diff options
author | Alan Modra <amodra@gmail.com> | 2000-07-28 01:33:14 +0000 |
---|---|---|
committer | Alan Modra <amodra@gmail.com> | 2000-07-28 01:33:14 +0000 |
commit | 41392f033d9a298106d515efbc7e7a572eb7eb3e (patch) | |
tree | 509993164200275e43381857255db0ffcb7e46ee /ld/emultempl | |
parent | 04925e1e0b21992039d1c3923fa47896fac013a6 (diff) | |
download | gdb-41392f033d9a298106d515efbc7e7a572eb7eb3e.zip gdb-41392f033d9a298106d515efbc7e7a572eb7eb3e.tar.gz gdb-41392f033d9a298106d515efbc7e7a572eb7eb3e.tar.bz2 |
Add some shell variables and shell code to elf32.em
to allow elf32.em to be used by ports that require
some minor variations or a few extra functions.
Implement for hppaelf and armelf.
Fix header file include order in m68kcoff.em
Diffstat (limited to 'ld/emultempl')
-rw-r--r-- | ld/emultempl/armelf.em | 1282 | ||||
-rw-r--r-- | ld/emultempl/elf32.em | 157 | ||||
-rw-r--r-- | ld/emultempl/hppaelf.em | 443 | ||||
-rw-r--r-- | ld/emultempl/m68kcoff.em | 2 |
4 files changed, 223 insertions, 1661 deletions
diff --git a/ld/emultempl/armelf.em b/ld/emultempl/armelf.em index 37339cc..3c82bce 100644 --- a/ld/emultempl/armelf.em +++ b/ld/emultempl/armelf.em @@ -1,137 +1,32 @@ # This shell script emits a C file. -*- C -*- -# It does some substitutions. -ELFSIZE=32 -cat >e${EMULATION_NAME}.c <<EOF -/* This file is is generated by a shell script. DO NOT EDIT! */ - -/* emulate the original gld for the given ${EMULATION_NAME} - Copyright (C) 1991, 93, 96, 97, 98, 99, 2000 - Free Software Foundation, Inc. - Written by Steve Chamberlain steve@cygnus.com - -This file is part of GLD, the Gnu Linker. - -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#define TARGET_IS_${EMULATION_NAME} - -#include "bfd.h" -#include "sysdep.h" - -#include <ctype.h> - -#include "bfdlink.h" -#include "getopt.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" - -static boolean gld${EMULATION_NAME}_open_dynamic_archive - PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *)); -static void gld${EMULATION_NAME}_after_open PARAMS ((void)); -static void gld${EMULATION_NAME}_check_needed - PARAMS ((lang_input_statement_type *)); -static void gld${EMULATION_NAME}_stat_needed - PARAMS ((lang_input_statement_type *)); -static boolean gld${EMULATION_NAME}_search_needed - PARAMS ((const char *, const char *, int)); -static boolean gld${EMULATION_NAME}_try_needed PARAMS ((const char *, int)); -static void gld${EMULATION_NAME}_vercheck - PARAMS ((lang_input_statement_type *)); -static void gld${EMULATION_NAME}_find_statement_assignment - PARAMS ((lang_statement_union_type *)); -static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *)); -static boolean gld${EMULATION_NAME}_place_orphan - PARAMS ((lang_input_statement_type *, asection *)); -static lang_output_section_statement_type *output_rel_find PARAMS ((void)); -static void gld${EMULATION_NAME}_before_parse PARAMS ((void)); -static void gld${EMULATION_NAME}_before_allocation PARAMS ((void)); -static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile)); -static int gld${EMULATION_NAME}_parse_args PARAMS((int, char **)); -static void gld${EMULATION_NAME}_list_options PARAMS ((FILE *)); -static void gld${EMULATION_NAME}_finish PARAMS ((void)); +# Copyright (C) 1991, 93, 96, 97, 98, 99, 2000 +# Free Software Foundation, Inc. +# +# This file is part of GLD, the Gnu Linker. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 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 of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +# + +# This file is sourced from elf32.em, and defines extra arm-elf +# specific routines. +# +cat >>e${EMULATION_NAME}.c <<EOF - static int no_pipeline_knowledge = 0; -static char * thumb_entry_symbol = NULL; - -#define OPTION_THUMB_ENTRY 301 +static char *thumb_entry_symbol = NULL; -static struct option longopts[] = -{ - { "no-pipeline-knowledge", no_argument, NULL, 'p'}, - { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, - { NULL, no_argument, NULL, 0 } -}; - -static void -gld${EMULATION_NAME}_list_options (file) - FILE * file; -{ - fprintf (file, _(" -p --no-pipeline-knowledge Stop the linker knowing about the pipeline length\n")); - fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); -} - -static int -gld${EMULATION_NAME}_parse_args (argc, argv) - int argc; - char ** argv; -{ - int longind; - int optc; - int prevoptind = optind; - int prevopterr = opterr; - int wanterror; - static int lastoptind = -1; - - if (lastoptind != optind) - opterr = 0; - - wanterror = opterr; - lastoptind = optind; - - optc = getopt_long_only (argc, argv, "-p", longopts, & longind); - opterr = prevopterr; - - switch (optc) - { - default: - if (wanterror) - xexit (1); - optind = prevoptind; - return 0; - - case 'p': - no_pipeline_knowledge = 1; - break; - - case OPTION_THUMB_ENTRY: - thumb_entry_symbol = optarg; - break; - } - - return 1; -} - static void gld${EMULATION_NAME}_before_parse () @@ -143,174 +38,12 @@ gld${EMULATION_NAME}_before_parse () config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo true ; else echo false ; fi`; } -/* Try to open a dynamic archive. This is where we know that ELF - dynamic libraries have an extension of .so. */ - -static boolean -gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry) - const char *arch; - search_dirs_type *search; - lang_input_statement_type *entry; -{ - const char *filename; - char *string; - - if (! entry->is_archive) - return false; - - filename = entry->filename; - - string = (char *) xmalloc (strlen (search->name) - + strlen (filename) - + strlen (arch) - + sizeof "/lib.so"); - - sprintf (string, "%s/lib%s%s.so", search->name, filename, arch); - - if (! ldfile_try_open_bfd (string, entry)) - { - free (string); - return false; - } - - entry->filename = string; - - /* We have found a dynamic object to include in the link. The ELF - backend linker will create a DT_NEEDED entry in the .dynamic - section naming this file. If this file includes a DT_SONAME - entry, it will be used. Otherwise, the ELF linker will just use - the name of the file. For an archive found by searching, like - this one, the DT_NEEDED entry should consist of just the name of - the file, without the path information used to find it. Note - that we only need to do this if we have a dynamic object; an - archive will never be referenced by a DT_NEEDED entry. - - FIXME: This approach--using bfd_elf_set_dt_needed_name--is not - very pretty. I haven't been able to think of anything that is - pretty, though. */ - if (bfd_check_format (entry->the_bfd, bfd_object) - && (entry->the_bfd->flags & DYNAMIC) != 0) - { - char *needed_name; - - ASSERT (entry->is_archive && entry->search_dirs_flag); - needed_name = (char *) xmalloc (strlen (filename) - + strlen (arch) - + sizeof "lib.so"); - sprintf (needed_name, "lib%s%s.so", filename, arch); - bfd_elf_set_dt_needed_name (entry->the_bfd, needed_name); - } - - return true; -} - -EOF -if [ "x${host}" = "x${target}" ] ; then - case " ${EMULATION_LIBPATH} " in - *" ${EMULATION_NAME} "*) -cat >>e${EMULATION_NAME}.c <<EOF - -/* For a native linker, check the file /etc/ld.so.conf for directories - in which we may find shared libraries. /etc/ld.so.conf is really - only meaningful on Linux, but we check it on other systems anyhow. */ - -static boolean gld${EMULATION_NAME}_check_ld_so_conf - PARAMS ((const char *, int)); - -static boolean -gld${EMULATION_NAME}_check_ld_so_conf (name, force) - const char *name; - int force; -{ - static boolean initialized; - static char *ld_so_conf; - - if (! initialized) - { - FILE *f; - - f = fopen ("/etc/ld.so.conf", FOPEN_RT); - if (f != NULL) - { - char *b; - size_t len, alloc; - int c; - - len = 0; - alloc = 100; - b = (char *) xmalloc (alloc); - - while ((c = getc (f)) != EOF) - { - if (len + 1 >= alloc) - { - alloc *= 2; - b = (char *) xrealloc (b, alloc); - } - if (c != ':' - && c != ' ' - && c != '\t' - && c != '\n' - && c != ',') - { - b[len] = c; - ++len; - } - else - { - if (len > 0 && b[len - 1] != ':') - { - b[len] = ':'; - ++len; - } - } - } - - if (len > 0 && b[len - 1] == ':') - --len; - - if (len > 0) - b[len] = '\0'; - else - { - free (b); - b = NULL; - } - - fclose (f); - - ld_so_conf = b; - } - - initialized = true; - } - - if (ld_so_conf == NULL) - return false; - - return gld${EMULATION_NAME}_search_needed (ld_so_conf, name, force); -} - -EOF - ;; - esac -fi -cat >>e${EMULATION_NAME}.c <<EOF - -/* These variables are required to pass information back and forth - between after_open and check_needed and stat_needed and vercheck. */ -static struct bfd_link_needed_list *global_needed; -static struct stat global_stat; -static boolean global_found; -static struct bfd_link_needed_list *global_vercheck_needed; -static boolean global_vercheck_failed; +static void arm_elf_after_open PARAMS((void)); static void -gld${EMULATION_NAME}_after_open () +arm_elf_after_open () { - struct bfd_link_needed_list *needed, *l; - if (strstr (bfd_get_target (output_bfd), "arm") == NULL) { /* The arm backend needs special fields in the output hash structure. @@ -330,851 +63,20 @@ gld${EMULATION_NAME}_after_open () } } - /* We only need to worry about this when doing a final link. */ - if (link_info.relocateable || link_info.shared) - return; - - /* Get the list of files which appear in DT_NEEDED entries in - dynamic objects included in the link (often there will be none). - For each such file, we want to track down the corresponding - library, and include the symbol table in the link. This is what - the runtime dynamic linker will do. Tracking the files down here - permits one dynamic object to include another without requiring - special action by the person doing the link. Note that the - needed list can actually grow while we are stepping through this - loop. */ - needed = bfd_elf_get_needed_list (output_bfd, &link_info); - for (l = needed; l != NULL; l = l->next) - { - struct bfd_link_needed_list *ll; - int force; - - /* If we've already seen this file, skip it. */ - for (ll = needed; ll != l; ll = ll->next) - if (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 = false; - lang_for_each_input_file (gld${EMULATION_NAME}_check_needed); - if (global_found) - continue; - - /* We need to find this file and include the symbol table. We - want to search for the file in the same way that the dynamic - linker will search. That means that we want to use - rpath_link, rpath, then the environment variable - LD_LIBRARY_PATH (native only), then the linker script - LIB_SEARCH_DIRS. We do not search using the -L arguments. - - We search twice. The first time, we skip objects which may - introduce version mismatches. The second time, we force - their use. See gld${EMULATION_NAME}_vercheck comment. */ - for (force = 0; force < 2; force++) - { - const char *lib_path; - size_t len; - search_dirs_type *search; - - if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link, - l->name, force)) - break; - if (gld${EMULATION_NAME}_search_needed (command_line.rpath, - l->name, force)) - break; - if (command_line.rpath_link == NULL - && command_line.rpath == NULL) - { - lib_path = (const char *) getenv ("LD_RUN_PATH"); - if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, - force)) - break; - } -EOF -if [ "x${host}" = "x${target}" ] ; then - case " ${EMULATION_LIBPATH} " in - *" ${EMULATION_NAME} "*) -cat >>e${EMULATION_NAME}.c <<EOF - lib_path = (const char *) getenv ("LD_LIBRARY_PATH"); - if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, force)) - break; -EOF - ;; - esac -fi -cat >>e${EMULATION_NAME}.c <<EOF - len = 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); - if (gld${EMULATION_NAME}_try_needed (filename, force)) - break; - free (filename); - } - if (search != NULL) - break; -EOF -if [ "x${host}" = "x${target}" ] ; then - case " ${EMULATION_LIBPATH} " in - *" ${EMULATION_NAME} "*) -cat >>e${EMULATION_NAME}.c <<EOF - if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force)) - break; -EOF - ;; - esac -fi -cat >>e${EMULATION_NAME}.c <<EOF - } - - if (force < 2) - continue; - - einfo ("%P: warning: %s, needed by %B, not found (try using --rpath)\n", - l->name, l->by); - } -} - -/* Search for a needed file in a path. */ - -static boolean -gld${EMULATION_NAME}_search_needed (path, name, force) - const char *path; - const char *name; - int force; -{ - const char *s; - size_t len; - - if (path == NULL || *path == '\0') - return false; - len = strlen (name); - while (1) - { - char *filename, *sset; - - s = strchr (path, ':'); - if (s == NULL) - s = path + strlen (path); - - filename = (char *) xmalloc (s - path + len + 2); - if (s == path) - sset = filename; - else - { - memcpy (filename, path, s - path); - filename[s - path] = '/'; - sset = filename + (s - path) + 1; - } - strcpy (sset, name); - - if (gld${EMULATION_NAME}_try_needed (filename, force)) - return true; - - free (filename); - - if (*s == '\0') - break; - path = s + 1; - } - - return false; + /* Call the standard elf routine. */ + gld${EMULATION_NAME}_after_open (); } -/* This function is called for each possible name for a dynamic object - named by a DT_NEEDED entry. The FORCE parameter indicates whether - to skip the check for a conflicting version. */ -static boolean -gld${EMULATION_NAME}_try_needed (name, force) - const char *name; - int force; -{ - bfd *abfd; - - abfd = bfd_openr (name, bfd_get_target (output_bfd)); - if (abfd == NULL) - return false; - if (! bfd_check_format (abfd, bfd_object)) - { - (void) bfd_close (abfd); - return false; - } - if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0) - { - (void) bfd_close (abfd); - return false; - } - - /* Check whether this object would include any conflicting library - versions. If FORCE is set, then we skip this check; we use this - the second time around, if we couldn't find any compatible - instance of the shared library. */ - - if (! force) - { - struct bfd_link_needed_list *needed; - - if (! bfd_elf_get_bfd_needed_list (abfd, &needed)) - einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd); - - if (needed != NULL) - { - global_vercheck_needed = needed; - global_vercheck_failed = false; - lang_for_each_input_file (gld${EMULATION_NAME}_vercheck); - if (global_vercheck_failed) - { - (void) bfd_close (abfd); - /* Return false to force the caller to move on to try - another file on the search path. */ - return false; - } - - /* But wait! It gets much worse. On Linux, if a shared - library does not use libc at all, we are supposed to skip - it the first time around in case we encounter a shared - library later on with the same name which does use the - version of libc that we want. This is much too horrible - to use on any system other than Linux. */ - -EOF -case ${target} in - *-*-linux-gnu*) - cat >>e${EMULATION_NAME}.c <<EOF - { - struct bfd_link_needed_list *l; - - for (l = needed; l != NULL; l = l->next) - if (strncmp (l->name, "libc.so", 7) == 0) - break; - if (l == NULL) - { - (void) bfd_close (abfd); - return false; - } - } - -EOF - ;; -esac -cat >>e${EMULATION_NAME}.c <<EOF - } - } - - /* We've found a dynamic object matching the DT_NEEDED entry. */ - - /* We have already checked that there is no other input file of the - same name. We must now check again that we are not including the - same file twice. We need to do this because on many systems - libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will - reference libc.so.1. If we have already included libc.so, we - don't want to include libc.so.1 if they are the same file, and we - can only check that using stat. */ - - if (bfd_stat (abfd, &global_stat) != 0) - einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd); - global_found = false; - lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed); - if (global_found) - { - /* Return true to indicate that we found the file, even though - we aren't going to do anything with it. */ - return true; - } - - /* Tell the ELF backend that don't want the output file to have a - DT_NEEDED entry for this file. */ - bfd_elf_set_dt_needed_name (abfd, ""); - - /* 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; -} - -/* See if an input file matches a DT_NEEDED entry by name. */ +static void arm_elf_before_allocation PARAMS ((void)); static void -gld${EMULATION_NAME}_check_needed (s) - lang_input_statement_type *s; +arm_elf_before_allocation () { - if (global_found) - return; - - if (s->filename != NULL - && strcmp (s->filename, global_needed->name) == 0) - { - global_found = true; - return; - } - - if (s->the_bfd != NULL) - { - const char *soname; - - soname = bfd_elf_get_dt_soname (s->the_bfd); - if (soname != NULL - && strcmp (soname, global_needed->name) == 0) - { - global_found = true; - return; - } - } - - if (s->search_dirs_flag - && s->filename != NULL - && strchr (global_needed->name, '/') == NULL) - { - const char *f; + /* Call the standard elf routine. */ + gld${EMULATION_NAME}_before_allocation (); - f = strrchr (s->filename, '/'); - if (f != NULL - && strcmp (f + 1, global_needed->name) == 0) - { - global_found = true; - return; - } - } -} - -/* See if an input file matches a DT_NEEDED entry by running stat on - the file. */ - -static void -gld${EMULATION_NAME}_stat_needed (s) - lang_input_statement_type *s; -{ - struct stat st; - const char *suffix; - const char *soname; - const char *f; - - if (global_found) - return; - if (s->the_bfd == NULL) - return; - - if (bfd_stat (s->the_bfd, &st) != 0) - { - einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd); - return; - } - - if (st.st_dev == global_stat.st_dev - && st.st_ino == global_stat.st_ino) - { - global_found = true; - return; - } - - /* We issue a warning if it looks like we are including two - different versions of the same shared library. For example, - there may be a problem if -lc picks up libc.so.6 but some other - shared library has a DT_NEEDED entry of libc.so.5. This is a - hueristic test, and it will only work if the name looks like - NAME.so.VERSION. FIXME: Depending on file names is error-prone. - If we really want to issue warnings about mixing version numbers - of 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 = s->filename; - - f = strrchr (soname, '/'); - if (f != NULL) - ++f; - else - f = soname; - - if (strncmp (f, 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, f); -} - -/* On Linux, it's possible to have different versions of the same - shared library linked against different versions of libc. The - dynamic linker somehow tags which libc version to use in - /etc/ld.so.cache, and, based on the libc that it sees in the - executable, chooses which version of the shared library to use. - - We try to do a similar check here by checking whether this shared - library needs any other shared libraries which may conflict with - libraries we have already included in the link. If it does, we - skip it, and try to find another shared library farther on down the - link path. - - This is called via lang_for_each_input_file. - GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object - which we ar checking. This sets GLOBAL_VERCHECK_FAILED if we find - a conflicting version. */ - -static void -gld${EMULATION_NAME}_vercheck (s) - lang_input_statement_type *s; -{ - const char *soname, *f; - 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 = bfd_get_filename (s->the_bfd); - - f = strrchr (soname, '/'); - if (f != NULL) - ++f; - else - f = soname; - - for (l = global_vercheck_needed; l != NULL; l = l->next) - { - const char *suffix; - - if (strcmp (f, 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 (strncmp (f, l->name, suffix - l->name) == 0) - { - /* Here we know that S is a dynamic object FOO.SO.VER1, and - the object we are considering needs a dynamic object - FOO.SO.VER2, and VER1 and VER2 are different. This - appears to be a version mismatch, so we tell the caller - to try a different version of this library. */ - global_vercheck_failed = true; - return; - } - } -} - -/* Place an orphan section. We use this to put random SHF_ALLOC - sections in the right segment. */ - -struct orphan_save -{ - lang_output_section_statement_type *os; - asection **section; - lang_statement_union_type **stmt; -}; - -/*ARGSUSED*/ -static boolean -gld${EMULATION_NAME}_place_orphan (file, s) - lang_input_statement_type *file; - asection *s; -{ - static struct orphan_save hold_text; - static struct orphan_save hold_rodata; - static struct orphan_save hold_data; - static struct orphan_save hold_bss; - static struct orphan_save hold_rel; - static struct orphan_save hold_interp; - struct orphan_save *place; - lang_statement_list_type *old; - lang_statement_list_type add; - etree_type *address; - const char *secname, *ps; - const char *outsecname; - lang_output_section_statement_type *os; - - secname = bfd_get_section_name (s->owner, s); - - /* Look through the script to see where to place this section. */ - os = lang_output_section_find (secname); - - if (os != NULL - && os->bfd_section != NULL - && ((s->flags ^ os->bfd_section->flags) & (SEC_LOAD | SEC_ALLOC)) == 0) - { - /* We have already placed a section with this name. */ - wild_doit (&os->children, s, os, file); - return true; - } - - if (hold_text.os == NULL) - hold_text.os = lang_output_section_find (".text"); - - /* If this is a final link, then always put .gnu.warning.SYMBOL - sections into the .text section to get them out of the way. */ - if (! link_info.shared - && ! link_info.relocateable - && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0 - && hold_text.os != NULL) - { - wild_doit (&hold_text.os->children, s, hold_text.os, file); - return true; - } - - /* Decide which segment the section should go in based on the - section name and section flags. We put loadable .note sections - right after the .interp section, so that the PT_NOTE segment is - stored right after the program headers where the OS can read it - in the first page. */ -#define HAVE_SECTION(hold, name) \ -(hold.os != NULL || (hold.os = lang_output_section_find (name)) != NULL) - - if (s->flags & SEC_EXCLUDE) - return false; - else if ((s->flags & SEC_ALLOC) == 0) - place = NULL; - else if ((s->flags & SEC_LOAD) != 0 - && strncmp (secname, ".note", 4) == 0 - && HAVE_SECTION (hold_interp, ".interp")) - place = &hold_interp; - else if ((s->flags & SEC_HAS_CONTENTS) == 0 - && HAVE_SECTION (hold_bss, ".bss")) - place = &hold_bss; - else if ((s->flags & SEC_READONLY) == 0 - && HAVE_SECTION (hold_data, ".data")) - place = &hold_data; - else if (strncmp (secname, ".rel", 4) == 0 - && (hold_rel.os != NULL - || (hold_rel.os = output_rel_find ()) != NULL)) - place = &hold_rel; - else if ((s->flags & SEC_CODE) == 0 - && (s->flags & SEC_READONLY) != 0 - && HAVE_SECTION (hold_rodata, ".rodata")) - place = &hold_rodata; - else if ((s->flags & SEC_READONLY) != 0 - && hold_text.os != NULL) - place = &hold_text; - else - place = NULL; - -#undef HAVE_SECTION - - /* Choose a unique name for the section. This will be needed if the - same section name appears in the input file with different - loadable or allocateable characteristics. */ - outsecname = secname; - if (bfd_get_section_by_name (output_bfd, outsecname) != NULL) - { - unsigned int len; - char *newname; - unsigned int i; - - len = strlen (outsecname); - newname = xmalloc (len + 5); - strcpy (newname, outsecname); - i = 0; - do - { - sprintf (newname + len, "%d", i); - ++i; - } - while (bfd_get_section_by_name (output_bfd, newname) != NULL); - - outsecname = newname; - } - - if (place != NULL) - { - /* Start building a list of statements for this section. */ - old = stat_ptr; - stat_ptr = &add; - lang_list_init (stat_ptr); - - /* If the name of the section is representable in C, then create - symbols to mark the start and the end of the section. */ - for (ps = outsecname; *ps != '\0'; ps++) - if (! isalnum ((unsigned char) *ps) && *ps != '_') - break; - if (*ps == '\0' && config.build_constructors) - { - char *symname; - etree_type *e_align; - - symname = (char *) xmalloc (ps - outsecname + sizeof "__start_"); - sprintf (symname, "__start_%s", outsecname); - e_align = exp_unop (ALIGN_K, - exp_intop ((bfd_vma) 1 << s->alignment_power)); - lang_add_assignment (exp_assop ('=', symname, e_align)); - } - } - - if (link_info.relocateable || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0) - address = exp_intop ((bfd_vma) 0); - else - address = NULL; - - os = lang_enter_output_section_statement (outsecname, address, 0, - (bfd_vma) 0, - (etree_type *) NULL, - (etree_type *) NULL, - (etree_type *) NULL); - - wild_doit (&os->children, s, os, file); - - lang_leave_output_section_statement - ((bfd_vma) 0, "*default*", - (struct lang_output_section_phdr_list *) NULL, "*default*"); - - if (place != NULL) - { - asection *snew, **pps; - - stat_ptr = &add; - - if (*ps == '\0' && config.build_constructors) - { - char *symname; - - symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_"); - sprintf (symname, "__stop_%s", outsecname); - lang_add_assignment (exp_assop ('=', symname, - exp_nameop (NAME, "."))); - } - stat_ptr = old; - - snew = os->bfd_section; - if (place->os->bfd_section != NULL || place->section != NULL) - { - /* Shuffle the section to make the output file look neater. */ - if (place->section == NULL) - { -#if 0 - /* Finding the end of the list is a little tricky. We - make a wild stab at it by comparing section flags. */ - flagword first_flags = place->os->bfd_section->flags; - for (pps = &place->os->bfd_section->next; - *pps != NULL && (*pps)->flags == first_flags; - pps = &(*pps)->next) - ; - place->section = pps; -#else - /* Put orphans after the first section on the list. */ - place->section = &place->os->bfd_section->next; -#endif - } - - /* Unlink the section. */ - for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next) - ; - *pps = snew->next; - - /* Now tack it on to the "place->os" section list. */ - snew->next = *place->section; - *place->section = snew; - } - place->section = &snew->next; /* Save the end of this list. */ - - if (place->stmt == NULL) - { - /* Put the new statement list right at the head. */ - *add.tail = place->os->header.next; - place->os->header.next = add.head; - } - else - { - /* Put it after the last orphan statement we added. */ - *add.tail = *place->stmt; - *place->stmt = add.head; - } - place->stmt = add.tail; /* Save the end of this list. */ - } - - return true; -} - -/* A variant of lang_output_section_find. */ -static lang_output_section_statement_type * -output_rel_find () -{ - lang_statement_union_type *u; - lang_output_section_statement_type *lookup; - - for (u = lang_output_section_statement.head; - u != (lang_statement_union_type *) NULL; - u = lookup->next) - { - lookup = &u->output_section_statement; - if (strncmp (".rel", lookup->name, 4) == 0 - && lookup->bfd_section != NULL - && (lookup->bfd_section->flags & SEC_ALLOC) != 0) - { - return lookup; - } - } - return (lang_output_section_statement_type *) NULL; -} - -/* Look through an expression for an assignment statement. */ - -static void -gld${EMULATION_NAME}_find_exp_assignment (exp) - etree_type *exp; -{ - struct bfd_link_hash_entry *h; - - switch (exp->type.node_class) - { - case etree_provide: - h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst, - false, false, false); - if (h == NULL) - break; - - /* We call record_link_assignment even if the symbol is defined. - This is because if it is defined by a dynamic object, we - actually want to use the value defined by the linker script, - not the value from the dynamic object (because we are setting - symbols like etext). If the symbol is defined by a regular - object, then, as it happens, calling record_link_assignment - will do no harm. */ - - /* Fall through. */ - case etree_assign: - if (strcmp (exp->assign.dst, ".") != 0) - { - if (! (bfd_elf${ELFSIZE}_record_link_assignment - (output_bfd, &link_info, exp->assign.dst, - exp->type.node_class == etree_provide ? true : false))) - einfo ("%P%F: failed to record assignment to %s: %E\n", - exp->assign.dst); - } - gld${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 via - lang_for_each_statement. It locates any assignment statements, and - tells the ELF backend about them, in case they are assignments to - symbols which are referred to by dynamic objects. */ - -static void -gld${EMULATION_NAME}_find_statement_assignment (s) - lang_statement_union_type *s; -{ - if (s->header.type == lang_assignment_statement_enum) - gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp); -} - -/* This is called after the sections have been attached to output - sections, but before any sizes or addresses have been set. */ - -static void -gld${EMULATION_NAME}_before_allocation () -{ - const char *rpath; - asection *sinterp; - - /* If we are going to make any variable assignments, we need to let - the ELF backend know about them in case the variables are - referred to by dynamic objects. */ - lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment); - - /* Let the ELF backend work out the sizes of any sections required - by dynamic linking. */ - rpath = command_line.rpath; - if (rpath == NULL) - rpath = (const char *) getenv ("LD_RUN_PATH"); - if (! (bfd_elf${ELFSIZE}_size_dynamic_sections - (output_bfd, command_line.soname, rpath, - command_line.export_dynamic, command_line.filter_shlib, - (const char * const *) command_line.auxiliary_filters, - &link_info, &sinterp, lang_elf_version_info))) - einfo ("%P%F: failed to set dynamic section sizes: %E\n"); - - /* Let the user override the dynamic linker we are using. */ - if (command_line.interpreter != NULL - && sinterp != NULL) - { - sinterp->contents = (bfd_byte *) command_line.interpreter; - sinterp->_raw_size = strlen (command_line.interpreter) + 1; - } - - /* Look for any sections named .gnu.warning. As a GNU extensions, - we treat such sections as containing warning messages. We print - out the warning message, and then zero out the section size so - that it does not get copied into the output file. */ - - { - LANG_FOR_EACH_INPUT_STATEMENT (is) - { - asection *s; - bfd_size_type sz; - char *msg; - boolean ret; - - if (is->just_syms_flag) - continue; - - s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning"); - if (s == NULL) - continue; - - sz = bfd_section_size (is->the_bfd, s); - msg = xmalloc ((size_t) sz + 1); - if (! bfd_get_section_contents (is->the_bfd, s, msg, (file_ptr) 0, sz)) - einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n", - is->the_bfd); - msg[sz] = '\0'; - ret = link_info.callbacks->warning (&link_info, msg, - (const char *) NULL, - is->the_bfd, (asection *) NULL, - (bfd_vma) 0); - ASSERT (ret); - free (msg); - - /* Clobber the section size, so that we don't waste copying the - warning into the output file. */ - s->_raw_size = 0; - } - } - - /* we should be able to set the size of the interworking stub section */ + /* We should be able to set the size of the interworking stub section */ /* Here we rummage through the found bfds to collect glue information */ /* FIXME: should this be based on a command line option? krk@cygnus.com */ @@ -1194,6 +96,9 @@ gld${EMULATION_NAME}_before_allocation () bfd_elf32_arm_allocate_interworking_sections (& link_info); } + +static void gld${EMULATION_NAME}_finish PARAMS ((void)); + static void gld${EMULATION_NAME}_finish PARAMS((void)) { @@ -1202,7 +107,8 @@ gld${EMULATION_NAME}_finish PARAMS((void)) if (thumb_entry_symbol == NULL) return; - h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, false, false, true); + h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, + false, false, true); if (h != (struct bfd_link_hash_entry *) NULL && (h->type == bfd_link_hash_defined @@ -1234,92 +140,48 @@ gld${EMULATION_NAME}_finish PARAMS((void)) entry_symbol = buffer; } else - einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol); + einfo (_("%P: warning: connot find thumb start symbol %s\n"), + thumb_entry_symbol); } -static char * -gld${EMULATION_NAME}_get_script (isfile) - int *isfile; EOF -if test -n "$COMPILE_IN" -then -# Scripts compiled in. +# Define some shell vars to insert bits of code into the standard elf +# parse_args and list_options functions. +# +PARSE_AND_LIST_PROLOGUE=' +#define OPTION_THUMB_ENTRY 301 +' -# sed commands to quote an ld script as a C string. -sc="-f stringify.sed" +PARSE_AND_LIST_SHORTOPTS=p -cat >>e${EMULATION_NAME}.c <<EOF -{ - *isfile = 0; - - if (link_info.relocateable == true && config.build_constructors == true) - return -EOF -sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c -echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c -echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c -echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c -if test -n "$GENERATE_SHLIB_SCRIPT" ; then - echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c - sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c -fi -echo ' ; else return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c -echo '; }' >> e${EMULATION_NAME}.c +PARSE_AND_LIST_LONGOPTS=' + { "no-pipeline-knowledge", no_argument, NULL, '\'p\''}, + { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, +' -else -# Scripts read from the filesystem. +PARSE_AND_LIST_OPTIONS=' + fprintf (file, _(" -p --no-pipeline-knowledge Stop the linker knowing about the pipeline length\n")); + fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); +' -cat >>e${EMULATION_NAME}.c <<EOF -{ - *isfile = 1; +PARSE_AND_LIST_ARGS_CASES=' + case '\'p\'': + no_pipeline_knowledge = 1; + break; - if (link_info.relocateable == true && config.build_constructors == true) - return "ldscripts/${EMULATION_NAME}.xu"; - else if (link_info.relocateable == true) - return "ldscripts/${EMULATION_NAME}.xr"; - else if (!config.text_read_only) - return "ldscripts/${EMULATION_NAME}.xbn"; - else if (!config.magic_demand_paged) - return "ldscripts/${EMULATION_NAME}.xn"; - else if (link_info.shared) - return "ldscripts/${EMULATION_NAME}.xs"; - else - return "ldscripts/${EMULATION_NAME}.x"; -} -EOF + case OPTION_THUMB_ENTRY: + thumb_entry_symbol = optarg; + break; +' -fi +# We have our own after_open and before_allocation functions, but they call +# the standard routines, so give them a different name. +LDEMUL_AFTER_OPEN=arm_elf_after_open +LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation -cat >>e${EMULATION_NAME}.c <<EOF +# Replace the elf before_parse function with our own. +LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse -struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = -{ - gld${EMULATION_NAME}_before_parse, - syslib_default, - hll_default, - after_parse_default, - gld${EMULATION_NAME}_after_open, - after_allocation_default, - set_output_arch_default, - ldemul_default_target, - gld${EMULATION_NAME}_before_allocation, - gld${EMULATION_NAME}_get_script, - "${EMULATION_NAME}", - "${OUTPUT_FORMAT}", - gld${EMULATION_NAME}_finish, - NULL, /* create output section statements */ - gld${EMULATION_NAME}_open_dynamic_archive, - gld${EMULATION_NAME}_place_orphan, - NULL, /* set symbols */ - gld${EMULATION_NAME}_parse_args, - NULL, /* unrecognized file */ - gld${EMULATION_NAME}_list_options, - NULL, /* recognized file */ - NULL /* find_potential_libraries */ -}; -EOF +# Call the extra arm-elf function +LDEMUL_FINISH=gld${EMULATION_NAME}_finish diff --git a/ld/emultempl/elf32.em b/ld/emultempl/elf32.em index f1e23fd..33004be 100644 --- a/ld/emultempl/elf32.em +++ b/ld/emultempl/elf32.em @@ -69,14 +69,35 @@ static boolean gld${EMULATION_NAME}_place_orphan PARAMS ((lang_input_statement_type *, asection *)); static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile)); +EOF + +# Import any needed special functions and/or overrides. +# +if test -n "$EXTRA_EM_FILE" ; then +. ${srcdir}/emultempl/${EXTRA_EM_FILE}.em +fi + +# Functions in this file can be overriden 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; then +cat >>e${EMULATION_NAME}.c <<EOF + static void -gld${EMULATION_NAME}_before_parse() +gld${EMULATION_NAME}_before_parse () { ldfile_output_architecture = 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`; } +EOF +fi + +cat >>e${EMULATION_NAME}.c <<EOF /* These variables are required to pass information back and forth between after_open and check_needed and stat_needed and vercheck. */ @@ -325,7 +346,7 @@ cat >>e${EMULATION_NAME}.c <<EOF return true; } - /* Tell the ELF backend that don't want the output file to have a + /* Tell the ELF backend that we don't want the output file to have a DT_NEEDED entry for this file. */ bfd_elf_set_dt_needed_name (abfd, ""); @@ -533,6 +554,10 @@ gld${EMULATION_NAME}_check_needed (s) } } +EOF + +if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then +cat >>e${EMULATION_NAME}.c <<EOF /* This is called after all the input files have been opened. */ @@ -654,6 +679,10 @@ cat >>e${EMULATION_NAME}.c <<EOF } } +EOF +fi + +cat >>e${EMULATION_NAME}.c <<EOF /* Look through an expression for an assignment statement. */ @@ -726,6 +755,10 @@ gld${EMULATION_NAME}_find_statement_assignment (s) gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp); } +EOF + +if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then +cat >>e${EMULATION_NAME}.c <<EOF /* This is called after the sections have been attached to output sections, but before any sizes or addresses have been set. */ @@ -801,6 +834,11 @@ gld${EMULATION_NAME}_before_allocation () } } +EOF +fi + +if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then +cat >>e${EMULATION_NAME}.c <<EOF /* Try to open a dynamic archive. This is where we know that ELF dynamic libraries have an extension of .so (or .sl on oddball systems @@ -884,8 +922,12 @@ gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry) return true; } +EOF +fi +cat >>e${EMULATION_NAME}.c <<EOF + +/* A variant of lang_output_section_find. Used by place_orphan. */ -/* A variant of lang_output_section_find. */ static lang_output_section_statement_type * output_rel_find () { @@ -907,18 +949,20 @@ output_rel_find () return (lang_output_section_statement_type *) NULL; } +EOF + +if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then +cat >>e${EMULATION_NAME}.c <<EOF /* Place an orphan section. We use this to put random SHF_ALLOC sections in the right segment. */ -struct orphan_save -{ +struct orphan_save { lang_output_section_statement_type *os; asection **section; lang_statement_union_type **stmt; }; -/*ARGSUSED*/ static boolean gld${EMULATION_NAME}_place_orphan (file, s) lang_input_statement_type *file; @@ -1137,9 +1181,14 @@ gld${EMULATION_NAME}_place_orphan (file, s) return true; } +EOF +fi + +if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then +cat >>e${EMULATION_NAME}.c <<EOF static char * -gld${EMULATION_NAME}_get_script(isfile) +gld${EMULATION_NAME}_get_script (isfile) int *isfile; EOF @@ -1194,26 +1243,14 @@ cat >>e${EMULATION_NAME}.c <<EOF else return "ldscripts/${EMULATION_NAME}.x"; } -EOF - -fi -if test -n "$PARSE_AND_LIST_ARGS_CASES" || test x"$GENERATE_SHLIB_SCRIPT" = xyes; then -NEED_PARSE_AND_LIST=yes - -cat >>e${EMULATION_NAME}.c <<EOF -static int gld_${EMULATION_NAME}_parse_args PARAMS ((int, char **)); -static void gld_${EMULATION_NAME}_list_options PARAMS ((FILE * file)); EOF -else -NEED_PARSE_AND_LIST=no +fi +fi -cat >>e${EMULATION_NAME}.c <<EOF -#define gld_${EMULATION_NAME}_parse_args NULL -#define gld_${EMULATION_NAME}_list_options NULL -EOF +if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then -fi +if test x"$LDEMUL_PARSE_ARGS" != xgld_"$EMULATION_NAME"_parse_args; then if test -n "$PARSE_AND_LIST_PROLOGUE" ; then cat >>e${EMULATION_NAME}.c <<EOF @@ -1221,7 +1258,6 @@ cat >>e${EMULATION_NAME}.c <<EOF EOF fi -if test "$NEED_PARSE_AND_LIST" = yes; then cat >>e${EMULATION_NAME}.c <<EOF #include "getopt.h" @@ -1232,7 +1268,6 @@ cat >>e${EMULATION_NAME}.c <<EOF static struct option longopts[] = { EOF -fi if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then cat >>e${EMULATION_NAME}.c <<EOF @@ -1251,12 +1286,13 @@ cat >>e${EMULATION_NAME}.c <<EOF EOF fi -if test "$NEED_PARSE_AND_LIST" = yes; then cat >>e${EMULATION_NAME}.c <<EOF {NULL, no_argument, NULL, 0} }; +static int gld_${EMULATION_NAME}_parse_args PARAMS ((int, char **)); + static int gld_${EMULATION_NAME}_parse_args (argc, argv) int argc; @@ -1272,7 +1308,9 @@ gld_${EMULATION_NAME}_parse_args (argc, argv) opterr = 0; wanterror = opterr; - optc = getopt_long_only (argc, argv, "-z:", longopts, &longind); + optc = getopt_long_only (argc, argv, + "-${PARSE_AND_LIST_SHORTOPTS}z:", longopts, + &longind); opterr = prevopterr; switch (optc) @@ -1284,7 +1322,6 @@ gld_${EMULATION_NAME}_parse_args (argc, argv) return 0; EOF -fi if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then cat >>e${EMULATION_NAME}.c <<EOF @@ -1332,20 +1369,25 @@ cat >>e${EMULATION_NAME}.c <<EOF EOF fi -if test "$NEED_PARSE_AND_LIST" = yes; then cat >>e${EMULATION_NAME}.c <<EOF } return 1; } +EOF +fi + +if test x"$LDEMUL_LIST_OPTIONS" != xgld_"$EMULATION_NAME"_list_options; then +cat >>e${EMULATION_NAME}.c <<EOF + +static void gld_${EMULATION_NAME}_list_options PARAMS ((FILE * file)); static void gld_${EMULATION_NAME}_list_options (file) FILE * file; { EOF -fi if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then cat >>e${EMULATION_NAME}.c <<EOF @@ -1371,43 +1413,54 @@ cat >>e${EMULATION_NAME}.c <<EOF EOF fi -if test "$NEED_PARSE_AND_LIST" = yes; then cat >>e${EMULATION_NAME}.c <<EOF } EOF -fi if test -n "$PARSE_AND_LIST_EPILOGUE" ; then cat >>e${EMULATION_NAME}.c <<EOF $PARSE_AND_LIST_EPILOGUE EOF fi +fi +else +if test x"$LDEMUL_PARSE_ARGS" != xgld_"$EMULATION_NAME"_parse_args; then +cat >>e${EMULATION_NAME}.c <<EOF +#define gld_${EMULATION_NAME}_parse_args NULL +EOF +fi +if test x"$LDEMUL_LIST_OPTIONS" != xgld_"$EMULATION_NAME"_list_options; then +cat >>e${EMULATION_NAME}.c <<EOF +#define gld_${EMULATION_NAME}_list_options NULL +EOF +fi +fi cat >>e${EMULATION_NAME}.c <<EOF struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = { - gld${EMULATION_NAME}_before_parse, - syslib_default, - hll_default, - after_parse_default, - gld${EMULATION_NAME}_after_open, - after_allocation_default, - set_output_arch_default, - ldemul_default_target, - gld${EMULATION_NAME}_before_allocation, - gld${EMULATION_NAME}_get_script, + ${LDEMUL_BEFORE_PARSE-gld${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-after_allocation_default}, + ${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}", - NULL, /* finish */ - NULL, /* create output section statements */ - gld${EMULATION_NAME}_open_dynamic_archive, - gld${EMULATION_NAME}_place_orphan, - NULL, /* set_symbols */ - gld_${EMULATION_NAME}_parse_args, - NULL, /* unrecognized_file */ - gld_${EMULATION_NAME}_list_options, - NULL, /* recognized_file */ - NULL /* find_potential_libraries */ + ${LDEMUL_FINISH-NULL}, + ${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}, + ${LDEMUL_PARSE_ARGS-gld_${EMULATION_NAME}_parse_args}, + ${LDEMUL_UNRECOGNIZED_FILE-NULL}, + ${LDEMUL_LIST_OPTIONS-gld_${EMULATION_NAME}_list_options}, + ${LDEMUL_RECOGNIZED_FILE-NULL}, + ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL}, }; EOF diff --git a/ld/emultempl/hppaelf.em b/ld/emultempl/hppaelf.em index dfa1d0a..3139785 100644 --- a/ld/emultempl/hppaelf.em +++ b/ld/emultempl/hppaelf.em @@ -1,73 +1,50 @@ # This shell script emits a C file. -*- C -*- -# It does some substitutions. -cat >e${EMULATION_NAME}.c <<EOF -/* This file is is generated by a shell script. DO NOT EDIT! */ - -/* An emulation for HP PA-RISC ELF linkers. - Copyright (C) 1991, 93, 94, 95, 97, 99, 2000 - Free Software Foundation, Inc. - Written by Steve Chamberlain steve@cygnus.com - -This file is part of GLD, the Gnu Linker. - -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 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 of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "bfd.h" -#include "sysdep.h" -#include <ctype.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" +# Copyright (C) 1991, 93, 94, 95, 97, 99, 2000 +# Free Software Foundation, Inc. +# +# This file is part of GLD, the Gnu Linker. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 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 of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +# + +# This file is sourced from elf32.em, and defines extra hppa-elf +# specific routines. +# +cat >>e${EMULATION_NAME}.c <<EOF + #include "ldctor.h" #include "elf32-hppa.h" -static void hppaelf_before_parse PARAMS ((void)); static void hppaelf_set_output_arch PARAMS ((void)); static void hppaelf_create_output_section_statements PARAMS ((void)); static void hppaelf_delete_padding_statements - PARAMS ((lang_statement_list_type *list)); + PARAMS ((lang_statement_list_type *)); +static asection *hppaelf_add_stub_section + PARAMS ((const char *, asection *)); +static void hppaelf_layaout_sections_again PARAMS ((void)); static void hppaelf_finish PARAMS ((void)); -static boolean gld${EMULATION_NAME}_place_orphan - PARAMS ((lang_input_statement_type *, asection *)); -static lang_output_section_statement_type *output_rel_find PARAMS ((void)); -static char *hppaelf_get_script PARAMS ((int *)); /* Fake input file for stubs. */ static lang_input_statement_type *stub_file; -/* Perform some emulation specific initialization. For PA ELF we set - up the local label prefix and the output architecture. */ - -static void -hppaelf_before_parse () -{ - ldfile_output_architecture = bfd_arch_hppa; -} /* Set the output architecture and machine. */ static void -hppaelf_set_output_arch() +hppaelf_set_output_arch () { unsigned long machine = 0; @@ -162,6 +139,9 @@ struct hook_stub_info /* Traverse the linker tree to find the spot where the stub goes. */ +static boolean hook_in_stub + PARAMS ((struct hook_stub_info *, lang_statement_union_type **)); + static boolean hook_in_stub (info, lp) struct hook_stub_info *info; @@ -230,6 +210,7 @@ hook_in_stub (info, lp) return false; } + /* Call-back for elf32_hppa_size_stubs. */ /* Create a new stub section, and arrange for it to be linked @@ -275,6 +256,7 @@ hppaelf_add_stub_section (stub_name, input_section) return NULL; } + /* Another call-back for elf32_hppa_size_stubs. */ static void @@ -312,10 +294,10 @@ hppaelf_finish () return; /* Call into the BFD backend to do the real work. */ - if (elf32_hppa_size_stubs (stub_file->the_bfd, - &link_info, - &hppaelf_add_stub_section, - &hppaelf_layaout_sections_again) == false) + if (! elf32_hppa_size_stubs (stub_file->the_bfd, + &link_info, + &hppaelf_add_stub_section, + &hppaelf_layaout_sections_again)) { einfo ("%X%P: can not size stub section: %E\n"); return; @@ -324,350 +306,15 @@ hppaelf_finish () /* Now build the linker stubs. */ if (stub_file->the_bfd->sections != NULL) { - if (elf32_hppa_build_stubs (stub_file->the_bfd, &link_info) == false) + if (! elf32_hppa_build_stubs (stub_file->the_bfd, &link_info)) einfo ("%X%P: can not build stubs: %E\n"); } } - -/* Place an orphan section. We use this to put random SHF_ALLOC - sections in the right segment. */ - -struct orphan_save -{ - lang_output_section_statement_type *os; - asection **section; - lang_statement_union_type **stmt; -}; - -/*ARGSUSED*/ -static boolean -gld${EMULATION_NAME}_place_orphan (file, s) - lang_input_statement_type *file; - asection *s; -{ - static struct orphan_save hold_text; - static struct orphan_save hold_rodata; - static struct orphan_save hold_data; - static struct orphan_save hold_bss; - static struct orphan_save hold_rel; - static struct orphan_save hold_interp; - struct orphan_save *place; - lang_statement_list_type *old; - lang_statement_list_type add; - etree_type *address; - const char *secname, *ps; - const char *outsecname; - lang_output_section_statement_type *os; - - secname = bfd_get_section_name (s->owner, s); - - /* Look through the script to see where to place this section. */ - os = lang_output_section_find (secname); - - if (os != NULL - && os->bfd_section != NULL - && ((s->flags ^ os->bfd_section->flags) & (SEC_LOAD | SEC_ALLOC)) == 0) - { - /* We have already placed a section with this name. */ - wild_doit (&os->children, s, os, file); - return true; - } - - if (hold_text.os == NULL) - hold_text.os = lang_output_section_find (".text"); - - /* If this is a final link, then always put .gnu.warning.SYMBOL - sections into the .text section to get them out of the way. */ - if (! link_info.shared - && ! link_info.relocateable - && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0 - && hold_text.os != NULL) - { - wild_doit (&hold_text.os->children, s, hold_text.os, file); - return true; - } - - /* Decide which segment the section should go in based on the - section name and section flags. We put loadable .note sections - right after the .interp section, so that the PT_NOTE segment is - stored right after the program headers where the OS can read it - in the first page. */ -#define HAVE_SECTION(hold, name) \ -(hold.os != NULL || (hold.os = lang_output_section_find (name)) != NULL) - - if (s->flags & SEC_EXCLUDE) - return false; - else if ((s->flags & SEC_ALLOC) == 0) - place = NULL; - else if ((s->flags & SEC_LOAD) != 0 - && strncmp (secname, ".note", 4) == 0 - && HAVE_SECTION (hold_interp, ".interp")) - place = &hold_interp; - else if ((s->flags & SEC_HAS_CONTENTS) == 0 - && HAVE_SECTION (hold_bss, ".bss")) - place = &hold_bss; - else if ((s->flags & SEC_READONLY) == 0 - && HAVE_SECTION (hold_data, ".data")) - place = &hold_data; - else if (strncmp (secname, ".rel", 4) == 0 - && (hold_rel.os != NULL - || (hold_rel.os = output_rel_find ()) != NULL)) - place = &hold_rel; - else if ((s->flags & SEC_CODE) == 0 - && (s->flags & SEC_READONLY) != 0 - && HAVE_SECTION (hold_rodata, ".rodata")) - place = &hold_rodata; - else if ((s->flags & SEC_READONLY) != 0 - && hold_text.os != NULL) - place = &hold_text; - else - place = NULL; - -#undef HAVE_SECTION - - /* Choose a unique name for the section. This will be needed if the - same section name appears in the input file with different - loadable or allocateable characteristics. */ - outsecname = secname; - if (bfd_get_section_by_name (output_bfd, outsecname) != NULL) - { - unsigned int len; - char *newname; - unsigned int i; - - len = strlen (outsecname); - newname = xmalloc (len + 5); - strcpy (newname, outsecname); - i = 0; - do - { - sprintf (newname + len, "%d", i); - ++i; - } - while (bfd_get_section_by_name (output_bfd, newname) != NULL); - - outsecname = newname; - } - - if (place != NULL) - { - /* Start building a list of statements for this section. */ - old = stat_ptr; - stat_ptr = &add; - lang_list_init (stat_ptr); - - /* If the name of the section is representable in C, then create - symbols to mark the start and the end of the section. */ - for (ps = outsecname; *ps != '\0'; ps++) - if (! isalnum ((unsigned char) *ps) && *ps != '_') - break; - if (*ps == '\0' && config.build_constructors) - { - char *symname; - etree_type *e_align; - - symname = (char *) xmalloc (ps - outsecname + sizeof "__start_"); - sprintf (symname, "__start_%s", outsecname); - e_align = exp_unop (ALIGN_K, - exp_intop ((bfd_vma) 1 << s->alignment_power)); - lang_add_assignment (exp_assop ('=', symname, e_align)); - } - } - - if (link_info.relocateable || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0) - address = exp_intop ((bfd_vma) 0); - else - address = NULL; - - os = lang_enter_output_section_statement (outsecname, address, 0, - (bfd_vma) 0, - (etree_type *) NULL, - (etree_type *) NULL, - (etree_type *) NULL); - - wild_doit (&os->children, s, os, file); - - lang_leave_output_section_statement - ((bfd_vma) 0, "*default*", - (struct lang_output_section_phdr_list *) NULL, "*default*"); - - if (place != NULL) - { - asection *snew, **pps; - - stat_ptr = &add; - - if (*ps == '\0' && config.build_constructors) - { - char *symname; - - symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_"); - sprintf (symname, "__stop_%s", outsecname); - lang_add_assignment (exp_assop ('=', symname, - exp_nameop (NAME, "."))); - } - stat_ptr = old; - - snew = os->bfd_section; - if (place->os->bfd_section != NULL || place->section != NULL) - { - /* Shuffle the section to make the output file look neater. */ - if (place->section == NULL) - { -#if 0 - /* Finding the end of the list is a little tricky. We - make a wild stab at it by comparing section flags. */ - flagword first_flags = place->os->bfd_section->flags; - for (pps = &place->os->bfd_section->next; - *pps != NULL && (*pps)->flags == first_flags; - pps = &(*pps)->next) - ; - place->section = pps; -#else - /* Put orphans after the first section on the list. */ - place->section = &place->os->bfd_section->next; -#endif - } - - /* Unlink the section. */ - for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next) - ; - *pps = snew->next; - - /* Now tack it on to the "place->os" section list. */ - snew->next = *place->section; - *place->section = snew; - } - place->section = &snew->next; /* Save the end of this list. */ - - if (place->stmt == NULL) - { - /* Put the new statement list right at the head. */ - *add.tail = place->os->header.next; - place->os->header.next = add.head; - } - else - { - /* Put it after the last orphan statement we added. */ - *add.tail = *place->stmt; - *place->stmt = add.head; - } - place->stmt = add.tail; /* Save the end of this list. */ - } - - return true; -} - -/* A variant of lang_output_section_find. */ -static lang_output_section_statement_type * -output_rel_find () -{ - lang_statement_union_type *u; - lang_output_section_statement_type *lookup; - - for (u = lang_output_section_statement.head; - u != (lang_statement_union_type *) NULL; - u = lookup->next) - { - lookup = &u->output_section_statement; - if (strncmp (".rel", lookup->name, 4) == 0 - && lookup->bfd_section != NULL - && (lookup->bfd_section->flags & SEC_ALLOC) != 0) - { - return lookup; - } - } - return (lang_output_section_statement_type *) NULL; -} - -/* The script itself gets inserted here. */ - -static char * -hppaelf_get_script(isfile) - int *isfile; EOF -if test -n "$COMPILE_IN" -then -# Scripts compiled in. - -# sed commands to quote an ld script as a C string. -sc="-f stringify.sed" - -cat >>e${EMULATION_NAME}.c <<EOF -{ - *isfile = 0; - - if (link_info.relocateable == true && config.build_constructors == true) - return -EOF -sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c -echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c -echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c -echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c - -if test -n "$GENERATE_SHLIB_SCRIPT" ; then -echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c -fi - -echo ' ; else return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c -echo '; }' >> e${EMULATION_NAME}.c - -else -# Scripts read from the filesystem. - -cat >>e${EMULATION_NAME}.c <<EOF -{ - *isfile = 1; - - if (link_info.relocateable == true && config.build_constructors == true) - return "ldscripts/${EMULATION_NAME}.xu"; - else if (link_info.relocateable == true) - return "ldscripts/${EMULATION_NAME}.xr"; - else if (!config.text_read_only) - return "ldscripts/${EMULATION_NAME}.xbn"; - else if (!config.magic_demand_paged) - return "ldscripts/${EMULATION_NAME}.xn"; - else if (link_info.shared) - return "ldscripts/${EMULATION_NAME}.xs"; - else - return "ldscripts/${EMULATION_NAME}.x"; -} -EOF - -fi - -cat >>e${EMULATION_NAME}.c <<EOF - -struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = -{ - hppaelf_before_parse, - syslib_default, - hll_default, - after_parse_default, - after_open_default, - after_allocation_default, - hppaelf_set_output_arch, - ldemul_default_target, - before_allocation_default, - hppaelf_get_script, - "${EMULATION_NAME}", - "elf32-hppa", - hppaelf_finish, - hppaelf_create_output_section_statements, - NULL, /* open dynamic */ - gld${EMULATION_NAME}_place_orphan, - NULL, /* set_symbols */ - NULL, /* parse_args */ - NULL, /* unrecognized_file */ - NULL, /* list_options */ - NULL, /* recognized_file */ - NULL /* find_potential_libraries */ -}; -EOF +# Put these routines in ld_${EMULATION_NAME}_emulation +# +LDEMUL_SET_OUTPUT_ARCH=hppaelf_set_output_arch +LDEMUL_FINISH=hppaelf_finish +LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements diff --git a/ld/emultempl/m68kcoff.em b/ld/emultempl/m68kcoff.em index 06422d3..5b62e8e 100644 --- a/ld/emultempl/m68kcoff.em +++ b/ld/emultempl/m68kcoff.em @@ -33,8 +33,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "ld.h" #include "ldmain.h" -#include "ldemul.h" #include "ldfile.h" +#include "ldemul.h" #include "ldmisc.h" static void gld${EMULATION_NAME}_before_parse PARAMS ((void)); |