* emultempl/aix.em: Add support for various AIX linker options,
for AIX import and export files, and for AIX shared objects. * scripttempl/aix.sc: Add .pad. Put .ds just before the TOC.
This commit is contained in:
Ian Lance Taylor
parent
7d6439d974
commit
57fc1e90b7
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@ -0,0 +1,665 @@
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# This shell script emits a C file. -*- C -*-
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# It does some substitutions.
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cat >e${EMULATION_NAME}.c <<EOF
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/* This file is is generated by a shell script. DO NOT EDIT! */
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/* AIX emulation code for ${EMULATION_NAME}
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Copyright (C) 1991, 1993, 1995 Free Software Foundation, Inc.
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Written by Steve Chamberlain <sac@cygnus.com>
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AIX support by Ian Lance Taylor <ian@cygnus.com>
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This file is part of GLD, the Gnu Linker.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#define TARGET_IS_${EMULATION_NAME}
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#include "bfd.h"
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#include "sysdep.h"
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#include "libiberty.h"
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#include "getopt.h"
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#include "bfdlink.h"
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#include <ctype.h>
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#include "ld.h"
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#include "ldmain.h"
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#include "ldemul.h"
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#include "ldfile.h"
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#include "ldmisc.h"
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#include "ldexp.h"
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#include "ldlang.h"
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static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
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static int gld${EMULATION_NAME}_parse_args PARAMS ((int, char **));
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static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
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static void gld${EMULATION_NAME}_read_file PARAMS ((const char *, boolean));
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static void gld${EMULATION_NAME}_free PARAMS ((PTR));
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static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
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/* The file alignment required for each section. */
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static unsigned long file_align;
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/* The maximum size the stack is permitted to grow. This is stored in
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the a.out header. */
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static unsigned long maxstack;
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/* The maximum data size. This is stored in the a.out header. */
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static unsigned long maxdata;
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/* Whether to perform garbage collection. */
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static int gc = 1;
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/* The module type to use. */
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static unsigned short modtype = ('1' << 8) | 'L';
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/* Whether the .text section must be read-only (i.e., no relocs
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permitted). */
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static int textro;
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/* Structure used to hold import or export file list. */
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struct filelist
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{
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struct filelist *next;
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const char *name;
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};
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/* List of import files. */
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struct filelist *import_files;
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/* List of export files. */
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struct filelist *export_files;
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static void
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gld${EMULATION_NAME}_before_parse()
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{
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#ifndef TARGET_ /* I.e., if not generic. */
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ldfile_output_architecture = bfd_arch_${ARCH};
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#endif /* not TARGET_ */
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}
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/* Handle AIX specific options. */
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static int
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gld${EMULATION_NAME}_parse_args (argc, argv)
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int argc;
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char **argv;
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{
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int prevoptind = optind;
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int prevopterr = opterr;
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int longind;
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int optc;
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long val;
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char *end;
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#define OPTION_IGNORE (300)
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#define OPTION_AUTOIMP (OPTION_IGNORE + 1)
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#define OPTION_ERNOTOK (OPTION_AUTOIMP + 1)
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#define OPTION_EROK (OPTION_ERNOTOK + 1)
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#define OPTION_EXPORT (OPTION_EROK + 1)
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#define OPTION_IMPORT (OPTION_EXPORT + 1)
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#define OPTION_MAXDATA (OPTION_IMPORT + 1)
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#define OPTION_MAXSTACK (OPTION_MAXDATA + 1)
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#define OPTION_MODTYPE (OPTION_MAXSTACK + 1)
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#define OPTION_NOAUTOIMP (OPTION_MODTYPE + 1)
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#define OPTION_NOSTRCMPCT (OPTION_NOAUTOIMP + 1)
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#define OPTION_STRCMPCT (OPTION_NOSTRCMPCT + 1)
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static struct option longopts[] = {
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{"basis", no_argument, NULL, OPTION_IGNORE},
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{"bautoimp", no_argument, NULL, OPTION_AUTOIMP},
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{"bcomprld", no_argument, NULL, OPTION_IGNORE},
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{"bcrld", no_argument, NULL, OPTION_IGNORE},
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{"bcror31", no_argument, NULL, OPTION_IGNORE},
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{"bD", required_argument, NULL, OPTION_MAXDATA},
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{"bE", required_argument, NULL, OPTION_EXPORT},
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{"bernotok", no_argument, NULL, OPTION_ERNOTOK},
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{"berok", no_argument, NULL, OPTION_EROK},
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{"berrmsg", no_argument, NULL, OPTION_IGNORE},
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{"bexport", required_argument, NULL, OPTION_EXPORT},
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{"bf", no_argument, NULL, OPTION_ERNOTOK},
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{"bgc", no_argument, &gc, 1},
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{"bh", required_argument, NULL, OPTION_IGNORE},
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{"bhalt", required_argument, NULL, OPTION_IGNORE},
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{"bI", required_argument, NULL, OPTION_IMPORT},
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{"bimport", required_argument, NULL, OPTION_IMPORT},
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{"bmaxdata", required_argument, NULL, OPTION_MAXDATA},
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{"bmaxstack", required_argument, NULL, OPTION_MAXSTACK},
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{"bM", required_argument, NULL, OPTION_MODTYPE},
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{"bmodtype", required_argument, NULL, OPTION_MODTYPE},
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{"bnoautoimp", no_argument, NULL, OPTION_NOAUTOIMP},
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{"bnodelcsect", no_argument, NULL, OPTION_IGNORE},
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{"bnogc", no_argument, &gc, 0},
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{"bnso", no_argument, NULL, OPTION_NOAUTOIMP},
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{"bnostrcmpct", no_argument, NULL, OPTION_NOSTRCMPCT},
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{"bnotextro", no_argument, &textro, 0},
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{"bnro", no_argument, &textro, 0},
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{"bro", no_argument, &textro, 1},
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{"bS", required_argument, NULL, OPTION_MAXSTACK},
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{"bso", no_argument, NULL, OPTION_AUTOIMP},
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{"bstrcmpct", no_argument, NULL, OPTION_STRCMPCT},
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{"btextro", no_argument, &textro, 1},
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{NULL, no_argument, NULL, 0}
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};
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/* Options supported by the AIX linker which we do not support: -f,
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-S, -v, -Z, -bbindcmds, -bbinder, -bbindopts, -bcalls, -bcaps,
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-bcror15, -bdebugopt, -bdbg, -bdelcsect, -bex?, -bfilelist, -bfl,
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-bgcbypass, -bglink, -binsert, -bi, -bloadmap, -bl, -bmap, -bnl,
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-bnobind, -bnocomprld, -bnocrld, -bnoerrmsg, -bnoglink,
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-bnoloadmap, -bnl, -bnoobjreorder, -bnoquiet, -bnoreorder,
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-bnotypchk, -bnox, -bquiet, -bR, -brename, -breorder, -btypchk,
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-bx, -bX, -bxref. */
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/* If the first option starts with -b, change the first : to an =.
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The AIX linker uses : to separate the option from the argument;
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changing it to = lets us treat it as a getopt option. */
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if (optind < argc && strncmp (argv[optind], "-b", 2) == 0)
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{
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char *s;
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for (s = argv[optind]; *s != '\0'; s++)
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{
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if (*s == ':')
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{
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*s = '=';
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break;
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}
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}
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}
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opterr = 0;
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optc = getopt_long_only (argc, argv, "-D:H:KT:z", longopts, &longind);
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opterr = prevopterr;
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switch (optc)
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{
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default:
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optind = prevoptind;
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return 0;
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case 'D':
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val = strtol (optarg, &end, 0);
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if (*end != '\0')
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einfo ("%P: warning: ignoring invalid -D number %s\n", optarg);
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else if (val != -1)
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lang_section_start (".data", exp_intop (val));
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break;
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case 'H':
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val = strtoul (optarg, &end, 0);
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if (*end != '\0'
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|| (val & (val - 1)) != 0)
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einfo ("%P: warning: ignoring invalid -H number %s\n", optarg);
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else
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file_align = val;
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break;
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case 'K':
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case 'z':
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/* FIXME: This should use the page size for the target system. */
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file_align = 4096;
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break;
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case 'T':
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/* On AIX this is the same as GNU ld -Ttext. When we see -T
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number, we assume the AIX option is intended. Otherwise, we
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assume the usual GNU ld -T option is intended. We can't just
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ignore the AIX option, because gcc passes it to the linker. */
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val = strtoul (optarg, &end, 0);
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if (*end != '\0')
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{
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optind = prevoptind;
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return 0;
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}
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lang_section_start (".text", exp_intop (val));
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break;
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case OPTION_IGNORE:
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break;
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case OPTION_AUTOIMP:
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link_info.static_link = false;
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break;
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case OPTION_ERNOTOK:
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force_make_executable = false;
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break;
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case OPTION_EROK:
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force_make_executable = true;
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break;
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case OPTION_EXPORT:
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case OPTION_IMPORT:
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{
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struct filelist *n;
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struct filelist **flpp;
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n = (struct filelist *) xmalloc (sizeof (struct filelist));
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n->next = NULL;
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n->name = optarg;
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if (optc == OPTION_EXPORT)
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flpp = &export_files;
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else
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flpp = &import_files;
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while (*flpp != NULL)
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flpp = &(*flpp)->next;
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*flpp = n;
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}
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break;
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case OPTION_MAXDATA:
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val = strtoul (optarg, &end, 0);
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if (*end != '\0')
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einfo ("%P: warning: ignoring invalid -bmaxdata number %s\n",
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optarg);
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else
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maxdata = val;
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break;
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case OPTION_MAXSTACK:
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val = strtoul (optarg, &end, 0);
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if (*end != '\0')
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einfo ("%P: warning: ignoring invalid -bmaxstack number %s\n",
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optarg);
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else
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maxstack = val;
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break;
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case OPTION_MODTYPE:
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if (*optarg == 'S')
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{
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link_info.shared = true;
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++optarg;
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}
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if (*optarg == '\0' || optarg[1] == '\0')
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einfo ("%P: warning: ignoring invalid module type %s\n", optarg);
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else
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modtype = (*optarg << 8) | optarg[1];
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break;
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case OPTION_NOAUTOIMP:
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link_info.static_link = true;
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break;
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case OPTION_NOSTRCMPCT:
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config.traditional_format = true;
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break;
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case OPTION_STRCMPCT:
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config.traditional_format = false;
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break;
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}
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return 1;
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}
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/* This is called after the sections have been attached to output
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sections, but before any sizes or addresses have been set. */
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static void
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gld${EMULATION_NAME}_before_allocation ()
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{
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struct filelist *fl;
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char *libpath;
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/* Handle the import and export files, if any. */
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for (fl = import_files; fl != NULL; fl = fl->next)
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gld${EMULATION_NAME}_read_file (fl->name, true);
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for (fl = export_files; fl != NULL; fl = fl->next)
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gld${EMULATION_NAME}_read_file (fl->name, false);
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/* We need to build LIBPATH from the -L arguments. If any -rpath
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arguments were used, though, we use -rpath instead, as a GNU
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extension. */
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if (command_line.rpath != NULL)
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libpath = command_line.rpath;
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else if (search_head == NULL)
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libpath = (char *) "";
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else
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{
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size_t len;
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search_dirs_type *search;
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len = strlen (search_head->name);
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libpath = xmalloc (len + 1);
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strcpy (libpath, search_head->name);
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for (search = search_head->next; search != NULL; search = search->next)
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{
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size_t nlen;
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nlen = strlen (search->name);
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libpath = xrealloc (libpath, len + nlen + 2);
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libpath[len] = ':';
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strcpy (libpath + len + 1, search->name);
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len += nlen + 1;
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}
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}
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/* Let the XCOFF backend set up the .loader section. */
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if (! bfd_xcoff_size_dynamic_sections (output_bfd, &link_info, libpath,
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entry_symbol, file_align,
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maxstack, maxdata,
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gc ? true : false,
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modtype,
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textro ? true : false))
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einfo ("%P%F: failed to set dynamic section sizes: %E\n");
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}
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/* Read an import or export file. */
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static void
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gld${EMULATION_NAME}_read_file (filename, import)
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const char *filename;
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boolean import;
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{
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struct obstack *o;
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FILE *f;
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int lineno;
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int c;
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boolean keep;
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const char *imppath;
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const char *impfile;
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const char *impmember;
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o = (struct obstack *) xmalloc (sizeof (struct obstack));
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obstack_specify_allocation (o, 0, 0, xmalloc, gld${EMULATION_NAME}_free);
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f = fopen (filename, "r");
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if (f == NULL)
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{
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bfd_set_error (bfd_error_system_call);
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einfo ("%F%s: %E\n", filename);
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}
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keep = false;
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imppath = NULL;
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impfile = NULL;
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impmember = NULL;
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lineno = 0;
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while ((c = getc (f)) != EOF)
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{
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char *s;
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char *symname;
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boolean syscall;
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||||
bfd_vma address;
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struct bfd_link_hash_entry *h;
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if (c != '\n')
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{
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obstack_1grow (o, c);
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continue;
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}
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obstack_1grow (o, '\0');
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++lineno;
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s = (char *) obstack_base (o);
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while (isspace ((unsigned char) *s))
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++s;
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if (*s == '\0'
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|| *s == '*'
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|| (*s == '#' && s[1] == ' ')
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|| (! import && *s == '#' && s[1] == '!'))
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{
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obstack_free (o, obstack_base (o));
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continue;
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||||
}
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||||
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||||
if (*s == '#' && s[1] == '!')
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||||
{
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s += 2;
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while (isspace ((unsigned char) *s))
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++s;
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if (*s == '\0')
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{
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imppath = NULL;
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impfile = NULL;
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impmember = NULL;
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obstack_free (o, obstack_base (o));
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}
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else if (*s == '(')
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einfo ("%F%s%d: #! ([member]) is not supported in import files",
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filename, lineno);
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else
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{
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char cs;
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char *file;
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(void) obstack_finish (o);
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keep = true;
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imppath = s;
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impfile = NULL;
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while (! isspace ((unsigned char) *s) && *s != '(' && *s != '\0')
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{
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if (*s == '/')
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file = s + 1;
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++s;
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}
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if (file != NULL)
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{
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file[-1] = '\0';
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impfile = file;
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if (imppath == file - 1)
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imppath = "/";
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}
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else
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{
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impfile = imppath;
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imppath = "";
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}
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cs = *s;
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||||
*s = '\0';
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while (isspace ((unsigned char) cs))
|
||||
{
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++s;
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cs = *s;
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}
|
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if (cs != '(')
|
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{
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impmember = "";
|
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if (cs != '\0')
|
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einfo ("%s:%d: warning: syntax error in import file\n",
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filename, lineno);
|
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}
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else
|
||||
{
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++s;
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impmember = s;
|
||||
while (*s != ')' && *s != '\0')
|
||||
++s;
|
||||
if (*s == ')')
|
||||
*s = '\0';
|
||||
else
|
||||
einfo ("%s:%d: warning: syntax error in import file\n",
|
||||
filename, lineno);
|
||||
}
|
||||
}
|
||||
|
||||
continue;
|
||||
}
|
||||
|
||||
/* This is a symbol to be imported or exported. */
|
||||
symname = s;
|
||||
syscall = false;
|
||||
address = (bfd_vma) -1;
|
||||
|
||||
while (! isspace ((unsigned char) *s) && *s != '\0')
|
||||
++s;
|
||||
if (*s != '\0')
|
||||
{
|
||||
char *se;
|
||||
|
||||
*s++ = '\0';
|
||||
|
||||
while (isspace ((unsigned char) *s))
|
||||
++s;
|
||||
|
||||
se = s;
|
||||
while (! isspace ((unsigned char) *se) && *se != '\0')
|
||||
++se;
|
||||
if (*se != '\0')
|
||||
{
|
||||
*se++ = '\0';
|
||||
while (isspace ((unsigned char) *se))
|
||||
++se;
|
||||
if (*se != '\0')
|
||||
einfo ("%s%d: warning: syntax error in import/export file\n",
|
||||
filename, lineno);
|
||||
}
|
||||
|
||||
if (strcasecmp (s, "svc") == 0
|
||||
|| strcasecmp (s, "syscall") == 0)
|
||||
syscall = true;
|
||||
else
|
||||
{
|
||||
char *end;
|
||||
|
||||
address = strtoul (s, &end, 0);
|
||||
if (*end != '\0')
|
||||
einfo ("%s:%d: warning: syntax error in import/export file\n",
|
||||
filename, lineno);
|
||||
}
|
||||
}
|
||||
|
||||
h = bfd_link_hash_lookup (link_info.hash, symname, false, false, true);
|
||||
if (h == NULL || h->type == bfd_link_hash_new)
|
||||
{
|
||||
/* We can just ignore attempts to import an unreferenced
|
||||
symbol. */
|
||||
if (! import)
|
||||
einfo ("%X%s:%d: attempt to export undefined symbol %s\n",
|
||||
filename, lineno, symname);
|
||||
}
|
||||
else if (import)
|
||||
{
|
||||
if (! bfd_xcoff_import_symbol (output_bfd, &link_info, h, address,
|
||||
imppath, impfile, impmember))
|
||||
einfo ("%X%s:%d: failed to import symbol %s: %E\n",
|
||||
filename, lineno, symname);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (! bfd_xcoff_export_symbol (output_bfd, &link_info, h, syscall))
|
||||
einfo ("%X%s:%d: failed to export symbol %s: %E\n",
|
||||
filename, lineno, symname);
|
||||
}
|
||||
|
||||
obstack_free (o, obstack_base (o));
|
||||
}
|
||||
|
||||
if (obstack_object_size (o) > 0)
|
||||
{
|
||||
einfo ("%s:%d: warning: ignoring unterminated last line\n",
|
||||
filename, lineno);
|
||||
obstack_free (o, obstack_base (o));
|
||||
}
|
||||
|
||||
if (! keep)
|
||||
{
|
||||
obstack_free (o, NULL);
|
||||
free (o);
|
||||
}
|
||||
}
|
||||
|
||||
/* This routine saves us from worrying about declaring free. */
|
||||
|
||||
static void
|
||||
gld${EMULATION_NAME}_free (p)
|
||||
PTR p;
|
||||
{
|
||||
free (p);
|
||||
}
|
||||
|
||||
static char *
|
||||
gld${EMULATION_NAME}_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 ${srcdir}/emultempl/stringify.sed"
|
||||
|
||||
cat >>e${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${EMULATION_NAME}.c
|
||||
echo ' ; else return' >> e${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/${EMULATION_NAME}.xn";
|
||||
else
|
||||
return "ldscripts/${EMULATION_NAME}.x";
|
||||
}
|
||||
EOF
|
||||
|
||||
fi
|
||||
|
||||
cat >>e${EMULATION_NAME}.c <<EOF
|
||||
|
||||
struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
|
||||
{
|
||||
gld${EMULATION_NAME}_before_parse,
|
||||
syslib_default,
|
||||
hll_default,
|
||||
after_parse_default,
|
||||
after_open_default,
|
||||
after_allocation_default,
|
||||
set_output_arch_default,
|
||||
ldemul_default_target,
|
||||
gld${EMULATION_NAME}_before_allocation,
|
||||
gld${EMULATION_NAME}_get_script,
|
||||
"${EMULATION_NAME}",
|
||||
"${OUTPUT_FORMAT}",
|
||||
0, /* finish */
|
||||
0, /* create_output_section_statements */
|
||||
0, /* open_dynamic_archive */
|
||||
0, /* place_orphan */
|
||||
0, /* set_symbols */
|
||||
gld${EMULATION_NAME}_parse_args,
|
||||
};
|
||||
EOF
|
||||
|
|
@ -0,0 +1,50 @@
|
|||
# AIX linker script.
|
||||
# AIX always uses shared libraries. The section VMA appears to be
|
||||
# unimportant. The native linker aligns the sections on boundaries
|
||||
# specified by the -H option.
|
||||
cat <<EOF
|
||||
OUTPUT_ARCH(${ARCH})
|
||||
ENTRY(__start)
|
||||
SECTIONS
|
||||
{
|
||||
.pad 0 : { *(.pad) }
|
||||
${RELOCATING+PROVIDE (_text = .);}
|
||||
.text ${RELOCATING-0} : {
|
||||
*(.text)
|
||||
*(.pr)
|
||||
*(.ro)
|
||||
*(.db)
|
||||
*(.gl)
|
||||
*(.xo)
|
||||
*(.ti)
|
||||
*(.tb)
|
||||
}
|
||||
${RELOCATING+PROVIDE (_etext = .);}
|
||||
${RELOCATING+PROVIDE (_data = .);}
|
||||
.data ${RELOCATING-0} : {
|
||||
*(.data)
|
||||
*(.rw)
|
||||
*(.sv)
|
||||
*(.ua)
|
||||
*(.ds)
|
||||
*(.tc0)
|
||||
*(.tc)
|
||||
*(.td)
|
||||
}
|
||||
${RELOCATING+PROVIDE (_edata = .);}
|
||||
.bss : {
|
||||
*(.bss)
|
||||
*(.bs)
|
||||
*(.uc)
|
||||
*(COMMON)
|
||||
}
|
||||
${RELOCATING+PROVIDE (_end = .);}
|
||||
${RELOCATING+PROVIDE (end = .);}
|
||||
.loader 0 : {
|
||||
*(.loader)
|
||||
}
|
||||
.debug 0 : {
|
||||
*(.debug)
|
||||
}
|
||||
}
|
||||
EOF
|
||||
Loading…
Reference in New Issue