From: Richard M. Stallman <rms@gnu.org>
Date: Tue, 23 Aug 1994 21:35:23 +0000 (+0000)
Subject: (unexec): Don't alter the info field of SHT_SYMTAB and SHT_DYNSYM sections.
X-Git-Tag: emacs-19.34~7258
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=8917361f1ffd35abaa79e557bb20ca1b28ab6043;p=emacs.git

(unexec): Don't alter the info field of SHT_SYMTAB and SHT_DYNSYM sections.
---

diff --git a/src/unexelf.c b/src/unexelf.c
index a7f607e3de8..d1badcbda66 100644
--- a/src/unexelf.c
+++ b/src/unexelf.c
@@ -725,20 +725,23 @@ unexec (new_name, old_name, data_start, bss_start, entry_address)
       
       /* If any section hdr refers to the section after the new .data
 	 section, make it refer to next one because we have inserted 
-	 a new section in between. */
+	 a new section in between.  */
       
       PATCH_INDEX (NEW_SECTION_H (nn).sh_link);
-      PATCH_INDEX (NEW_SECTION_H (nn).sh_info);
-      
-      /* Now, start to copy the content of sections. */
+      /* For symbol tables, info is a symbol table index,
+	 so don't change it.  */
+      if (NEW_SECTION_H (nn).sh_type != SHT_SYMTAB
+	  && NEW_SECTION_H (nn).sh_type != SHT_DYNSYM)
+	PATCH_INDEX (NEW_SECTION_H (nn).sh_info);
+
+      /* Now, start to copy the content of sections.  */
       if (NEW_SECTION_H (nn).sh_type == SHT_NULL
 	  || NEW_SECTION_H (nn).sh_type == SHT_NOBITS)
 	continue;
       
       /* Write out the sections. .data and .data1 (and data2, called
-       * ".data" in the strings table) get copied from the current process
-       * instead of the old file.
-       */
+	 ".data" in the strings table) get copied from the current process
+	 instead of the old file.  */
       if (!strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data")
 	  || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
 		      ".data1"))
@@ -749,7 +752,7 @@ unexec (new_name, old_name, data_start, bss_start, entry_address)
       memcpy (NEW_SECTION_H (nn).sh_offset + new_base, src,
 	      NEW_SECTION_H (nn).sh_size);
 
-      /* If it is the symbol table, its st_shndx field needs to be patched. */
+      /* If it is the symbol table, its st_shndx field needs to be patched.  */
       if (NEW_SECTION_H (nn).sh_type == SHT_SYMTAB
 	  || NEW_SECTION_H (nn).sh_type == SHT_DYNSYM)
 	{
@@ -769,7 +772,7 @@ unexec (new_name, old_name, data_start, bss_start, entry_address)
 	}
     }
 
-  /* Update the symbol values of _edata and _end. */
+  /* Update the symbol values of _edata and _end.  */
   for (n = new_file_h->e_shnum - 1; n; n--)
     {
       byte *symnames;
@@ -789,7 +792,7 @@ unexec (new_name, old_name, data_start, bss_start, entry_address)
 	  memcpy (&symp->st_value, &new_bss_addr, sizeof (new_bss_addr));
     }
 
-  /* Close the files and make the new file executable */
+  /* Close the files and make the new file executable.  */
 
   if (close (old_file))
     fatal ("Can't close (%s): errno %d\n", old_name, errno);