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 vnode_t *ex_vp; 108 char *emulator; 109 char *brandname; 110 char *auxp_brand; /* address of first brand auxv on user stack */ 111 } uarg_t; 112 113 /* 114 * Possible brand actions for exec. 115 */ 116 #define EBA_NONE 0 117 #define EBA_NATIVE 1 118 #define EBA_BRAND 2 119 120 /* 121 * The following macro is a machine dependent encapsulation of 122 * postfix processing to hide the stack direction from elf.c 123 * thereby making the elf.c code machine independent. 124 */ 125 #define execpoststack(ARGS, ARRAYADDR, BYTESIZE) \ 126 (copyout((caddr_t)(ARRAYADDR), (ARGS)->stackend, (BYTESIZE)) ? EFAULT \ 127 : (((ARGS)->stackend += (BYTESIZE)), 0)) 128 129 /* 130 * This provides the current user stack address for an object of size BYTESIZE. 131 * Used to determine the stack address just before applying execpoststack(). 132 */ 133 #define stackaddress(ARGS, BYTESIZE) ((ARGS)->stackend) 134 135 /* 136 * Macro to add attribute/values the aux vector under construction. 137 */ 138 /* BEGIN CSTYLED */ 139 #if ((_LONG_ALIGNMENT == (2 * _INT_ALIGNMENT)) || \ 140 (_POINTER_ALIGNMENT == (2 * _INT_ALIGNMENT))) 141 /* END CSTYLED */ 142 /* 143 * This convoluted stuff is necessitated by the fact that there is 144 * potential padding in the aux vector, but not necessarily and 145 * without clearing the padding there is a small, but potential 146 * security hole. 147 */ 148 #define ADDAUX(p, a, v) { \ 149 (&(p)->a_type)[1] = 0; \ 150 (p)->a_type = (a); \ 151 (p)->a_un.a_val = (v); \ 152 ++(p); \ 153 } 154 #else 155 #define ADDAUX(p, a, v) { \ 156 (p)->a_type = (a); \ 157 ((p)++)->a_un.a_val = (v); \ 158 } 159 #endif 160 161 #define INTPSZ MAXPATHLEN 162 typedef struct intpdata { 163 char *intp; 164 char *intp_name; 165 char *intp_arg; 166 } intpdata_t; 167 168 #define EXECSETID_SETID 0x1 /* setid exec */ 169 #define EXECSETID_UGIDS 0x2 /* [ug]ids mismatch */ 170 #define EXECSETID_PRIVS 0x4 /* more privs than before */ 171 172 struct execsw { 173 char *exec_magic; 174 int exec_magoff; 175 int exec_maglen; 176 int (*exec_func)(struct vnode *vp, struct execa *uap, 177 struct uarg *args, struct intpdata *idata, int level, 178 long *execsz, int setid, caddr_t exec_file, 179 struct cred *cred, int brand_action); 180 int (*exec_core)(struct vnode *vp, struct proc *p, 181 struct cred *cred, rlim64_t rlimit, int sig, 182 core_content_t content); 183 krwlock_t *exec_lock; 184 }; 185 186 extern short elfmagic; 187 extern short intpmagic; 188 extern short javamagic; 189 #if defined(__sparc) 190 extern short aout_zmagic; 191 extern short aout_nmagic; 192 extern short aout_omagic; 193 #endif 194 extern short nomagic; 195 196 extern char elf32magicstr[]; 197 extern char elf64magicstr[]; 198 extern char intpmagicstr[]; 199 extern char javamagicstr[]; 200 #if defined(__sparc) 201 extern char aout_nmagicstr[]; 202 extern char aout_zmagicstr[]; 203 extern char aout_omagicstr[]; 204 #endif 205 extern char nomagicstr[]; 206 207 extern int exec_args(execa_t *, uarg_t *, intpdata_t *, void **); 208 extern int exec(const char *fname, const char **argp); 209 extern int exece(const char *fname, const char **argp, const char **envp); 210 extern int exec_common(const char *fname, const char **argp, 211 const char **envp, int brand_action); 212 extern int gexec(vnode_t **vp, struct execa *uap, struct uarg *args, 213 struct intpdata *idata, int level, long *execsz, caddr_t exec_file, 214 struct cred *cred, int brand_action); 215 extern struct execsw *allocate_execsw(char *name, char *magic, 216 size_t magic_size); 217 extern struct execsw *findexecsw(char *magic); 218 extern struct execsw *findexec_by_hdr(char *header); 219 extern struct execsw *findexec_by_magic(char *magic); 220 extern int execpermissions(struct vnode *vp, struct vattr *vattrp, 221 struct uarg *args); 222 extern int execmap(vnode_t *vp, caddr_t addr, size_t len, size_t zfodlen, 223 off_t offset, int prot, int page, uint_t); 224 extern void setexecenv(struct execenv *ep); 225 extern int execopen(struct vnode **vpp, int *fdp); 226 extern int execclose(int fd); 227 extern void setregs(uarg_t *); 228 extern void exec_set_sp(size_t); 229 230 /* 231 * Utility functions for branded process executing 232 */ 233 #if !defined(_ELF32_COMPAT) 234 /* 235 * When compiling 64-bit kernels we don't want these definitions included 236 * when compiling the 32-bit compatability elf code in the elfexec module. 237 */ 238 extern int elfexec(vnode_t *, execa_t *, uarg_t *, intpdata_t *, int, 239 long *, int, caddr_t, cred_t *, int); 240 extern int mapexec_brand(vnode_t *, uarg_t *, Ehdr *, Addr *, 241 intptr_t *, caddr_t, int *, caddr_t *, caddr_t *, size_t *, uintptr_t *); 242 #endif /* !_ELF32_COMPAT */ 243 244 #if defined(_LP64) 245 extern int elf32exec(vnode_t *, execa_t *, uarg_t *, intpdata_t *, int, 246 long *, int, caddr_t, cred_t *, int); 247 extern int mapexec32_brand(vnode_t *, uarg_t *, Elf32_Ehdr *, Elf32_Addr *, 248 intptr_t *, caddr_t, int *, caddr_t *, caddr_t *, size_t *, uintptr_t *); 249 #endif /* _LP64 */ 250 251 /* 252 * Utility functions for exec module core routines: 253 */ 254 extern int core_seg(proc_t *, vnode_t *, offset_t, caddr_t, 255 size_t, rlim64_t, cred_t *); 256 257 extern int core_write(vnode_t *, enum uio_seg, offset_t, 258 const void *, size_t, rlim64_t, cred_t *); 259 260 /* a.out stuff */ 261 262 struct exec; 263 264 extern caddr_t gettmem(struct exec *exp); 265 extern caddr_t getdmem(struct exec *exp); 266 extern ulong_t getdfile(struct exec *exp); 267 extern uint_t gettfile(struct exec *exp); 268 extern int chkaout(struct exdata *exp); 269 extern void getexinfo(struct exdata *edp_in, struct exdata *edp_out, 270 int *pagetext, int *pagedata); 271 272 #endif /* _KERNEL */ 273 274 #ifdef __cplusplus 275 } 276 #endif 277 278 #endif /* _SYS_EXEC_H */ 279