19990502 sourceware importbinu_ss_19990502

1 files changed, 283 insertions, 0 deletions

diff --git a/ld/emultempl/hppaelf.em b/ld/emultempl/hppaelf.em
new file mode 100644
index 0000000..c0ca113
--- /dev/null
+++ b/ld/emultempl/hppaelf.em
@@ -0,0 +1,283 @@
+# This shell script emits a C file. -*- C -*-
+# It does some substitutions.
+cat >e${EMULATION_NAME}.c <<EOF
+/* An emulation for HP PA-RISC ELF linkers.
+   Copyright (C) 1991, 93, 94, 95, 1997 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 "bfdlink.h"
+
+#include "ld.h"
+#include "ldemul.h"
+#include "ldfile.h"
+#include "ldexp.h"
+#include "ldlang.h"
+#include "ldmisc.h"
+#include "ldmain.h"
+#include "ldctor.h"
+
+/* Section in which we build stubs.  */
+static asection *stub_sec;
+static lang_input_statement_type *stub_file;
+
+
+/* FIXME.  This doesn't belong here.  */
+extern lang_statement_list_type file_chain;
+
+/* 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()
+{
+  unsigned long machine = 0;
+
+  bfd_set_arch_mach (output_bfd, ldfile_output_architecture, machine);
+}
+
+/* This is called before the input files are opened.  We create a new
+   fake input file to hold the stub section.  */
+
+static void
+hppaelf_create_output_section_statements ()
+{
+  stub_file = lang_add_input_file ("linker stubs",
+				   lang_input_file_is_fake_enum,
+				   NULL);
+  stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
+  if (stub_file->the_bfd == NULL
+      || ! bfd_set_arch_mach (stub_file->the_bfd,
+			      bfd_get_arch (output_bfd),
+			      bfd_get_mach (output_bfd)))
+    {
+      einfo ("%X%P: can not create BFD %E\n");
+      return;
+    }
+
+  stub_sec = bfd_make_section_old_way (stub_file->the_bfd, ".text");
+  /* Don't set SEC_RELOC until we actually have relocations in this
+     section.  */
+  if (stub_sec == NULL
+      || ! bfd_set_section_flags (stub_file->the_bfd, stub_sec,
+				  (SEC_HAS_CONTENTS
+				   | SEC_ALLOC
+				   | SEC_LOAD
+				   | SEC_CODE
+				   | SEC_IN_MEMORY)))
+    {
+      einfo ("%X%P: can not create stub section: %E\n");
+      return;
+    }
+
+  ldlang_add_file (stub_file);
+}
+
+/* Walk all the lang statements splicing out any padding statements from 
+   the list.  */
+
+static void
+hppaelf_delete_padding_statements (s, prev)
+     lang_statement_union_type *s;
+     lang_statement_union_type **prev;
+{
+  lang_statement_union_type *sprev = NULL;
+  for (; s != NULL; s = s->next)
+    {
+      switch (s->header.type)
+	{
+
+	/* We want recursively walk these sections.  */
+	case lang_constructors_statement_enum:
+	  hppaelf_delete_padding_statements (constructor_list.head,
+					     &constructor_list.head);
+	  break;
+
+	case lang_output_section_statement_enum:
+	  hppaelf_delete_padding_statements (s->output_section_statement.
+					       children.head,
+					     &s->output_section_statement.
+					       children.head);
+	  break;
+
+	/* Huh?  What is a lang_wild_statement?  */
+	case lang_wild_statement_enum:
+	  hppaelf_delete_padding_statements (s->wild_statement.
+					       children.head,
+					     &s->wild_statement.
+					       children.head);
+	  break;
+
+	/* Here's what we are really looking for.  Splice these out of
+	   the list.  */
+	case lang_padding_statement_enum:
+	  if (sprev)
+	    sprev->header.next = s->header.next;
+	  else
+	    **prev = *s;
+	  break;
+
+	/* We don't care about these cases.  */
+	case lang_data_statement_enum:
+	case lang_object_symbols_statement_enum:
+	case lang_output_statement_enum:
+	case lang_target_statement_enum:
+	case lang_input_section_enum:
+	case lang_input_statement_enum:
+	case lang_assignment_statement_enum:
+	case lang_address_statement_enum:
+	  break;
+
+	default:
+	  abort ();
+	  break;
+	}
+      sprev = s;
+    }
+}
+
+/* Final emulation specific call.  For the PA we use this opportunity
+   to build linker stubs.  */
+
+static void
+hppaelf_finish ()
+{
+  /* Call into the BFD backend to do the real work.  */
+  if (elf32_hppa_size_stubs (stub_file->the_bfd, output_bfd, &link_info)
+      == false)
+    {
+      einfo ("%X%P: can not size stub section: %E\n");
+      return;
+    }
+  
+  /* If the size of the stub section is nonzero, then we need
+     to resize the sections, recompute the assignments, and finally
+     build the stubs.  */
+  if (bfd_section_size (stub_file->the_bfd, stub_file->the_bfd->sections) != 0)
+    {
+      /* Delete all the padding statements, they're no longer valid.  */
+      hppaelf_delete_padding_statements (stat_ptr->head, &stat_ptr->head);
+      
+      /* Resize the sections.  */
+      lang_size_sections (stat_ptr->head, abs_output_section,
+			  &stat_ptr->head, 0, (bfd_vma) 0, false);
+      
+      /* Redo special stuff.  */
+      ldemul_after_allocation ();
+      
+      /* Do the assignments again.  */
+      lang_do_assignments (stat_ptr->head,
+			   abs_output_section,
+			   (fill_type) 0, (bfd_vma) 0);
+      
+      /* Now build the linker stubs.  */
+      if (elf32_hppa_build_stubs (stub_file->the_bfd, &link_info) == false)
+	{
+	  einfo ("%X%P: can not build stubs: %E\n");
+	  return;
+	}
+    }
+}
+
+/* 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='s/["\\]/\\&/g
+s/$/\\n\\/
+1s/^/"/
+$s/$/n"/
+'
+
+cat >>e${EMULATION_NAME}.c <<EOF
+{			     
+  *isfile = 0;
+
+  if (link_info.relocateable == true && config.build_constructors == true)
+    return `sed "$sc" ldscripts/${EMULATION_NAME}.xu`;
+  else if (link_info.relocateable == true)
+    return `sed "$sc" ldscripts/${EMULATION_NAME}.xr`;
+  else if (!config.text_read_only)
+    return `sed "$sc" ldscripts/${EMULATION_NAME}.xbn`;
+  else if (!config.magic_demand_paged)
+    return `sed "$sc" ldscripts/${EMULATION_NAME}.xn`;
+  else
+    return `sed "$sc" ldscripts/${EMULATION_NAME}.x`;
+}
+EOF
+
+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_hppaelf_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,
+  "hppaelf",
+  "elf32-hppa",
+  hppaelf_finish,
+  hppaelf_create_output_section_statements,
+};
+EOF