Apply patch from Richard Gorton <gorton@scrugs.lkg.dec.com> to implement

--emit-relocs switch to the linker to preserve relocs in an output executable

5 files changed, 32 insertions, 1 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index 38bebc7..5465848 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,12 @@
+2000-05-17 S. Bharadwaj Yadavalli  <sby@scrugs.lkg.dec.com>
+	      Rick Gorton	   <gorton@scrugs.lkg.dec.com>
+	      
+	Add support for '-q' == '--emit-relocs' switch.
+	* ldmain.c (main): Default to false.
+	* lexsup.c (parse_args): Turn on emitrelocations flag if set.
+	* NEWS: Describe the emitrelocations switch.
+	* ld.texinfo: Describe the emitrelocations switch.
+
 2000-05-16  Charles Wilson <cwilson@ece.gatech.edu>
 
 	* ld/emultempl/pe.em (_open_dynamic_archive): New function: Search
diff --git a/ld/NEWS b/ld/NEWS
index f78d4e5..325d8a8 100644
--- a/ld/NEWS
+++ b/ld/NEWS
@@ -2,6 +2,12 @@
 
 Changes in version 2.10:
 
+* Added ability to emit full relocation information in linked executables,
+  enabled by --emit-relocs.  Some post-linkage optimization tools need
+  this information in order to be able to correctly identify and perform
+  symbol relative addressing in the event of changes in section contents
+  (instructions being added or deleted, extending data sections, etc.)
+
 * Added AT> to the linker script language to allow load-time allocation of 
   sections into regions.
 
diff --git a/ld/ld.texinfo b/ld/ld.texinfo
index e8c11d9..1ff0ecb 100644
--- a/ld/ld.texinfo
+++ b/ld/ld.texinfo
@@ -588,6 +588,16 @@ If @var{level} is a numeric values greater than zero @code{ld} optimizes
 the output.  This might take significantly longer and therefore probably
 should only be enabled for the final binary.
 
+@kindex -q
+@kindex --emit-relocs
+@cindex retain relocations in final executable
+@item -q
+@itemx --emit-relocs
+Leave relocation sections and contents in fully linked exececutables.
+Post link analysis and optimization tools may need this information in
+order to perform correct modifications of executables.  This results
+in larger executables.
+
 @cindex partial link
 @cindex relocatable output
 @kindex -r
diff --git a/ld/ldmain.c b/ld/ldmain.c
index ba2a592..cfdbdd7 100644
--- a/ld/ldmain.c
+++ b/ld/ldmain.c
@@ -214,6 +214,7 @@ main (argc, argv)
 
   link_info.callbacks = &link_callbacks;
   link_info.relocateable = false;
+  link_info.emitrelocations = false;
   link_info.shared = false;
   link_info.symbolic = false;
   link_info.static_link = false;
@@ -1150,7 +1151,7 @@ undefined_symbol (info, name, abfd, section, address, fatal)
      bfd *abfd;
      asection *section;
      bfd_vma address;
-     boolean fatal;
+     boolean fatal ATTRIBUTE_UNUSED;
 {
   static char *error_name;
   static unsigned int error_count;
diff --git a/ld/lexsup.c b/ld/lexsup.c
index e2aac47..e09b58a 100644
--- a/ld/lexsup.c
+++ b/ld/lexsup.c
@@ -205,6 +205,8 @@ static const struct ld_option ld_options[] =
       '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
   { {"relocateable", no_argument, NULL, 'r'},
       'r', NULL, N_("Generate relocateable output"), TWO_DASHES },
+  { {"emit-relocs", no_argument, NULL, 'q'},
+      'q', NULL, "Generate relocations in final output", TWO_DASHES },
   { {NULL, no_argument, NULL, '\0'},
       'i', NULL, NULL, ONE_DASH },
   { {"just-symbols", required_argument, NULL, 'R'},
@@ -717,6 +719,9 @@ parse_args (argc, argv)
 	  lang_add_output_format (optarg, (char *) NULL, (char *) NULL, 0);
 	  break;
 	case 'i':
+	case 'q':
+	  link_info.emitrelocations = true;
+	  break;
 	case 'r':
 	  link_info.relocateable = true;
 	  config.build_constructors = false;