/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* * Copyright (c) 1988 AT&T * All Rights Reserved */ /* * Copyright (c) 2018, Joyent, Inc. */ #include #include #include #include #include "decl.h" #include "msg.h" /* * This module is compiled twice, the second time having * -D_ELF64 defined. The following set of macros, along * with machelf.h, represent the differences between the * two compilations. Be careful *not* to add any class- * dependent code (anything that has elf32 or elf64 in the * name) to this code without hiding it behind a switch- * able macro like these. */ #if defined(_ELF64) #define FSZ_LONG ELF64_FSZ_XWORD #define ELFCLASS ELFCLASS64 #define _elf_snode_init _elf64_snode_init #define _elfxx_cookscn _elf64_cookscn #define _elf_upd_lib _elf64_upd_lib #define elf_fsize elf64_fsize #define _elf_entsz _elf64_entsz #define _elf_msize _elf64_msize #define _elf_upd_usr _elf64_upd_usr #define wrt wrt64 #define elf_xlatetof elf64_xlatetof #define _elfxx_update _elf64_update #define _elfxx_swap_wrimage _elf64_swap_wrimage #else /* ELF32 */ #define FSZ_LONG ELF32_FSZ_WORD #define ELFCLASS ELFCLASS32 #define _elf_snode_init _elf32_snode_init #define _elfxx_cookscn _elf32_cookscn #define _elf_upd_lib _elf32_upd_lib #define elf_fsize elf32_fsize #define _elf_entsz _elf32_entsz #define _elf_msize _elf32_msize #define _elf_upd_usr _elf32_upd_usr #define wrt wrt32 #define elf_xlatetof elf32_xlatetof #define _elfxx_update _elf32_update #define _elfxx_swap_wrimage _elf32_swap_wrimage #endif /* ELF64 */ #if !(defined(_LP64) && defined(_ELF64)) #define TEST_SIZE /* * Handle the decision of whether the current linker can handle the * desired object size, and if not, which error to issue. * * Input is the desired size. On failure, an error has been issued * and 0 is returned. On success, 1 is returned. */ static int test_size(Lword hi) { #ifndef _LP64 /* 32-bit linker */ /* * A 32-bit libelf is limited to a 2GB output file. This limit * is due to the fact that off_t is a signed value, and that * libelf cannot support large file support: * - ABI reasons * - Memory use generally is 2x output file size anyway, * so lifting the file size limit will just send * you crashing into the 32-bit VM limit. * If the output is an ELFCLASS64 object, or an ELFCLASS32 object * under 4GB, switching to the 64-bit version of libelf will help. * However, an ELFCLASS32 object must not exceed 4GB. */ if (hi > INT_MAX) { /* Bigger than 2GB */ #ifndef _ELF64 /* ELFCLASS32 object is fundamentally too big? */ if (hi > UINT_MAX) { _elf_seterr(EFMT_FBIG_CLASS32, 0); return (0); } #endif /* _ELF64 */ /* Should switch to the 64-bit libelf? */ _elf_seterr(EFMT_FBIG_LARGEFILE, 0); return (0); } #endif /* !_LP64 */ #if defined(_LP64) && !defined(_ELF64) /* 64-bit linker, ELFCLASS32 */ /* * A 64-bit linker can produce any size output * file, but if the resulting file is ELFCLASS32, * it must not exceed 4GB. */ if (hi > UINT_MAX) { _elf_seterr(EFMT_FBIG_CLASS32, 0); return (0); } #endif return (1); } #endif /* TEST_SIZE */ /* * Output file update * These functions walk an Elf structure, update its information, * and optionally write the output file. Because the application * may control of the output file layout, two upd_... routines * exist. They're similar but too different to merge cleanly. * * The library defines a "dirty" bit to force parts of the file * to be written on update. These routines ignore the dirty bit * and do everything. A minimal update routine might be useful * someday. */ static size_t _elf_upd_lib(Elf * elf) { Lword hi; Lword hibit; Elf_Scn * s; register Lword sz; Ehdr * eh = elf->ed_ehdr; unsigned ver = eh->e_version; register char *p = (char *)eh->e_ident; size_t scncnt; /* * Ehdr and Phdr table go first */ p[EI_MAG0] = ELFMAG0; p[EI_MAG1] = ELFMAG1; p[EI_MAG2] = ELFMAG2; p[EI_MAG3] = ELFMAG3; p[EI_CLASS] = ELFCLASS; /* LINTED */ p[EI_VERSION] = (Byte)ver; hi = elf_fsize(ELF_T_EHDR, 1, ver); /* LINTED */ eh->e_ehsize = (Half)hi; if (eh->e_phnum != 0) { /* LINTED */ eh->e_phentsize = (Half)elf_fsize(ELF_T_PHDR, 1, ver); /* LINTED */ eh->e_phoff = (Off)hi; hi += eh->e_phentsize * eh->e_phnum; } else { eh->e_phoff = 0; eh->e_phentsize = 0; } /* * Obtain the first section header. Typically, this section has NULL * contents, however in the case of Extended ELF Sections this section * is used to hold an alternative e_shnum, e_shstrndx and e_phnum. * On initial allocation (see _elf_snode) the elements of this section * would have been zeroed. The e_shnum is initialized later, after the * section header count has been determined. The e_shstrndx and * e_phnum may have already been initialized by the caller (for example, * gelf_update_shdr() in mcs(1)). */ if ((s = elf->ed_hdscn) == 0) { eh->e_shnum = 0; scncnt = 0; } else { s = s->s_next; scncnt = 1; } /* * Loop through sections. Compute section size before changing hi. * Allow null buffers for NOBITS. */ hibit = 0; for (; s != 0; s = s->s_next) { register Dnode *d; register Lword fsz, j; Shdr *sh = s->s_shdr; scncnt++; if (sh->sh_type == SHT_NULL) { *sh = _elf_snode_init.sb_shdr; continue; } if ((s->s_myflags & SF_READY) == 0) (void) _elfxx_cookscn(s); sh->sh_addralign = 1; if ((sz = (Lword)_elf_entsz(elf, sh->sh_type, ver)) != 0) /* LINTED */ sh->sh_entsize = (Half)sz; sz = 0; for (d = s->s_hdnode; d != 0; d = d->db_next) { if ((fsz = elf_fsize(d->db_data.d_type, 1, ver)) == 0) return (0); j = _elf_msize(d->db_data.d_type, ver); fsz *= (d->db_data.d_size / j); d->db_osz = (size_t)fsz; if ((j = d->db_data.d_align) > 1) { if (j > sh->sh_addralign) sh->sh_addralign = (Xword)j; if (sz % j != 0) sz += j - sz % j; } d->db_data.d_off = (off_t)sz; d->db_xoff = sz; sz += fsz; } sh->sh_size = (Xword) sz; /* * We want to take into account the offsets for NOBITS * sections and let the "sh_offsets" point to where * the section would 'conceptually' fit within * the file (as required by the ABI). * * But - we must also make sure that the NOBITS does * not take up any actual space in the file. We preserve * the actual offset into the file in the 'hibit' variable. * When we come to the first non-NOBITS section after a * encountering a NOBITS section the hi counter is restored * to its proper place in the file. */ if (sh->sh_type == SHT_NOBITS) { if (hibit == 0) hibit = hi; } else { if (hibit) { hi = hibit; hibit = 0; } } j = sh->sh_addralign; if ((fsz = hi % j) != 0) hi += j - fsz; /* LINTED */ sh->sh_offset = (Off)hi; hi += sz; } /* * if last section was a 'NOBITS' section then we need to * restore the 'hi' counter to point to the end of the last * non 'NOBITS' section. */ if (hibit) { hi = hibit; hibit = 0; } /* * Shdr table last */ if (scncnt != 0) { if (hi % FSZ_LONG != 0) hi += FSZ_LONG - hi % FSZ_LONG; /* LINTED */ eh->e_shoff = (Off)hi; /* * If we are using 'extended sections' then the * e_shnum is stored in the sh_size field of the * first section header. * * NOTE: we set e_shnum to '0' because it's specified * this way in the gABI, and in the hopes that * this will cause less problems to unaware * tools then if we'd set it to SHN_XINDEX (0xffff). */ if (scncnt < SHN_LORESERVE) eh->e_shnum = scncnt; else { Shdr *sh; sh = (Shdr *)elf->ed_hdscn->s_shdr; sh->sh_size = scncnt; eh->e_shnum = 0; } /* LINTED */ eh->e_shentsize = (Half)elf_fsize(ELF_T_SHDR, 1, ver); hi += eh->e_shentsize * scncnt; } else { eh->e_shoff = 0; eh->e_shentsize = 0; } #ifdef TEST_SIZE if (test_size(hi) == 0) return (0); #endif return ((size_t)hi); } static size_t _elf_upd_usr(Elf * elf) { Lword hi; Elf_Scn * s; register Lword sz; Ehdr * eh = elf->ed_ehdr; unsigned ver = eh->e_version; register char *p = (char *)eh->e_ident; size_t scncnt; /* * Ehdr and Phdr table go first */ p[EI_MAG0] = ELFMAG0; p[EI_MAG1] = ELFMAG1; p[EI_MAG2] = ELFMAG2; p[EI_MAG3] = ELFMAG3; p[EI_CLASS] = ELFCLASS; /* LINTED */ p[EI_VERSION] = (Byte)ver; hi = elf_fsize(ELF_T_EHDR, 1, ver); /* LINTED */ eh->e_ehsize = (Half)hi; /* * If phnum is zero, phoff "should" be zero too, * but the application is responsible for it. * Allow a non-zero value here and update the * hi water mark accordingly. */ if (eh->e_phnum != 0) /* LINTED */ eh->e_phentsize = (Half)elf_fsize(ELF_T_PHDR, 1, ver); else eh->e_phentsize = 0; if ((sz = eh->e_phoff + eh->e_phentsize * eh->e_phnum) > hi) hi = sz; /* * Loop through sections, skipping index zero. * Compute section size before changing hi. * Allow null buffers for NOBITS. */ if ((s = elf->ed_hdscn) == 0) { eh->e_shnum = 0; scncnt = 0; } else { scncnt = 1; s = s->s_next; } for (; s != 0; s = s->s_next) { register Dnode *d; register Lword fsz, j; Shdr *sh = s->s_shdr; if ((s->s_myflags & SF_READY) == 0) (void) _elfxx_cookscn(s); ++scncnt; sz = 0; for (d = s->s_hdnode; d != 0; d = d->db_next) { if ((fsz = elf_fsize(d->db_data.d_type, 1, ver)) == 0) return (0); j = _elf_msize(d->db_data.d_type, ver); fsz *= (d->db_data.d_size / j); d->db_osz = (size_t)fsz; if ((sh->sh_type != SHT_NOBITS) && ((j = (d->db_data.d_off + d->db_osz)) > sz)) sz = j; } if (sh->sh_size < sz) { _elf_seterr(EFMT_SCNSZ, 0); return (0); } if ((sh->sh_type != SHT_NOBITS) && (hi < sh->sh_offset + sh->sh_size)) hi = sh->sh_offset + sh->sh_size; } /* * Shdr table last. Comment above for phnum/phoff applies here. */ if (scncnt != 0) { /* LINTED */ eh->e_shentsize = (Half)elf_fsize(ELF_T_SHDR, 1, ver); if (scncnt < SHN_LORESERVE) { eh->e_shnum = scncnt; } else { Shdr *sh; sh = (Shdr *)elf->ed_hdscn->s_shdr; sh->sh_size = scncnt; eh->e_shnum = 0; } } else { eh->e_shentsize = 0; } if ((sz = eh->e_shoff + eh->e_shentsize * scncnt) > hi) hi = sz; #ifdef TEST_SIZE if (test_size(hi) == 0) return (0); #endif return ((size_t)hi); } static size_t wrt(Elf * elf, Xword outsz, unsigned fill, int update_cmd) { Elf_Data dst, src; unsigned flag; Xword hi, sz; char *image; Elf_Scn *s; Ehdr *eh = elf->ed_ehdr; unsigned ver = eh->e_version; unsigned encode; int byte; _elf_execfill_func_t *execfill_func; /* * If this is an ELF_C_WRIMAGE write, then we encode into the * byte order of the system we are running on rather than that of * of the object. For ld.so.1, this is the same order, but * for 'ld', it might not be in the case where we are cross * linking an object for a different target. In this later case, * the linker-host byte order is necessary so that the linker can * manipulate the resulting image. It is expected that the linker * will call elf_swap_wrimage() if necessary to convert the image * to the target byte order. */ encode = (update_cmd == ELF_C_WRIMAGE) ? _elf_sys_encoding() : eh->e_ident[EI_DATA]; /* * Two issues can cause trouble for the output file. * First, begin() with ELF_C_RDWR opens a file for both * read and write. On the write update(), the library * has to read everything it needs before truncating * the file. Second, using mmap for both read and write * is too tricky. Consequently, the library disables mmap * on the read side. Using mmap for the output saves swap * space, because that mapping is SHARED, not PRIVATE. * * If the file is write-only, there can be nothing of * interest to bother with. * * The following reads the entire file, which might be * more than necessary. Better safe than sorry. */ if ((elf->ed_myflags & EDF_READ) && (_elf_vm(elf, (size_t)0, elf->ed_fsz) != OK_YES)) return (0); flag = elf->ed_myflags & EDF_WRALLOC; if ((image = _elf_outmap(elf->ed_fd, outsz, &flag)) == 0) return (0); if (flag == 0) elf->ed_myflags |= EDF_IMALLOC; /* * If an error occurs below, a "dirty" bit may be cleared * improperly. To save a second pass through the file, * this code sets the dirty bit on the elf descriptor * when an error happens, assuming that will "cover" any * accidents. */ /* * Hi is needed only when 'fill' is non-zero. * Fill is non-zero only when the library * calculates file/section/data buffer offsets. * The lib guarantees they increase monotonically. * That guarantees proper filling below. */ /* * Ehdr first */ src.d_buf = (Elf_Void *)eh; src.d_type = ELF_T_EHDR; src.d_size = sizeof (Ehdr); src.d_version = EV_CURRENT; dst.d_buf = (Elf_Void *)image; dst.d_size = eh->e_ehsize; dst.d_version = ver; if (elf_xlatetof(&dst, &src, encode) == 0) return (0); elf->ed_ehflags &= ~ELF_F_DIRTY; hi = eh->e_ehsize; /* * Phdr table if one exists */ if (eh->e_phnum != 0) { unsigned work; /* * Unlike other library data, phdr table is * in the user version. Change src buffer * version here, fix it after translation. */ src.d_buf = (Elf_Void *)elf->ed_phdr; src.d_type = ELF_T_PHDR; src.d_size = elf->ed_phdrsz; ELFACCESSDATA(work, _elf_work) src.d_version = work; dst.d_buf = (Elf_Void *)(image + eh->e_phoff); dst.d_size = eh->e_phnum * eh->e_phentsize; hi = (Xword)(eh->e_phoff + dst.d_size); if (elf_xlatetof(&dst, &src, encode) == 0) { elf->ed_uflags |= ELF_F_DIRTY; return (0); } elf->ed_phflags &= ~ELF_F_DIRTY; src.d_version = EV_CURRENT; } /* * Loop through sections */ ELFACCESSDATA(byte, _elf_byte); ELFACCESSDATA(execfill_func, _elf_execfill_func); for (s = elf->ed_hdscn; s != 0; s = s->s_next) { register Dnode *d, *prevd; Xword off = 0; Shdr *sh = s->s_shdr; char *start = image + sh->sh_offset; char *here; _elf_execfill_func_t *execfill; /* Only use the execfill function on SHF_EXECINSTR sections */ execfill = (sh->sh_flags & SHF_EXECINSTR) ? execfill_func : NULL; /* * Just "clean" DIRTY flag for "empty" sections. Even if * NOBITS needs padding, the next thing in the * file will provide it. (And if this NOBITS is * the last thing in the file, no padding needed.) */ if ((sh->sh_type == SHT_NOBITS) || (sh->sh_type == SHT_NULL)) { d = s->s_hdnode, prevd = 0; for (; d != 0; prevd = d, d = d->db_next) d->db_uflags &= ~ELF_F_DIRTY; continue; } /* * Clear out the memory between the end of the last * section and the begining of this section. */ if (fill && (sh->sh_offset > hi)) { sz = sh->sh_offset - hi; (void) memset(start - sz, byte, sz); } for (d = s->s_hdnode, prevd = 0; d != 0; prevd = d, d = d->db_next) { d->db_uflags &= ~ELF_F_DIRTY; here = start + d->db_data.d_off; /* * Clear out the memory between the end of the * last update and the start of this data buffer. * * These buffers represent input sections that have * been concatenated into an output section, so if * the output section is executable (SHF_EXECINSTR) * and a fill function has been registered, use the * function. Otherwise, use the fill byte. */ if (fill && (d->db_data.d_off > off)) { sz = (Xword)(d->db_data.d_off - off); if (execfill != NULL) (* execfill)(start, here - start - sz, sz); else (void) memset(here - sz, byte, sz); } if ((d->db_myflags & DBF_READY) == 0) { SCNLOCK(s); if (_elf_locked_getdata(s, &prevd->db_data) != &d->db_data) { elf->ed_uflags |= ELF_F_DIRTY; SCNUNLOCK(s); return (0); } SCNUNLOCK(s); } dst.d_buf = (Elf_Void *)here; dst.d_size = d->db_osz; /* * Copy the translated bits out to the destination * image. */ if (elf_xlatetof(&dst, &d->db_data, encode) == 0) { elf->ed_uflags |= ELF_F_DIRTY; return (0); } off = (Xword)(d->db_data.d_off + dst.d_size); } hi = sh->sh_offset + sh->sh_size; } /* * Shdr table last */ if (fill && (eh->e_shoff > hi)) { sz = eh->e_shoff - hi; (void) memset(image + hi, byte, sz); } src.d_type = ELF_T_SHDR; src.d_size = sizeof (Shdr); dst.d_buf = (Elf_Void *)(image + eh->e_shoff); dst.d_size = eh->e_shentsize; for (s = elf->ed_hdscn; s != 0; s = s->s_next) { assert((uintptr_t)dst.d_buf < ((uintptr_t)image + outsz)); s->s_shflags &= ~ELF_F_DIRTY; s->s_uflags &= ~ELF_F_DIRTY; src.d_buf = s->s_shdr; if (elf_xlatetof(&dst, &src, encode) == 0) { elf->ed_uflags |= ELF_F_DIRTY; return (0); } dst.d_buf = (char *)dst.d_buf + eh->e_shentsize; } /* * ELF_C_WRIMAGE signifyes that we build the memory image, but * that we do not actually write it to disk. This is used * by ld(1) to build up a full image of an elf file and then * to process the file before it's actually written out to * disk. This saves ld(1) the overhead of having to write * the image out to disk twice. */ if (update_cmd == ELF_C_WRIMAGE) { elf->ed_uflags &= ~ELF_F_DIRTY; elf->ed_wrimage = image; elf->ed_wrimagesz = outsz; return (outsz); } if (_elf_outsync(elf->ed_fd, image, outsz, ((elf->ed_myflags & EDF_IMALLOC) ? 0 : 1)) != 0) { elf->ed_uflags &= ~ELF_F_DIRTY; elf->ed_myflags &= ~EDF_IMALLOC; return (outsz); } elf->ed_uflags |= ELF_F_DIRTY; return (0); } /* * The following is a private interface between the linkers (ld & ld.so.1) * and libelf: * * elf_update(elf, ELF_C_WRIMAGE) * This will cause full image representing the elf file * described by the elf pointer to be built in memory. If the * elf pointer has a valid file descriptor associated with it * we will attempt to build the memory image from mmap()'ed * storage. If the elf descriptor does not have a valid * file descriptor (opened with elf_begin(0, ELF_C_IMAGE, 0)) * then the image will be allocated from dynamic memory (malloc()). * * elf_update() will return the size of the memory image built * when sucessful. * * When a subsequent call to elf_update() with ELF_C_WRITE as * the command is performed it will sync the image created * by ELF_C_WRIMAGE to disk (if fd available) and * free the memory allocated. */ off_t _elfxx_update(Elf * elf, Elf_Cmd cmd) { size_t sz; unsigned u; Ehdr *eh = elf->ed_ehdr; ELFWLOCK(elf) switch (cmd) { default: _elf_seterr(EREQ_UPDATE, 0); ELFUNLOCK(elf) return (-1); case ELF_C_WRIMAGE: if ((elf->ed_myflags & EDF_WRITE) == 0) { _elf_seterr(EREQ_UPDWRT, 0); ELFUNLOCK(elf) return (-1); } break; case ELF_C_WRITE: if ((elf->ed_myflags & EDF_WRITE) == 0) { _elf_seterr(EREQ_UPDWRT, 0); ELFUNLOCK(elf) return (-1); } if (elf->ed_wrimage) { if (elf->ed_myflags & EDF_WRALLOC) { free(elf->ed_wrimage); /* * The size is still returned even * though nothing is actually written * out. This is just to be consistant * with the rest of the interface. */ sz = elf->ed_wrimagesz; elf->ed_wrimage = 0; elf->ed_wrimagesz = 0; ELFUNLOCK(elf); return ((off_t)sz); } sz = _elf_outsync(elf->ed_fd, elf->ed_wrimage, elf->ed_wrimagesz, (elf->ed_myflags & EDF_IMALLOC ? 0 : 1)); elf->ed_myflags &= ~EDF_IMALLOC; elf->ed_wrimage = 0; elf->ed_wrimagesz = 0; ELFUNLOCK(elf); return ((off_t)sz); } /* FALLTHROUGH */ case ELF_C_NULL: break; } if (eh == 0) { _elf_seterr(ESEQ_EHDR, 0); ELFUNLOCK(elf) return (-1); } if ((u = eh->e_version) > EV_CURRENT) { _elf_seterr(EREQ_VER, 0); ELFUNLOCK(elf) return (-1); } if (u == EV_NONE) eh->e_version = EV_CURRENT; if ((u = eh->e_ident[EI_DATA]) == ELFDATANONE) { unsigned encode; ELFACCESSDATA(encode, _elf_encode) if (encode == ELFDATANONE) { _elf_seterr(EREQ_ENCODE, 0); ELFUNLOCK(elf) return (-1); } /* LINTED */ eh->e_ident[EI_DATA] = (Byte)encode; } u = 1; if (elf->ed_uflags & ELF_F_LAYOUT) { sz = _elf_upd_usr(elf); u = 0; } else sz = _elf_upd_lib(elf); if ((sz != 0) && ((cmd == ELF_C_WRITE) || (cmd == ELF_C_WRIMAGE))) sz = wrt(elf, (Xword)sz, u, cmd); if (sz == 0) { ELFUNLOCK(elf) return (-1); } ELFUNLOCK(elf) return ((off_t)sz); } /* * When wrt() processes an ELF_C_WRIMAGE request, the resulting image * gets the byte order (encoding) of the platform running the linker * rather than that of the target host. This allows the linker to modify * the image, prior to flushing it to the output file. This routine * is used to re-translate such an image into the byte order of the * target host. */ int _elfxx_swap_wrimage(Elf *elf) { Elf_Data dst, src; Elf_Scn *s; Ehdr *eh; Half e_phnum; unsigned ver; unsigned encode; /* * Ehdr first */ ELFWLOCK(elf); eh = elf->ed_ehdr; e_phnum = eh->e_phnum; ver = eh->e_version; encode = eh->e_ident[EI_DATA]; src.d_buf = dst.d_buf = (Elf_Void *)eh; src.d_type = dst.d_type = ELF_T_EHDR; src.d_size = dst.d_size = sizeof (Ehdr); src.d_version = dst.d_version = ver; if (elf_xlatetof(&dst, &src, encode) == 0) { ELFUNLOCK(elf); return (1); } /* * Phdr table if one exists */ if (e_phnum != 0) { unsigned work; /* * Unlike other library data, phdr table is * in the user version. */ src.d_buf = dst.d_buf = (Elf_Void *)elf->ed_phdr; src.d_type = dst.d_type = ELF_T_PHDR; src.d_size = dst.d_size = elf->ed_phdrsz; ELFACCESSDATA(work, _elf_work) src.d_version = dst.d_version = work; if (elf_xlatetof(&dst, &src, encode) == 0) { ELFUNLOCK(elf); return (1); } } /* * Loop through sections */ for (s = elf->ed_hdscn; s != 0; s = s->s_next) { register Dnode *d, *prevd; Shdr *sh = s->s_shdr; if ((sh->sh_type == SHT_NOBITS) || (sh->sh_type == SHT_NULL)) continue; for (d = s->s_hdnode, prevd = 0; d != 0; prevd = d, d = d->db_next) { if ((d->db_myflags & DBF_READY) == 0) { SCNLOCK(s); if (_elf_locked_getdata(s, &prevd->db_data) != &d->db_data) { SCNUNLOCK(s); ELFUNLOCK(elf); return (1); } SCNUNLOCK(s); } dst = d->db_data; if (elf_xlatetof(&dst, &d->db_data, encode) == 0) { ELFUNLOCK(elf); return (1); } } } /* * Shdr table */ src.d_type = dst.d_type = ELF_T_SHDR; src.d_version = dst.d_version = ver; for (s = elf->ed_hdscn; s != 0; s = s->s_next) { src.d_buf = dst.d_buf = s->s_shdr; src.d_size = dst.d_size = sizeof (Shdr); if (elf_xlatetof(&dst, &src, encode) == 0) { ELFUNLOCK(elf); return (1); } } ELFUNLOCK(elf); return (0); } #ifndef _ELF64 /* class-independent, only needs to be compiled once */ off_t elf_update(Elf *elf, Elf_Cmd cmd) { if (elf == 0) return (-1); if (elf->ed_class == ELFCLASS32) return (_elf32_update(elf, cmd)); else if (elf->ed_class == ELFCLASS64) { return (_elf64_update(elf, cmd)); } _elf_seterr(EREQ_CLASS, 0); return (-1); } int _elf_swap_wrimage(Elf *elf) { if (elf == 0) return (0); if (elf->ed_class == ELFCLASS32) return (_elf32_swap_wrimage(elf)); if (elf->ed_class == ELFCLASS64) return (_elf64_swap_wrimage(elf)); _elf_seterr(EREQ_CLASS, 0); return (0); } /* * 4106312, 4106398, This is an ad-hoc means for the 32-bit * Elf64 version of libld.so.3 to get around the limitation * of a 32-bit d_off field. This is only intended to be * used by libld to relocate symbols in large NOBITS sections. */ Elf64_Off _elf_getxoff(Elf_Data * d) { return (((Dnode *)d)->db_xoff); } #endif /* !_ELF64 */