* 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.

2 files changed, 715 insertions, 0 deletions

diff --git a/ld/emultempl/aix.em b/ld/emultempl/aix.em
new file mode 100644
index 0000000..256c24f
--- /dev/null
+++ b/ld/emultempl/aix.em
@@ -0,0 +1,665 @@
+# 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! */
+
+/* AIX emulation code for ${EMULATION_NAME}
+   Copyright (C) 1991, 1993, 1995 Free Software Foundation, Inc.
+   Written by Steve Chamberlain <sac@cygnus.com>
+   AIX support by Ian Lance Taylor <ian@cygnus.com>
+
+This file is part of GLD, the Gnu Linker.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#define TARGET_IS_${EMULATION_NAME}
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libiberty.h"
+#include "getopt.h"
+#include "bfdlink.h"
+
+#include <ctype.h>
+
+#include "ld.h"
+#include "ldmain.h"
+#include "ldemul.h"
+#include "ldfile.h"
+#include "ldmisc.h"
+#include "ldexp.h"
+#include "ldlang.h"
+
+static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
+static int gld${EMULATION_NAME}_parse_args PARAMS ((int, char **));
+static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
+static void gld${EMULATION_NAME}_read_file PARAMS ((const char *, boolean));
+static void gld${EMULATION_NAME}_free PARAMS ((PTR));
+static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
+
+/* The file alignment required for each section.  */
+static unsigned long file_align;
+
+/* The maximum size the stack is permitted to grow.  This is stored in
+   the a.out header.  */
+static unsigned long maxstack;
+
+/* The maximum data size.  This is stored in the a.out header.  */
+static unsigned long maxdata;
+
+/* Whether to perform garbage collection.  */
+static int gc = 1;
+
+/* The module type to use.  */
+static unsigned short modtype = ('1' << 8) | 'L';
+
+/* Whether the .text section must be read-only (i.e., no relocs
+   permitted).  */
+static int textro;
+
+/* Structure used to hold import or export file list.  */
+
+struct filelist
+{
+  struct filelist *next;
+  const char *name;
+};
+
+/* List of import files.  */
+struct filelist *import_files;
+
+/* List of export files.  */
+struct filelist *export_files;
+
+static void
+gld${EMULATION_NAME}_before_parse()
+{
+#ifndef TARGET_			/* I.e., if not generic.  */
+  ldfile_output_architecture = bfd_arch_${ARCH};
+#endif /* not TARGET_ */
+}
+
+/* Handle AIX specific options.  */
+
+static int
+gld${EMULATION_NAME}_parse_args (argc, argv)
+     int argc;
+     char **argv;
+{
+  int prevoptind = optind;
+  int prevopterr = opterr;
+  int longind;
+  int optc;
+  long val;
+  char *end;
+
+#define OPTION_IGNORE (300)
+#define OPTION_AUTOIMP (OPTION_IGNORE + 1)
+#define OPTION_ERNOTOK (OPTION_AUTOIMP + 1)
+#define OPTION_EROK (OPTION_ERNOTOK + 1)
+#define OPTION_EXPORT (OPTION_EROK + 1)
+#define OPTION_IMPORT (OPTION_EXPORT + 1)
+#define OPTION_MAXDATA (OPTION_IMPORT + 1)
+#define OPTION_MAXSTACK (OPTION_MAXDATA + 1)
+#define OPTION_MODTYPE (OPTION_MAXSTACK + 1)
+#define OPTION_NOAUTOIMP (OPTION_MODTYPE + 1)
+#define OPTION_NOSTRCMPCT (OPTION_NOAUTOIMP + 1)
+#define OPTION_STRCMPCT (OPTION_NOSTRCMPCT + 1)
+
+  static struct option longopts[] = {
+    {"basis", no_argument, NULL, OPTION_IGNORE},
+    {"bautoimp", no_argument, NULL, OPTION_AUTOIMP},
+    {"bcomprld", no_argument, NULL, OPTION_IGNORE},
+    {"bcrld", no_argument, NULL, OPTION_IGNORE},
+    {"bcror31", no_argument, NULL, OPTION_IGNORE},
+    {"bD", required_argument, NULL, OPTION_MAXDATA},
+    {"bE", required_argument, NULL, OPTION_EXPORT},
+    {"bernotok", no_argument, NULL, OPTION_ERNOTOK},
+    {"berok", no_argument, NULL, OPTION_EROK},
+    {"berrmsg", no_argument, NULL, OPTION_IGNORE},
+    {"bexport", required_argument, NULL, OPTION_EXPORT},
+    {"bf", no_argument, NULL, OPTION_ERNOTOK},
+    {"bgc", no_argument, &gc, 1},
+    {"bh", required_argument, NULL, OPTION_IGNORE},
+    {"bhalt", required_argument, NULL, OPTION_IGNORE},
+    {"bI", required_argument, NULL, OPTION_IMPORT},
+    {"bimport", required_argument, NULL, OPTION_IMPORT},
+    {"bmaxdata", required_argument, NULL, OPTION_MAXDATA},
+    {"bmaxstack", required_argument, NULL, OPTION_MAXSTACK},
+    {"bM", required_argument, NULL, OPTION_MODTYPE},
+    {"bmodtype", required_argument, NULL, OPTION_MODTYPE},
+    {"bnoautoimp", no_argument, NULL, OPTION_NOAUTOIMP},
+    {"bnodelcsect", no_argument, NULL, OPTION_IGNORE},
+    {"bnogc", no_argument, &gc, 0},
+    {"bnso", no_argument, NULL, OPTION_NOAUTOIMP},
+    {"bnostrcmpct", no_argument, NULL, OPTION_NOSTRCMPCT},
+    {"bnotextro", no_argument, &textro, 0},
+    {"bnro", no_argument, &textro, 0},
+    {"bro", no_argument, &textro, 1},
+    {"bS", required_argument, NULL, OPTION_MAXSTACK},
+    {"bso", no_argument, NULL, OPTION_AUTOIMP},
+    {"bstrcmpct", no_argument, NULL, OPTION_STRCMPCT},
+    {"btextro", no_argument, &textro, 1},
+    {NULL, no_argument, NULL, 0}
+  };
+
+  /* Options supported by the AIX linker which we do not support: -f,
+     -S, -v, -Z, -bbindcmds, -bbinder, -bbindopts, -bcalls, -bcaps,
+     -bcror15, -bdebugopt, -bdbg, -bdelcsect, -bex?, -bfilelist, -bfl,
+     -bgcbypass, -bglink, -binsert, -bi, -bloadmap, -bl, -bmap, -bnl,
+     -bnobind, -bnocomprld, -bnocrld, -bnoerrmsg, -bnoglink,
+     -bnoloadmap, -bnl, -bnoobjreorder, -bnoquiet, -bnoreorder,
+     -bnotypchk, -bnox, -bquiet, -bR, -brename, -breorder, -btypchk,
+     -bx, -bX, -bxref.  */
+
+  /* If the first option starts with -b, change the first : to an =.
+     The AIX linker uses : to separate the option from the argument;
+     changing it to = lets us treat it as a getopt option.  */
+  if (optind < argc && strncmp (argv[optind], "-b", 2) == 0)
+    {
+      char *s;
+
+      for (s = argv[optind]; *s != '\0'; s++)
+	{
+	  if (*s == ':')
+	    {
+	      *s = '=';
+	      break;
+	    }
+	}
+    }
+
+  opterr = 0;
+  optc = getopt_long_only (argc, argv, "-D:H:KT:z", longopts, &longind);
+  opterr = prevopterr;
+
+  switch (optc)
+    {
+    default:
+      optind = prevoptind;
+      return 0;
+
+    case 'D':
+      val = strtol (optarg, &end, 0);
+      if (*end != '\0')
+	einfo ("%P: warning: ignoring invalid -D number %s\n", optarg);
+      else if (val != -1)
+	lang_section_start (".data", exp_intop (val));
+      break;
+
+    case 'H':
+      val = strtoul (optarg, &end, 0);
+      if (*end != '\0'
+	  || (val & (val - 1)) != 0)
+	einfo ("%P: warning: ignoring invalid -H number %s\n", optarg);
+      else
+	file_align = val;
+      break;
+
+    case 'K':
+    case 'z':
+      /* FIXME: This should use the page size for the target system.  */
+      file_align = 4096;
+      break;
+
+    case 'T':
+      /* On AIX this is the same as GNU ld -Ttext.  When we see -T
+         number, we assume the AIX option is intended.  Otherwise, we
+         assume the usual GNU ld -T option is intended.  We can't just
+         ignore the AIX option, because gcc passes it to the linker.  */
+      val = strtoul (optarg, &end, 0);
+      if (*end != '\0')
+	{
+	  optind = prevoptind;
+	  return 0;
+	}
+      lang_section_start (".text", exp_intop (val));
+      break;
+
+    case OPTION_IGNORE:
+      break;
+
+    case OPTION_AUTOIMP:
+      link_info.static_link = false;
+      break;
+
+    case OPTION_ERNOTOK:
+      force_make_executable = false;
+      break;
+
+    case OPTION_EROK:
+      force_make_executable = true;
+      break;
+
+    case OPTION_EXPORT:
+    case OPTION_IMPORT:
+      {
+	struct filelist *n;
+	struct filelist **flpp;
+
+	n = (struct filelist *) xmalloc (sizeof (struct filelist));
+	n->next = NULL;
+	n->name = optarg;
+	if (optc == OPTION_EXPORT)
+	  flpp = &export_files;
+	else
+	  flpp = &import_files;
+	while (*flpp != NULL)
+	  flpp = &(*flpp)->next;
+	*flpp = n;
+      }
+      break;
+
+    case OPTION_MAXDATA:
+      val = strtoul (optarg, &end, 0);
+      if (*end != '\0')
+	einfo ("%P: warning: ignoring invalid -bmaxdata number %s\n",
+	       optarg);
+      else
+	maxdata = val;
+      break;
+
+    case OPTION_MAXSTACK:
+      val = strtoul (optarg, &end, 0);
+      if (*end != '\0')
+	einfo ("%P: warning: ignoring invalid -bmaxstack number %s\n",
+	       optarg);
+      else
+	maxstack = val;
+      break;
+
+    case OPTION_MODTYPE:
+      if (*optarg == 'S')
+	{
+	  link_info.shared = true;
+	  ++optarg;
+	}
+      if (*optarg == '\0' || optarg[1] == '\0')
+	einfo ("%P: warning: ignoring invalid module type %s\n", optarg);
+      else
+	modtype = (*optarg << 8) | optarg[1];
+      break;
+
+    case OPTION_NOAUTOIMP:
+      link_info.static_link = true;
+      break;
+
+    case OPTION_NOSTRCMPCT:
+      config.traditional_format = true;
+      break;
+
+    case OPTION_STRCMPCT:
+      config.traditional_format = false;
+      break;
+    }
+
+  return 1;
+}
+
+/* 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 ()
+{
+  struct filelist *fl;
+  char *libpath;
+
+  /* Handle the import and export files, if any.  */
+  for (fl = import_files; fl != NULL; fl = fl->next)
+    gld${EMULATION_NAME}_read_file (fl->name, true);
+  for (fl = export_files; fl != NULL; fl = fl->next)
+    gld${EMULATION_NAME}_read_file (fl->name, false);
+
+  /* We need to build LIBPATH from the -L arguments.  If any -rpath
+     arguments were used, though, we use -rpath instead, as a GNU
+     extension.  */
+  if (command_line.rpath != NULL)
+    libpath = command_line.rpath;
+  else if (search_head == NULL)
+    libpath = (char *) "";
+  else
+    {
+      size_t len;
+      search_dirs_type *search;
+
+      len = strlen (search_head->name);
+      libpath = xmalloc (len + 1);
+      strcpy (libpath, search_head->name);
+      for (search = search_head->next; search != NULL; search = search->next)
+	{
+	  size_t nlen;
+
+	  nlen = strlen (search->name);
+	  libpath = xrealloc (libpath, len + nlen + 2);
+	  libpath[len] = ':';
+	  strcpy (libpath + len + 1, search->name);
+	  len += nlen + 1;
+	}
+    }
+
+  /* Let the XCOFF backend set up the .loader section.  */
+  if (! bfd_xcoff_size_dynamic_sections (output_bfd, &link_info, libpath,
+					 entry_symbol, file_align,
+					 maxstack, maxdata,
+					 gc ? true : false,
+					 modtype,
+					 textro ? true : false))
+    einfo ("%P%F: failed to set dynamic section sizes: %E\n");
+}
+
+/* Read an import or export file.  */
+
+static void
+gld${EMULATION_NAME}_read_file (filename, import)
+     const char *filename;
+     boolean import;
+{
+  struct obstack *o;
+  FILE *f;
+  int lineno;
+  int c;
+  boolean keep;
+  const char *imppath;
+  const char *impfile;
+  const char *impmember;
+
+  o = (struct obstack *) xmalloc (sizeof (struct obstack));
+  obstack_specify_allocation (o, 0, 0, xmalloc, gld${EMULATION_NAME}_free);
+
+  f = fopen (filename, "r");
+  if (f == NULL)
+    {
+      bfd_set_error (bfd_error_system_call);
+      einfo ("%F%s: %E\n", filename);
+    }
+
+  keep = false;
+
+  imppath = NULL;
+  impfile = NULL;
+  impmember = NULL;
+
+  lineno = 0;
+  while ((c = getc (f)) != EOF)
+    {
+      char *s;
+      char *symname;
+      boolean syscall;
+      bfd_vma address;
+      struct bfd_link_hash_entry *h;
+
+      if (c != '\n')
+	{
+	  obstack_1grow (o, c);
+	  continue;
+	}
+
+      obstack_1grow (o, '\0');
+      ++lineno;
+
+      s = (char *) obstack_base (o);
+      while (isspace ((unsigned char) *s))
+	++s;
+      if (*s == '\0'
+	  || *s == '*'
+	  || (*s == '#' && s[1] == ' ')
+	  || (! import && *s == '#' && s[1] == '!'))
+	{
+	  obstack_free (o, obstack_base (o));
+	  continue;
+	}
+
+      if (*s == '#' && s[1] == '!')
+	{
+	  s += 2;
+	  while (isspace ((unsigned char) *s))
+	    ++s;
+	  if (*s == '\0')
+	    {
+	      imppath = NULL;
+	      impfile = NULL;
+	      impmember = NULL;
+	      obstack_free (o, obstack_base (o));
+	    }
+	  else if (*s == '(')
+	    einfo ("%F%s%d: #! ([member]) is not supported in import files",
+		   filename, lineno);
+	  else
+	    {
+	      char cs;
+	      char *file;
+
+	      (void) obstack_finish (o);
+	      keep = true;
+	      imppath = s;
+	      impfile = NULL;
+	      while (! isspace ((unsigned char) *s) && *s != '(' && *s != '\0')
+		{
+		  if (*s == '/')
+		    file = s + 1;
+		  ++s;
+		}
+	      if (file != NULL)
+		{
+		  file[-1] = '\0';
+		  impfile = file;
+		  if (imppath == file - 1)
+		    imppath = "/";
+		}
+	      else
+		{
+		  impfile = imppath;
+		  imppath = "";
+		}
+	      cs = *s;
+	      *s = '\0';
+	      while (isspace ((unsigned char) cs))
+		{
+		  ++s;
+		  cs = *s;
+		}
+	      if (cs != '(')
+		{
+		  impmember = "";
+		  if (cs != '\0')
+		    einfo ("%s:%d: warning: syntax error in import file\n",
+			   filename, lineno);
+		}
+	      else
+		{
+		  ++s;
+		  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
diff --git a/ld/scripttempl/aix.sc b/ld/scripttempl/aix.sc
new file mode 100644
index 0000000..e901f7c
--- /dev/null
+++ b/ld/scripttempl/aix.sc
@@ -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