16ff6d951SJohn Birrell /* 26ff6d951SJohn Birrell * CDDL HEADER START 36ff6d951SJohn Birrell * 46ff6d951SJohn Birrell * The contents of this file are subject to the terms of the 56ff6d951SJohn Birrell * Common Development and Distribution License (the "License"). 66ff6d951SJohn Birrell * You may not use this file except in compliance with the License. 76ff6d951SJohn Birrell * 86ff6d951SJohn Birrell * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 96ff6d951SJohn Birrell * or http://www.opensolaris.org/os/licensing. 106ff6d951SJohn Birrell * See the License for the specific language governing permissions 116ff6d951SJohn Birrell * and limitations under the License. 126ff6d951SJohn Birrell * 136ff6d951SJohn Birrell * When distributing Covered Code, include this CDDL HEADER in each 146ff6d951SJohn Birrell * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 156ff6d951SJohn Birrell * If applicable, add the following below this CDDL HEADER, with the 166ff6d951SJohn Birrell * fields enclosed by brackets "[]" replaced with your own identifying 176ff6d951SJohn Birrell * information: Portions Copyright [yyyy] [name of copyright owner] 186ff6d951SJohn Birrell * 196ff6d951SJohn Birrell * CDDL HEADER END 206ff6d951SJohn Birrell */ 216ff6d951SJohn Birrell 226ff6d951SJohn Birrell /* 232693feb4SJohn Birrell * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 246ff6d951SJohn Birrell * Use is subject to license terms. 256ff6d951SJohn Birrell */ 266ff6d951SJohn Birrell 276ff6d951SJohn Birrell #pragma ident "%Z%%M% %I% %E% SMI" 286ff6d951SJohn Birrell 296ff6d951SJohn Birrell #define ELF_TARGET_ALL 306ff6d951SJohn Birrell #include <elf.h> 316ff6d951SJohn Birrell 326ff6d951SJohn Birrell #include <sys/types.h> 332693feb4SJohn Birrell #if defined(sun) 346ff6d951SJohn Birrell #include <sys/sysmacros.h> 352693feb4SJohn Birrell #else 362693feb4SJohn Birrell #define P2ROUNDUP(x, align) (-(-(x) & -(align))) 372693feb4SJohn Birrell #endif 386ff6d951SJohn Birrell 396ff6d951SJohn Birrell #include <unistd.h> 406ff6d951SJohn Birrell #include <strings.h> 412693feb4SJohn Birrell #if defined(sun) 426ff6d951SJohn Birrell #include <alloca.h> 432693feb4SJohn Birrell #endif 446ff6d951SJohn Birrell #include <limits.h> 456ff6d951SJohn Birrell #include <stddef.h> 466ff6d951SJohn Birrell #include <stdlib.h> 476ff6d951SJohn Birrell #include <stdio.h> 486ff6d951SJohn Birrell #include <fcntl.h> 496ff6d951SJohn Birrell #include <errno.h> 502693feb4SJohn Birrell #if defined(sun) 516ff6d951SJohn Birrell #include <wait.h> 522693feb4SJohn Birrell #else 532693feb4SJohn Birrell #include <sys/wait.h> 542693feb4SJohn Birrell #endif 556ff6d951SJohn Birrell #include <assert.h> 566ff6d951SJohn Birrell #include <sys/ipc.h> 576ff6d951SJohn Birrell 586ff6d951SJohn Birrell #include <dt_impl.h> 596ff6d951SJohn Birrell #include <dt_provider.h> 606ff6d951SJohn Birrell #include <dt_program.h> 616ff6d951SJohn Birrell #include <dt_string.h> 626ff6d951SJohn Birrell 636ff6d951SJohn Birrell #define ESHDR_NULL 0 646ff6d951SJohn Birrell #define ESHDR_SHSTRTAB 1 656ff6d951SJohn Birrell #define ESHDR_DOF 2 666ff6d951SJohn Birrell #define ESHDR_STRTAB 3 676ff6d951SJohn Birrell #define ESHDR_SYMTAB 4 686ff6d951SJohn Birrell #define ESHDR_REL 5 696ff6d951SJohn Birrell #define ESHDR_NUM 6 706ff6d951SJohn Birrell 716ff6d951SJohn Birrell #define PWRITE_SCN(index, data) \ 726ff6d951SJohn Birrell (lseek64(fd, (off64_t)elf_file.shdr[(index)].sh_offset, SEEK_SET) != \ 736ff6d951SJohn Birrell (off64_t)elf_file.shdr[(index)].sh_offset || \ 746ff6d951SJohn Birrell dt_write(dtp, fd, (data), elf_file.shdr[(index)].sh_size) != \ 756ff6d951SJohn Birrell elf_file.shdr[(index)].sh_size) 766ff6d951SJohn Birrell 776ff6d951SJohn Birrell static const char DTRACE_SHSTRTAB32[] = "\0" 786ff6d951SJohn Birrell ".shstrtab\0" /* 1 */ 796ff6d951SJohn Birrell ".SUNW_dof\0" /* 11 */ 806ff6d951SJohn Birrell ".strtab\0" /* 21 */ 816ff6d951SJohn Birrell ".symtab\0" /* 29 */ 826ff6d951SJohn Birrell #ifdef __sparc 836ff6d951SJohn Birrell ".rela.SUNW_dof"; /* 37 */ 846ff6d951SJohn Birrell #else 856ff6d951SJohn Birrell ".rel.SUNW_dof"; /* 37 */ 866ff6d951SJohn Birrell #endif 876ff6d951SJohn Birrell 886ff6d951SJohn Birrell static const char DTRACE_SHSTRTAB64[] = "\0" 896ff6d951SJohn Birrell ".shstrtab\0" /* 1 */ 906ff6d951SJohn Birrell ".SUNW_dof\0" /* 11 */ 916ff6d951SJohn Birrell ".strtab\0" /* 21 */ 926ff6d951SJohn Birrell ".symtab\0" /* 29 */ 936ff6d951SJohn Birrell ".rela.SUNW_dof"; /* 37 */ 946ff6d951SJohn Birrell 956ff6d951SJohn Birrell static const char DOFSTR[] = "__SUNW_dof"; 966ff6d951SJohn Birrell static const char DOFLAZYSTR[] = "___SUNW_dof"; 976ff6d951SJohn Birrell 986ff6d951SJohn Birrell typedef struct dt_link_pair { 996ff6d951SJohn Birrell struct dt_link_pair *dlp_next; /* next pair in linked list */ 1006ff6d951SJohn Birrell void *dlp_str; /* buffer for string table */ 1016ff6d951SJohn Birrell void *dlp_sym; /* buffer for symbol table */ 1026ff6d951SJohn Birrell } dt_link_pair_t; 1036ff6d951SJohn Birrell 1046ff6d951SJohn Birrell typedef struct dof_elf32 { 1056ff6d951SJohn Birrell uint32_t de_nrel; /* relocation count */ 1066ff6d951SJohn Birrell #ifdef __sparc 1076ff6d951SJohn Birrell Elf32_Rela *de_rel; /* array of relocations for sparc */ 1086ff6d951SJohn Birrell #else 1096ff6d951SJohn Birrell Elf32_Rel *de_rel; /* array of relocations for x86 */ 1106ff6d951SJohn Birrell #endif 1116ff6d951SJohn Birrell uint32_t de_nsym; /* symbol count */ 1126ff6d951SJohn Birrell Elf32_Sym *de_sym; /* array of symbols */ 1136ff6d951SJohn Birrell uint32_t de_strlen; /* size of of string table */ 1146ff6d951SJohn Birrell char *de_strtab; /* string table */ 1156ff6d951SJohn Birrell uint32_t de_global; /* index of the first global symbol */ 1166ff6d951SJohn Birrell } dof_elf32_t; 1176ff6d951SJohn Birrell 1186ff6d951SJohn Birrell static int 1196ff6d951SJohn Birrell prepare_elf32(dtrace_hdl_t *dtp, const dof_hdr_t *dof, dof_elf32_t *dep) 1206ff6d951SJohn Birrell { 1216ff6d951SJohn Birrell dof_sec_t *dofs, *s; 1226ff6d951SJohn Birrell dof_relohdr_t *dofrh; 1236ff6d951SJohn Birrell dof_relodesc_t *dofr; 1246ff6d951SJohn Birrell char *strtab; 1256ff6d951SJohn Birrell int i, j, nrel; 1266ff6d951SJohn Birrell size_t strtabsz = 1; 1276ff6d951SJohn Birrell uint32_t count = 0; 1286ff6d951SJohn Birrell size_t base; 1296ff6d951SJohn Birrell Elf32_Sym *sym; 1306ff6d951SJohn Birrell #ifdef __sparc 1316ff6d951SJohn Birrell Elf32_Rela *rel; 1326ff6d951SJohn Birrell #else 1336ff6d951SJohn Birrell Elf32_Rel *rel; 1346ff6d951SJohn Birrell #endif 1356ff6d951SJohn Birrell 1366ff6d951SJohn Birrell /*LINTED*/ 1376ff6d951SJohn Birrell dofs = (dof_sec_t *)((char *)dof + dof->dofh_secoff); 1386ff6d951SJohn Birrell 1396ff6d951SJohn Birrell /* 1406ff6d951SJohn Birrell * First compute the size of the string table and the number of 1416ff6d951SJohn Birrell * relocations present in the DOF. 1426ff6d951SJohn Birrell */ 1436ff6d951SJohn Birrell for (i = 0; i < dof->dofh_secnum; i++) { 1446ff6d951SJohn Birrell if (dofs[i].dofs_type != DOF_SECT_URELHDR) 1456ff6d951SJohn Birrell continue; 1466ff6d951SJohn Birrell 1476ff6d951SJohn Birrell /*LINTED*/ 1486ff6d951SJohn Birrell dofrh = (dof_relohdr_t *)((char *)dof + dofs[i].dofs_offset); 1496ff6d951SJohn Birrell 1506ff6d951SJohn Birrell s = &dofs[dofrh->dofr_strtab]; 1516ff6d951SJohn Birrell strtab = (char *)dof + s->dofs_offset; 1526ff6d951SJohn Birrell assert(strtab[0] == '\0'); 1536ff6d951SJohn Birrell strtabsz += s->dofs_size - 1; 1546ff6d951SJohn Birrell 1556ff6d951SJohn Birrell s = &dofs[dofrh->dofr_relsec]; 1566ff6d951SJohn Birrell /*LINTED*/ 1576ff6d951SJohn Birrell dofr = (dof_relodesc_t *)((char *)dof + s->dofs_offset); 1586ff6d951SJohn Birrell count += s->dofs_size / s->dofs_entsize; 1596ff6d951SJohn Birrell } 1606ff6d951SJohn Birrell 1616ff6d951SJohn Birrell dep->de_strlen = strtabsz; 1626ff6d951SJohn Birrell dep->de_nrel = count; 1636ff6d951SJohn Birrell dep->de_nsym = count + 1; /* the first symbol is always null */ 1646ff6d951SJohn Birrell 1656ff6d951SJohn Birrell if (dtp->dt_lazyload) { 1666ff6d951SJohn Birrell dep->de_strlen += sizeof (DOFLAZYSTR); 1676ff6d951SJohn Birrell dep->de_nsym++; 1686ff6d951SJohn Birrell } else { 1696ff6d951SJohn Birrell dep->de_strlen += sizeof (DOFSTR); 1706ff6d951SJohn Birrell dep->de_nsym++; 1716ff6d951SJohn Birrell } 1726ff6d951SJohn Birrell 1736ff6d951SJohn Birrell if ((dep->de_rel = calloc(dep->de_nrel, 1746ff6d951SJohn Birrell sizeof (dep->de_rel[0]))) == NULL) { 1756ff6d951SJohn Birrell return (dt_set_errno(dtp, EDT_NOMEM)); 1766ff6d951SJohn Birrell } 1776ff6d951SJohn Birrell 1786ff6d951SJohn Birrell if ((dep->de_sym = calloc(dep->de_nsym, sizeof (Elf32_Sym))) == NULL) { 1796ff6d951SJohn Birrell free(dep->de_rel); 1806ff6d951SJohn Birrell return (dt_set_errno(dtp, EDT_NOMEM)); 1816ff6d951SJohn Birrell } 1826ff6d951SJohn Birrell 1836ff6d951SJohn Birrell if ((dep->de_strtab = calloc(dep->de_strlen, 1)) == NULL) { 1846ff6d951SJohn Birrell free(dep->de_rel); 1856ff6d951SJohn Birrell free(dep->de_sym); 1866ff6d951SJohn Birrell return (dt_set_errno(dtp, EDT_NOMEM)); 1876ff6d951SJohn Birrell } 1886ff6d951SJohn Birrell 1896ff6d951SJohn Birrell count = 0; 1906ff6d951SJohn Birrell strtabsz = 1; 1916ff6d951SJohn Birrell dep->de_strtab[0] = '\0'; 1926ff6d951SJohn Birrell rel = dep->de_rel; 1936ff6d951SJohn Birrell sym = dep->de_sym; 1946ff6d951SJohn Birrell dep->de_global = 1; 1956ff6d951SJohn Birrell 1966ff6d951SJohn Birrell /* 1976ff6d951SJohn Birrell * The first symbol table entry must be zeroed and is always ignored. 1986ff6d951SJohn Birrell */ 1996ff6d951SJohn Birrell bzero(sym, sizeof (Elf32_Sym)); 2006ff6d951SJohn Birrell sym++; 2016ff6d951SJohn Birrell 2026ff6d951SJohn Birrell /* 2036ff6d951SJohn Birrell * Take a second pass through the DOF sections filling in the 2046ff6d951SJohn Birrell * memory we allocated. 2056ff6d951SJohn Birrell */ 2066ff6d951SJohn Birrell for (i = 0; i < dof->dofh_secnum; i++) { 2076ff6d951SJohn Birrell if (dofs[i].dofs_type != DOF_SECT_URELHDR) 2086ff6d951SJohn Birrell continue; 2096ff6d951SJohn Birrell 2106ff6d951SJohn Birrell /*LINTED*/ 2116ff6d951SJohn Birrell dofrh = (dof_relohdr_t *)((char *)dof + dofs[i].dofs_offset); 2126ff6d951SJohn Birrell 2136ff6d951SJohn Birrell s = &dofs[dofrh->dofr_strtab]; 2146ff6d951SJohn Birrell strtab = (char *)dof + s->dofs_offset; 2156ff6d951SJohn Birrell bcopy(strtab + 1, dep->de_strtab + strtabsz, s->dofs_size); 2166ff6d951SJohn Birrell base = strtabsz; 2176ff6d951SJohn Birrell strtabsz += s->dofs_size - 1; 2186ff6d951SJohn Birrell 2196ff6d951SJohn Birrell s = &dofs[dofrh->dofr_relsec]; 2206ff6d951SJohn Birrell /*LINTED*/ 2216ff6d951SJohn Birrell dofr = (dof_relodesc_t *)((char *)dof + s->dofs_offset); 2226ff6d951SJohn Birrell nrel = s->dofs_size / s->dofs_entsize; 2236ff6d951SJohn Birrell 2246ff6d951SJohn Birrell s = &dofs[dofrh->dofr_tgtsec]; 2256ff6d951SJohn Birrell 2266ff6d951SJohn Birrell for (j = 0; j < nrel; j++) { 2272693feb4SJohn Birrell #if defined(__arm__) 2282693feb4SJohn Birrell /* XXX */ 2292693feb4SJohn Birrell printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__); 2302693feb4SJohn Birrell #elif defined(__ia64__) 2312693feb4SJohn Birrell /* XXX */ 2322693feb4SJohn Birrell printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__); 2332693feb4SJohn Birrell #elif defined(__i386) || defined(__amd64) 2346ff6d951SJohn Birrell rel->r_offset = s->dofs_offset + 2356ff6d951SJohn Birrell dofr[j].dofr_offset; 2366ff6d951SJohn Birrell rel->r_info = ELF32_R_INFO(count + dep->de_global, 2376ff6d951SJohn Birrell R_386_32); 2382693feb4SJohn Birrell #elif defined(__mips__) 2392693feb4SJohn Birrell /* XXX */ 2402693feb4SJohn Birrell printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__); 2412693feb4SJohn Birrell #elif defined(__powerpc__) 2422693feb4SJohn Birrell /* XXX */ 2432693feb4SJohn Birrell printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__); 2446ff6d951SJohn Birrell #elif defined(__sparc) 2456ff6d951SJohn Birrell /* 2466ff6d951SJohn Birrell * Add 4 bytes to hit the low half of this 64-bit 2476ff6d951SJohn Birrell * big-endian address. 2486ff6d951SJohn Birrell */ 2496ff6d951SJohn Birrell rel->r_offset = s->dofs_offset + 2506ff6d951SJohn Birrell dofr[j].dofr_offset + 4; 2516ff6d951SJohn Birrell rel->r_info = ELF32_R_INFO(count + dep->de_global, 2526ff6d951SJohn Birrell R_SPARC_32); 2536ff6d951SJohn Birrell #else 2546ff6d951SJohn Birrell #error unknown ISA 2556ff6d951SJohn Birrell #endif 2566ff6d951SJohn Birrell 2576ff6d951SJohn Birrell sym->st_name = base + dofr[j].dofr_name - 1; 2586ff6d951SJohn Birrell sym->st_value = 0; 2596ff6d951SJohn Birrell sym->st_size = 0; 2606ff6d951SJohn Birrell sym->st_info = ELF32_ST_INFO(STB_GLOBAL, STT_FUNC); 2616ff6d951SJohn Birrell sym->st_other = 0; 2626ff6d951SJohn Birrell sym->st_shndx = SHN_UNDEF; 2636ff6d951SJohn Birrell 2646ff6d951SJohn Birrell rel++; 2656ff6d951SJohn Birrell sym++; 2666ff6d951SJohn Birrell count++; 2676ff6d951SJohn Birrell } 2686ff6d951SJohn Birrell } 2696ff6d951SJohn Birrell 2706ff6d951SJohn Birrell /* 2716ff6d951SJohn Birrell * Add a symbol for the DOF itself. We use a different symbol for 2726ff6d951SJohn Birrell * lazily and actively loaded DOF to make them easy to distinguish. 2736ff6d951SJohn Birrell */ 2746ff6d951SJohn Birrell sym->st_name = strtabsz; 2756ff6d951SJohn Birrell sym->st_value = 0; 2766ff6d951SJohn Birrell sym->st_size = dof->dofh_filesz; 2776ff6d951SJohn Birrell sym->st_info = ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT); 2786ff6d951SJohn Birrell sym->st_other = 0; 2796ff6d951SJohn Birrell sym->st_shndx = ESHDR_DOF; 2806ff6d951SJohn Birrell sym++; 2816ff6d951SJohn Birrell 2826ff6d951SJohn Birrell if (dtp->dt_lazyload) { 2836ff6d951SJohn Birrell bcopy(DOFLAZYSTR, dep->de_strtab + strtabsz, 2846ff6d951SJohn Birrell sizeof (DOFLAZYSTR)); 2856ff6d951SJohn Birrell strtabsz += sizeof (DOFLAZYSTR); 2866ff6d951SJohn Birrell } else { 2876ff6d951SJohn Birrell bcopy(DOFSTR, dep->de_strtab + strtabsz, sizeof (DOFSTR)); 2886ff6d951SJohn Birrell strtabsz += sizeof (DOFSTR); 2896ff6d951SJohn Birrell } 2906ff6d951SJohn Birrell 2916ff6d951SJohn Birrell assert(count == dep->de_nrel); 2926ff6d951SJohn Birrell assert(strtabsz == dep->de_strlen); 2936ff6d951SJohn Birrell 2946ff6d951SJohn Birrell return (0); 2956ff6d951SJohn Birrell } 2966ff6d951SJohn Birrell 2976ff6d951SJohn Birrell 2986ff6d951SJohn Birrell typedef struct dof_elf64 { 2996ff6d951SJohn Birrell uint32_t de_nrel; 3006ff6d951SJohn Birrell Elf64_Rela *de_rel; 3016ff6d951SJohn Birrell uint32_t de_nsym; 3026ff6d951SJohn Birrell Elf64_Sym *de_sym; 3036ff6d951SJohn Birrell 3046ff6d951SJohn Birrell uint32_t de_strlen; 3056ff6d951SJohn Birrell char *de_strtab; 3066ff6d951SJohn Birrell 3076ff6d951SJohn Birrell uint32_t de_global; 3086ff6d951SJohn Birrell } dof_elf64_t; 3096ff6d951SJohn Birrell 3106ff6d951SJohn Birrell static int 3116ff6d951SJohn Birrell prepare_elf64(dtrace_hdl_t *dtp, const dof_hdr_t *dof, dof_elf64_t *dep) 3126ff6d951SJohn Birrell { 3136ff6d951SJohn Birrell dof_sec_t *dofs, *s; 3146ff6d951SJohn Birrell dof_relohdr_t *dofrh; 3156ff6d951SJohn Birrell dof_relodesc_t *dofr; 3166ff6d951SJohn Birrell char *strtab; 3176ff6d951SJohn Birrell int i, j, nrel; 3186ff6d951SJohn Birrell size_t strtabsz = 1; 3196ff6d951SJohn Birrell uint32_t count = 0; 3206ff6d951SJohn Birrell size_t base; 3216ff6d951SJohn Birrell Elf64_Sym *sym; 3226ff6d951SJohn Birrell Elf64_Rela *rel; 3236ff6d951SJohn Birrell 3246ff6d951SJohn Birrell /*LINTED*/ 3256ff6d951SJohn Birrell dofs = (dof_sec_t *)((char *)dof + dof->dofh_secoff); 3266ff6d951SJohn Birrell 3276ff6d951SJohn Birrell /* 3286ff6d951SJohn Birrell * First compute the size of the string table and the number of 3296ff6d951SJohn Birrell * relocations present in the DOF. 3306ff6d951SJohn Birrell */ 3316ff6d951SJohn Birrell for (i = 0; i < dof->dofh_secnum; i++) { 3326ff6d951SJohn Birrell if (dofs[i].dofs_type != DOF_SECT_URELHDR) 3336ff6d951SJohn Birrell continue; 3346ff6d951SJohn Birrell 3356ff6d951SJohn Birrell /*LINTED*/ 3366ff6d951SJohn Birrell dofrh = (dof_relohdr_t *)((char *)dof + dofs[i].dofs_offset); 3376ff6d951SJohn Birrell 3386ff6d951SJohn Birrell s = &dofs[dofrh->dofr_strtab]; 3396ff6d951SJohn Birrell strtab = (char *)dof + s->dofs_offset; 3406ff6d951SJohn Birrell assert(strtab[0] == '\0'); 3416ff6d951SJohn Birrell strtabsz += s->dofs_size - 1; 3426ff6d951SJohn Birrell 3436ff6d951SJohn Birrell s = &dofs[dofrh->dofr_relsec]; 3446ff6d951SJohn Birrell /*LINTED*/ 3456ff6d951SJohn Birrell dofr = (dof_relodesc_t *)((char *)dof + s->dofs_offset); 3466ff6d951SJohn Birrell count += s->dofs_size / s->dofs_entsize; 3476ff6d951SJohn Birrell } 3486ff6d951SJohn Birrell 3496ff6d951SJohn Birrell dep->de_strlen = strtabsz; 3506ff6d951SJohn Birrell dep->de_nrel = count; 3516ff6d951SJohn Birrell dep->de_nsym = count + 1; /* the first symbol is always null */ 3526ff6d951SJohn Birrell 3536ff6d951SJohn Birrell if (dtp->dt_lazyload) { 3546ff6d951SJohn Birrell dep->de_strlen += sizeof (DOFLAZYSTR); 3556ff6d951SJohn Birrell dep->de_nsym++; 3566ff6d951SJohn Birrell } else { 3576ff6d951SJohn Birrell dep->de_strlen += sizeof (DOFSTR); 3586ff6d951SJohn Birrell dep->de_nsym++; 3596ff6d951SJohn Birrell } 3606ff6d951SJohn Birrell 3616ff6d951SJohn Birrell if ((dep->de_rel = calloc(dep->de_nrel, 3626ff6d951SJohn Birrell sizeof (dep->de_rel[0]))) == NULL) { 3636ff6d951SJohn Birrell return (dt_set_errno(dtp, EDT_NOMEM)); 3646ff6d951SJohn Birrell } 3656ff6d951SJohn Birrell 3666ff6d951SJohn Birrell if ((dep->de_sym = calloc(dep->de_nsym, sizeof (Elf64_Sym))) == NULL) { 3676ff6d951SJohn Birrell free(dep->de_rel); 3686ff6d951SJohn Birrell return (dt_set_errno(dtp, EDT_NOMEM)); 3696ff6d951SJohn Birrell } 3706ff6d951SJohn Birrell 3716ff6d951SJohn Birrell if ((dep->de_strtab = calloc(dep->de_strlen, 1)) == NULL) { 3726ff6d951SJohn Birrell free(dep->de_rel); 3736ff6d951SJohn Birrell free(dep->de_sym); 3746ff6d951SJohn Birrell return (dt_set_errno(dtp, EDT_NOMEM)); 3756ff6d951SJohn Birrell } 3766ff6d951SJohn Birrell 3776ff6d951SJohn Birrell count = 0; 3786ff6d951SJohn Birrell strtabsz = 1; 3796ff6d951SJohn Birrell dep->de_strtab[0] = '\0'; 3806ff6d951SJohn Birrell rel = dep->de_rel; 3816ff6d951SJohn Birrell sym = dep->de_sym; 3826ff6d951SJohn Birrell dep->de_global = 1; 3836ff6d951SJohn Birrell 3846ff6d951SJohn Birrell /* 3856ff6d951SJohn Birrell * The first symbol table entry must be zeroed and is always ignored. 3866ff6d951SJohn Birrell */ 3876ff6d951SJohn Birrell bzero(sym, sizeof (Elf64_Sym)); 3886ff6d951SJohn Birrell sym++; 3896ff6d951SJohn Birrell 3906ff6d951SJohn Birrell /* 3916ff6d951SJohn Birrell * Take a second pass through the DOF sections filling in the 3926ff6d951SJohn Birrell * memory we allocated. 3936ff6d951SJohn Birrell */ 3946ff6d951SJohn Birrell for (i = 0; i < dof->dofh_secnum; i++) { 3956ff6d951SJohn Birrell if (dofs[i].dofs_type != DOF_SECT_URELHDR) 3966ff6d951SJohn Birrell continue; 3976ff6d951SJohn Birrell 3986ff6d951SJohn Birrell /*LINTED*/ 3996ff6d951SJohn Birrell dofrh = (dof_relohdr_t *)((char *)dof + dofs[i].dofs_offset); 4006ff6d951SJohn Birrell 4016ff6d951SJohn Birrell s = &dofs[dofrh->dofr_strtab]; 4026ff6d951SJohn Birrell strtab = (char *)dof + s->dofs_offset; 4036ff6d951SJohn Birrell bcopy(strtab + 1, dep->de_strtab + strtabsz, s->dofs_size); 4046ff6d951SJohn Birrell base = strtabsz; 4056ff6d951SJohn Birrell strtabsz += s->dofs_size - 1; 4066ff6d951SJohn Birrell 4076ff6d951SJohn Birrell s = &dofs[dofrh->dofr_relsec]; 4086ff6d951SJohn Birrell /*LINTED*/ 4096ff6d951SJohn Birrell dofr = (dof_relodesc_t *)((char *)dof + s->dofs_offset); 4106ff6d951SJohn Birrell nrel = s->dofs_size / s->dofs_entsize; 4116ff6d951SJohn Birrell 4126ff6d951SJohn Birrell s = &dofs[dofrh->dofr_tgtsec]; 4136ff6d951SJohn Birrell 4146ff6d951SJohn Birrell for (j = 0; j < nrel; j++) { 4152693feb4SJohn Birrell printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__); 4162693feb4SJohn Birrell #ifdef DOODAD 4172693feb4SJohn Birrell #if defined(__arm__) 4182693feb4SJohn Birrell /* XXX */ 4192693feb4SJohn Birrell #elif defined(__ia64__) 4202693feb4SJohn Birrell /* XXX */ 4212693feb4SJohn Birrell #elif defined(__mips__) 4222693feb4SJohn Birrell /* XXX */ 4232693feb4SJohn Birrell #elif defined(__powerpc__) 4242693feb4SJohn Birrell /* XXX */ 4252693feb4SJohn Birrell #elif defined(__i386) || defined(__amd64) 4266ff6d951SJohn Birrell rel->r_offset = s->dofs_offset + 4276ff6d951SJohn Birrell dofr[j].dofr_offset; 4286ff6d951SJohn Birrell rel->r_info = ELF64_R_INFO(count + dep->de_global, 4296ff6d951SJohn Birrell R_AMD64_64); 4306ff6d951SJohn Birrell #elif defined(__sparc) 4316ff6d951SJohn Birrell rel->r_offset = s->dofs_offset + 4326ff6d951SJohn Birrell dofr[j].dofr_offset; 4336ff6d951SJohn Birrell rel->r_info = ELF64_R_INFO(count + dep->de_global, 4346ff6d951SJohn Birrell R_SPARC_64); 4356ff6d951SJohn Birrell #else 4366ff6d951SJohn Birrell #error unknown ISA 4376ff6d951SJohn Birrell #endif 4382693feb4SJohn Birrell #endif 4396ff6d951SJohn Birrell 4406ff6d951SJohn Birrell sym->st_name = base + dofr[j].dofr_name - 1; 4416ff6d951SJohn Birrell sym->st_value = 0; 4426ff6d951SJohn Birrell sym->st_size = 0; 4436ff6d951SJohn Birrell sym->st_info = GELF_ST_INFO(STB_GLOBAL, STT_FUNC); 4446ff6d951SJohn Birrell sym->st_other = 0; 4456ff6d951SJohn Birrell sym->st_shndx = SHN_UNDEF; 4466ff6d951SJohn Birrell 4476ff6d951SJohn Birrell rel++; 4486ff6d951SJohn Birrell sym++; 4496ff6d951SJohn Birrell count++; 4506ff6d951SJohn Birrell } 4516ff6d951SJohn Birrell } 4526ff6d951SJohn Birrell 4536ff6d951SJohn Birrell /* 4546ff6d951SJohn Birrell * Add a symbol for the DOF itself. We use a different symbol for 4556ff6d951SJohn Birrell * lazily and actively loaded DOF to make them easy to distinguish. 4566ff6d951SJohn Birrell */ 4576ff6d951SJohn Birrell sym->st_name = strtabsz; 4586ff6d951SJohn Birrell sym->st_value = 0; 4596ff6d951SJohn Birrell sym->st_size = dof->dofh_filesz; 4606ff6d951SJohn Birrell sym->st_info = GELF_ST_INFO(STB_GLOBAL, STT_OBJECT); 4616ff6d951SJohn Birrell sym->st_other = 0; 4626ff6d951SJohn Birrell sym->st_shndx = ESHDR_DOF; 4636ff6d951SJohn Birrell sym++; 4646ff6d951SJohn Birrell 4656ff6d951SJohn Birrell if (dtp->dt_lazyload) { 4666ff6d951SJohn Birrell bcopy(DOFLAZYSTR, dep->de_strtab + strtabsz, 4676ff6d951SJohn Birrell sizeof (DOFLAZYSTR)); 4686ff6d951SJohn Birrell strtabsz += sizeof (DOFLAZYSTR); 4696ff6d951SJohn Birrell } else { 4706ff6d951SJohn Birrell bcopy(DOFSTR, dep->de_strtab + strtabsz, sizeof (DOFSTR)); 4716ff6d951SJohn Birrell strtabsz += sizeof (DOFSTR); 4726ff6d951SJohn Birrell } 4736ff6d951SJohn Birrell 4746ff6d951SJohn Birrell assert(count == dep->de_nrel); 4756ff6d951SJohn Birrell assert(strtabsz == dep->de_strlen); 4766ff6d951SJohn Birrell 4776ff6d951SJohn Birrell return (0); 4786ff6d951SJohn Birrell } 4796ff6d951SJohn Birrell 4806ff6d951SJohn Birrell /* 4816ff6d951SJohn Birrell * Write out an ELF32 file prologue consisting of a header, section headers, 4826ff6d951SJohn Birrell * and a section header string table. The DOF data will follow this prologue 4836ff6d951SJohn Birrell * and complete the contents of the given ELF file. 4846ff6d951SJohn Birrell */ 4856ff6d951SJohn Birrell static int 4866ff6d951SJohn Birrell dump_elf32(dtrace_hdl_t *dtp, const dof_hdr_t *dof, int fd) 4876ff6d951SJohn Birrell { 4886ff6d951SJohn Birrell struct { 4896ff6d951SJohn Birrell Elf32_Ehdr ehdr; 4906ff6d951SJohn Birrell Elf32_Shdr shdr[ESHDR_NUM]; 4916ff6d951SJohn Birrell } elf_file; 4926ff6d951SJohn Birrell 4936ff6d951SJohn Birrell Elf32_Shdr *shp; 4946ff6d951SJohn Birrell Elf32_Off off; 4956ff6d951SJohn Birrell dof_elf32_t de; 4966ff6d951SJohn Birrell int ret = 0; 4976ff6d951SJohn Birrell uint_t nshdr; 4986ff6d951SJohn Birrell 4996ff6d951SJohn Birrell if (prepare_elf32(dtp, dof, &de) != 0) 5006ff6d951SJohn Birrell return (-1); /* errno is set for us */ 5016ff6d951SJohn Birrell 5026ff6d951SJohn Birrell /* 5036ff6d951SJohn Birrell * If there are no relocations, we only need enough sections for 5046ff6d951SJohn Birrell * the shstrtab and the DOF. 5056ff6d951SJohn Birrell */ 5066ff6d951SJohn Birrell nshdr = de.de_nrel == 0 ? ESHDR_SYMTAB + 1 : ESHDR_NUM; 5076ff6d951SJohn Birrell 5086ff6d951SJohn Birrell bzero(&elf_file, sizeof (elf_file)); 5096ff6d951SJohn Birrell 5106ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_MAG0] = ELFMAG0; 5116ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_MAG1] = ELFMAG1; 5126ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_MAG2] = ELFMAG2; 5136ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_MAG3] = ELFMAG3; 5146ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_VERSION] = EV_CURRENT; 5156ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_CLASS] = ELFCLASS32; 5162693feb4SJohn Birrell #if BYTE_ORDER == _BIG_ENDIAN 5176ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_DATA] = ELFDATA2MSB; 5182693feb4SJohn Birrell #else 5196ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_DATA] = ELFDATA2LSB; 5206ff6d951SJohn Birrell #endif 5212693feb4SJohn Birrell #if defined(__FreeBSD__) 5222693feb4SJohn Birrell elf_file.ehdr.e_ident[EI_OSABI] = ELFOSABI_FREEBSD; 5232693feb4SJohn Birrell #endif 5246ff6d951SJohn Birrell elf_file.ehdr.e_type = ET_REL; 5252693feb4SJohn Birrell #if defined(__arm__) 5262693feb4SJohn Birrell elf_file.ehdr.e_machine = EM_ARM; 5272693feb4SJohn Birrell #elif defined(__ia64__) 5282693feb4SJohn Birrell elf_file.ehdr.e_machine = EM_IA_64; 5292693feb4SJohn Birrell #elif defined(__mips__) 5302693feb4SJohn Birrell elf_file.ehdr.e_machine = EM_MIPS; 5312693feb4SJohn Birrell #elif defined(__powerpc__) 5322693feb4SJohn Birrell elf_file.ehdr.e_machine = EM_PPC; 5332693feb4SJohn Birrell #elif defined(__sparc) 5346ff6d951SJohn Birrell elf_file.ehdr.e_machine = EM_SPARC; 5356ff6d951SJohn Birrell #elif defined(__i386) || defined(__amd64) 5366ff6d951SJohn Birrell elf_file.ehdr.e_machine = EM_386; 5376ff6d951SJohn Birrell #endif 5386ff6d951SJohn Birrell elf_file.ehdr.e_version = EV_CURRENT; 5396ff6d951SJohn Birrell elf_file.ehdr.e_shoff = sizeof (Elf32_Ehdr); 5406ff6d951SJohn Birrell elf_file.ehdr.e_ehsize = sizeof (Elf32_Ehdr); 5416ff6d951SJohn Birrell elf_file.ehdr.e_phentsize = sizeof (Elf32_Phdr); 5426ff6d951SJohn Birrell elf_file.ehdr.e_shentsize = sizeof (Elf32_Shdr); 5436ff6d951SJohn Birrell elf_file.ehdr.e_shnum = nshdr; 5446ff6d951SJohn Birrell elf_file.ehdr.e_shstrndx = ESHDR_SHSTRTAB; 5456ff6d951SJohn Birrell off = sizeof (elf_file) + nshdr * sizeof (Elf32_Shdr); 5466ff6d951SJohn Birrell 5476ff6d951SJohn Birrell shp = &elf_file.shdr[ESHDR_SHSTRTAB]; 5486ff6d951SJohn Birrell shp->sh_name = 1; /* DTRACE_SHSTRTAB32[1] = ".shstrtab" */ 5496ff6d951SJohn Birrell shp->sh_type = SHT_STRTAB; 5506ff6d951SJohn Birrell shp->sh_offset = off; 5516ff6d951SJohn Birrell shp->sh_size = sizeof (DTRACE_SHSTRTAB32); 5526ff6d951SJohn Birrell shp->sh_addralign = sizeof (char); 5536ff6d951SJohn Birrell off = P2ROUNDUP(shp->sh_offset + shp->sh_size, 8); 5546ff6d951SJohn Birrell 5556ff6d951SJohn Birrell shp = &elf_file.shdr[ESHDR_DOF]; 5566ff6d951SJohn Birrell shp->sh_name = 11; /* DTRACE_SHSTRTAB32[11] = ".SUNW_dof" */ 5576ff6d951SJohn Birrell shp->sh_flags = SHF_ALLOC; 5586ff6d951SJohn Birrell shp->sh_type = SHT_SUNW_dof; 5596ff6d951SJohn Birrell shp->sh_offset = off; 5606ff6d951SJohn Birrell shp->sh_size = dof->dofh_filesz; 5616ff6d951SJohn Birrell shp->sh_addralign = 8; 5626ff6d951SJohn Birrell off = shp->sh_offset + shp->sh_size; 5636ff6d951SJohn Birrell 5646ff6d951SJohn Birrell shp = &elf_file.shdr[ESHDR_STRTAB]; 5656ff6d951SJohn Birrell shp->sh_name = 21; /* DTRACE_SHSTRTAB32[21] = ".strtab" */ 5666ff6d951SJohn Birrell shp->sh_flags = SHF_ALLOC; 5676ff6d951SJohn Birrell shp->sh_type = SHT_STRTAB; 5686ff6d951SJohn Birrell shp->sh_offset = off; 5696ff6d951SJohn Birrell shp->sh_size = de.de_strlen; 5706ff6d951SJohn Birrell shp->sh_addralign = sizeof (char); 5716ff6d951SJohn Birrell off = P2ROUNDUP(shp->sh_offset + shp->sh_size, 4); 5726ff6d951SJohn Birrell 5736ff6d951SJohn Birrell shp = &elf_file.shdr[ESHDR_SYMTAB]; 5746ff6d951SJohn Birrell shp->sh_name = 29; /* DTRACE_SHSTRTAB32[29] = ".symtab" */ 5756ff6d951SJohn Birrell shp->sh_flags = SHF_ALLOC; 5766ff6d951SJohn Birrell shp->sh_type = SHT_SYMTAB; 5776ff6d951SJohn Birrell shp->sh_entsize = sizeof (Elf32_Sym); 5786ff6d951SJohn Birrell shp->sh_link = ESHDR_STRTAB; 5796ff6d951SJohn Birrell shp->sh_offset = off; 5806ff6d951SJohn Birrell shp->sh_info = de.de_global; 5816ff6d951SJohn Birrell shp->sh_size = de.de_nsym * sizeof (Elf32_Sym); 5826ff6d951SJohn Birrell shp->sh_addralign = 4; 5836ff6d951SJohn Birrell off = P2ROUNDUP(shp->sh_offset + shp->sh_size, 4); 5846ff6d951SJohn Birrell 5856ff6d951SJohn Birrell if (de.de_nrel == 0) { 5866ff6d951SJohn Birrell if (dt_write(dtp, fd, &elf_file, 5876ff6d951SJohn Birrell sizeof (elf_file)) != sizeof (elf_file) || 5886ff6d951SJohn Birrell PWRITE_SCN(ESHDR_SHSTRTAB, DTRACE_SHSTRTAB32) || 5896ff6d951SJohn Birrell PWRITE_SCN(ESHDR_STRTAB, de.de_strtab) || 5906ff6d951SJohn Birrell PWRITE_SCN(ESHDR_SYMTAB, de.de_sym) || 5916ff6d951SJohn Birrell PWRITE_SCN(ESHDR_DOF, dof)) { 5926ff6d951SJohn Birrell ret = dt_set_errno(dtp, errno); 5936ff6d951SJohn Birrell } 5946ff6d951SJohn Birrell } else { 5956ff6d951SJohn Birrell shp = &elf_file.shdr[ESHDR_REL]; 5966ff6d951SJohn Birrell shp->sh_name = 37; /* DTRACE_SHSTRTAB32[37] = ".rel.SUNW_dof" */ 5976ff6d951SJohn Birrell shp->sh_flags = SHF_ALLOC; 5986ff6d951SJohn Birrell #ifdef __sparc 5996ff6d951SJohn Birrell shp->sh_type = SHT_RELA; 6006ff6d951SJohn Birrell #else 6016ff6d951SJohn Birrell shp->sh_type = SHT_REL; 6026ff6d951SJohn Birrell #endif 6036ff6d951SJohn Birrell shp->sh_entsize = sizeof (de.de_rel[0]); 6046ff6d951SJohn Birrell shp->sh_link = ESHDR_SYMTAB; 6056ff6d951SJohn Birrell shp->sh_info = ESHDR_DOF; 6066ff6d951SJohn Birrell shp->sh_offset = off; 6076ff6d951SJohn Birrell shp->sh_size = de.de_nrel * sizeof (de.de_rel[0]); 6086ff6d951SJohn Birrell shp->sh_addralign = 4; 6096ff6d951SJohn Birrell 6106ff6d951SJohn Birrell if (dt_write(dtp, fd, &elf_file, 6116ff6d951SJohn Birrell sizeof (elf_file)) != sizeof (elf_file) || 6126ff6d951SJohn Birrell PWRITE_SCN(ESHDR_SHSTRTAB, DTRACE_SHSTRTAB32) || 6136ff6d951SJohn Birrell PWRITE_SCN(ESHDR_STRTAB, de.de_strtab) || 6146ff6d951SJohn Birrell PWRITE_SCN(ESHDR_SYMTAB, de.de_sym) || 6156ff6d951SJohn Birrell PWRITE_SCN(ESHDR_REL, de.de_rel) || 6166ff6d951SJohn Birrell PWRITE_SCN(ESHDR_DOF, dof)) { 6176ff6d951SJohn Birrell ret = dt_set_errno(dtp, errno); 6186ff6d951SJohn Birrell } 6196ff6d951SJohn Birrell } 6206ff6d951SJohn Birrell 6216ff6d951SJohn Birrell free(de.de_strtab); 6226ff6d951SJohn Birrell free(de.de_sym); 6236ff6d951SJohn Birrell free(de.de_rel); 6246ff6d951SJohn Birrell 6256ff6d951SJohn Birrell return (ret); 6266ff6d951SJohn Birrell } 6276ff6d951SJohn Birrell 6286ff6d951SJohn Birrell /* 6296ff6d951SJohn Birrell * Write out an ELF64 file prologue consisting of a header, section headers, 6306ff6d951SJohn Birrell * and a section header string table. The DOF data will follow this prologue 6316ff6d951SJohn Birrell * and complete the contents of the given ELF file. 6326ff6d951SJohn Birrell */ 6336ff6d951SJohn Birrell static int 6346ff6d951SJohn Birrell dump_elf64(dtrace_hdl_t *dtp, const dof_hdr_t *dof, int fd) 6356ff6d951SJohn Birrell { 6366ff6d951SJohn Birrell struct { 6376ff6d951SJohn Birrell Elf64_Ehdr ehdr; 6386ff6d951SJohn Birrell Elf64_Shdr shdr[ESHDR_NUM]; 6396ff6d951SJohn Birrell } elf_file; 6406ff6d951SJohn Birrell 6416ff6d951SJohn Birrell Elf64_Shdr *shp; 6426ff6d951SJohn Birrell Elf64_Off off; 6436ff6d951SJohn Birrell dof_elf64_t de; 6446ff6d951SJohn Birrell int ret = 0; 6456ff6d951SJohn Birrell uint_t nshdr; 6466ff6d951SJohn Birrell 6476ff6d951SJohn Birrell if (prepare_elf64(dtp, dof, &de) != 0) 6486ff6d951SJohn Birrell return (-1); /* errno is set for us */ 6496ff6d951SJohn Birrell 6506ff6d951SJohn Birrell /* 6516ff6d951SJohn Birrell * If there are no relocations, we only need enough sections for 6526ff6d951SJohn Birrell * the shstrtab and the DOF. 6536ff6d951SJohn Birrell */ 6546ff6d951SJohn Birrell nshdr = de.de_nrel == 0 ? ESHDR_SYMTAB + 1 : ESHDR_NUM; 6556ff6d951SJohn Birrell 6566ff6d951SJohn Birrell bzero(&elf_file, sizeof (elf_file)); 6576ff6d951SJohn Birrell 6586ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_MAG0] = ELFMAG0; 6596ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_MAG1] = ELFMAG1; 6606ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_MAG2] = ELFMAG2; 6616ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_MAG3] = ELFMAG3; 6626ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_VERSION] = EV_CURRENT; 6636ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_CLASS] = ELFCLASS64; 6642693feb4SJohn Birrell #if BYTE_ORDER == _BIG_ENDIAN 6656ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_DATA] = ELFDATA2MSB; 6662693feb4SJohn Birrell #else 6676ff6d951SJohn Birrell elf_file.ehdr.e_ident[EI_DATA] = ELFDATA2LSB; 6686ff6d951SJohn Birrell #endif 6692693feb4SJohn Birrell #if defined(__FreeBSD__) 6702693feb4SJohn Birrell elf_file.ehdr.e_ident[EI_OSABI] = ELFOSABI_FREEBSD; 6712693feb4SJohn Birrell #endif 6726ff6d951SJohn Birrell elf_file.ehdr.e_type = ET_REL; 6732693feb4SJohn Birrell #if defined(__arm__) 6742693feb4SJohn Birrell elf_file.ehdr.e_machine = EM_ARM; 6752693feb4SJohn Birrell #elif defined(__ia64__) 6762693feb4SJohn Birrell elf_file.ehdr.e_machine = EM_IA_64; 6772693feb4SJohn Birrell #elif defined(__mips__) 6782693feb4SJohn Birrell elf_file.ehdr.e_machine = EM_MIPS; 6792693feb4SJohn Birrell #elif defined(__powerpc__) 6802693feb4SJohn Birrell elf_file.ehdr.e_machine = EM_PPC; 6812693feb4SJohn Birrell #elif defined(__sparc) 6826ff6d951SJohn Birrell elf_file.ehdr.e_machine = EM_SPARCV9; 6836ff6d951SJohn Birrell #elif defined(__i386) || defined(__amd64) 6846ff6d951SJohn Birrell elf_file.ehdr.e_machine = EM_AMD64; 6856ff6d951SJohn Birrell #endif 6866ff6d951SJohn Birrell elf_file.ehdr.e_version = EV_CURRENT; 6876ff6d951SJohn Birrell elf_file.ehdr.e_shoff = sizeof (Elf64_Ehdr); 6886ff6d951SJohn Birrell elf_file.ehdr.e_ehsize = sizeof (Elf64_Ehdr); 6896ff6d951SJohn Birrell elf_file.ehdr.e_phentsize = sizeof (Elf64_Phdr); 6906ff6d951SJohn Birrell elf_file.ehdr.e_shentsize = sizeof (Elf64_Shdr); 6916ff6d951SJohn Birrell elf_file.ehdr.e_shnum = nshdr; 6926ff6d951SJohn Birrell elf_file.ehdr.e_shstrndx = ESHDR_SHSTRTAB; 6936ff6d951SJohn Birrell off = sizeof (elf_file) + nshdr * sizeof (Elf64_Shdr); 6946ff6d951SJohn Birrell 6956ff6d951SJohn Birrell shp = &elf_file.shdr[ESHDR_SHSTRTAB]; 6966ff6d951SJohn Birrell shp->sh_name = 1; /* DTRACE_SHSTRTAB64[1] = ".shstrtab" */ 6976ff6d951SJohn Birrell shp->sh_type = SHT_STRTAB; 6986ff6d951SJohn Birrell shp->sh_offset = off; 6996ff6d951SJohn Birrell shp->sh_size = sizeof (DTRACE_SHSTRTAB64); 7006ff6d951SJohn Birrell shp->sh_addralign = sizeof (char); 7016ff6d951SJohn Birrell off = P2ROUNDUP(shp->sh_offset + shp->sh_size, 8); 7026ff6d951SJohn Birrell 7036ff6d951SJohn Birrell shp = &elf_file.shdr[ESHDR_DOF]; 7046ff6d951SJohn Birrell shp->sh_name = 11; /* DTRACE_SHSTRTAB64[11] = ".SUNW_dof" */ 7056ff6d951SJohn Birrell shp->sh_flags = SHF_ALLOC; 7066ff6d951SJohn Birrell shp->sh_type = SHT_SUNW_dof; 7076ff6d951SJohn Birrell shp->sh_offset = off; 7086ff6d951SJohn Birrell shp->sh_size = dof->dofh_filesz; 7096ff6d951SJohn Birrell shp->sh_addralign = 8; 7106ff6d951SJohn Birrell off = shp->sh_offset + shp->sh_size; 7116ff6d951SJohn Birrell 7126ff6d951SJohn Birrell shp = &elf_file.shdr[ESHDR_STRTAB]; 7136ff6d951SJohn Birrell shp->sh_name = 21; /* DTRACE_SHSTRTAB64[21] = ".strtab" */ 7146ff6d951SJohn Birrell shp->sh_flags = SHF_ALLOC; 7156ff6d951SJohn Birrell shp->sh_type = SHT_STRTAB; 7166ff6d951SJohn Birrell shp->sh_offset = off; 7176ff6d951SJohn Birrell shp->sh_size = de.de_strlen; 7186ff6d951SJohn Birrell shp->sh_addralign = sizeof (char); 7196ff6d951SJohn Birrell off = P2ROUNDUP(shp->sh_offset + shp->sh_size, 8); 7206ff6d951SJohn Birrell 7216ff6d951SJohn Birrell shp = &elf_file.shdr[ESHDR_SYMTAB]; 7226ff6d951SJohn Birrell shp->sh_name = 29; /* DTRACE_SHSTRTAB64[29] = ".symtab" */ 7236ff6d951SJohn Birrell shp->sh_flags = SHF_ALLOC; 7246ff6d951SJohn Birrell shp->sh_type = SHT_SYMTAB; 7256ff6d951SJohn Birrell shp->sh_entsize = sizeof (Elf64_Sym); 7266ff6d951SJohn Birrell shp->sh_link = ESHDR_STRTAB; 7276ff6d951SJohn Birrell shp->sh_offset = off; 7286ff6d951SJohn Birrell shp->sh_info = de.de_global; 7296ff6d951SJohn Birrell shp->sh_size = de.de_nsym * sizeof (Elf64_Sym); 7306ff6d951SJohn Birrell shp->sh_addralign = 8; 7316ff6d951SJohn Birrell off = P2ROUNDUP(shp->sh_offset + shp->sh_size, 8); 7326ff6d951SJohn Birrell 7336ff6d951SJohn Birrell if (de.de_nrel == 0) { 7346ff6d951SJohn Birrell if (dt_write(dtp, fd, &elf_file, 7356ff6d951SJohn Birrell sizeof (elf_file)) != sizeof (elf_file) || 7366ff6d951SJohn Birrell PWRITE_SCN(ESHDR_SHSTRTAB, DTRACE_SHSTRTAB64) || 7376ff6d951SJohn Birrell PWRITE_SCN(ESHDR_STRTAB, de.de_strtab) || 7386ff6d951SJohn Birrell PWRITE_SCN(ESHDR_SYMTAB, de.de_sym) || 7396ff6d951SJohn Birrell PWRITE_SCN(ESHDR_DOF, dof)) { 7406ff6d951SJohn Birrell ret = dt_set_errno(dtp, errno); 7416ff6d951SJohn Birrell } 7426ff6d951SJohn Birrell } else { 7436ff6d951SJohn Birrell shp = &elf_file.shdr[ESHDR_REL]; 7446ff6d951SJohn Birrell shp->sh_name = 37; /* DTRACE_SHSTRTAB64[37] = ".rel.SUNW_dof" */ 7456ff6d951SJohn Birrell shp->sh_flags = SHF_ALLOC; 7466ff6d951SJohn Birrell shp->sh_type = SHT_RELA; 7476ff6d951SJohn Birrell shp->sh_entsize = sizeof (de.de_rel[0]); 7486ff6d951SJohn Birrell shp->sh_link = ESHDR_SYMTAB; 7496ff6d951SJohn Birrell shp->sh_info = ESHDR_DOF; 7506ff6d951SJohn Birrell shp->sh_offset = off; 7516ff6d951SJohn Birrell shp->sh_size = de.de_nrel * sizeof (de.de_rel[0]); 7526ff6d951SJohn Birrell shp->sh_addralign = 8; 7536ff6d951SJohn Birrell 7546ff6d951SJohn Birrell if (dt_write(dtp, fd, &elf_file, 7556ff6d951SJohn Birrell sizeof (elf_file)) != sizeof (elf_file) || 7566ff6d951SJohn Birrell PWRITE_SCN(ESHDR_SHSTRTAB, DTRACE_SHSTRTAB64) || 7576ff6d951SJohn Birrell PWRITE_SCN(ESHDR_STRTAB, de.de_strtab) || 7586ff6d951SJohn Birrell PWRITE_SCN(ESHDR_SYMTAB, de.de_sym) || 7596ff6d951SJohn Birrell PWRITE_SCN(ESHDR_REL, de.de_rel) || 7606ff6d951SJohn Birrell PWRITE_SCN(ESHDR_DOF, dof)) { 7616ff6d951SJohn Birrell ret = dt_set_errno(dtp, errno); 7626ff6d951SJohn Birrell } 7636ff6d951SJohn Birrell } 7646ff6d951SJohn Birrell 7656ff6d951SJohn Birrell free(de.de_strtab); 7666ff6d951SJohn Birrell free(de.de_sym); 7676ff6d951SJohn Birrell free(de.de_rel); 7686ff6d951SJohn Birrell 7696ff6d951SJohn Birrell return (ret); 7706ff6d951SJohn Birrell } 7716ff6d951SJohn Birrell 7726ff6d951SJohn Birrell static int 7736ff6d951SJohn Birrell dt_symtab_lookup(Elf_Data *data_sym, int nsym, uintptr_t addr, uint_t shn, 7746ff6d951SJohn Birrell GElf_Sym *sym) 7756ff6d951SJohn Birrell { 7766ff6d951SJohn Birrell int i, ret = -1; 7776ff6d951SJohn Birrell GElf_Sym s; 7786ff6d951SJohn Birrell 7796ff6d951SJohn Birrell for (i = 0; i < nsym && gelf_getsym(data_sym, i, sym) != NULL; i++) { 7806ff6d951SJohn Birrell if (GELF_ST_TYPE(sym->st_info) == STT_FUNC && 7816ff6d951SJohn Birrell shn == sym->st_shndx && 7826ff6d951SJohn Birrell sym->st_value <= addr && 7836ff6d951SJohn Birrell addr < sym->st_value + sym->st_size) { 7846ff6d951SJohn Birrell if (GELF_ST_BIND(sym->st_info) == STB_GLOBAL) 7856ff6d951SJohn Birrell return (0); 7866ff6d951SJohn Birrell 7876ff6d951SJohn Birrell ret = 0; 7886ff6d951SJohn Birrell s = *sym; 7896ff6d951SJohn Birrell } 7906ff6d951SJohn Birrell } 7916ff6d951SJohn Birrell 7926ff6d951SJohn Birrell if (ret == 0) 7936ff6d951SJohn Birrell *sym = s; 7946ff6d951SJohn Birrell return (ret); 7956ff6d951SJohn Birrell } 7966ff6d951SJohn Birrell 7972693feb4SJohn Birrell #if defined(__arm__) 7982693feb4SJohn Birrell /* XXX */ 7992693feb4SJohn Birrell static int 8002693feb4SJohn Birrell dt_modtext(dtrace_hdl_t *dtp, char *p, int isenabled, GElf_Rela *rela, 8012693feb4SJohn Birrell uint32_t *off) 8022693feb4SJohn Birrell { 8032693feb4SJohn Birrell printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__); 8042693feb4SJohn Birrell return (0); 8052693feb4SJohn Birrell } 8062693feb4SJohn Birrell #elif defined(__ia64__) 8072693feb4SJohn Birrell /* XXX */ 8082693feb4SJohn Birrell static int 8092693feb4SJohn Birrell dt_modtext(dtrace_hdl_t *dtp, char *p, int isenabled, GElf_Rela *rela, 8102693feb4SJohn Birrell uint32_t *off) 8112693feb4SJohn Birrell { 8122693feb4SJohn Birrell printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__); 8132693feb4SJohn Birrell return (0); 8142693feb4SJohn Birrell } 8152693feb4SJohn Birrell #elif defined(__mips__) 8162693feb4SJohn Birrell /* XXX */ 8172693feb4SJohn Birrell static int 8182693feb4SJohn Birrell dt_modtext(dtrace_hdl_t *dtp, char *p, int isenabled, GElf_Rela *rela, 8192693feb4SJohn Birrell uint32_t *off) 8202693feb4SJohn Birrell { 8212693feb4SJohn Birrell printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__); 8222693feb4SJohn Birrell return (0); 8232693feb4SJohn Birrell } 8242693feb4SJohn Birrell #elif defined(__powerpc__) 8252693feb4SJohn Birrell /* XXX */ 8262693feb4SJohn Birrell static int 8272693feb4SJohn Birrell dt_modtext(dtrace_hdl_t *dtp, char *p, int isenabled, GElf_Rela *rela, 8282693feb4SJohn Birrell uint32_t *off) 8292693feb4SJohn Birrell { 8302693feb4SJohn Birrell printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__); 8312693feb4SJohn Birrell return (0); 8322693feb4SJohn Birrell } 8332693feb4SJohn Birrell 8342693feb4SJohn Birrell #elif defined(__sparc) 8356ff6d951SJohn Birrell 8366ff6d951SJohn Birrell #define DT_OP_RET 0x81c7e008 8376ff6d951SJohn Birrell #define DT_OP_NOP 0x01000000 8386ff6d951SJohn Birrell #define DT_OP_CALL 0x40000000 8396ff6d951SJohn Birrell #define DT_OP_CLR_O0 0x90102000 8406ff6d951SJohn Birrell 8416ff6d951SJohn Birrell #define DT_IS_MOV_O7(inst) (((inst) & 0xffffe000) == 0x9e100000) 8426ff6d951SJohn Birrell #define DT_IS_RESTORE(inst) (((inst) & 0xc1f80000) == 0x81e80000) 8436ff6d951SJohn Birrell #define DT_IS_RETL(inst) (((inst) & 0xfff83fff) == 0x81c02008) 8446ff6d951SJohn Birrell 8456ff6d951SJohn Birrell #define DT_RS2(inst) ((inst) & 0x1f) 8466ff6d951SJohn Birrell #define DT_MAKE_RETL(reg) (0x81c02008 | ((reg) << 14)) 8476ff6d951SJohn Birrell 8486ff6d951SJohn Birrell /*ARGSUSED*/ 8496ff6d951SJohn Birrell static int 8506ff6d951SJohn Birrell dt_modtext(dtrace_hdl_t *dtp, char *p, int isenabled, GElf_Rela *rela, 8516ff6d951SJohn Birrell uint32_t *off) 8526ff6d951SJohn Birrell { 8536ff6d951SJohn Birrell uint32_t *ip; 8546ff6d951SJohn Birrell 8556ff6d951SJohn Birrell if ((rela->r_offset & (sizeof (uint32_t) - 1)) != 0) 8566ff6d951SJohn Birrell return (-1); 8576ff6d951SJohn Birrell 8586ff6d951SJohn Birrell /*LINTED*/ 8596ff6d951SJohn Birrell ip = (uint32_t *)(p + rela->r_offset); 8606ff6d951SJohn Birrell 8616ff6d951SJohn Birrell /* 8626ff6d951SJohn Birrell * We only know about some specific relocation types. 8636ff6d951SJohn Birrell */ 8646ff6d951SJohn Birrell if (GELF_R_TYPE(rela->r_info) != R_SPARC_WDISP30 && 8656ff6d951SJohn Birrell GELF_R_TYPE(rela->r_info) != R_SPARC_WPLT30) 8666ff6d951SJohn Birrell return (-1); 8676ff6d951SJohn Birrell 8686ff6d951SJohn Birrell /* 8696ff6d951SJohn Birrell * We may have already processed this object file in an earlier linker 8706ff6d951SJohn Birrell * invocation. Check to see if the present instruction sequence matches 8716ff6d951SJohn Birrell * the one we would install. 8726ff6d951SJohn Birrell */ 8736ff6d951SJohn Birrell if (isenabled) { 8746ff6d951SJohn Birrell if (ip[0] == DT_OP_CLR_O0) 8756ff6d951SJohn Birrell return (0); 8766ff6d951SJohn Birrell } else { 8776ff6d951SJohn Birrell if (DT_IS_RESTORE(ip[1])) { 8786ff6d951SJohn Birrell if (ip[0] == DT_OP_RET) 8796ff6d951SJohn Birrell return (0); 8806ff6d951SJohn Birrell } else if (DT_IS_MOV_O7(ip[1])) { 8816ff6d951SJohn Birrell if (DT_IS_RETL(ip[0])) 8826ff6d951SJohn Birrell return (0); 8836ff6d951SJohn Birrell } else { 8846ff6d951SJohn Birrell if (ip[0] == DT_OP_NOP) { 8856ff6d951SJohn Birrell (*off) += sizeof (ip[0]); 8866ff6d951SJohn Birrell return (0); 8876ff6d951SJohn Birrell } 8886ff6d951SJohn Birrell } 8896ff6d951SJohn Birrell } 8906ff6d951SJohn Birrell 8916ff6d951SJohn Birrell /* 8926ff6d951SJohn Birrell * We only expect call instructions with a displacement of 0. 8936ff6d951SJohn Birrell */ 8946ff6d951SJohn Birrell if (ip[0] != DT_OP_CALL) { 8956ff6d951SJohn Birrell dt_dprintf("found %x instead of a call instruction at %llx\n", 8966ff6d951SJohn Birrell ip[0], (u_longlong_t)rela->r_offset); 8976ff6d951SJohn Birrell return (-1); 8986ff6d951SJohn Birrell } 8996ff6d951SJohn Birrell 9006ff6d951SJohn Birrell if (isenabled) { 9016ff6d951SJohn Birrell /* 9026ff6d951SJohn Birrell * It would necessarily indicate incorrect usage if an is- 9036ff6d951SJohn Birrell * enabled probe were tail-called so flag that as an error. 9046ff6d951SJohn Birrell * It's also potentially (very) tricky to handle gracefully, 9056ff6d951SJohn Birrell * but could be done if this were a desired use scenario. 9066ff6d951SJohn Birrell */ 9076ff6d951SJohn Birrell if (DT_IS_RESTORE(ip[1]) || DT_IS_MOV_O7(ip[1])) { 9086ff6d951SJohn Birrell dt_dprintf("tail call to is-enabled probe at %llx\n", 9096ff6d951SJohn Birrell (u_longlong_t)rela->r_offset); 9106ff6d951SJohn Birrell return (-1); 9116ff6d951SJohn Birrell } 9126ff6d951SJohn Birrell 9136ff6d951SJohn Birrell ip[0] = DT_OP_CLR_O0; 9146ff6d951SJohn Birrell } else { 9156ff6d951SJohn Birrell /* 9166ff6d951SJohn Birrell * If the call is followed by a restore, it's a tail call so 9176ff6d951SJohn Birrell * change the call to a ret. If the call if followed by a mov 9186ff6d951SJohn Birrell * of a register into %o7, it's a tail call in leaf context 9196ff6d951SJohn Birrell * so change the call to a retl-like instruction that returns 9206ff6d951SJohn Birrell * to that register value + 8 (rather than the typical %o7 + 9216ff6d951SJohn Birrell * 8); the delay slot instruction is left, but should have no 9226ff6d951SJohn Birrell * effect. Otherwise we change the call to be a nop. In the 9236ff6d951SJohn Birrell * first and the last case we adjust the offset to land on what 9246ff6d951SJohn Birrell * was once the delay slot of the call so we correctly get all 9256ff6d951SJohn Birrell * the arguments as they would have been passed in a normal 9266ff6d951SJohn Birrell * function call. 9276ff6d951SJohn Birrell */ 9286ff6d951SJohn Birrell if (DT_IS_RESTORE(ip[1])) { 9296ff6d951SJohn Birrell ip[0] = DT_OP_RET; 9306ff6d951SJohn Birrell (*off) += sizeof (ip[0]); 9316ff6d951SJohn Birrell } else if (DT_IS_MOV_O7(ip[1])) { 9326ff6d951SJohn Birrell ip[0] = DT_MAKE_RETL(DT_RS2(ip[1])); 9336ff6d951SJohn Birrell } else { 9346ff6d951SJohn Birrell ip[0] = DT_OP_NOP; 9356ff6d951SJohn Birrell (*off) += sizeof (ip[0]); 9366ff6d951SJohn Birrell } 9376ff6d951SJohn Birrell } 9386ff6d951SJohn Birrell 9396ff6d951SJohn Birrell return (0); 9406ff6d951SJohn Birrell } 9416ff6d951SJohn Birrell 9426ff6d951SJohn Birrell #elif defined(__i386) || defined(__amd64) 9436ff6d951SJohn Birrell 9446ff6d951SJohn Birrell #define DT_OP_NOP 0x90 9452693feb4SJohn Birrell #define DT_OP_RET 0xc3 9466ff6d951SJohn Birrell #define DT_OP_CALL 0xe8 9472693feb4SJohn Birrell #define DT_OP_JMP32 0xe9 9486ff6d951SJohn Birrell #define DT_OP_REX_RAX 0x48 9496ff6d951SJohn Birrell #define DT_OP_XOR_EAX_0 0x33 9506ff6d951SJohn Birrell #define DT_OP_XOR_EAX_1 0xc0 9516ff6d951SJohn Birrell 9526ff6d951SJohn Birrell static int 9536ff6d951SJohn Birrell dt_modtext(dtrace_hdl_t *dtp, char *p, int isenabled, GElf_Rela *rela, 9546ff6d951SJohn Birrell uint32_t *off) 9556ff6d951SJohn Birrell { 9566ff6d951SJohn Birrell uint8_t *ip = (uint8_t *)(p + rela->r_offset - 1); 9572693feb4SJohn Birrell uint8_t ret; 9586ff6d951SJohn Birrell 9596ff6d951SJohn Birrell /* 9606ff6d951SJohn Birrell * On x86, the first byte of the instruction is the call opcode and 9616ff6d951SJohn Birrell * the next four bytes are the 32-bit address; the relocation is for 9626ff6d951SJohn Birrell * the address operand. We back up the offset to the first byte of 9636ff6d951SJohn Birrell * the instruction. For is-enabled probes, we later advance the offset 9646ff6d951SJohn Birrell * so that it hits the first nop in the instruction sequence. 9656ff6d951SJohn Birrell */ 9666ff6d951SJohn Birrell (*off) -= 1; 9676ff6d951SJohn Birrell 9686ff6d951SJohn Birrell /* 9696ff6d951SJohn Birrell * We only know about some specific relocation types. Luckily 9706ff6d951SJohn Birrell * these types have the same values on both 32-bit and 64-bit 9716ff6d951SJohn Birrell * x86 architectures. 9726ff6d951SJohn Birrell */ 9736ff6d951SJohn Birrell if (GELF_R_TYPE(rela->r_info) != R_386_PC32 && 9746ff6d951SJohn Birrell GELF_R_TYPE(rela->r_info) != R_386_PLT32) 9756ff6d951SJohn Birrell return (-1); 9766ff6d951SJohn Birrell 9776ff6d951SJohn Birrell /* 9786ff6d951SJohn Birrell * We may have already processed this object file in an earlier linker 9796ff6d951SJohn Birrell * invocation. Check to see if the present instruction sequence matches 9806ff6d951SJohn Birrell * the one we would install. For is-enabled probes, we advance the 9812693feb4SJohn Birrell * offset to the first nop instruction in the sequence to match the 9822693feb4SJohn Birrell * text modification code below. 9836ff6d951SJohn Birrell */ 9846ff6d951SJohn Birrell if (!isenabled) { 9852693feb4SJohn Birrell if ((ip[0] == DT_OP_NOP || ip[0] == DT_OP_RET) && 9862693feb4SJohn Birrell ip[1] == DT_OP_NOP && ip[2] == DT_OP_NOP && 9872693feb4SJohn Birrell ip[3] == DT_OP_NOP && ip[4] == DT_OP_NOP) 9886ff6d951SJohn Birrell return (0); 9896ff6d951SJohn Birrell } else if (dtp->dt_oflags & DTRACE_O_LP64) { 9906ff6d951SJohn Birrell if (ip[0] == DT_OP_REX_RAX && 9916ff6d951SJohn Birrell ip[1] == DT_OP_XOR_EAX_0 && ip[2] == DT_OP_XOR_EAX_1 && 9922693feb4SJohn Birrell (ip[3] == DT_OP_NOP || ip[3] == DT_OP_RET) && 9932693feb4SJohn Birrell ip[4] == DT_OP_NOP) { 9946ff6d951SJohn Birrell (*off) += 3; 9956ff6d951SJohn Birrell return (0); 9966ff6d951SJohn Birrell } 9976ff6d951SJohn Birrell } else { 9986ff6d951SJohn Birrell if (ip[0] == DT_OP_XOR_EAX_0 && ip[1] == DT_OP_XOR_EAX_1 && 9992693feb4SJohn Birrell (ip[2] == DT_OP_NOP || ip[2] == DT_OP_RET) && 10002693feb4SJohn Birrell ip[3] == DT_OP_NOP && ip[4] == DT_OP_NOP) { 10016ff6d951SJohn Birrell (*off) += 2; 10026ff6d951SJohn Birrell return (0); 10036ff6d951SJohn Birrell } 10046ff6d951SJohn Birrell } 10056ff6d951SJohn Birrell 10066ff6d951SJohn Birrell /* 10072693feb4SJohn Birrell * We expect either a call instrution with a 32-bit displacement or a 10082693feb4SJohn Birrell * jmp instruction with a 32-bit displacement acting as a tail-call. 10096ff6d951SJohn Birrell */ 10102693feb4SJohn Birrell if (ip[0] != DT_OP_CALL && ip[0] != DT_OP_JMP32) { 10112693feb4SJohn Birrell dt_dprintf("found %x instead of a call or jmp instruction at " 10122693feb4SJohn Birrell "%llx\n", ip[0], (u_longlong_t)rela->r_offset); 10136ff6d951SJohn Birrell return (-1); 10146ff6d951SJohn Birrell } 10156ff6d951SJohn Birrell 10162693feb4SJohn Birrell ret = (ip[0] == DT_OP_JMP32) ? DT_OP_RET : DT_OP_NOP; 10172693feb4SJohn Birrell 10186ff6d951SJohn Birrell /* 10196ff6d951SJohn Birrell * Establish the instruction sequence -- all nops for probes, and an 10206ff6d951SJohn Birrell * instruction to clear the return value register (%eax/%rax) followed 10216ff6d951SJohn Birrell * by nops for is-enabled probes. For is-enabled probes, we advance 10226ff6d951SJohn Birrell * the offset to the first nop. This isn't stricly necessary but makes 10236ff6d951SJohn Birrell * for more readable disassembly when the probe is enabled. 10246ff6d951SJohn Birrell */ 10256ff6d951SJohn Birrell if (!isenabled) { 10262693feb4SJohn Birrell ip[0] = ret; 10276ff6d951SJohn Birrell ip[1] = DT_OP_NOP; 10286ff6d951SJohn Birrell ip[2] = DT_OP_NOP; 10296ff6d951SJohn Birrell ip[3] = DT_OP_NOP; 10306ff6d951SJohn Birrell ip[4] = DT_OP_NOP; 10316ff6d951SJohn Birrell } else if (dtp->dt_oflags & DTRACE_O_LP64) { 10326ff6d951SJohn Birrell ip[0] = DT_OP_REX_RAX; 10336ff6d951SJohn Birrell ip[1] = DT_OP_XOR_EAX_0; 10346ff6d951SJohn Birrell ip[2] = DT_OP_XOR_EAX_1; 10352693feb4SJohn Birrell ip[3] = ret; 10366ff6d951SJohn Birrell ip[4] = DT_OP_NOP; 10376ff6d951SJohn Birrell (*off) += 3; 10386ff6d951SJohn Birrell } else { 10396ff6d951SJohn Birrell ip[0] = DT_OP_XOR_EAX_0; 10406ff6d951SJohn Birrell ip[1] = DT_OP_XOR_EAX_1; 10412693feb4SJohn Birrell ip[2] = ret; 10426ff6d951SJohn Birrell ip[3] = DT_OP_NOP; 10436ff6d951SJohn Birrell ip[4] = DT_OP_NOP; 10446ff6d951SJohn Birrell (*off) += 2; 10456ff6d951SJohn Birrell } 10466ff6d951SJohn Birrell 10476ff6d951SJohn Birrell return (0); 10486ff6d951SJohn Birrell } 10496ff6d951SJohn Birrell 10506ff6d951SJohn Birrell #else 10516ff6d951SJohn Birrell #error unknown ISA 10526ff6d951SJohn Birrell #endif 10536ff6d951SJohn Birrell 10546ff6d951SJohn Birrell /*PRINTFLIKE5*/ 10556ff6d951SJohn Birrell static int 10566ff6d951SJohn Birrell dt_link_error(dtrace_hdl_t *dtp, Elf *elf, int fd, dt_link_pair_t *bufs, 10576ff6d951SJohn Birrell const char *format, ...) 10586ff6d951SJohn Birrell { 10596ff6d951SJohn Birrell va_list ap; 10606ff6d951SJohn Birrell dt_link_pair_t *pair; 10616ff6d951SJohn Birrell 10626ff6d951SJohn Birrell va_start(ap, format); 10636ff6d951SJohn Birrell dt_set_errmsg(dtp, NULL, NULL, NULL, 0, format, ap); 10646ff6d951SJohn Birrell va_end(ap); 10656ff6d951SJohn Birrell 10666ff6d951SJohn Birrell if (elf != NULL) 10676ff6d951SJohn Birrell (void) elf_end(elf); 10686ff6d951SJohn Birrell 10696ff6d951SJohn Birrell if (fd >= 0) 10706ff6d951SJohn Birrell (void) close(fd); 10716ff6d951SJohn Birrell 10726ff6d951SJohn Birrell while ((pair = bufs) != NULL) { 10736ff6d951SJohn Birrell bufs = pair->dlp_next; 10746ff6d951SJohn Birrell dt_free(dtp, pair->dlp_str); 10756ff6d951SJohn Birrell dt_free(dtp, pair->dlp_sym); 10766ff6d951SJohn Birrell dt_free(dtp, pair); 10776ff6d951SJohn Birrell } 10786ff6d951SJohn Birrell 10796ff6d951SJohn Birrell return (dt_set_errno(dtp, EDT_COMPILER)); 10806ff6d951SJohn Birrell } 10816ff6d951SJohn Birrell 10826ff6d951SJohn Birrell static int 10836ff6d951SJohn Birrell process_obj(dtrace_hdl_t *dtp, const char *obj, int *eprobesp) 10846ff6d951SJohn Birrell { 10856ff6d951SJohn Birrell static const char dt_prefix[] = "__dtrace"; 10866ff6d951SJohn Birrell static const char dt_enabled[] = "enabled"; 10876ff6d951SJohn Birrell static const char dt_symprefix[] = "$dtrace"; 10886ff6d951SJohn Birrell static const char dt_symfmt[] = "%s%d.%s"; 10896ff6d951SJohn Birrell int fd, i, ndx, eprobe, mod = 0; 10906ff6d951SJohn Birrell Elf *elf = NULL; 10916ff6d951SJohn Birrell GElf_Ehdr ehdr; 10926ff6d951SJohn Birrell Elf_Scn *scn_rel, *scn_sym, *scn_str, *scn_tgt; 10936ff6d951SJohn Birrell Elf_Data *data_rel, *data_sym, *data_str, *data_tgt; 10946ff6d951SJohn Birrell GElf_Shdr shdr_rel, shdr_sym, shdr_str, shdr_tgt; 10956ff6d951SJohn Birrell GElf_Sym rsym, fsym, dsym; 10966ff6d951SJohn Birrell GElf_Rela rela; 10976ff6d951SJohn Birrell char *s, *p, *r; 10986ff6d951SJohn Birrell char pname[DTRACE_PROVNAMELEN]; 10996ff6d951SJohn Birrell dt_provider_t *pvp; 11006ff6d951SJohn Birrell dt_probe_t *prp; 11016ff6d951SJohn Birrell uint32_t off, eclass, emachine1, emachine2; 11026ff6d951SJohn Birrell size_t symsize, nsym, isym, istr, len; 11036ff6d951SJohn Birrell key_t objkey; 11046ff6d951SJohn Birrell dt_link_pair_t *pair, *bufs = NULL; 11056ff6d951SJohn Birrell dt_strtab_t *strtab; 11066ff6d951SJohn Birrell 11076ff6d951SJohn Birrell if ((fd = open64(obj, O_RDWR)) == -1) { 11086ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, 11096ff6d951SJohn Birrell "failed to open %s: %s", obj, strerror(errno))); 11106ff6d951SJohn Birrell } 11116ff6d951SJohn Birrell 11126ff6d951SJohn Birrell if ((elf = elf_begin(fd, ELF_C_RDWR, NULL)) == NULL) { 11136ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, 11146ff6d951SJohn Birrell "failed to process %s: %s", obj, elf_errmsg(elf_errno()))); 11156ff6d951SJohn Birrell } 11166ff6d951SJohn Birrell 11176ff6d951SJohn Birrell switch (elf_kind(elf)) { 11186ff6d951SJohn Birrell case ELF_K_ELF: 11196ff6d951SJohn Birrell break; 11206ff6d951SJohn Birrell case ELF_K_AR: 11216ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, "archives are not " 11226ff6d951SJohn Birrell "permitted; use the contents of the archive instead: %s", 11236ff6d951SJohn Birrell obj)); 11246ff6d951SJohn Birrell default: 11256ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, 11266ff6d951SJohn Birrell "invalid file type: %s", obj)); 11276ff6d951SJohn Birrell } 11286ff6d951SJohn Birrell 11296ff6d951SJohn Birrell if (gelf_getehdr(elf, &ehdr) == NULL) { 11306ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, "corrupt file: %s", 11316ff6d951SJohn Birrell obj)); 11326ff6d951SJohn Birrell } 11336ff6d951SJohn Birrell 11346ff6d951SJohn Birrell if (dtp->dt_oflags & DTRACE_O_LP64) { 11356ff6d951SJohn Birrell eclass = ELFCLASS64; 11362693feb4SJohn Birrell #if defined(__ia64__) 11372693feb4SJohn Birrell emachine1 = emachine2 = EM_IA_64; 11382693feb4SJohn Birrell #elif defined(__mips__) 11392693feb4SJohn Birrell emachine1 = emachine2 = EM_MIPS; 11402693feb4SJohn Birrell #elif defined(__powerpc__) 11412693feb4SJohn Birrell emachine1 = emachine2 = EM_PPC64; 11422693feb4SJohn Birrell #elif defined(__sparc) 11436ff6d951SJohn Birrell emachine1 = emachine2 = EM_SPARCV9; 11446ff6d951SJohn Birrell #elif defined(__i386) || defined(__amd64) 11456ff6d951SJohn Birrell emachine1 = emachine2 = EM_AMD64; 11466ff6d951SJohn Birrell #endif 11476ff6d951SJohn Birrell symsize = sizeof (Elf64_Sym); 11486ff6d951SJohn Birrell } else { 11496ff6d951SJohn Birrell eclass = ELFCLASS32; 11502693feb4SJohn Birrell #if defined(__arm__) 11512693feb4SJohn Birrell emachine1 = emachine2 = EM_ARM; 11522693feb4SJohn Birrell #elif defined(__mips__) 11532693feb4SJohn Birrell emachine1 = emachine2 = EM_MIPS; 11542693feb4SJohn Birrell #elif defined(__powerpc__) 11552693feb4SJohn Birrell emachine1 = emachine2 = EM_PPC; 11562693feb4SJohn Birrell #elif defined(__sparc) 11576ff6d951SJohn Birrell emachine1 = EM_SPARC; 11586ff6d951SJohn Birrell emachine2 = EM_SPARC32PLUS; 11592693feb4SJohn Birrell #elif defined(__i386) || defined(__amd64) || defined(__ia64__) 11606ff6d951SJohn Birrell emachine1 = emachine2 = EM_386; 11616ff6d951SJohn Birrell #endif 11626ff6d951SJohn Birrell symsize = sizeof (Elf32_Sym); 11636ff6d951SJohn Birrell } 11646ff6d951SJohn Birrell 11656ff6d951SJohn Birrell if (ehdr.e_ident[EI_CLASS] != eclass) { 11666ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, 11676ff6d951SJohn Birrell "incorrect ELF class for object file: %s", obj)); 11686ff6d951SJohn Birrell } 11696ff6d951SJohn Birrell 11706ff6d951SJohn Birrell if (ehdr.e_machine != emachine1 && ehdr.e_machine != emachine2) { 11716ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, 11726ff6d951SJohn Birrell "incorrect ELF machine type for object file: %s", obj)); 11736ff6d951SJohn Birrell } 11746ff6d951SJohn Birrell 11756ff6d951SJohn Birrell /* 11766ff6d951SJohn Birrell * We use this token as a relatively unique handle for this file on the 11776ff6d951SJohn Birrell * system in order to disambiguate potential conflicts between files of 11786ff6d951SJohn Birrell * the same name which contain identially named local symbols. 11796ff6d951SJohn Birrell */ 11806ff6d951SJohn Birrell if ((objkey = ftok(obj, 0)) == (key_t)-1) { 11816ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, 11826ff6d951SJohn Birrell "failed to generate unique key for object file: %s", obj)); 11836ff6d951SJohn Birrell } 11846ff6d951SJohn Birrell 11856ff6d951SJohn Birrell scn_rel = NULL; 11866ff6d951SJohn Birrell while ((scn_rel = elf_nextscn(elf, scn_rel)) != NULL) { 11876ff6d951SJohn Birrell if (gelf_getshdr(scn_rel, &shdr_rel) == NULL) 11886ff6d951SJohn Birrell goto err; 11896ff6d951SJohn Birrell 11906ff6d951SJohn Birrell /* 11916ff6d951SJohn Birrell * Skip any non-relocation sections. 11926ff6d951SJohn Birrell */ 11936ff6d951SJohn Birrell if (shdr_rel.sh_type != SHT_RELA && shdr_rel.sh_type != SHT_REL) 11946ff6d951SJohn Birrell continue; 11956ff6d951SJohn Birrell 11966ff6d951SJohn Birrell if ((data_rel = elf_getdata(scn_rel, NULL)) == NULL) 11976ff6d951SJohn Birrell goto err; 11986ff6d951SJohn Birrell 11996ff6d951SJohn Birrell /* 12006ff6d951SJohn Birrell * Grab the section, section header and section data for the 12016ff6d951SJohn Birrell * symbol table that this relocation section references. 12026ff6d951SJohn Birrell */ 12036ff6d951SJohn Birrell if ((scn_sym = elf_getscn(elf, shdr_rel.sh_link)) == NULL || 12046ff6d951SJohn Birrell gelf_getshdr(scn_sym, &shdr_sym) == NULL || 12056ff6d951SJohn Birrell (data_sym = elf_getdata(scn_sym, NULL)) == NULL) 12066ff6d951SJohn Birrell goto err; 12076ff6d951SJohn Birrell 12086ff6d951SJohn Birrell /* 12096ff6d951SJohn Birrell * Ditto for that symbol table's string table. 12106ff6d951SJohn Birrell */ 12116ff6d951SJohn Birrell if ((scn_str = elf_getscn(elf, shdr_sym.sh_link)) == NULL || 12126ff6d951SJohn Birrell gelf_getshdr(scn_str, &shdr_str) == NULL || 12136ff6d951SJohn Birrell (data_str = elf_getdata(scn_str, NULL)) == NULL) 12146ff6d951SJohn Birrell goto err; 12156ff6d951SJohn Birrell 12166ff6d951SJohn Birrell /* 12176ff6d951SJohn Birrell * Grab the section, section header and section data for the 12186ff6d951SJohn Birrell * target section for the relocations. For the relocations 12196ff6d951SJohn Birrell * we're looking for -- this will typically be the text of the 12206ff6d951SJohn Birrell * object file. 12216ff6d951SJohn Birrell */ 12226ff6d951SJohn Birrell if ((scn_tgt = elf_getscn(elf, shdr_rel.sh_info)) == NULL || 12236ff6d951SJohn Birrell gelf_getshdr(scn_tgt, &shdr_tgt) == NULL || 12246ff6d951SJohn Birrell (data_tgt = elf_getdata(scn_tgt, NULL)) == NULL) 12256ff6d951SJohn Birrell goto err; 12266ff6d951SJohn Birrell 12276ff6d951SJohn Birrell /* 12286ff6d951SJohn Birrell * We're looking for relocations to symbols matching this form: 12296ff6d951SJohn Birrell * 12306ff6d951SJohn Birrell * __dtrace[enabled]_<prov>___<probe> 12316ff6d951SJohn Birrell * 12326ff6d951SJohn Birrell * For the generated object, we need to record the location 12336ff6d951SJohn Birrell * identified by the relocation, and create a new relocation 12346ff6d951SJohn Birrell * in the generated object that will be resolved at link time 12356ff6d951SJohn Birrell * to the location of the function in which the probe is 12366ff6d951SJohn Birrell * embedded. In the target object, we change the matched symbol 12376ff6d951SJohn Birrell * so that it will be ignored at link time, and we modify the 12386ff6d951SJohn Birrell * target (text) section to replace the call instruction with 12396ff6d951SJohn Birrell * one or more nops. 12406ff6d951SJohn Birrell * 12416ff6d951SJohn Birrell * If the function containing the probe is locally scoped 12426ff6d951SJohn Birrell * (static), we create an alias used by the relocation in the 12436ff6d951SJohn Birrell * generated object. The alias, a new symbol, will be global 12446ff6d951SJohn Birrell * (so that the relocation from the generated object can be 12456ff6d951SJohn Birrell * resolved), and hidden (so that it is converted to a local 12466ff6d951SJohn Birrell * symbol at link time). Such aliases have this form: 12476ff6d951SJohn Birrell * 12486ff6d951SJohn Birrell * $dtrace<key>.<function> 12496ff6d951SJohn Birrell * 12506ff6d951SJohn Birrell * We take a first pass through all the relocations to 12516ff6d951SJohn Birrell * populate our string table and count the number of extra 12526ff6d951SJohn Birrell * symbols we'll require. 12536ff6d951SJohn Birrell */ 12546ff6d951SJohn Birrell strtab = dt_strtab_create(1); 12556ff6d951SJohn Birrell nsym = 0; 12566ff6d951SJohn Birrell isym = data_sym->d_size / symsize; 12576ff6d951SJohn Birrell istr = data_str->d_size; 12586ff6d951SJohn Birrell 12596ff6d951SJohn Birrell for (i = 0; i < shdr_rel.sh_size / shdr_rel.sh_entsize; i++) { 12606ff6d951SJohn Birrell 12616ff6d951SJohn Birrell if (shdr_rel.sh_type == SHT_RELA) { 12626ff6d951SJohn Birrell if (gelf_getrela(data_rel, i, &rela) == NULL) 12636ff6d951SJohn Birrell continue; 12646ff6d951SJohn Birrell } else { 12656ff6d951SJohn Birrell GElf_Rel rel; 12666ff6d951SJohn Birrell if (gelf_getrel(data_rel, i, &rel) == NULL) 12676ff6d951SJohn Birrell continue; 12686ff6d951SJohn Birrell rela.r_offset = rel.r_offset; 12696ff6d951SJohn Birrell rela.r_info = rel.r_info; 12706ff6d951SJohn Birrell rela.r_addend = 0; 12716ff6d951SJohn Birrell } 12726ff6d951SJohn Birrell 12736ff6d951SJohn Birrell if (gelf_getsym(data_sym, GELF_R_SYM(rela.r_info), 12746ff6d951SJohn Birrell &rsym) == NULL) { 12756ff6d951SJohn Birrell dt_strtab_destroy(strtab); 12766ff6d951SJohn Birrell goto err; 12776ff6d951SJohn Birrell } 12786ff6d951SJohn Birrell 12796ff6d951SJohn Birrell s = (char *)data_str->d_buf + rsym.st_name; 12806ff6d951SJohn Birrell 12816ff6d951SJohn Birrell if (strncmp(s, dt_prefix, sizeof (dt_prefix) - 1) != 0) 12826ff6d951SJohn Birrell continue; 12836ff6d951SJohn Birrell 12846ff6d951SJohn Birrell if (dt_symtab_lookup(data_sym, isym, rela.r_offset, 12856ff6d951SJohn Birrell shdr_rel.sh_info, &fsym) != 0) { 12866ff6d951SJohn Birrell dt_strtab_destroy(strtab); 12876ff6d951SJohn Birrell goto err; 12886ff6d951SJohn Birrell } 12896ff6d951SJohn Birrell 12906ff6d951SJohn Birrell if (GELF_ST_BIND(fsym.st_info) != STB_LOCAL) 12916ff6d951SJohn Birrell continue; 12926ff6d951SJohn Birrell 12936ff6d951SJohn Birrell if (fsym.st_name > data_str->d_size) { 12946ff6d951SJohn Birrell dt_strtab_destroy(strtab); 12956ff6d951SJohn Birrell goto err; 12966ff6d951SJohn Birrell } 12976ff6d951SJohn Birrell 12986ff6d951SJohn Birrell s = (char *)data_str->d_buf + fsym.st_name; 12996ff6d951SJohn Birrell 13006ff6d951SJohn Birrell /* 13016ff6d951SJohn Birrell * If this symbol isn't of type function, we've really 13026ff6d951SJohn Birrell * driven off the rails or the object file is corrupt. 13036ff6d951SJohn Birrell */ 13046ff6d951SJohn Birrell if (GELF_ST_TYPE(fsym.st_info) != STT_FUNC) { 13056ff6d951SJohn Birrell dt_strtab_destroy(strtab); 13066ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, 13076ff6d951SJohn Birrell "expected %s to be of type function", s)); 13086ff6d951SJohn Birrell } 13096ff6d951SJohn Birrell 13106ff6d951SJohn Birrell len = snprintf(NULL, 0, dt_symfmt, dt_symprefix, 13116ff6d951SJohn Birrell objkey, s) + 1; 13126ff6d951SJohn Birrell if ((p = dt_alloc(dtp, len)) == NULL) { 13136ff6d951SJohn Birrell dt_strtab_destroy(strtab); 13146ff6d951SJohn Birrell goto err; 13156ff6d951SJohn Birrell } 13166ff6d951SJohn Birrell (void) snprintf(p, len, dt_symfmt, dt_symprefix, 13176ff6d951SJohn Birrell objkey, s); 13186ff6d951SJohn Birrell 13196ff6d951SJohn Birrell if (dt_strtab_index(strtab, p) == -1) { 13206ff6d951SJohn Birrell nsym++; 13216ff6d951SJohn Birrell (void) dt_strtab_insert(strtab, p); 13226ff6d951SJohn Birrell } 13236ff6d951SJohn Birrell 13246ff6d951SJohn Birrell dt_free(dtp, p); 13256ff6d951SJohn Birrell } 13266ff6d951SJohn Birrell 13276ff6d951SJohn Birrell /* 13286ff6d951SJohn Birrell * If needed, allocate the additional space for the symbol 13296ff6d951SJohn Birrell * table and string table copying the old data into the new 13306ff6d951SJohn Birrell * buffers, and marking the buffers as dirty. We inject those 13316ff6d951SJohn Birrell * newly allocated buffers into the libelf data structures, but 13326ff6d951SJohn Birrell * are still responsible for freeing them once we're done with 13336ff6d951SJohn Birrell * the elf handle. 13346ff6d951SJohn Birrell */ 13356ff6d951SJohn Birrell if (nsym > 0) { 13366ff6d951SJohn Birrell /* 13376ff6d951SJohn Birrell * The first byte of the string table is reserved for 13386ff6d951SJohn Birrell * the \0 entry. 13396ff6d951SJohn Birrell */ 13406ff6d951SJohn Birrell len = dt_strtab_size(strtab) - 1; 13416ff6d951SJohn Birrell 13426ff6d951SJohn Birrell assert(len > 0); 13436ff6d951SJohn Birrell assert(dt_strtab_index(strtab, "") == 0); 13446ff6d951SJohn Birrell 13456ff6d951SJohn Birrell dt_strtab_destroy(strtab); 13466ff6d951SJohn Birrell 13476ff6d951SJohn Birrell if ((pair = dt_alloc(dtp, sizeof (*pair))) == NULL) 13486ff6d951SJohn Birrell goto err; 13496ff6d951SJohn Birrell 13506ff6d951SJohn Birrell if ((pair->dlp_str = dt_alloc(dtp, data_str->d_size + 13516ff6d951SJohn Birrell len)) == NULL) { 13526ff6d951SJohn Birrell dt_free(dtp, pair); 13536ff6d951SJohn Birrell goto err; 13546ff6d951SJohn Birrell } 13556ff6d951SJohn Birrell 13566ff6d951SJohn Birrell if ((pair->dlp_sym = dt_alloc(dtp, data_sym->d_size + 13576ff6d951SJohn Birrell nsym * symsize)) == NULL) { 13586ff6d951SJohn Birrell dt_free(dtp, pair->dlp_str); 13596ff6d951SJohn Birrell dt_free(dtp, pair); 13606ff6d951SJohn Birrell goto err; 13616ff6d951SJohn Birrell } 13626ff6d951SJohn Birrell 13636ff6d951SJohn Birrell pair->dlp_next = bufs; 13646ff6d951SJohn Birrell bufs = pair; 13656ff6d951SJohn Birrell 13666ff6d951SJohn Birrell bcopy(data_str->d_buf, pair->dlp_str, data_str->d_size); 13676ff6d951SJohn Birrell data_str->d_buf = pair->dlp_str; 13686ff6d951SJohn Birrell data_str->d_size += len; 13696ff6d951SJohn Birrell (void) elf_flagdata(data_str, ELF_C_SET, ELF_F_DIRTY); 13706ff6d951SJohn Birrell 13716ff6d951SJohn Birrell shdr_str.sh_size += len; 13726ff6d951SJohn Birrell (void) gelf_update_shdr(scn_str, &shdr_str); 13736ff6d951SJohn Birrell 13746ff6d951SJohn Birrell bcopy(data_sym->d_buf, pair->dlp_sym, data_sym->d_size); 13756ff6d951SJohn Birrell data_sym->d_buf = pair->dlp_sym; 13766ff6d951SJohn Birrell data_sym->d_size += nsym * symsize; 13776ff6d951SJohn Birrell (void) elf_flagdata(data_sym, ELF_C_SET, ELF_F_DIRTY); 13786ff6d951SJohn Birrell 13796ff6d951SJohn Birrell shdr_sym.sh_size += nsym * symsize; 13806ff6d951SJohn Birrell (void) gelf_update_shdr(scn_sym, &shdr_sym); 13816ff6d951SJohn Birrell 13826ff6d951SJohn Birrell nsym += isym; 13836ff6d951SJohn Birrell } else { 13846ff6d951SJohn Birrell dt_strtab_destroy(strtab); 13856ff6d951SJohn Birrell } 13866ff6d951SJohn Birrell 13876ff6d951SJohn Birrell /* 13886ff6d951SJohn Birrell * Now that the tables have been allocated, perform the 13896ff6d951SJohn Birrell * modifications described above. 13906ff6d951SJohn Birrell */ 13916ff6d951SJohn Birrell for (i = 0; i < shdr_rel.sh_size / shdr_rel.sh_entsize; i++) { 13926ff6d951SJohn Birrell 13936ff6d951SJohn Birrell if (shdr_rel.sh_type == SHT_RELA) { 13946ff6d951SJohn Birrell if (gelf_getrela(data_rel, i, &rela) == NULL) 13956ff6d951SJohn Birrell continue; 13966ff6d951SJohn Birrell } else { 13976ff6d951SJohn Birrell GElf_Rel rel; 13986ff6d951SJohn Birrell if (gelf_getrel(data_rel, i, &rel) == NULL) 13996ff6d951SJohn Birrell continue; 14006ff6d951SJohn Birrell rela.r_offset = rel.r_offset; 14016ff6d951SJohn Birrell rela.r_info = rel.r_info; 14026ff6d951SJohn Birrell rela.r_addend = 0; 14036ff6d951SJohn Birrell } 14046ff6d951SJohn Birrell 14056ff6d951SJohn Birrell ndx = GELF_R_SYM(rela.r_info); 14066ff6d951SJohn Birrell 14076ff6d951SJohn Birrell if (gelf_getsym(data_sym, ndx, &rsym) == NULL || 14086ff6d951SJohn Birrell rsym.st_name > data_str->d_size) 14096ff6d951SJohn Birrell goto err; 14106ff6d951SJohn Birrell 14116ff6d951SJohn Birrell s = (char *)data_str->d_buf + rsym.st_name; 14126ff6d951SJohn Birrell 14136ff6d951SJohn Birrell if (strncmp(s, dt_prefix, sizeof (dt_prefix) - 1) != 0) 14146ff6d951SJohn Birrell continue; 14156ff6d951SJohn Birrell 14166ff6d951SJohn Birrell s += sizeof (dt_prefix) - 1; 14176ff6d951SJohn Birrell 14186ff6d951SJohn Birrell /* 14196ff6d951SJohn Birrell * Check to see if this is an 'is-enabled' check as 14206ff6d951SJohn Birrell * opposed to a normal probe. 14216ff6d951SJohn Birrell */ 14226ff6d951SJohn Birrell if (strncmp(s, dt_enabled, 14236ff6d951SJohn Birrell sizeof (dt_enabled) - 1) == 0) { 14246ff6d951SJohn Birrell s += sizeof (dt_enabled) - 1; 14256ff6d951SJohn Birrell eprobe = 1; 14266ff6d951SJohn Birrell *eprobesp = 1; 14276ff6d951SJohn Birrell dt_dprintf("is-enabled probe\n"); 14286ff6d951SJohn Birrell } else { 14296ff6d951SJohn Birrell eprobe = 0; 14306ff6d951SJohn Birrell dt_dprintf("normal probe\n"); 14316ff6d951SJohn Birrell } 14326ff6d951SJohn Birrell 14336ff6d951SJohn Birrell if (*s++ != '_') 14346ff6d951SJohn Birrell goto err; 14356ff6d951SJohn Birrell 14366ff6d951SJohn Birrell if ((p = strstr(s, "___")) == NULL || 14376ff6d951SJohn Birrell p - s >= sizeof (pname)) 14386ff6d951SJohn Birrell goto err; 14396ff6d951SJohn Birrell 14406ff6d951SJohn Birrell bcopy(s, pname, p - s); 14416ff6d951SJohn Birrell pname[p - s] = '\0'; 14426ff6d951SJohn Birrell 14436ff6d951SJohn Birrell p = strhyphenate(p + 3); /* strlen("___") */ 14446ff6d951SJohn Birrell 14456ff6d951SJohn Birrell if (dt_symtab_lookup(data_sym, isym, rela.r_offset, 14466ff6d951SJohn Birrell shdr_rel.sh_info, &fsym) != 0) 14476ff6d951SJohn Birrell goto err; 14486ff6d951SJohn Birrell 14496ff6d951SJohn Birrell if (fsym.st_name > data_str->d_size) 14506ff6d951SJohn Birrell goto err; 14516ff6d951SJohn Birrell 14526ff6d951SJohn Birrell assert(GELF_ST_TYPE(fsym.st_info) == STT_FUNC); 14536ff6d951SJohn Birrell 14546ff6d951SJohn Birrell /* 14556ff6d951SJohn Birrell * If a NULL relocation name is passed to 14566ff6d951SJohn Birrell * dt_probe_define(), the function name is used for the 14576ff6d951SJohn Birrell * relocation. The relocation needs to use a mangled 14586ff6d951SJohn Birrell * name if the symbol is locally scoped; the function 14596ff6d951SJohn Birrell * name may need to change if we've found the global 14606ff6d951SJohn Birrell * alias for the locally scoped symbol (we prefer 14616ff6d951SJohn Birrell * global symbols to locals in dt_symtab_lookup()). 14626ff6d951SJohn Birrell */ 14636ff6d951SJohn Birrell s = (char *)data_str->d_buf + fsym.st_name; 14646ff6d951SJohn Birrell r = NULL; 14656ff6d951SJohn Birrell 14666ff6d951SJohn Birrell if (GELF_ST_BIND(fsym.st_info) == STB_LOCAL) { 14676ff6d951SJohn Birrell dsym = fsym; 14686ff6d951SJohn Birrell dsym.st_name = istr; 14696ff6d951SJohn Birrell dsym.st_info = GELF_ST_INFO(STB_GLOBAL, 14706ff6d951SJohn Birrell STT_FUNC); 14716ff6d951SJohn Birrell dsym.st_other = 14726ff6d951SJohn Birrell ELF64_ST_VISIBILITY(STV_ELIMINATE); 14736ff6d951SJohn Birrell (void) gelf_update_sym(data_sym, isym, &dsym); 14746ff6d951SJohn Birrell 14756ff6d951SJohn Birrell r = (char *)data_str->d_buf + istr; 14766ff6d951SJohn Birrell istr += 1 + sprintf(r, dt_symfmt, 14776ff6d951SJohn Birrell dt_symprefix, objkey, s); 14786ff6d951SJohn Birrell isym++; 14796ff6d951SJohn Birrell assert(isym <= nsym); 14806ff6d951SJohn Birrell 14816ff6d951SJohn Birrell } else if (strncmp(s, dt_symprefix, 14826ff6d951SJohn Birrell strlen(dt_symprefix)) == 0) { 14836ff6d951SJohn Birrell r = s; 14846ff6d951SJohn Birrell if ((s = strchr(s, '.')) == NULL) 14856ff6d951SJohn Birrell goto err; 14866ff6d951SJohn Birrell s++; 14876ff6d951SJohn Birrell } 14886ff6d951SJohn Birrell 14896ff6d951SJohn Birrell if ((pvp = dt_provider_lookup(dtp, pname)) == NULL) { 14906ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, 14916ff6d951SJohn Birrell "no such provider %s", pname)); 14926ff6d951SJohn Birrell } 14936ff6d951SJohn Birrell 14946ff6d951SJohn Birrell if ((prp = dt_probe_lookup(pvp, p)) == NULL) { 14956ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, 14966ff6d951SJohn Birrell "no such probe %s", p)); 14976ff6d951SJohn Birrell } 14986ff6d951SJohn Birrell 14996ff6d951SJohn Birrell assert(fsym.st_value <= rela.r_offset); 15006ff6d951SJohn Birrell 15016ff6d951SJohn Birrell off = rela.r_offset - fsym.st_value; 15026ff6d951SJohn Birrell if (dt_modtext(dtp, data_tgt->d_buf, eprobe, 15036ff6d951SJohn Birrell &rela, &off) != 0) { 15046ff6d951SJohn Birrell goto err; 15056ff6d951SJohn Birrell } 15066ff6d951SJohn Birrell 15076ff6d951SJohn Birrell if (dt_probe_define(pvp, prp, s, r, off, eprobe) != 0) { 15086ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, 15096ff6d951SJohn Birrell "failed to allocate space for probe")); 15106ff6d951SJohn Birrell } 15116ff6d951SJohn Birrell 15126ff6d951SJohn Birrell mod = 1; 15136ff6d951SJohn Birrell (void) elf_flagdata(data_tgt, ELF_C_SET, ELF_F_DIRTY); 15146ff6d951SJohn Birrell 15156ff6d951SJohn Birrell /* 15166ff6d951SJohn Birrell * This symbol may already have been marked to 15176ff6d951SJohn Birrell * be ignored by another relocation referencing 15186ff6d951SJohn Birrell * the same symbol or if this object file has 15196ff6d951SJohn Birrell * already been processed by an earlier link 15206ff6d951SJohn Birrell * invocation. 15216ff6d951SJohn Birrell */ 15222693feb4SJohn Birrell printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__); 15232693feb4SJohn Birrell #ifdef DOODAD 15246ff6d951SJohn Birrell if (rsym.st_shndx != SHN_SUNW_IGNORE) { 15256ff6d951SJohn Birrell rsym.st_shndx = SHN_SUNW_IGNORE; 15266ff6d951SJohn Birrell (void) gelf_update_sym(data_sym, ndx, &rsym); 15276ff6d951SJohn Birrell } 15282693feb4SJohn Birrell #endif 15296ff6d951SJohn Birrell } 15306ff6d951SJohn Birrell } 15316ff6d951SJohn Birrell 15326ff6d951SJohn Birrell if (mod && elf_update(elf, ELF_C_WRITE) == -1) 15336ff6d951SJohn Birrell goto err; 15346ff6d951SJohn Birrell 15356ff6d951SJohn Birrell (void) elf_end(elf); 15366ff6d951SJohn Birrell (void) close(fd); 15376ff6d951SJohn Birrell 15386ff6d951SJohn Birrell while ((pair = bufs) != NULL) { 15396ff6d951SJohn Birrell bufs = pair->dlp_next; 15406ff6d951SJohn Birrell dt_free(dtp, pair->dlp_str); 15416ff6d951SJohn Birrell dt_free(dtp, pair->dlp_sym); 15426ff6d951SJohn Birrell dt_free(dtp, pair); 15436ff6d951SJohn Birrell } 15446ff6d951SJohn Birrell 15456ff6d951SJohn Birrell return (0); 15466ff6d951SJohn Birrell 15476ff6d951SJohn Birrell err: 15486ff6d951SJohn Birrell return (dt_link_error(dtp, elf, fd, bufs, 15496ff6d951SJohn Birrell "an error was encountered while processing %s", obj)); 15506ff6d951SJohn Birrell } 15516ff6d951SJohn Birrell 15526ff6d951SJohn Birrell int 15536ff6d951SJohn Birrell dtrace_program_link(dtrace_hdl_t *dtp, dtrace_prog_t *pgp, uint_t dflags, 15546ff6d951SJohn Birrell const char *file, int objc, char *const objv[]) 15556ff6d951SJohn Birrell { 15562693feb4SJohn Birrell #if !defined(sun) 15572693feb4SJohn Birrell char tfile[PATH_MAX]; 15582693feb4SJohn Birrell #endif 15596ff6d951SJohn Birrell char drti[PATH_MAX]; 15606ff6d951SJohn Birrell dof_hdr_t *dof; 15616ff6d951SJohn Birrell int fd, status, i, cur; 15626ff6d951SJohn Birrell char *cmd, tmp; 15636ff6d951SJohn Birrell size_t len; 15646ff6d951SJohn Birrell int eprobes = 0, ret = 0; 15656ff6d951SJohn Birrell 15662693feb4SJohn Birrell #if !defined(sun) 15672693feb4SJohn Birrell /* XXX Should get a temp file name here. */ 15682693feb4SJohn Birrell snprintf(tfile, sizeof(tfile), "%s.tmp", file); 15692693feb4SJohn Birrell #endif 15702693feb4SJohn Birrell 15716ff6d951SJohn Birrell /* 15726ff6d951SJohn Birrell * A NULL program indicates a special use in which we just link 15736ff6d951SJohn Birrell * together a bunch of object files specified in objv and then 15746ff6d951SJohn Birrell * unlink(2) those object files. 15756ff6d951SJohn Birrell */ 15766ff6d951SJohn Birrell if (pgp == NULL) { 15776ff6d951SJohn Birrell const char *fmt = "%s -o %s -r"; 15786ff6d951SJohn Birrell 15796ff6d951SJohn Birrell len = snprintf(&tmp, 1, fmt, dtp->dt_ld_path, file) + 1; 15806ff6d951SJohn Birrell 15816ff6d951SJohn Birrell for (i = 0; i < objc; i++) 15826ff6d951SJohn Birrell len += strlen(objv[i]) + 1; 15836ff6d951SJohn Birrell 15846ff6d951SJohn Birrell cmd = alloca(len); 15856ff6d951SJohn Birrell 15866ff6d951SJohn Birrell cur = snprintf(cmd, len, fmt, dtp->dt_ld_path, file); 15876ff6d951SJohn Birrell 15886ff6d951SJohn Birrell for (i = 0; i < objc; i++) 15896ff6d951SJohn Birrell cur += snprintf(cmd + cur, len - cur, " %s", objv[i]); 15906ff6d951SJohn Birrell 15916ff6d951SJohn Birrell if ((status = system(cmd)) == -1) { 15926ff6d951SJohn Birrell return (dt_link_error(dtp, NULL, -1, NULL, 15936ff6d951SJohn Birrell "failed to run %s: %s", dtp->dt_ld_path, 15946ff6d951SJohn Birrell strerror(errno))); 15956ff6d951SJohn Birrell } 15966ff6d951SJohn Birrell 15976ff6d951SJohn Birrell if (WIFSIGNALED(status)) { 15986ff6d951SJohn Birrell return (dt_link_error(dtp, NULL, -1, NULL, 15996ff6d951SJohn Birrell "failed to link %s: %s failed due to signal %d", 16006ff6d951SJohn Birrell file, dtp->dt_ld_path, WTERMSIG(status))); 16016ff6d951SJohn Birrell } 16026ff6d951SJohn Birrell 16036ff6d951SJohn Birrell if (WEXITSTATUS(status) != 0) { 16046ff6d951SJohn Birrell return (dt_link_error(dtp, NULL, -1, NULL, 16056ff6d951SJohn Birrell "failed to link %s: %s exited with status %d\n", 16066ff6d951SJohn Birrell file, dtp->dt_ld_path, WEXITSTATUS(status))); 16076ff6d951SJohn Birrell } 16086ff6d951SJohn Birrell 16096ff6d951SJohn Birrell for (i = 0; i < objc; i++) { 16106ff6d951SJohn Birrell if (strcmp(objv[i], file) != 0) 16116ff6d951SJohn Birrell (void) unlink(objv[i]); 16126ff6d951SJohn Birrell } 16136ff6d951SJohn Birrell 16146ff6d951SJohn Birrell return (0); 16156ff6d951SJohn Birrell } 16166ff6d951SJohn Birrell 16176ff6d951SJohn Birrell for (i = 0; i < objc; i++) { 16186ff6d951SJohn Birrell if (process_obj(dtp, objv[i], &eprobes) != 0) 16196ff6d951SJohn Birrell return (-1); /* errno is set for us */ 16206ff6d951SJohn Birrell } 16216ff6d951SJohn Birrell 16226ff6d951SJohn Birrell /* 16236ff6d951SJohn Birrell * If there are is-enabled probes then we need to force use of DOF 16246ff6d951SJohn Birrell * version 2. 16256ff6d951SJohn Birrell */ 16266ff6d951SJohn Birrell if (eprobes && pgp->dp_dofversion < DOF_VERSION_2) 16276ff6d951SJohn Birrell pgp->dp_dofversion = DOF_VERSION_2; 16286ff6d951SJohn Birrell 16296ff6d951SJohn Birrell if ((dof = dtrace_dof_create(dtp, pgp, dflags)) == NULL) 16306ff6d951SJohn Birrell return (-1); /* errno is set for us */ 16316ff6d951SJohn Birrell 16322693feb4SJohn Birrell #if defined(sun) 16336ff6d951SJohn Birrell /* 16346ff6d951SJohn Birrell * Create a temporary file and then unlink it if we're going to 16356ff6d951SJohn Birrell * combine it with drti.o later. We can still refer to it in child 16366ff6d951SJohn Birrell * processes as /dev/fd/<fd>. 16376ff6d951SJohn Birrell */ 16386ff6d951SJohn Birrell if ((fd = open64(file, O_RDWR | O_CREAT | O_TRUNC, 0666)) == -1) { 16396ff6d951SJohn Birrell return (dt_link_error(dtp, NULL, -1, NULL, 16406ff6d951SJohn Birrell "failed to open %s: %s", file, strerror(errno))); 16416ff6d951SJohn Birrell } 16422693feb4SJohn Birrell #else 16432693feb4SJohn Birrell if ((fd = open(tfile, O_RDWR | O_CREAT | O_TRUNC, 0666)) == -1) 16442693feb4SJohn Birrell return (dt_link_error(dtp, NULL, -1, NULL, 16452693feb4SJohn Birrell "failed to open %s: %s", tfile, strerror(errno))); 16462693feb4SJohn Birrell #endif 16476ff6d951SJohn Birrell 16486ff6d951SJohn Birrell /* 16496ff6d951SJohn Birrell * If -xlinktype=DOF has been selected, just write out the DOF. 16506ff6d951SJohn Birrell * Otherwise proceed to the default of generating and linking ELF. 16516ff6d951SJohn Birrell */ 16526ff6d951SJohn Birrell switch (dtp->dt_linktype) { 16536ff6d951SJohn Birrell case DT_LTYP_DOF: 16546ff6d951SJohn Birrell if (dt_write(dtp, fd, dof, dof->dofh_filesz) < dof->dofh_filesz) 16556ff6d951SJohn Birrell ret = errno; 16566ff6d951SJohn Birrell 16576ff6d951SJohn Birrell if (close(fd) != 0 && ret == 0) 16586ff6d951SJohn Birrell ret = errno; 16596ff6d951SJohn Birrell 16606ff6d951SJohn Birrell if (ret != 0) { 16616ff6d951SJohn Birrell return (dt_link_error(dtp, NULL, -1, NULL, 16626ff6d951SJohn Birrell "failed to write %s: %s", file, strerror(ret))); 16636ff6d951SJohn Birrell } 16646ff6d951SJohn Birrell 16656ff6d951SJohn Birrell return (0); 16666ff6d951SJohn Birrell 16676ff6d951SJohn Birrell case DT_LTYP_ELF: 16686ff6d951SJohn Birrell break; /* fall through to the rest of dtrace_program_link() */ 16696ff6d951SJohn Birrell 16706ff6d951SJohn Birrell default: 16716ff6d951SJohn Birrell return (dt_link_error(dtp, NULL, -1, NULL, 16726ff6d951SJohn Birrell "invalid link type %u\n", dtp->dt_linktype)); 16736ff6d951SJohn Birrell } 16746ff6d951SJohn Birrell 16756ff6d951SJohn Birrell 16762693feb4SJohn Birrell #if defined(sun) 16776ff6d951SJohn Birrell if (!dtp->dt_lazyload) 16786ff6d951SJohn Birrell (void) unlink(file); 16792693feb4SJohn Birrell #endif 16806ff6d951SJohn Birrell 16816ff6d951SJohn Birrell if (dtp->dt_oflags & DTRACE_O_LP64) 16826ff6d951SJohn Birrell status = dump_elf64(dtp, dof, fd); 16836ff6d951SJohn Birrell else 16846ff6d951SJohn Birrell status = dump_elf32(dtp, dof, fd); 16856ff6d951SJohn Birrell 16866ff6d951SJohn Birrell if (status != 0 || lseek(fd, 0, SEEK_SET) != 0) { 16876ff6d951SJohn Birrell return (dt_link_error(dtp, NULL, -1, NULL, 16886ff6d951SJohn Birrell "failed to write %s: %s", file, strerror(errno))); 16896ff6d951SJohn Birrell } 16906ff6d951SJohn Birrell 16916ff6d951SJohn Birrell if (!dtp->dt_lazyload) { 16922693feb4SJohn Birrell #if defined(sun) 16936ff6d951SJohn Birrell const char *fmt = "%s -o %s -r -Blocal -Breduce /dev/fd/%d %s"; 16946ff6d951SJohn Birrell 16956ff6d951SJohn Birrell if (dtp->dt_oflags & DTRACE_O_LP64) { 16966ff6d951SJohn Birrell (void) snprintf(drti, sizeof (drti), 16976ff6d951SJohn Birrell "%s/64/drti.o", _dtrace_libdir); 16986ff6d951SJohn Birrell } else { 16996ff6d951SJohn Birrell (void) snprintf(drti, sizeof (drti), 17006ff6d951SJohn Birrell "%s/drti.o", _dtrace_libdir); 17016ff6d951SJohn Birrell } 17026ff6d951SJohn Birrell 17036ff6d951SJohn Birrell len = snprintf(&tmp, 1, fmt, dtp->dt_ld_path, file, fd, 17046ff6d951SJohn Birrell drti) + 1; 17056ff6d951SJohn Birrell 17066ff6d951SJohn Birrell cmd = alloca(len); 17076ff6d951SJohn Birrell 17086ff6d951SJohn Birrell (void) snprintf(cmd, len, fmt, dtp->dt_ld_path, file, fd, drti); 17092693feb4SJohn Birrell #else 17102693feb4SJohn Birrell const char *fmt = "%s -o %s -r %s %s"; 17112693feb4SJohn Birrell 17122693feb4SJohn Birrell #if defined(__amd64__) 17132693feb4SJohn Birrell /* 17142693feb4SJohn Birrell * Arches which default to 64-bit need to explicitly use 17152693feb4SJohn Birrell * the 32-bit library path. 17162693feb4SJohn Birrell */ 17172693feb4SJohn Birrell int use_32 = !(dtp->dt_oflags & DTRACE_O_LP64); 17182693feb4SJohn Birrell #else 17192693feb4SJohn Birrell /* 17202693feb4SJohn Birrell * Arches which are 32-bit only just use the normal 17212693feb4SJohn Birrell * library path. 17222693feb4SJohn Birrell */ 17232693feb4SJohn Birrell #if defined(__i386__) 17242693feb4SJohn Birrell int use_32 = 1; /* use /usr/lib/... -sson */ 17252693feb4SJohn Birrell #else 17262693feb4SJohn Birrell int use_32 = 0; 17272693feb4SJohn Birrell #endif 17282693feb4SJohn Birrell #endif 17292693feb4SJohn Birrell 17302693feb4SJohn Birrell (void) snprintf(drti, sizeof (drti), "/usr/lib%s/dtrace/drti.o", 17312693feb4SJohn Birrell use_32 ? "":"32"); 17322693feb4SJohn Birrell 17332693feb4SJohn Birrell len = snprintf(&tmp, 1, fmt, dtp->dt_ld_path, file, tfile, 17342693feb4SJohn Birrell drti) + 1; 17352693feb4SJohn Birrell 17362693feb4SJohn Birrell cmd = alloca(len); 17372693feb4SJohn Birrell 17382693feb4SJohn Birrell (void) snprintf(cmd, len, fmt, dtp->dt_ld_path, file, tfile, drti); 17392693feb4SJohn Birrell #endif 17406ff6d951SJohn Birrell 17416ff6d951SJohn Birrell if ((status = system(cmd)) == -1) { 17426ff6d951SJohn Birrell ret = dt_link_error(dtp, NULL, -1, NULL, 17436ff6d951SJohn Birrell "failed to run %s: %s", dtp->dt_ld_path, 17446ff6d951SJohn Birrell strerror(errno)); 17456ff6d951SJohn Birrell goto done; 17466ff6d951SJohn Birrell } 17476ff6d951SJohn Birrell 17486ff6d951SJohn Birrell (void) close(fd); /* release temporary file */ 17496ff6d951SJohn Birrell 17506ff6d951SJohn Birrell if (WIFSIGNALED(status)) { 17516ff6d951SJohn Birrell ret = dt_link_error(dtp, NULL, -1, NULL, 17526ff6d951SJohn Birrell "failed to link %s: %s failed due to signal %d", 17536ff6d951SJohn Birrell file, dtp->dt_ld_path, WTERMSIG(status)); 17546ff6d951SJohn Birrell goto done; 17556ff6d951SJohn Birrell } 17566ff6d951SJohn Birrell 17576ff6d951SJohn Birrell if (WEXITSTATUS(status) != 0) { 17586ff6d951SJohn Birrell ret = dt_link_error(dtp, NULL, -1, NULL, 17596ff6d951SJohn Birrell "failed to link %s: %s exited with status %d\n", 17606ff6d951SJohn Birrell file, dtp->dt_ld_path, WEXITSTATUS(status)); 17616ff6d951SJohn Birrell goto done; 17626ff6d951SJohn Birrell } 17636ff6d951SJohn Birrell } else { 17646ff6d951SJohn Birrell (void) close(fd); 17656ff6d951SJohn Birrell } 17666ff6d951SJohn Birrell 17676ff6d951SJohn Birrell done: 17686ff6d951SJohn Birrell dtrace_dof_destroy(dtp, dof); 17692693feb4SJohn Birrell 17702693feb4SJohn Birrell #if !defined(sun) 17712693feb4SJohn Birrell unlink(tfile); 17722693feb4SJohn Birrell #endif 17736ff6d951SJohn Birrell return (ret); 17746ff6d951SJohn Birrell } 1775