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 uintptr_t commpage; 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 #define INTP_MAXDEPTH 5 /* Nested interpreter depth matches Linux */ 162 typedef struct intpdata { 163 char *intp; 164 char *intp_name[INTP_MAXDEPTH]; 165 char *intp_arg[INTP_MAXDEPTH]; 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 int nexectype; /* number of elements in execsw */ 187 extern struct execsw execsw[]; 188 extern kmutex_t execsw_lock; 189 190 extern short elfmagic; 191 extern short intpmagic; 192 extern short javamagic; 193 #if defined(__sparc) 194 extern short aout_zmagic; 195 extern short aout_nmagic; 196 extern short aout_omagic; 197 #endif 198 extern short nomagic; 199 200 extern char elf32magicstr[]; 201 extern char elf64magicstr[]; 202 extern char intpmagicstr[]; 203 extern char javamagicstr[]; 204 #if defined(__sparc) 205 extern char aout_nmagicstr[]; 206 extern char aout_zmagicstr[]; 207 extern char aout_omagicstr[]; 208 #endif 209 extern char nomagicstr[]; 210 211 extern int exec_args(execa_t *, uarg_t *, intpdata_t *, void **); 212 extern int exece(const char *fname, const char **argp, const char **envp); 213 extern int exec_common(const char *fname, const char **argp, 214 const char **envp, int brand_action); 215 extern int gexec(vnode_t **vp, struct execa *uap, struct uarg *args, 216 struct intpdata *idata, int level, long *execsz, caddr_t exec_file, 217 struct cred *cred, int brand_action); 218 extern struct execsw *allocate_execsw(char *name, char *magic, 219 size_t magic_size); 220 extern struct execsw *findexecsw(char *magic); 221 extern struct execsw *findexec_by_hdr(char *header); 222 extern struct execsw *findexec_by_magic(char *magic); 223 extern int execpermissions(struct vnode *vp, struct vattr *vattrp, 224 struct uarg *args); 225 extern int execmap(vnode_t *vp, caddr_t addr, size_t len, size_t zfodlen, 226 off_t offset, int prot, int page, uint_t); 227 extern void setexecenv(struct execenv *ep); 228 extern int execopen(struct vnode **vpp, int *fdp); 229 extern int execclose(int fd); 230 extern void setregs(uarg_t *); 231 extern void exec_set_sp(size_t); 232 233 /* 234 * Utility functions for branded process executing 235 */ 236 #if !defined(_ELF32_COMPAT) 237 /* 238 * When compiling 64-bit kernels we don't want these definitions included 239 * when compiling the 32-bit compatability elf code in the elfexec module. 240 */ 241 extern int elfexec(vnode_t *, execa_t *, uarg_t *, intpdata_t *, int, 242 long *, int, caddr_t, cred_t *, int); 243 extern int mapexec_brand(vnode_t *, uarg_t *, Ehdr *, Addr *, 244 intptr_t *, caddr_t, int *, caddr_t *, caddr_t *, size_t *, uintptr_t *); 245 #endif /* !_ELF32_COMPAT */ 246 247 #if defined(_LP64) 248 extern int elf32exec(vnode_t *, execa_t *, uarg_t *, intpdata_t *, int, 249 long *, int, caddr_t, cred_t *, int); 250 extern int mapexec32_brand(vnode_t *, uarg_t *, Elf32_Ehdr *, Elf32_Addr *, 251 intptr_t *, caddr_t, int *, caddr_t *, caddr_t *, size_t *, uintptr_t *); 252 #endif /* _LP64 */ 253 254 /* 255 * Utility functions for exec module core routines: 256 */ 257 extern int core_seg(proc_t *, vnode_t *, offset_t, caddr_t, 258 size_t, rlim64_t, cred_t *); 259 260 extern int core_write(vnode_t *, enum uio_seg, offset_t, 261 const void *, size_t, rlim64_t, cred_t *); 262 263 /* a.out stuff */ 264 265 struct exec; 266 267 extern caddr_t gettmem(struct exec *exp); 268 extern caddr_t getdmem(struct exec *exp); 269 extern ulong_t getdfile(struct exec *exp); 270 extern uint_t gettfile(struct exec *exp); 271 extern int chkaout(struct exdata *exp); 272 extern void getexinfo(struct exdata *edp_in, struct exdata *edp_out, 273 int *pagetext, int *pagedata); 274 275 #endif /* _KERNEL */ 276 277 #ifdef __cplusplus 278 } 279 #endif 280 281 #endif /* _SYS_EXEC_H */ 282