wireguard-openbsd/lib/libc/arch, branch master WireGuard implementation for the OpenBSD kernel https://git.zx2c4.com/wireguard-openbsd/atom/lib/libc/arch?h=master 2021-02-03T13:00:39Z Adding a hard-trap instruction after the __threxit syscall instruction 2021-02-03T13:00:39Z kurt kurt@openbsd.org 2021-02-03T13:00:39Z urn:sha1:05b039f4dc11d7662dcf95ccc48b62a2745a5111 broke pthreads on hppa. Reverting. Ok deraadt@ Geode CPU does not support SSE, so MXCSR does not exists there. As 2020-12-13T21:21:32Z bluhm bluhm@openbsd.org 2020-12-13T21:21:32Z urn:sha1:4856180f9a2b3d6bc7e69d3b31e067e957f4b8b5 our i386 compiler does not generate SSE instructions by default, it is not strictly necessary to save MXCSR content between setjmp(3) and longjmp(3). We do not want to end supporting such old processors now. Remove the stmxcsr and ldmxcsr instructions from libc. reported by Johan Huldtgren; OK jsg@ kettenis@ On i386 setjmp(3) should store the FPU state and longjmp(3) restore 2020-12-06T18:13:15Z bluhm bluhm@openbsd.org 2020-12-06T18:13:15Z urn:sha1:6559b00c5fb7177ff349319a849dc43f01440ccd it. There is enough space in jmp_buf to save MXCSR and CW register. Idea taken from amd64. This fixes regress/lib/libc/setjmp-fpu . OK kettenis@ Introduce constants to access the setjmp(3) jmp_buf fields from 2020-12-06T15:31:30Z bluhm bluhm@openbsd.org 2020-12-06T15:31:30Z urn:sha1:3a26117014390486743ddc86d9fd1b9bca79fbd6 i386 libc. The assembler code is more readable than with magic numbers. This brings i386 in line with amd64. No change in object file. OK kettenis@ Add retguard to macppc kernel locore.S, ofwreal.S, setjmp.S 2020-11-28T19:49:30Z gkoehler gkoehler@openbsd.org 2020-11-28T19:49:30Z urn:sha1:15572fcf8c6bfa0588565cd23f393a5a1499ea57 This changes RETGUARD_SETUP(ffs) to RETGUARD_SETUP(ffs, %r11, %r12) and RETGUARD_CHECK(ffs) to RETGUARD_CHECK(ffs, %r11, %r12) to show that r11 and r12 are in use between setup and check, and to pick registers other than r11 and r12 in some kernel functions. ok mortimer@ deraadt@ Actually m88k assembler can not handle 'nop' mnemonic, use a macro instead. 2020-11-07T02:52:08Z aoyama aoyama@openbsd.org 2020-11-07T02:52:08Z urn:sha1:ea0d283d96f7da374e9a3a920be989de8054b655 ok deraadt@ Retguard asm macros for powerpc libc, ld.so 2020-10-26T22:07:05Z gkoehler gkoehler@openbsd.org 2020-10-26T22:07:05Z urn:sha1:d2c5a4743fb945f45b034a3a830a96f7e1bc695d Add retguard to some, but not all, asm functions in libc. Edit SYS.h in libc to remove the PREFIX macros and add SYSENTRY (more like aarch64 and powerpc64), so we can insert RETGUARD_SETUP after SYSENTRY. Some .S files in this commit don't get retguard, but do stop using the old prefix macros. Tested by deraadt@, who put this diff in a macppc snap. Save and restore the MXCSR register and the FPU control word such that 2020-10-21T17:22:59Z kettenis kettenis@openbsd.org 2020-10-21T17:22:59Z urn:sha1:e48de7d1d806622671b6228964df45ff72f58824 floating-point control modes are properly restored by longjmp(3). ok guenther@ Use a trap instruction that unconditionally terminates the process. 2020-10-20T15:26:59Z visa visa@openbsd.org 2020-10-20T15:26:59Z urn:sha1:80466dde51009dbd49580caccfb3a8784eaac483 OK deraadt@ Retguard sigsetjmp on powerpc64. 2020-10-19T23:24:17Z mortimer mortimer@openbsd.org 2020-10-19T23:24:17Z urn:sha1:911403b16a487d378fc1cc17d73d345a2636c46b ok deraadt@