diff options
Diffstat (limited to 'lib/libsys/i386')
25 files changed, 1420 insertions, 0 deletions
diff --git a/lib/libsys/i386/Makefile.sys b/lib/libsys/i386/Makefile.sys new file mode 100644 index 000000000000..2957dc548cf8 --- /dev/null +++ b/lib/libsys/i386/Makefile.sys @@ -0,0 +1,15 @@ +SRCS+= i386_get_fsbase.c i386_get_gsbase.c i386_get_ioperm.c i386_get_ldt.c \ + i386_set_fsbase.c i386_set_gsbase.c i386_set_ioperm.c i386_set_ldt.c \ + i386_clr_watch.c i386_set_watch.c i386_vm86.c \ + rfork_thread.S + +MDASM= vfork.S cerror.S getcontext.S syscall.S + +.if ${LIB} == "sys" +MAN+= i386_get_ioperm.2 i386_get_ldt.2 i386_vm86.2 +MAN+= i386_set_watch.3 + +MLINKS+=i386_get_ioperm.2 i386_set_ioperm.2 +MLINKS+=i386_get_ldt.2 i386_set_ldt.2 +MLINKS+=i386_set_watch.3 i386_clr_watch.3 +.endif # ${LIB} == "sys" diff --git a/lib/libsys/i386/Makefile.thr b/lib/libsys/i386/Makefile.thr new file mode 100644 index 000000000000..52e861709faf --- /dev/null +++ b/lib/libsys/i386/Makefile.thr @@ -0,0 +1 @@ +SRCS+= _umtx_op_err.S diff --git a/lib/libsys/i386/SYS.h b/lib/libsys/i386/SYS.h new file mode 100644 index 000000000000..f5e0565452da --- /dev/null +++ b/lib/libsys/i386/SYS.h @@ -0,0 +1,58 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/syscall.h> +#include <machine/asm.h> + +#define _SYSCALL(name) \ + mov $SYS_##name, %eax; \ + int $0x80 + +#ifndef _SYSCALL_BODY +#define _SYSCALL_BODY(name) \ + _SYSCALL(name); \ + jb HIDENAME(cerror); \ + ret +#endif + +#define RSYSCALL(name) ENTRY(__sys_##name); \ + WEAK_REFERENCE(__sys_##name, name); \ + WEAK_REFERENCE(__sys_##name, _##name); \ + _SYSCALL_BODY(name); \ + END(__sys_##name) + +#define PSEUDO(name) ENTRY(__sys_##name); \ + WEAK_REFERENCE(__sys_##name, _##name); \ + _SYSCALL_BODY(name); \ + END(__sys_##name) diff --git a/lib/libsys/i386/Symbol.sys.map b/lib/libsys/i386/Symbol.sys.map new file mode 100644 index 000000000000..6b3169336a3f --- /dev/null +++ b/lib/libsys/i386/Symbol.sys.map @@ -0,0 +1,25 @@ +FBSD_1.0 { + i386_clr_watch; + i386_get_fsbase; + i386_get_gsbase; + i386_get_ioperm; + i386_get_ldt; + i386_set_fsbase; + i386_set_gsbase; + i386_set_ioperm; + i386_set_ldt; + i386_set_watch; + i386_vm86; + rfork_thread; +}; + +FBSD_1.6 { + x86_pkru_get_perm; + x86_pkru_protect_range; + x86_pkru_set_perm; + x86_pkru_unprotect_range; +}; + +FBSDprivate_1.0 { + _vfork; +}; diff --git a/lib/libsys/i386/_umtx_op_err.S b/lib/libsys/i386/_umtx_op_err.S new file mode 100644 index 000000000000..460bd72604aa --- /dev/null +++ b/lib/libsys/i386/_umtx_op_err.S @@ -0,0 +1,39 @@ +/*- + * Copyright (C) 2008 David Xu <davidxu@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Neither the name of the author nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/asm.h> +#include <sys/syscall.h> + +#define SYSCALL_ERR(x) \ + ENTRY(__CONCAT(x, _err)); \ + mov __CONCAT($SYS_,x),%eax; \ + int $0x80; \ + ret; \ + END(__CONCAT(x, _err)) + +SYSCALL_ERR(_umtx_op) + + .section .note.GNU-stack,"",%progbits diff --git a/lib/libsys/i386/cerror.S b/lib/libsys/i386/cerror.S new file mode 100644 index 000000000000..6e7015edabc4 --- /dev/null +++ b/lib/libsys/i386/cerror.S @@ -0,0 +1,63 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/asm.h> +#include "SYS.h" + + .globl HIDENAME(cerror) + .hidden HIDENAME(cerror) + + /* + * The __error() function is thread aware. For non-threaded + * programs and the initial thread in threaded programs, + * it returns a pointer to the global errno variable. + */ + .globl CNAME(__error) + .type CNAME(__error),@function +HIDENAME(cerror): +#ifdef PIC + PIC_PROLOGUE + pushl %eax + call PIC_PLT(CNAME(__error)) + popl %ecx + PIC_EPILOGUE +#else + pushl %eax + call CNAME(__error) + popl %ecx +#endif + movl %ecx,(%eax) + movl $-1,%eax + movl $-1,%edx + ret + + .section .note.GNU-stack,"",%progbits diff --git a/lib/libsys/i386/getcontext.S b/lib/libsys/i386/getcontext.S new file mode 100644 index 000000000000..d6b5dcd58669 --- /dev/null +++ b/lib/libsys/i386/getcontext.S @@ -0,0 +1,45 @@ +/*- + * Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/asm.h> +#include <SYS.h> + +/* + * This has to be magic to handle the multiple returns. + * Otherwise, the setcontext() syscall will return here and we'll + * pop off the return address and go to the *setcontext* call. + */ + WEAK_REFERENCE(__sys_getcontext, _getcontext) + WEAK_REFERENCE(__sys_getcontext, getcontext) +ENTRY(__sys_getcontext) + movl (%esp),%ecx /* save getcontext return address */ + _SYSCALL(getcontext) + jb HIDENAME(cerror) + addl $4,%esp /* remove stale (setcontext) return address */ + jmp *%ecx /* restore return address */ +END(__sys_getcontext) + + .section .note.GNU-stack,"",%progbits diff --git a/lib/libsys/i386/i386_clr_watch.c b/lib/libsys/i386/i386_clr_watch.c new file mode 100644 index 000000000000..f01b340d81e0 --- /dev/null +++ b/lib/libsys/i386/i386_clr_watch.c @@ -0,0 +1,45 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright 2000 Brian S. Dean <bsd@bsdhome.com> + * All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY BRIAN S. DEAN ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BRIAN S. DEAN BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + */ + +#include <machine/reg.h> +#include <machine/sysarch.h> + +int +i386_clr_watch(int watchnum, struct dbreg * d) +{ + + if (watchnum < 0 || watchnum >= 4) + return -1; + + DBREG_DRX(d,7) = DBREG_DRX(d,7) & ~((0x3 << (watchnum*2)) | (0x0f << (watchnum*4+16))); + DBREG_DRX(d,watchnum) = 0; + + return 0; +} diff --git a/lib/libsys/i386/i386_get_fsbase.c b/lib/libsys/i386/i386_get_fsbase.c new file mode 100644 index 000000000000..b60c6af5ff55 --- /dev/null +++ b/lib/libsys/i386/i386_get_fsbase.c @@ -0,0 +1,36 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2005 Peter Wemm + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/sysarch.h> + +int +i386_get_fsbase(void **addr) +{ + + return (sysarch(I386_GET_FSBASE, addr)); +} diff --git a/lib/libsys/i386/i386_get_gsbase.c b/lib/libsys/i386/i386_get_gsbase.c new file mode 100644 index 000000000000..fd8187d83437 --- /dev/null +++ b/lib/libsys/i386/i386_get_gsbase.c @@ -0,0 +1,36 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2005 Peter Wemm + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/sysarch.h> + +int +i386_get_gsbase(void **addr) +{ + + return (sysarch(I386_GET_GSBASE, addr)); +} diff --git a/lib/libsys/i386/i386_get_ioperm.2 b/lib/libsys/i386/i386_get_ioperm.2 new file mode 100644 index 000000000000..decdf8379ac3 --- /dev/null +++ b/lib/libsys/i386/i386_get_ioperm.2 @@ -0,0 +1,85 @@ +.\" Copyright (c) 1998 Jonathan Lemon +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.Dd July 27, 1998 +.Dt I386_GET_IOPERM 2 +.Os +.Sh NAME +.Nm i386_get_ioperm , +.Nm i386_set_ioperm +.Nd manage per-process access to the i386 I/O port space +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In machine/sysarch.h +.Ft int +.Fn i386_get_ioperm "unsigned int start" "unsigned int *length" "int *enable" +.Ft int +.Fn i386_set_ioperm "unsigned int start" "unsigned int length" "int enable" +.Sh DESCRIPTION +The +.Fn i386_get_ioperm +system call +will return the permission for the process' I/O port space in the +.Fa *enable +argument. +The port range starts at +.Fa start +and the number of contiguous entries will be returned in +.Fa *length . +.Pp +The +.Fn i386_set_ioperm +system call +will set access to a range of I/O ports described by the +.Fa start +and +.Fa length +arguments to the state specified by the +.Fa enable +argument. +.Sh RETURN VALUES +.Rv -std +.Sh ERRORS +The +.Fn i386_get_ioperm +and +.Fn i386_set_ioperm +system calls +will fail if: +.Bl -tag -width Er +.It Bq Er EINVAL +An invalid range was specified by the +.Fa start +or +.Fa length +arguments. +.It Bq Er EPERM +The caller of i386_set_ioperm was not the superuser. +.El +.Sh SEE ALSO +.Xr io 4 +.Sh AUTHORS +This man page was written by +.An Jonathan Lemon . diff --git a/lib/libsys/i386/i386_get_ioperm.c b/lib/libsys/i386/i386_get_ioperm.c new file mode 100644 index 000000000000..6adfe2bedf6c --- /dev/null +++ b/lib/libsys/i386/i386_get_ioperm.c @@ -0,0 +1,47 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 1998 Jonathan Lemon + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/sysarch.h> + +int +i386_get_ioperm(unsigned int start, unsigned int *length, int *enable) +{ + struct i386_ioperm_args p; + int error; + + p.start = start; + p.length = *length; + p.enable = *enable; + + error = sysarch(I386_GET_IOPERM, &p); + + *length = p.length; + *enable = p.enable; + + return (error); +} diff --git a/lib/libsys/i386/i386_get_ldt.2 b/lib/libsys/i386/i386_get_ldt.2 new file mode 100644 index 000000000000..0884fd8cfea1 --- /dev/null +++ b/lib/libsys/i386/i386_get_ldt.2 @@ -0,0 +1,136 @@ +.\" Copyright (c) 1980, 1991 Regents of the University of California. +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.Dd October 14, 2006 +.Dt I386_GET_LDT 2 +.Os +.Sh NAME +.Nm i386_get_ldt , +.Nm i386_set_ldt +.Nd manage i386 per-process Local Descriptor Table entries +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In machine/segments.h +.In machine/sysarch.h +.Ft int +.Fn i386_get_ldt "int start_sel" "union descriptor *descs" "int num_sels" +.Ft int +.Fn i386_set_ldt "int start_sel" "union descriptor *descs" "int num_sels" +.Sh DESCRIPTION +The +.Fn i386_get_ldt +system call +returns a list of the i386 descriptors in the current process' +LDT. +The +.Fn i386_set_ldt +system call +sets a list of i386 descriptors in the current process' +LDT. +For both routines, +.Fa start_sel +specifies the index of the selector in the LDT at which to begin and +.Fa descs +points to an array of +.Fa num_sels +descriptors to be set or returned. +.Pp +Each entry in the +.Fa descs +array can be either a segment_descriptor or gate_descriptor and are defined in +.In i386/segments.h . +These structures are defined by the architecture +as disjoint bit-fields, so care must be taken in constructing them. +.Pp +If +.Fa start_sel +is +.Em LDT_AUTO_ALLOC , +.Fa num_sels +is 1 and the descriptor pointed to by +.Fa descs +is legal, then +.Fn i386_set_ldt +will allocate a descriptor and return its +selector number. +.Pp +If +.Fa num_descs +is 1, +.Fa start_sels +is valid, and +.Fa descs +is NULL, then +.Fn i386_set_ldt +will free that descriptor +(making it available to be reallocated again later). +.Pp +If +.Fa num_descs +is 0, +.Fa start_sels +is 0 and +.Fa descs +is NULL then, as a special case, +.Fn i386_set_ldt +will free all descriptors. +.Sh RETURN VALUES +Upon successful completion, +.Fn i386_get_ldt +returns the number of descriptors currently in the LDT. +The +.Fn i386_set_ldt +system call +returns the first selector set on success. +If the kernel allocated a descriptor in the LDT, +the allocated index is returned. +Otherwise, a value of -1 is returned and the global +variable +.Va errno +is set to indicate the error. +.Sh ERRORS +The +.Fn i386_get_ldt +and +.Fn i386_set_ldt +system calls +will fail if: +.Bl -tag -width Er +.It Bq Er EINVAL +An inappropriate value was used for +.Fa start_sel +or +.Fa num_sels . +.It Bq Er EACCES +The caller attempted to use a descriptor that would +circumvent protection or cause a failure. +.El +.Sh SEE ALSO +i386 Microprocessor Programmer's Reference Manual, Intel +.Sh WARNING +You can really hose your process using this. diff --git a/lib/libsys/i386/i386_get_ldt.c b/lib/libsys/i386/i386_get_ldt.c new file mode 100644 index 000000000000..8021476434d6 --- /dev/null +++ b/lib/libsys/i386/i386_get_ldt.c @@ -0,0 +1,45 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1993 John Brezak + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +#include <machine/segments.h> +#include <machine/sysarch.h> + +int +i386_get_ldt(int start, union descriptor *descs, int num) +{ + struct i386_ldt_args p; + + p.start = start; + p.descs = descs; + p.num = num; + + return sysarch(I386_GET_LDT, &p); +} diff --git a/lib/libsys/i386/i386_set_fsbase.c b/lib/libsys/i386/i386_set_fsbase.c new file mode 100644 index 000000000000..8420f492a5d5 --- /dev/null +++ b/lib/libsys/i386/i386_set_fsbase.c @@ -0,0 +1,36 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2005 Peter Wemm + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/sysarch.h> + +int +i386_set_fsbase(void *addr) +{ + + return (sysarch(I386_SET_FSBASE, &addr)); +} diff --git a/lib/libsys/i386/i386_set_gsbase.c b/lib/libsys/i386/i386_set_gsbase.c new file mode 100644 index 000000000000..779b2e74eb3f --- /dev/null +++ b/lib/libsys/i386/i386_set_gsbase.c @@ -0,0 +1,36 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2005 Peter Wemm + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/sysarch.h> + +int +i386_set_gsbase(void *addr) +{ + + return (sysarch(I386_SET_GSBASE, &addr)); +} diff --git a/lib/libsys/i386/i386_set_ioperm.c b/lib/libsys/i386/i386_set_ioperm.c new file mode 100644 index 000000000000..b65f62fe44bb --- /dev/null +++ b/lib/libsys/i386/i386_set_ioperm.c @@ -0,0 +1,41 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 1998 Jonathan Lemon + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/sysarch.h> + +int +i386_set_ioperm(unsigned int start, unsigned int length, int enable) +{ + struct i386_ioperm_args p; + + p.start = start; + p.length = length; + p.enable = enable; + + return (sysarch(I386_SET_IOPERM, &p)); +} diff --git a/lib/libsys/i386/i386_set_ldt.c b/lib/libsys/i386/i386_set_ldt.c new file mode 100644 index 000000000000..ac363e45d769 --- /dev/null +++ b/lib/libsys/i386/i386_set_ldt.c @@ -0,0 +1,45 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1993 John Brezak + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +#include <machine/segments.h> +#include <machine/sysarch.h> + +int +i386_set_ldt(int start, union descriptor *descs, int num) +{ + struct i386_ldt_args p; + + p.start = start; + p.descs = descs; + p.num = num; + + return sysarch(I386_SET_LDT, &p); +} diff --git a/lib/libsys/i386/i386_set_watch.3 b/lib/libsys/i386/i386_set_watch.3 new file mode 100644 index 000000000000..265c21119c53 --- /dev/null +++ b/lib/libsys/i386/i386_set_watch.3 @@ -0,0 +1,116 @@ +.\" Copyright (c) 2000 Brian S. Dean +.\" All rights reserved. +.\" +.\" This man-page is based on a similar man-page by Jonathan Lemon +.\" which is copyrighted under the following conditions: +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.Dd August 24, 2000 +.Dt I386_SET_WATCH 3 +.Os +.Sh NAME +.Nm i386_clr_watch , +.Nm i386_set_watch +.Nd manage i386 debug register values +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In machine/reg.h +.In machine/sysarch.h +.Ft int +.Fn i386_clr_watch "int watchnum" "struct dbreg *d" +.Ft int +.Fn i386_set_watch "int watchnum" "unsigned int watchaddr" "int size" "int access" "struct dbreg *d" +.Sh DESCRIPTION +The +.Fn i386_clr_watch +function +will disable the indicated watch point within the specified debug +register set. +.Pp +The +.Fn i386_set_watch +function +will set up the specified debug registers as indicated by the +arguments. +The +.Fa watchnum +argument specifies which watch register is used, 0, 1, 2, 3, or \-1. +If +.Fa watchnum +is \-1, a free watch register is found and used. +If there are no free +watch registers, an error code of \-1 is returned. +The +.Fa watchaddr +argument +specifies the watch address, +.Fa size +specifies the size in bytes of the area to be watched (1, 2, or 4 bytes), +and +.Fa access +specifies the type of watch point: +.Pp +.Bd -literal -offset indent -compact +DBREG_DR7_EXEC An execution breakpoint. +DBREG_DR7_WRONLY Break only when the watch area is written to. +DBREG_DR7_RDWR Break when the watch area is read from or written + to. +.Ed +.Pp +Note that these functions do not actually set or clear breakpoints; +they manipulate the indicated debug register set. +You must use +.Xr ptrace 2 +to retrieve and install the debug register values for a process. +.Sh RETURN VALUES +On success, the +.Fn i386_clr_watch +function returns 0. +On error, \-1 returned which indicates that +.Fa watchnum +is invalid (not in the range of 0-3). +If the specified watchnum was already disabled, no error is returned. +.Pp +On success, the +.Fn i386_set_watch +function returns the +.Fa watchnum +argument, or the watchnum actually used in the case where the specified +.Fa watchnum +was \-1. +On error, the +.Fn i386_set_watch +function returns \-1 indicating that the watchpoint could not established +because either no more watchpoints are available, or +.Fa watchnum , +.Fa size , +or +.Fa access +is invalid. +.Sh SEE ALSO +.Xr ptrace 2 , +.Xr procfs 4 +.Sh AUTHORS +This man page was written by +.An Brian S. Dean . diff --git a/lib/libsys/i386/i386_set_watch.c b/lib/libsys/i386/i386_set_watch.c new file mode 100644 index 000000000000..acdcd79720e3 --- /dev/null +++ b/lib/libsys/i386/i386_set_watch.c @@ -0,0 +1,83 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright 2000 Brian S. Dean <bsd@bsdhome.com> + * All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY BRIAN S. DEAN ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BRIAN S. DEAN BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + */ + +#include <machine/reg.h> +#include <machine/sysarch.h> + +int +i386_set_watch(int watchnum, unsigned int watchaddr, int size, + int access, struct dbreg * d) +{ + int i; + unsigned int mask; + + if (watchnum == -1) { + for (i = 0, mask = 0x3; i < 4; i++, mask <<= 2) + if ((DBREG_DRX(d,7) & mask) == 0) + break; + if (i < 4) + watchnum = i; + else + return -1; + } + + switch (access) { + case DBREG_DR7_EXEC: + size = 1; /* size must be 1 for an execution breakpoint */ + /* fall through */ + case DBREG_DR7_WRONLY: + case DBREG_DR7_RDWR: + break; + default : return -1; break; + } + + /* + * we can watch a 1, 2, or 4 byte sized location + */ + switch (size) { + case 1 : mask = 0x00; break; + case 2 : mask = 0x01 << 2; break; + case 4 : mask = 0x03 << 2; break; + default : return -1; break; + } + + mask |= access; + + /* clear the bits we are about to affect */ + DBREG_DRX(d,7) &= ~((0x3 << (watchnum*2)) | (0x0f << (watchnum*4+16))); + + /* set drN register to the address, N=watchnum */ + DBREG_DRX(d,watchnum) = watchaddr; + + /* enable the watchpoint */ + DBREG_DRX(d,7) |= (0x2 << (watchnum*2)) | (mask << (watchnum*4+16)); + + return watchnum; +} diff --git a/lib/libsys/i386/i386_vm86.2 b/lib/libsys/i386/i386_vm86.2 new file mode 100644 index 000000000000..bbfb5a9b2ebc --- /dev/null +++ b/lib/libsys/i386/i386_vm86.2 @@ -0,0 +1,139 @@ +.\" Copyright (c) 1998 Jonathan Lemon +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.Dd July 27, 1998 +.Dt I386_VM86 2 +.Os +.Sh NAME +.Nm i386_vm86 +.Nd control vm86-related functions +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In sys/types.h +.In machine/sysarch.h +.In machine/vm86.h +.Ft int +.Fn i386_vm86 "int function" "void *data" +.Sh DESCRIPTION +The +.Fn i386_vm86 +system call +is used to call various vm86 related functions. +The +.Fa function +argument +can be one of the following values: +.Bl -tag -offset indent -width VM86_SET_VME +.It Dv VM86_INIT +This will initialize the kernel's vm86 parameter area for the +process, and permit the process to make vm86 calls. +The +.Fa data +argument +points to the following structure: +.Bd -literal +struct vm86_init_args { + int debug; + int cpu_type; + u_char int_map[32]; +}; +.Ed +.Pp +The +.Fa debug +argument +is used to turn on debugging code. +The +.Fa cpu_type +argument +controls the type of CPU being emulated, and is currently unimplemented. +The +.Fa int_map +argument +is a bitmap which determines whether vm86 interrupts should be handled +in vm86 mode, or reflected back to the process. +If the +.Em Nth +bit is set, the interrupt will be reflected to the process, otherwise +it will be dispatched by the vm86 interrupt table. +.It Dv VM86_INTCALL +This allows calls to be made to vm86 interrupt handlers by the process. +It effectively simulates an INT instruction. +.Fa data +should point to the following structure: +.Bd -literal +struct vm86_intcall_args { + int intnum; + struct vm86frame vmf; +}; +.Ed +.Pp +.Fa intnum +specifies the operand of INT for the simulated call. +A value of 0x10, for example, would often be used to call into the VGA BIOS. +.Fa vmf +is used to initialize CPU registers according to the calling convention for +the interrupt handler. +.It Dv VM86_GET_VME +This is used to retrieve the current state of the Pentium(r) processor's +VME (Virtual-8086 Mode Extensions) flag, which is bit 0 of CR4. +.Fa data +should be initialized to point to the following: +.Bd -literal +struct vm86_vme_args { + int state; /* status */ +}; +.Ed +.Pp +.Fa state +will contain the state of the VME flag on return. +.\" .It Dv VM86_SET_VME +.El +.Pp +vm86 mode is entered by calling +.Xr sigreturn 2 +with the correct machine context for vm86, and with the +.Dv PSL_VM +bit set. +Control returns to the process upon delivery of a signal. +.Sh RETURN VALUES +.Rv -std i386_vm86 +.Sh ERRORS +The +.Fn i386_vm86 +system call +will fail if: +.Bl -tag -width Er +.It Bq Er EINVAL +The kernel does not have vm86 support, or an invalid function was specified. +.It Bq Er ENOMEM +There is not enough memory to initialize the kernel data structures. +.El +.Sh AUTHORS +.An -nosplit +This man page was written by +.An Jonathan Lemon , +and updated by +.An Bruce M Simpson . diff --git a/lib/libsys/i386/i386_vm86.c b/lib/libsys/i386/i386_vm86.c new file mode 100644 index 000000000000..fab2a3080ccd --- /dev/null +++ b/lib/libsys/i386/i386_vm86.c @@ -0,0 +1,40 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 1998 Jonathan Lemon + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/sysarch.h> + +int +i386_vm86(int fcn, void *data) +{ + struct i386_vm86_args p; + + p.sub_op = fcn; + p.sub_args = (char *)data; + + return (sysarch(I386_VM86, &p)); +} diff --git a/lib/libsys/i386/rfork_thread.S b/lib/libsys/i386/rfork_thread.S new file mode 100644 index 000000000000..b37f16c930e8 --- /dev/null +++ b/lib/libsys/i386/rfork_thread.S @@ -0,0 +1,111 @@ +/*- + * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/asm.h> +/* + * With thanks to John Dyson for the original version of this. + */ + +#include <SYS.h> + +/* + * 8 12 16 20 + * rfork_thread(flags, stack_addr, start_fnc, start_arg); + * + * flags: Flags to rfork system call. See rfork(2). + * stack_addr: Top of stack for thread. + * start_fnc: Address of thread function to call in child. + * start_arg: Argument to pass to the thread function in child. + */ + +ENTRY(rfork_thread) + pushl %ebp + movl %esp, %ebp + pushl %esi + + /* + * Push thread info onto the new thread's stack + */ + movl 12(%ebp), %esi # get stack addr + + subl $4, %esi + movl 20(%ebp), %eax # get start argument + movl %eax, (%esi) + + subl $4, %esi + movl 16(%ebp), %eax # get start thread address + movl %eax, (%esi) + + /* + * Prepare and execute the thread creation syscall + */ + pushl 8(%ebp) + pushl $0 + _SYSCALL(rfork) + jb 2f + + /* + * Check to see if we are in the parent or child + */ + cmpl $0, %edx + jnz 1f + addl $8, %esp + popl %esi + movl %ebp, %esp + popl %ebp + ret + .p2align 2 + + /* + * If we are in the child (new thread), then + * set-up the call to the internal subroutine. If it + * returns, then call __exit. + */ +1: + movl %esi,%esp + popl %eax + call *%eax + addl $4, %esp + + /* + * Exit system call + */ + pushl %eax + pushl $0 + _SYSCALL(exit) + + /* + * Branch here if the thread creation fails: + */ +2: + addl $8, %esp + popl %esi + movl %ebp, %esp + popl %ebp + jmp HIDENAME(cerror) +END(rfork_thread) + + .section .note.GNU-stack,"",%progbits diff --git a/lib/libsys/i386/syscall.S b/lib/libsys/i386/syscall.S new file mode 100644 index 000000000000..bed7156e28ac --- /dev/null +++ b/lib/libsys/i386/syscall.S @@ -0,0 +1,49 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/asm.h> +#include "SYS.h" + +ENTRY(syscall) + pop %ecx /* rta */ + pop %eax /* syscall number */ + push %ecx + int $0x80 + push %ecx /* need to push a word to keep stack frame intact + upon return; the word must be the return address. */ + jb HIDENAME(cerror) + ret +END(syscall) + +PSEUDO(syscall) + + .section .note.GNU-stack,"",%progbits diff --git a/lib/libsys/i386/vfork.S b/lib/libsys/i386/vfork.S new file mode 100644 index 000000000000..3399b8b752de --- /dev/null +++ b/lib/libsys/i386/vfork.S @@ -0,0 +1,48 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <machine/asm.h> +#include "SYS.h" + + WEAK_REFERENCE(__sys_vfork, _vfork) + WEAK_REFERENCE(__sys_vfork, vfork) +ENTRY(__sys_vfork) + popl %ecx /* my rta into ecx */ + _SYSCALL(vfork) + jb 1f + jmp *%ecx +1: + pushl %ecx + jmp HIDENAME(cerror) +END(__sys_vfork) + + .section .note.GNU-stack,"",%progbits |