2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2019 Justin Hibbits
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer
11 * in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 __elfN(powerpc_copyout_auxargs)(struct image_params *imgp, uintptr_t base)
36 Elf_Auxinfo *argarray, *pos;
37 struct vmspace *vmspace;
41 * XXX If we can't find image's OSREL, assume it uses the new auxv
44 * This is specially important for rtld, that is not tagged. Using
45 * direct exec mode with new (ELFv2) binaries that expect the new auxv
46 * format would result in crashes otherwise.
48 * Unfortunately, this may break direct exec'ing old binaries,
49 * but it seems better to correctly support new binaries by default,
50 * considering the transition to ELFv2 happened quite some time
51 * ago. If needed, a sysctl may be added to allow old auxv format to
52 * be used when OSREL is not found.
54 if (imgp->proc->p_osrel >= P_OSREL_POWERPC_NEW_AUX_ARGS ||
55 imgp->proc->p_osrel == 0)
56 return (__elfN(freebsd_copyout_auxargs)(imgp, base));
58 args = (Elf_Auxargs *)imgp->auxargs;
59 argarray = pos = malloc(AT_OLD_COUNT * sizeof(*pos), M_TEMP,
62 vmspace = imgp->proc->p_vmspace;
64 if (args->execfd != -1)
65 AUXARGS_ENTRY(pos, AT_OLD_EXECFD, args->execfd);
66 AUXARGS_ENTRY(pos, AT_OLD_PHDR, args->phdr);
67 AUXARGS_ENTRY(pos, AT_OLD_PHENT, args->phent);
68 AUXARGS_ENTRY(pos, AT_OLD_PHNUM, args->phnum);
69 AUXARGS_ENTRY(pos, AT_OLD_PAGESZ, args->pagesz);
70 AUXARGS_ENTRY(pos, AT_OLD_FLAGS, args->flags);
71 AUXARGS_ENTRY(pos, AT_OLD_ENTRY, args->entry);
72 AUXARGS_ENTRY(pos, AT_OLD_BASE, args->base);
73 AUXARGS_ENTRY(pos, AT_OLD_EHDRFLAGS, args->hdr_eflags);
74 if (imgp->execpathp != 0)
75 AUXARGS_ENTRY_PTR(pos, AT_OLD_EXECPATH, imgp->execpathp);
76 AUXARGS_ENTRY(pos, AT_OLD_OSRELDATE,
77 imgp->proc->p_ucred->cr_prison->pr_osreldate);
78 if (imgp->canary != 0) {
79 AUXARGS_ENTRY_PTR(pos, AT_OLD_CANARY, imgp->canary);
80 AUXARGS_ENTRY(pos, AT_OLD_CANARYLEN, imgp->canarylen);
82 AUXARGS_ENTRY(pos, AT_OLD_NCPUS, mp_ncpus);
83 if (imgp->pagesizes != 0) {
84 AUXARGS_ENTRY_PTR(pos, AT_OLD_PAGESIZES, imgp->pagesizes);
85 AUXARGS_ENTRY(pos, AT_OLD_PAGESIZESLEN, imgp->pagesizeslen);
87 if ((imgp->sysent->sv_flags & SV_TIMEKEEP) != 0) {
88 AUXARGS_ENTRY(pos, AT_OLD_TIMEKEEP,
89 vmspace->vm_shp_base + imgp->sysent->sv_timekeep_offset);
91 AUXARGS_ENTRY(pos, AT_OLD_STACKPROT, imgp->sysent->sv_shared_page_obj
92 != NULL && imgp->stack_prot != 0 ? imgp->stack_prot :
93 imgp->sysent->sv_stackprot);
94 if (imgp->sysent->sv_hwcap != NULL)
95 AUXARGS_ENTRY(pos, AT_OLD_HWCAP, *imgp->sysent->sv_hwcap);
96 if (imgp->sysent->sv_hwcap2 != NULL)
97 AUXARGS_ENTRY(pos, AT_OLD_HWCAP2, *imgp->sysent->sv_hwcap2);
98 AUXARGS_ENTRY(pos, AT_OLD_NULL, 0);
100 free(imgp->auxargs, M_TEMP);
101 imgp->auxargs = NULL;
102 KASSERT(pos - argarray <= AT_OLD_COUNT, ("Too many auxargs"));
104 error = copyout(argarray, (void *)base, sizeof(*argarray) * AT_OLD_COUNT);
105 free(argarray, M_TEMP);