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 SYSCTL_NODE(_compat, OID_AUTO, ia32, CTLFLAG_RW, 0, "ia32 mode");
101 static u_long ia32_maxdsiz = IA32_MAXDSIZ;
102 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxdsiz, CTLFLAG_RW, &ia32_maxdsiz, 0, "");
103 TUNABLE_ULONG("compat.ia32.maxdsiz", &ia32_maxdsiz);
104 static u_long ia32_maxssiz = IA32_MAXSSIZ;
105 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxssiz, CTLFLAG_RW, &ia32_maxssiz, 0, "");
106 TUNABLE_ULONG("compat.ia32.maxssiz", &ia32_maxssiz);
107 static u_long ia32_maxvmem = IA32_MAXVMEM;
108 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxvmem, CTLFLAG_RW, &ia32_maxvmem, 0, "");
109 TUNABLE_ULONG("compat.ia32.maxvmem", &ia32_maxvmem);
111 struct sysentvec ia32_freebsd_sysvec = {
112 .sv_size = FREEBSD32_SYS_MAXSYSCALL,
113 .sv_table = freebsd32_sysent,
119 .sv_transtrap = NULL,
120 .sv_fixup = elf32_freebsd_fixup,
121 .sv_sendsig = ia32_sendsig,
122 .sv_sigcode = ia32_sigcode,
123 .sv_szsigcode = &sz_ia32_sigcode,
124 .sv_prepsyscall = NULL,
125 .sv_name = "FreeBSD ELF32",
126 .sv_coredump = elf32_coredump,
127 .sv_imgact_try = NULL,
128 .sv_minsigstksz = MINSIGSTKSZ,
129 .sv_pagesize = IA32_PAGE_SIZE,
131 .sv_maxuser = FREEBSD32_USRSTACK,
132 .sv_usrstack = FREEBSD32_USRSTACK,
133 .sv_psstrings = FREEBSD32_PS_STRINGS,
134 .sv_stackprot = VM_PROT_ALL,
135 .sv_copyout_strings = ia32_copyout_strings,
136 .sv_setregs = ia32_setregs,
137 .sv_fixlimit = ia32_fixlimit,
138 .sv_maxssiz = &ia32_maxssiz,
139 .sv_flags = SV_ABI_FREEBSD | SV_IA32 | SV_ILP32
143 static Elf32_Brandinfo ia32_brand_info = {
144 .brand = ELFOSABI_FREEBSD,
146 .compat_3_brand = "FreeBSD",
148 .interp_path = "/libexec/ld-elf.so.1",
149 .sysvec = &ia32_freebsd_sysvec,
150 .interp_newpath = "/libexec/ld-elf32.so.1",
151 .brand_note = &elf32_freebsd_brandnote,
152 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
155 SYSINIT(ia32, SI_SUB_EXEC, SI_ORDER_ANY,
156 (sysinit_cfunc_t) elf32_insert_brand_entry,
159 static Elf32_Brandinfo ia32_brand_oinfo = {
160 .brand = ELFOSABI_FREEBSD,
162 .compat_3_brand = "FreeBSD",
164 .interp_path = "/usr/libexec/ld-elf.so.1",
165 .sysvec = &ia32_freebsd_sysvec,
166 .interp_newpath = "/libexec/ld-elf32.so.1",
167 .brand_note = &elf32_freebsd_brandnote,
168 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
171 SYSINIT(oia32, SI_SUB_EXEC, SI_ORDER_ANY,
172 (sysinit_cfunc_t) elf32_insert_brand_entry,
177 elf32_dump_thread(struct thread *td __unused, void *dst __unused,
178 size_t *off __unused)
183 /* XXX may be freebsd32 MI */
185 ia32_copyout_strings(struct image_params *imgp)
189 char *stringp, *destp;
190 u_int32_t *stack_base;
191 struct freebsd32_ps_strings *arginfo;
196 * Calculate string base and vector table pointers.
197 * Also deal with signal trampoline code for this exec type.
199 if (imgp->execpath != NULL && imgp->auxargs != NULL)
200 execpath_len = strlen(imgp->execpath) + 1;
203 arginfo = (struct freebsd32_ps_strings *)FREEBSD32_PS_STRINGS;
204 szsigcode = *(imgp->proc->p_sysent->sv_szsigcode);
205 destp = (caddr_t)arginfo - szsigcode - SPARE_USRSPACE -
206 roundup(execpath_len, sizeof(char *)) -
207 roundup((ARG_MAX - imgp->args->stringspace), sizeof(char *));
213 copyout(imgp->proc->p_sysent->sv_sigcode,
214 ((caddr_t)arginfo - szsigcode), szsigcode);
217 * Copy the image path for the rtld.
219 if (execpath_len != 0) {
220 imgp->execpathp = (uintptr_t)arginfo - szsigcode - execpath_len;
221 copyout(imgp->execpath, (void *)imgp->execpathp,
226 * If we have a valid auxargs ptr, prepare some room
231 * 'AT_COUNT*2' is size for the ELF Auxargs data. This is for
232 * lower compatibility.
234 imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size
237 * The '+ 2' is for the null pointers at the end of each of
238 * the arg and env vector sets,and imgp->auxarg_size is room
239 * for argument of Runtime loader.
241 vectp = (u_int32_t *) (destp - (imgp->args->argc +
242 imgp->args->envc + 2 + imgp->auxarg_size + execpath_len) *
246 * The '+ 2' is for the null pointers at the end of each of
247 * the arg and env vector sets
249 vectp = (u_int32_t *)
250 (destp - (imgp->args->argc + imgp->args->envc + 2) * sizeof(u_int32_t));
253 * vectp also becomes our initial stack base
257 stringp = imgp->args->begin_argv;
258 argc = imgp->args->argc;
259 envc = imgp->args->envc;
261 * Copy out strings - arguments and environment.
263 copyout(stringp, destp, ARG_MAX - imgp->args->stringspace);
266 * Fill in "ps_strings" struct for ps, w, etc.
268 suword32(&arginfo->ps_argvstr, (u_int32_t)(intptr_t)vectp);
269 suword32(&arginfo->ps_nargvstr, argc);
272 * Fill in argument portion of vector table.
274 for (; argc > 0; --argc) {
275 suword32(vectp++, (u_int32_t)(intptr_t)destp);
276 while (*stringp++ != 0)
281 /* a null vector table pointer separates the argp's from the envp's */
282 suword32(vectp++, 0);
284 suword32(&arginfo->ps_envstr, (u_int32_t)(intptr_t)vectp);
285 suword32(&arginfo->ps_nenvstr, envc);
288 * Fill in environment portion of vector table.
290 for (; envc > 0; --envc) {
291 suword32(vectp++, (u_int32_t)(intptr_t)destp);
292 while (*stringp++ != 0)
297 /* end of vector table is a null pointer */
300 return ((register_t *)stack_base);
304 ia32_fixlimit(struct rlimit *rl, int which)
309 if (ia32_maxdsiz != 0) {
310 if (rl->rlim_cur > ia32_maxdsiz)
311 rl->rlim_cur = ia32_maxdsiz;
312 if (rl->rlim_max > ia32_maxdsiz)
313 rl->rlim_max = ia32_maxdsiz;
317 if (ia32_maxssiz != 0) {
318 if (rl->rlim_cur > ia32_maxssiz)
319 rl->rlim_cur = ia32_maxssiz;
320 if (rl->rlim_max > ia32_maxssiz)
321 rl->rlim_max = ia32_maxssiz;
325 if (ia32_maxvmem != 0) {
326 if (rl->rlim_cur > ia32_maxvmem)
327 rl->rlim_cur = ia32_maxvmem;
328 if (rl->rlim_max > ia32_maxvmem)
329 rl->rlim_max = ia32_maxvmem;