linux32_exec_elf32.c revision 1.1.10.2
1 1.1.10.2 simonb /* $NetBSD: linux32_exec_elf32.c,v 1.1.10.2 2006/04/22 11:38:14 simonb Exp $ */ 2 1.1.10.2 simonb 3 1.1.10.2 simonb /*- 4 1.1.10.2 simonb * Copyright (c) 1995, 1998, 2000, 2001,2006 The NetBSD Foundation, Inc. 5 1.1.10.2 simonb * All rights reserved. 6 1.1.10.2 simonb * 7 1.1.10.2 simonb * This code is derived from software contributed to The NetBSD Foundation 8 1.1.10.2 simonb * by Christos Zoulas, Frank van der Linden, Eric Haszlakiewicz and 9 1.1.10.2 simonb * Emmanuel Dreyfus. 10 1.1.10.2 simonb * 11 1.1.10.2 simonb * Redistribution and use in source and binary forms, with or without 12 1.1.10.2 simonb * modification, are permitted provided that the following conditions 13 1.1.10.2 simonb * are met: 14 1.1.10.2 simonb * 1. Redistributions of source code must retain the above copyright 15 1.1.10.2 simonb * notice, this list of conditions and the following disclaimer. 16 1.1.10.2 simonb * 2. Redistributions in binary form must reproduce the above copyright 17 1.1.10.2 simonb * notice, this list of conditions and the following disclaimer in the 18 1.1.10.2 simonb * documentation and/or other materials provided with the distribution. 19 1.1.10.2 simonb * 3. All advertising materials mentioning features or use of this software 20 1.1.10.2 simonb * must display the following acknowledgement: 21 1.1.10.2 simonb * This product includes software developed by the NetBSD 22 1.1.10.2 simonb * Foundation, Inc. and its contributors. 23 1.1.10.2 simonb * 4. Neither the name of The NetBSD Foundation nor the names of its 24 1.1.10.2 simonb * contributors may be used to endorse or promote products derived 25 1.1.10.2 simonb * from this software without specific prior written permission. 26 1.1.10.2 simonb * 27 1.1.10.2 simonb * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 1.1.10.2 simonb * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 1.1.10.2 simonb * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 1.1.10.2 simonb * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 1.1.10.2 simonb * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 1.1.10.2 simonb * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 1.1.10.2 simonb * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 1.1.10.2 simonb * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 1.1.10.2 simonb * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 1.1.10.2 simonb * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 1.1.10.2 simonb * POSSIBILITY OF SUCH DAMAGE. 38 1.1.10.2 simonb */ 39 1.1.10.2 simonb 40 1.1.10.2 simonb #include <sys/cdefs.h> 41 1.1.10.2 simonb __KERNEL_RCSID(0, "$NetBSD: linux32_exec_elf32.c,v 1.1.10.2 2006/04/22 11:38:14 simonb Exp $"); 42 1.1.10.2 simonb 43 1.1.10.2 simonb #define ELFSIZE 32 44 1.1.10.2 simonb 45 1.1.10.2 simonb #include <sys/param.h> 46 1.1.10.2 simonb #include <sys/systm.h> 47 1.1.10.2 simonb #include <sys/proc.h> 48 1.1.10.2 simonb #include <sys/malloc.h> 49 1.1.10.2 simonb #include <sys/vnode.h> 50 1.1.10.2 simonb #include <sys/exec.h> 51 1.1.10.2 simonb #include <sys/exec_elf.h> 52 1.1.10.2 simonb #include <sys/kernel.h> 53 1.1.10.2 simonb #include <sys/resourcevar.h> 54 1.1.10.2 simonb #include <sys/signal.h> 55 1.1.10.2 simonb #include <sys/signalvar.h> 56 1.1.10.2 simonb 57 1.1.10.2 simonb #include <compat/linux/common/linux_exec.h> 58 1.1.10.2 simonb #include <compat/netbsd32/netbsd32.h> 59 1.1.10.2 simonb #include <compat/netbsd32/netbsd32_exec.h> 60 1.1.10.2 simonb #include <compat/linux32/common/linux32_exec.h> 61 1.1.10.2 simonb 62 1.1.10.2 simonb #include <machine/frame.h> 63 1.1.10.2 simonb 64 1.1.10.2 simonb #ifdef DEBUG_LINUX 65 1.1.10.2 simonb #define DPRINTF(a) uprintf a 66 1.1.10.2 simonb #else 67 1.1.10.2 simonb #define DPRINTF(a) 68 1.1.10.2 simonb #endif 69 1.1.10.2 simonb 70 1.1.10.2 simonb #if 0 71 1.1.10.2 simonb static int ELFNAME2(linux32,signature) __P((struct lwp *, struct exec_package *, 72 1.1.10.2 simonb Elf_Ehdr *, char *)); 73 1.1.10.2 simonb #ifdef LINUX_GCC_SIGNATURE 74 1.1.10.2 simonb static int ELFNAME2(linux32,gcc_signature) __P((struct lwp *l, 75 1.1.10.2 simonb struct exec_package *, Elf_Ehdr *)); 76 1.1.10.2 simonb #endif 77 1.1.10.2 simonb #ifdef LINUX_ATEXIT_SIGNATURE 78 1.1.10.2 simonb static int ELFNAME2(linux32,atexit_signature) __P((struct lwp *l, 79 1.1.10.2 simonb struct exec_package *, Elf_Ehdr *)); 80 1.1.10.2 simonb #endif 81 1.1.10.2 simonb #endif 82 1.1.10.2 simonb int linux32_copyinargs(struct exec_package *, struct ps_strings *, 83 1.1.10.2 simonb void *, size_t, const void *, const void *); 84 1.1.10.2 simonb 85 1.1.10.2 simonb int 86 1.1.10.2 simonb ELFNAME2(linux32,probe)(l, epp, eh, itp, pos) 87 1.1.10.2 simonb struct lwp *l; 88 1.1.10.2 simonb struct exec_package *epp; 89 1.1.10.2 simonb void *eh; 90 1.1.10.2 simonb char *itp; 91 1.1.10.2 simonb vaddr_t *pos; 92 1.1.10.2 simonb { 93 1.1.10.2 simonb int error; 94 1.1.10.2 simonb 95 1.1.10.2 simonb if (((error = ELFNAME2(linux,signature)(l, epp, eh, itp)) != 0) && 96 1.1.10.2 simonb #ifdef LINUX_GCC_SIGNATURE 97 1.1.10.2 simonb ((error = ELFNAME2(linux,gcc_signature)(l, epp, eh)) != 0) && 98 1.1.10.2 simonb #endif 99 1.1.10.2 simonb #ifdef LINUX_ATEXIT_SIGNATURE 100 1.1.10.2 simonb ((error = ELFNAME2(linux,atexit_signature)(l, epp, eh)) != 0) && 101 1.1.10.2 simonb #endif 102 1.1.10.2 simonb 1) 103 1.1.10.2 simonb return error; 104 1.1.10.2 simonb 105 1.1.10.2 simonb if (itp) { 106 1.1.10.2 simonb if ((error = emul_find_interp(l, epp->ep_esch->es_emul->e_path, 107 1.1.10.2 simonb itp))) 108 1.1.10.2 simonb return (error); 109 1.1.10.2 simonb } 110 1.1.10.2 simonb #if 0 111 1.1.10.2 simonb DPRINTF(("linux32_probe: returning 0\n")); 112 1.1.10.2 simonb #endif 113 1.1.10.2 simonb 114 1.1.10.2 simonb epp->ep_flags |= EXEC_32; 115 1.1.10.2 simonb epp->ep_vm_minaddr = VM_MIN_ADDRESS; 116 1.1.10.2 simonb epp->ep_vm_maxaddr = USRSTACK32; 117 1.1.10.2 simonb 118 1.1.10.2 simonb return 0; 119 1.1.10.2 simonb } 120 1.1.10.2 simonb 121 1.1.10.2 simonb /* round up and down to page boundaries. */ 122 1.1.10.2 simonb #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 123 1.1.10.2 simonb #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 124 1.1.10.2 simonb 125 1.1.10.2 simonb /* 126 1.1.10.2 simonb * Copy arguments onto the stack in the normal way, but add some 127 1.1.10.2 simonb * extra information in case of dynamic binding. 128 1.1.10.2 simonb */ 129 1.1.10.2 simonb int 130 1.1.10.2 simonb linux32_elf32_copyargs(struct lwp *l, struct exec_package *pack, 131 1.1.10.2 simonb struct ps_strings *arginfo, char **stackp, void *argp) 132 1.1.10.2 simonb { 133 1.1.10.2 simonb struct linux32_extra_stack_data *esdp, esd; 134 1.1.10.2 simonb struct elf_args *ap; 135 1.1.10.2 simonb struct vattr *vap; 136 1.1.10.2 simonb struct proc *p; 137 1.1.10.2 simonb Elf_Ehdr *eh; 138 1.1.10.2 simonb Elf_Phdr *ph; 139 1.1.10.2 simonb Elf_Addr phdr = 0; 140 1.1.10.2 simonb u_long phsize; 141 1.1.10.2 simonb int error; 142 1.1.10.2 simonb int i; 143 1.1.10.2 simonb 144 1.1.10.2 simonb p = l->l_proc; 145 1.1.10.2 simonb 146 1.1.10.2 simonb if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0) 147 1.1.10.2 simonb return error; 148 1.1.10.2 simonb 149 1.1.10.2 simonb /* 150 1.1.10.2 simonb * Push extra arguments on the stack needed by dynamically 151 1.1.10.2 simonb * linked binaries and static binaries as well. 152 1.1.10.2 simonb */ 153 1.1.10.2 simonb memset(&esd, 0, sizeof(esd)); 154 1.1.10.2 simonb esdp = (struct linux32_extra_stack_data *)(*stackp); 155 1.1.10.2 simonb ap = (struct elf_args *)pack->ep_emul_arg; 156 1.1.10.2 simonb vap = pack->ep_vap; 157 1.1.10.2 simonb eh = (Elf_Ehdr *)pack->ep_hdr; 158 1.1.10.2 simonb 159 1.1.10.2 simonb /* 160 1.1.10.2 simonb * We forgot this, so we ned to reload it now. XXX keep track of it? 161 1.1.10.2 simonb */ 162 1.1.10.2 simonb if (ap == NULL) { 163 1.1.10.2 simonb phsize = eh->e_phnum * sizeof(Elf_Phdr); 164 1.1.10.2 simonb ph = (Elf_Phdr *)malloc(phsize, M_TEMP, M_WAITOK); 165 1.1.10.2 simonb error = exec_read_from(l, pack->ep_vp, eh->e_phoff, ph, phsize); 166 1.1.10.2 simonb if (error != 0) { 167 1.1.10.2 simonb for (i = 0; i < eh->e_phnum; i++) { 168 1.1.10.2 simonb if (ph[i].p_type == PT_PHDR) { 169 1.1.10.2 simonb phdr = ph[i].p_vaddr; 170 1.1.10.2 simonb break; 171 1.1.10.2 simonb } 172 1.1.10.2 simonb } 173 1.1.10.2 simonb } 174 1.1.10.2 simonb free(ph, M_TEMP); 175 1.1.10.2 simonb } 176 1.1.10.2 simonb 177 1.1.10.2 simonb 178 1.1.10.2 simonb /* 179 1.1.10.2 simonb * The exec_package doesn't have a proc pointer and it's not 180 1.1.10.2 simonb * exactly trivial to add one since the credentials are 181 1.1.10.2 simonb * changing. XXX Linux uses curlwp's credentials. 182 1.1.10.2 simonb * Why can't we use them too? 183 1.1.10.2 simonb */ 184 1.1.10.2 simonb 185 1.1.10.2 simonb i = 0; 186 1.1.10.2 simonb esd.ai[i].a_type = LINUX_AT_SYSINFO; 187 1.1.10.2 simonb esd.ai[i++].a_v = (netbsd32_pointer_t)(long)&esdp->kernel_vsyscall[0]; 188 1.1.10.2 simonb 189 1.1.10.2 simonb esd.ai[i].a_type = LINUX_AT_SYSINFO_EHDR; 190 1.1.10.2 simonb esd.ai[i++].a_v = (netbsd32_pointer_t)(long)&esdp->elfhdr; 191 1.1.10.2 simonb 192 1.1.10.2 simonb esd.ai[i].a_type = LINUX_AT_HWCAP; 193 1.1.10.2 simonb esd.ai[i++].a_v = LINUX32_CPUCAP; 194 1.1.10.2 simonb 195 1.1.10.2 simonb esd.ai[i].a_type = AT_PAGESZ; 196 1.1.10.2 simonb esd.ai[i++].a_v = PAGE_SIZE; 197 1.1.10.2 simonb 198 1.1.10.2 simonb esd.ai[i].a_type = LINUX_AT_CLKTCK; 199 1.1.10.2 simonb esd.ai[i++].a_v = hz; 200 1.1.10.2 simonb 201 1.1.10.2 simonb esd.ai[i].a_type = AT_PHDR; 202 1.1.10.2 simonb esd.ai[i++].a_v = (ap ? ap->arg_phaddr: phdr); 203 1.1.10.2 simonb 204 1.1.10.2 simonb esd.ai[i].a_type = AT_PHENT; 205 1.1.10.2 simonb esd.ai[i++].a_v = (ap ? ap->arg_phentsize : eh->e_phentsize); 206 1.1.10.2 simonb 207 1.1.10.2 simonb esd.ai[i].a_type = AT_PHNUM; 208 1.1.10.2 simonb esd.ai[i++].a_v = (ap ? ap->arg_phnum : eh->e_phnum); 209 1.1.10.2 simonb 210 1.1.10.2 simonb esd.ai[i].a_type = AT_BASE; 211 1.1.10.2 simonb esd.ai[i++].a_v = (ap ? ap->arg_interp : 0); 212 1.1.10.2 simonb 213 1.1.10.2 simonb esd.ai[i].a_type = AT_FLAGS; 214 1.1.10.2 simonb esd.ai[i++].a_v = 0; 215 1.1.10.2 simonb 216 1.1.10.2 simonb esd.ai[i].a_type = AT_ENTRY; 217 1.1.10.2 simonb esd.ai[i++].a_v = (ap ? ap->arg_entry : eh->e_entry); 218 1.1.10.2 simonb 219 1.1.10.2 simonb esd.ai[i].a_type = LINUX_AT_EGID; 220 1.1.10.2 simonb esd.ai[i++].a_v = 221 1.1.10.2 simonb ((vap->va_mode & S_ISGID) ? vap->va_gid : p->p_ucred->cr_gid); 222 1.1.10.2 simonb 223 1.1.10.2 simonb esd.ai[i].a_type = LINUX_AT_GID; 224 1.1.10.2 simonb esd.ai[i++].a_v = p->p_cred->p_rgid; 225 1.1.10.2 simonb 226 1.1.10.2 simonb esd.ai[i].a_type = LINUX_AT_EUID; 227 1.1.10.2 simonb esd.ai[i++].a_v = 228 1.1.10.2 simonb ((vap->va_mode & S_ISUID) ? vap->va_uid : p->p_ucred->cr_uid); 229 1.1.10.2 simonb 230 1.1.10.2 simonb esd.ai[i].a_type = LINUX_AT_UID; 231 1.1.10.2 simonb esd.ai[i++].a_v = p->p_cred->p_ruid; 232 1.1.10.2 simonb 233 1.1.10.2 simonb esd.ai[i].a_type = LINUX_AT_SECURE; 234 1.1.10.2 simonb esd.ai[i++].a_v = 0; 235 1.1.10.2 simonb 236 1.1.10.2 simonb esd.ai[i].a_type = LINUX_AT_PLATFORM; 237 1.1.10.2 simonb esd.ai[i++].a_v = (netbsd32_pointer_t)(long)&esdp->hw_platform[0]; 238 1.1.10.2 simonb 239 1.1.10.2 simonb esd.ai[i].a_type = AT_NULL; 240 1.1.10.2 simonb esd.ai[i++].a_v = 0; 241 1.1.10.2 simonb 242 1.1.10.2 simonb #ifdef DEBUG_LINUX 243 1.1.10.2 simonb if (i != LINUX32_ELF_AUX_ENTRIES) { 244 1.1.10.2 simonb printf("linux32_elf32_copyargs: %d Aux entries\n", i); 245 1.1.10.2 simonb return EINVAL; 246 1.1.10.2 simonb } 247 1.1.10.2 simonb #endif 248 1.1.10.2 simonb 249 1.1.10.2 simonb memcpy(esd.kernel_vsyscall, linux32_kernel_vsyscall, 250 1.1.10.2 simonb sizeof(linux32_kernel_vsyscall)); 251 1.1.10.2 simonb 252 1.1.10.2 simonb memcpy(&esd.elfhdr, eh, sizeof(*eh)); 253 1.1.10.2 simonb 254 1.1.10.2 simonb strcpy(esd.hw_platform, LINUX32_PLATFORM); 255 1.1.10.2 simonb 256 1.1.10.2 simonb if (ap) { 257 1.1.10.2 simonb free((char *)ap, M_TEMP); 258 1.1.10.2 simonb pack->ep_emul_arg = NULL; 259 1.1.10.2 simonb } 260 1.1.10.2 simonb 261 1.1.10.2 simonb /* 262 1.1.10.2 simonb * Copy out the ELF auxiliary table and hw platform name 263 1.1.10.2 simonb */ 264 1.1.10.2 simonb if ((error = copyout(&esd, esdp, sizeof(esd))) != 0) 265 1.1.10.2 simonb return error; 266 1.1.10.2 simonb *stackp += sizeof(esd); 267 1.1.10.2 simonb return 0; 268 1.1.10.2 simonb } 269 1.1.10.2 simonb 270
Indexes created Tue Sep 30 20:09:53 GMT 2025