freebsd-dev/sys/svr4/svr4_sysvec.c
Mark Newton 196d6399bb Need to #include vm_zone.h to pick up inline definition of zfree() so that
NDFREE() macro from namei.h will be happy.
2000-01-03 20:34:39 +00:00

407 lines
9.9 KiB
C

/*
* Copyright (c) 1998 Mark Newton
* 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 Christos Zoulas.
* 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.
*
* $FreeBSD$
*/
/* XXX we use functions that might not exist. */
#include "opt_compat.h"
#ifndef COMPAT_43
#error "Unable to compile SVR4-emulator due to missing COMPAT_43 option!"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/sysent.h>
#include <sys/imgact.h>
#include <sys/imgact_elf.h>
#include <sys/socket.h>
#include <sys/malloc.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/module.h>
#include <vm/vm.h>
#include <vm/vm_zone.h>
#include <sys/exec.h>
#include <sys/kernel.h>
#include <machine/cpu.h>
#include <netinet/in.h>
#include <svr4/svr4.h>
#include <svr4/svr4_types.h>
#include <svr4/svr4_syscall.h>
#include <svr4/svr4_signal.h>
#include <svr4/svr4_sockio.h>
#include <svr4/svr4_socket.h>
#include <svr4/svr4_errno.h>
#include <svr4/svr4_proto.h>
#include <svr4/svr4_siginfo.h>
#include <svr4/svr4_util.h>
int bsd_to_svr4_errno[ELAST+1] = {
0,
SVR4_EPERM,
SVR4_ENOENT,
SVR4_ESRCH,
SVR4_EINTR,
SVR4_EIO,
SVR4_ENXIO,
SVR4_E2BIG,
SVR4_ENOEXEC,
SVR4_EBADF,
SVR4_ECHILD,
SVR4_EDEADLK,
SVR4_ENOMEM,
SVR4_EACCES,
SVR4_EFAULT,
SVR4_ENOTBLK,
SVR4_EBUSY,
SVR4_EEXIST,
SVR4_EXDEV,
SVR4_ENODEV,
SVR4_ENOTDIR,
SVR4_EISDIR,
SVR4_EINVAL,
SVR4_ENFILE,
SVR4_EMFILE,
SVR4_ENOTTY,
SVR4_ETXTBSY,
SVR4_EFBIG,
SVR4_ENOSPC,
SVR4_ESPIPE,
SVR4_EROFS,
SVR4_EMLINK,
SVR4_EPIPE,
SVR4_EDOM,
SVR4_ERANGE,
SVR4_EAGAIN,
SVR4_EINPROGRESS,
SVR4_EALREADY,
SVR4_ENOTSOCK,
SVR4_EDESTADDRREQ,
SVR4_EMSGSIZE,
SVR4_EPROTOTYPE,
SVR4_ENOPROTOOPT,
SVR4_EPROTONOSUPPORT,
SVR4_ESOCKTNOSUPPORT,
SVR4_EOPNOTSUPP,
SVR4_EPFNOSUPPORT,
SVR4_EAFNOSUPPORT,
SVR4_EADDRINUSE,
SVR4_EADDRNOTAVAIL,
SVR4_ENETDOWN,
SVR4_ENETUNREACH,
SVR4_ENETRESET,
SVR4_ECONNABORTED,
SVR4_ECONNRESET,
SVR4_ENOBUFS,
SVR4_EISCONN,
SVR4_ENOTCONN,
SVR4_ESHUTDOWN,
SVR4_ETOOMANYREFS,
SVR4_ETIMEDOUT,
SVR4_ECONNREFUSED,
SVR4_ELOOP,
SVR4_ENAMETOOLONG,
SVR4_EHOSTDOWN,
SVR4_EHOSTUNREACH,
SVR4_ENOTEMPTY,
SVR4_EPROCLIM,
SVR4_EUSERS,
SVR4_EDQUOT,
SVR4_ESTALE,
SVR4_EREMOTE,
SVR4_EBADRPC,
SVR4_ERPCMISMATCH,
SVR4_EPROGUNAVAIL,
SVR4_EPROGMISMATCH,
SVR4_EPROCUNAVAIL,
SVR4_ENOLCK,
SVR4_ENOSYS,
SVR4_EFTYPE,
SVR4_EAUTH,
SVR4_ENEEDAUTH,
SVR4_EIDRM,
SVR4_ENOMSG,
};
static int svr4_fixup(long **stack_base, struct image_params *imgp);
extern struct sysent svr4_sysent[];
#undef szsigcode
#undef sigcode
extern int svr4_szsigcode;
extern char svr4_sigcode[];
struct sysentvec svr4_sysvec = {
SVR4_SYS_MAXSYSCALL,
svr4_sysent,
0xff,
SVR4_SIGTBLSZ,
bsd_to_svr4_sig,
ELAST, /* ELAST */
bsd_to_svr4_errno,
0,
svr4_fixup,
svr4_sendsig,
svr4_sigcode,
&svr4_szsigcode,
NULL,
"SVR4",
elf_coredump
};
Elf32_Brandinfo svr4_brand = {
"SVR4",
"/compat/svr4",
"/lib/libc.so.1",
&svr4_sysvec
};
const char svr4_emul_path[] = "/compat/svr4";
static int
svr4_fixup(long **stack_base, struct image_params *imgp)
{
Elf32_Auxargs *args = (Elf32_Auxargs *)imgp->auxargs;
long *pos;
pos = *stack_base + (imgp->argc + imgp->envc + 2);
if (args->trace) {
AUXARGS_ENTRY(pos, AT_DEBUG, 1);
}
if (args->execfd != -1) {
AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd);
}
AUXARGS_ENTRY(pos, AT_PHDR, args->phdr);
AUXARGS_ENTRY(pos, AT_PHENT, args->phent);
AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum);
AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz);
AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
AUXARGS_ENTRY(pos, AT_BASE, args->base);
AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_cred->p_ruid);
AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_cred->p_svuid);
AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_cred->p_rgid);
AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_cred->p_svgid);
AUXARGS_ENTRY(pos, AT_NULL, 0);
free(imgp->auxargs, M_TEMP);
imgp->auxargs = NULL;
(*stack_base)--;
**stack_base = (int)imgp->argc;
return 0;
}
/*
* Search an alternate path before passing pathname arguments on
* to system calls. Useful for keeping a seperate 'emulation tree'.
*
* If cflag is set, we check if an attempt can be made to create
* the named file, i.e. we check if the directory it should
* be in exists.
*
* Code shamelessly stolen by Mark Newton from IBCS2 emulation code.
*/
int
svr4_emul_find(p, sgp, prefix, path, pbuf, cflag)
struct proc *p;
caddr_t *sgp; /* Pointer to stackgap memory */
const char *prefix;
char *path;
char **pbuf;
int cflag;
{
struct nameidata nd;
struct nameidata ndroot;
struct vattr vat;
struct vattr vatroot;
int error;
char *ptr, *buf, *cp;
size_t sz, len;
buf = (char *) malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
*pbuf = path;
for (ptr = buf; (*ptr = *prefix) != '\0'; ptr++, prefix++)
continue;
sz = MAXPATHLEN - (ptr - buf);
/*
* If sgp is not given then the path is already in kernel space
*/
if (sgp == NULL)
error = copystr(path, ptr, sz, &len);
else
error = copyinstr(path, ptr, sz, &len);
if (error) {
free(buf, M_TEMP);
return error;
}
if (*ptr != '/') {
free(buf, M_TEMP);
return EINVAL;
}
/*
* We know that there is a / somewhere in this pathname.
* Search backwards for it, to find the file's parent dir
* to see if it exists in the alternate tree. If it does,
* and we want to create a file (cflag is set). We don't
* need to worry about the root comparison in this case.
*/
if (cflag) {
for (cp = &ptr[len] - 1; *cp != '/'; cp--);
*cp = '\0';
NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, buf, p);
if ((error = namei(&nd)) != 0) {
free(buf, M_TEMP);
return error;
}
NDFREE(&nd, NDF_ONLY_PNBUF);
*cp = '/';
}
else {
NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, buf, p);
if ((error = namei(&nd)) != 0) {
free(buf, M_TEMP);
return error;
}
NDFREE(&nd, NDF_ONLY_PNBUF);
/*
* We now compare the vnode of the svr4_root to the one
* vnode asked. If they resolve to be the same, then we
* ignore the match so that the real root gets used.
* This avoids the problem of traversing "../.." to find the
* root directory and never finding it, because "/" resolves
* to the emulation root directory. This is expensive :-(
*/
NDINIT(&ndroot, LOOKUP, FOLLOW, UIO_SYSSPACE, svr4_emul_path,
p);
if ((error = namei(&ndroot)) != 0) {
/* Cannot happen! */
free(buf, M_TEMP);
vrele(nd.ni_vp);
return error;
}
NDFREE(&ndroot, NDF_ONLY_PNBUF);
if ((error = VOP_GETATTR(nd.ni_vp, &vat, p->p_ucred, p)) != 0) {
goto done;
}
if ((error = VOP_GETATTR(ndroot.ni_vp, &vatroot, p->p_ucred, p))
!= 0) {
goto done;
}
if (vat.va_fsid == vatroot.va_fsid &&
vat.va_fileid == vatroot.va_fileid) {
error = ENOENT;
goto done;
}
}
if (sgp == NULL)
*pbuf = buf;
else {
sz = &ptr[len] - buf;
*pbuf = stackgap_alloc(sgp, sz + 1);
error = copyout(buf, *pbuf, sz);
free(buf, M_TEMP);
}
done:
vrele(nd.ni_vp);
if (!cflag)
vrele(ndroot.ni_vp);
return error;
}
static int
svr4_elf_modevent(module_t mod, int type, void *data)
{
int error;
error = 0;
switch(type) {
case MOD_LOAD:
if (elf_insert_brand_entry(&svr4_brand) < 0)
error = EINVAL;
if (error)
printf("cannot insert svr4 elf brand handler\n");
else if (bootverbose)
printf("svr4 ELF exec handler installed\n");
break;
case MOD_UNLOAD:
/* Only allow the emulator to be removed if it isn't in use. */
if (elf_brand_inuse(&svr4_brand) != 0) {
error = EBUSY;
} else if (elf_remove_brand_entry(&svr4_brand) < 0) {
error = EINVAL;
}
if (error)
printf("Could not deinstall ELF interpreter entry (error %d)\n",
error);
else if (bootverbose)
printf("svr4 ELF exec handler removed\n");
break;
default:
break;
}
return error;
}
static moduledata_t svr4_elf_mod = {
"svr4elf",
svr4_elf_modevent,
0
};
DECLARE_MODULE(svr4elf, svr4_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY);