From: Ulrich Drepper <drepper@redhat.com>
Date: Fri, 7 May 1999 00:00:48 +0000 (+0000)
Subject: Update.
X-Git-Tag: cvs/glibc-2_1_1~53
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7bcaca4384ad7234926730e9e2d90dae67d521bb;p=platform%2Fupstream%2Fglibc.git

Update.

	* elf/link.h (struct link_map): New field l_phdr_allocated.
	* elf/dl-load.c (_dl_map_object_from_fd): Don't depend on having
	the program header being part of any loaded segment.  If it is not
	allocate memory and set l_phdr_allocated flag.
	* elf/dl-close.c (_dl_close): Free l_phdr if necessary.
---

diff --git a/ChangeLog b/ChangeLog
index 59400bf..06de3f1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 1999-05-06  Ulrich Drepper  <drepper@cygnus.com>
 
+	* elf/link.h (struct link_map): New field l_phdr_allocated.
+	* elf/dl-load.c (_dl_map_object_from_fd): Don't depend on having
+	the program header being part of any loaded segment.  If it is not
+	allocate memory and set l_phdr_allocated flag.
+	* elf/dl-close.c (_dl_close): Free l_phdr if necessary.
+
 	* nss/digits_dots.c: Correct return value interpretation of
 	inet_ntoa.  Fix PR libc/1109.
 
diff --git a/elf/dl-close.c b/elf/dl-close.c
index d7a61c4..6846f83 100644
--- a/elf/dl-close.c
+++ b/elf/dl-close.c
@@ -165,6 +165,9 @@ _dl_close (struct link_map *map)
 	  if (imap != map && imap->l_searchlist.r_list != NULL)
 	    free (imap->l_searchlist.r_list);
 
+	  if (imap->l_phdr_allocated)
+	    free (imap->l_phdr);
+
 	  free (imap);
 	}
     }
diff --git a/elf/dl-load.c b/elf/dl-load.c
index 6e8b977..5ed5128 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -917,6 +917,13 @@ _dl_map_object_from_fd (const char *name, int fd, char *realname,
 		       c->prot, MAP_FIXED, c->mapoff);
 
       postmap:
+	if (l->l_phdr == 0
+	    && c->mapoff <= header->e_phoff
+	    && (c->mapend - c->mapstart + c->mapoff
+		>= header->e_phoff + header->e_phnum * sizeof (ElfW(Phdr))))
+	  /* Found the program header in this segment.  */
+	  l->l_phdr = (void *) (c->mapstart + header->e_phoff - c->mapoff);
+
 	if (c->allocend > c->dataend)
 	  {
 	    /* Extra zero pages should appear at the end of this segment,
@@ -963,22 +970,19 @@ _dl_map_object_from_fd (const char *name, int fd, char *realname,
 	++c;
       }
 
-    if (l->l_phdr == 0)
+    if (l->l_phdr == NULL)
       {
-	/* There was no PT_PHDR specified.  We need to find the phdr in the
-           load image ourselves.  We assume it is in fact in the load image
-           somewhere.  */
-	for (c = loadcmds; c < &loadcmds[nloadcmds]; c++)
-	  if (c->mapoff <= header->e_phoff
-	      && (c->mapend - c->mapstart + c->mapoff
-		  >= header->e_phoff + header->e_phnum * sizeof (ElfW(Phdr))))
-	    {
-	      ElfW(Addr) bof = l->l_addr + c->mapstart;
-	      l->l_phdr = (void *) (bof + header->e_phoff - c->mapoff);
-	      break;
-	    }
-	if (l->l_phdr == 0)
-	  LOSE (0, "program headers not contained in any loaded segment");
+	/* The program header is not contained in any of the segmenst.
+	   We have to allocate memory ourself and copy it over from
+	   out temporary place.  */
+	ElfW(Phdr) *newp = (ElfW(Phdr) *) malloc (header->e_phnum
+						  * sizeof (ElfW(Phdr)));
+	if (newp == NULL)
+	  LOSE (ENOMEM, "cannot allocate memory for program header");
+
+	l->l_phdr = memcpy (newp, phdr,
+			    (header->e_phnum * sizeof (ElfW(Phdr))));
+	l->l_phdr_allocated = 1;
       }
     else
       /* Adjust the PT_PHDR value by the runtime load address.  */
diff --git a/elf/link.h b/elf/link.h
index 4abcb49..5e9d7a8 100644
--- a/elf/link.h
+++ b/elf/link.h
@@ -199,6 +199,9 @@ struct link_map
        object is the same as one already loaded.  */
     dev_t l_dev;
     ino_t l_ino;
+
+    /* Nonzero if the data structure pointed to by `l_phdr' is allocated.  */
+    int l_phdr_allocated;
   };
 
 #endif /* link.h */