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/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/compat/svr4/svr4_sysvec.c 219405 2011-03-08 19:01:45Z dchagin $");
/* XXX we use functions that might not exist. */
#include "opt_compat.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/sysent.h>
#include <sys/imgact.h>
#include <sys/imgact_elf.h>
#include <sys/fcntl.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/socket.h>
#include <sys/syscallsubr.h>
#include <sys/vnode.h>
#include <vm/vm.h>
#include <sys/exec.h>
#include <sys/kernel.h>
#include <machine/cpu.h>
#include <netinet/in.h>
#include <compat/svr4/svr4.h>
#include <compat/svr4/svr4_types.h>
#include <compat/svr4/svr4_syscall.h>
#include <compat/svr4/svr4_signal.h>
#include <compat/svr4/svr4_socket.h>
#include <compat/svr4/svr4_sockio.h>
#include <compat/svr4/svr4_errno.h>
#include <compat/svr4/svr4_proto.h>
#include <compat/svr4/svr4_siginfo.h>
#include <compat/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(register_t **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 = {
.sv_size = SVR4_SYS_MAXSYSCALL,
.sv_table = svr4_sysent,
.sv_mask = 0xff,
.sv_sigsize = SVR4_NSIG-1, /* NB: signal trans table indexed with signno-1 */
.sv_sigtbl = bsd_to_svr4_sig+1,
.sv_errsize = ELAST, /* ELAST */
.sv_errtbl = bsd_to_svr4_errno,
.sv_transtrap = NULL,
.sv_fixup = svr4_fixup,
.sv_sendsig = svr4_sendsig,
.sv_sigcode = svr4_sigcode,
.sv_szsigcode = &svr4_szsigcode,
.sv_prepsyscall = NULL,
.sv_name = "SVR4",
.sv_coredump = elf32_coredump,
.sv_imgact_try = NULL,
.sv_minsigstksz = SVR4_MINSIGSTKSZ,
.sv_pagesize = PAGE_SIZE,
.sv_minuser = VM_MIN_ADDRESS,
.sv_maxuser = VM_MAXUSER_ADDRESS,
.sv_usrstack = USRSTACK,
.sv_psstrings = PS_STRINGS,
.sv_stackprot = VM_PROT_ALL,
.sv_copyout_strings = exec_copyout_strings,
.sv_setregs = exec_setregs,
.sv_fixlimit = NULL,
.sv_maxssiz = NULL,
.sv_flags = SV_ABI_UNDEF | SV_IA32 | SV_ILP32,
.sv_set_syscall_retval = cpu_set_syscall_retval,
.sv_fetch_syscall_args = cpu_fetch_syscall_args,
.sv_syscallnames = NULL,
.sv_schedtail = NULL,
};
const char svr4_emul_path[] = "/compat/svr4";
Elf32_Brandinfo svr4_brand = {
.brand = ELFOSABI_SYSV,
.machine = EM_386, /* XXX only implemented for x86 so far. */
.compat_3_brand = "SVR4",
.emul_path = svr4_emul_path,
.interp_path = "/lib/libc.so.1",
.sysvec = &svr4_sysvec,
.interp_newpath = NULL,
.brand_note = NULL,
.flags = 0
};
static int
svr4_fixup(register_t **stack_base, struct image_params *imgp)
{
Elf32_Auxargs *args;
register_t *pos;
KASSERT(curthread->td_proc == imgp->proc,
("unsafe svr4_fixup(), should be curproc"));
args = (Elf32_Auxargs *)imgp->auxargs;
pos = *stack_base + (imgp->args->argc + imgp->args->envc + 2);
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_ucred->cr_ruid);
AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid);
AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid);
AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid);
AUXARGS_ENTRY(pos, AT_NULL, 0);
free(imgp->auxargs, M_TEMP);
imgp->auxargs = NULL;
(*stack_base)--;
**stack_base = (register_t)imgp->args->argc;
return 0;
}
/*
* Search an alternate path before passing pathname arguments on
* to system calls. Useful for keeping a separate '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.
*/
int
svr4_emul_find(struct thread *td, char *path, enum uio_seg pathseg,
char **pbuf, int create)
{
return (kern_alternate_path(td, svr4_emul_path, path, pathseg, pbuf,
create, AT_FDCWD));
}
static int
svr4_elf_modevent(module_t mod, int type, void *data)
{
int error;
error = 0;
switch(type) {
case MOD_LOAD:
if (elf32_insert_brand_entry(&svr4_brand) < 0) {
printf("cannot insert svr4 elf brand handler\n");
error = EINVAL;
break;
}
if (bootverbose)
printf("svr4 ELF exec handler installed\n");
svr4_sockcache_init();
break;
case MOD_UNLOAD:
/* Only allow the emulator to be removed if it isn't in use. */
if (elf32_brand_inuse(&svr4_brand) != 0) {
error = EBUSY;
} else if (elf32_remove_brand_entry(&svr4_brand) < 0) {
error = EINVAL;
}
if (error) {
printf("Could not deinstall ELF interpreter entry (error %d)\n",
error);
break;
}
if (bootverbose)
printf("svr4 ELF exec handler removed\n");
svr4_sockcache_destroy();
break;
default:
return (EOPNOTSUPP);
break;
}
return error;
}
static moduledata_t svr4_elf_mod = {
"svr4elf",
svr4_elf_modevent,
0
};
DECLARE_MODULE_TIED(svr4elf, svr4_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY);
MODULE_DEPEND(svr4elf, streams, 1, 1, 1);