int
ELFNAME2(linux32,probe)(struct lwp *l, struct exec_package *epp,
void *eh, char *itp, vaddr_t *pos)
{
int error;
if (((error = ELFNAME2(linux,signature)(l, epp, eh, itp)) != 0) &&
#ifdef LINUX32_GCC_SIGNATURE
((error = ELFNAME2(linux,gcc_signature)(l, epp, eh)) != 0) &&
#endif
#ifdef LINUX32_ATEXIT_SIGNATURE
((error = ELFNAME2(linux,atexit_signature)(l, epp, eh)) != 0) &&
#endif
#ifdef LINUX32_DEBUGLINK_SIGNATURE
((error = ELFNAME2(linux,debuglink_signature)(l, epp, eh)) != 0) &&
#endif
1)
return error;
if (itp) {
if ((error = emul_find_interp(l, epp, itp)))
return (error);
}
#if 0
DPRINTF(("linux32_probe: returning 0\n"));
#endif
epp->ep_flags |= EXEC_32 | EXEC_FORCEAUX;
epp->ep_vm_minaddr = VM_MIN_ADDRESS;
epp->ep_vm_maxaddr = USRSTACK32;
return 0;
}
int
ELFNAME2(linux,probe)(struct lwp *l, struct exec_package *epp, void *eh,
char *itp, vaddr_t *pos)
{
int error;
if (((error = ELFNAME2(linux,signature)(l, epp, eh, itp)) != 0) &&
#ifdef LINUX_GCC_SIGNATURE
((error = ELFNAME2(linux,gcc_signature)(l, epp, eh)) != 0) &&
#endif
#ifdef LINUX_ATEXIT_SIGNATURE
((error = ELFNAME2(linux,atexit_signature)(l, epp, eh)) != 0) &&
#endif
#ifdef LINUX_DEBUGLINK_SIGNATURE
((error = ELFNAME2(linux,debuglink_signature)(l, epp, eh)) != 0) &&
#endif
1) {
DPRINTF(("linux_probe: returning %d\n", error));
return error;
}
if (itp) {
if ((error = emul_find_interp(l, epp, itp)))
return (error);
}
epp->ep_flags |= EXEC_FORCEAUX;
DPRINTF(("linux_probe: returning 0\n"));
return 0;
}
int
svr4_elf64_probe(struct lwp *l, struct exec_package *epp, void *eh, char *itp, vaddr_t *pos)
{
int error;
if (itp) {
if ((error = emul_find_interp(l, epp, itp)))
return error;
}
#ifdef SVR4_INTERP_ADDR
*pos = SVR4_INTERP_ADDR;
#endif
return 0;
}
int
svr4_elf32_probe(
struct lwp *l,
struct exec_package *epp,
void *eh,
char *itp,
vaddr_t *pos
)
{
struct proc *p = l->l_proc;
int error;
if (itp) {
if ((error = emul_find_interp(LIST_FIRST(&p->p_lwps), epp, itp)))
return error;
}
#ifdef SVR4_INTERP_ADDR
*pos = SVR4_INTERP_ADDR;
#endif
return 0;
}
static int
osf1_exec_ecoff_dynamic(struct lwp *l, struct exec_package *epp)
{
struct osf1_exec_emul_arg *emul_arg = epp->ep_emul_arg;
struct ecoff_exechdr ldr_exechdr;
struct vnode *ldr_vp;
size_t resid;
int error;
strncpy(emul_arg->loader_name, OSF1_LDR_EXEC_DEFAULT_LOADER,
MAXPATHLEN + 1);
/*
* locate the loader
* includes /emul/osf1 if appropriate
*/
error = emul_find_interp(LIST_FIRST(&l->l_proc->p_lwps),
epp, emul_arg->loader_name);
if (error)
return error;
emul_arg->flags |= OSF1_EXEC_EMUL_FLAGS_HAVE_LOADER;
#if 0
uprintf("loader is %s\n", emul_arg->loader_name);
#endif
/*
* open the loader, see if it's an ECOFF executable,
* make sure the object type is amenable, then arrange to
* load it up.
*/
ldr_vp = epp->ep_interp;
epp->ep_interp = NULL;
vn_lock(ldr_vp, LK_EXCLUSIVE | LK_RETRY);
/*
* Basic access checks. Reject if:
* not a regular file
* exec not allowed on binary
* exec not allowed on mount point
*/
if (ldr_vp->v_type != VREG) {
error = EACCES;
goto badunlock;
}
if ((error = VOP_ACCESS(ldr_vp, VEXEC, l->l_cred)) != 0)
goto badunlock;
if (ldr_vp->v_mount->mnt_flag & MNT_NOEXEC) {
error = EACCES;
goto badunlock;
}
/*
* If loader's mount point disallows set-id execution,
* disable set-id.
*/
if (ldr_vp->v_mount->mnt_flag & MNT_NOSUID)
epp->ep_vap->va_mode &= ~(S_ISUID | S_ISGID);
VOP_UNLOCK(ldr_vp);
/*
* read the header, and make sure we got all of it.
*/
if ((error = vn_rdwr(UIO_READ, ldr_vp, (void *)&ldr_exechdr,
sizeof ldr_exechdr, 0, UIO_SYSSPACE, 0, l->l_cred,
&resid, NULL)) != 0)
goto bad;
if (resid != 0) {
error = ENOEXEC;
goto bad;
}
/*
* Check the magic. We expect it to be the native Alpha ECOFF
* (Digital UNIX) magic number. Also make sure it's not a shared
* lib or dynamically linked executable.
*/
if (ldr_exechdr.f.f_magic != ECOFF_MAGIC_ALPHA) {
error = ENOEXEC;
goto bad;
}
switch (ldr_exechdr.f.f_flags & ECOFF_FLAG_OBJECT_TYPE_MASK) {
case ECOFF_OBJECT_TYPE_SHARABLE:
case ECOFF_OBJECT_TYPE_CALL_SHARED:
/* can't exec shared lib or dynamically linked executable. */
error = ENOEXEC;
goto bad;
}
switch (ldr_exechdr.a.magic) {
case ECOFF_OMAGIC:
error = exec_ecoff_prep_omagic(l, epp, &ldr_exechdr, ldr_vp);
break;
case ECOFF_NMAGIC:
error = exec_ecoff_prep_nmagic(l, epp, &ldr_exechdr, ldr_vp);
break;
case ECOFF_ZMAGIC:
error = exec_ecoff_prep_zmagic(l, epp, &ldr_exechdr, ldr_vp);
break;
default:
error = ENOEXEC;
}
if (error)
goto bad;
/* finally, set up the stack. */
error = (*epp->ep_esch->es_setup_stack)(l, epp);
if (error)
goto bad;
vrele(ldr_vp);
return (0);
badunlock:
VOP_UNLOCK(ldr_vp);
bad:
vrele(ldr_vp);
return (error);
}
/*
* load(mmap) file. for dynamic linker (ld.so.dll)
*/
int
pecoff_load_file(struct lwp *l, struct exec_package *epp, const char *path, struct exec_vmcmd_set *vcset, u_long *entry, struct pecoff_args *argp)
{
int error, peofs, scnsiz, i;
struct vnode *vp;
struct vattr attr;
struct pecoff_dos_filehdr dh;
struct coff_filehdr *fp = 0;
struct coff_aouthdr *ap;
struct pecoff_opthdr *wp;
struct coff_scnhdr *sh = 0;
error = emul_find_interp(l, epp, path);
if (error != 0)
return error;
vp = epp->ep_interp;
epp->ep_interp = NULL;
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
/*
* If it's not marked as executable, or it's not a regular
* file, we don't allow it to be used.
*/
if (vp->v_type != VREG) {
error = EACCES;
goto badunlock;
}
if ((error = VOP_ACCESS(vp, VEXEC, l->l_cred)) != 0)
goto badunlock;
/* get attributes */
if ((error = VOP_GETATTR(vp, &attr, l->l_cred)) != 0)
goto badunlock;
/*
* Check mount point. Though we're not trying to exec this binary,
* we will be executing code from it, so if the mount point
* disallows execution or set-id-ness, we punt or kill the set-id.
*/
if (vp->v_mount->mnt_flag & MNT_NOEXEC) {
error = EACCES;
goto badunlock;
}
if (vp->v_mount->mnt_flag & MNT_NOSUID)
epp->ep_vap->va_mode &= ~(S_ISUID | S_ISGID);
if ((error = vn_marktext(vp)))
goto badunlock;
VOP_UNLOCK(vp, 0);
/*
* Read header.
*/
error = exec_read_from(l, vp, 0, &dh, sizeof(dh));
if (error != 0)
goto bad;
if ((error = pecoff_signature(l, vp, &dh)) != 0)
goto bad;
fp = malloc(PECOFF_HDR_SIZE, M_TEMP, M_WAITOK);
peofs = dh.d_peofs + sizeof(signature) - 1;
error = exec_read_from(l, vp, peofs, fp, PECOFF_HDR_SIZE);
if (error != 0)
goto bad;
if (COFF_BADMAG(fp)) {
error = ENOEXEC;
goto bad;
}
ap = (void *)((char *)fp + sizeof(struct coff_filehdr));
wp = (void *)((char *)ap + sizeof(struct coff_aouthdr));
/* read section header */
scnsiz = sizeof(struct coff_scnhdr) * fp->f_nscns;
sh = malloc(scnsiz, M_TEMP, M_WAITOK);
if ((error = exec_read_from(l, vp, peofs + PECOFF_HDR_SIZE, sh,
scnsiz)) != 0)
goto bad;
/*
* Read section header, and mmap.
*/
for (i = 0; i < fp->f_nscns; i++) {
int prot = 0;
long addr;
u_long size;
if (sh[i].s_flags & COFF_STYP_DISCARD)
continue;
/* XXX ? */
if ((sh[i].s_flags & COFF_STYP_TEXT) &&
(sh[i].s_flags & COFF_STYP_EXEC) == 0)
continue;
if ((sh[i].s_flags & (COFF_STYP_TEXT|COFF_STYP_DATA|
COFF_STYP_BSS|COFF_STYP_READ)) == 0)
continue;
sh[i].s_vaddr += wp->w_base; /* RVA --> VA */
pecoff_load_section(vcset, vp, &sh[i], &addr, &size, &prot);
}
*entry = wp->w_base + ap->a_entry;
argp->a_ldbase = wp->w_base;
argp->a_ldexport = wp->w_imghdr[0].i_vaddr + wp->w_base;
free(fp, M_TEMP);
free(sh, M_TEMP);
/*XXXUNCONST*/
vrele(vp);
return 0;
badunlock:
VOP_UNLOCK(vp, 0);
bad:
if (fp != 0)
free(fp, M_TEMP);
if (sh != 0)
free(sh, M_TEMP);
/*XXXUNCONST*/
vrele(vp);
return error;
}
