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# This shell script emits a C file. -*- C -*-# It does some substitutions.# This file is now misnamed, because it supports both 32 bit and 64 bit# ELF emulations.test -z "${ELFSIZE}" && ELFSIZE=32if [ -z "$MACHINE" ]; thenOUTPUT_ARCH=${ARCH}elseOUTPUT_ARCH=${ARCH}:${MACHINE}fifragment <<EOF/* This file is is generated by a shell script. DO NOT EDIT! *//* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011Free Software Foundation, Inc.Written by Steve Chamberlain <sac@cygnus.com>ELF support by Ian Lance Taylor <ian@cygnus.com>This file is part of the GNU Binutils.This program is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe Free Software Foundation; either version 3 of the License, or(at your option) any later version.This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See theGNU General Public License for more details.You should have received a copy of the GNU General Public Licensealong with this program; if not, write to the Free SoftwareFoundation, Inc., 51 Franklin Street - Fifth Floor, Boston,MA 02110-1301, USA. */#define TARGET_IS_${EMULATION_NAME}#include "sysdep.h"#include "bfd.h"#include "libiberty.h"#include "filenames.h"#include "safe-ctype.h"#include "getopt.h"#include "md5.h"#include "sha1.h"#include <fcntl.h>#include "bfdlink.h"#include "ld.h"#include "ldmain.h"#include "ldmisc.h"#include "ldexp.h"#include "ldlang.h"#include "ldfile.h"#include "ldemul.h"#include <ldgram.h>#include "elf/common.h"#include "elf-bfd.h"#include "filenames.h"/* Declare functions used by various EXTRA_EM_FILEs. */static void gld${EMULATION_NAME}_before_parse (void);static void gld${EMULATION_NAME}_after_open (void);static void gld${EMULATION_NAME}_before_allocation (void);static void gld${EMULATION_NAME}_after_allocation (void);static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan(asection *, const char *, int);EOFif [ "x${USE_LIBPATH}" = xyes ] ; thencase ${target} in*-*-linux-* | *-*-k*bsd*-*)fragment <<EOF#ifdef HAVE_GLOB#include <glob.h>#endifEOF;;esacfi# Import any needed special functions and/or overrides.#source_em ${srcdir}/emultempl/elf-generic.emif test -n "$EXTRA_EM_FILE" ; thensource_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.emfi# Functions in this file can be overridden by setting the LDEMUL_* shell# variables. If the name of the overriding function is the same as is# defined in this file, then don't output this file's version.# If a different overriding name is given then output the standard function# as presumably it is called from the overriding function.#if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; thenfragment <<EOFstatic voidgld${EMULATION_NAME}_before_parse (void){ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);config.dynamic_link = ${DYNAMIC_LINK-TRUE};config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;}EOFfiif test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; thenfragment <<EOF/* Handle the generation of DT_NEEDED tags. */static bfd_booleangld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry){int link_class = 0;/* Tell the ELF linker that we don't want the output file to have aDT_NEEDED entry for this file, unless it is used to resolvereferences in a regular object. */if (entry->add_DT_NEEDED_for_regular)link_class = DYN_AS_NEEDED;/* Tell the ELF linker that we don't want the output file to have aDT_NEEDED entry for any dynamic library in DT_NEEDED tags fromthis file at all. */if (!entry->add_DT_NEEDED_for_dynamic)link_class |= DYN_NO_ADD_NEEDED;if (entry->just_syms_flag&& (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),entry->the_bfd);if (link_class == 0|| (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)return FALSE;bfd_elf_set_dyn_lib_class (entry->the_bfd,(enum dynamic_lib_link_class) link_class);/* Continue on with normal load_symbols processing. */return FALSE;}EOFfifragment <<EOF/* These variables are required to pass information back and forthbetween after_open and check_needed and stat_needed and vercheck. */static struct bfd_link_needed_list *global_needed;static struct stat global_stat;static lang_input_statement_type *global_found;static struct bfd_link_needed_list *global_vercheck_needed;static bfd_boolean global_vercheck_failed;/* These variables are used to implement target options */static char *audit; /* colon (typically) separated list of libs */static char *depaudit; /* colon (typically) separated list of libs *//* On Linux, it's possible to have different versions of the sameshared library linked against different versions of libc. Thedynamic linker somehow tags which libc version to use in/etc/ld.so.cache, and, based on the libc that it sees in theexecutable, chooses which version of the shared library to use.We try to do a similar check here by checking whether this sharedlibrary needs any other shared libraries which may conflict withlibraries we have already included in the link. If it does, weskip it, and try to find another shared library farther on down thelink path.This is called via lang_for_each_input_file.GLOBAL_VERCHECK_NEEDED is the list of objects needed by the objectwhich we are checking. This sets GLOBAL_VERCHECK_FAILED if we finda conflicting version. */static voidgld${EMULATION_NAME}_vercheck (lang_input_statement_type *s){const char *soname;struct bfd_link_needed_list *l;if (global_vercheck_failed)return;if (s->the_bfd == NULL|| (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)return;soname = bfd_elf_get_dt_soname (s->the_bfd);if (soname == NULL)soname = lbasename (bfd_get_filename (s->the_bfd));for (l = global_vercheck_needed; l != NULL; l = l->next){const char *suffix;if (filename_cmp (soname, l->name) == 0){/* Probably can't happen, but it's an easy check. */continue;}if (strchr (l->name, '/') != NULL)continue;suffix = strstr (l->name, ".so.");if (suffix == NULL)continue;suffix += sizeof ".so." - 1;if (filename_ncmp (soname, l->name, suffix - l->name) == 0){/* Here we know that S is a dynamic object FOO.SO.VER1, andthe object we are considering needs a dynamic objectFOO.SO.VER2, and VER1 and VER2 are different. Thisappears to be a version mismatch, so we tell the callerto try a different version of this library. */global_vercheck_failed = TRUE;return;}}}/* See if an input file matches a DT_NEEDED entry by running stat onthe file. */static voidgld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s){struct stat st;const char *suffix;const char *soname;if (global_found != NULL)return;if (s->the_bfd == NULL)return;/* If this input file was an as-needed entry, and wasn't found to beneeded at the stage it was linked, then don't say we have loaded it. */if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)return;if (bfd_stat (s->the_bfd, &st) != 0){einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);return;}/* Some operating systems, e.g. Windows, do not provide a meaningfulst_ino; they always set it to zero. (Windows does provide ameaningful st_dev.) Do not indicate a duplicate library in thatcase. While there is no guarantee that a system that providesmeaningful inode numbers will never set st_ino to zero, this ismerely an optimization, so we do not need to worry about falsenegatives. */if (st.st_dev == global_stat.st_dev&& st.st_ino == global_stat.st_ino&& st.st_ino != 0){global_found = s;return;}/* We issue a warning if it looks like we are including twodifferent versions of the same shared library. For example,there may be a problem if -lc picks up libc.so.6 but some othershared library has a DT_NEEDED entry of libc.so.5. This is aheuristic test, and it will only work if the name looks likeNAME.so.VERSION. FIXME: Depending on file names is error-prone.If we really want to issue warnings about mixing version numbersof shared libraries, we need to find a better way. */if (strchr (global_needed->name, '/') != NULL)return;suffix = strstr (global_needed->name, ".so.");if (suffix == NULL)return;suffix += sizeof ".so." - 1;soname = bfd_elf_get_dt_soname (s->the_bfd);if (soname == NULL)soname = lbasename (s->filename);if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0)einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",global_needed->name, global_needed->by, soname);}struct dt_needed{bfd *by;const char *name;};/* This function is called for each possible name for a dynamic objectnamed by a DT_NEEDED entry. The FORCE parameter indicates whetherto skip the check for a conflicting version. */static bfd_booleangld${EMULATION_NAME}_try_needed (struct dt_needed *needed,int force){bfd *abfd;const char *name = needed->name;const char *soname;int link_class;abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));if (abfd == NULL)return FALSE;/* Linker needs to decompress sections. */abfd->flags |= BFD_DECOMPRESS;if (! bfd_check_format (abfd, bfd_object)){bfd_close (abfd);return FALSE;}if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0){bfd_close (abfd);return FALSE;}/* For DT_NEEDED, they have to match. */if (abfd->xvec != link_info.output_bfd->xvec){bfd_close (abfd);return FALSE;}/* Check whether this object would include any conflicting libraryversions. If FORCE is set, then we skip this check; we use thisthe second time around, if we couldn't find any compatibleinstance of the shared library. */if (! force){struct bfd_link_needed_list *needs;if (! bfd_elf_get_bfd_needed_list (abfd, &needs))einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);if (needs != NULL){global_vercheck_needed = needs;global_vercheck_failed = FALSE;lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);if (global_vercheck_failed){bfd_close (abfd);/* Return FALSE to force the caller to move on to tryanother file on the search path. */return FALSE;}/* But wait! It gets much worse. On Linux, if a sharedlibrary does not use libc at all, we are supposed to skipit the first time around in case we encounter a sharedlibrary later on with the same name which does use theversion of libc that we want. This is much too horribleto use on any system other than Linux. */EOFcase ${target} in*-*-linux-* | *-*-k*bsd*-*)fragment <<EOF{struct bfd_link_needed_list *l;for (l = needs; l != NULL; l = l->next)if (CONST_STRNEQ (l->name, "libc.so"))break;if (l == NULL){bfd_close (abfd);return FALSE;}}EOF;;esacfragment <<EOF}}/* We've found a dynamic object matching the DT_NEEDED entry. *//* We have already checked that there is no other input file of thesame name. We must now check again that we are not including thesame file twice. We need to do this because on many systemslibc.so is a symlink to, e.g., libc.so.1. The SONAME entry willreference libc.so.1. If we have already included libc.so, wedon't want to include libc.so.1 if they are the same file, and wecan only check that using stat. */if (bfd_stat (abfd, &global_stat) != 0)einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);/* First strip off everything before the last '/'. */soname = lbasename (abfd->filename);if (trace_file_tries)info_msg (_("found %s at %s\n"), soname, name);global_found = NULL;lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);if (global_found != NULL){/* Return TRUE to indicate that we found the file, even thoughwe aren't going to do anything with it. */return TRUE;}/* Specify the soname to use. */bfd_elf_set_dt_needed_name (abfd, soname);/* Tell the ELF linker that we don't want the output file to have aDT_NEEDED entry for this file, unless it is used to resolvereferences in a regular object. */link_class = DYN_DT_NEEDED;/* Tell the ELF linker that we don't want the output file to have aDT_NEEDED entry for this file at all if the entry is from a filewith DYN_NO_ADD_NEEDED. */if (needed->by != NULL&& (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class);/* Add this file into the symbol table. */if (! bfd_link_add_symbols (abfd, &link_info))einfo ("%F%B: could not read symbols: %E\n", abfd);return TRUE;}/* Search for a needed file in a path. */static bfd_booleangld${EMULATION_NAME}_search_needed (const char *path,struct dt_needed *n, int force){const char *s;const char *name = n->name;size_t len;struct dt_needed needed;if (name[0] == '/')return gld${EMULATION_NAME}_try_needed (n, force);if (path == NULL || *path == '\0')return FALSE;needed.by = n->by;needed.name = n->name;len = strlen (name);while (1){char *filename, *sset;s = strchr (path, config.rpath_separator);if (s == NULL)s = path + strlen (path);#if HAVE_DOS_BASED_FILE_SYSTEM/* Assume a match on the second char is part of drive specifier. */else if (config.rpath_separator == ':'&& s == path + 1&& ISALPHA (*path)){s = strchr (s + 1, config.rpath_separator);if (s == NULL)s = path + strlen (path);}#endiffilename = (char *) xmalloc (s - path + len + 2);if (s == path)sset = filename;else{memcpy (filename, path, s - path);filename[s - path] = '/';sset = filename + (s - path) + 1;}strcpy (sset, name);needed.name = filename;if (gld${EMULATION_NAME}_try_needed (&needed, force))return TRUE;free (filename);if (*s == '\0')break;path = s + 1;}return FALSE;}EOFif [ "x${USE_LIBPATH}" = xyes ] ; thenfragment <<EOF/* Add the sysroot to every entry in a path separated byconfig.rpath_separator. */static char *gld${EMULATION_NAME}_add_sysroot (const char *path){int len, colons, i;char *ret, *p;len = strlen (path);colons = 0;i = 0;while (path[i])if (path[i++] == config.rpath_separator)colons++;if (path[i])colons++;len = len + (colons + 1) * strlen (ld_sysroot);ret = xmalloc (len + 1);strcpy (ret, ld_sysroot);p = ret + strlen (ret);i = 0;while (path[i])if (path[i] == config.rpath_separator){*p++ = path[i++];strcpy (p, ld_sysroot);p = p + strlen (p);}else*p++ = path[i++];*p = 0;return ret;}EOFcase ${target} in*-*-freebsd* | *-*-dragonfly*)fragment <<EOF/* Read the system search path the FreeBSD way rather than the Linux way. */#ifdef HAVE_ELF_HINTS_H#include <elf-hints.h>#else#include "elf-hints-local.h"#endifstatic bfd_booleangld${EMULATION_NAME}_check_ld_elf_hints (const char *name, int force){static bfd_boolean initialized;static char *ld_elf_hints;struct dt_needed needed;if (!initialized){FILE *f;char *tmppath;tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);f = fopen (tmppath, FOPEN_RB);free (tmppath);if (f != NULL){struct elfhints_hdr hdr;if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)&& hdr.magic == ELFHINTS_MAGIC&& hdr.version == 1){if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1){char *b;b = xmalloc (hdr.dirlistlen + 1);if (fread (b, 1, hdr.dirlistlen + 1, f) ==hdr.dirlistlen + 1)ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);free (b);}}fclose (f);}initialized = TRUE;}if (ld_elf_hints == NULL)return FALSE;needed.by = NULL;needed.name = name;return gld${EMULATION_NAME}_search_needed (ld_elf_hints, & needed,force);}EOF# FreeBSD;;*-*-linux-* | *-*-k*bsd*-*)fragment <<EOF/* For a native linker, check the file /etc/ld.so.conf for directoriesin which we may find shared libraries. /etc/ld.so.conf is reallyonly meaningful on Linux. */struct gld${EMULATION_NAME}_ld_so_conf{char *path;size_t len, alloc;};static bfd_booleangld${EMULATION_NAME}_parse_ld_so_conf(struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);static voidgld${EMULATION_NAME}_parse_ld_so_conf_include(struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,const char *pattern){char *newp = NULL;#ifdef HAVE_GLOBglob_t gl;#endifif (pattern[0] != '/'){char *p = strrchr (filename, '/');size_t patlen = strlen (pattern) + 1;newp = xmalloc (p - filename + 1 + patlen);memcpy (newp, filename, p - filename + 1);memcpy (newp + (p - filename + 1), pattern, patlen);pattern = newp;}#ifdef HAVE_GLOBif (glob (pattern, 0, NULL, &gl) == 0){size_t i;for (i = 0; i < gl.gl_pathc; ++i)gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);globfree (&gl);}#else/* If we do not have glob, treat the pattern as a literal filename. */gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);#endifif (newp)free (newp);}static bfd_booleangld${EMULATION_NAME}_parse_ld_so_conf(struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename){FILE *f = fopen (filename, FOPEN_RT);char *line;size_t linelen;if (f == NULL)return FALSE;linelen = 256;line = xmalloc (linelen);do{char *p = line, *q;/* Normally this would use getline(3), but we need to be portable. */while ((q = fgets (p, linelen - (p - line), f)) != NULL&& strlen (q) == linelen - (p - line) - 1&& line[linelen - 2] != '\n'){line = xrealloc (line, 2 * linelen);p = line + linelen - 1;linelen += linelen;}if (q == NULL && p == line)break;p = strchr (line, '\n');if (p)*p = '\0';/* Because the file format does not know any form of quoting wecan search forward for the next '#' character and if foundmake it terminating the line. */p = strchr (line, '#');if (p)*p = '\0';/* Remove leading whitespace. NUL is no whitespace character. */p = line;while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')++p;/* If the line is blank it is ignored. */if (p[0] == '\0')continue;if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t')){char *dir, c;p += 8;do{while (*p == ' ' || *p == '\t')++p;if (*p == '\0')break;dir = p;while (*p != ' ' && *p != '\t' && *p)++p;c = *p;*p++ = '\0';if (dir[0] != '\0')gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,dir);}while (c != '\0');}else{char *dir = p;while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'&& *p != '\r' && *p != '\v')++p;while (p != dir && p[-1] == '/')--p;if (info->path == NULL){info->alloc = p - dir + 1 + 256;info->path = xmalloc (info->alloc);info->len = 0;}else{if (info->len + 1 + (p - dir) >= info->alloc){info->alloc += p - dir + 256;info->path = xrealloc (info->path, info->alloc);}info->path[info->len++] = config.rpath_separator;}memcpy (info->path + info->len, dir, p - dir);info->len += p - dir;info->path[info->len] = '\0';}}while (! feof (f));free (line);fclose (f);return TRUE;}static bfd_booleangld${EMULATION_NAME}_check_ld_so_conf (const char *name, int force){static bfd_boolean initialized;static char *ld_so_conf;struct dt_needed needed;if (! initialized){char *tmppath;struct gld${EMULATION_NAME}_ld_so_conf info;info.path = NULL;info.len = info.alloc = 0;tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",(const char *) NULL);if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath)){free (tmppath);tmppath = concat (ld_sysroot, "/etc/ld.so.conf",(const char *) NULL);gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);}free (tmppath);if (info.path){char *d = gld${EMULATION_NAME}_add_sysroot (info.path);free (info.path);ld_so_conf = d;}initialized = TRUE;}if (ld_so_conf == NULL)return FALSE;needed.by = NULL;needed.name = name;return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);}EOF# Linux;;esacfifragment <<EOF/* See if an input file matches a DT_NEEDED entry by name. */static voidgld${EMULATION_NAME}_check_needed (lang_input_statement_type *s){const char *soname;/* Stop looking if we've found a loaded lib. */if (global_found != NULL&& (bfd_elf_get_dyn_lib_class (global_found->the_bfd)& DYN_AS_NEEDED) == 0)return;if (s->filename == NULL || s->the_bfd == NULL)return;/* Don't look for a second non-loaded as-needed lib. */if (global_found != NULL&& (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)return;if (filename_cmp (s->filename, global_needed->name) == 0){global_found = s;return;}if (s->search_dirs_flag){const char *f = strrchr (s->filename, '/');if (f != NULL&& filename_cmp (f + 1, global_needed->name) == 0){global_found = s;return;}}soname = bfd_elf_get_dt_soname (s->the_bfd);if (soname != NULL&& filename_cmp (soname, global_needed->name) == 0){global_found = s;return;}}EOFif test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; thenfragment <<EOFstatic bfd_size_typegld${EMULATION_NAME}_id_note_section_size (bfd *abfd,struct bfd_link_info *linfo){const char *style = linfo->emit_note_gnu_build_id;bfd_size_type size;abfd = abfd;size = offsetof (Elf_External_Note, name[sizeof "GNU"]);size = (size + 3) & -(bfd_size_type) 4;if (!strcmp (style, "md5") || !strcmp (style, "uuid"))size += 128 / 8;else if (!strcmp (style, "sha1"))size += 160 / 8;else if (!strncmp (style, "0x", 2)){/* ID is in string form (hex). Convert to bits. */const char *id = style + 2;do{if (ISXDIGIT (id[0]) && ISXDIGIT (id[1])){++size;id += 2;}else if (*id == '-' || *id == ':')++id;else{size = 0;break;}} while (*id != '\0');}elsesize = 0;return size;}static unsigned charread_hex (const char xdigit){if (ISDIGIT (xdigit))return xdigit - '0';if (ISUPPER (xdigit))return xdigit - 'A' + 0xa;if (ISLOWER (xdigit))return xdigit - 'a' + 0xa;abort ();return 0;}struct build_id_info{const char *style;asection *sec;};static bfd_booleangld${EMULATION_NAME}_write_build_id_section (bfd *abfd){const struct elf_backend_data *bed = get_elf_backend_data (abfd);struct build_id_info *info = (struct build_id_info *)elf_tdata (abfd)->after_write_object_contents_info;asection *asec;Elf_Internal_Shdr *i_shdr;unsigned char *contents, *id_bits;bfd_size_type size;Elf_External_Note *e_note;asec = info->sec;if (bfd_is_abs_section (asec->output_section)){einfo (_("%P: warning: .note.gnu.build-id section discarded,"" --build-id ignored.\n"));return TRUE;}i_shdr = &elf_section_data (asec->output_section)->this_hdr;if (i_shdr->contents == NULL){if (asec->contents == NULL)asec->contents = (unsigned char *) xmalloc (asec->size);contents = asec->contents;}elsecontents = i_shdr->contents + asec->output_offset;e_note = (Elf_External_Note *) contents;size = offsetof (Elf_External_Note, name[sizeof "GNU"]);size = (size + 3) & -(bfd_size_type) 4;id_bits = contents + size;size = asec->size - size;bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);bfd_h_put_32 (abfd, size, &e_note->descsz);bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type);memcpy (e_note->name, "GNU", sizeof "GNU");if (!strcmp (info->style, "md5")){struct md5_ctx ctx;md5_init_ctx (&ctx);if (bed->s->checksum_contents (abfd,(void (*) (const void *, size_t, void *))&md5_process_bytes,&ctx))md5_finish_ctx (&ctx, id_bits);elsereturn FALSE;}else if (!strcmp (info->style, "sha1")){struct sha1_ctx ctx;sha1_init_ctx (&ctx);if (bed->s->checksum_contents (abfd,(void (*) (const void *, size_t, void *))&sha1_process_bytes,&ctx))sha1_finish_ctx (&ctx, id_bits);elsereturn FALSE;}else if (!strcmp (info->style, "uuid")){int n;int fd = open ("/dev/urandom", O_RDONLY);if (fd < 0)return FALSE;n = read (fd, id_bits, size);close (fd);if (n < (int) size)return FALSE;}else if (!strncmp (info->style, "0x", 2)){/* ID is in string form (hex). Convert to bits. */const char *id = info->style + 2;size_t n = 0;do{if (ISXDIGIT (id[0]) && ISXDIGIT (id[1])){id_bits[n] = read_hex (*id++) << 4;id_bits[n++] |= read_hex (*id++);}else if (*id == '-' || *id == ':')++id;elseabort (); /* Should have been validated earlier. */} while (*id != '\0');}elseabort (); /* Should have been validated earlier. */size = asec->size;return (bfd_seek (abfd,i_shdr->sh_offset + asec->output_offset, SEEK_SET) == 0&& bfd_bwrite (contents, size, abfd) == size);}/* This is called after all the input files have been opened. */static voidgld${EMULATION_NAME}_after_open (void){struct bfd_link_needed_list *needed, *l;struct elf_link_hash_table *htab;after_open_default ();htab = elf_hash_table (&link_info);if (!is_elf_hash_table (htab))return;if (link_info.emit_note_gnu_build_id){bfd *abfd;asection *s;bfd_size_type size;/* Find an ELF input. */for (abfd = link_info.input_bfds;abfd != (bfd *) NULL; abfd = abfd->link_next)if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)break;if (abfd == NULL){/* PR 10555: If there are no input files do nottry to create a .note.gnu-build-id section. */free (link_info.emit_note_gnu_build_id);link_info.emit_note_gnu_build_id = NULL;}else{size = gld${EMULATION_NAME}_id_note_section_size (abfd, &link_info);if (size == 0){einfo ("%P: warning: unrecognized --build-id style ignored.\n");free (link_info.emit_note_gnu_build_id);link_info.emit_note_gnu_build_id = NULL;}else{s = bfd_make_section_with_flags (abfd, ".note.gnu.build-id",SEC_ALLOC | SEC_LOAD| SEC_IN_MEMORY | SEC_LINKER_CREATED| SEC_READONLY | SEC_DATA);if (s != NULL && bfd_set_section_alignment (abfd, s, 2)){struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);struct build_id_info *b =(struct build_id_info *) xmalloc (sizeof *b);b->style = link_info.emit_note_gnu_build_id;b->sec = s;elf_section_type (s) = SHT_NOTE;s->size = size;t->after_write_object_contents= &gld${EMULATION_NAME}_write_build_id_section;t->after_write_object_contents_info = b;}else{einfo ("%P: warning: Cannot create .note.gnu.build-id section,"" --build-id ignored.\n");free (link_info.emit_note_gnu_build_id);link_info.emit_note_gnu_build_id = NULL;}}}}if (link_info.relocatable)return;if (link_info.eh_frame_hdr&& !link_info.traditional_format){bfd *abfd, *elfbfd = NULL;bfd_boolean warn_eh_frame = FALSE;asection *s;for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next){if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)elfbfd = abfd;if (!warn_eh_frame){s = bfd_get_section_by_name (abfd, ".eh_frame");warn_eh_frame= (s&& s->size > 8&& !bfd_is_abs_section (s->output_section));}if (elfbfd && warn_eh_frame)break;}if (elfbfd){const struct elf_backend_data *bed;bed = get_elf_backend_data (elfbfd);s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr",bed->dynamic_sec_flags| SEC_READONLY);if (s != NULL&& bfd_set_section_alignment (elfbfd, s, 2)){htab->eh_info.hdr_sec = s;warn_eh_frame = FALSE;}}if (warn_eh_frame)einfo ("%P: warning: Cannot create .eh_frame_hdr section,"" --eh-frame-hdr ignored.\n");}/* Get the list of files which appear in DT_NEEDED entries indynamic objects included in the link (often there will be none).For each such file, we want to track down the correspondinglibrary, and include the symbol table in the link. This is whatthe runtime dynamic linker will do. Tracking the files down herepermits one dynamic object to include another without requiringspecial action by the person doing the link. Note that theneeded list can actually grow while we are stepping through thisloop. */if (!link_info.executable)return;needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info);for (l = needed; l != NULL; l = l->next){struct bfd_link_needed_list *ll;struct dt_needed n, nn;int force;/* If the lib that needs this one was --as-needed and wasn'tfound to be needed, then this lib isn't needed either. */if (l->by != NULL&& (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)continue;/* If we've already seen this file, skip it. */for (ll = needed; ll != l; ll = ll->next)if ((ll->by == NULL|| (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0)&& strcmp (ll->name, l->name) == 0)break;if (ll != l)continue;/* See if this file was included in the link explicitly. */global_needed = l;global_found = NULL;lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);if (global_found != NULL&& (bfd_elf_get_dyn_lib_class (global_found->the_bfd)& DYN_AS_NEEDED) == 0)continue;n.by = l->by;n.name = l->name;nn.by = l->by;if (trace_file_tries)info_msg (_("%s needed by %B\n"), l->name, l->by);/* As-needed libs specified on the command line (or linker script)take priority over libs found in search dirs. */if (global_found != NULL){nn.name = global_found->filename;if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))continue;}/* We need to find this file and include the symbol table. Wewant to search for the file in the same way that the dynamiclinker will search. That means that we want to userpath_link, rpath, then the environment variableLD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATHentries (native only), then the linker script LIB_SEARCH_DIRS.We do not search using the -L arguments.We search twice. The first time, we skip objects which mayintroduce version mismatches. The second time, we forcetheir use. See gld${EMULATION_NAME}_vercheck comment. */for (force = 0; force < 2; force++){size_t len;search_dirs_type *search;EOFif [ "x${NATIVE}" = xyes ] ; thenfragment <<EOFconst char *lib_path;EOFfiif [ "x${USE_LIBPATH}" = xyes ] ; thenfragment <<EOFstruct bfd_link_needed_list *rp;int found;EOFfifragment <<EOFif (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,&n, force))break;EOFif [ "x${USE_LIBPATH}" = xyes ] ; thenfragment <<EOFif (gld${EMULATION_NAME}_search_needed (command_line.rpath,&n, force))break;EOFfiif [ "x${NATIVE}" = xyes ] ; thenfragment <<EOFif (command_line.rpath_link == NULL&& command_line.rpath == NULL){lib_path = (const char *) getenv ("LD_RUN_PATH");if (gld${EMULATION_NAME}_search_needed (lib_path, &n,force))break;}lib_path = (const char *) getenv ("LD_LIBRARY_PATH");if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force))break;EOFfiif [ "x${USE_LIBPATH}" = xyes ] ; thenfragment <<EOFfound = 0;rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info);for (; !found && rp != NULL; rp = rp->next){char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name);found = (rp->by == l->by&& gld${EMULATION_NAME}_search_needed (tmpname,&n,force));free (tmpname);}if (found)break;EOFfiif [ "x${USE_LIBPATH}" = xyes ] ; thencase ${target} in*-*-freebsd* | *-*-dragonfly*)fragment <<EOFif (gld${EMULATION_NAME}_check_ld_elf_hints (l->name, force))break;EOF# FreeBSD;;*-*-linux-* | *-*-k*bsd*-*)# Linuxfragment <<EOFif (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))break;EOF;;esacfifragment <<EOFlen = strlen (l->name);for (search = search_head; search != NULL; search = search->next){char *filename;if (search->cmdline)continue;filename = (char *) xmalloc (strlen (search->name) + len + 2);sprintf (filename, "%s/%s", search->name, l->name);nn.name = filename;if (gld${EMULATION_NAME}_try_needed (&nn, force))break;free (filename);}if (search != NULL)break;EOFfragment <<EOF}if (force < 2)continue;einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",l->name, l->by);}}EOFfifragment <<EOF/* Look through an expression for an assignment statement. */static voidgld${EMULATION_NAME}_find_exp_assignment (etree_type *exp){bfd_boolean provide = FALSE;switch (exp->type.node_class){case etree_provide:case etree_provided:provide = TRUE;/* Fall thru */case etree_assign:/* We call record_link_assignment even if the symbol is defined.This is because if it is defined by a dynamic object, weactually want to use the value defined by the linker script,not the value from the dynamic object (because we are settingsymbols like etext). If the symbol is defined by a regularobject, then, as it happens, calling record_link_assignmentwill do no harm. */if (strcmp (exp->assign.dst, ".") != 0){if (!bfd_elf_record_link_assignment (link_info.output_bfd,&link_info,exp->assign.dst, provide,exp->assign.hidden))einfo ("%P%F: failed to record assignment to %s: %E\n",exp->assign.dst);}gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);break;case etree_binary:gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);break;case etree_trinary:gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);break;case etree_unary:gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);break;default:break;}}/* This is called by the before_allocation routine vialang_for_each_statement. It locates any assignment statements, andtells the ELF backend about them, in case they are assignments tosymbols which are referred to by dynamic objects. */static voidgld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s){if (s->header.type == lang_assignment_statement_enum)gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);}EOFif test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; thenif test x"${ELF_INTERPRETER_NAME+set}" = xset; thenELF_INTERPRETER_SET_DEFAULT="if (sinterp != NULL){sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME};sinterp->size = strlen ((char *) sinterp->contents) + 1;}"elseELF_INTERPRETER_SET_DEFAULT=fifragment <<EOF/* used by before_allocation and handle_option. */static voidgld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg){if (*to == NULL)*to = xstrdup (op_arg);else{size_t to_len = strlen (*to);size_t op_arg_len = strlen (op_arg);char *buf;char *cp = *to;/* First see whether OPTARG is already in the path. */do{if (strncmp (op_arg, cp, op_arg_len) == 0&& (cp[op_arg_len] == 0|| cp[op_arg_len] == config.rpath_separator))/* We found it. */break;/* Not yet found. */cp = strchr (cp, config.rpath_separator);if (cp != NULL)++cp;}while (cp != NULL);if (cp == NULL){buf = xmalloc (to_len + op_arg_len + 2);sprintf (buf, "%s%c%s", *to,config.rpath_separator, op_arg);free (*to);*to = buf;}}}/* This is called after the sections have been attached to outputsections, but before any sizes or addresses have been set. */static voidgld${EMULATION_NAME}_before_allocation (void){const char *rpath;asection *sinterp;bfd *abfd;if (link_info.hash->type == bfd_link_elf_hash_table)_bfd_elf_tls_setup (link_info.output_bfd, &link_info);/* If we are going to make any variable assignments, we need to letthe ELF backend know about them in case the variables arereferred to by dynamic objects. */lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);/* Let the ELF backend work out the sizes of any sections requiredby dynamic linking. */rpath = command_line.rpath;if (rpath == NULL)rpath = (const char *) getenv ("LD_RUN_PATH");for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)if (bfd_get_flavour (abfd) == bfd_target_elf_flavour){const char *audit_libs = elf_dt_audit (abfd);/* If the input bfd contains an audit entry, we need to add it asa dep audit entry. */if (audit_libs && *audit_libs != '\0'){char *cp = xstrdup (audit_libs);do{int more = 0;char *cp2 = strchr (cp, config.rpath_separator);if (cp2){*cp2 = '\0';more = 1;}if (cp != NULL && *cp != '\0')gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp);cp = more ? ++cp2 : NULL;}while (cp != NULL);}}if (! (bfd_elf_size_dynamic_sections(link_info.output_bfd, command_line.soname, rpath,command_line.filter_shlib, audit, depaudit,(const char * const *) command_line.auxiliary_filters,&link_info, &sinterp, lang_elf_version_info)))einfo ("%P%F: failed to set dynamic section sizes: %E\n");${ELF_INTERPRETER_SET_DEFAULT}/* Let the user override the dynamic linker we are using. */if (command_line.interpreter != NULL&& sinterp != NULL){sinterp->contents = (bfd_byte *) command_line.interpreter;sinterp->size = strlen (command_line.interpreter) + 1;}/* Look for any sections named .gnu.warning. As a GNU extensions,we treat such sections as containing warning messages. We printout the warning message, and then zero out the section size sothat it does not get copied into the output file. */{LANG_FOR_EACH_INPUT_STATEMENT (is){asection *s;bfd_size_type sz;char *msg;bfd_boolean ret;if (is->just_syms_flag)continue;s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");if (s == NULL)continue;sz = s->size;msg = (char *) xmalloc ((size_t) (sz + 1));if (! bfd_get_section_contents (is->the_bfd, s, msg,(file_ptr) 0, sz))einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",is->the_bfd);msg[sz] = '\0';ret = link_info.callbacks->warning (&link_info, msg,(const char *) NULL,is->the_bfd, (asection *) NULL,(bfd_vma) 0);ASSERT (ret);free (msg);/* Clobber the section size, so that we don't waste spacecopying the warning into the output file. If we've alreadysized the output section, adjust its size. The adjustmentis on rawsize because targets that size sections early willhave called lang_reset_memory_regions after sizing. */if (s->output_section != NULL&& s->output_section->rawsize >= s->size)s->output_section->rawsize -= s->size;s->size = 0;/* Also set SEC_EXCLUDE, so that local symbols defined in thewarning section don't get copied to the output. */s->flags |= SEC_EXCLUDE | SEC_KEEP;}}before_allocation_default ();if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info))einfo ("%P%F: failed to set dynamic section sizes: %E\n");}EOFfiif test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; thenfragment <<EOF/* Try to open a dynamic archive. This is where we know that ELFdynamic libraries have an extension of .so (or .sl on oddball systemslike hpux). */static bfd_booleangld${EMULATION_NAME}_open_dynamic_archive(const char *arch, search_dirs_type *search, lang_input_statement_type *entry){const char *filename;char *string;if (! entry->maybe_archive)return FALSE;filename = entry->filename;/* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSIONis defined, but it does not seem worth the headache to optimizeaway those two bytes of space. */string = (char *) xmalloc (strlen (search->name)+ strlen (filename)+ strlen (arch)#ifdef EXTRA_SHLIB_EXTENSION+ strlen (EXTRA_SHLIB_EXTENSION)#endif+ sizeof "/lib.so");sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);#ifdef EXTRA_SHLIB_EXTENSION/* Try the .so extension first. If that fails build a new filenameusing EXTRA_SHLIB_EXTENSION. */if (! ldfile_try_open_bfd (string, entry)){sprintf (string, "%s/lib%s%s%s", search->name,filename, arch, EXTRA_SHLIB_EXTENSION);#endifif (! ldfile_try_open_bfd (string, entry)){free (string);return FALSE;}#ifdef EXTRA_SHLIB_EXTENSION}#endifentry->filename = string;/* We have found a dynamic object to include in the link. The ELFbackend linker will create a DT_NEEDED entry in the .dynamicsection naming this file. If this file includes a DT_SONAMEentry, it will be used. Otherwise, the ELF linker will just usethe name of the file. For an archive found by searching, likethis one, the DT_NEEDED entry should consist of just the name ofthe file, without the path information used to find it. Notethat we only need to do this if we have a dynamic object; anarchive will never be referenced by a DT_NEEDED entry.FIXME: This approach--using bfd_elf_set_dt_needed_name--is notvery pretty. I haven't been able to think of anything that ispretty, though. */if (bfd_check_format (entry->the_bfd, bfd_object)&& (entry->the_bfd->flags & DYNAMIC) != 0){ASSERT (entry->maybe_archive && entry->search_dirs_flag);/* Rather than duplicating the logic above. Just use thefilename we recorded earlier. */filename = lbasename (entry->filename);bfd_elf_set_dt_needed_name (entry->the_bfd, filename);}return TRUE;}EOFfiif test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; thenfragment <<EOF/* A variant of lang_output_section_find used by place_orphan. */static lang_output_section_statement_type *output_rel_find (asection *sec, int isdyn){lang_output_section_statement_type *lookup;lang_output_section_statement_type *last = NULL;lang_output_section_statement_type *last_alloc = NULL;lang_output_section_statement_type *last_ro_alloc = NULL;lang_output_section_statement_type *last_rel = NULL;lang_output_section_statement_type *last_rel_alloc = NULL;int rela = sec->name[4] == 'a';for (lookup = &lang_output_section_statement.head->output_section_statement;lookup != NULL;lookup = lookup->next){if (lookup->constraint >= 0&& CONST_STRNEQ (lookup->name, ".rel")){int lookrela = lookup->name[4] == 'a';/* .rel.dyn must come before all other reloc sections, to suitGNU ld.so. */if (isdyn)break;/* Don't place after .rel.plt as doing so results in wrongdynamic tags. */if (strcmp (".plt", lookup->name + 4 + lookrela) == 0)break;if (rela == lookrela || last_rel == NULL)last_rel = lookup;if ((rela == lookrela || last_rel_alloc == NULL)&& lookup->bfd_section != NULL&& (lookup->bfd_section->flags & SEC_ALLOC) != 0)last_rel_alloc = lookup;}last = lookup;if (lookup->bfd_section != NULL&& (lookup->bfd_section->flags & SEC_ALLOC) != 0){last_alloc = lookup;if ((lookup->bfd_section->flags & SEC_READONLY) != 0)last_ro_alloc = lookup;}}if (last_rel_alloc)return last_rel_alloc;if (last_rel)return last_rel;if (last_ro_alloc)return last_ro_alloc;if (last_alloc)return last_alloc;return last;}/* Place an orphan section. We use this to put random SHF_ALLOCsections in the right segment. */static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan (asection *s,const char *secname,int constraint){static struct orphan_save hold[] ={{ ".text",SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE,0, 0, 0, 0 },{ ".rodata",SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,0, 0, 0, 0 },{ ".data",SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA,0, 0, 0, 0 },{ ".bss",SEC_ALLOC,0, 0, 0, 0 },{ 0,SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,0, 0, 0, 0 },{ ".interp",SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA,0, 0, 0, 0 },{ ".sdata",SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA,0, 0, 0, 0 },{ ".comment",SEC_HAS_CONTENTS,0, 0, 0, 0 },};enum orphan_save_index{orphan_text = 0,orphan_rodata,orphan_data,orphan_bss,orphan_rel,orphan_interp,orphan_sdata,orphan_nonalloc};static int orphan_init_done = 0;struct orphan_save *place;lang_output_section_statement_type *after;lang_output_section_statement_type *os;lang_output_section_statement_type *match_by_name = NULL;int isdyn = 0;int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;if (! link_info.relocatable&& link_info.combreloc&& (s->flags & SEC_ALLOC)){if (iself)switch (sh_type){case SHT_RELA:secname = ".rela.dyn";isdyn = 1;break;case SHT_REL:secname = ".rel.dyn";isdyn = 1;break;default:break;}else if (CONST_STRNEQ (secname, ".rel")){secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";isdyn = 1;}}/* Look through the script to see where to place this section. */if (constraint == 0)for (os = lang_output_section_find (secname);os != NULL;os = next_matching_output_section_statement (os, 0)){/* If we don't match an existing output section, telllang_insert_orphan to create a new output section. */constraint = SPECIAL;if (os->bfd_section != NULL&& (os->bfd_section->flags == 0|| (_bfd_elf_match_sections_by_type (link_info.output_bfd,os->bfd_section,s->owner, s)&& ((s->flags ^ os->bfd_section->flags)& (SEC_LOAD | SEC_ALLOC)) == 0))){/* We already have an output section statement with thisname, and its bfd section has compatible flags.If the section already exists but does not have any flagsset, then it has been created by the linker, probably as aresult of a --section-start command line switch. */lang_add_section (&os->children, s, os);return os;}/* Save unused output sections in case we can match themagainst orphans later. */if (os->bfd_section == NULL)match_by_name = os;}/* If we didn't match an active output section, see if we matched anunused one and use that. */if (match_by_name){lang_add_section (&match_by_name->children, s, match_by_name);return match_by_name;}if (!orphan_init_done){struct orphan_save *ho;for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho)if (ho->name != NULL){ho->os = lang_output_section_find (ho->name);if (ho->os != NULL && ho->os->flags == 0)ho->os->flags = ho->flags;}orphan_init_done = 1;}/* If this is a final link, then always put .gnu.warning.SYMBOLsections into the .text section to get them out of the way. */if (link_info.executable&& ! link_info.relocatable&& CONST_STRNEQ (s->name, ".gnu.warning.")&& hold[orphan_text].os != NULL){os = hold[orphan_text].os;lang_add_section (&os->children, s, os);return os;}/* Decide which segment the section should go in based on thesection name and section flags. We put loadable .note sectionsright after the .interp section, so that the PT_NOTE segment isstored right after the program headers where the OS can read itin the first page. */place = NULL;if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)place = &hold[orphan_nonalloc];else if ((s->flags & SEC_ALLOC) == 0);else if ((s->flags & SEC_LOAD) != 0&& ((iself && sh_type == SHT_NOTE)|| (!iself && CONST_STRNEQ (secname, ".note"))))place = &hold[orphan_interp];else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)place = &hold[orphan_bss];else if ((s->flags & SEC_SMALL_DATA) != 0)place = &hold[orphan_sdata];else if ((s->flags & SEC_READONLY) == 0)place = &hold[orphan_data];else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))|| (!iself && CONST_STRNEQ (secname, ".rel")))&& (s->flags & SEC_LOAD) != 0)place = &hold[orphan_rel];else if ((s->flags & SEC_CODE) == 0)place = &hold[orphan_rodata];elseplace = &hold[orphan_text];after = NULL;if (place != NULL){if (place->os == NULL){if (place->name != NULL)place->os = lang_output_section_find (place->name);elseplace->os = output_rel_find (s, isdyn);}after = place->os;if (after == NULL)after = lang_output_section_find_by_flags(s, &place->os, _bfd_elf_match_sections_by_type);if (after == NULL)/* *ABS* is always the first output section statement. */after = &lang_output_section_statement.head->output_section_statement;}return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL);}EOFfiif test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; thenfragment <<EOFstatic voidgld${EMULATION_NAME}_after_allocation (void){bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd,&link_info);gld${EMULATION_NAME}_map_segments (need_layout);}EOFfiif test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; thenfragment <<EOFstatic char *gld${EMULATION_NAME}_get_script (int *isfile)EOFif test -n "$COMPILE_IN"then# Scripts compiled in.# sed commands to quote an ld script as a C string.sc="-f stringify.sed"fragment <<EOF{*isfile = 0;if (link_info.relocatable && config.build_constructors)returnEOFsed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.cecho ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.cecho ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.cif cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; elseecho ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.cfiif test -n "$GENERATE_PIE_SCRIPT" ; thenif test -n "$GENERATE_COMBRELOC_SCRIPT" ; thenecho ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.cecho ' && link_info.relro' >> e${EMULATION_NAME}.cecho ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.cecho ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.cfiecho ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.cfiif test -n "$GENERATE_SHLIB_SCRIPT" ; thenif test -n "$GENERATE_COMBRELOC_SCRIPT" ; thenecho ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.cecho ' && link_info.relro' >> e${EMULATION_NAME}.cecho ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.cecho ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.cfiecho ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.cfiif test -n "$GENERATE_COMBRELOC_SCRIPT" ; thenecho ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.cecho ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.cecho ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.cfiecho ' ; else return' >> e${EMULATION_NAME}.csed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.cecho '; }' >> e${EMULATION_NAME}.celse# Scripts read from the filesystem.fragment <<EOF{*isfile = 1;if (link_info.relocatable && config.build_constructors)return "ldscripts/${EMULATION_NAME}.xu";else if (link_info.relocatable)return "ldscripts/${EMULATION_NAME}.xr";else if (!config.text_read_only)return "ldscripts/${EMULATION_NAME}.xbn";EOFif cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then :elsefragment <<EOFelse if (!config.magic_demand_paged)return "ldscripts/${EMULATION_NAME}.xn";EOFfiif test -n "$GENERATE_PIE_SCRIPT" ; thenif test -n "$GENERATE_COMBRELOC_SCRIPT" ; thenfragment <<EOFelse if (link_info.pie && link_info.combreloc&& link_info.relro && (link_info.flags & DF_BIND_NOW))return "ldscripts/${EMULATION_NAME}.xdw";else if (link_info.pie && link_info.combreloc)return "ldscripts/${EMULATION_NAME}.xdc";EOFfifragment <<EOFelse if (link_info.pie)return "ldscripts/${EMULATION_NAME}.xd";EOFfiif test -n "$GENERATE_SHLIB_SCRIPT" ; thenif test -n "$GENERATE_COMBRELOC_SCRIPT" ; thenfragment <<EOFelse if (link_info.shared && link_info.combreloc&& link_info.relro && (link_info.flags & DF_BIND_NOW))return "ldscripts/${EMULATION_NAME}.xsw";else if (link_info.shared && link_info.combreloc)return "ldscripts/${EMULATION_NAME}.xsc";EOFfifragment <<EOFelse if (link_info.shared)return "ldscripts/${EMULATION_NAME}.xs";EOFfiif test -n "$GENERATE_COMBRELOC_SCRIPT" ; thenfragment <<EOFelse if (link_info.combreloc && link_info.relro&& (link_info.flags & DF_BIND_NOW))return "ldscripts/${EMULATION_NAME}.xw";else if (link_info.combreloc)return "ldscripts/${EMULATION_NAME}.xc";EOFfifragment <<EOFelsereturn "ldscripts/${EMULATION_NAME}.x";}EOFfifiif test -n "$PARSE_AND_LIST_PROLOGUE" ; thenfragment <<EOF$PARSE_AND_LIST_PROLOGUEEOFfifragment <<EOF#define OPTION_DISABLE_NEW_DTAGS (400)#define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)#define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)#define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1)#define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1)#define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1)#define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1)#define OPTION_AUDIT (OPTION_BUILD_ID + 1)static voidgld${EMULATION_NAME}_add_options(int ns, char **shortopts, int nl, struct option **longopts,int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED){EOFif test x"$GENERATE_SHLIB_SCRIPT" = xyes; thenfragment <<EOFstatic const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:";EOFelsefragment <<EOFstatic const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:";EOFfifragment <<EOFstatic const struct option xtra_long[] = {EOFif test x"$GENERATE_SHLIB_SCRIPT" = xyes; thenfragment <<EOF{"audit", required_argument, NULL, OPTION_AUDIT},{"Bgroup", no_argument, NULL, OPTION_GROUP},EOFfifragment <<EOF{"build-id", optional_argument, NULL, OPTION_BUILD_ID},EOFif test x"$GENERATE_SHLIB_SCRIPT" = xyes; thenfragment <<EOF{"depaudit", required_argument, NULL, 'P'},{"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},{"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},{"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},{"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS},{"hash-style", required_argument, NULL, OPTION_HASH_STYLE},EOFfiif test -n "$PARSE_AND_LIST_LONGOPTS" ; thenfragment <<EOF$PARSE_AND_LIST_LONGOPTSEOFfifragment <<EOF{NULL, no_argument, NULL, 0}};*shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));*longopts = (struct option *)xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));}#define DEFAULT_BUILD_ID_STYLE "sha1"static bfd_booleangld${EMULATION_NAME}_handle_option (int optc){switch (optc){default:return FALSE;case OPTION_BUILD_ID:if (link_info.emit_note_gnu_build_id != NULL){free (link_info.emit_note_gnu_build_id);link_info.emit_note_gnu_build_id = NULL;}if (optarg == NULL)optarg = DEFAULT_BUILD_ID_STYLE;if (strcmp (optarg, "none"))link_info.emit_note_gnu_build_id = xstrdup (optarg);break;EOFif test x"$GENERATE_SHLIB_SCRIPT" = xyes; thenfragment <<EOFcase OPTION_AUDIT:gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg);break;case 'P':gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg);break;case OPTION_DISABLE_NEW_DTAGS:link_info.new_dtags = FALSE;break;case OPTION_ENABLE_NEW_DTAGS:link_info.new_dtags = TRUE;break;case OPTION_EH_FRAME_HDR:link_info.eh_frame_hdr = TRUE;break;case OPTION_GROUP:link_info.flags_1 |= (bfd_vma) DF_1_GROUP;/* Groups must be self-contained. */link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;break;case OPTION_EXCLUDE_LIBS:add_excluded_libs (optarg);break;case OPTION_HASH_STYLE:link_info.emit_hash = FALSE;link_info.emit_gnu_hash = FALSE;if (strcmp (optarg, "sysv") == 0)link_info.emit_hash = TRUE;else if (strcmp (optarg, "gnu") == 0)link_info.emit_gnu_hash = TRUE;else if (strcmp (optarg, "both") == 0){link_info.emit_hash = TRUE;link_info.emit_gnu_hash = TRUE;}elseeinfo (_("%P%F: invalid hash style \`%s'\n"), optarg);break;EOFfifragment <<EOFcase 'z':if (strcmp (optarg, "defs") == 0)link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;else if (strcmp (optarg, "muldefs") == 0)link_info.allow_multiple_definition = TRUE;else if (CONST_STRNEQ (optarg, "max-page-size=")){char *end;config.maxpagesize = strtoul (optarg + 14, &end, 0);if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0)einfo (_("%P%F: invalid maxium page size \`%s'\n"),optarg + 14);}else if (CONST_STRNEQ (optarg, "common-page-size=")){char *end;config.commonpagesize = strtoul (optarg + 17, &end, 0);if (*end|| (config.commonpagesize & (config.commonpagesize - 1)) != 0)einfo (_("%P%F: invalid common page size \`%s'\n"),optarg + 17);}else if (strcmp (optarg, "execstack") == 0){link_info.execstack = TRUE;link_info.noexecstack = FALSE;}else if (strcmp (optarg, "noexecstack") == 0){link_info.noexecstack = TRUE;link_info.execstack = FALSE;}EOFif test x"$GENERATE_SHLIB_SCRIPT" = xyes; thenfragment <<EOFelse if (strcmp (optarg, "initfirst") == 0)link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;else if (strcmp (optarg, "interpose") == 0)link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;else if (strcmp (optarg, "loadfltr") == 0)link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;else if (strcmp (optarg, "nodefaultlib") == 0)link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;else if (strcmp (optarg, "nodelete") == 0)link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;else if (strcmp (optarg, "nodlopen") == 0)link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;else if (strcmp (optarg, "nodump") == 0)link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;else if (strcmp (optarg, "now") == 0){link_info.flags |= (bfd_vma) DF_BIND_NOW;link_info.flags_1 |= (bfd_vma) DF_1_NOW;}else if (strcmp (optarg, "lazy") == 0){link_info.flags &= ~(bfd_vma) DF_BIND_NOW;link_info.flags_1 &= ~(bfd_vma) DF_1_NOW;}else if (strcmp (optarg, "origin") == 0){link_info.flags |= (bfd_vma) DF_ORIGIN;link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;}else if (strcmp (optarg, "combreloc") == 0)link_info.combreloc = TRUE;else if (strcmp (optarg, "nocombreloc") == 0)link_info.combreloc = FALSE;else if (strcmp (optarg, "nocopyreloc") == 0)link_info.nocopyreloc = TRUE;else if (strcmp (optarg, "relro") == 0)link_info.relro = TRUE;else if (strcmp (optarg, "norelro") == 0)link_info.relro = FALSE;EOFfifragment <<EOFelseeinfo (_("%P: warning: -z %s ignored.\n"), optarg);break;EOFif test -n "$PARSE_AND_LIST_ARGS_CASES" ; thenfragment <<EOF$PARSE_AND_LIST_ARGS_CASESEOFfifragment <<EOF}return TRUE;}EOFif test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; thenfragment <<EOFstatic voidgld${EMULATION_NAME}_list_options (FILE * file){EOFif test x"$GENERATE_SHLIB_SCRIPT" = xyes; thenfragment <<EOFfprintf (file, _("\--audit=AUDITLIB Specify a library to use for auditing\n"));fprintf (file, _("\-Bgroup Selects group name lookup rules for DSO\n"));EOFfifragment <<EOFfprintf (file, _("\--build-id[=STYLE] Generate build ID note\n"));EOFif test x"$GENERATE_SHLIB_SCRIPT" = xyes; thenfragment <<EOFfprintf (file, _("\-P AUDITLIB, --depaudit=AUDITLIB\n" "\Specify a library to use for auditing dependencies\n"));fprintf (file, _("\--disable-new-dtags Disable new dynamic tags\n"));fprintf (file, _("\--enable-new-dtags Enable new dynamic tags\n"));fprintf (file, _("\--eh-frame-hdr Create .eh_frame_hdr section\n"));fprintf (file, _("\--exclude-libs=LIBS Make all symbols in LIBS hidden\n"));fprintf (file, _("\--hash-style=STYLE Set hash style to sysv, gnu or both\n"));fprintf (file, _("\-z combreloc Merge dynamic relocs into one section and sort\n"));EOFfifragment <<EOFfprintf (file, _("\-z common-page-size=SIZE Set common page size to SIZE\n"));fprintf (file, _("\-z defs Report unresolved symbols in object files.\n"));fprintf (file, _("\-z execstack Mark executable as requiring executable stack\n"));EOFif test x"$GENERATE_SHLIB_SCRIPT" = xyes; thenfragment <<EOFfprintf (file, _("\-z initfirst Mark DSO to be initialized first at runtime\n"));fprintf (file, _("\-z interpose Mark object to interpose all DSOs but executable\n"));fprintf (file, _("\-z lazy Mark object lazy runtime binding (default)\n"));fprintf (file, _("\-z loadfltr Mark object requiring immediate process\n"));EOFfifragment <<EOFfprintf (file, _("\-z max-page-size=SIZE Set maximum page size to SIZE\n"));fprintf (file, _("\-z muldefs Allow multiple definitions\n"));EOFif test x"$GENERATE_SHLIB_SCRIPT" = xyes; thenfragment <<EOFfprintf (file, _("\-z nocombreloc Don't merge dynamic relocs into one section\n"));fprintf (file, _("\-z nocopyreloc Don't create copy relocs\n"));fprintf (file, _("\-z nodefaultlib Mark object not to use default search paths\n"));fprintf (file, _("\-z nodelete Mark DSO non-deletable at runtime\n"));fprintf (file, _("\-z nodlopen Mark DSO not available to dlopen\n"));fprintf (file, _("\-z nodump Mark DSO not available to dldump\n"));EOFfifragment <<EOFfprintf (file, _("\-z noexecstack Mark executable as not requiring executable stack\n"));EOFif test x"$GENERATE_SHLIB_SCRIPT" = xyes; thenfragment <<EOFfprintf (file, _("\-z norelro Don't create RELRO program header\n"));fprintf (file, _("\-z now Mark object non-lazy runtime binding\n"));fprintf (file, _("\-z origin Mark object requiring immediate \$ORIGIN\n\processing at runtime\n"));fprintf (file, _("\-z relro Create RELRO program header\n"));EOFfiif test -n "$PARSE_AND_LIST_OPTIONS" ; thenfragment <<EOF$PARSE_AND_LIST_OPTIONSEOFfifragment <<EOF}EOFif test -n "$PARSE_AND_LIST_EPILOGUE" ; thenfragment <<EOF$PARSE_AND_LIST_EPILOGUEEOFfififragment <<EOFstruct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation ={${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},${LDEMUL_SYSLIB-syslib_default},${LDEMUL_HLL-hll_default},${LDEMUL_AFTER_PARSE-after_parse_default},${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation},${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},${LDEMUL_CHOOSE_TARGET-ldemul_default_target},${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},"${EMULATION_NAME}","${OUTPUT_FORMAT}",${LDEMUL_FINISH-finish_default},${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},${LDEMUL_SET_SYMBOLS-NULL},${LDEMUL_PARSE_ARGS-NULL},gld${EMULATION_NAME}_add_options,gld${EMULATION_NAME}_handle_option,${LDEMUL_UNRECOGNIZED_FILE-NULL},${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols},${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},${LDEMUL_NEW_VERS_PATTERN-NULL}};EOF
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