1 /*-
2 * Copyright (c) 2002 Doug Rabson
3 * Copyright (c) 2003 Peter Wemm
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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.
14 *
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
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include "opt_compat.h"
32
33 #define __ELF_WORD_SIZE 32
34
35 #include <sys/param.h>
36 #include <sys/exec.h>
37 #include <sys/fcntl.h>
38 #include <sys/imgact.h>
39 #include <sys/kernel.h>
40 #include <sys/lock.h>
41 #include <sys/malloc.h>
42 #include <sys/mutex.h>
43 #include <sys/mman.h>
44 #include <sys/namei.h>
45 #include <sys/pioctl.h>
46 #include <sys/proc.h>
47 #include <sys/procfs.h>
48 #include <sys/resourcevar.h>
49 #include <sys/systm.h>
50 #include <sys/signalvar.h>
51 #include <sys/stat.h>
52 #include <sys/sx.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>
58
59 #include <vm/vm.h>
60 #include <vm/vm_kern.h>
61 #include <vm/vm_param.h>
62 #include <vm/pmap.h>
63 #include <vm/vm_map.h>
64 #include <vm/vm_object.h>
65 #include <vm/vm_extern.h>
66
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>
72 #include <machine/frame.h>
73 #include <machine/md_var.h>
74 #include <machine/pcb.h>
75 #include <machine/cpufunc.h>
76
77 CTASSERT(sizeof(struct ia32_mcontext) == 640);
78 CTASSERT(sizeof(struct ia32_ucontext) == 704);
79 CTASSERT(sizeof(struct ia32_sigframe) == 800);
80 CTASSERT(sizeof(struct siginfo32) == 64);
81 #ifdef COMPAT_FREEBSD4
82 CTASSERT(sizeof(struct ia32_mcontext4) == 260);
83 CTASSERT(sizeof(struct ia32_ucontext4) == 324);
84 CTASSERT(sizeof(struct ia32_sigframe4) == 408);
85 #endif
86
87 extern const char *freebsd32_syscallnames[];
88
89 static SYSCTL_NODE(_compat, OID_AUTO, ia32, CTLFLAG_RW, 0, "ia32 mode");
90
91 static u_long ia32_maxdsiz = IA32_MAXDSIZ;
92 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxdsiz, CTLFLAG_RW, &ia32_maxdsiz, 0, "");
93 TUNABLE_ULONG("compat.ia32.maxdsiz", &ia32_maxdsiz);
94 u_long ia32_maxssiz = IA32_MAXSSIZ;
95 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxssiz, CTLFLAG_RW, &ia32_maxssiz, 0, "");
96 TUNABLE_ULONG("compat.ia32.maxssiz", &ia32_maxssiz);
97 static u_long ia32_maxvmem = IA32_MAXVMEM;
98 SYSCTL_ULONG(_compat_ia32, OID_AUTO, maxvmem, CTLFLAG_RW, &ia32_maxvmem, 0, "");
99 TUNABLE_ULONG("compat.ia32.maxvmem", &ia32_maxvmem);
100
101 struct sysentvec ia32_freebsd_sysvec = {
102 .sv_size = FREEBSD32_SYS_MAXSYSCALL,
103 .sv_table = freebsd32_sysent,
104 .sv_mask = 0,
105 .sv_sigsize = 0,
106 .sv_sigtbl = NULL,
107 .sv_errsize = 0,
108 .sv_errtbl = NULL,
109 .sv_transtrap = NULL,
110 .sv_fixup = elf32_freebsd_fixup,
111 .sv_sendsig = ia32_sendsig,
112 .sv_sigcode = ia32_sigcode,
113 .sv_szsigcode = &sz_ia32_sigcode,
114 .sv_prepsyscall = NULL,
115 .sv_name = "FreeBSD ELF32",
116 .sv_coredump = elf32_coredump,
117 .sv_imgact_try = NULL,
118 .sv_minsigstksz = MINSIGSTKSZ,
119 .sv_pagesize = IA32_PAGE_SIZE,
120 .sv_minuser = FREEBSD32_MINUSER,
121 .sv_maxuser = FREEBSD32_MAXUSER,
122 .sv_usrstack = FREEBSD32_USRSTACK,
123 .sv_psstrings = FREEBSD32_PS_STRINGS,
124 .sv_stackprot = VM_PROT_ALL,
125 .sv_copyout_strings = freebsd32_copyout_strings,
126 .sv_setregs = ia32_setregs,
127 .sv_fixlimit = ia32_fixlimit,
128 .sv_maxssiz = &ia32_maxssiz,
129 .sv_flags = SV_ABI_FREEBSD | SV_IA32 | SV_ILP32 |
130 #ifdef __amd64__
131 SV_SHP
132 #else
133 0
134 #endif
135 ,
136 .sv_set_syscall_retval = ia32_set_syscall_retval,
137 .sv_fetch_syscall_args = ia32_fetch_syscall_args,
138 .sv_syscallnames = freebsd32_syscallnames,
139 .sv_shared_page_base = FREEBSD32_SHAREDPAGE,
140 .sv_shared_page_len = PAGE_SIZE,
141 .sv_schedtail = NULL,
142 .sv_thread_detach = NULL,
143 .sv_trap = NULL,
144 };
145 INIT_SYSENTVEC(elf_ia32_sysvec, &ia32_freebsd_sysvec);
146
147 static Elf32_Brandinfo ia32_brand_info = {
148 .brand = ELFOSABI_FREEBSD,
149 .machine = EM_386,
150 .compat_3_brand = "FreeBSD",
151 .emul_path = NULL,
152 .interp_path = "/libexec/ld-elf.so.1",
153 .sysvec = &ia32_freebsd_sysvec,
154 .interp_newpath = "/libexec/ld-elf32.so.1",
155 .brand_note = &elf32_freebsd_brandnote,
156 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
157 };
158
159 SYSINIT(ia32, SI_SUB_EXEC, SI_ORDER_MIDDLE,
160 (sysinit_cfunc_t) elf32_insert_brand_entry,
161 &ia32_brand_info);
162
163 static Elf32_Brandinfo ia32_brand_oinfo = {
164 .brand = ELFOSABI_FREEBSD,
165 .machine = EM_386,
166 .compat_3_brand = "FreeBSD",
167 .emul_path = NULL,
168 .interp_path = "/usr/libexec/ld-elf.so.1",
169 .sysvec = &ia32_freebsd_sysvec,
170 .interp_newpath = "/libexec/ld-elf32.so.1",
171 .brand_note = &elf32_freebsd_brandnote,
172 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
173 };
174
175 SYSINIT(oia32, SI_SUB_EXEC, SI_ORDER_ANY,
176 (sysinit_cfunc_t) elf32_insert_brand_entry,
177 &ia32_brand_oinfo);
178
179 static Elf32_Brandinfo kia32_brand_info = {
180 .brand = ELFOSABI_FREEBSD,
181 .machine = EM_386,
182 .compat_3_brand = "FreeBSD",
183 .emul_path = NULL,
184 .interp_path = "/lib/ld.so.1",
185 .sysvec = &ia32_freebsd_sysvec,
186 .brand_note = &elf32_kfreebsd_brandnote,
187 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE_MANDATORY
188 };
189
190 SYSINIT(kia32, SI_SUB_EXEC, SI_ORDER_ANY,
191 (sysinit_cfunc_t) elf32_insert_brand_entry,
192 &kia32_brand_info);
193
194 void
195 elf32_dump_thread(struct thread *td, void *dst, size_t *off)
196 {
197 #ifdef __amd64__
198 void *buf;
199 size_t len;
200
201 len = 0;
202 if (use_xsave) {
203 if (dst != NULL) {
204 fpugetregs(td);
205 len += elf32_populate_note(NT_X86_XSTATE,
206 get_pcb_user_save_td(td), dst,
207 cpu_max_ext_state_size, &buf);
208 *(uint64_t *)((char *)buf + X86_XSTATE_XCR0_OFFSET) =
209 xsave_mask;
210 } else
211 len += elf32_populate_note(NT_X86_XSTATE, NULL, NULL,
212 cpu_max_ext_state_size, NULL);
213 }
214 *off = len;
215 #endif
216 }
217
218 void
219 ia32_fixlimit(struct rlimit *rl, int which)
220 {
221
222 switch (which) {
223 case RLIMIT_DATA:
224 if (ia32_maxdsiz != 0) {
225 if (rl->rlim_cur > ia32_maxdsiz)
226 rl->rlim_cur = ia32_maxdsiz;
227 if (rl->rlim_max > ia32_maxdsiz)
228 rl->rlim_max = ia32_maxdsiz;
229 }
230 break;
231 case RLIMIT_STACK:
232 if (ia32_maxssiz != 0) {
233 if (rl->rlim_cur > ia32_maxssiz)
234 rl->rlim_cur = ia32_maxssiz;
235 if (rl->rlim_max > ia32_maxssiz)
236 rl->rlim_max = ia32_maxssiz;
237 }
238 break;
239 case RLIMIT_VMEM:
240 if (ia32_maxvmem != 0) {
241 if (rl->rlim_cur > ia32_maxvmem)
242 rl->rlim_cur = ia32_maxvmem;
243 if (rl->rlim_max > ia32_maxvmem)
244 rl->rlim_max = ia32_maxvmem;
245 }
246 break;
247 }
248 }
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