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 2006 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 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 /* 47 * Number of bytes to read for magic string 48 */ 49 #define MAGIC_BYTES 8 50 51 #define getexmag(x) (((x)[0] << 8) + (x)[1]) 52 53 typedef struct execa { 54 const char *fname; 55 const char **argp; 56 const char **envp; 57 } execa_t; 58 59 typedef struct execenv { 60 caddr_t ex_bssbase; 61 caddr_t ex_brkbase; 62 size_t ex_brksize; 63 vnode_t *ex_vp; 64 short ex_magic; 65 } execenv_t; 66 67 #ifdef _KERNEL 68 69 #define LOADABLE_EXEC(e) ((e)->exec_lock) 70 #define LOADED_EXEC(e) ((e)->exec_func) 71 72 extern int nexectype; /* number of elements in execsw */ 73 extern struct execsw execsw[]; 74 extern kmutex_t execsw_lock; 75 76 /* 77 * User argument structure for passing exec information around between the 78 * common and machine-dependent portions of exec and the exec modules. 79 */ 80 typedef struct uarg { 81 ssize_t na; 82 ssize_t ne; 83 ssize_t nc; 84 ssize_t arglen; 85 char *fname; 86 char *pathname; 87 ssize_t auxsize; 88 caddr_t stackend; 89 size_t stk_align; 90 size_t stk_size; 91 char *stk_base; 92 char *stk_strp; 93 int *stk_offp; 94 size_t usrstack_size; 95 uint_t stk_prot; 96 uint_t dat_prot; 97 int traceinval; 98 model_t to_model; 99 model_t from_model; 100 size_t to_ptrsize; 101 size_t from_ptrsize; 102 size_t ncargs; 103 struct execsw *execswp; 104 uintptr_t entry; 105 uintptr_t thrptr; 106 char *emulator; 107 char *brandname; 108 auxv32_t *brand_auxp; /* starting user addr of brand auxvs on stack */ 109 } uarg_t; 110 111 /* 112 * Possible brand actions for exec. 113 */ 114 #define EBA_NONE 0 115 #define EBA_NATIVE 1 116 #define EBA_BRAND 2 117 118 /* 119 * The following macro is a machine dependent encapsulation of 120 * postfix processing to hide the stack direction from elf.c 121 * thereby making the elf.c code machine independent. 122 */ 123 #define execpoststack(ARGS, ARRAYADDR, BYTESIZE) \ 124 (copyout((caddr_t)(ARRAYADDR), (ARGS)->stackend, (BYTESIZE)) ? EFAULT \ 125 : (((ARGS)->stackend += (BYTESIZE)), 0)) 126 127 /* 128 * This provides the current user stack address for an object of size BYTESIZE. 129 * Used to determine the stack address just before applying execpoststack(). 130 */ 131 #define stackaddress(ARGS, BYTESIZE) ((ARGS)->stackend) 132 133 /* 134 * Macro to add attribute/values the aux vector under construction. 135 */ 136 /* BEGIN CSTYLED */ 137 #if ((_LONG_ALIGNMENT == (2 * _INT_ALIGNMENT)) || \ 138 (_POINTER_ALIGNMENT == (2 * _INT_ALIGNMENT))) 139 /* END CSTYLED */ 140 /* 141 * This convoluted stuff is necessitated by the fact that there is 142 * potential padding in the aux vector, but not necessarily and 143 * without clearing the padding there is a small, but potential 144 * security hole. 145 */ 146 #define ADDAUX(p, a, v) { \ 147 (&(p)->a_type)[1] = 0; \ 148 (p)->a_type = (a); \ 149 (p)->a_un.a_val = (v); \ 150 ++(p); \ 151 } 152 #else 153 #define ADDAUX(p, a, v) { \ 154 (p)->a_type = (a); \ 155 ((p)++)->a_un.a_val = (v); \ 156 } 157 #endif 158 159 #define INTPSZ MAXPATHLEN 160 typedef struct intpdata { 161 char *intp; 162 char *intp_name; 163 char *intp_arg; 164 } intpdata_t; 165 166 #define EXECSETID_SETID 0x1 /* setid exec */ 167 #define EXECSETID_UGIDS 0x2 /* [ug]ids mismatch */ 168 #define EXECSETID_PRIVS 0x4 /* more privs than before */ 169 170 struct execsw { 171 char *exec_magic; 172 int exec_magoff; 173 int exec_maglen; 174 int (*exec_func)(struct vnode *vp, struct execa *uap, 175 struct uarg *args, struct intpdata *idata, int level, 176 long *execsz, int setid, caddr_t exec_file, 177 struct cred *cred, int brand_action); 178 int (*exec_core)(struct vnode *vp, struct proc *p, 179 struct cred *cred, rlim64_t rlimit, int sig, 180 core_content_t content); 181 krwlock_t *exec_lock; 182 }; 183 184 extern short elfmagic; 185 extern short intpmagic; 186 extern short javamagic; 187 #if defined(__sparc) 188 extern short aout_zmagic; 189 extern short aout_nmagic; 190 extern short aout_omagic; 191 #endif 192 extern short nomagic; 193 194 extern char elf32magicstr[]; 195 extern char elf64magicstr[]; 196 extern char intpmagicstr[]; 197 extern char javamagicstr[]; 198 #if defined(__sparc) 199 extern char aout_nmagicstr[]; 200 extern char aout_zmagicstr[]; 201 extern char aout_omagicstr[]; 202 #endif 203 extern char nomagicstr[]; 204 205 extern int exec_args(execa_t *, uarg_t *, intpdata_t *, void **); 206 extern int exec(const char *fname, const char **argp); 207 extern int exece(const char *fname, const char **argp, const char **envp); 208 extern int exec_common(const char *fname, const char **argp, 209 const char **envp, int brand_action); 210 extern int gexec(vnode_t **vp, struct execa *uap, struct uarg *args, 211 struct intpdata *idata, int level, long *execsz, caddr_t exec_file, 212 struct cred *cred, int brand_action); 213 extern struct execsw *allocate_execsw(char *name, char *magic, 214 size_t magic_size); 215 extern struct execsw *findexecsw(char *magic); 216 extern struct execsw *findexec_by_hdr(char *header); 217 extern struct execsw *findexec_by_magic(char *magic); 218 extern int execpermissions(struct vnode *vp, struct vattr *vattrp, 219 struct uarg *args); 220 extern int execmap(vnode_t *vp, caddr_t addr, size_t len, size_t zfodlen, 221 off_t offset, int prot, int page, uint_t); 222 extern void setexecenv(struct execenv *ep); 223 extern int execopen(struct vnode **vpp, int *fdp); 224 extern int execclose(int fd); 225 extern void setregs(uarg_t *); 226 extern void exec_set_sp(size_t); 227 228 /* 229 * Utility functions for exec module core routines: 230 */ 231 extern int core_seg(proc_t *, vnode_t *, offset_t, caddr_t, 232 size_t, rlim64_t, cred_t *); 233 234 extern int core_write(vnode_t *, enum uio_seg, offset_t, 235 const void *, size_t, rlim64_t, cred_t *); 236 237 /* a.out stuff */ 238 239 struct exec; 240 241 extern caddr_t gettmem(struct exec *exp); 242 extern caddr_t getdmem(struct exec *exp); 243 extern ulong_t getdfile(struct exec *exp); 244 extern uint_t gettfile(struct exec *exp); 245 extern int chkaout(struct exdata *exp); 246 extern void getexinfo(struct exdata *edp_in, struct exdata *edp_out, 247 int *pagetext, int *pagedata); 248 249 #endif /* _KERNEL */ 250 251 #ifdef __cplusplus 252 } 253 #endif 254 255 #endif /* _SYS_EXEC_H */ 256