wireguard-openbsd/lib/csu/aarch64, branch masterWireGuard implementation for the OpenBSD kernelhttps://git.zx2c4.com/wireguard-openbsd/atom/lib/csu/aarch64?h=master2020-10-19T17:57:40Zreplace ad-hoc illegal instruction with the architecturally defined one2020-10-19T17:57:40Znaddynaddy@openbsd.org2020-10-19T17:57:40Zurn:sha1:5bbf88322ed6a7a68da69a643f5f3b793160f0cd
("permanently undefined")
ok deraadt@ kettenis@
crt0 MD _dl_exit() performs syscall to SYS_exit directly, but then2020-10-15T16:30:21Zderaadtderaadt@openbsd.org2020-10-15T16:30:21Zurn:sha1:2bc3a8c076b486ad5cb1adf52ac1373fba054b0a
some of these functions were returning. That makes the +1word address
a fairly strong and easily located gadget. Put a hard-trap
instruction after the syscall. This remains a gadget for 'terminal
system' calls (such as execve), but hey that's why we have pledge w/o
"exec" throughout the tree.
Quite surprisingly, hppa's delay-slot load of SYS_exit makes it the
safest of the bunch, not that this helps anyone.
ok kettenis
use symbolic SYS_exit instead of the value 12020-10-14T22:11:18Zderaadtderaadt@openbsd.org2020-10-14T22:11:18Zurn:sha1:9c558c1181d4532fa3a04595bff127adc23ef057
ok kettenis
Now that the kernel skips the two instructions immediately following2020-02-18T12:19:11Zketteniskettenis@openbsd.org2020-02-18T12:19:11Zurn:sha1:5ecc9681133f1894e81c385eddd09981f78f1193
a syscall, replace the double nop with a dsb nsh; isb; sequence which
stops the CPU from speculating any further. This fix was suggested
by Anthony Steinhauser.
ok deraadt@
Insert two nop instructions after each svc #0 instruction in userland.2020-01-26T02:19:43Zketteniskettenis@openbsd.org2020-01-26T02:19:43Zurn:sha1:0c401ffc2a2550c32105ce180746b0a95071123b
The will be replaced by a speculation barrier as soon as we teach the
kernel to skip over these two instructions when returning from a
system call.
ok patrick@, deraadt@
Fix address calculation for _DYNAMIC. We want to address of _DYNAMIC itself,2018-07-24T09:27:44Zketteniskettenis@openbsd.org2018-07-24T09:27:44Zurn:sha1:4e61412a9215922e6ef944624481c07968eba071
not the address of its GOT entry. The current code mixed the high bits of
the GOT entry address with the low bits of the true address. This only
worked by accident for small binaries where _DYNAMIC and its GOT entry
happen to reside on the same page.
ok guenther@, mortimer@
_dl_printf is no longer referenced by RELOC_{JMPREL,DYN,GOT}; delete the stub2017-08-11T20:13:30Zguentherguenther@openbsd.org2017-08-11T20:13:30Zurn:sha1:344baaa7369214af57d570c2005bb07927710f77
ok kettenis@
Our certbegin/certend is always PIC, so remove the non-PIC MD_SECT_CALL_FUNC()2017-02-26T22:26:42Zketteniskettenis@openbsd.org2017-02-26T22:26:42Zurn:sha1:920eed1a4a939da04e8d182d011fb3796a8790e6
implementations.
ok guenther@
Fix passing &_DYNAMIC to _dl_boot_bind; makes -static -pie work.2017-01-24T01:43:32Zketteniskettenis@openbsd.org2017-01-24T01:43:32Zurn:sha1:8a7435558acf8bc1d6f85f86c409ddd01e843c0cAdd support for AArch64.2017-01-11T13:59:02Zpatrickpatrick@openbsd.org2017-01-11T13:59:02Zurn:sha1:b2749fa90657b3dae4d137753a983e6522a895c7