From: Mark Mitchell <mark@codesourcery.com>
Date: Wed, 23 Jun 1999 11:09:30 +0000 (+0000)
Subject: 	* ldmain.c (main): Initialize link_info.init_function and
X-Git-Tag: gdb-1999-06-28~22
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3dbf70a2184b98af04dfec550fec9ae1a804bdb0;p=platform%2Fupstream%2Fbinutils.git

	* ldmain.c (main): Initialize link_info.init_function and
	link_info.fini_function.
	* lexsup.c (OPTION_INIT): New macro.
	(OPTION_FINI): Likewise.
	(ld_options): Add descriptions for them.
	(parse_args): Handle them.
---

diff --git a/ld/ChangeLog b/ld/ChangeLog
index 0c2bf7b..f6962ca 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,12 @@
+1999-06-22  Mark Mitchell  <mark@codesourcery.com>
+
+	* ldmain.c (main): Initialize link_info.init_function and
+	link_info.fini_function.
+	* lexsup.c (OPTION_INIT): New macro.
+	(OPTION_FINI): Likewise.
+	(ld_options): Add descriptions for them.
+	(parse_args): Handle them.
+
 1999-06-23  Ian Lance Taylor  <ian@zembu.com>
 
 	* ldlang.c (section_already_linked): Only discard link once
diff --git a/ld/ld.texinfo b/ld/ld.texinfo
index 73dc816..115f7a2 100644
--- a/ld/ld.texinfo
+++ b/ld/ld.texinfo
@@ -404,6 +404,14 @@ purpose: the @code{-b}, @code{--format}, @code{--oformat} options, the
 environment variable.  The @sc{gnu} linker will ignore the @code{-F}
 option when not creating an ELF shared object.
 
+@cindex finalization function
+@kindex -fini
+@item -fini @var{name}
+When creating an ELF executable or shared object, call NAME when the
+executable or shared object is unloaded, by setting DT_FINI to the
+address of the function.  By default, the linker uses @code{_fini} as
+the function to call.
+
 @kindex -g
 @item -g
 Ignored.  Provided for compatibility with other tools.
@@ -434,6 +442,14 @@ field rather than the using the file name given to the linker.
 @item -i
 Perform an incremental link (same as option @samp{-r}).
 
+@cindex initialization function
+@kindex -init
+@item -init @var{name}
+When creating an ELF executable or shared object, call NAME when the
+executable or shared object is loaded, by setting DT_INIT to the address
+of the function.  By default, the linker uses @code{_init} as the
+function to call.
+
 @cindex archive files, from cmd line
 @kindex -l@var{archive}
 @kindex --library=@var{archive}
diff --git a/ld/ldmain.c b/ld/ldmain.c
index 1e710db..7eef3e5 100644
--- a/ld/ldmain.c
+++ b/ld/ldmain.c
@@ -231,7 +231,11 @@ main (argc, argv)
   link_info.notice_hash = NULL;
   link_info.wrap_hash = NULL;
   link_info.mpc860c0 = 0;
-  
+  /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init
+     and _fini symbols.  We are compatible.  */
+  link_info.init_function = "_init";
+  link_info.fini_function = "_fini";
+
   ldfile_add_arch ("");
 
   config.make_executable = true;
diff --git a/ld/lexsup.c b/ld/lexsup.c
index a990693..8f4785b 100644
--- a/ld/lexsup.c
+++ b/ld/lexsup.c
@@ -120,6 +120,8 @@ int parsing_defsym = 0;
 #define OPTION_NO_CHECK_SECTIONS	(OPTION_CHECK_SECTIONS + 1)
 #define OPTION_MPC860C0                 (OPTION_NO_CHECK_SECTIONS + 1)
 #define OPTION_NO_UNDEFINED		(OPTION_MPC860C0 + 1)
+#define OPTION_INIT                     (OPTION_NO_UNDEFINED + 1)
+#define OPTION_FINI                     (OPTION_INIT + 1)
 
 /* The long options.  This structure is used for both the option
    parsing and the help text.  */
@@ -270,6 +272,8 @@ static const struct ld_option ld_options[] =
       '\0', N_("PROGRAM"), N_("Set the dynamic linker to use"), TWO_DASHES },
   { {"embedded-relocs", no_argument, NULL, OPTION_EMBEDDED_RELOCS},
       '\0', NULL, N_("Generate embedded relocs"), TWO_DASHES},
+  { {"fini", required_argument, NULL, OPTION_FINI},
+     '\0', N_("SYMBOL"), N_("Call SYMBOL at unload-time"), ONE_DASH },
   { {"force-exe-suffix", no_argument, NULL, OPTION_FORCE_EXE_SUFFIX},
       '\0', NULL, N_("Force generation of file with .exe suffix"), TWO_DASHES},
   { {"gc-sections", no_argument, NULL, OPTION_GC_SECTIONS},
@@ -280,6 +284,8 @@ static const struct ld_option ld_options[] =
       TWO_DASHES },
   { {"help", no_argument, NULL, OPTION_HELP},
       '\0', NULL, N_("Print option help"), TWO_DASHES },
+  { {"init", required_argument, NULL, OPTION_INIT},
+     '\0', N_("SYMBOL"), N_("Call SYMBOL at load-time"), ONE_DASH },
   { {"Map", required_argument, NULL, OPTION_MAP},
       '\0', N_("FILE"), N_("Write a map file"), ONE_DASH },
   { {"no-demangle", no_argument, NULL, OPTION_NO_DEMANGLE },
@@ -988,6 +994,14 @@ the GNU General Public License.  This program has absolutely no warranty.\n"));
             }
           command_line.relax = true;
           break;
+
+	case OPTION_INIT:
+	  link_info.init_function = optarg;
+	  break;
+	  
+	case OPTION_FINI:
+	  link_info.fini_function = optarg;
+	  break;
 	}
     }