16677 ipadm show-addr inconsistently reports if a specified addrobj is missing

[illumos-gate.git] / usr / src / cmd / sgs / libld / common / sections.c

/*
 * 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 (c) 1988 AT&T
 *        All Rights Reserved
 *
 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2022 Oxide Computer Company
 */

/*
 * Module sections. Initialize special sections
 */

#define ELF_TARGET_AMD64

#include        <sys/debug.h>

#include        <string.h>
#include        <strings.h>
#include        <stdio.h>
#include        <link.h>
#include        <debug.h>
#include        "msg.h"
#include        "_libld.h"

inline static void
remove_local(Ofl_desc *ofl, Sym_desc *sdp, int allow_ldynsym)
{
        Sym     *sym = sdp->sd_sym;
        uchar_t type = ELF_ST_TYPE(sym->st_info);
        /* LINTED - only used for assert() */
        int     err;

        if ((ofl->ofl_flags & FLG_OF_REDLSYM) == 0) {
                ofl->ofl_locscnt--;

                err = st_delstring(ofl->ofl_strtab, sdp->sd_name);
                assert(err != -1);

                if (allow_ldynsym && ldynsym_symtype[type]) {
                        ofl->ofl_dynlocscnt--;

                        err = st_delstring(ofl->ofl_dynstrtab, sdp->sd_name);
                        assert(err != -1);
                        /* Remove from sort section? */
                        DYNSORT_COUNT(sdp, sym, type, --);
                }
        }
        sdp->sd_flags |= FLG_SY_ISDISC;
}

inline static void
remove_scoped(Ofl_desc *ofl, Sym_desc *sdp, int allow_ldynsym)
{
        Sym     *sym = sdp->sd_sym;
        uchar_t type = ELF_ST_TYPE(sym->st_info);
        /* LINTED - only used for assert() */
        int     err;

        ofl->ofl_scopecnt--;
        ofl->ofl_elimcnt++;

        err = st_delstring(ofl->ofl_strtab, sdp->sd_name);
        assert(err != -1);

        if (allow_ldynsym && ldynsym_symtype[type]) {
                ofl->ofl_dynscopecnt--;

                err = st_delstring(ofl->ofl_dynstrtab, sdp->sd_name);
                assert(err != -1);
                /* Remove from sort section? */
                DYNSORT_COUNT(sdp, sym, type, --);
        }
        sdp->sd_flags |= FLG_SY_ELIM;
}

inline static void
ignore_sym(Ofl_desc *ofl, Ifl_desc *ifl, Sym_desc *sdp, int allow_ldynsym)
{
        Os_desc *osp;
        Is_desc *isp = sdp->sd_isc;
        uchar_t bind = ELF_ST_BIND(sdp->sd_sym->st_info);

        if (bind == STB_LOCAL) {
                uchar_t type = ELF_ST_TYPE(sdp->sd_sym->st_info);

                /*
                 * Skip section symbols, these were never collected in the
                 * first place.
                 */
                if (type == STT_SECTION)
                        return;

                /*
                 * Determine if the whole file is being removed.  Remove any
                 * file symbol, and any symbol that is not associated with a
                 * section, provided the symbol has not been identified as
                 * (update) required.
                 */
                if (((ifl->ifl_flags & FLG_IF_FILEREF) == 0) &&
                    ((type == STT_FILE) || ((isp == NULL) &&
                    ((sdp->sd_flags & FLG_SY_UPREQD) == 0)))) {
                        DBG_CALL(Dbg_syms_discarded(ofl->ofl_lml, sdp));
                        if (ifl->ifl_flags & FLG_IF_IGNORE)
                                remove_local(ofl, sdp, allow_ldynsym);
                        return;
                }

        } else {
                /*
                 * Global symbols can only be eliminated when the interfaces of
                 * an object have been defined via versioning/scoping.
                 */
                if (!SYM_IS_HIDDEN(sdp))
                        return;

                /*
                 * Remove any unreferenced symbols that are not associated with
                 * a section.
                 */
                if ((isp == NULL) && ((sdp->sd_flags & FLG_SY_UPREQD) == 0)) {
                        DBG_CALL(Dbg_syms_discarded(ofl->ofl_lml, sdp));
                        if (ifl->ifl_flags & FLG_IF_IGNORE)
                                remove_scoped(ofl, sdp, allow_ldynsym);
                        return;
                }
        }

        /*
         * Do not discard any symbols that are associated with non-allocable
         * segments.
         */
        if (isp && ((isp->is_flags & FLG_IS_SECTREF) == 0) &&
            ((osp = isp->is_osdesc) != 0) &&
            (osp->os_sgdesc->sg_phdr.p_type == PT_LOAD)) {
                DBG_CALL(Dbg_syms_discarded(ofl->ofl_lml, sdp));
                if (ifl->ifl_flags & FLG_IF_IGNORE) {
                        if (bind == STB_LOCAL)
                                remove_local(ofl, sdp, allow_ldynsym);
                        else
                                remove_scoped(ofl, sdp, allow_ldynsym);
                }
        }
}

static Boolean
isdesc_discarded(Is_desc *isp)
{
        Ifl_desc        *ifl = isp->is_file;
        Os_desc         *osp = isp->is_osdesc;
        Word            ptype = osp->os_sgdesc->sg_phdr.p_type;

        if (isp->is_flags & FLG_IS_DISCARD)
                return (TRUE);

        /*
         * If the file is discarded, it will take
         * the section with it.
         */
        if (ifl &&
            (((ifl->ifl_flags & FLG_IF_FILEREF) == 0) ||
            ((ptype == PT_LOAD) &&
            ((isp->is_flags & FLG_IS_SECTREF) == 0) &&
            (isp->is_shdr->sh_size > 0))) &&
            (ifl->ifl_flags & FLG_IF_IGNORE))
                return (TRUE);

        return (FALSE);
}

/*
 * There are situations where we may count output sections (ofl_shdrcnt)
 * that are subsequently eliminated from the output object. Whether or
 * not this happens cannot be known until all input has been seen and
 * section elimination code has run. However, the situations where this
 * outcome is possible are known, and are flagged by setting FLG_OF_ADJOSCNT.
 *
 * If FLG_OF_ADJOSCNT is set, this routine makes a pass over the output
 * sections. If an unused output section is encountered, we decrement
 * ofl->ofl_shdrcnt and remove the section name from the .shstrtab string
 * table (ofl->ofl_shdrsttab).
 *
 * This code must be kept in sync with the similar code
 * found in outfile.c:ld_create_outfile().
 */
static void
adjust_os_count(Ofl_desc *ofl)
{
        Sg_desc         *sgp;
        Is_desc         *isp;
        Os_desc         *osp;
        Aliste          idx1;

        if ((ofl->ofl_flags & FLG_OF_ADJOSCNT) == 0)
                return;

        /*
         * For each output section, look at the input sections to find at least
         * one input section that has not been eliminated. If none are found,
         * the -z ignore processing above has eliminated that output section.
         */
        for (APLIST_TRAVERSE(ofl->ofl_segs, idx1, sgp)) {
                Aliste  idx2;

                for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) {
                        Aliste  idx3;
                        int     keep = 0, os_isdescs_idx;

                        OS_ISDESCS_TRAVERSE(os_isdescs_idx, osp, idx3, isp) {
                                /*
                                 * We have found a kept input section,
                                 * so the output section will be created.
                                 */
                                if (!isdesc_discarded(isp)) {
                                        keep = 1;
                                        break;
                                }
                        }
                        /*
                         * If no section of this name was kept, decrement
                         * the count and remove the name from .shstrtab.
                         */
                        if (keep == 0) {
                                /* LINTED - only used for assert() */
                                int err;

                                ofl->ofl_shdrcnt--;
                                err = st_delstring(ofl->ofl_shdrsttab,
                                    osp->os_name);
                                assert(err != -1);
                        }
                }
        }
}

/*
 * If -zignore has been in effect, scan all input files to determine if the
 * file, or sections from the file, have been referenced.  If not, the file or
 * some of the files sections can be discarded. If sections are to be
 * discarded, rescan the output relocations and the symbol table and remove
 * the relocations and symbol entries that are no longer required.
 *
 * Note:  It's possible that a section which is being discarded has contributed
 *        to the GOT table or the PLT table.  However, we can't at this point
 *        eliminate the corresponding entries.  This is because there could well
 *        be other sections referencing those same entries, but we don't have
 *        the infrastructure to determine this.  So, keep the PLT and GOT
 *        entries in the table in case someone wants them.
 * Note:  The section to be affected needs to be allocatable.
 *        So even if -zignore is in effect, if the section is not allocatable,
 *        we do not eliminate it.
 */
static uintptr_t
ignore_section_processing(Ofl_desc *ofl)
{
        Sg_desc         *sgp;
        Is_desc         *isp;
        Os_desc         *osp;
        Ifl_desc        *ifl;
        Rel_cachebuf    *rcbp;
        Rel_desc        *rsp;
        int             allow_ldynsym = OFL_ALLOW_LDYNSYM(ofl);
        Aliste          idx1;

        for (APLIST_TRAVERSE(ofl->ofl_objs, idx1, ifl)) {
                uint_t  num, discard;

                /*
                 * Diagnose (-D unused) a completely unreferenced file.
                 */
                if ((ifl->ifl_flags & FLG_IF_FILEREF) == 0)
                        DBG_CALL(Dbg_unused_file(ofl->ofl_lml,
                            ifl->ifl_name, 0, 0));
                if (((ofl->ofl_flags1 & FLG_OF1_IGNPRC) == 0) ||
                    ((ifl->ifl_flags & FLG_IF_IGNORE) == 0))
                        continue;

                /*
                 * Before scanning the whole symbol table to determine if
                 * symbols should be discard - quickly (relatively) scan the
                 * sections to determine if any are to be discarded.
                 */
                discard = 0;
                if (ifl->ifl_flags & FLG_IF_FILEREF) {
                        for (num = 1; num < ifl->ifl_shnum; num++) {
                                if (((isp = ifl->ifl_isdesc[num]) != NULL) &&
                                    ((isp->is_flags & FLG_IS_SECTREF) == 0) &&
                                    ((osp = isp->is_osdesc) != NULL) &&
                                    ((sgp = osp->os_sgdesc) != NULL) &&
                                    (sgp->sg_phdr.p_type == PT_LOAD)) {
                                        discard++;
                                        break;
                                }
                        }
                }

                /*
                 * No sections are to be 'ignored'
                 */
                if ((discard == 0) && (ifl->ifl_flags & FLG_IF_FILEREF))
                        continue;

                /*
                 * We know that we have discarded sections.  Scan the symbol
                 * table for this file to determine if symbols need to be
                 * discarded that are associated with the 'ignored' sections.
                 */
                for (num = 1; num < ifl->ifl_symscnt; num++) {
                        Sym_desc        *sdp;

                        /*
                         * If the symbol definition has been resolved to another
                         * file, or the symbol has already been discarded or
                         * eliminated, skip it.
                         */
                        sdp = ifl->ifl_oldndx[num];
                        if ((sdp->sd_file != ifl) ||
                            (sdp->sd_flags &
                            (FLG_SY_ISDISC | FLG_SY_INVALID | FLG_SY_ELIM)))
                                continue;

                        /*
                         * Complete the investigation of the symbol.
                         */
                        ignore_sym(ofl, ifl, sdp, allow_ldynsym);
                }
        }

        /*
         * If we were only here to solicit debugging diagnostics, we're done.
         */
        if ((ofl->ofl_flags1 & FLG_OF1_IGNPRC) == 0)
                return (1);

        /*
         * Scan all output relocations searching for those against discarded or
         * ignored sections.  If one is found, decrement the total outrel count.
         */
        REL_CACHE_TRAVERSE(&ofl->ofl_outrels, idx1, rcbp, rsp) {
                Is_desc         *isc = rsp->rel_isdesc;
                uint_t          flags, entsize;
                Shdr            *shdr;

                if ((isc == NULL) || ((isc->is_flags & (FLG_IS_SECTREF))) ||
                    ((ifl = isc->is_file) == NULL) ||
                    ((ifl->ifl_flags & FLG_IF_IGNORE) == 0) ||
                    ((shdr = isc->is_shdr) == NULL) ||
                    ((shdr->sh_flags & SHF_ALLOC) == 0))
                        continue;

                flags = rsp->rel_flags;

                if (flags & (FLG_REL_GOT | FLG_REL_BSS |
                    FLG_REL_NOINFO | FLG_REL_PLT))
                        continue;

                osp = RELAUX_GET_OSDESC(rsp);

                if (rsp->rel_flags & FLG_REL_RELA)
                        entsize = sizeof (Rela);
                else
                        entsize = sizeof (Rel);

                assert(osp->os_szoutrels > 0);
                osp->os_szoutrels -= entsize;

                if (!(flags & FLG_REL_PLT))
                        ofl->ofl_reloccntsub++;

                if (rsp->rel_rtype == ld_targ.t_m.m_r_relative)
                        ofl->ofl_relocrelcnt--;
        }

        /*
         * As a result of our work here, the number of output sections may
         * have decreased. Trigger a call to adjust_os_count().
         */
        ofl->ofl_flags |= FLG_OF_ADJOSCNT;

        return (1);
}

/*
 * Allocate Elf_Data, Shdr, and Is_desc structures for a new
 * section.
 *
 * entry:
 *      ofl - Output file descriptor
 *      shtype - SHT_ type code for section.
 *      shname - String giving the name for the new section.
 *      entcnt - # of items contained in the data part of the new section.
 *              This value is multiplied against the known element size
 *              for the section type to determine the size of the data
 *              area for the section. It is only meaningful in cases where
 *              the section type has a non-zero element size. In other cases,
 *              the caller must set the size fields in the *ret_data and
 *              *ret_shdr structs manually.
 *      ret_isec, ret_shdr, ret_data - Address of pointers to
 *              receive address of newly allocated structs.
 *
 * exit:
 *      On error, returns S_ERROR. On success, returns (1), and the
 *      ret_ pointers have been updated to point at the new structures,
 *      which have been filled in. To finish the task, the caller must
 *      update any fields within the supplied descriptors that differ
 *      from its needs, and then call ld_place_section().
 */
static uintptr_t
new_section(Ofl_desc *ofl, Word shtype, const char *shname, Xword entcnt,
    Is_desc **ret_isec, Shdr **ret_shdr, Elf_Data **ret_data)
{
        typedef struct sec_info {
                Word d_type;
                Word align;     /* Used in both data and section header */
                Word sh_flags;
                Word sh_entsize;
        } SEC_INFO_T;

        const SEC_INFO_T        *sec_info;

        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        size_t          size;

        /*
         * For each type of section, we have a distinct set of
         * SEC_INFO_T values. This macro defines a static structure
         * containing those values and generates code to set the sec_info
         * pointer to refer to it. The pointer in sec_info remains valid
         * outside of the declaration scope because the info_s struct is static.
         *
         * We can't determine the value of M_WORD_ALIGN at compile time, so
         * a different variant is used for those cases.
         */
#define SET_SEC_INFO(d_type, d_align, sh_flags, sh_entsize) \
        { \
                static const SEC_INFO_T info_s = { d_type, d_align, sh_flags, \
                    sh_entsize}; \
                sec_info = &info_s; \
        }
#define SET_SEC_INFO_WORD_ALIGN(d_type, sh_flags, sh_entsize) \
        { \
                static SEC_INFO_T info_s = { d_type, 0, sh_flags, \
                    sh_entsize}; \
                info_s.align = ld_targ.t_m.m_word_align; \
                sec_info = &info_s; \
        }

        switch (shtype) {
        case SHT_PROGBITS:
                /*
                 * SHT_PROGBITS sections contain are used for many
                 * different sections. Alignments and flags differ.
                 * Some have a standard entsize, and others don't.
                 * We set some defaults here, but there is no expectation
                 * that they are correct or complete for any specific
                 * purpose. The caller must provide the correct values.
                 */
                SET_SEC_INFO_WORD_ALIGN(ELF_T_BYTE, SHF_ALLOC, 0)
                break;

        case SHT_SYMTAB:
                SET_SEC_INFO_WORD_ALIGN(ELF_T_SYM, 0, sizeof (Sym))
                break;

        case SHT_DYNSYM:
                SET_SEC_INFO_WORD_ALIGN(ELF_T_SYM, SHF_ALLOC, sizeof (Sym))
                break;

        case SHT_SUNW_LDYNSYM:
                ofl->ofl_flags |= FLG_OF_OSABI;
                SET_SEC_INFO_WORD_ALIGN(ELF_T_SYM, SHF_ALLOC, sizeof (Sym))
                break;

        case SHT_STRTAB:
                /*
                 * A string table may or may not be allocable, depending
                 * on context, so we leave that flag unset and leave it to
                 * the caller to add it if necessary.
                 *
                 * String tables do not have a standard entsize, so
                 * we set it to 0.
                 */
                SET_SEC_INFO(ELF_T_BYTE, 1, SHF_STRINGS, 0)
                break;

        case SHT_RELA:
                /*
                 * Relocations with an addend (Everything except 32-bit X86).
                 * The caller is expected to set all section header flags.
                 */
                SET_SEC_INFO_WORD_ALIGN(ELF_T_RELA, 0, sizeof (Rela))
                break;

        case SHT_REL:
                /*
                 * Relocations without an addend (32-bit X86 only).
                 * The caller is expected to set all section header flags.
                 */
                SET_SEC_INFO_WORD_ALIGN(ELF_T_REL, 0, sizeof (Rel))
                break;

        case SHT_HASH:
                SET_SEC_INFO_WORD_ALIGN(ELF_T_WORD, SHF_ALLOC, sizeof (Word))
                break;

        case SHT_SUNW_symsort:
        case SHT_SUNW_tlssort:
                ofl->ofl_flags |= FLG_OF_OSABI;
                SET_SEC_INFO_WORD_ALIGN(ELF_T_WORD, SHF_ALLOC, sizeof (Word))
                break;

        case SHT_DYNAMIC:
                /*
                 * A dynamic section may or may not be allocable, and may or
                 * may not be writable, depending on context, so we leave the
                 * flags unset and leave it to the caller to add them if
                 * necessary.
                 */
                SET_SEC_INFO_WORD_ALIGN(ELF_T_DYN, 0, sizeof (Dyn))
                break;

        case SHT_NOBITS:
                /*
                 * SHT_NOBITS is used for BSS-type sections. The size and
                 * alignment depend on the specific use and must be adjusted
                 * by the caller.
                 */
                SET_SEC_INFO(ELF_T_BYTE, 0, SHF_ALLOC | SHF_WRITE, 0)
                break;

        case SHT_INIT_ARRAY:
        case SHT_FINI_ARRAY:
        case SHT_PREINIT_ARRAY:
                SET_SEC_INFO(ELF_T_ADDR, sizeof (Addr), SHF_ALLOC | SHF_WRITE,
                    sizeof (Addr))
                break;

        case SHT_SYMTAB_SHNDX:
                /*
                 * Note that these sections are created to be associated
                 * with both symtab and dynsym symbol tables. However, they
                 * are non-allocable in all cases, because the runtime
                 * linker has no need for this information. It is purely
                 * informational, used by elfdump(1), debuggers, etc.
                 */
                SET_SEC_INFO_WORD_ALIGN(ELF_T_WORD, 0, sizeof (Word));
                break;

        case SHT_SUNW_cap:
                ofl->ofl_flags |= FLG_OF_OSABI;
                SET_SEC_INFO_WORD_ALIGN(ELF_T_CAP, SHF_ALLOC, sizeof (Cap));
                break;

        case SHT_SUNW_capchain:
                ofl->ofl_flags |= FLG_OF_OSABI;
                SET_SEC_INFO_WORD_ALIGN(ELF_T_WORD, SHF_ALLOC,
                    sizeof (Capchain));
                break;

        case SHT_SUNW_capinfo:
                ofl->ofl_flags |= FLG_OF_OSABI;
#if     _ELF64
                SET_SEC_INFO(ELF_T_XWORD, sizeof (Xword), SHF_ALLOC,
                    sizeof (Capinfo));
#else
                SET_SEC_INFO(ELF_T_WORD, sizeof (Word), SHF_ALLOC,
                    sizeof (Capinfo));
#endif
                break;

        case SHT_SUNW_move:
                ofl->ofl_flags |= FLG_OF_OSABI;
                SET_SEC_INFO(ELF_T_BYTE, sizeof (Lword),
                    SHF_ALLOC | SHF_WRITE, sizeof (Move));
                break;

        case SHT_SUNW_syminfo:
                ofl->ofl_flags |= FLG_OF_OSABI;
                /*
                 * The sh_info field of the SHT_*_syminfo section points
                 * to the header index of the associated .dynamic section,
                 * so we also set SHF_INFO_LINK.
                 */
                SET_SEC_INFO_WORD_ALIGN(ELF_T_BYTE,
                    SHF_ALLOC | SHF_INFO_LINK, sizeof (Syminfo));
                break;

        case SHT_SUNW_verneed:
        case SHT_SUNW_verdef:
                ofl->ofl_flags |= FLG_OF_OSABI;
                /*
                 * The info for verneed and versym happen to be the same.
                 * The entries in these sections are not of uniform size,
                 * so we set the entsize to 0.
                 */
                SET_SEC_INFO_WORD_ALIGN(ELF_T_BYTE, SHF_ALLOC, 0);
                break;

        case SHT_SUNW_versym:
                ofl->ofl_flags |= FLG_OF_OSABI;
                SET_SEC_INFO_WORD_ALIGN(ELF_T_BYTE, SHF_ALLOC,
                    sizeof (Versym));
                break;

        default:
                /* Should not happen: fcn called with unknown section type */
                assert(0);
                return (S_ERROR);
        }
#undef  SET_SEC_INFO
#undef  SET_SEC_INFO_WORD_ALIGN

        size = entcnt * sec_info->sh_entsize;

        /*
         * Allocate and initialize the Elf_Data structure.
         */
        if ((data = libld_calloc(1, sizeof (Elf_Data))) == NULL)
                return (S_ERROR);
        data->d_type = sec_info->d_type;
        data->d_size = size;
        data->d_align = sec_info->align;
        data->d_version = ofl->ofl_dehdr->e_version;

        /*
         * Allocate and initialize the Shdr structure.
         */
        if ((shdr = libld_calloc(1, sizeof (Shdr))) == NULL)
                return (S_ERROR);
        shdr->sh_type = shtype;
        shdr->sh_size = size;
        shdr->sh_flags = sec_info->sh_flags;
        shdr->sh_addralign = sec_info->align;
        shdr->sh_entsize = sec_info->sh_entsize;

        /*
         * Allocate and initialize the Is_desc structure.
         */
        if ((isec = libld_calloc(1, sizeof (Is_desc))) == NULL)
                return (S_ERROR);
        isec->is_name = shname;
        isec->is_shdr = shdr;
        isec->is_indata = data;


        *ret_isec = isec;
        *ret_shdr = shdr;
        *ret_data = data;
        return (1);
}

/*
 * Use an existing input section as a template to create a new
 * input section with the same values as the original, other than
 * the size of the data area which is supplied by the caller.
 *
 * entry:
 *      ofl - Output file descriptor
 *      ifl - Input file section to use as a template
 *      size - Size of data area for new section
 *      ret_isec, ret_shdr, ret_data - Address of pointers to
 *              receive address of newly allocated structs.
 *
 * exit:
 *      On error, returns S_ERROR. On success, returns (1), and the
 *      ret_ pointers have been updated to point at the new structures,
 *      which have been filled in. To finish the task, the caller must
 *      update any fields within the supplied descriptors that differ
 *      from its needs, and then call ld_place_section().
 */
static uintptr_t
new_section_from_template(Ofl_desc *ofl, Is_desc *tmpl_isp, size_t size,
    Is_desc **ret_isec, Shdr **ret_shdr, Elf_Data **ret_data)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;

        /*
         * Allocate and initialize the Elf_Data structure.
         */
        if ((data = libld_calloc(1, sizeof (Elf_Data))) == NULL)
                return (S_ERROR);
        data->d_type = tmpl_isp->is_indata->d_type;
        data->d_size = size;
        data->d_align = tmpl_isp->is_shdr->sh_addralign;
        data->d_version = ofl->ofl_dehdr->e_version;

        /*
         * Allocate and initialize the Shdr structure.
         */
        if ((shdr = libld_malloc(sizeof (Shdr))) == NULL)
                return (S_ERROR);
        *shdr = *tmpl_isp->is_shdr;
        shdr->sh_addr = 0;
        shdr->sh_offset = 0;
        shdr->sh_size = size;

        /*
         * Allocate and initialize the Is_desc structure.
         */
        if ((isec = libld_calloc(1, sizeof (Is_desc))) == NULL)
                return (S_ERROR);
        isec->is_name = tmpl_isp->is_name;
        isec->is_shdr = shdr;
        isec->is_indata = data;


        *ret_isec = isec;
        *ret_shdr = shdr;
        *ret_data = data;
        return (1);
}

/*
 * Build a .bss section for allocation of tentative definitions.  Any `static'
 * .bss definitions would have been associated to their own .bss sections and
 * thus collected from the input files.  `global' .bss definitions are tagged
 * as COMMON and do not cause any associated .bss section elements to be
 * generated.  Here we add up all these COMMON symbols and generate the .bss
 * section required to represent them.
 */
uintptr_t
ld_make_bss(Ofl_desc *ofl, Xword size, Xword align, uint_t ident)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        Os_desc         *osp;
        Xword           rsize = (Xword)ofl->ofl_relocbsssz;

        /*
         * Allocate header structs. We will set the name ourselves below,
         * and there is no entcnt for a BSS. So, the shname and entcnt
         * arguments are 0.
         */
        if (new_section(ofl, SHT_NOBITS, NULL, 0,
            &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        data->d_size = (size_t)size;
        data->d_align = (size_t)align;

        shdr->sh_size = size;
        shdr->sh_addralign = align;

        if (ident == ld_targ.t_id.id_tlsbss) {
                isec->is_name = MSG_ORIG(MSG_SCN_TBSS);
                ofl->ofl_istlsbss = isec;
                shdr->sh_flags |= SHF_TLS;

        } else if (ident == ld_targ.t_id.id_bss) {
                isec->is_name = MSG_ORIG(MSG_SCN_BSS);
                ofl->ofl_isbss = isec;

#if     defined(_ELF64)
        } else if ((ld_targ.t_m.m_mach == EM_AMD64) &&
            (ident == ld_targ.t_id.id_lbss)) {
                isec->is_name = MSG_ORIG(MSG_SCN_LBSS);
                ofl->ofl_islbss = isec;
                shdr->sh_flags |= SHF_AMD64_LARGE;
#endif
        }

        /*
         * Retain this .*bss input section as this will be where global symbol
         * references are added.
         */
        if ((osp = ld_place_section(ofl, isec, NULL, ident, NULL)) ==
            (Os_desc *)S_ERROR)
                return (S_ERROR);

        /*
         * If relocations exist against a .*bss section, a section symbol must
         * be created for the section in the .dynsym symbol table.
         */
        if (!(osp->os_flags & FLG_OS_OUTREL)) {
                ofl_flag_t      flagtotest;

                if (ident == ld_targ.t_id.id_tlsbss)
                        flagtotest = FLG_OF1_TLSOREL;
                else
                        flagtotest = FLG_OF1_BSSOREL;

                if (ofl->ofl_flags1 & flagtotest) {
                        ofl->ofl_dynshdrcnt++;
                        osp->os_flags |= FLG_OS_OUTREL;
                }
        }

        osp->os_szoutrels = rsize;
        return (1);
}

/*
 * Build a SHT_{INIT|FINI|PREINIT}ARRAY section (specified via
 * ld -z *array=name).
 */
static uintptr_t
make_array(Ofl_desc *ofl, Word shtype, const char *sectname, APlist *alp)
{
        uint_t          entcount;
        Aliste          idx;
        Elf_Data        *data;
        Is_desc         *isec;
        Shdr            *shdr;
        Sym_desc        *sdp;
        Rel_desc        reld;
        Rela            reloc;
        Os_desc         *osp;
        uintptr_t       ret = 1;

        if (alp == NULL)
                return (1);

        entcount = 0;
        for (APLIST_TRAVERSE(alp, idx, sdp))
                entcount++;

        if (new_section(ofl, shtype, sectname, entcount, &isec, &shdr, &data) ==
            S_ERROR)
                return (S_ERROR);

        if ((data->d_buf = libld_calloc(entcount, sizeof (Addr))) == NULL)
                return (S_ERROR);

        if (ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_array, NULL) ==
            (Os_desc *)S_ERROR)
                return (S_ERROR);

        osp = isec->is_osdesc;

        if ((ofl->ofl_osinitarray == NULL) && (shtype == SHT_INIT_ARRAY))
                ofl->ofl_osinitarray = osp;
        if ((ofl->ofl_ospreinitarray == NULL) && (shtype == SHT_PREINIT_ARRAY))
                ofl->ofl_ospreinitarray = osp;
        else if ((ofl->ofl_osfiniarray == NULL) && (shtype == SHT_FINI_ARRAY))
                ofl->ofl_osfiniarray = osp;

        /*
         * Create relocations against this section to initialize it to the
         * function addresses.
         */
        reld.rel_isdesc = isec;
        reld.rel_aux = NULL;
        reld.rel_flags = FLG_REL_LOAD;

        /*
         * Fabricate the relocation information (as if a relocation record had
         * been input - see init_rel()).
         */
        reld.rel_rtype = ld_targ.t_m.m_r_arrayaddr;
        reld.rel_roffset = 0;
        reld.rel_raddend = 0;

        /*
         * Create a minimal relocation record to satisfy process_sym_reloc()
         * debugging requirements.
         */
        reloc.r_offset = 0;
        reloc.r_info = ELF_R_INFO(0, ld_targ.t_m.m_r_arrayaddr);
        reloc.r_addend = 0;

        DBG_CALL(Dbg_reloc_generate(ofl->ofl_lml, osp,
            ld_targ.t_m.m_rel_sht_type));
        for (APLIST_TRAVERSE(alp, idx, sdp)) {
                reld.rel_sym = sdp;

                if (ld_process_sym_reloc(ofl, &reld, (Rel *)&reloc, isec,
                    MSG_INTL(MSG_STR_COMMAND), 0) == S_ERROR) {
                        ret = S_ERROR;
                        continue;
                }

                reld.rel_roffset += (Xword)sizeof (Addr);
                reloc.r_offset = reld.rel_roffset;
        }

        return (ret);
}

/*
 * Build a comment section (-Qy option).
 */
static uintptr_t
make_comment(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;

        if (new_section(ofl, SHT_PROGBITS, MSG_ORIG(MSG_SCN_COMMENT), 0,
            &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        data->d_buf = (void *)ofl->ofl_sgsid;
        data->d_size = strlen(ofl->ofl_sgsid) + 1;
        data->d_align = 1;

        shdr->sh_size = (Xword)data->d_size;
        shdr->sh_flags = 0;
        shdr->sh_addralign = 1;

        return ((uintptr_t)ld_place_section(ofl, isec, NULL,
            ld_targ.t_id.id_note, NULL));
}

/*
 * Make the dynamic section.  Calculate the size of any strings referenced
 * within this structure, they will be added to the global string table
 * (.dynstr).  This routine should be called before make_dynstr().
 *
 * This routine must be maintained in parallel with update_odynamic()
 * in update.c
 */
static uintptr_t
make_dynamic(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Os_desc         *osp;
        Elf_Data        *data;
        Is_desc         *isec;
        size_t          cnt = 0;
        Aliste          idx;
        Ifl_desc        *ifl;
        Sym_desc        *sdp;
        size_t          size;
        Str_tbl         *strtbl;
        ofl_flag_t      flags = ofl->ofl_flags;
        int             not_relobj = !(flags & FLG_OF_RELOBJ);
        int             unused = 0;

        /*
         * Select the required string table.
         */
        if (OFL_IS_STATIC_OBJ(ofl))
                strtbl = ofl->ofl_strtab;
        else
                strtbl = ofl->ofl_dynstrtab;

        /*
         * Only a limited subset of DT_ entries apply to relocatable
         * objects. See the comment at the head of update_odynamic() in
         * update.c for details.
         */
        if (new_section(ofl, SHT_DYNAMIC, MSG_ORIG(MSG_SCN_DYNAMIC), 0,
            &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        /*
         * new_section() does not set SHF_ALLOC.  If we're building anything
         * besides a relocatable object, then the .dynamic section should
         * reside in allocatable memory.
         */
        if (not_relobj)
                shdr->sh_flags |= SHF_ALLOC;

        /*
         * new_section() does not set SHF_WRITE.  If we're building an object
         * that specifies an interpretor, then a DT_DEBUG entry is created,
         * which is initialized to the applications link-map list at runtime.
         */
        if (ofl->ofl_osinterp)
                shdr->sh_flags |= SHF_WRITE;

        osp = ofl->ofl_osdynamic =
            ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_dynamic, NULL);

        /*
         * Reserve entries for any needed dependencies.
         */
        for (APLIST_TRAVERSE(ofl->ofl_sos, idx, ifl)) {
                if (!(ifl->ifl_flags & (FLG_IF_NEEDED | FLG_IF_NEEDSTR)))
                        continue;

                /*
                 * If this dependency didn't satisfy any symbol references,
                 * generate a debugging diagnostic (ld(1) -Dunused can be used
                 * to display these).  If this is a standard needed dependency,
                 * and -z ignore is in effect, drop the dependency.  Explicitly
                 * defined dependencies (i.e., -N dep) don't get dropped, and
                 * are flagged as being required to simplify update_odynamic()
                 * processing.
                 */
                if ((ifl->ifl_flags & FLG_IF_NEEDSTR) ||
                    ((ifl->ifl_flags & FLG_IF_DEPREQD) == 0)) {
                        if (unused++ == 0)
                                DBG_CALL(Dbg_util_nl(ofl->ofl_lml, DBG_NL_STD));
                        DBG_CALL(Dbg_unused_file(ofl->ofl_lml, ifl->ifl_soname,
                            (ifl->ifl_flags & FLG_IF_NEEDSTR), 0));

                        /*
                         * Guidance: Remove unused dependency.
                         *
                         * If -z ignore is in effect, this warning is not
                         * needed because we will quietly remove the unused
                         * dependency.
                         */
                        if (OFL_GUIDANCE(ofl, FLG_OFG_NO_UNUSED) &&
                            ((ifl->ifl_flags & FLG_IF_IGNORE) == 0))
                                ld_eprintf(ofl, ERR_GUIDANCE,
                                    MSG_INTL(MSG_GUIDE_UNUSED),
                                    ifl->ifl_soname);

                        if (ifl->ifl_flags & FLG_IF_NEEDSTR)
                                ifl->ifl_flags |= FLG_IF_DEPREQD;
                        else if (ifl->ifl_flags & FLG_IF_IGNORE)
                                continue;
                }

                /*
                 * If this object requires a DT_POSFLAG_1 entry, reserve it.
                 */
                if ((ifl->ifl_flags & MSK_IF_POSFLAG1) && not_relobj)
                        cnt++;

                if (st_insert(strtbl, ifl->ifl_soname) == -1)
                        return (S_ERROR);
                cnt++;

                /*
                 * If the needed entry contains the $ORIGIN token make sure
                 * the associated DT_1_FLAGS entry is created.
                 */
                if (strstr(ifl->ifl_soname, MSG_ORIG(MSG_STR_ORIGIN))) {
                        ofl->ofl_dtflags_1 |= DF_1_ORIGIN;
                        ofl->ofl_dtflags |= DF_ORIGIN;
                }
        }

        if (unused)
                DBG_CALL(Dbg_util_nl(ofl->ofl_lml, DBG_NL_STD));

        if (not_relobj) {
                /*
                 * Reserve entries for any per-symbol auxiliary/filter strings.
                 */
                cnt += alist_nitems(ofl->ofl_dtsfltrs);

                /*
                 * Reserve entries for _init() and _fini() section addresses.
                 */
                if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_INIT_U),
                    SYM_NOHASH, NULL, ofl)) != NULL) &&
                    (sdp->sd_ref == REF_REL_NEED) &&
                    (sdp->sd_sym->st_shndx != SHN_UNDEF)) {
                        sdp->sd_flags |= FLG_SY_UPREQD;
                        cnt++;
                }
                if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_FINI_U),
                    SYM_NOHASH, NULL, ofl)) != NULL) &&
                    (sdp->sd_ref == REF_REL_NEED) &&
                    (sdp->sd_sym->st_shndx != SHN_UNDEF)) {
                        sdp->sd_flags |= FLG_SY_UPREQD;
                        cnt++;
                }

                /*
                 * Reserve entries for any soname, filter name (shared libs
                 * only), run-path pointers, cache names and audit requirements.
                 */
                if (ofl->ofl_soname) {
                        cnt++;
                        if (st_insert(strtbl, ofl->ofl_soname) == -1)
                                return (S_ERROR);
                }
                if (ofl->ofl_filtees) {
                        cnt++;
                        if (st_insert(strtbl, ofl->ofl_filtees) == -1)
                                return (S_ERROR);

                        /*
                         * If the filtees entry contains the $ORIGIN token
                         * make sure the associated DT_1_FLAGS entry is created.
                         */
                        if (strstr(ofl->ofl_filtees,
                            MSG_ORIG(MSG_STR_ORIGIN))) {
                                ofl->ofl_dtflags_1 |= DF_1_ORIGIN;
                                ofl->ofl_dtflags |= DF_ORIGIN;
                        }
                }
        }

        if (ofl->ofl_rpath) {
                cnt += 2;       /* DT_RPATH & DT_RUNPATH */
                if (st_insert(strtbl, ofl->ofl_rpath) == -1)
                        return (S_ERROR);

                /*
                 * If the rpath entry contains the $ORIGIN token make sure
                 * the associated DT_1_FLAGS entry is created.
                 */
                if (strstr(ofl->ofl_rpath, MSG_ORIG(MSG_STR_ORIGIN))) {
                        ofl->ofl_dtflags_1 |= DF_1_ORIGIN;
                        ofl->ofl_dtflags |= DF_ORIGIN;
                }
        }

        if (not_relobj) {
                Aliste  idx;
                Sg_desc *sgp;

                if (ofl->ofl_config) {
                        cnt++;
                        if (st_insert(strtbl, ofl->ofl_config) == -1)
                                return (S_ERROR);

                        /*
                         * If the config entry contains the $ORIGIN token
                         * make sure the associated DT_1_FLAGS entry is created.
                         */
                        if (strstr(ofl->ofl_config, MSG_ORIG(MSG_STR_ORIGIN))) {
                                ofl->ofl_dtflags_1 |= DF_1_ORIGIN;
                                ofl->ofl_dtflags |= DF_ORIGIN;
                        }
                }
                if (ofl->ofl_depaudit) {
                        cnt++;
                        if (st_insert(strtbl, ofl->ofl_depaudit) == -1)
                                return (S_ERROR);
                }
                if (ofl->ofl_audit) {
                        cnt++;
                        if (st_insert(strtbl, ofl->ofl_audit) == -1)
                                return (S_ERROR);
                }

                /*
                 * Reserve entries for the DT_HASH, DT_STRTAB, DT_STRSZ,
                 * DT_SYMTAB, DT_SYMENT, and DT_CHECKSUM.
                 */
                cnt += 6;

                /*
                 * If we are including local functions at the head of
                 * the dynsym, then also reserve entries for DT_SUNW_SYMTAB
                 * and DT_SUNW_SYMSZ.
                 */
                if (OFL_ALLOW_LDYNSYM(ofl))
                        cnt += 2;

                if ((ofl->ofl_dynsymsortcnt > 0) ||
                    (ofl->ofl_dyntlssortcnt > 0))
                        cnt++;          /* DT_SUNW_SORTENT */

                if (ofl->ofl_dynsymsortcnt > 0)
                        cnt += 2;       /* DT_SUNW_[SYMSORT|SYMSORTSZ] */

                if (ofl->ofl_dyntlssortcnt > 0)
                        cnt += 2;       /* DT_SUNW_[TLSSORT|TLSSORTSZ] */

                if ((flags & (FLG_OF_VERDEF | FLG_OF_NOVERSEC)) ==
                    FLG_OF_VERDEF)
                        cnt += 2;               /* DT_VERDEF & DT_VERDEFNUM */

                if ((flags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) ==
                    FLG_OF_VERNEED)
                        cnt += 2;               /* DT_VERNEED & DT_VERNEEDNUM */

                if ((flags & FLG_OF_COMREL) && ofl->ofl_relocrelcnt)
                        cnt++;                  /* DT_RELACOUNT */

                if (flags & FLG_OF_TEXTREL)     /* DT_TEXTREL */
                        cnt++;

                if (ofl->ofl_osfiniarray)       /* DT_FINI_ARRAY */
                        cnt += 2;               /*    DT_FINI_ARRAYSZ */

                if (ofl->ofl_osinitarray)       /* DT_INIT_ARRAY */
                        cnt += 2;               /*    DT_INIT_ARRAYSZ */

                if (ofl->ofl_ospreinitarray)    /* DT_PREINIT_ARRAY & */
                        cnt += 2;               /*    DT_PREINIT_ARRAYSZ */

                /*
                 * If we have plt's reserve a DT_PLTRELSZ, DT_PLTREL and
                 * DT_JMPREL.
                 */
                if (ofl->ofl_pltcnt)
                        cnt += 3;

                /*
                 * If plt padding is needed (Sparcv9).
                 */
                if (ofl->ofl_pltpad)
                        cnt += 2;               /* DT_PLTPAD & DT_PLTPADSZ */

                /*
                 * If we have any relocations reserve a DT_REL, DT_RELSZ and
                 * DT_RELENT entry.
                 */
                if (ofl->ofl_relocsz)
                        cnt += 3;

                /*
                 * If a syminfo section is required create DT_SYMINFO,
                 * DT_SYMINSZ, and DT_SYMINENT entries.
                 */
                if (flags & FLG_OF_SYMINFO)
                        cnt += 3;

                /*
                 * If there are any partially initialized sections allocate
                 * DT_MOVETAB, DT_MOVESZ and DT_MOVEENT.
                 */
                if (ofl->ofl_osmove)
                        cnt += 3;

                /*
                 * Allocate one DT_REGISTER entry for every register symbol.
                 */
                cnt += ofl->ofl_regsymcnt;

                /*
                 * Reserve a entry for each '-zrtldinfo=...' specified
                 * on the command line.
                 */
                for (APLIST_TRAVERSE(ofl->ofl_rtldinfo, idx, sdp))
                        cnt++;

                /*
                 * The following entry should only be placed in a segment that
                 * is writable.
                 */
                if (((sgp = osp->os_sgdesc) != NULL) &&
                    (sgp->sg_phdr.p_flags & PF_W) && ofl->ofl_osinterp)
                        cnt++;          /* DT_DEBUG */

                /*
                 * Capabilities require a .dynamic entry for the .SUNW_cap
                 * section.
                 */
                if (ofl->ofl_oscap)
                        cnt++;                  /* DT_SUNW_CAP */

                /*
                 * Symbol capabilities require a .dynamic entry for the
                 * .SUNW_capinfo section.
                 */
                if (ofl->ofl_oscapinfo)
                        cnt++;                  /* DT_SUNW_CAPINFO */

                /*
                 * Capabilities chain information requires a .SUNW_capchain
                 * entry (DT_SUNW_CAPCHAIN), entry size (DT_SUNW_CAPCHAINENT),
                 * and total size (DT_SUNW_CAPCHAINSZ).
                 */
                if (ofl->ofl_oscapchain)
                        cnt += 3;

                if (flags & FLG_OF_SYMBOLIC)
                        cnt++;                  /* DT_SYMBOLIC */

                if (ofl->ofl_aslr != 0)         /* DT_SUNW_ASLR */
                        cnt++;
        }

        /* DT_SUNW_KMOD */
        if (ofl->ofl_flags & FLG_OF_KMOD)
                cnt++;

        /*
         * Account for Architecture dependent .dynamic entries, and defaults.
         */
        (*ld_targ.t_mr.mr_mach_make_dynamic)(ofl, &cnt);

        /*
         * DT_FLAGS, DT_FLAGS_1, DT_SUNW_STRPAD, and DT_NULL. Also,
         * allow room for the unused extra DT_NULLs. These are included
         * to allow an ELF editor room to add items later.
         */
        cnt += 4 + DYNAMIC_EXTRA_ELTS;

        /*
         * DT_SUNW_LDMACH. Used to hold the ELF machine code of the
         * linker that produced the output object. This information
         * allows us to determine whether a given object was linked
         * natively, or by a linker running on a different type of
         * system. This information can be valuable if one suspects
         * that a problem might be due to alignment or byte order issues.
         */
        cnt++;

        /*
         * Determine the size of the section from the number of entries.
         */
        size = cnt * (size_t)shdr->sh_entsize;

        shdr->sh_size = (Xword)size;
        data->d_size = size;

        /*
         * There are several tags that are specific to the Solaris osabi
         * range which we unconditionally put into any dynamic section
         * we create (e.g. DT_SUNW_STRPAD or DT_SUNW_LDMACH). As such,
         * any Solaris object with a dynamic section should be tagged as
         * ELFOSABI_SOLARIS.
         */
        ofl->ofl_flags |= FLG_OF_OSABI;

        return ((uintptr_t)ofl->ofl_osdynamic);
}

/*
 * Build the GOT section and its associated relocation entries.
 */
uintptr_t
ld_make_got(Ofl_desc *ofl)
{
        Elf_Data        *data;
        Shdr    *shdr;
        Is_desc *isec;
        size_t  size = (size_t)ofl->ofl_gotcnt * ld_targ.t_m.m_got_entsize;
        size_t  rsize = (size_t)ofl->ofl_relocgotsz;

        if (new_section(ofl, SHT_PROGBITS, MSG_ORIG(MSG_SCN_GOT), 0,
            &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        data->d_size = size;

        shdr->sh_flags |= SHF_WRITE;
        shdr->sh_size = (Xword)size;
        shdr->sh_entsize = ld_targ.t_m.m_got_entsize;

        ofl->ofl_osgot = ld_place_section(ofl, isec, NULL,
            ld_targ.t_id.id_got, NULL);
        if (ofl->ofl_osgot == (Os_desc *)S_ERROR)
                return (S_ERROR);

        ofl->ofl_osgot->os_szoutrels = (Xword)rsize;

        return (1);
}

/*
 * Build an interpreter section.
 */
static uintptr_t
make_interp(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        const char      *iname = ofl->ofl_interp;
        size_t          size;

        /*
         * If -z nointerp is in effect, don't create an interpreter section.
         */
        if (ofl->ofl_flags1 & FLG_OF1_NOINTRP)
                return (1);

        /*
         * An .interp section is always created for a dynamic executable.
         * A user can define the interpreter to use.  This definition overrides
         * the default that would be recorded in an executable, and triggers
         * the creation of an .interp section in any other object.  Presumably
         * the user knows what they are doing.  Refer to the generic ELF ABI
         * section 5-4, and the ld(1) -I option.
         */
        if (((ofl->ofl_flags & (FLG_OF_DYNAMIC | FLG_OF_EXEC |
            FLG_OF_RELOBJ)) != (FLG_OF_DYNAMIC | FLG_OF_EXEC)) && !iname)
                return (1);

        /*
         * In the case of a dynamic executable, supply a default interpreter
         * if the user has not specified their own.
         */
        if (iname == NULL)
                iname = ofl->ofl_interp = ld_targ.t_m.m_def_interp;

        size = strlen(iname) + 1;

        if (new_section(ofl, SHT_PROGBITS, MSG_ORIG(MSG_SCN_INTERP), 0,
            &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        data->d_size = size;
        shdr->sh_size = (Xword)size;
        data->d_align = shdr->sh_addralign = 1;

        ofl->ofl_osinterp =
            ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_interp, NULL);
        return ((uintptr_t)ofl->ofl_osinterp);
}

/*
 * Common function used to build the SHT_SUNW_versym section, SHT_SUNW_syminfo
 * section, and SHT_SUNW_capinfo section.  Each of these sections provide
 * additional symbol information, and their size parallels the associated
 * symbol table.
 */
static Os_desc *
make_sym_sec(Ofl_desc *ofl, const char *sectname, Word stype, int ident)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;

        /*
         * We don't know the size of this section yet, so set it to 0.  The
         * size gets filled in after the associated symbol table is sized.
         */
        if (new_section(ofl, stype, sectname, 0, &isec, &shdr, &data) ==
            S_ERROR)
                return ((Os_desc *)S_ERROR);

        return (ld_place_section(ofl, isec, NULL, ident, NULL));
}

/*
 * Determine whether a symbol capability is redundant because the object
 * capabilities are more restrictive.
 */
inline static int
is_cap_redundant(Objcapset *ocapset, Objcapset *scapset)
{
        Alist           *oalp, *salp;
        elfcap_mask_t   omsk, smsk;

        /*
         * Inspect any platform capabilities.  If the object defines platform
         * capabilities, then the object will only be loaded for those
         * platforms.  A symbol capability set that doesn't define the same
         * platforms is redundant, and a symbol capability that does not provide
         * at least one platform name that matches a platform name in the object
         * capabilities will never execute (as the object wouldn't have been
         * loaded).
         */
        oalp = ocapset->oc_plat.cl_val;
        salp = scapset->oc_plat.cl_val;
        if (oalp && ((salp == NULL) || cap_names_match(oalp, salp)))
                return (1);

        /*
         * If the symbol capability set defines platforms, and the object
         * doesn't, then the symbol set is more restrictive.
         */
        if (salp && (oalp == NULL))
                return (0);

        /*
         * Next, inspect any machine name capabilities.  If the object defines
         * machine name capabilities, then the object will only be loaded for
         * those machines.  A symbol capability set that doesn't define the same
         * machine names is redundant, and a symbol capability that does not
         * provide at least one machine name that matches a machine name in the
         * object capabilities will never execute (as the object wouldn't have
         * been loaded).
         */
        oalp = ocapset->oc_plat.cl_val;
        salp = scapset->oc_plat.cl_val;
        if (oalp && ((salp == NULL) || cap_names_match(oalp, salp)))
                return (1);

        /*
         * If the symbol capability set defines machine names, and the object
         * doesn't, then the symbol set is more restrictive.
         */
        if (salp && (oalp == NULL))
                return (0);

        /*
         * Next, inspect any hardware capabilities.  If the objects hardware
         * capabilities are greater than or equal to that of the symbols
         * capabilities, then the symbol capability set is redundant.  If the
         * symbols hardware capabilities are greater that the objects, then the
         * symbol set is more restrictive.
         *
         * Note that this is a somewhat arbitrary definition, as each capability
         * bit is independent of the others, and some of the higher order bits
         * could be considered to be less important than lower ones.  However,
         * this is the only reasonable non-subjective definition.
         */
        omsk = ocapset->oc_hw_3.cm_val;
        smsk = scapset->oc_hw_3.cm_val;
        if ((omsk > smsk) || (omsk && (omsk == smsk)))
                return (1);
        if (omsk < smsk)
                return (0);


        omsk = ocapset->oc_hw_2.cm_val;
        smsk = scapset->oc_hw_2.cm_val;
        if ((omsk > smsk) || (omsk && (omsk == smsk)))
                return (1);
        if (omsk < smsk)
                return (0);

        /*
         * Finally, inspect the remaining hardware capabilities.
         */
        omsk = ocapset->oc_hw_1.cm_val;
        smsk = scapset->oc_hw_1.cm_val;
        if ((omsk > smsk) || (omsk && (omsk == smsk)))
                return (1);

        return (0);
}

/*
 * Capabilities values might have been assigned excluded values.  These
 * excluded values should be removed before calculating any capabilities
 * sections size.
 */
static void
capmask_value(Lm_list *lml, Word type, Capmask *capmask, int *title)
{
        /*
         * First determine whether any bits should be excluded.
         */
        if ((capmask->cm_val & capmask->cm_exc) == 0)
                return;

        DBG_CALL(Dbg_cap_post_title(lml, title));

        DBG_CALL(Dbg_cap_val_entry(lml, DBG_STATE_CURRENT, type,
            capmask->cm_val, ld_targ.t_m.m_mach));
        DBG_CALL(Dbg_cap_val_entry(lml, DBG_STATE_EXCLUDE, type,
            capmask->cm_exc, ld_targ.t_m.m_mach));

        capmask->cm_val &= ~capmask->cm_exc;

        DBG_CALL(Dbg_cap_val_entry(lml, DBG_STATE_RESOLVED, type,
            capmask->cm_val, ld_targ.t_m.m_mach));
}

static void
capstr_value(Lm_list *lml, Word type, Caplist *caplist, int *title)
{
        Aliste  idx1, idx2;
        char    *estr;
        Capstr  *capstr;
        Boolean found = FALSE;

        /*
         * First determine whether any strings should be excluded.
         */
        for (APLIST_TRAVERSE(caplist->cl_exc, idx1, estr)) {
                for (ALIST_TRAVERSE(caplist->cl_val, idx2, capstr)) {
                        if (strcmp(estr, capstr->cs_str) == 0) {
                                found = TRUE;
                                break;
                        }
                }
        }

        if (found == FALSE)
                return;

        /*
         * Traverse the current strings, then delete the excluded strings,
         * and finally display the resolved strings.
         */
        if (DBG_ENABLED) {
                Dbg_cap_post_title(lml, title);
                for (ALIST_TRAVERSE(caplist->cl_val, idx2, capstr)) {
                        Dbg_cap_ptr_entry(lml, DBG_STATE_CURRENT, type,
                            capstr->cs_str);
                }
        }
        for (APLIST_TRAVERSE(caplist->cl_exc, idx1, estr)) {
                for (ALIST_TRAVERSE(caplist->cl_val, idx2, capstr)) {
                        if (strcmp(estr, capstr->cs_str) == 0) {
                                DBG_CALL(Dbg_cap_ptr_entry(lml,
                                    DBG_STATE_EXCLUDE, type, capstr->cs_str));
                                alist_delete(caplist->cl_val, &idx2);
                                break;
                        }
                }
        }
        if (DBG_ENABLED) {
                for (ALIST_TRAVERSE(caplist->cl_val, idx2, capstr)) {
                        Dbg_cap_ptr_entry(lml, DBG_STATE_RESOLVED, type,
                            capstr->cs_str);
                }
        }
}

/*
 * Build a capabilities section.
 */
#define CAP_UPDATE(cap, capndx, tag, val)       \
        cap->c_tag = tag; \
        cap->c_un.c_val = val; \
        cap++, capndx++;

static uintptr_t
make_cap(Ofl_desc *ofl, Word shtype, const char *shname, int ident)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        Cap             *cap;
        size_t          size = 0;
        Word            capndx = 0;
        Str_tbl         *strtbl;
        Objcapset       *ocapset = &ofl->ofl_ocapset;
        Aliste          idx1;
        Capstr          *capstr;
        int             title = 0;

        /*
         * Determine which string table to use for any CA_SUNW_MACH,
         * CA_SUNW_PLAT, or CA_SUNW_ID strings.
         */
        if (OFL_IS_STATIC_OBJ(ofl))
                strtbl = ofl->ofl_strtab;
        else
                strtbl = ofl->ofl_dynstrtab;

        /*
         * If symbol capabilities have been requested, but none have been
         * created, warn the user.  This scenario can occur if none of the
         * input relocatable objects defined any object capabilities.
         */
        if ((ofl->ofl_flags & FLG_OF_OTOSCAP) && (ofl->ofl_capsymcnt == 0))
                ld_eprintf(ofl, ERR_WARNING, MSG_INTL(MSG_CAP_NOSYMSFOUND));

        /*
         * If symbol capabilities have been collected, but no symbols are left
         * referencing these capabilities, promote the capability groups back
         * to an object capability definition.
         */
        if ((ofl->ofl_flags & FLG_OF_OTOSCAP) && ofl->ofl_capsymcnt &&
            (ofl->ofl_capfamilies == NULL)) {
                ld_eprintf(ofl, ERR_WARNING, MSG_INTL(MSG_CAP_NOSYMSFOUND));
                ld_cap_move_symtoobj(ofl);
                ofl->ofl_capsymcnt = 0;
                ofl->ofl_capgroups = NULL;
                ofl->ofl_flags &= ~FLG_OF_OTOSCAP;
        }

        /*
         * Remove any excluded capabilities.
         */
        capstr_value(ofl->ofl_lml, CA_SUNW_PLAT, &ocapset->oc_plat, &title);
        capstr_value(ofl->ofl_lml, CA_SUNW_MACH, &ocapset->oc_mach, &title);
        capmask_value(ofl->ofl_lml, CA_SUNW_HW_3, &ocapset->oc_hw_3, &title);
        capmask_value(ofl->ofl_lml, CA_SUNW_HW_2, &ocapset->oc_hw_2, &title);
        capmask_value(ofl->ofl_lml, CA_SUNW_HW_1, &ocapset->oc_hw_1, &title);
        capmask_value(ofl->ofl_lml, CA_SUNW_SF_1, &ocapset->oc_sf_1, &title);

        /*
         * Determine how many entries are required for any object capabilities.
         */
        size += alist_nitems(ocapset->oc_plat.cl_val);
        size += alist_nitems(ocapset->oc_mach.cl_val);
        if (ocapset->oc_hw_3.cm_val)
                size++;
        if (ocapset->oc_hw_2.cm_val)
                size++;
        if (ocapset->oc_hw_1.cm_val)
                size++;
        if (ocapset->oc_sf_1.cm_val)
                size++;

        /*
         * Only identify a capabilities group if the group has content.  If a
         * capabilities identifier exists, and no other capabilities have been
         * supplied, remove the identifier.  This scenario could exist if a
         * user mistakenly defined a lone identifier, or if an identified group
         * was overridden so as to clear the existing capabilities and the
         * identifier was not also cleared.
         */
        if (ocapset->oc_id.cs_str) {
                if (size)
                        size++;
                else
                        ocapset->oc_id.cs_str = NULL;
        }
        if (size)
                size++;                 /* Add CA_SUNW_NULL */

        /*
         * Determine how many entries are required for any symbol capabilities.
         */
        if (ofl->ofl_capsymcnt) {
                /*
                 * If there are no object capabilities, a CA_SUNW_NULL entry
                 * is required before any symbol capabilities.
                 */
                if (size == 0)
                        size++;
                size += ofl->ofl_capsymcnt;
        }

        if (size == 0)
                return (0);

        if (new_section(ofl, shtype, shname, size, &isec,
            &shdr, &data) == S_ERROR)
                return (S_ERROR);

        if ((data->d_buf = libld_malloc(shdr->sh_size)) == NULL)
                return (S_ERROR);

        cap = (Cap *)data->d_buf;

        /*
         * Fill in any object capabilities.  If there is an identifier, then the
         * identifier comes first.  The remaining items follow in precedence
         * order, although the order isn't important for runtime verification.
         */
        if (ocapset->oc_id.cs_str) {
                ofl->ofl_flags |= FLG_OF_CAPSTRS;
                if (st_insert(strtbl, ocapset->oc_id.cs_str) == -1)
                        return (S_ERROR);
                ocapset->oc_id.cs_ndx = capndx;
                CAP_UPDATE(cap, capndx, CA_SUNW_ID, 0);
        }
        if (ocapset->oc_plat.cl_val) {
                ofl->ofl_flags |= (FLG_OF_PTCAP | FLG_OF_CAPSTRS);

                /*
                 * Insert any platform name strings in the appropriate string
                 * table.  The capability value can't be filled in yet, as the
                 * final offset of the strings isn't known until later.
                 */
                for (ALIST_TRAVERSE(ocapset->oc_plat.cl_val, idx1, capstr)) {
                        if (st_insert(strtbl, capstr->cs_str) == -1)
                                return (S_ERROR);
                        capstr->cs_ndx = capndx;
                        CAP_UPDATE(cap, capndx, CA_SUNW_PLAT, 0);
                }
        }
        if (ocapset->oc_mach.cl_val) {
                ofl->ofl_flags |= (FLG_OF_PTCAP | FLG_OF_CAPSTRS);

                /*
                 * Insert the machine name strings in the appropriate string
                 * table.  The capability value can't be filled in yet, as the
                 * final offset of the strings isn't known until later.
                 */
                for (ALIST_TRAVERSE(ocapset->oc_mach.cl_val, idx1, capstr)) {
                        if (st_insert(strtbl, capstr->cs_str) == -1)
                                return (S_ERROR);
                        capstr->cs_ndx = capndx;
                        CAP_UPDATE(cap, capndx, CA_SUNW_MACH, 0);
                }
        }
        if (ocapset->oc_hw_3.cm_val) {
                ofl->ofl_flags |= FLG_OF_PTCAP;
                CAP_UPDATE(cap, capndx, CA_SUNW_HW_3, ocapset->oc_hw_3.cm_val);
        }
        if (ocapset->oc_hw_2.cm_val) {
                ofl->ofl_flags |= FLG_OF_PTCAP;
                CAP_UPDATE(cap, capndx, CA_SUNW_HW_2, ocapset->oc_hw_2.cm_val);
        }
        if (ocapset->oc_hw_1.cm_val) {
                ofl->ofl_flags |= FLG_OF_PTCAP;
                CAP_UPDATE(cap, capndx, CA_SUNW_HW_1, ocapset->oc_hw_1.cm_val);
        }
        if (ocapset->oc_sf_1.cm_val) {
                ofl->ofl_flags |= FLG_OF_PTCAP;
                CAP_UPDATE(cap, capndx, CA_SUNW_SF_1, ocapset->oc_sf_1.cm_val);
        }
        CAP_UPDATE(cap, capndx, CA_SUNW_NULL, 0);

        /*
         * Fill in any symbol capabilities.
         */
        if (ofl->ofl_capgroups) {
                Cap_group       *cgp;

                for (APLIST_TRAVERSE(ofl->ofl_capgroups, idx1, cgp)) {
                        Objcapset       *scapset = &cgp->cg_set;
                        Aliste          idx2;
                        Is_desc         *isp;

                        cgp->cg_ndx = capndx;

                        if (scapset->oc_id.cs_str) {
                                ofl->ofl_flags |= FLG_OF_CAPSTRS;
                                /*
                                 * Insert the identifier string in the
                                 * appropriate string table.  The capability
                                 * value can't be filled in yet, as the final
                                 * offset of the string isn't known until later.
                                 */
                                if (st_insert(strtbl,
                                    scapset->oc_id.cs_str) == -1)
                                        return (S_ERROR);
                                scapset->oc_id.cs_ndx = capndx;
                                CAP_UPDATE(cap, capndx, CA_SUNW_ID, 0);
                        }

                        if (scapset->oc_plat.cl_val) {
                                ofl->ofl_flags |= FLG_OF_CAPSTRS;

                                /*
                                 * Insert the platform name string in the
                                 * appropriate string table.  The capability
                                 * value can't be filled in yet, as the final
                                 * offset of the string isn't known until later.
                                 */
                                for (ALIST_TRAVERSE(scapset->oc_plat.cl_val,
                                    idx2, capstr)) {
                                        if (st_insert(strtbl,
                                            capstr->cs_str) == -1)
                                                return (S_ERROR);
                                        capstr->cs_ndx = capndx;
                                        CAP_UPDATE(cap, capndx,
                                            CA_SUNW_PLAT, 0);
                                }
                        }
                        if (scapset->oc_mach.cl_val) {
                                ofl->ofl_flags |= FLG_OF_CAPSTRS;

                                /*
                                 * Insert the machine name string in the
                                 * appropriate string table.  The capability
                                 * value can't be filled in yet, as the final
                                 * offset of the string isn't known until later.
                                 */
                                for (ALIST_TRAVERSE(scapset->oc_mach.cl_val,
                                    idx2, capstr)) {
                                        if (st_insert(strtbl,
                                            capstr->cs_str) == -1)
                                                return (S_ERROR);
                                        capstr->cs_ndx = capndx;
                                        CAP_UPDATE(cap, capndx,
                                            CA_SUNW_MACH, 0);
                                }
                        }
                        if (scapset->oc_hw_3.cm_val) {
                                CAP_UPDATE(cap, capndx, CA_SUNW_HW_3,
                                    scapset->oc_hw_3.cm_val);
                        }
                        if (scapset->oc_hw_2.cm_val) {
                                CAP_UPDATE(cap, capndx, CA_SUNW_HW_2,
                                    scapset->oc_hw_2.cm_val);
                        }
                        if (scapset->oc_hw_1.cm_val) {
                                CAP_UPDATE(cap, capndx, CA_SUNW_HW_1,
                                    scapset->oc_hw_1.cm_val);
                        }
                        if (scapset->oc_sf_1.cm_val) {
                                CAP_UPDATE(cap, capndx, CA_SUNW_SF_1,
                                    scapset->oc_sf_1.cm_val);
                        }
                        CAP_UPDATE(cap, capndx, CA_SUNW_NULL, 0);

                        /*
                         * If any object capabilities are available, determine
                         * whether these symbol capabilities are less
                         * restrictive, and hence redundant.
                         */
                        if (((ofl->ofl_flags & FLG_OF_PTCAP) == 0) ||
                            (is_cap_redundant(ocapset, scapset) == 0))
                                continue;

                        /*
                         * Indicate any files that provide redundant symbol
                         * capabilities.
                         */
                        for (APLIST_TRAVERSE(cgp->cg_secs, idx2, isp)) {
                                ld_eprintf(ofl, ERR_WARNING,
                                    MSG_INTL(MSG_CAP_REDUNDANT),
                                    isp->is_file->ifl_name,
                                    EC_WORD(isp->is_scnndx), isp->is_name);
                        }
                }
        }

        /*
         * If capabilities strings are required, the sh_info field of the
         * section header will be set to the associated string table.
         */
        if (ofl->ofl_flags & FLG_OF_CAPSTRS)
                shdr->sh_flags |= SHF_INFO_LINK;

        /*
         * Place these capabilities in the output file.
         */
        if ((ofl->ofl_oscap = ld_place_section(ofl, isec,
            NULL, ident, NULL)) == (Os_desc *)S_ERROR)
                return (S_ERROR);

        /*
         * If symbol capabilities are required, then a .SUNW_capinfo section is
         * also created.  This table will eventually be sized to match the
         * associated symbol table.
         */
        if (ofl->ofl_capfamilies) {
                if ((ofl->ofl_oscapinfo = make_sym_sec(ofl,
                    MSG_ORIG(MSG_SCN_SUNWCAPINFO), SHT_SUNW_capinfo,
                    ld_targ.t_id.id_capinfo)) == (Os_desc *)S_ERROR)
                        return (S_ERROR);

                /*
                 * If we're generating a dynamic object, capabilities family
                 * members are maintained in a .SUNW_capchain section.
                 */
                if (ofl->ofl_capchaincnt &&
                    ((ofl->ofl_flags & FLG_OF_RELOBJ) == 0)) {
                        if (new_section(ofl, SHT_SUNW_capchain,
                            MSG_ORIG(MSG_SCN_SUNWCAPCHAIN),
                            ofl->ofl_capchaincnt, &isec, &shdr,
                            &data) == S_ERROR)
                                return (S_ERROR);

                        ofl->ofl_oscapchain = ld_place_section(ofl, isec,
                            NULL, ld_targ.t_id.id_capchain, NULL);
                        if (ofl->ofl_oscapchain == (Os_desc *)S_ERROR)
                                return (S_ERROR);

                }
        }
        return (1);
}
#undef  CAP_UPDATE

/*
 * Build the PLT section and its associated relocation entries.
 */
static uintptr_t
make_plt(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        size_t          size = ld_targ.t_m.m_plt_reservsz +
            (((size_t)ofl->ofl_pltcnt + (size_t)ofl->ofl_pltpad) *
            ld_targ.t_m.m_plt_entsize);
        size_t          rsize = (size_t)ofl->ofl_relocpltsz;

        /*
         * On sparc, account for the NOP at the end of the plt.
         */
        if (ld_targ.t_m.m_mach == LD_TARG_BYCLASS(EM_SPARC, EM_SPARCV9))
                size += sizeof (Word);

        if (new_section(ofl, SHT_PROGBITS, MSG_ORIG(MSG_SCN_PLT), 0,
            &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        data->d_size = size;
        data->d_align = ld_targ.t_m.m_plt_align;

        shdr->sh_flags = ld_targ.t_m.m_plt_shf_flags;
        shdr->sh_size = (Xword)size;
        shdr->sh_addralign = ld_targ.t_m.m_plt_align;
        shdr->sh_entsize = ld_targ.t_m.m_plt_entsize;

        ofl->ofl_osplt = ld_place_section(ofl, isec, NULL,
            ld_targ.t_id.id_plt, NULL);
        if (ofl->ofl_osplt == (Os_desc *)S_ERROR)
                return (S_ERROR);

        ofl->ofl_osplt->os_szoutrels = (Xword)rsize;

        return (1);
}

/*
 * Make the hash table.  Only built for dynamic executables and shared
 * libraries, and provides hashed lookup into the global symbol table
 * (.dynsym) for the run-time linker to resolve symbol lookups.
 */
static uintptr_t
make_hash(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        size_t          size;
        Word            nsyms = ofl->ofl_globcnt;
        size_t          cnt;

        /*
         * Allocate section header structures. We set entcnt to 0
         * because it's going to change after we place this section.
         */
        if (new_section(ofl, SHT_HASH, MSG_ORIG(MSG_SCN_HASH), 0,
            &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        /*
         * Place the section first since it will affect the local symbol
         * count.
         */
        ofl->ofl_oshash =
            ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_hash, NULL);
        if (ofl->ofl_oshash == (Os_desc *)S_ERROR)
                return (S_ERROR);

        /*
         * Calculate the number of output hash buckets.
         */
        ofl->ofl_hashbkts = findprime(nsyms);

        /*
         * The size of the hash table is determined by
         *
         *      i.      the initial nbucket and nchain entries (2)
         *      ii.     the number of buckets (calculated above)
         *      iii.    the number of chains (this is based on the number of
         *              symbols in the .dynsym array).
         */
        cnt = 2 + ofl->ofl_hashbkts + DYNSYM_ALL_CNT(ofl);
        size = cnt * shdr->sh_entsize;

        /*
         * Finalize the section header and data buffer initialization.
         */
        if ((data->d_buf = libld_calloc(size, 1)) == NULL)
                return (S_ERROR);
        data->d_size = size;
        shdr->sh_size = (Xword)size;

        return (1);
}

/*
 * Generate the standard symbol table.  Contains all locals and globals,
 * and resides in a non-allocatable section (ie. it can be stripped).
 */
static uintptr_t
make_symtab(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        Is_desc         *xisec = 0;
        size_t          size;
        Word            symcnt;

        /*
         * Create the section headers. Note that we supply an ent_cnt
         * of 0. We won't know the count until the section has been placed.
         */
        if (new_section(ofl, SHT_SYMTAB, MSG_ORIG(MSG_SCN_SYMTAB), 0,
            &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        /*
         * Place the section first since it will affect the local symbol
         * count.
         */
        if ((ofl->ofl_ossymtab = ld_place_section(ofl, isec, NULL,
            ld_targ.t_id.id_symtab, NULL)) == (Os_desc *)S_ERROR)
                return (S_ERROR);

        /*
         * At this point we've created all but the 'shstrtab' section.
         * Determine if we have to use 'Extended Sections'.  If so - then
         * also create a SHT_SYMTAB_SHNDX section.
         */
        if ((ofl->ofl_shdrcnt + 1) >= SHN_LORESERVE) {
                Shdr            *xshdr;
                Elf_Data        *xdata;

                if (new_section(ofl, SHT_SYMTAB_SHNDX,
                    MSG_ORIG(MSG_SCN_SYMTAB_SHNDX), 0, &xisec,
                    &xshdr, &xdata) == S_ERROR)
                        return (S_ERROR);

                if ((ofl->ofl_ossymshndx = ld_place_section(ofl, xisec, NULL,
                    ld_targ.t_id.id_symtab_ndx, NULL)) == (Os_desc *)S_ERROR)
                        return (S_ERROR);
        }

        /*
         * Calculated number of symbols, which need to be augmented by
         * the (yet to be created) .shstrtab entry.
         */
        symcnt = (size_t)(1 + SYMTAB_ALL_CNT(ofl));
        size = symcnt * shdr->sh_entsize;

        /*
         * Finalize the section header and data buffer initialization.
         */
        data->d_size = size;
        shdr->sh_size = (Xword)size;

        /*
         * If we created a SHT_SYMTAB_SHNDX - then set it's sizes too.
         */
        if (xisec) {
                size_t  xsize = symcnt * sizeof (Word);

                xisec->is_indata->d_size = xsize;
                xisec->is_shdr->sh_size = (Xword)xsize;
        }

        return (1);
}

/*
 * Build a dynamic symbol table. These tables reside in the text
 * segment of a dynamic executable or shared library.
 *
 *      .SUNW_ldynsym contains local function symbols
 *      .dynsym contains only globals symbols
 *
 * The two tables are created adjacent to each other, with .SUNW_ldynsym
 * coming first.
 */
static uintptr_t
make_dynsym(Ofl_desc *ofl)
{
        Shdr            *shdr, *lshdr;
        Elf_Data        *data, *ldata;
        Is_desc         *isec, *lisec;
        size_t          size;
        Xword           cnt;
        int             allow_ldynsym;

        /*
         * Unless explicitly disabled, always produce a .SUNW_ldynsym section
         * when it is allowed by the file type, even if the resulting
         * table only ends up with a single STT_FILE in it. There are
         * two reasons: (1) It causes the generation of the DT_SUNW_SYMTAB
         * entry in the .dynamic section, which is something we would
         * like to encourage, and (2) Without it, we cannot generate
         * the associated .SUNW_dyn[sym|tls]sort sections, which are of
         * value to DTrace.
         *
         * In practice, it is extremely rare for an object not to have
         * local symbols for .SUNW_ldynsym, so 99% of the time, we'd be
         * doing it anyway.
         */
        allow_ldynsym = OFL_ALLOW_LDYNSYM(ofl);

        /*
         * Create the section headers. Note that we supply an ent_cnt
         * of 0. We won't know the count until the section has been placed.
         */
        if (allow_ldynsym && new_section(ofl, SHT_SUNW_LDYNSYM,
            MSG_ORIG(MSG_SCN_LDYNSYM), 0, &lisec, &lshdr, &ldata) == S_ERROR)
                return (S_ERROR);

        if (new_section(ofl, SHT_DYNSYM, MSG_ORIG(MSG_SCN_DYNSYM), 0,
            &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        /*
         * Place the section(s) first since it will affect the local symbol
         * count.
         */
        if (allow_ldynsym &&
            ((ofl->ofl_osldynsym = ld_place_section(ofl, lisec, NULL,
            ld_targ.t_id.id_ldynsym, NULL)) == (Os_desc *)S_ERROR))
                return (S_ERROR);
        ofl->ofl_osdynsym =
            ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_dynsym, NULL);
        if (ofl->ofl_osdynsym == (Os_desc *)S_ERROR)
                return (S_ERROR);

        cnt = DYNSYM_ALL_CNT(ofl);
        size = (size_t)cnt * shdr->sh_entsize;

        /*
         * Finalize the section header and data buffer initialization.
         */
        data->d_size = size;
        shdr->sh_size = (Xword)size;

        /*
         * An ldynsym contains local function symbols. It is not
         * used for linking, but if present, serves to allow better
         * stack traces to be generated in contexts where the symtab
         * is not available. (dladdr(), or stripped executable/library files).
         */
        if (allow_ldynsym) {
                cnt = 1 + ofl->ofl_dynlocscnt + ofl->ofl_dynscopecnt;
                size = (size_t)cnt * shdr->sh_entsize;

                ldata->d_size = size;
                lshdr->sh_size = (Xword)size;
        }

        return (1);
}

/*
 * Build .SUNW_dynsymsort and/or .SUNW_dyntlssort sections. These are
 * index sections for the .SUNW_ldynsym/.dynsym pair that present data
 * and function symbols sorted by address.
 */
static uintptr_t
make_dynsort(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;

        /* Only do it if the .SUNW_ldynsym section is present */
        if (!OFL_ALLOW_LDYNSYM(ofl))
                return (1);

        /* .SUNW_dynsymsort */
        if (ofl->ofl_dynsymsortcnt > 0) {
                if (new_section(ofl, SHT_SUNW_symsort,
                    MSG_ORIG(MSG_SCN_DYNSYMSORT), ofl->ofl_dynsymsortcnt,
                    &isec, &shdr, &data) == S_ERROR)
                        return (S_ERROR);

                if ((ofl->ofl_osdynsymsort = ld_place_section(ofl, isec, NULL,
                    ld_targ.t_id.id_dynsort, NULL)) == (Os_desc *)S_ERROR)
                        return (S_ERROR);
        }

        /* .SUNW_dyntlssort */
        if (ofl->ofl_dyntlssortcnt > 0) {
                if (new_section(ofl, SHT_SUNW_tlssort,
                    MSG_ORIG(MSG_SCN_DYNTLSSORT),
                    ofl->ofl_dyntlssortcnt, &isec, &shdr, &data) == S_ERROR)
                        return (S_ERROR);

                if ((ofl->ofl_osdyntlssort = ld_place_section(ofl, isec, NULL,
                    ld_targ.t_id.id_dynsort, NULL)) == (Os_desc *)S_ERROR)
                        return (S_ERROR);
        }

        return (1);
}

/*
 * Helper routine for make_dynsym_shndx. Builds a
 * a SHT_SYMTAB_SHNDX for .dynsym or .SUNW_ldynsym, without knowing
 * which one it is.
 */
static uintptr_t
make_dyn_shndx(Ofl_desc *ofl, const char *shname, Os_desc *symtab,
    Os_desc **ret_os)
{
        Is_desc         *isec;
        Is_desc         *dynsymisp;
        Shdr            *shdr, *dynshdr;
        Elf_Data        *data;

        dynsymisp = ld_os_first_isdesc(symtab);
        dynshdr = dynsymisp->is_shdr;

        if (new_section(ofl, SHT_SYMTAB_SHNDX, shname,
            (dynshdr->sh_size / dynshdr->sh_entsize),
            &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        if ((*ret_os = ld_place_section(ofl, isec, NULL,
            ld_targ.t_id.id_dynsym_ndx, NULL)) == (Os_desc *)S_ERROR)
                return (S_ERROR);

        assert(*ret_os);

        return (1);
}

/*
 * Build a SHT_SYMTAB_SHNDX for the .dynsym, and .SUNW_ldynsym
 */
static uintptr_t
make_dynsym_shndx(Ofl_desc *ofl)
{
        /*
         * If there is a .SUNW_ldynsym, generate a section for its extended
         * index section as well.
         */
        if (OFL_ALLOW_LDYNSYM(ofl)) {
                if (make_dyn_shndx(ofl, MSG_ORIG(MSG_SCN_LDYNSYM_SHNDX),
                    ofl->ofl_osldynsym, &ofl->ofl_osldynshndx) == S_ERROR)
                        return (S_ERROR);
        }

        /* The Generate a section for the dynsym */
        if (make_dyn_shndx(ofl, MSG_ORIG(MSG_SCN_DYNSYM_SHNDX),
            ofl->ofl_osdynsym, &ofl->ofl_osdynshndx) == S_ERROR)
                return (S_ERROR);

        return (1);
}


/*
 * Build a string table for the section headers.
 */
static uintptr_t
make_shstrtab(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        size_t          size;

        if (new_section(ofl, SHT_STRTAB, MSG_ORIG(MSG_SCN_SHSTRTAB),
            0, &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        /*
         * Place the section first, as it may effect the number of section
         * headers to account for.
         */
        ofl->ofl_osshstrtab =
            ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_note, NULL);
        if (ofl->ofl_osshstrtab == (Os_desc *)S_ERROR)
                return (S_ERROR);

        size = st_getstrtab_sz(ofl->ofl_shdrsttab);
        assert(size > 0);

        data->d_size = size;
        shdr->sh_size = (Xword)size;

        return (1);
}

/*
 * Build a string section for the standard symbol table.
 */
static uintptr_t
make_strtab(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        size_t          size;

        /*
         * This string table consists of all the global and local symbols.
         * Account for null bytes at end of the file name and the beginning
         * of section.
         */
        if (st_insert(ofl->ofl_strtab, ofl->ofl_name) == -1)
                return (S_ERROR);

        size = st_getstrtab_sz(ofl->ofl_strtab);
        assert(size > 0);

        if (new_section(ofl, SHT_STRTAB, MSG_ORIG(MSG_SCN_STRTAB),
            0, &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        /* Set the size of the data area */
        data->d_size = size;
        shdr->sh_size = (Xword)size;

        ofl->ofl_osstrtab =
            ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_strtab, NULL);
        return ((uintptr_t)ofl->ofl_osstrtab);
}

/*
 * Build a string table for the dynamic symbol table.
 */
static uintptr_t
make_dynstr(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        size_t          size;

        /*
         * If producing a .SUNW_ldynsym, account for the initial STT_FILE
         * symbol that precedes the scope reduced global symbols.
         */
        if (OFL_ALLOW_LDYNSYM(ofl)) {
                if (st_insert(ofl->ofl_dynstrtab, ofl->ofl_name) == -1)
                        return (S_ERROR);
                ofl->ofl_dynscopecnt++;
        }

        /*
         * Account for any local, named register symbols.  These locals are
         * required for reference from DT_REGISTER .dynamic entries.
         */
        if (ofl->ofl_regsyms) {
                int     ndx;

                for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) {
                        Sym_desc        *sdp;

                        if ((sdp = ofl->ofl_regsyms[ndx]) == NULL)
                                continue;

                        if (!SYM_IS_HIDDEN(sdp) &&
                            (ELF_ST_BIND(sdp->sd_sym->st_info) != STB_LOCAL))
                                continue;

                        if (sdp->sd_sym->st_name == 0)
                                continue;

                        if (st_insert(ofl->ofl_dynstrtab, sdp->sd_name) == -1)
                                return (S_ERROR);
                }
        }

        /*
         * Reserve entries for any per-symbol auxiliary/filter strings.
         */
        if (ofl->ofl_dtsfltrs != NULL) {
                Dfltr_desc      *dftp;
                Aliste          idx;

                for (ALIST_TRAVERSE(ofl->ofl_dtsfltrs, idx, dftp))
                        if (st_insert(ofl->ofl_dynstrtab, dftp->dft_str) == -1)
                                return (S_ERROR);
        }

        size = st_getstrtab_sz(ofl->ofl_dynstrtab);
        assert(size > 0);

        if (new_section(ofl, SHT_STRTAB, MSG_ORIG(MSG_SCN_DYNSTR),
            0, &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        /* Make it allocable if necessary */
        if (!(ofl->ofl_flags & FLG_OF_RELOBJ))
                shdr->sh_flags |= SHF_ALLOC;

        /* Set the size of the data area */
        data->d_size = size + DYNSTR_EXTRA_PAD;

        shdr->sh_size = (Xword)size;

        ofl->ofl_osdynstr =
            ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_dynstr, NULL);
        return ((uintptr_t)ofl->ofl_osdynstr);
}

/*
 * Generate an output relocation section which will contain the relocation
 * information to be applied to the `osp' section.
 *
 * If (osp == NULL) then we are creating the coalesced relocation section
 * for an executable and/or a shared object.
 */
static uintptr_t
make_reloc(Ofl_desc *ofl, Os_desc *osp)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        size_t          size;
        Xword           sh_flags;
        char            *sectname;
        Os_desc         *rosp;
        Word            relsize;
        const char      *rel_prefix;

        /* LINTED */
        if (ld_targ.t_m.m_rel_sht_type == SHT_REL) {
                /* REL */
                relsize = sizeof (Rel);
                rel_prefix = MSG_ORIG(MSG_SCN_REL);
        } else {
                /* RELA */
                relsize = sizeof (Rela);
                rel_prefix = MSG_ORIG(MSG_SCN_RELA);
        }

        if (osp) {
                size = osp->os_szoutrels;
                sh_flags = osp->os_shdr->sh_flags;
                if ((sectname = libld_malloc(strlen(rel_prefix) +
                    strlen(osp->os_name) + 1)) == 0)
                        return (S_ERROR);
                (void) strcpy(sectname, rel_prefix);
                (void) strcat(sectname, osp->os_name);
        } else if (ofl->ofl_flags & FLG_OF_COMREL) {
                size = (ofl->ofl_reloccnt - ofl->ofl_reloccntsub) * relsize;
                sh_flags = SHF_ALLOC;
                sectname = (char *)MSG_ORIG(MSG_SCN_SUNWRELOC);
        } else {
                size = ofl->ofl_relocrelsz;
                sh_flags = SHF_ALLOC;
                sectname = (char *)rel_prefix;
        }

        /*
         * Keep track of total size of 'output relocations' (to be stored
         * in .dynamic)
         */
        /* LINTED */
        ofl->ofl_relocsz += (Xword)size;

        if (new_section(ofl, ld_targ.t_m.m_rel_sht_type, sectname, 0, &isec,
            &shdr, &data) == S_ERROR)
                return (S_ERROR);

        data->d_size = size;

        shdr->sh_size = (Xword)size;
        if (OFL_ALLOW_DYNSYM(ofl) && (sh_flags & SHF_ALLOC))
                shdr->sh_flags = SHF_ALLOC;

        if (osp) {
                /*
                 * The sh_info field of the SHT_REL* sections points to the
                 * section the relocations are to be applied to.
                 */
                shdr->sh_flags |= SHF_INFO_LINK;
        }

        rosp = ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_rel, NULL);
        if (rosp == (Os_desc *)S_ERROR)
                return (S_ERROR);

        /*
         * Associate this relocation section to the section its going to
         * relocate.
         */
        if (osp) {
                Aliste  idx;
                Is_desc *risp;

                /*
                 * This is used primarily so that we can update
                 * SHT_GROUP[sect_no] entries to point to the
                 * created output relocation sections.
                 */
                for (APLIST_TRAVERSE(osp->os_relisdescs, idx, risp)) {
                        risp->is_osdesc = rosp;

                        /*
                         * If the input relocation section had the SHF_GROUP
                         * flag set - propagate it to the output relocation
                         * section.
                         */
                        if (risp->is_shdr->sh_flags & SHF_GROUP) {
                                rosp->os_shdr->sh_flags |= SHF_GROUP;
                                break;
                        }
                }
                osp->os_relosdesc = rosp;
        } else
                ofl->ofl_osrel = rosp;

        /*
         * If this is the first relocation section we've encountered save it
         * so that the .dynamic entry can be initialized accordingly.
         */
        if (ofl->ofl_osrelhead == (Os_desc *)0)
                ofl->ofl_osrelhead = rosp;

        return (1);
}

/*
 * Generate version needed section.
 */
static uintptr_t
make_verneed(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;

        /*
         * verneed sections do not have a constant element size, so the
         * value of ent_cnt specified here (0) is meaningless.
         */
        if (new_section(ofl, SHT_SUNW_verneed, MSG_ORIG(MSG_SCN_SUNWVERSION),
            0, &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        /* During version processing we calculated the total size. */
        data->d_size = ofl->ofl_verneedsz;
        shdr->sh_size = (Xword)ofl->ofl_verneedsz;

        ofl->ofl_osverneed =
            ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_version, NULL);
        return ((uintptr_t)ofl->ofl_osverneed);
}

/*
 * Generate a version definition section.
 *
 *  o   the SHT_SUNW_verdef section defines the versions that exist within this
 *      image.
 */
static uintptr_t
make_verdef(Ofl_desc *ofl)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        Ver_desc        *vdp;
        Str_tbl         *strtab;

        /*
         * Reserve a string table entry for the base version dependency (other
         * dependencies have symbol representations, which will already be
         * accounted for during symbol processing).
         */
        vdp = (Ver_desc *)ofl->ofl_verdesc->apl_data[0];

        if (OFL_IS_STATIC_OBJ(ofl))
                strtab = ofl->ofl_strtab;
        else
                strtab = ofl->ofl_dynstrtab;

        if (st_insert(strtab, vdp->vd_name) == -1)
                return (S_ERROR);

        /*
         * verdef sections do not have a constant element size, so the
         * value of ent_cnt specified here (0) is meaningless.
         */
        if (new_section(ofl, SHT_SUNW_verdef, MSG_ORIG(MSG_SCN_SUNWVERSION),
            0, &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        /* During version processing we calculated the total size. */
        data->d_size = ofl->ofl_verdefsz;
        shdr->sh_size = (Xword)ofl->ofl_verdefsz;

        ofl->ofl_osverdef =
            ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_version, NULL);
        return ((uintptr_t)ofl->ofl_osverdef);
}

/*
 * This routine is called when -z nopartial is in effect.
 */
uintptr_t
ld_make_parexpn_data(Ofl_desc *ofl, size_t size, Xword align)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        Os_desc         *osp;

        if (new_section(ofl, SHT_PROGBITS, MSG_ORIG(MSG_SCN_DATA), 0,
            &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        shdr->sh_flags |= SHF_WRITE;
        data->d_size = size;
        shdr->sh_size = (Xword)size;
        if (align != 0) {
                data->d_align = align;
                shdr->sh_addralign = align;
        }

        if ((data->d_buf = libld_calloc(size, 1)) == NULL)
                return (S_ERROR);

        /*
         * Retain handle to this .data input section. Variables using move
         * sections (partial initialization) will be redirected here when
         * such global references are added and '-z nopartial' is in effect.
         */
        ofl->ofl_isparexpn = isec;
        osp = ld_place_section(ofl, isec, NULL, ld_targ.t_id.id_data, NULL);
        if (osp == (Os_desc *)S_ERROR)
                return (S_ERROR);

        if (!(osp->os_flags & FLG_OS_OUTREL)) {
                ofl->ofl_dynshdrcnt++;
                osp->os_flags |= FLG_OS_OUTREL;
        }
        return (1);
}

/*
 * Make .sunwmove section
 */
uintptr_t
ld_make_sunwmove(Ofl_desc *ofl, int mv_nums)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;
        Aliste          idx;
        Sym_desc        *sdp;
        int             cnt = 1;


        if (new_section(ofl, SHT_SUNW_move, MSG_ORIG(MSG_SCN_SUNWMOVE),
            mv_nums, &isec, &shdr, &data) == S_ERROR)
                return (S_ERROR);

        if ((data->d_buf = libld_calloc(data->d_size, 1)) == NULL)
                return (S_ERROR);

        /*
         * Copy move entries
         */
        for (APLIST_TRAVERSE(ofl->ofl_parsyms, idx, sdp)) {
                Aliste          idx2;
                Mv_desc         *mdp;

                if (sdp->sd_flags & FLG_SY_PAREXPN)
                        continue;

                for (ALIST_TRAVERSE(sdp->sd_move, idx2, mdp))
                        mdp->md_oidx = cnt++;
        }

        if ((ofl->ofl_osmove = ld_place_section(ofl, isec, NULL, 0, NULL)) ==
            (Os_desc *)S_ERROR)
                return (S_ERROR);

        return (1);
}

/*
 * Given a relocation descriptor that references a string table
 * input section, locate the string referenced and return a pointer
 * to it.
 */
static const char *
strmerge_get_reloc_str(Ofl_desc *ofl, Rel_desc *rsp)
{
        Sym_desc *sdp = rsp->rel_sym;
        Xword    str_off;

        /*
         * In the case of an STT_SECTION symbol, the addend of the
         * relocation gives the offset into the string section. For
         * other symbol types, the symbol value is the offset.
         */

        if (ELF_ST_TYPE(sdp->sd_sym->st_info) != STT_SECTION) {
                str_off = sdp->sd_sym->st_value;
        } else if ((rsp->rel_flags & FLG_REL_RELA) == FLG_REL_RELA) {
                /*
                 * For SHT_RELA, the addend value is found in the
                 * rel_raddend field of the relocation.
                 */
                str_off = rsp->rel_raddend;
        } else {        /* REL and STT_SECTION */
                /*
                 * For SHT_REL, the "addend" is not part of the relocation
                 * record. Instead, it is found at the relocation target
                 * address.
                 */
                uchar_t *addr = (uchar_t *)((uintptr_t)rsp->rel_roffset +
                    (uintptr_t)rsp->rel_isdesc->is_indata->d_buf);

                if (ld_reloc_targval_get(ofl, rsp, addr, &str_off) == 0)
                        return (0);
        }

        return (str_off + (char *)sdp->sd_isc->is_indata->d_buf);
}

/*
 * First pass over the relocation records for string table merging.
 * Build lists of relocations and symbols that will need modification,
 * and insert the strings they reference into the output string table.
 *
 * entry:
 *      ofl - Output file descriptor
 *
 * exit: On success, the string merging specific members of each output
 *      section descriptor in ofl are updated based on information from the
 *      relocation entries, and 0 is returned.
 *
 *      On error, S_ERROR is returned.
 */
static uintptr_t
ld_gather_strmerge(Ofl_desc *ofl, Rel_cache *cache)
{
        Rel_cachebuf *rbcp;
        Rel_desc *rsp;
        Sym_desc *last_sdp = NULL;
        Aliste idx1;

        /*
         * Pass 1:
         *
         * Build lists of relocations and symbols that will need
         * modification, and insert the strings they reference into
         * the output string table.
         */
        REL_CACHE_TRAVERSE(cache, idx1, rbcp, rsp) {
                Sym_desc *sdp = rsp->rel_sym;
                Os_desc *osp;
                const char *name;

                /*
                 * If there's no input section, or the input section is
                 * discarded or does not contain mergable strings, we have
                 * nothing to do.
                 */
                if ((sdp->sd_isc == NULL) || ((sdp->sd_isc->is_flags &
                    (FLG_IS_DISCARD | FLG_IS_INSTRMRG)) != FLG_IS_INSTRMRG))
                        continue;

                osp = sdp->sd_isc->is_osdesc;

                /*
                 * Remember symbol for use in the third pass. There is no
                 * reason to save a given symbol more than once, so we take
                 * advantage of the fact that relocations to a given symbol
                 * tend to cluster in the list. If this is the same symbol
                 * we saved last time, don't bother.
                 */
                if (last_sdp != sdp) {
                        if (aplist_append(&osp->os_mstrsyms, sdp,
                            AL_CNT_STRMRGSYM) == NULL)
                                return (S_ERROR);
                        last_sdp = sdp;
                }

                if ((osp->os_mstrtab == NULL) &&
                    (osp->os_mstrtab = st_new(FLG_STNEW_COMPRESS)) == NULL)
                        return (S_ERROR);

                /* Enter the string into our new string table */
                name = strmerge_get_reloc_str(ofl, rsp);
                if (st_insert(osp->os_mstrtab, name) == -1)
                        return (S_ERROR);

                /*
                 * If this is an STT_SECTION symbol, then the second pass
                 * will need to modify this relocation, so hang on to it.
                 */
                if ((ELF_ST_TYPE(sdp->sd_sym->st_info) == STT_SECTION) &&
                    (aplist_append(&osp->os_mstrrels, rsp,
                    AL_CNT_STRMRGREL) == NULL)) {
                        return (S_ERROR);
                }
        }

        return (0);
}

/*
 * If any an output section has more than one SHF_MERGE|SHF_STRINGS input
 * section, replace them with a single merged/compressed input section.
 *
 * This is done by making a Str_tbl (as we use for managing SHT_STRTAB
 * sections) per output section with compression enabled to manage all strings
 * in the mergeable input sections.  We then discard all inputs which
 * contributed to this table and replace them with an input section we create
 * taking data from this Str_tbl.  References to the now discarded sections
 * are then updated to refer to our new merged input section, and the string
 * table and other metadata are freed.
 *
 * This process is done in 3 passes.  For efficiency reasons half of pass 1 is
 * done by ld_strmerge_gather() so relocations only need to be processed once.
 * Steps 1.5 onward are performed here.  The steps are:
 *
 *      1) In ld_strmerge_gather() examine all relocations, insert strings
 *              from relocations to the mergeable input sections into the string
 *              table.
 *      1.5) Gather every string from the mergeable input sections, regardless
 *              of whether it is referenced from a relocation.   All strings
 *              must be processed, and relocations may point into the middle
 *              of an actual NUL-terminated string, so we must enter both the
 *              precise strings referenced by relocations and full strings
 *              within the section.
 *      2) Modify the relocation values to be correct for the
 *              new merged section.
 *      3) Modify the symbols used by the relocations to reference
 *              the new section.
 *
 * These passes cannot be combined:
 *      - The string table code works in two passes, and all
 *              strings have to be loaded in pass one before the
 *              offset of any strings can be determined.
 *      - Multiple relocations reference a single symbol, so the
 *              symbol cannot be modified until all relocations are
 *              fixed.
 *
 * entry:
 *      ofl - Output file descriptor
 *      osp - Outputs section descriptor
 *
 * exit:
 *      If section merging is possible for this output section, it is done.
 *      If no errors are encountered, 0 is returned. On error, S_ERROR is
 *      returned.
 *
 *      The contents of the string-merging specific members of this output
 *      section descriptor are undefined after this function returns.
 */
static uintptr_t
ld_strmerge_sec(Ofl_desc *ofl, Os_desc *osp)
{
        Is_desc         *isp = NULL;
        Sym_desc        *sdp;
        Rel_desc        *rsp;
        Is_desc         *mstrsec = NULL; /* Generated string merge section */
        Shdr            *mstr_shdr = NULL;
        Elf_Data        *mstr_data = NULL;
        size_t          data_size;
        Aliste          idx;
        uintptr_t       ret = 0;
        Boolean         placed = FALSE;

        /*
         * Pass 1.5: Add all strings from all mergeable input sections.
         *
         * The last section we find also serves as the template for our
         * replacement merged section, providing the section attributes, etc.
         */
        for (APLIST_TRAVERSE(osp->os_mstrisdescs, idx, isp)) {
                const char *str, *end;

                if (isdesc_discarded(isp))
                        continue;

                /*
                 * Input sections of 0 size are dubiously valid since they do
                 * not even contain the NUL string.  Ignore them.
                 */
                if (isp->is_shdr->sh_size == 0)
                        continue;

                if ((osp->os_mstrtab == NULL) &&
                    (osp->os_mstrtab = st_new(FLG_STNEW_COMPRESS)) == NULL) {
                        ret = S_ERROR;
                        goto out;
                }

                end = isp->is_indata->d_buf + isp->is_indata->d_size;
                for (str = isp->is_indata->d_buf; str < end;
                    str += strlen(str) + 1) {
                        if (st_insert(osp->os_mstrtab, str) != 0) {
                                ret = S_ERROR;
                                goto out;
                        }
                }
        }

        IMPLY(osp->os_mstrtab != NULL, isp != NULL);
        if (osp->os_mstrtab == NULL) {
                ret = 0;
                goto out;
        }

        /*
         * Get the size of the new input section. Requesting the string
         * table size "cooks" the table, and finalizes its contents.
         */
        data_size = st_getstrtab_sz(osp->os_mstrtab);

        /* Create a new input section to hold the merged strings */
        if (new_section_from_template(ofl, isp, data_size,
            &mstrsec, &mstr_shdr, &mstr_data) == S_ERROR) {
                ret = S_ERROR;
                goto out;
        }
        mstrsec->is_flags |= FLG_IS_GNSTRMRG;

        /*
         * Allocate a data buffer for the new input section, associate the
         * buffer with the string table descriptor, and fill it from the
         * string table.
         */
        if ((mstr_data->d_buf = libld_malloc(data_size)) == NULL) {
                ret = S_ERROR;
                goto out;
        }
        if ((st_setstrbuf(osp->os_mstrtab, mstr_data->d_buf,
            data_size) == -1)) {
                ret = S_ERROR;
                goto out;
        }

        st_setallstrings(osp->os_mstrtab);

        /* Add the new section to the output image */
        if (ld_place_section(ofl, mstrsec, NULL, osp->os_identndx, NULL) ==
            (Os_desc *)S_ERROR) {
                ret = S_ERROR;
                goto out;
        }
        placed = TRUE;

        /*
         * Pass 2:
         *
         * Revisit the relocation descriptors with STT_SECTION symbols
         * that were saved by the first pass. Update each relocation
         * record so that the offset it contains is for the new section
         * instead of the original.
         */
        for (APLIST_TRAVERSE(osp->os_mstrrels, idx, rsp)) {
                const char      *name;
                size_t          stoff;

                /*
                 * Find the string to the merged table's buffer and get its
                 * offset.
                 */
                name = strmerge_get_reloc_str(ofl, rsp);
                stoff = st_findstring(osp->os_mstrtab, name);
                VERIFY3S(stoff, !=, -1);

                /*
                 * Alter the relocation to access the string at the
                 * new offset in our new string table.
                 *
                 * For SHT_RELA platforms, it suffices to simply
                 * update the rel_raddend field of the relocation.
                 *
                 * For SHT_REL platforms, the new "addend" value
                 * needs to be written at the address being relocated.
                 * However, we can't alter the input sections which
                 * are mapped readonly, and the output image has not
                 * been created yet. So, we defer this operation,
                 * using the rel_raddend field of the relocation
                 * which is normally 0 on a REL platform, to pass the
                 * new "addend" value to ld_perform_outreloc() or
                 * ld_do_activerelocs(). The FLG_REL_NADDEND flag
                 * tells them that this is the case.
                 */
                if ((rsp->rel_flags & FLG_REL_RELA) == 0) {
                        /* REL */
                        rsp->rel_flags |= FLG_REL_NADDEND;
                }
                rsp->rel_raddend = (Sxword)stoff;

                /*
                 * Generate a symbol name string for STT_SECTION symbols
                 * that might reference our merged section. This shows up
                 * in debug output and helps show how the relocation has
                 * changed from its original input section to our merged
                 * one.
                 */
                if (ld_stt_section_sym_name(mstrsec) == NULL) {
                        ret = S_ERROR;
                        goto out;
                }
        }

        /*
         * Pass 3:
         *
         * Modify the symbols referenced by the relocation descriptors
         * so that they reference the new input section containing the
         * merged strings instead of the original input sections.
         */
        for (APLIST_TRAVERSE(osp->os_mstrsyms, idx, sdp)) {
                /*
                 * If we've already redirected this symbol to the merged data,
                 * don't do it again.  ld_gather_strmerge() uses a heuristic
                 * (relocations to the same symbol clump together) to avoid
                 * inserting a given symbol more than once, but repeat symbols
                 * in the list can occur.
                 */
                if ((sdp->sd_isc->is_flags & FLG_IS_INSTRMRG) == 0)
                        continue;

                if (ELF_ST_TYPE(sdp->sd_sym->st_info) != STT_SECTION) {
                        /*
                         * This is not an STT_SECTION symbol, so its
                         * value is the offset of the string within the
                         * input section. Update the address to reflect
                         * the address in our new merged section.
                         */
                        const char      *name;
                        size_t          stoff;

                        /*
                         * Find the string in the merged table's buffer and get
                         * its offset.
                         */
                        name = sdp->sd_sym->st_value +
                            (char *)sdp->sd_isc->is_indata->d_buf;
                        stoff = st_findstring(osp->os_mstrtab, name);
                        VERIFY3S(stoff, !=, -1);

                        if (ld_sym_copy(sdp) == S_ERROR) {
                                ret = S_ERROR;
                                goto out;
                        }
                        sdp->sd_sym->st_value = (Word)stoff;
                }

                /* Redirect the symbol to our new merged section */
                sdp->sd_isc = mstrsec;
        }

        /*
         * There are no references left to the original input string sections.
         * Mark them as discarded so they don't go into the output image.
         * At the same time, add up the sizes of the replaced sections.
         */
        data_size = 0;
        for (APLIST_TRAVERSE(osp->os_mstrisdescs, idx, isp)) {
                if (isp->is_flags & (FLG_IS_DISCARD | FLG_IS_GNSTRMRG))
                        continue;

                data_size += isp->is_indata->d_size;

                isp->is_flags |= FLG_IS_DISCARD;
                DBG_CALL(Dbg_sec_discarded(ofl->ofl_lml, isp, mstrsec));
        }

        /* Report how much space we saved in the output section */
        DBG_CALL(Dbg_sec_genstr_compress(ofl->ofl_lml, osp->os_name, data_size,
            mstr_data->d_size));

out:
        if ((ret == S_ERROR) && !placed) {
                libld_free(mstrsec);
                if (mstr_data != NULL)
                        libld_free(mstr_data->d_buf);
                libld_free(mstr_data);
                libld_free(mstr_shdr);
        }

        libld_free(osp->os_mstrsyms);
        osp->os_mstrsyms = NULL;
        libld_free(osp->os_mstrrels);
        osp->os_mstrrels = NULL;

        if (osp->os_mstrtab != NULL) {
                st_destroy(osp->os_mstrtab);
                osp->os_mstrtab = NULL;
        }

        return (ret);
}

/*
 * If any output section has SHF_MERGE|SHF_STRINGS input sections,
 * replace them with a single merged/compressed input section.
 *
 * entry:
 *      ofl - Output file descriptor
 *
 * exit:
 *      If section merging is possible, it is done. If no errors are
 *      encountered, 0 is returned. On error, S_ERROR is returned.
 *
 *      The contents of the string-merging specific members of any output
 *      section descriptor are undefined after this function returns.
 */
static uintptr_t
ld_make_strmerge(Ofl_desc *ofl)
{
        Sg_desc *sgp;
        Aliste idx1;

        if (ld_gather_strmerge(ofl, &ofl->ofl_actrels) == S_ERROR)
                return (S_ERROR);
        if (ld_gather_strmerge(ofl, &ofl->ofl_outrels) == S_ERROR)
                return (S_ERROR);

        for (APLIST_TRAVERSE(ofl->ofl_segs, idx1, sgp)) {
                Os_desc *osp;
                Aliste  idx2;

                for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) {
                        if (ld_strmerge_sec(ofl, osp) == S_ERROR)
                                return (S_ERROR);
                }
        }

        return (0);
}

/*
 * Update a data buffers size.  A number of sections have to be created, and
 * the sections header contributes to the size of the eventual section.  Thus,
 * a section may be created, and once all associated sections have been created,
 * we return to establish the required section size.
 */
inline static void
update_data_size(Os_desc *osp, ulong_t cnt)
{
        Is_desc         *isec = ld_os_first_isdesc(osp);
        Elf_Data        *data = isec->is_indata;
        Shdr            *shdr = osp->os_shdr;
        size_t          size = cnt * shdr->sh_entsize;

        shdr->sh_size = (Xword)size;
        data->d_size = size;
}

/*
 * The following sections are built after all input file processing and symbol
 * validation has been carried out.  The order is important (because the
 * addition of a section adds a new symbol there is a chicken and egg problem
 * of maintaining the appropriate counts).  By maintaining a known order the
 * individual routines can compensate for later, known, additions.
 */
uintptr_t
ld_make_sections(Ofl_desc *ofl)
{
        ofl_flag_t      flags = ofl->ofl_flags;
        Sg_desc         *sgp;

        /*
         * Generate any special sections.
         */
        if (flags & FLG_OF_ADDVERS)
                if (make_comment(ofl) == S_ERROR)
                        return (S_ERROR);

        if (make_interp(ofl) == S_ERROR)
                return (S_ERROR);

        /*
         * Create a capabilities section if required.
         */
        if (make_cap(ofl, SHT_SUNW_cap, MSG_ORIG(MSG_SCN_SUNWCAP),
            ld_targ.t_id.id_cap) == S_ERROR)
                return (S_ERROR);

        /*
         * Create any init/fini array sections.
         */
        if (make_array(ofl, SHT_INIT_ARRAY, MSG_ORIG(MSG_SCN_INITARRAY),
            ofl->ofl_initarray) == S_ERROR)
                return (S_ERROR);

        if (make_array(ofl, SHT_FINI_ARRAY, MSG_ORIG(MSG_SCN_FINIARRAY),
            ofl->ofl_finiarray) == S_ERROR)
                return (S_ERROR);

        if (make_array(ofl, SHT_PREINIT_ARRAY, MSG_ORIG(MSG_SCN_PREINITARRAY),
            ofl->ofl_preiarray) == S_ERROR)
                return (S_ERROR);

        /*
         * Make the .plt section.  This occurs after any other relocation
         * sections are generated (see reloc_init()) to ensure that the
         * associated relocation section is after all the other relocation
         * sections.
         */
        if ((ofl->ofl_pltcnt) || (ofl->ofl_pltpad))
                if (make_plt(ofl) == S_ERROR)
                        return (S_ERROR);

        /*
         * Determine whether any sections or files are not referenced.  Under
         * -Dunused a diagnostic for any unused components is generated, under
         * -zignore the component is removed from the final output.
         */
        if (DBG_ENABLED || (ofl->ofl_flags1 & FLG_OF1_IGNPRC)) {
                if (ignore_section_processing(ofl) == S_ERROR)
                        return (S_ERROR);
        }

        /*
         * If we have detected a situation in which previously placed
         * output sections may have been discarded, perform the necessary
         * readjustment.
         */
        if (ofl->ofl_flags & FLG_OF_ADJOSCNT)
                adjust_os_count(ofl);

        /*
         * Do any of the output sections contain input sections that
         * are candidates for string table merging? For each such case,
         * we create a replacement section, insert it, and discard the
         * originals.
         *
         * rel_alpp and sym_alpp are used by ld_make_strmerge()
         * for its internal processing. We are responsible for the
         * initialization and cleanup, and ld_make_strmerge() handles the rest.
         * This allows us to reuse a single pair of memory buffers, allocated
         * for this processing, for all the output sections.
         */
        if ((ofl->ofl_flags1 & FLG_OF1_NCSTTAB) == 0) {
                if (ld_make_strmerge(ofl) == S_ERROR)
                        return (S_ERROR);
        }

        /*
         * Add any necessary versioning information.
         */
        if (!(flags & FLG_OF_NOVERSEC)) {
                if ((flags & FLG_OF_VERNEED) &&
                    (make_verneed(ofl) == S_ERROR))
                        return (S_ERROR);
                if ((flags & FLG_OF_VERDEF) &&
                    (make_verdef(ofl) == S_ERROR))
                        return (S_ERROR);
                if ((flags & (FLG_OF_VERNEED | FLG_OF_VERDEF)) &&
                    ((ofl->ofl_osversym = make_sym_sec(ofl,
                    MSG_ORIG(MSG_SCN_SUNWVERSYM), SHT_SUNW_versym,
                    ld_targ.t_id.id_version)) == (Os_desc*)S_ERROR))
                        return (S_ERROR);
        }

        /*
         * Create a syminfo section if necessary.
         */
        if (flags & FLG_OF_SYMINFO) {
                if ((ofl->ofl_ossyminfo = make_sym_sec(ofl,
                    MSG_ORIG(MSG_SCN_SUNWSYMINFO), SHT_SUNW_syminfo,
                    ld_targ.t_id.id_syminfo)) == (Os_desc *)S_ERROR)
                        return (S_ERROR);
        }

        if (flags & FLG_OF_COMREL) {
                /*
                 * If -zcombreloc is enabled then all relocations (except for
                 * the PLT's) are coalesced into a single relocation section.
                 */
                if (ofl->ofl_reloccnt) {
                        if (make_reloc(ofl, NULL) == S_ERROR)
                                return (S_ERROR);
                }
        } else {
                Aliste  idx1;

                /*
                 * Create the required output relocation sections.  Note, new
                 * sections may be added to the section list that is being
                 * traversed.  These insertions can move the elements of the
                 * Alist such that a section descriptor is re-read.  Recursion
                 * is prevented by maintaining a previous section pointer and
                 * insuring that this pointer isn't re-examined.
                 */
                for (APLIST_TRAVERSE(ofl->ofl_segs, idx1, sgp)) {
                        Os_desc *osp, *posp = 0;
                        Aliste  idx2;

                        for (APLIST_TRAVERSE(sgp->sg_osdescs, idx2, osp)) {
                                if ((osp != posp) && osp->os_szoutrels &&
                                    (osp != ofl->ofl_osplt)) {
                                        if (make_reloc(ofl, osp) == S_ERROR)
                                                return (S_ERROR);
                                }
                                posp = osp;
                        }
                }

                /*
                 * If we're not building a combined relocation section, then
                 * build a .rel[a] section as required.
                 */
                if (ofl->ofl_relocrelsz) {
                        if (make_reloc(ofl, NULL) == S_ERROR)
                                return (S_ERROR);
                }
        }

        /*
         * The PLT relocations are always in their own section, and we try to
         * keep them at the end of the PLT table.  We do this to keep the hot
         * "data" PLT's at the head of the table nearer the .dynsym & .hash.
         */
        if (ofl->ofl_osplt && ofl->ofl_relocpltsz) {
                if (make_reloc(ofl, ofl->ofl_osplt) == S_ERROR)
                        return (S_ERROR);
        }

        /*
         * Finally build the symbol and section header sections.
         */
        if (flags & FLG_OF_DYNAMIC) {
                if (make_dynamic(ofl) == S_ERROR)
                        return (S_ERROR);

                /*
                 * A number of sections aren't necessary within a relocatable
                 * object, even if -dy has been used.
                 */
                if (!(flags & FLG_OF_RELOBJ)) {
                        if (make_hash(ofl) == S_ERROR)
                                return (S_ERROR);
                        if (make_dynstr(ofl) == S_ERROR)
                                return (S_ERROR);
                        if (make_dynsym(ofl) == S_ERROR)
                                return (S_ERROR);
                        if (ld_unwind_make_hdr(ofl) == S_ERROR)
                                return (S_ERROR);
                        if (make_dynsort(ofl) == S_ERROR)
                                return (S_ERROR);
                }
        }

        if (!(flags & FLG_OF_STRIP) || (flags & FLG_OF_RELOBJ) ||
            ((flags & FLG_OF_STATIC) && ofl->ofl_osversym)) {
                /*
                 * Do we need to make a SHT_SYMTAB_SHNDX section
                 * for the dynsym.  If so - do it now.
                 */
                if (ofl->ofl_osdynsym &&
                    ((ofl->ofl_shdrcnt + 3) >= SHN_LORESERVE)) {
                        if (make_dynsym_shndx(ofl) == S_ERROR)
                                return (S_ERROR);
                }

                if (make_strtab(ofl) == S_ERROR)
                        return (S_ERROR);
                if (make_symtab(ofl) == S_ERROR)
                        return (S_ERROR);
        } else {
                /*
                 * Do we need to make a SHT_SYMTAB_SHNDX section
                 * for the dynsym.  If so - do it now.
                 */
                if (ofl->ofl_osdynsym &&
                    ((ofl->ofl_shdrcnt + 1) >= SHN_LORESERVE)) {
                        if (make_dynsym_shndx(ofl) == S_ERROR)
                                return (S_ERROR);
                }
        }

        if (make_shstrtab(ofl) == S_ERROR)
                return (S_ERROR);

        /*
         * Now that we've created all output sections, adjust the size of the
         * SHT_SUNW_versym and SHT_SUNW_syminfo section, which are dependent on
         * the associated symbol table sizes.
         */
        if (ofl->ofl_osversym || ofl->ofl_ossyminfo) {
                ulong_t         cnt;
                Is_desc         *isp;
                Os_desc         *osp;

                if (OFL_IS_STATIC_OBJ(ofl))
                        osp = ofl->ofl_ossymtab;
                else
                        osp = ofl->ofl_osdynsym;

                isp = ld_os_first_isdesc(osp);
                cnt = (isp->is_shdr->sh_size / isp->is_shdr->sh_entsize);

                if (ofl->ofl_osversym)
                        update_data_size(ofl->ofl_osversym, cnt);

                if (ofl->ofl_ossyminfo)
                        update_data_size(ofl->ofl_ossyminfo, cnt);
        }

        /*
         * Now that we've created all output sections, adjust the size of the
         * SHT_SUNW_capinfo, which is dependent on the associated symbol table
         * size.
         */
        if (ofl->ofl_oscapinfo) {
                ulong_t cnt;

                /*
                 * Symbol capabilities symbols are placed directly after the
                 * STT_FILE symbol, section symbols, and any register symbols.
                 * Effectively these are the first of any series of demoted
                 * (scoped) symbols.
                 */
                if (OFL_IS_STATIC_OBJ(ofl))
                        cnt = SYMTAB_ALL_CNT(ofl);
                else
                        cnt = DYNSYM_ALL_CNT(ofl);

                update_data_size(ofl->ofl_oscapinfo, cnt);
        }
        return (1);
}

/*
 * Build an additional data section - used to back OBJT symbol definitions
 * added with a mapfile.
 */
Is_desc *
ld_make_data(Ofl_desc *ofl, size_t size)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;

        if (new_section(ofl, SHT_PROGBITS, MSG_ORIG(MSG_SCN_DATA), 0,
            &isec, &shdr, &data) == S_ERROR)
                return ((Is_desc *)S_ERROR);

        data->d_size = size;
        shdr->sh_size = (Xword)size;
        shdr->sh_flags |= SHF_WRITE;

        if (aplist_append(&ofl->ofl_mapdata, isec, AL_CNT_OFL_MAPSECS) == NULL)
                return ((Is_desc *)S_ERROR);

        return (isec);
}

/*
 * Build an additional text section - used to back FUNC symbol definitions
 * added with a mapfile.
 */
Is_desc *
ld_make_text(Ofl_desc *ofl, size_t size)
{
        Shdr            *shdr;
        Elf_Data        *data;
        Is_desc         *isec;

        /*
         * Insure the size is sufficient to contain the minimum return
         * instruction.
         */
        if (size < ld_targ.t_nf.nf_size)
                size = ld_targ.t_nf.nf_size;

        if (new_section(ofl, SHT_PROGBITS, MSG_ORIG(MSG_SCN_TEXT), 0,
            &isec, &shdr, &data) == S_ERROR)
                return ((Is_desc *)S_ERROR);

        data->d_size = size;
        shdr->sh_size = (Xword)size;
        shdr->sh_flags |= SHF_EXECINSTR;

        /*
         * Fill the buffer with the appropriate return instruction.
         * Note that there is no need to swap bytes on a non-native,
         * link, as the data being copied is given in bytes.
         */
        if ((data->d_buf = libld_calloc(size, 1)) == NULL)
                return ((Is_desc *)S_ERROR);
        (void) memcpy(data->d_buf, ld_targ.t_nf.nf_template,
            ld_targ.t_nf.nf_size);

        /*
         * If size was larger than required, and the target supplies
         * a fill function, use it to fill the balance. If there is no
         * fill function, we accept the 0-fill supplied by libld_calloc().
         */
        if ((ld_targ.t_ff.ff_execfill != NULL) && (size > ld_targ.t_nf.nf_size))
                ld_targ.t_ff.ff_execfill(data->d_buf, ld_targ.t_nf.nf_size,
                    size - ld_targ.t_nf.nf_size);

        if (aplist_append(&ofl->ofl_maptext, isec, AL_CNT_OFL_MAPSECS) == NULL)
                return ((Is_desc *)S_ERROR);

        return (isec);
}

void
ld_comdat_validate(Ofl_desc *ofl, Ifl_desc *ifl)
{
        int i;

        for (i = 0; i < ifl->ifl_shnum; i++) {
                Is_desc *isp = ifl->ifl_isdesc[i];
                int types = 0;
                char buf[1024] = "";
                Group_desc *gr = NULL;

                if ((isp == NULL) || (isp->is_flags & FLG_IS_COMDAT) == 0)
                        continue;

                if (isp->is_shdr->sh_type == SHT_SUNW_COMDAT) {
                        types++;
                        (void) strlcpy(buf, MSG_ORIG(MSG_STR_SUNW_COMDAT),
                            sizeof (buf));
                }

                if (strncmp(MSG_ORIG(MSG_SCN_GNU_LINKONCE), isp->is_name,
                    MSG_SCN_GNU_LINKONCE_SIZE) == 0) {
                        types++;
                        if (types > 1)
                                (void) strlcat(buf, ", ", sizeof (buf));
                        (void) strlcat(buf, MSG_ORIG(MSG_SCN_GNU_LINKONCE),
                            sizeof (buf));
                }

                if ((isp->is_shdr->sh_flags & SHF_GROUP) &&
                    ((gr = ld_get_group(ofl, isp)) != NULL) &&
                    (gr->gd_data[0] & GRP_COMDAT)) {
                        types++;
                        if (types > 1)
                                (void) strlcat(buf, ", ", sizeof (buf));
                        (void) strlcat(buf, MSG_ORIG(MSG_STR_GROUP),
                            sizeof (buf));
                }

                if (types > 1)
                        ld_eprintf(ofl, ERR_FATAL,
                            MSG_INTL(MSG_SCN_MULTICOMDAT), ifl->ifl_name,
                            EC_WORD(isp->is_scnndx), isp->is_name, buf);
        }
}