sync with OpenBSD -current
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parent
086d8cf2c2
commit
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GPG key ID:
F42C07F07E2E35B7
87 changed files with 852 additions and 180 deletions
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@ -1,4 +1,4 @@
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/* $OpenBSD: DEFS.h,v 1.2 2023/12/10 16:45:50 deraadt Exp $ */
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/* $OpenBSD: DEFS.h,v 1.4 2023/12/11 22:24:15 kettenis Exp $ */
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/*
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* Copyright (c) 2015,2018,2021 Philip Guenther <guenther@openbsd.org>
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*
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@ -20,8 +20,10 @@
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/* ARM just had to be different... */
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#ifndef __arm__
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# define _FUNC_TYPE @function
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# define _PROGBITS @progbits
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#else
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# define _FUNC_TYPE #function
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# define _PROGBITS %progbits
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#endif
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/*
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@ -69,7 +71,8 @@
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#define _END(x) .size x, . - x
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#define PINSYSCALL(sysno, label) \
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.pushsection .openbsd.syscalls,"",@progbits; \
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.pushsection .openbsd.syscalls,"",_PROGBITS; \
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.p2align 2; \
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.long label; \
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.long sysno; \
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.popsection;
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@ -1,4 +1,4 @@
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/* $OpenBSD: SYS.h,v 1.17 2023/12/10 16:45:50 deraadt Exp $ */
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/* $OpenBSD: SYS.h,v 1.18 2023/12/11 22:24:15 kettenis Exp $ */
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/* $NetBSD: SYS.h,v 1.4 1996/10/17 03:03:53 cgd Exp $ */
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/*
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@ -58,6 +58,7 @@
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#define PINSYSCALL(sysno, label) \
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.pushsection .openbsd.syscalls,"",@progbits; \
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.p2align 2; \
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.long label; \
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.long sysno; \
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.popsection;
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@ -1,4 +1,4 @@
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/* $OpenBSD: SYS.h,v 1.24 2023/12/10 16:45:51 deraadt Exp $ */
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/* $OpenBSD: SYS.h,v 1.26 2023/12/11 22:24:15 kettenis Exp $ */
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/*
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* Copyright (c) 1998-2002 Michael Shalayeff
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@ -69,6 +69,7 @@
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#define PINSYSCALL(sysno, label) \
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.pushsection .openbsd.syscalls,"",@progbits !\
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.p2align 2 !\
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.long label !\
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.long sysno !\
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.popsection
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@ -120,8 +121,8 @@ SYSENTRY(x) !\
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stw rp, HPPA_FRAME_ERP(sr0,sp) !\
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ldil L%SYSCALLGATE, r1 !\
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97: ble 4(sr7, r1) !\
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PINSYSCALL(__CONCAT(SYS_,x), 97b) !\
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ldi __CONCAT(SYS_,x), t1 !\
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PINSYSCALL(__CONCAT(SYS_,y), 97b) !\
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ldi __CONCAT(SYS_,y), t1 !\
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ldw HPPA_FRAME_ERP(sr0,sp), rp !\
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bv r0(rp) !\
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nop !\
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@ -1,4 +1,4 @@
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/* $OpenBSD: DEFS.h,v 1.4 2023/12/10 16:45:51 deraadt Exp $ */
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/* $OpenBSD: DEFS.h,v 1.5 2023/12/11 22:24:15 kettenis Exp $ */
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/*
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* Copyright (c) 2017 Philip Guenther <guenther@openbsd.org>
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*
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@ -50,6 +50,7 @@
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#define PINSYSCALL(sysno, label) \
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.pushsection .openbsd.syscalls,"",@progbits; \
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.p2align 2; \
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.long label; \
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.long sysno; \
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.popsection;
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@ -1,4 +1,4 @@
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/* $OpenBSD: DEFS.h,v 1.4 2023/12/10 16:45:51 deraadt Exp $ */
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/* $OpenBSD: DEFS.h,v 1.5 2023/12/11 22:24:15 kettenis Exp $ */
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#include <machine/asm.h>
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@ -26,6 +26,7 @@
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#define PINSYSCALL(sysno, label) \
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.pushsection .openbsd.syscalls,"",@progbits; \
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.p2align 2; \
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.long label; \
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.long sysno; \
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.popsection;
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@ -29,7 +29,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $OpenBSD: SYS.h,v 1.13 2023/12/10 16:45:51 deraadt Exp $
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* $OpenBSD: SYS.h,v 1.14 2023/12/11 22:24:16 kettenis Exp $
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*/
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#include <sys/syscall.h>
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@ -127,6 +127,7 @@
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#define PINSYSCALL(sysno, label) \
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.pushsection .openbsd.syscalls,"",@progbits; \
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.p2align 2; \
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.long label; \
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.long sysno; \
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.popsection;
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@ -1,4 +1,4 @@
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/* $OpenBSD: DEFS.h,v 1.2 2023/12/10 16:45:52 deraadt Exp $ */
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/* $OpenBSD: DEFS.h,v 1.3 2023/12/11 22:24:16 kettenis Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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@ -70,6 +70,7 @@
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#define PINSYSCALL(sysno, label) \
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.pushsection .openbsd.syscalls,"",@progbits; \
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.p2align 2; \
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.long label; \
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.long sysno; \
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.popsection;
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@ -1,4 +1,4 @@
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/* $OpenBSD: DEFS.h,v 1.2 2023/12/10 16:45:52 deraadt Exp $ */
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/* $OpenBSD: DEFS.h,v 1.3 2023/12/11 22:24:16 kettenis Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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@ -60,6 +60,7 @@
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#define PINSYSCALL(sysno, label) \
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.pushsection .openbsd.syscalls,"",@progbits; \
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.p2align 2; \
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.long label; \
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.long sysno; \
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.popsection;
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@ -1,4 +1,4 @@
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/* $OpenBSD: SYS.h,v 1.14 2023/12/10 16:45:52 deraadt Exp $ */
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/* $OpenBSD: SYS.h,v 1.15 2023/12/11 22:24:16 kettenis Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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@ -87,6 +87,7 @@
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#define PINSYSCALL(sysno, label) \
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.pushsection .openbsd.syscalls,"",@progbits; \
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.p2align 2; \
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.long label; \
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.long sysno; \
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.popsection;
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@ -1,4 +1,4 @@
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# $OpenBSD: Makefile.inc,v 1.174 2023/08/20 15:17:53 visa Exp $
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# $OpenBSD: Makefile.inc,v 1.175 2023/12/11 00:34:24 deraadt Exp $
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# $NetBSD: Makefile.inc,v 1.35 1995/10/16 23:49:07 jtc Exp $
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# @(#)Makefile.inc 8.1 (Berkeley) 6/17/93
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@ -208,8 +208,8 @@ MAN+= __get_tcb.2 __thrsigdivert.2 __thrsleep.2 _exit.2 accept.2 \
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mimmutable.2 minherit.2 mkdir.2 mkfifo.2 mknod.2 mlock.2 \
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mlockall.2 mmap.2 mount.2 mprotect.2 mquery.2 msyscall.2 msgctl.2 \
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msgget.2 msgrcv.2 msgsnd.2 msync.2 munmap.2 nanosleep.2 \
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nfssvc.2 open.2 pathconf.2 pinsyscall.2 pipe.2 pledge.2 poll.2 \
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profil.2 ptrace.2 quotactl.2 read.2 readlink.2 reboot.2 recv.2 \
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nfssvc.2 open.2 pathconf.2 pinsyscall.2 pinsyscalls.2 pipe.2 pledge.2 \
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poll.2 profil.2 ptrace.2 quotactl.2 read.2 readlink.2 reboot.2 recv.2 \
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rename.2 revoke.2 rmdir.2 sched_yield.2 select.2 semctl.2 semget.2 \
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semop.2 send.2 setgroups.2 setpgid.2 setregid.2 \
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setresuid.2 setreuid.2 setsid.2 sendsyslog.2 setuid.2 shmat.2 \
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76
lib/libc/sys/pinsyscalls.2
Normal file
76
lib/libc/sys/pinsyscalls.2
Normal file
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@ -0,0 +1,76 @@
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.\" $OpenBSD: pinsyscalls.2,v 1.1 2023/12/11 00:34:24 deraadt Exp $
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.\"
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.\" Copyright (c) 2023 Theo de Raadt <deraadt@openbsd.org>
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.\"
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.\" Permission to use, copy, modify, and distribute this software for any
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.\" purpose with or without fee is hereby granted, provided that the above
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.\" copyright notice and this permission notice appear in all copies.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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.\"
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.Dd $Mdocdate: December 11 2023 $
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.Dt PINSYSCALLS 2
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.Os
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.Sh NAME
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.Nm pinsyscalls
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.Nd pin system call entry to precise locations in the address space
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.Sh SYNOPSIS
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.In sys/types.h
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.Ft int
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.Fn pinsyscalls "void *start" "size_t len" "uint *pintable" "size_t pintablesize"
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.Sh DESCRIPTION
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The
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.Fn pinsyscalls
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system call specifies the
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.Va start
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to
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.Va start + len
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range in the address space where the system call entry instructions are found,
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and furthermore provides a table of uint offsets from that
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.Va start
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(indexed by the system call number) to
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provide the precise location for the system call instruction required
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for that system call number.
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.Pp
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.Fn pinsyscalls
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is only called by the shared library linker
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.Xr ld.so 1
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to tell the kernel where system calls are found in the dynamic library
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.Pa libc.so
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(the filename is actually /usr/lib/libc.so.major.minor).
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.Pp
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A similar setup operation is done automatically by the kernel for
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the system calls found in
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.Xr ld.so 1
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and in static executables.
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.Pp
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Once the kernel knows the specific location in the address space where
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a specific system call must be entered from, any attempt to use a different
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system call entry instruction to perform a non-corresponding system call
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operation will fail with signal
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.Dv SIGABRT .
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.Sh RETURN VALUES
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.Rv -std
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.Sh ERRORS
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.Fn pinsyscalls
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Process already has a system call pinning table loaded.
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.It Bq Er EPERM
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A static binary tried to call
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.Fn pinsyscalls .
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.It Bq Er ERANGE
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At least one system call offset is out of bounds.
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.El
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.Sh HISTORY
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The
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.Fn pinsyscalls
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system call first appeared in
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.Ox 7.4 .
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