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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1988 AT&T 24 * All Rights Reserved 25 * 26 * 27 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31 /* 32 * Local include file for ld library. 33 */ 34 35 #ifndef _LIBLD_DOT_H 36 #define _LIBLD_DOT_H 37 38 #pragma ident "%Z%%M% %I% %E% SMI" 39 40 #include <libld.h> 41 #include <conv.h> 42 #include <msg.h> 43 44 #ifdef __cplusplus 45 extern "C" { 46 #endif 47 48 /* 49 * Types of segment index. 50 */ 51 typedef enum { 52 LD_PHDR, LD_INTERP, LD_SUNWCAP, LD_TEXT, 53 LD_DATA, LD_BSS, LD_DYN, LD_DTRACE, 54 LD_NOTE, LD_SUNWBSS, LD_TLS, 55 #if defined(__x86) && defined(_ELF64) 56 LD_UNWIND, 57 #endif 58 LD_EXTRA, 59 LD_NUM 60 } Segment_ndx; 61 62 /* 63 * Structure to manage the update of weak symbols from their associated alias. 64 */ 65 typedef struct wk_desc { 66 Sym *wk_symtab; /* the .symtab entry */ 67 Sym *wk_dynsym; /* the .dynsym entry */ 68 Sym_desc *wk_weak; /* the original weak symbol */ 69 Sym_desc *wk_alias; /* the real symbol */ 70 } Wk_desc; 71 72 /* 73 * Structure to manage the support library interfaces. 74 */ 75 typedef struct func_list { 76 const char *fl_obj; /* name of support object */ 77 /* function is from */ 78 void (*fl_fptr)(); /* function pointer */ 79 uint_t fl_version; /* ld_version() level */ 80 } Func_list; 81 82 typedef struct support_list { 83 const char *sup_name; /* ld_support function name */ 84 List sup_funcs; /* list of support functions */ 85 } Support_list; 86 87 /* 88 * Structure to manage a sorted output relocation list. 89 * 90 * rl_key1 -> pointer to needed ndx 91 * rl_key2 -> pointer to symbol relocation is against 92 * rl_key3 -> virtual offset of relocation 93 */ 94 typedef struct reloc_list { 95 Sym_desc *rl_key2; 96 Xword rl_key3; 97 Rel_desc *rl_rsp; 98 Half rl_key1; 99 } Reloc_list; 100 101 102 typedef struct sym_s_list { 103 Word sl_hval; 104 Sym_desc * sl_sdp; 105 } Sym_s_list; 106 107 /* 108 * ld heap management structure 109 */ 110 typedef struct _ld_heap Ld_heap; 111 struct _ld_heap { 112 Ld_heap *lh_next; 113 void *lh_free; 114 void *lh_end; 115 }; 116 117 #define HEAPBLOCK 0x68000 /* default allocation block size */ 118 #define HEAPALIGN 0x8 /* heap blocks alignment requirement */ 119 120 /* 121 * Dynamic per-symbol filtee string table descriptor. This associates filtee 122 * strings that will be created in the .dynstr, with .dynamic entries. 123 */ 124 typedef struct { 125 char *dft_str; /* dynstr string */ 126 Word dft_flag; /* auxiliary/filtee type */ 127 Half dft_ndx; /* eventual ndx into .dynamic */ 128 } Dfltr_desc; 129 130 #define AL_CNT_DFLTR 4 131 132 /* 133 * Per-symbol filtee descriptor. This associates symbol definitions with 134 * their filtees. 135 */ 136 typedef struct { 137 Sym_desc *sft_sdp; /* symbol descriptor */ 138 Aliste sft_off; /* offset into dtstr descriptor */ 139 } Sfltr_desc; 140 141 #define AL_CNT_SFLTR 20 142 143 /* 144 * Return codes for {tls|got}_fixups() routines 145 */ 146 typedef enum { 147 FIX_ERROR, /* fatal error - time to punt */ 148 FIX_DONE, /* relocation done - no further processing required */ 149 FIX_RELOC /* do_reloc() relocation processing required */ 150 } Fixupret; 151 152 #ifndef FILENAME_MAX 153 #define FILENAME_MAX BUFSIZ /* maximum length of a path name */ 154 #endif 155 156 /* 157 * Relocation buckets are sized based on the number of input relocations and 158 * the following constants. 159 */ 160 #define REL_HAIDESCNO 1000 /* high water mark active buckets */ 161 #define REL_LAIDESCNO 50 /* low water mark active buckets */ 162 #define REL_HOIDESCNO 500 /* high water mark output buckets */ 163 #define REL_LOIDESCNO 10 /* low water mark output buckets */ 164 165 extern Ofl_desc Ofl; 166 extern char *Plibpath; 167 extern char *Llibdir; 168 extern char *Ulibdir; 169 extern Ehdr def_ehdr; 170 extern Ld_heap *ld_heap; 171 extern List lib_support; 172 extern const Msg reject[]; 173 extern uint_t dbg_mask; 174 175 extern int Verbose; 176 177 /* 178 * For backward compatibility provide a /dev/zero file descriptor. 179 */ 180 extern int dz_fd; 181 182 /* 183 * Local functions. 184 */ 185 extern uintptr_t add_actrel(Word, Rel_desc *, Ofl_desc *); 186 extern uintptr_t add_libdir(Ofl_desc *, const char *); 187 extern uintptr_t add_outrel(Word, Rel_desc *, Ofl_desc *); 188 extern uintptr_t add_regsym(Sym_desc *, Ofl_desc *); 189 extern void adj_movereloc(Ofl_desc *, Rel_desc *); 190 extern void *alist_append(Alist **, const void *, size_t, int); 191 extern Sym_desc * am_I_partial(Rel_desc *, Xword); 192 extern Ar_desc * ar_setup(const char *, Elf *, Ofl_desc *); 193 extern void ar_member(Ar_desc *, Elf_Arsym *, Ar_aux *, Ar_mem *); 194 #if defined(sparc) 195 extern uintptr_t allocate_got(Ofl_desc *); 196 extern uintptr_t assign_got(Sym_desc *); 197 #endif 198 extern uintptr_t assign_gotndx(List *, Gotndx *, Gotref, Ofl_desc *, 199 Rel_desc *, Sym_desc *); 200 extern void assign_plt_ndx(Sym_desc *, Ofl_desc *); 201 extern Xword calc_got_offset(Rel_desc *, Ofl_desc *); 202 extern Xword calc_plt_addr(Sym_desc *, Ofl_desc *); 203 extern int dbg_setup(const char *); 204 extern const char *demangle(const char *); 205 extern void disp_errmsg(const char *, Rel_desc *, Ofl_desc *); 206 extern uintptr_t do_activerelocs(Ofl_desc *); 207 extern void ent_check(Ofl_desc *); 208 extern uintptr_t fillin_gotplt1(Ofl_desc *); 209 extern Addr fillin_gotplt2(Ofl_desc *); 210 extern Gotndx * find_gotndx(List *, Gotref, Ofl_desc *, Rel_desc *); 211 extern uintptr_t find_library(const char *, Ofl_desc *); 212 extern Group_desc * get_group_desc(Ofl_desc *, Is_desc *); 213 extern Word hashbkts(Word); 214 extern Xword lcm(Xword, Xword); 215 extern int ldexit(void); 216 extern void ldmap_out(Ofl_desc *); 217 extern uintptr_t lib_setup(Ofl_desc *); 218 extern Listnode * list_where(List *, Word); 219 extern void init(); 220 extern Word init_rel(Rel_desc *, void *); 221 extern const char *is_regsym(Ifl_desc *, Sym *, const char *, int, Word, 222 const char *, Word *); 223 extern void mach_eflags(Ehdr *, Ofl_desc *); 224 extern void mach_make_dynamic(Ofl_desc *, size_t *); 225 extern void mach_update_odynamic(Ofl_desc *, Dyn **); 226 extern int mach_sym_typecheck(Sym_desc *, Sym *, Ifl_desc *, 227 Ofl_desc *); 228 extern uintptr_t make_bss(Ofl_desc *, Xword, Xword, uint_t); 229 extern uintptr_t make_got(Ofl_desc *); 230 extern uintptr_t make_reloc(Ofl_desc *, Os_desc *); 231 extern uintptr_t make_sunwbss(Ofl_desc *, size_t, Xword); 232 extern uintptr_t make_sunwdata(Ofl_desc *, size_t, Xword); 233 extern uintptr_t make_sunwmove(Ofl_desc *, int); 234 extern uintptr_t map_parse(const char *, Ofl_desc *); 235 extern uintptr_t perform_outreloc(Rel_desc *, Ofl_desc *); 236 extern Os_desc * place_section(Ofl_desc *, Is_desc *, int, Word); 237 extern uintptr_t process_archive(const char *, int, Ar_desc *, 238 Ofl_desc *); 239 extern uintptr_t process_flags(Ofl_desc *, int, char **); 240 extern uintptr_t process_files(Ofl_desc *, int, char **); 241 extern Ifl_desc * process_ifl(const char *, const char *, int, Elf *, 242 Half, Ofl_desc *, Rej_desc *); 243 extern uintptr_t process_ordered(Ifl_desc *, Ofl_desc *, Word, Word); 244 extern uintptr_t process_section(const char *, Ifl_desc *, Shdr *, 245 Elf_Scn *, Word, int, Ofl_desc *); 246 extern uintptr_t process_sym_reloc(Ofl_desc *, Rel_desc *, Rel *, 247 Is_desc *, const char *); 248 extern int reg_check(Sym_desc *, Sym *, const char *, Ifl_desc *, 249 Ofl_desc *); 250 extern int reg_enter(Sym_desc *, Ofl_desc *); 251 extern Sym_desc * reg_find(Sym *, Ofl_desc *); 252 extern uintptr_t reloc_local(Rel_desc *, Ofl_desc *); 253 extern uintptr_t reloc_plt(Rel_desc *, Ofl_desc *); 254 extern uintptr_t reloc_register(Rel_desc *, Is_desc *, Ofl_desc *); 255 extern uintptr_t reloc_relobj(Boolean, Rel_desc *, Ofl_desc *); 256 extern void reloc_remain_entry(Rel_desc *, Os_desc *, Ofl_desc *); 257 extern uintptr_t reloc_GOT_relative(Boolean, Rel_desc *, Ofl_desc *); 258 extern uintptr_t reloc_GOTOP(Boolean, Rel_desc *, Ofl_desc *); 259 extern uintptr_t reloc_TLS(Boolean, Rel_desc *, Ofl_desc *); 260 extern uintptr_t sort_ordered(Ofl_desc *); 261 extern uintptr_t sort_seg_list(Ofl_desc *); 262 extern void sym_adjust_vis(Sym_desc *, Ofl_desc *); 263 extern int sym_avl_comp(const void *, const void *); 264 extern uintptr_t sym_copy(Sym_desc *); 265 extern uintptr_t sym_nodirect(Is_desc *, Ifl_desc *, Ofl_desc *); 266 extern uintptr_t sym_process(Is_desc *, Ifl_desc *, Ofl_desc *); 267 extern uintptr_t sym_resolve(Sym_desc *, Sym *, Ifl_desc *, Ofl_desc *, 268 int, Word, Word); 269 extern uintptr_t sym_spec(Ofl_desc *); 270 extern uintptr_t vers_def_process(Is_desc *, Ifl_desc *, Ofl_desc *); 271 extern uintptr_t vers_need_process(Is_desc *, Ifl_desc *, Ofl_desc *); 272 extern int vers_sym_process(Is_desc *, Ifl_desc *); 273 extern uintptr_t vers_check_need(Ofl_desc *); 274 extern void vers_promote(Sym_desc *, Word, Ifl_desc *, Ofl_desc *); 275 extern int vers_verify(Ofl_desc *); 276 277 /* 278 * AMD64 - 64-bit specific functions 279 */ 280 #if defined(__x86) && defined(_ELF64) 281 extern uintptr_t make_amd64_unwindhdr(Ofl_desc *); 282 extern uintptr_t process_amd64_unwind(const char *, Ifl_desc *, Shdr *, 283 Elf_Scn *, Word, int, Ofl_desc *); 284 extern uintptr_t populate_amd64_unwindhdr(Ofl_desc *); 285 extern uintptr_t append_amd64_unwind(Os_desc *, Ofl_desc *); 286 #endif 287 288 #ifdef __cplusplus 289 } 290 #endif 291 292 #endif /* _LIBLD_DOT_H */ 293