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NetBSD/sys/compat/osf1/osf1_exec.c

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add support for non-executable mappings (where the hardware allows this) and make the stack and heap non-executable by default. the changes fall into two basic catagories: - pmap and trap-handler changes. these are all MD: = alpha: we already track per-page execute permission with the (software) PG_EXEC bit, so just have the trap handler pay attention to it. = i386: use a new GDT segment for %cs for processes that have no executable mappings above a certain threshold (currently the bottom of the stack). track per-page execute permission with the last unused PTE bit. = powerpc/ibm4xx: just use the hardware exec bit. = powerpc/oea: we already track per-page exec bits, but the hardware only implements non-exec mappings at the segment level. so track the number of executable mappings in each segment and turn on the no-exec segment bit iff the count is 0. adjust the trap handler to deal. = sparc (sun4m): fix our use of the hardware protection bits. fix the trap handler to recognize text faults. = sparc64: split the existing unified TSB into data and instruction TSBs, and only load TTEs into the appropriate TSB(s) for the permissions. fix the trap handler to check for execute permission. = not yet implemented: amd64, hppa, sh5 - changes in all the emulations that put a signal trampoline on the stack. instead, we now put the trampoline into a uvm_aobj and map that into the process separately. originally from openbsd, adapted for netbsd by me.
2003-08-24 21:52:28 +04:00
/* $NetBSD: osf1_exec.c,v 1.32 2003/08/24 17:52:44 chs Exp $ */
exec internals have been moved (and improved) to osf1_exec.c. Not much there yet, but more to come.
1999-04-26 22:34:05 +04:00
/*
* Copyright (c) 1999 Christopher G. Demetriou. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou
* for the NetBSD Project.
* 4. 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.
*/
add RCSIDs (including regeneration of files as appropriate)
2001-11-13 05:07:52 +03:00
#include <sys/cdefs.h>
add support for non-executable mappings (where the hardware allows this) and make the stack and heap non-executable by default. the changes fall into two basic catagories: - pmap and trap-handler changes. these are all MD: = alpha: we already track per-page execute permission with the (software) PG_EXEC bit, so just have the trap handler pay attention to it. = i386: use a new GDT segment for %cs for processes that have no executable mappings above a certain threshold (currently the bottom of the stack). track per-page execute permission with the last unused PTE bit. = powerpc/ibm4xx: just use the hardware exec bit. = powerpc/oea: we already track per-page exec bits, but the hardware only implements non-exec mappings at the segment level. so track the number of executable mappings in each segment and turn on the no-exec segment bit iff the count is 0. adjust the trap handler to deal. = sparc (sun4m): fix our use of the hardware protection bits. fix the trap handler to recognize text faults. = sparc64: split the existing unified TSB into data and instruction TSBs, and only load TTEs into the appropriate TSB(s) for the permissions. fix the trap handler to check for execute permission. = not yet implemented: amd64, hppa, sh5 - changes in all the emulations that put a signal trampoline on the stack. instead, we now put the trampoline into a uvm_aobj and map that into the process separately. originally from openbsd, adapted for netbsd by me.
2003-08-24 21:52:28 +04:00
__KERNEL_RCSID(0, "$NetBSD: osf1_exec.c,v 1.32 2003/08/24 17:52:44 chs Exp $");
add RCSIDs (including regeneration of files as appropriate)
2001-11-13 05:07:52 +03:00
exec internals have been moved (and improved) to osf1_exec.c. Not much there yet, but more to come.
1999-04-26 22:34:05 +04:00
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
pull <sys/exec.h> to get setregs prototype. problem noted by Chuck Silvers
2001-09-23 23:32:10 +04:00
#include <sys/exec.h>
exec internals have been moved (and improved) to osf1_exec.c. Not much there yet, but more to come.
1999-04-26 22:34:05 +04:00
#include <compat/osf1/osf1.h>
#include <compat/osf1/osf1_syscall.h>
shuffle bits around. separate conversion conversion functions and tables from the code that uses them, just as I previously separated out the OSF/1 definitions and structures from the code that translates to and from them.
1999-05-01 06:57:08 +04:00
#include <compat/osf1/osf1_cvt.h>
do special OSF/1-specific ECOFF recognition (not yet complete), and implement a copyargs function to do special argument copying for emulated processes.
1999-04-27 05:45:03 +04:00
exec internals have been moved (and improved) to osf1_exec.c. Not much there yet, but more to come.
1999-04-26 22:34:05 +04:00
extern struct sysent osf1_sysent[];
change the type of *syscallnames[] array to 'const char * const foo[]'
2000-11-14 00:32:15 +03:00
extern const char * const osf1_syscallnames[];
use osf1-specific sigcode
1999-04-30 05:46:09 +04:00
extern char osf1_sigcode[], osf1_esigcode[];
Do the md_syscall, __HAVE_MINIMAL_EMUL and __HAVE_SYSCALL_INTERN thangs.
2000-12-13 06:16:36 +03:00
#ifdef __HAVE_SYSCALL_INTERN
void osf1_syscall_intern __P((struct proc *));
#else
always fill in e_syscall in respective emul_*; if the emulation doesn't have it's own separated *_syscall() function, use syscall()
2000-12-09 15:38:23 +03:00
void syscall __P((void));
Do the md_syscall, __HAVE_MINIMAL_EMUL and __HAVE_SYSCALL_INTERN thangs.
2000-12-13 06:16:36 +03:00
#endif
exec internals have been moved (and improved) to osf1_exec.c. Not much there yet, but more to come.
1999-04-26 22:34:05 +04:00
add support for non-executable mappings (where the hardware allows this) and make the stack and heap non-executable by default. the changes fall into two basic catagories: - pmap and trap-handler changes. these are all MD: = alpha: we already track per-page execute permission with the (software) PG_EXEC bit, so just have the trap handler pay attention to it. = i386: use a new GDT segment for %cs for processes that have no executable mappings above a certain threshold (currently the bottom of the stack). track per-page execute permission with the last unused PTE bit. = powerpc/ibm4xx: just use the hardware exec bit. = powerpc/oea: we already track per-page exec bits, but the hardware only implements non-exec mappings at the segment level. so track the number of executable mappings in each segment and turn on the no-exec segment bit iff the count is 0. adjust the trap handler to deal. = sparc (sun4m): fix our use of the hardware protection bits. fix the trap handler to recognize text faults. = sparc64: split the existing unified TSB into data and instruction TSBs, and only load TTEs into the appropriate TSB(s) for the permissions. fix the trap handler to check for execute permission. = not yet implemented: amd64, hppa, sh5 - changes in all the emulations that put a signal trampoline on the stack. instead, we now put the trampoline into a uvm_aobj and map that into the process separately. originally from openbsd, adapted for netbsd by me.
2003-08-24 21:52:28 +04:00
struct uvm_object *emul_osf1_object;
restructure struct emul and execsw, in preparation to make emulations LKMable: * move all exec-type specific information from struct emul to execsw[] and provide single struct emul per emulation * elf: - kern/exec_elf32.c:probe_funcs[] is gone, execsw[] how has one entry per emulation and contains pointer to respective probe function - interp is allocated via MALLOC() rather than on stack - elf_args structure is allocated via MALLOC() rather than malloc() * ecoff: the per-emulation hooks moved from alpha and mips specific code to OSF1 and Ultrix compat code as appropriate, execsw[] has one entry per emulation supporting ecoff with appropriate probe function * the makecmds/probe functions don't set emulation, pointer to emulation is part of appropriate execsw[] entry * constify couple of structures
2000-11-21 03:37:49 +03:00
const struct emul emul_osf1 = {
exec internals have been moved (and improved) to osf1_exec.c. Not much there yet, but more to come.
1999-04-26 22:34:05 +04:00
"osf1",
add e_path (emulation path) to struct emul, which replaces emulation-specific *_emul_path variables change macros CHECK_ALT_{CREAT|EXIST} to use that, 'root' doesn't need to be passed explicitly any more and *_CHECK_ALT_{CREAT|EXIST} are removed change explicit emul_find() calls in probe functions to get the emulation path from the checked exec switch entry's emulation remove no longer needed header files add e_flags and e_syscall to struct emul; these are unsed and empty for now
2000-12-01 15:28:30 +03:00
"/emul/osf1",
Do the md_syscall, __HAVE_MINIMAL_EMUL and __HAVE_SYSCALL_INTERN thangs.
2000-12-13 06:16:36 +03:00
#ifndef __HAVE_MINIMAL_EMUL
Removed obsoletes EMUL_NO_BSD_ASYNCIO_PIPE and EMUL_NO_SIGIO_ON_READ flags. Async I/O OS specifities should now handled in OS specific code. Linux has been done, but other emulation should be handled. See case LINUX_F_SETFL in sys/compat/linux/common/linux_file.c:linux_sys_fcntl() for more details. The data that has been collected yet: Net Free Open Linux SunOS AIX OSF1 Darwin send SIGIO to write end of pipe Y N N N N N Y Y send SIGIO to read end of pipe Y Y N N N ? Y ? send SIGIO to write end of socket Y Y Y N N Y Y Y send SIGIO to read end of socket Y Y Y Y Y ? Y ?
2001-06-17 01:44:27 +04:00
0,
make signal array handling uniform, and put signal arrays in a separate file. This is simular to errno array handling.
2002-04-01 02:22:43 +04:00
(int *)native_to_osf1_errno,
exec internals have been moved (and improved) to osf1_exec.c. Not much there yet, but more to come.
1999-04-26 22:34:05 +04:00
OSF1_SYS_syscall,
set struct emul's nsysent to compat SYS_NSYSENT, not SYS_MAXSYSCALL
2002-11-01 22:26:21 +03:00
OSF1_SYS_NSYSENT,
Do the md_syscall, __HAVE_MINIMAL_EMUL and __HAVE_SYSCALL_INTERN thangs.
2000-12-13 06:16:36 +03:00
#endif
exec internals have been moved (and improved) to osf1_exec.c. Not much there yet, but more to come.
1999-04-26 22:34:05 +04:00
osf1_sysent,
osf1_syscallnames,
Introduce 2 new flags in types.h: * __HAVE_SYSCALL_INTERN. If this is defined, e_syscall is replaced by e_syscall_intern, which is called at key places in the kernel. This can be used to set a MD syscall handler pointer. This obsoletes and replaces the *_HAS_SEPARATED_SYSCALL flags. * __HAVE_MINIMAL_EMUL. If this is defined, certain (deprecated) elements in struct emul are omitted.
2000-12-11 08:28:59 +03:00
sendsig,
Add an e_trapsignal member to struct emul, so that emulated processes can send the appropriate signal depending on the trap type.
2001-06-18 06:00:48 +04:00
trapsignal,
use osf1-specific sigcode
1999-04-30 05:46:09 +04:00
osf1_sigcode,
osf1_esigcode,
add support for non-executable mappings (where the hardware allows this) and make the stack and heap non-executable by default. the changes fall into two basic catagories: - pmap and trap-handler changes. these are all MD: = alpha: we already track per-page execute permission with the (software) PG_EXEC bit, so just have the trap handler pay attention to it. = i386: use a new GDT segment for %cs for processes that have no executable mappings above a certain threshold (currently the bottom of the stack). track per-page execute permission with the last unused PTE bit. = powerpc/ibm4xx: just use the hardware exec bit. = powerpc/oea: we already track per-page exec bits, but the hardware only implements non-exec mappings at the segment level. so track the number of executable mappings in each segment and turn on the no-exec segment bit iff the count is 0. adjust the trap handler to deal. = sparc (sun4m): fix our use of the hardware protection bits. fix the trap handler to recognize text faults. = sparc64: split the existing unified TSB into data and instruction TSBs, and only load TTEs into the appropriate TSB(s) for the permissions. fix the trap handler to check for execute permission. = not yet implemented: amd64, hppa, sh5 - changes in all the emulations that put a signal trampoline on the stack. instead, we now put the trampoline into a uvm_aobj and map that into the process separately. originally from openbsd, adapted for netbsd by me.
2003-08-24 21:52:28 +04:00
&emul_osf1_object,
Make the setregs hook emulation-specific, rather than executable format specific. Struct emul has a e_setregs hook back, which points to emulation-specific setregs function. es_setregs of struct execsw now only points to optional executable-specific setup function (this is only used for ECOFF).
2001-09-18 23:36:32 +04:00
setregs,
emul_osf1: add flags EMUL_GETPID_PASS_PPID|EMUL_GETID_PASS_EID
2000-12-01 22:20:22 +03:00
NULL,
NULL,
NULL,
Do the md_syscall, __HAVE_MINIMAL_EMUL and __HAVE_SYSCALL_INTERN thangs.
2000-12-13 06:16:36 +03:00
#ifdef __HAVE_SYSCALL_INTERN
osf1_syscall_intern,
#else
syscall,
#endif
- Introduce a e_fault field in struct proc to provide emulation specific memory fault handler. IRIX uses irix_vm_fault, and all other emulation use NULL, which means to use uvm_fault. - While we are there, explicitely set to NULL the uninitialized fields in struct emul: e_fault and e_sysctl on most ports - e_fault is used by the trap handler, for now only on mips. In order to avoid intrusive modifications in UVM, the function pointed by e_fault does not has exactly the same protoype as uvm_fault: int uvm_fault __P((struct vm_map *, vaddr_t, vm_fault_t, vm_prot_t)); int e_fault __P((struct proc *, vaddr_t, vm_fault_t, vm_prot_t)); - In IRIX share groups, all the VM space is shared, except one page. This bounds us to have different VM spaces and synchronize modifications to the VM space accross share group members. We need an IRIX specific hook to the page fault handler in order to propagate VM space modifications caused by page faults.
2002-09-22 01:14:54 +04:00
NULL,
NULL,
exec internals have been moved (and improved) to osf1_exec.c. Not much there yet, but more to come.
1999-04-26 22:34:05 +04:00
};
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