m88k changes which were not merged in time for official 2.15 - bfd core file handling - a couple typos New for 2.15: - ld(1) and as(1) manpages now generated at build time - binutils/stabs.c reverted to use our in-tree libiberty for now - we still use our VIA C3 crypto code over stock binutils, as it recognizes more instructions - new emulations for OpenBSD on mips64 machines, to help OpenBSD/sgi - relaxed %f# handling in gas on OpenBSD/sparc64 (same as was in 2.14) Tested on all platforms by various people; special thanks to sturm@ and otto@. 2004-05-17T21:54:18Z drahn drahn@openbsd.org 2004-05-17T21:54:18Z urn:sha1:c074d1c999f3e07019cd5e9a2f190b057ef3b935 remove testsuites (not useable) remove mmalloc (not part of new binutils). 2002-05-13T17:07:28Z fgsch fgsch@openbsd.org 2002-05-13T17:07:28Z urn:sha1:b55d46928a2b71c17e5349c93fca2971ba1cafa1 2000-09-12T19:10:55Z espie espie@openbsd.org 2000-09-12T19:10:55Z urn:sha1:b305b0f1cb8417acb9d6ca66ca17b05cf1dc8fc9 1996-09-04T17:34:35Z niklas niklas@openbsd.org 1996-09-04T17:34:35Z urn:sha1:4361b62e1e00d0f5a67533135ab16f1f168005d6 1996-01-08T11:03:33Z niklas niklas@openbsd.org 1996-01-08T11:03:33Z urn:sha1:2159047f7a97bd07d66507696a8b038f6aef0509