1178479Sjb/* 2178479Sjb * CDDL HEADER START 3178479Sjb * 4178479Sjb * The contents of this file are subject to the terms of the 5178479Sjb * Common Development and Distribution License, Version 1.0 only 6178479Sjb * (the "License"). You may not use this file except in compliance 7178479Sjb * with the License. 8178479Sjb * 9178479Sjb * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10178479Sjb * or http://www.opensolaris.org/os/licensing. 11178479Sjb * See the License for the specific language governing permissions 12178479Sjb * and limitations under the License. 13178479Sjb * 14178479Sjb * When distributing Covered Code, include this CDDL HEADER in each 15178479Sjb * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16178479Sjb * If applicable, add the following below this CDDL HEADER, with the 17178479Sjb * fields enclosed by brackets "[]" replaced with your own identifying 18178479Sjb * information: Portions Copyright [yyyy] [name of copyright owner] 19178479Sjb * 20178479Sjb * CDDL HEADER END 21178479Sjb */ 22178479Sjb/* 23178479Sjb * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 24178479Sjb * Use is subject to license terms. 25178479Sjb */ 26178479Sjb 27178479Sjb#pragma ident "%Z%%M% %I% %E% SMI" 28178479Sjb 29178479Sjb#include <sys/types.h> 30178479Sjb#include <sys/stat.h> 31178479Sjb#include <sys/mman.h> 32178548Sjb#include <sys/zmod.h> 33178479Sjb#include <ctf_impl.h> 34178479Sjb#include <unistd.h> 35178479Sjb#include <fcntl.h> 36178479Sjb#include <errno.h> 37178548Sjb#if defined(sun) 38178479Sjb#include <dlfcn.h> 39178548Sjb#else 40178548Sjb#include <zlib.h> 41178548Sjb#endif 42178479Sjb#include <gelf.h> 43178479Sjb 44178548Sjb#if defined(sun) 45178479Sjb#ifdef _LP64 46178479Sjbstatic const char *_libctf_zlib = "/usr/lib/64/libz.so"; 47178479Sjb#else 48178479Sjbstatic const char *_libctf_zlib = "/usr/lib/libz.so"; 49178479Sjb#endif 50178548Sjb#endif 51178479Sjb 52178479Sjbstatic struct { 53178479Sjb int (*z_uncompress)(uchar_t *, ulong_t *, const uchar_t *, ulong_t); 54178479Sjb const char *(*z_error)(int); 55178479Sjb void *z_dlp; 56178479Sjb} zlib; 57178479Sjb 58178479Sjbstatic size_t _PAGESIZE; 59178479Sjbstatic size_t _PAGEMASK; 60178479Sjb 61178548Sjb#if defined(sun) 62178479Sjb#pragma init(_libctf_init) 63178548Sjb#else 64178548Sjbvoid _libctf_init(void) __attribute__ ((constructor)); 65178548Sjb#endif 66178479Sjbvoid 67178479Sjb_libctf_init(void) 68178479Sjb{ 69178548Sjb#if defined(sun) 70178479Sjb const char *p = getenv("LIBCTF_DECOMPRESSOR"); 71178479Sjb 72178479Sjb if (p != NULL) 73178479Sjb _libctf_zlib = p; /* use alternate decompression library */ 74178548Sjb#endif 75178479Sjb 76178479Sjb _libctf_debug = getenv("LIBCTF_DEBUG") != NULL; 77178479Sjb 78178479Sjb _PAGESIZE = getpagesize(); 79178479Sjb _PAGEMASK = ~(_PAGESIZE - 1); 80178479Sjb} 81178479Sjb 82178479Sjb/* 83178479Sjb * Attempt to dlopen the decompression library and locate the symbols of 84178479Sjb * interest that we will need to call. This information in cached so 85178479Sjb * that multiple calls to ctf_bufopen() do not need to reopen the library. 86178479Sjb */ 87178479Sjbvoid * 88178479Sjbctf_zopen(int *errp) 89178479Sjb{ 90178548Sjb#if defined(sun) 91178479Sjb ctf_dprintf("decompressing CTF data using %s\n", _libctf_zlib); 92178479Sjb 93178479Sjb if (zlib.z_dlp != NULL) 94178479Sjb return (zlib.z_dlp); /* library is already loaded */ 95178479Sjb 96178479Sjb if (access(_libctf_zlib, R_OK) == -1) 97178479Sjb return (ctf_set_open_errno(errp, ECTF_ZMISSING)); 98178479Sjb 99178479Sjb if ((zlib.z_dlp = dlopen(_libctf_zlib, RTLD_LAZY | RTLD_LOCAL)) == NULL) 100178479Sjb return (ctf_set_open_errno(errp, ECTF_ZINIT)); 101178479Sjb 102178548Sjb zlib.z_uncompress = (int (*)(uchar_t *, ulong_t *, const uchar_t *, ulong_t)) dlsym(zlib.z_dlp, "uncompress"); 103178548Sjb zlib.z_error = (const char *(*)(int)) dlsym(zlib.z_dlp, "zError"); 104178479Sjb 105178479Sjb if (zlib.z_uncompress == NULL || zlib.z_error == NULL) { 106178479Sjb (void) dlclose(zlib.z_dlp); 107178479Sjb bzero(&zlib, sizeof (zlib)); 108178479Sjb return (ctf_set_open_errno(errp, ECTF_ZINIT)); 109178479Sjb } 110178548Sjb#else 111178548Sjb zlib.z_uncompress = uncompress; 112178548Sjb zlib.z_error = zError; 113178479Sjb 114178548Sjb /* Dummy return variable as 'no error' */ 115178548Sjb zlib.z_dlp = (void *) (uintptr_t) 1; 116178548Sjb#endif 117178548Sjb 118178479Sjb return (zlib.z_dlp); 119178479Sjb} 120178479Sjb 121178479Sjb/* 122178479Sjb * The ctf_bufopen() routine calls these subroutines, defined by <sys/zmod.h>, 123178479Sjb * which we then patch through to the functions in the decompression library. 124178479Sjb */ 125178479Sjbint 126178479Sjbz_uncompress(void *dst, size_t *dstlen, const void *src, size_t srclen) 127178479Sjb{ 128178479Sjb return (zlib.z_uncompress(dst, (ulong_t *)dstlen, src, srclen)); 129178479Sjb} 130178479Sjb 131178479Sjbconst char * 132178479Sjbz_strerror(int err) 133178479Sjb{ 134178479Sjb return (zlib.z_error(err)); 135178479Sjb} 136178479Sjb 137178479Sjb/* 138178479Sjb * Convert a 32-bit ELF file header into GElf. 139178479Sjb */ 140178479Sjbstatic void 141178479Sjbehdr_to_gelf(const Elf32_Ehdr *src, GElf_Ehdr *dst) 142178479Sjb{ 143178479Sjb bcopy(src->e_ident, dst->e_ident, EI_NIDENT); 144178479Sjb dst->e_type = src->e_type; 145178479Sjb dst->e_machine = src->e_machine; 146178479Sjb dst->e_version = src->e_version; 147178479Sjb dst->e_entry = (Elf64_Addr)src->e_entry; 148178479Sjb dst->e_phoff = (Elf64_Off)src->e_phoff; 149178479Sjb dst->e_shoff = (Elf64_Off)src->e_shoff; 150178479Sjb dst->e_flags = src->e_flags; 151178479Sjb dst->e_ehsize = src->e_ehsize; 152178479Sjb dst->e_phentsize = src->e_phentsize; 153178479Sjb dst->e_phnum = src->e_phnum; 154178479Sjb dst->e_shentsize = src->e_shentsize; 155178479Sjb dst->e_shnum = src->e_shnum; 156178479Sjb dst->e_shstrndx = src->e_shstrndx; 157178479Sjb} 158178479Sjb 159178479Sjb/* 160178479Sjb * Convert a 32-bit ELF section header into GElf. 161178479Sjb */ 162178479Sjbstatic void 163178479Sjbshdr_to_gelf(const Elf32_Shdr *src, GElf_Shdr *dst) 164178479Sjb{ 165178479Sjb dst->sh_name = src->sh_name; 166178479Sjb dst->sh_type = src->sh_type; 167178479Sjb dst->sh_flags = src->sh_flags; 168178479Sjb dst->sh_addr = src->sh_addr; 169178479Sjb dst->sh_offset = src->sh_offset; 170178479Sjb dst->sh_size = src->sh_size; 171178479Sjb dst->sh_link = src->sh_link; 172178479Sjb dst->sh_info = src->sh_info; 173178479Sjb dst->sh_addralign = src->sh_addralign; 174178479Sjb dst->sh_entsize = src->sh_entsize; 175178479Sjb} 176178479Sjb 177178479Sjb/* 178178479Sjb * In order to mmap a section from the ELF file, we must round down sh_offset 179178479Sjb * to the previous page boundary, and mmap the surrounding page. We store 180178479Sjb * the pointer to the start of the actual section data back into sp->cts_data. 181178479Sjb */ 182178479Sjbconst void * 183178479Sjbctf_sect_mmap(ctf_sect_t *sp, int fd) 184178479Sjb{ 185178479Sjb size_t pageoff = sp->cts_offset & ~_PAGEMASK; 186178479Sjb 187178479Sjb caddr_t base = mmap64(NULL, sp->cts_size + pageoff, PROT_READ, 188178479Sjb MAP_PRIVATE, fd, sp->cts_offset & _PAGEMASK); 189178479Sjb 190178479Sjb if (base != MAP_FAILED) 191178479Sjb sp->cts_data = base + pageoff; 192178479Sjb 193178479Sjb return (base); 194178479Sjb} 195178479Sjb 196178479Sjb/* 197178479Sjb * Since sp->cts_data has the adjusted offset, we have to again round down 198178479Sjb * to get the actual mmap address and round up to get the size. 199178479Sjb */ 200178479Sjbvoid 201178479Sjbctf_sect_munmap(const ctf_sect_t *sp) 202178479Sjb{ 203178479Sjb uintptr_t addr = (uintptr_t)sp->cts_data; 204178479Sjb uintptr_t pageoff = addr & ~_PAGEMASK; 205178479Sjb 206178479Sjb (void) munmap((void *)(addr - pageoff), sp->cts_size + pageoff); 207178479Sjb} 208178479Sjb 209178479Sjb/* 210178479Sjb * Open the specified file descriptor and return a pointer to a CTF container. 211178479Sjb * The file can be either an ELF file or raw CTF file. The caller is 212178479Sjb * responsible for closing the file descriptor when it is no longer needed. 213178479Sjb */ 214178479Sjbctf_file_t * 215178479Sjbctf_fdopen(int fd, int *errp) 216178479Sjb{ 217178479Sjb ctf_sect_t ctfsect, symsect, strsect; 218178479Sjb ctf_file_t *fp = NULL; 219178479Sjb 220178479Sjb struct stat64 st; 221178479Sjb ssize_t nbytes; 222178479Sjb 223178479Sjb union { 224178479Sjb ctf_preamble_t ctf; 225178479Sjb Elf32_Ehdr e32; 226178479Sjb GElf_Ehdr e64; 227178479Sjb } hdr; 228178479Sjb 229178479Sjb bzero(&ctfsect, sizeof (ctf_sect_t)); 230178479Sjb bzero(&symsect, sizeof (ctf_sect_t)); 231178479Sjb bzero(&strsect, sizeof (ctf_sect_t)); 232178479Sjb bzero(&hdr.ctf, sizeof (hdr)); 233178479Sjb 234178479Sjb if (fstat64(fd, &st) == -1) 235178479Sjb return (ctf_set_open_errno(errp, errno)); 236178479Sjb 237178479Sjb if ((nbytes = pread64(fd, &hdr.ctf, sizeof (hdr), 0)) <= 0) 238178479Sjb return (ctf_set_open_errno(errp, nbytes < 0? errno : ECTF_FMT)); 239178479Sjb 240178479Sjb /* 241178479Sjb * If we have read enough bytes to form a CTF header and the magic 242178479Sjb * string matches, attempt to interpret the file as raw CTF. 243178479Sjb */ 244178548Sjb if (nbytes >= (ssize_t) sizeof (ctf_preamble_t) && 245178479Sjb hdr.ctf.ctp_magic == CTF_MAGIC) { 246178479Sjb if (hdr.ctf.ctp_version > CTF_VERSION) 247178479Sjb return (ctf_set_open_errno(errp, ECTF_CTFVERS)); 248178479Sjb 249178479Sjb ctfsect.cts_data = mmap64(NULL, st.st_size, PROT_READ, 250178479Sjb MAP_PRIVATE, fd, 0); 251178479Sjb 252178479Sjb if (ctfsect.cts_data == MAP_FAILED) 253178479Sjb return (ctf_set_open_errno(errp, errno)); 254178479Sjb 255178479Sjb ctfsect.cts_name = _CTF_SECTION; 256178479Sjb ctfsect.cts_type = SHT_PROGBITS; 257178479Sjb ctfsect.cts_flags = SHF_ALLOC; 258178479Sjb ctfsect.cts_size = (size_t)st.st_size; 259178479Sjb ctfsect.cts_entsize = 1; 260178479Sjb ctfsect.cts_offset = 0; 261178479Sjb 262178479Sjb if ((fp = ctf_bufopen(&ctfsect, NULL, NULL, errp)) == NULL) 263178479Sjb ctf_sect_munmap(&ctfsect); 264178479Sjb 265178479Sjb return (fp); 266178479Sjb } 267178479Sjb 268178479Sjb /* 269178479Sjb * If we have read enough bytes to form an ELF header and the magic 270178479Sjb * string matches, attempt to interpret the file as an ELF file. We 271178479Sjb * do our own largefile ELF processing, and convert everything to 272178479Sjb * GElf structures so that clients can operate on any data model. 273178479Sjb */ 274178548Sjb if (nbytes >= (ssize_t) sizeof (Elf32_Ehdr) && 275178479Sjb bcmp(&hdr.e32.e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0) { 276178479Sjb#ifdef _BIG_ENDIAN 277178479Sjb uchar_t order = ELFDATA2MSB; 278178479Sjb#else 279178479Sjb uchar_t order = ELFDATA2LSB; 280178479Sjb#endif 281178479Sjb GElf_Half i, n; 282178479Sjb GElf_Shdr *sp; 283178479Sjb 284178479Sjb void *strs_map; 285178479Sjb size_t strs_mapsz; 286178548Sjb char *strs; 287178479Sjb 288178479Sjb if (hdr.e32.e_ident[EI_DATA] != order) 289178479Sjb return (ctf_set_open_errno(errp, ECTF_ENDIAN)); 290178479Sjb if (hdr.e32.e_version != EV_CURRENT) 291178479Sjb return (ctf_set_open_errno(errp, ECTF_ELFVERS)); 292178479Sjb 293178479Sjb if (hdr.e32.e_ident[EI_CLASS] == ELFCLASS64) { 294178548Sjb if (nbytes < (ssize_t) sizeof (GElf_Ehdr)) 295178479Sjb return (ctf_set_open_errno(errp, ECTF_FMT)); 296178479Sjb } else { 297178479Sjb Elf32_Ehdr e32 = hdr.e32; 298178479Sjb ehdr_to_gelf(&e32, &hdr.e64); 299178479Sjb } 300178479Sjb 301178479Sjb if (hdr.e64.e_shstrndx >= hdr.e64.e_shnum) 302178479Sjb return (ctf_set_open_errno(errp, ECTF_CORRUPT)); 303178479Sjb 304178479Sjb n = hdr.e64.e_shnum; 305178479Sjb nbytes = sizeof (GElf_Shdr) * n; 306178479Sjb 307178479Sjb if ((sp = malloc(nbytes)) == NULL) 308178479Sjb return (ctf_set_open_errno(errp, errno)); 309178479Sjb 310178479Sjb /* 311178479Sjb * Read in and convert to GElf the array of Shdr structures 312178479Sjb * from e_shoff so we can locate sections of interest. 313178479Sjb */ 314178479Sjb if (hdr.e32.e_ident[EI_CLASS] == ELFCLASS32) { 315178479Sjb Elf32_Shdr *sp32; 316178479Sjb 317178479Sjb nbytes = sizeof (Elf32_Shdr) * n; 318178479Sjb 319178479Sjb if ((sp32 = malloc(nbytes)) == NULL || pread64(fd, 320178479Sjb sp32, nbytes, hdr.e64.e_shoff) != nbytes) { 321178479Sjb free(sp); 322178479Sjb return (ctf_set_open_errno(errp, errno)); 323178479Sjb } 324178479Sjb 325178479Sjb for (i = 0; i < n; i++) 326178479Sjb shdr_to_gelf(&sp32[i], &sp[i]); 327178479Sjb 328178479Sjb free(sp32); 329178479Sjb 330178479Sjb } else if (pread64(fd, sp, nbytes, hdr.e64.e_shoff) != nbytes) { 331178479Sjb free(sp); 332178479Sjb return (ctf_set_open_errno(errp, errno)); 333178479Sjb } 334178479Sjb 335178479Sjb /* 336178479Sjb * Now mmap the section header strings section so that we can 337178479Sjb * perform string comparison on the section names. 338178479Sjb */ 339178479Sjb strs_mapsz = sp[hdr.e64.e_shstrndx].sh_size + 340178479Sjb (sp[hdr.e64.e_shstrndx].sh_offset & ~_PAGEMASK); 341178479Sjb 342178479Sjb strs_map = mmap64(NULL, strs_mapsz, PROT_READ, MAP_PRIVATE, 343178479Sjb fd, sp[hdr.e64.e_shstrndx].sh_offset & _PAGEMASK); 344178479Sjb 345178548Sjb strs = (char *)strs_map + 346178479Sjb (sp[hdr.e64.e_shstrndx].sh_offset & ~_PAGEMASK); 347178479Sjb 348178479Sjb if (strs_map == MAP_FAILED) { 349178479Sjb free(sp); 350178479Sjb return (ctf_set_open_errno(errp, ECTF_MMAP)); 351178479Sjb } 352178479Sjb 353178479Sjb /* 354178479Sjb * Iterate over the section header array looking for the CTF 355178479Sjb * section and symbol table. The strtab is linked to symtab. 356178479Sjb */ 357178479Sjb for (i = 0; i < n; i++) { 358178479Sjb const GElf_Shdr *shp = &sp[i]; 359178479Sjb const GElf_Shdr *lhp = &sp[shp->sh_link]; 360178479Sjb 361178479Sjb if (shp->sh_link >= hdr.e64.e_shnum) 362178479Sjb continue; /* corrupt sh_link field */ 363178479Sjb 364178479Sjb if (shp->sh_name >= sp[hdr.e64.e_shstrndx].sh_size || 365178479Sjb lhp->sh_name >= sp[hdr.e64.e_shstrndx].sh_size) 366178479Sjb continue; /* corrupt sh_name field */ 367178479Sjb 368178479Sjb if (shp->sh_type == SHT_PROGBITS && 369178479Sjb strcmp(strs + shp->sh_name, _CTF_SECTION) == 0) { 370178479Sjb ctfsect.cts_name = strs + shp->sh_name; 371178479Sjb ctfsect.cts_type = shp->sh_type; 372178479Sjb ctfsect.cts_flags = shp->sh_flags; 373178479Sjb ctfsect.cts_size = shp->sh_size; 374178479Sjb ctfsect.cts_entsize = shp->sh_entsize; 375178479Sjb ctfsect.cts_offset = (off64_t)shp->sh_offset; 376178479Sjb 377178479Sjb } else if (shp->sh_type == SHT_SYMTAB) { 378178479Sjb symsect.cts_name = strs + shp->sh_name; 379178479Sjb symsect.cts_type = shp->sh_type; 380178479Sjb symsect.cts_flags = shp->sh_flags; 381178479Sjb symsect.cts_size = shp->sh_size; 382178479Sjb symsect.cts_entsize = shp->sh_entsize; 383178479Sjb symsect.cts_offset = (off64_t)shp->sh_offset; 384178479Sjb 385178479Sjb strsect.cts_name = strs + lhp->sh_name; 386178479Sjb strsect.cts_type = lhp->sh_type; 387178479Sjb strsect.cts_flags = lhp->sh_flags; 388178479Sjb strsect.cts_size = lhp->sh_size; 389178479Sjb strsect.cts_entsize = lhp->sh_entsize; 390178479Sjb strsect.cts_offset = (off64_t)lhp->sh_offset; 391178479Sjb } 392178479Sjb } 393178479Sjb 394178479Sjb free(sp); /* free section header array */ 395178479Sjb 396178479Sjb if (ctfsect.cts_type == SHT_NULL) { 397178479Sjb (void) munmap(strs_map, strs_mapsz); 398178479Sjb return (ctf_set_open_errno(errp, ECTF_NOCTFDATA)); 399178479Sjb } 400178479Sjb 401178479Sjb /* 402178479Sjb * Now mmap the CTF data, symtab, and strtab sections and 403178479Sjb * call ctf_bufopen() to do the rest of the work. 404178479Sjb */ 405178479Sjb if (ctf_sect_mmap(&ctfsect, fd) == MAP_FAILED) { 406178479Sjb (void) munmap(strs_map, strs_mapsz); 407178479Sjb return (ctf_set_open_errno(errp, ECTF_MMAP)); 408178479Sjb } 409178479Sjb 410178479Sjb if (symsect.cts_type != SHT_NULL && 411178479Sjb strsect.cts_type != SHT_NULL) { 412178479Sjb if (ctf_sect_mmap(&symsect, fd) == MAP_FAILED || 413178479Sjb ctf_sect_mmap(&strsect, fd) == MAP_FAILED) { 414178479Sjb (void) ctf_set_open_errno(errp, ECTF_MMAP); 415178479Sjb goto bad; /* unmap all and abort */ 416178479Sjb } 417178479Sjb fp = ctf_bufopen(&ctfsect, &symsect, &strsect, errp); 418178479Sjb } else 419178479Sjb fp = ctf_bufopen(&ctfsect, NULL, NULL, errp); 420178479Sjbbad: 421178479Sjb if (fp == NULL) { 422178479Sjb ctf_sect_munmap(&ctfsect); 423178479Sjb ctf_sect_munmap(&symsect); 424178479Sjb ctf_sect_munmap(&strsect); 425178479Sjb } else 426178479Sjb fp->ctf_flags |= LCTF_MMAP; 427178479Sjb 428178479Sjb (void) munmap(strs_map, strs_mapsz); 429178479Sjb return (fp); 430178479Sjb } 431178479Sjb 432178479Sjb return (ctf_set_open_errno(errp, ECTF_FMT)); 433178479Sjb} 434178479Sjb 435178479Sjb/* 436178479Sjb * Open the specified file and return a pointer to a CTF container. The file 437178479Sjb * can be either an ELF file or raw CTF file. This is just a convenient 438178479Sjb * wrapper around ctf_fdopen() for callers. 439178479Sjb */ 440178479Sjbctf_file_t * 441178479Sjbctf_open(const char *filename, int *errp) 442178479Sjb{ 443178479Sjb ctf_file_t *fp; 444178479Sjb int fd; 445178479Sjb 446178479Sjb if ((fd = open64(filename, O_RDONLY)) == -1) { 447178479Sjb if (errp != NULL) 448178479Sjb *errp = errno; 449178479Sjb return (NULL); 450178479Sjb } 451178479Sjb 452178479Sjb fp = ctf_fdopen(fd, errp); 453178479Sjb (void) close(fd); 454178479Sjb return (fp); 455178479Sjb} 456178479Sjb 457178479Sjb/* 458178479Sjb * Write the uncompressed CTF data stream to the specified file descriptor. 459178479Sjb * This is useful for saving the results of dynamic CTF containers. 460178479Sjb */ 461178479Sjbint 462178479Sjbctf_write(ctf_file_t *fp, int fd) 463178479Sjb{ 464178479Sjb const uchar_t *buf = fp->ctf_base; 465178479Sjb ssize_t resid = fp->ctf_size; 466178479Sjb ssize_t len; 467178479Sjb 468178479Sjb while (resid != 0) { 469178479Sjb if ((len = write(fd, buf, resid)) <= 0) 470178479Sjb return (ctf_set_errno(fp, errno)); 471178479Sjb resid -= len; 472178479Sjb buf += len; 473178479Sjb } 474178479Sjb 475178479Sjb return (0); 476178479Sjb} 477178479Sjb 478178479Sjb/* 479178479Sjb * Set the CTF library client version to the specified version. If version is 480178479Sjb * zero, we just return the default library version number. 481178479Sjb */ 482178479Sjbint 483178479Sjbctf_version(int version) 484178479Sjb{ 485178479Sjb if (version < 0) { 486178479Sjb errno = EINVAL; 487178479Sjb return (-1); 488178479Sjb } 489178479Sjb 490178479Sjb if (version > 0) { 491178479Sjb if (version > CTF_VERSION) { 492178479Sjb errno = ENOTSUP; 493178479Sjb return (-1); 494178479Sjb } 495178479Sjb ctf_dprintf("ctf_version: client using version %d\n", version); 496178479Sjb _libctf_version = version; 497178479Sjb } 498178479Sjb 499178479Sjb return (_libctf_version); 500178479Sjb} 501