From ea03559a9d4730f89105b6f5e674a0aaefc74b3b Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Wed, 27 Sep 1995 06:49:48 +0000
Subject: Wed Sep 27 00:27:25 1995  Roland McGrath 
 <roland@churchy.gnu.ai.mit.edu>

	* config.make.in (AS): New variable; set to `$(CC) -c'.

	* posix/unistd.h [__USE_BSD]: Declare profil.

	* elf/dl-load.c (_dl_map_object_from_fd): New function, broken out
	of _dl_map_object.
	(_dl_map_object): Call it.
	* elf/link.h (_dl_map_object_from_fd): Declare it.
---
 elf/dl-load.c | 83 ++++++++++++++++++++++++++++++++++-------------------------
 elf/link.h    |  6 +++++
 2 files changed, 54 insertions(+), 35 deletions(-)

(limited to 'elf')

diff --git a/elf/dl-load.c b/elf/dl-load.c
index 6cacd3e..7319602 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -108,40 +108,8 @@ _dl_map_object (struct link_map *loader, const char *name,
 		Elf32_Addr *entry_point)
 {
   int fd;
-  struct link_map *l = NULL;
   char *realname;
-  const size_t pagesize = getpagesize ();
-  void *file_mapping = NULL;
-  size_t mapping_size = 0;
-
-  void lose (int code, const char *msg)
-    {
-      (void) close (fd);
-      if (file_mapping)
-	munmap (file_mapping, mapping_size);
-      _dl_signal_error (code, l ? l->l_name : name, msg);
-    }
-
-  /* Make sure LOCATION is mapped in.  */
-  void *map (off_t location, size_t size)
-    {
-      if ((off_t) mapping_size <= location + (off_t) size)
-	{
-	  void *result;
-	  if (file_mapping)
-	    munmap (file_mapping, mapping_size);
-	  mapping_size = (location + size + 1 + pagesize - 1);
-	  mapping_size &= ~(pagesize - 1);
-	  result = mmap (file_mapping, mapping_size, PROT_READ,
-			 MAP_COPY|MAP_FILE, fd, 0);
-	  if (result == (void *) -1)
-	    lose (errno, "cannot map file data");
-	  file_mapping = result;
-	}
-      return file_mapping + location;
-    }
-
-  const Elf32_Ehdr *header;
+  struct link_map *l;
 
   /* Look for this name among those already loaded.  */
   for (l = _dl_loaded; l; l = l->l_next)
@@ -182,7 +150,52 @@ _dl_map_object (struct link_map *loader, const char *name,
     }
 
   if (fd == -1)
-    lose (errno, "cannot open shared object file");
+    _dl_signal_error (errno, name, "cannot open shared object file");
+
+  return _dl_map_object_from_fd (name, fd, realname, entry_point);
+}
+
+
+/* Map in the shared object NAME, actually located in REALNAME, and already
+   opened on FD.  */
+
+struct link_map *
+_dl_map_object_from_fd (const char *name, int fd, char *realname, 
+			Elf32_Addr *entry_point)
+{
+  struct link_map *l = NULL;
+  const size_t pagesize = getpagesize ();
+  void *file_mapping = NULL;
+  size_t mapping_size = 0;
+
+  void lose (int code, const char *msg)
+    {
+      (void) close (fd);
+      if (file_mapping)
+	munmap (file_mapping, mapping_size);
+      _dl_signal_error (code, l ? l->l_name : name, msg);
+    }
+
+  /* Make sure LOCATION is mapped in.  */
+  void *map (off_t location, size_t size)
+    {
+      if ((off_t) mapping_size <= location + (off_t) size)
+	{
+	  void *result;
+	  if (file_mapping)
+	    munmap (file_mapping, mapping_size);
+	  mapping_size = (location + size + 1 + pagesize - 1);
+	  mapping_size &= ~(pagesize - 1);
+	  result = mmap (file_mapping, mapping_size, PROT_READ,
+			 MAP_COPY|MAP_FILE, fd, 0);
+	  if (result == (void *) -1)
+	    lose (errno, "cannot map file data");
+	  file_mapping = result;
+	}
+      return file_mapping + location;
+    }
+
+  const Elf32_Ehdr *header;
 
   /* Look again to see if the real name matched another already loaded.  */
   for (l = _dl_loaded; l; l = l->l_next)
@@ -191,11 +204,11 @@ _dl_map_object (struct link_map *loader, const char *name,
 	/* The object is already loaded.
 	   Just bump its reference count and return it.  */
 	close (fd);
+	free (realname);
 	++l->l_opencount;
 	return l;
       }
 
-
   /* Map in the first page to read the header.  */
   header = map (0, sizeof *header);
 
diff --git a/elf/link.h b/elf/link.h
index 6f44a0c..aacb3f1 100644
--- a/elf/link.h
+++ b/elf/link.h
@@ -164,6 +164,12 @@ extern struct link_map *_dl_map_object (struct link_map *loader,
 					const char *name,
 					Elf32_Addr *entry_point);
 
+/* Similar, but file found at REALNAME and opened on FD.
+   REALNAME must malloc'd storage and is used in internal data structures.  */
+extern struct link_map *_dl_map_object_from_fd (const char *name,
+						int fd, char *realname,
+						Elf32_Addr *entry_point);
+
 /* Cache the locations of MAP's hash table.  */
 extern void _dl_setup_hash (struct link_map *map);
 
-- 
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