sys/compat/svr4_32/svr4_32_exec_elf32.c

   1 /*      $NetBSD: svr4_32_exec_elf32.c,v 1.19 2007/12/08 18:36:27 dsl Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1994 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Christos Zoulas.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: svr4_32_exec_elf32.c,v 1.19 2007/12/08 18:36:27 dsl Exp $");
  34
  35 #define ELFSIZE         32                              /* XXX should die */
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/proc.h>
  41 #include <sys/malloc.h>
  42 #include <sys/namei.h>
  43 #include <sys/vnode.h>
  44 #include <sys/exec_elf.h>
  45 #include <sys/exec.h>
  46
  47 #include <sys/mman.h>
  48
  49 #include <sys/cpu.h>
  50 #include <machine/reg.h>
  51
  52 #include <compat/svr4_32/svr4_32_types.h>
  53 #include <compat/svr4_32/svr4_32_util.h>
  54 #include <compat/svr4_32/svr4_32_exec.h>
  55 #include <compat/netbsd32/netbsd32_exec.h>
  56 #include <compat/svr4/svr4_errno.h>
  57
  58 /*
  59  * Since this only works on 64-bit machines trying to execute
  60  * 32-bit binaries, it's pretty much limited to sparc64
  61  * trying to run solaris binaries.  So, to simplify this
  62  * I'm making this svr4_32_copyargs() SPARC/Solaris specific
  63  * so we can run Solaris 8 dynamic binaries that require
  64  * lots of fancy specialized support.
  65  */
  66
  67 int sun_flags = EF_SPARC_SUN_US1|EF_SPARC_32PLUS;
  68 int sun_hwcap = (AV_SPARC_HWMUL_32x32|AV_SPARC_HWDIV_32x32|AV_SPARC_HWFSMULD);
  69
  70 #if 0
  71 int
  72 svr4_32_copyargs(struct lwp *l, struct exec_package *pack, struct ps_strings *arginfo, char **stackp, void *argp)
  73 {
  74         size_t len;
  75         AuxInfo ai[SVR4_32_AUX_ARGSIZ], *a, *platform=NULL, *exec=NULL;
  76         struct elf_args *ap;
  77         extern char machine_model[];
  78         int error;
  79
  80         if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0)
  81                 return error;
  82
  83         a = ai;
  84
  85         /*
  86          * Push extra arguments on the stack needed by dynamically
  87          * linked binaries
  88          */
  89         if ((ap = (struct elf_args *)pack->ep_emul_arg)) {
  90                 struct proc *p = curproc; /* XXXXX */
  91
  92                 a->a_type = AT_SUN_PLATFORM;
  93                 platform = a; /* Patch this later. */
  94                 a++;
  95
  96                 if (pack->ep_ndp->ni_cnd.cn_flags & HASBUF) {
  97                         a->a_type = AT_SUN_EXECNAME;
  98                         exec = a; /* Patch this later. */
  99                         a++;
 100                 }
 101
 102                 a->a_type = AT_PHDR;
 103                 a->a_v = ap->arg_phaddr;
 104                 a++;
 105
 106                 a->a_type = AT_PHENT;
 107                 a->a_v = ap->arg_phentsize;
 108                 a++;
 109
 110                 a->a_type = AT_PHNUM;
 111                 a->a_v = ap->arg_phnum;
 112                 a++;
 113
 114                 a->a_type = AT_ENTRY;
 115                 a->a_v = ap->arg_entry;
 116                 a++;
 117
 118                 a->a_type = AT_BASE;
 119                 a->a_v = ap->arg_interp;
 120                 a++;
 121
 122                 if (sun_flags) {
 123                         a->a_type = AT_FLAGS;
 124                         a->a_v = sun_flags;
 125                         a++;
 126                 }
 127
 128                 a->a_type = AT_PAGESZ;
 129                 a->a_v = PAGE_SIZE;
 130                 a++;
 131
 132                 a->a_type = AT_EUID;
 133                 a->a_v = kauth_cred_geteuid(l->l_cred);
 134                 a++;
 135
 136                 a->a_type = AT_RUID;
 137                 a->a_v = kauth_cred_getuid(l->l_cred);
 138                 a++;
 139
 140                 a->a_type = AT_EGID;
 141                 a->a_v = kauth_cred_getegid(l->l_cred);
 142                 a++;
 143
 144                 a->a_type = AT_RGID;
 145                 a->a_v = kauth_cred_getgid(l->l_cred);
 146                 a++;
 147
 148                 if (sun_hwcap) {
 149                         a->a_type = AT_SUN_HWCAP;
 150                         a->a_v = sun_hwcap;
 151                         a++;
 152                 }
 153
 154                 free((char *)ap, M_TEMP);
 155                 pack->ep_emul_arg = NULL;
 156         }
 157
 158         a->a_type = AT_NULL;
 159         a->a_v = 0;
 160         a++;
 161
 162         len = (a - ai) * sizeof(AuxInfo);
 163
 164         if (platform) {
 165                 char *ptr = (char *)a;
 166                 const char *path = NULL;
 167
 168                 /* Copy out the platform name. */
 169                 platform->a_v = (u_long)(*stackp) + len;
 170                 /* XXXX extremely inefficient.... */
 171                 strcpy(ptr, machine_model);
 172                 ptr += strlen(machine_model) + 1;
 173                 len += strlen(machine_model) + 1;
 174
 175                 if (exec) {
 176                         path = pack->ep_ndp->ni_cnd.cn_pnbuf;
 177
 178                         /* Copy out the file we're executing. */
 179                         exec->a_v = (u_long)(*stackp) + len;
 180                         strcpy(ptr, path);
 181                         len += strlen(ptr)+1;
 182                 }
 183
 184                 /* Round to 32-bits */
 185                 len = (len+7)&~0x7L;
 186         }
 187         if ((error = copyout(ai, *stackp, len)) != 0)
 188                 return error;
 189         *stackp += len;
 190
 191         return error;
 192 }
 193 #else
 194 int
 195 svr4_32_copyargs(struct lwp *l, struct exec_package *pack, struct ps_strings *arginfo, char **stackp, void *argp)
 196 {
 197         size_t len;
 198         AuxInfo ai[SVR4_32_AUX_ARGSIZ], *a;
 199         struct elf_args *ap;
 200         int error;
 201
 202         if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0)
 203                 return error;
 204
 205         a = ai;
 206
 207         /*
 208          * Push extra arguments on the stack needed by dynamically
 209          * linked binaries
 210          */
 211         if ((ap = (struct elf_args *)pack->ep_emul_arg)) {
 212
 213                 a->a_type = AT_PHDR;
 214                 a->a_v = ap->arg_phaddr;
 215                 a++;
 216
 217                 a->a_type = AT_PHENT;
 218                 a->a_v = ap->arg_phentsize;
 219                 a++;
 220
 221                 a->a_type = AT_PHNUM;
 222                 a->a_v = ap->arg_phnum;
 223                 a++;
 224
 225                 a->a_type = AT_PAGESZ;
 226                 a->a_v = PAGE_SIZE;
 227                 a++;
 228
 229                 a->a_type = AT_BASE;
 230                 a->a_v = ap->arg_interp;
 231                 a++;
 232
 233                 a->a_type = AT_ENTRY;
 234                 a->a_v = ap->arg_entry;
 235                 a++;
 236
 237                 if (sun_flags) {
 238                         a->a_type = AT_FLAGS;
 239                         a->a_v = sun_flags;
 240                         a++;
 241                 }
 242
 243                 free((char *)ap, M_TEMP);
 244                 pack->ep_emul_arg = NULL;
 245         }
 246
 247         a->a_type = AT_NULL;
 248         a->a_v = 0;
 249         a++;
 250
 251         len = (a - ai) * sizeof(AuxInfo);
 252         if (copyout(ai, *stackp, len))
 253                 return error;
 254         *stackp += len;
 255
 256         return 0;
 257 }
 258 #endif
 259
 260 int
 261 svr4_32_elf32_probe(struct lwp *l, struct exec_package *epp, void *eh, char *itp, vaddr_t *pos)
 262 {
 263         int error;
 264
 265         if (itp) {
 266                 if ((error = emul_find_interp(l, epp, itp)))
 267                         return error;
 268         }
 269         epp->ep_flags |= EXEC_32;
 270 #ifdef SVR4_32_INTERP_ADDR
 271         *pos = SVR4_32_INTERP_ADDR;
 272 #endif
 273         return 0;
 274 }