48b05c3f82
openat, mkdirat, mknodat, fchownat, futimesat, fstatat, unlinkat,
renameat, linkat, symlinkat, readlinkat, fchmodat, faccessat.
Submitted by: rdivacky
Sponsored by: Google Summer of Code 2007
Tested by: pho
313 lines
8.1 KiB
C
313 lines
8.1 KiB
C
/*-
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* Copyright (c) 1998 Mark Newton
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christos Zoulas.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/* XXX we use functions that might not exist. */
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#include "opt_compat.h"
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#ifndef COMPAT_43
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#error "Unable to compile SVR4-emulator due to missing COMPAT_43 option!"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/sysent.h>
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#include <sys/imgact.h>
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#include <sys/imgact_elf.h>
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#include <sys/fcntl.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/namei.h>
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#include <sys/socket.h>
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#include <sys/syscallsubr.h>
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#include <sys/vnode.h>
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#include <vm/vm.h>
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#include <sys/exec.h>
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#include <sys/kernel.h>
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#include <machine/cpu.h>
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#include <netinet/in.h>
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#include <compat/svr4/svr4.h>
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#include <compat/svr4/svr4_types.h>
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#include <compat/svr4/svr4_syscall.h>
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#include <compat/svr4/svr4_signal.h>
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#include <compat/svr4/svr4_socket.h>
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#include <compat/svr4/svr4_sockio.h>
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#include <compat/svr4/svr4_errno.h>
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#include <compat/svr4/svr4_proto.h>
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#include <compat/svr4/svr4_siginfo.h>
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#include <compat/svr4/svr4_util.h>
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int bsd_to_svr4_errno[ELAST+1] = {
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0,
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SVR4_EPERM,
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SVR4_ENOENT,
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SVR4_ESRCH,
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SVR4_EINTR,
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SVR4_EIO,
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SVR4_ENXIO,
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SVR4_E2BIG,
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SVR4_ENOEXEC,
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SVR4_EBADF,
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SVR4_ECHILD,
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SVR4_EDEADLK,
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SVR4_ENOMEM,
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SVR4_EACCES,
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SVR4_EFAULT,
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SVR4_ENOTBLK,
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SVR4_EBUSY,
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SVR4_EEXIST,
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SVR4_EXDEV,
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SVR4_ENODEV,
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SVR4_ENOTDIR,
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SVR4_EISDIR,
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SVR4_EINVAL,
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SVR4_ENFILE,
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SVR4_EMFILE,
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SVR4_ENOTTY,
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SVR4_ETXTBSY,
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SVR4_EFBIG,
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SVR4_ENOSPC,
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SVR4_ESPIPE,
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SVR4_EROFS,
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SVR4_EMLINK,
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SVR4_EPIPE,
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SVR4_EDOM,
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SVR4_ERANGE,
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SVR4_EAGAIN,
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SVR4_EINPROGRESS,
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SVR4_EALREADY,
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SVR4_ENOTSOCK,
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SVR4_EDESTADDRREQ,
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SVR4_EMSGSIZE,
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SVR4_EPROTOTYPE,
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SVR4_ENOPROTOOPT,
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SVR4_EPROTONOSUPPORT,
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SVR4_ESOCKTNOSUPPORT,
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SVR4_EOPNOTSUPP,
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SVR4_EPFNOSUPPORT,
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SVR4_EAFNOSUPPORT,
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SVR4_EADDRINUSE,
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SVR4_EADDRNOTAVAIL,
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SVR4_ENETDOWN,
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SVR4_ENETUNREACH,
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SVR4_ENETRESET,
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SVR4_ECONNABORTED,
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SVR4_ECONNRESET,
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SVR4_ENOBUFS,
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SVR4_EISCONN,
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SVR4_ENOTCONN,
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SVR4_ESHUTDOWN,
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SVR4_ETOOMANYREFS,
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SVR4_ETIMEDOUT,
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SVR4_ECONNREFUSED,
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SVR4_ELOOP,
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SVR4_ENAMETOOLONG,
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SVR4_EHOSTDOWN,
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SVR4_EHOSTUNREACH,
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SVR4_ENOTEMPTY,
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SVR4_EPROCLIM,
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SVR4_EUSERS,
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SVR4_EDQUOT,
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SVR4_ESTALE,
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SVR4_EREMOTE,
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SVR4_EBADRPC,
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SVR4_ERPCMISMATCH,
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SVR4_EPROGUNAVAIL,
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SVR4_EPROGMISMATCH,
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SVR4_EPROCUNAVAIL,
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SVR4_ENOLCK,
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SVR4_ENOSYS,
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SVR4_EFTYPE,
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SVR4_EAUTH,
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SVR4_ENEEDAUTH,
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SVR4_EIDRM,
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SVR4_ENOMSG,
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};
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static int svr4_fixup(register_t **stack_base, struct image_params *imgp);
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extern struct sysent svr4_sysent[];
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#undef szsigcode
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#undef sigcode
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extern int svr4_szsigcode;
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extern char svr4_sigcode[];
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struct sysentvec svr4_sysvec = {
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SVR4_SYS_MAXSYSCALL,
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svr4_sysent,
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0xff,
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SVR4_NSIG-1, /* NB: signal trans table indexed with signno-1 */
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bsd_to_svr4_sig+1,
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ELAST, /* ELAST */
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bsd_to_svr4_errno,
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NULL,
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svr4_fixup,
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svr4_sendsig,
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svr4_sigcode,
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&svr4_szsigcode,
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NULL,
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"SVR4",
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elf32_coredump,
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NULL,
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SVR4_MINSIGSTKSZ,
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PAGE_SIZE,
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VM_MIN_ADDRESS,
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VM_MAXUSER_ADDRESS,
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USRSTACK,
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PS_STRINGS,
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VM_PROT_ALL,
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exec_copyout_strings,
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exec_setregs,
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NULL
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};
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const char svr4_emul_path[] = "/compat/svr4";
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Elf32_Brandinfo svr4_brand = {
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ELFOSABI_SYSV,
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EM_386, /* XXX only implemented for x86 so far. */
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"SVR4",
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svr4_emul_path,
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"/lib/libc.so.1",
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&svr4_sysvec,
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NULL,
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};
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static int
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svr4_fixup(register_t **stack_base, struct image_params *imgp)
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{
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Elf32_Auxargs *args;
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register_t *pos;
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KASSERT(curthread->td_proc == imgp->proc,
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("unsafe svr4_fixup(), should be curproc"));
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args = (Elf32_Auxargs *)imgp->auxargs;
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pos = *stack_base + (imgp->args->argc + imgp->args->envc + 2);
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if (args->trace)
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AUXARGS_ENTRY(pos, AT_DEBUG, 1);
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if (args->execfd != -1)
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AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd);
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AUXARGS_ENTRY(pos, AT_PHDR, args->phdr);
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AUXARGS_ENTRY(pos, AT_PHENT, args->phent);
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AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum);
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AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz);
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AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
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AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
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AUXARGS_ENTRY(pos, AT_BASE, args->base);
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AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_ucred->cr_ruid);
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AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid);
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AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid);
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AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid);
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AUXARGS_ENTRY(pos, AT_NULL, 0);
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free(imgp->auxargs, M_TEMP);
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imgp->auxargs = NULL;
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(*stack_base)--;
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**stack_base = (register_t)imgp->args->argc;
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return 0;
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}
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/*
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* Search an alternate path before passing pathname arguments on
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* to system calls. Useful for keeping a separate 'emulation tree'.
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*
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* If cflag is set, we check if an attempt can be made to create
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* the named file, i.e. we check if the directory it should
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* be in exists.
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*/
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int
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svr4_emul_find(struct thread *td, char *path, enum uio_seg pathseg,
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char **pbuf, int create)
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{
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return (kern_alternate_path(td, svr4_emul_path, path, pathseg, pbuf,
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create, AT_FDCWD));
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}
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static int
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svr4_elf_modevent(module_t mod, int type, void *data)
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{
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int error;
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error = 0;
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switch(type) {
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case MOD_LOAD:
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if (elf32_insert_brand_entry(&svr4_brand) < 0) {
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printf("cannot insert svr4 elf brand handler\n");
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error = EINVAL;
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break;
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}
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if (bootverbose)
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printf("svr4 ELF exec handler installed\n");
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svr4_sockcache_init();
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break;
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case MOD_UNLOAD:
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/* Only allow the emulator to be removed if it isn't in use. */
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if (elf32_brand_inuse(&svr4_brand) != 0) {
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error = EBUSY;
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} else if (elf32_remove_brand_entry(&svr4_brand) < 0) {
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error = EINVAL;
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}
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if (error) {
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printf("Could not deinstall ELF interpreter entry (error %d)\n",
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error);
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break;
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}
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if (bootverbose)
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printf("svr4 ELF exec handler removed\n");
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svr4_sockcache_destroy();
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break;
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default:
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return (EOPNOTSUPP);
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break;
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}
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return error;
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}
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static moduledata_t svr4_elf_mod = {
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"svr4elf",
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svr4_elf_modevent,
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0
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};
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DECLARE_MODULE(svr4elf, svr4_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY);
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MODULE_DEPEND(svr4elf, streams, 1, 1, 1);
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