2 * Copyright (c) 2002 Doug Rabson
3 * Copyright (c) 2003 Peter Wemm
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 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include "opt_compat.h"
33 #define __ELF_WORD_SIZE 32
35 #include <sys/param.h>
37 #include <sys/fcntl.h>
38 #include <sys/imgact.h>
39 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <sys/mutex.h>
44 #include <sys/namei.h>
45 #include <sys/pioctl.h>
47 #include <sys/procfs.h>
48 #include <sys/resourcevar.h>
49 #include <sys/systm.h>
50 #include <sys/signalvar.h>
53 #include <sys/syscall.h>
54 #include <sys/sysctl.h>
55 #include <sys/sysent.h>
56 #include <sys/vnode.h>
57 #include <sys/imgact_elf.h>
60 #include <vm/vm_kern.h>
61 #include <vm/vm_param.h>
63 #include <vm/vm_map.h>
64 #include <vm/vm_object.h>
65 #include <vm/vm_extern.h>
67 #include <compat/freebsd32/freebsd32_signal.h>
68 #include <compat/freebsd32/freebsd32_util.h>
69 #include <compat/freebsd32/freebsd32_proto.h>
70 #include <compat/freebsd32/freebsd32_syscall.h>
71 #include <compat/ia32/ia32_signal.h>
73 #include <machine/psl.h>
74 #include <machine/segments.h>
75 #include <machine/specialreg.h>
77 #include <i386/include/psl.h>
78 #include <i386/include/segments.h>
79 #include <i386/include/specialreg.h>
81 #include <machine/frame.h>
82 #include <machine/md_var.h>
83 #include <machine/pcb.h>
84 #include <machine/cpufunc.h>
86 CTASSERT(sizeof(struct ia32_mcontext) == 640);
87 CTASSERT(sizeof(struct ia32_ucontext) == 704);
88 CTASSERT(sizeof(struct ia32_sigframe) == 800);
89 CTASSERT(sizeof(struct siginfo32) == 64);
90 #ifdef COMPAT_FREEBSD4
91 CTASSERT(sizeof(struct ia32_mcontext4) == 260);
92 CTASSERT(sizeof(struct ia32_ucontext4) == 324);
93 CTASSERT(sizeof(struct ia32_sigframe4) == 408);
96 static register_t *ia32_copyout_strings(struct image_params *imgp);
97 static void ia32_fixlimit(struct rlimit *rl, int which);
99 extern struct sysent freebsd32_sysent[];
101 SYSCTL_NODE(_compat, OID_AUTO, ia32, CTLFLAG_RW, 0, "ia32 mode");
103 struct sysentvec ia32_freebsd_sysvec = {
104 FREEBSD32_SYS_MAXSYSCALL,
125 FREEBSD32_PS_STRINGS,
127 ia32_copyout_strings,
133 static Elf32_Brandinfo ia32_brand_info = {
138 "/libexec/ld-elf.so.1",
139 &ia32_freebsd_sysvec,
140 "/libexec/ld-elf32.so.1",
144 SYSINIT(ia32, SI_SUB_EXEC, SI_ORDER_ANY,
145 (sysinit_cfunc_t) elf32_insert_brand_entry,
148 static Elf32_Brandinfo ia32_brand_oinfo = {
153 "/usr/libexec/ld-elf.so.1",
154 &ia32_freebsd_sysvec,
155 "/libexec/ld-elf32.so.1",
159 SYSINIT(oia32, SI_SUB_EXEC, SI_ORDER_ANY,
160 (sysinit_cfunc_t) elf32_insert_brand_entry,
165 elf32_dump_thread(struct thread *td __unused, void *dst __unused,
166 size_t *off __unused)
171 /* XXX may be freebsd32 MI */
173 ia32_copyout_strings(struct image_params *imgp)
177 char *stringp, *destp;
178 u_int32_t *stack_base;
179 struct freebsd32_ps_strings *arginfo;
183 * Calculate string base and vector table pointers.
184 * Also deal with signal trampoline code for this exec type.
186 arginfo = (struct freebsd32_ps_strings *)FREEBSD32_PS_STRINGS;
187 szsigcode = *(imgp->proc->p_sysent->sv_szsigcode);
188 destp = (caddr_t)arginfo - szsigcode - SPARE_USRSPACE -
189 roundup((ARG_MAX - imgp->args->stringspace), sizeof(char *));
195 copyout(imgp->proc->p_sysent->sv_sigcode,
196 ((caddr_t)arginfo - szsigcode), szsigcode);
199 * If we have a valid auxargs ptr, prepare some room
204 * 'AT_COUNT*2' is size for the ELF Auxargs data. This is for
205 * lower compatibility.
207 imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size
210 * The '+ 2' is for the null pointers at the end of each of
211 * the arg and env vector sets,and imgp->auxarg_size is room
212 * for argument of Runtime loader.
214 vectp = (u_int32_t *) (destp - (imgp->args->argc + imgp->args->envc + 2 +
215 imgp->auxarg_size) * sizeof(u_int32_t));
219 * The '+ 2' is for the null pointers at the end of each of
220 * the arg and env vector sets
222 vectp = (u_int32_t *)
223 (destp - (imgp->args->argc + imgp->args->envc + 2) * sizeof(u_int32_t));
226 * vectp also becomes our initial stack base
230 stringp = imgp->args->begin_argv;
231 argc = imgp->args->argc;
232 envc = imgp->args->envc;
234 * Copy out strings - arguments and environment.
236 copyout(stringp, destp, ARG_MAX - imgp->args->stringspace);
239 * Fill in "ps_strings" struct for ps, w, etc.
241 suword32(&arginfo->ps_argvstr, (u_int32_t)(intptr_t)vectp);
242 suword32(&arginfo->ps_nargvstr, argc);
245 * Fill in argument portion of vector table.
247 for (; argc > 0; --argc) {
248 suword32(vectp++, (u_int32_t)(intptr_t)destp);
249 while (*stringp++ != 0)
254 /* a null vector table pointer separates the argp's from the envp's */
255 suword32(vectp++, 0);
257 suword32(&arginfo->ps_envstr, (u_int32_t)(intptr_t)vectp);
258 suword32(&arginfo->ps_nenvstr, envc);
261 * Fill in environment portion of vector table.
263 for (; envc > 0; --envc) {
264 suword32(vectp++, (u_int32_t)(intptr_t)destp);
265 while (*stringp++ != 0)
270 /* end of vector table is a null pointer */
273 return ((register_t *)stack_base);
276 static u_long ia32_maxdsiz = IA32_MAXDSIZ;
277 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxdsiz, CTLFLAG_RW, &ia32_maxdsiz, 0, "");
278 static u_long ia32_maxssiz = IA32_MAXSSIZ;
279 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxssiz, CTLFLAG_RW, &ia32_maxssiz, 0, "");
280 static u_long ia32_maxvmem = IA32_MAXVMEM;
281 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxvmem, CTLFLAG_RW, &ia32_maxvmem, 0, "");
284 ia32_fixlimit(struct rlimit *rl, int which)
289 if (ia32_maxdsiz != 0) {
290 if (rl->rlim_cur > ia32_maxdsiz)
291 rl->rlim_cur = ia32_maxdsiz;
292 if (rl->rlim_max > ia32_maxdsiz)
293 rl->rlim_max = ia32_maxdsiz;
297 if (ia32_maxssiz != 0) {
298 if (rl->rlim_cur > ia32_maxssiz)
299 rl->rlim_cur = ia32_maxssiz;
300 if (rl->rlim_max > ia32_maxssiz)
301 rl->rlim_max = ia32_maxssiz;
305 if (ia32_maxvmem != 0) {
306 if (rl->rlim_cur > ia32_maxvmem)
307 rl->rlim_cur = ia32_maxvmem;
308 if (rl->rlim_max > ia32_maxvmem)
309 rl->rlim_max = ia32_maxvmem;