1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 30 #ifndef _SYS_EXEC_H 31 #define _SYS_EXEC_H 32 33 #pragma ident "%Z%%M% %I% %E% SMI" 34 35 #include <sys/systm.h> 36 #include <vm/seg.h> 37 #include <vm/seg_vn.h> 38 #include <sys/model.h> 39 #include <sys/uio.h> 40 #include <sys/corectl.h> 41 #include <sys/machelf.h> 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 /* 48 * Number of bytes to read for magic string 49 */ 50 #define MAGIC_BYTES 8 51 52 #define getexmag(x) (((x)[0] << 8) + (x)[1]) 53 54 typedef struct execa { 55 const char *fname; 56 const char **argp; 57 const char **envp; 58 } execa_t; 59 60 typedef struct execenv { 61 caddr_t ex_bssbase; 62 caddr_t ex_brkbase; 63 size_t ex_brksize; 64 vnode_t *ex_vp; 65 short ex_magic; 66 } execenv_t; 67 68 #ifdef _KERNEL 69 70 #define LOADABLE_EXEC(e) ((e)->exec_lock) 71 #define LOADED_EXEC(e) ((e)->exec_func) 72 73 extern int nexectype; /* number of elements in execsw */ 74 extern struct execsw execsw[]; 75 extern kmutex_t execsw_lock; 76 77 /* 78 * User argument structure for passing exec information around between the 79 * common and machine-dependent portions of exec and the exec modules. 80 */ 81 typedef struct uarg { 82 ssize_t na; 83 ssize_t ne; 84 ssize_t nc; 85 ssize_t arglen; 86 char *fname; 87 char *pathname; 88 ssize_t auxsize; 89 caddr_t stackend; 90 size_t stk_align; 91 size_t stk_size; 92 char *stk_base; 93 char *stk_strp; 94 int *stk_offp; 95 size_t usrstack_size; 96 uint_t stk_prot; 97 uint_t dat_prot; 98 int traceinval; 99 model_t to_model; 100 model_t from_model; 101 size_t to_ptrsize; 102 size_t from_ptrsize; 103 size_t ncargs; 104 struct execsw *execswp; 105 uintptr_t entry; 106 uintptr_t thrptr; 107 char *emulator; 108 char *brandname; 109 char *auxp_brand_phdr; /* addr of brand phdr auxv on user stack */ 110 } uarg_t; 111 112 /* 113 * Possible brand actions for exec. 114 */ 115 #define EBA_NONE 0 116 #define EBA_NATIVE 1 117 #define EBA_BRAND 2 118 119 /* 120 * The following macro is a machine dependent encapsulation of 121 * postfix processing to hide the stack direction from elf.c 122 * thereby making the elf.c code machine independent. 123 */ 124 #define execpoststack(ARGS, ARRAYADDR, BYTESIZE) \ 125 (copyout((caddr_t)(ARRAYADDR), (ARGS)->stackend, (BYTESIZE)) ? EFAULT \ 126 : (((ARGS)->stackend += (BYTESIZE)), 0)) 127 128 /* 129 * This provides the current user stack address for an object of size BYTESIZE. 130 * Used to determine the stack address just before applying execpoststack(). 131 */ 132 #define stackaddress(ARGS, BYTESIZE) ((ARGS)->stackend) 133 134 /* 135 * Macro to add attribute/values the aux vector under construction. 136 */ 137 /* BEGIN CSTYLED */ 138 #if ((_LONG_ALIGNMENT == (2 * _INT_ALIGNMENT)) || \ 139 (_POINTER_ALIGNMENT == (2 * _INT_ALIGNMENT))) 140 /* END CSTYLED */ 141 /* 142 * This convoluted stuff is necessitated by the fact that there is 143 * potential padding in the aux vector, but not necessarily and 144 * without clearing the padding there is a small, but potential 145 * security hole. 146 */ 147 #define ADDAUX(p, a, v) { \ 148 (&(p)->a_type)[1] = 0; \ 149 (p)->a_type = (a); \ 150 (p)->a_un.a_val = (v); \ 151 ++(p); \ 152 } 153 #else 154 #define ADDAUX(p, a, v) { \ 155 (p)->a_type = (a); \ 156 ((p)++)->a_un.a_val = (v); \ 157 } 158 #endif 159 160 #define INTPSZ MAXPATHLEN 161 typedef struct intpdata { 162 char *intp; 163 char *intp_name; 164 char *intp_arg; 165 } intpdata_t; 166 167 #define EXECSETID_SETID 0x1 /* setid exec */ 168 #define EXECSETID_UGIDS 0x2 /* [ug]ids mismatch */ 169 #define EXECSETID_PRIVS 0x4 /* more privs than before */ 170 171 struct execsw { 172 char *exec_magic; 173 int exec_magoff; 174 int exec_maglen; 175 int (*exec_func)(struct vnode *vp, struct execa *uap, 176 struct uarg *args, struct intpdata *idata, int level, 177 long *execsz, int setid, caddr_t exec_file, 178 struct cred *cred, int brand_action); 179 int (*exec_core)(struct vnode *vp, struct proc *p, 180 struct cred *cred, rlim64_t rlimit, int sig, 181 core_content_t content); 182 krwlock_t *exec_lock; 183 }; 184 185 extern short elfmagic; 186 extern short intpmagic; 187 extern short javamagic; 188 #if defined(__sparc) 189 extern short aout_zmagic; 190 extern short aout_nmagic; 191 extern short aout_omagic; 192 #endif 193 extern short nomagic; 194 195 extern char elf32magicstr[]; 196 extern char elf64magicstr[]; 197 extern char intpmagicstr[]; 198 extern char javamagicstr[]; 199 #if defined(__sparc) 200 extern char aout_nmagicstr[]; 201 extern char aout_zmagicstr[]; 202 extern char aout_omagicstr[]; 203 #endif 204 extern char nomagicstr[]; 205 206 extern int exec_args(execa_t *, uarg_t *, intpdata_t *, void **); 207 extern int exec(const char *fname, const char **argp); 208 extern int exece(const char *fname, const char **argp, const char **envp); 209 extern int exec_common(const char *fname, const char **argp, 210 const char **envp, int brand_action); 211 extern int gexec(vnode_t **vp, struct execa *uap, struct uarg *args, 212 struct intpdata *idata, int level, long *execsz, caddr_t exec_file, 213 struct cred *cred, int brand_action); 214 extern struct execsw *allocate_execsw(char *name, char *magic, 215 size_t magic_size); 216 extern struct execsw *findexecsw(char *magic); 217 extern struct execsw *findexec_by_hdr(char *header); 218 extern struct execsw *findexec_by_magic(char *magic); 219 extern int execpermissions(struct vnode *vp, struct vattr *vattrp, 220 struct uarg *args); 221 extern int execmap(vnode_t *vp, caddr_t addr, size_t len, size_t zfodlen, 222 off_t offset, int prot, int page, uint_t); 223 extern void setexecenv(struct execenv *ep); 224 extern int execopen(struct vnode **vpp, int *fdp); 225 extern int execclose(int fd); 226 extern void setregs(uarg_t *); 227 extern void exec_set_sp(size_t); 228 229 /* 230 * Utility functions for branded process executing 231 */ 232 #if !defined(_ELF32_COMPAT) 233 /* 234 * When compiling 64-bit kernels we don't want these definitions included 235 * when compiling the 32-bit compatability elf code in the elfexec module. 236 */ 237 extern int elfexec(vnode_t *, execa_t *, uarg_t *, intpdata_t *, int, 238 long *, int, caddr_t, cred_t *, int); 239 extern int mapexec_brand(vnode_t *, uarg_t *, Ehdr *, Addr *, 240 intptr_t *, caddr_t, int *, caddr_t *, caddr_t *, size_t *); 241 #endif /* !_ELF32_COMPAT */ 242 243 #if defined(_LP64) 244 extern int elf32exec(vnode_t *, execa_t *, uarg_t *, intpdata_t *, int, 245 long *, int, caddr_t, cred_t *, int); 246 extern int mapexec32_brand(vnode_t *, uarg_t *, Elf32_Ehdr *, Elf32_Addr *, 247 intptr_t *, caddr_t, int *, caddr_t *, caddr_t *, size_t *); 248 #endif /* _LP64 */ 249 250 /* 251 * Utility functions for exec module core routines: 252 */ 253 extern int core_seg(proc_t *, vnode_t *, offset_t, caddr_t, 254 size_t, rlim64_t, cred_t *); 255 256 extern int core_write(vnode_t *, enum uio_seg, offset_t, 257 const void *, size_t, rlim64_t, cred_t *); 258 259 /* a.out stuff */ 260 261 struct exec; 262 263 extern caddr_t gettmem(struct exec *exp); 264 extern caddr_t getdmem(struct exec *exp); 265 extern ulong_t getdfile(struct exec *exp); 266 extern uint_t gettfile(struct exec *exp); 267 extern int chkaout(struct exdata *exp); 268 extern void getexinfo(struct exdata *edp_in, struct exdata *edp_out, 269 int *pagetext, int *pagedata); 270 271 #endif /* _KERNEL */ 272 273 #ifdef __cplusplus 274 } 275 #endif 276 277 #endif /* _SYS_EXEC_H */ 278