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 /* 23 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 #ifndef _SYS_EXEC_H 30 #define _SYS_EXEC_H 31 32 #include <sys/systm.h> 33 #include <vm/seg.h> 34 #include <vm/seg_vn.h> 35 #include <sys/model.h> 36 #include <sys/uio.h> 37 #include <sys/corectl.h> 38 #include <sys/machelf.h> 39 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 /* 45 * Number of bytes to read for magic string 46 */ 47 #define MAGIC_BYTES 8 48 49 #define getexmag(x) (((x)[0] << 8) + (x)[1]) 50 51 typedef struct execa { 52 const char *fname; 53 const char **argp; 54 const char **envp; 55 } execa_t; 56 57 typedef struct execenv { 58 caddr_t ex_bssbase; 59 caddr_t ex_brkbase; 60 size_t ex_brksize; 61 vnode_t *ex_vp; 62 short ex_magic; 63 } execenv_t; 64 65 #ifdef _KERNEL 66 67 #define LOADABLE_EXEC(e) ((e)->exec_lock) 68 #define LOADED_EXEC(e) ((e)->exec_func) 69 70 71 /* 72 * User argument structure for passing exec information around between the 73 * common and machine-dependent portions of exec and the exec modules. 74 */ 75 typedef struct uarg { 76 ssize_t na; 77 ssize_t ne; 78 ssize_t nc; 79 ssize_t arglen; 80 char *fname; 81 char *pathname; 82 ssize_t auxsize; 83 caddr_t stackend; 84 size_t stk_align; 85 size_t stk_size; 86 char *stk_base; 87 char *stk_strp; 88 int *stk_offp; 89 size_t usrstack_size; 90 uint_t stk_prot; 91 uint_t dat_prot; 92 int traceinval; 93 int addr32; 94 model_t to_model; 95 model_t from_model; 96 size_t to_ptrsize; 97 size_t from_ptrsize; 98 size_t ncargs; 99 struct execsw *execswp; 100 uintptr_t entry; 101 uintptr_t thrptr; 102 vnode_t *ex_vp; 103 char *emulator; 104 char *brandname; 105 char *auxp_auxflags; /* addr of auxflags auxv on the user stack */ 106 char *auxp_brand; /* address of first brand auxv on user stack */ 107 cred_t *pfcred; 108 boolean_t scrubenv; 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 #define INTP_MAXDEPTH 5 /* Nested interpreter depth matches Linux */ 161 typedef struct intpdata { 162 char *intp; 163 char *intp_name[INTP_MAXDEPTH]; 164 char *intp_arg[INTP_MAXDEPTH]; 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 int nexectype; /* number of elements in execsw */ 186 extern struct execsw execsw[]; 187 extern kmutex_t execsw_lock; 188 189 extern short elfmagic; 190 extern short intpmagic; 191 extern short javamagic; 192 #if defined(__sparc) 193 extern short aout_zmagic; 194 extern short aout_nmagic; 195 extern short aout_omagic; 196 #endif 197 extern short nomagic; 198 199 extern char elf32magicstr[]; 200 extern char elf64magicstr[]; 201 extern char intpmagicstr[]; 202 extern char javamagicstr[]; 203 #if defined(__sparc) 204 extern char aout_nmagicstr[]; 205 extern char aout_zmagicstr[]; 206 extern char aout_omagicstr[]; 207 #endif 208 extern char nomagicstr[]; 209 210 extern int exec_args(execa_t *, uarg_t *, intpdata_t *, void **); 211 extern int exece(const char *fname, const char **argp, const char **envp); 212 extern int exec_common(const char *fname, const char **argp, 213 const char **envp, int brand_action); 214 extern int gexec(vnode_t **vp, struct execa *uap, struct uarg *args, 215 struct intpdata *idata, int level, long *execsz, caddr_t exec_file, 216 struct cred *cred, int brand_action); 217 extern struct execsw *allocate_execsw(char *name, char *magic, 218 size_t magic_size); 219 extern struct execsw *findexecsw(char *magic); 220 extern struct execsw *findexec_by_hdr(char *header); 221 extern struct execsw *findexec_by_magic(char *magic); 222 extern int execpermissions(struct vnode *vp, struct vattr *vattrp, 223 struct uarg *args); 224 extern int execmap(vnode_t *vp, caddr_t addr, size_t len, size_t zfodlen, 225 off_t offset, int prot, int page, uint_t); 226 extern void setexecenv(struct execenv *ep); 227 extern int execopen(struct vnode **vpp, int *fdp); 228 extern int execclose(int fd); 229 extern void setregs(uarg_t *); 230 extern void exec_set_sp(size_t); 231 232 /* 233 * Utility functions for branded process executing 234 */ 235 #if !defined(_ELF32_COMPAT) 236 /* 237 * When compiling 64-bit kernels we don't want these definitions included 238 * when compiling the 32-bit compatability elf code in the elfexec module. 239 */ 240 extern int elfexec(vnode_t *, execa_t *, uarg_t *, intpdata_t *, int, 241 long *, int, caddr_t, cred_t *, int); 242 extern int mapexec_brand(vnode_t *, uarg_t *, Ehdr *, Addr *, 243 intptr_t *, caddr_t, int *, caddr_t *, caddr_t *, size_t *, uintptr_t *); 244 #endif /* !_ELF32_COMPAT */ 245 246 #if defined(_LP64) 247 extern int elf32exec(vnode_t *, execa_t *, uarg_t *, intpdata_t *, int, 248 long *, int, caddr_t, cred_t *, int); 249 extern int mapexec32_brand(vnode_t *, uarg_t *, Elf32_Ehdr *, Elf32_Addr *, 250 intptr_t *, caddr_t, int *, caddr_t *, caddr_t *, size_t *, uintptr_t *); 251 #endif /* _LP64 */ 252 253 /* 254 * Utility functions for exec module core routines: 255 */ 256 extern int core_seg(proc_t *, vnode_t *, offset_t, caddr_t, 257 size_t, rlim64_t, cred_t *); 258 259 extern int core_write(vnode_t *, enum uio_seg, offset_t, 260 const void *, size_t, rlim64_t, cred_t *); 261 262 /* a.out stuff */ 263 264 struct exec; 265 266 extern caddr_t gettmem(struct exec *exp); 267 extern caddr_t getdmem(struct exec *exp); 268 extern ulong_t getdfile(struct exec *exp); 269 extern uint_t gettfile(struct exec *exp); 270 extern int chkaout(struct exdata *exp); 271 extern void getexinfo(struct exdata *edp_in, struct exdata *edp_out, 272 int *pagetext, int *pagedata); 273 274 #endif /* _KERNEL */ 275 276 #ifdef __cplusplus 277 } 278 #endif 279 280 #endif /* _SYS_EXEC_H */ 281