Assume only FLAG_ELF_LIBC6 suport

The older libc versions are obsolete for over twenty years now.
This patch removes the special flags for libc5 and libc4 and assumes
that all libraries cached are libc6 compatible and use FLAG_ELF_LIBC6.

Checked with a build for all affected architectures.

Co-authored-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 6 insertions, 40 deletions

diff --git a/elf/readelflib.c b/elf/readelflib.c
index 771182b5d0..5f43e0230d 100644
--- a/elf/readelflib.c
+++ b/elf/readelflib.c
@@ -44,7 +44,6 @@ process_elf_file (const char *file_name, const char *lib, int *flag,
 		  size_t file_length)
 {
   int i;
-  unsigned int j;
   unsigned int dynamic_addr;
   size_t dynamic_size;
   char *program_interpreter;
@@ -81,9 +80,8 @@ process_elf_file (const char *file_name, const char *lib, int *flag,
   elf_pheader = (ElfW(Phdr) *) (elf_header->e_phoff + file_contents);
   check_ptr (elf_pheader);
 
-  /* The library is an elf library, now search for soname and
-     libc5/libc6.  */
-  *flag = FLAG_ELF;
+  /* The library is an elf library.  */
+  *flag = FLAG_ELF_LIBC6;
 
   /* The default ISA level is 0.  */
   *isa_level = 0;
@@ -110,16 +108,6 @@ process_elf_file (const char *file_name, const char *lib, int *flag,
 	  program_interpreter = (char *) (file_contents + segment->p_offset);
 	  check_ptr (program_interpreter);
 
-	  /* Check if this is enough to classify the binary.  */
-	  for (j = 0; j < sizeof (interpreters) / sizeof (interpreters [0]);
-	       ++j)
-	    if (strcmp (program_interpreter, interpreters[j].soname) == 0)
-	      {
-		*flag = interpreters[j].flag;
-		break;
-	      }
-	  break;
-
 	case PT_GNU_PROPERTY:
 	  /* The NT_GNU_PROPERTY_TYPE_0 note must be aligned to 4 bytes
 	     in 32-bit objects and to 8 bytes in 64-bit objects.  Skip
@@ -244,38 +232,16 @@ done:
   if (dynamic_strings == NULL)
     return 1;
 
-  /* Now read the DT_NEEDED and DT_SONAME entries.  */
+  /* Now read the DT_SONAME entries.  */
   for (dyn_entry = dynamic_segment; dyn_entry->d_tag != DT_NULL;
        ++dyn_entry)
     {
-      if (dyn_entry->d_tag == DT_NEEDED || dyn_entry->d_tag == DT_SONAME)
+      if (dyn_entry->d_tag == DT_SONAME)
 	{
 	  char *name = dynamic_strings + dyn_entry->d_un.d_val;
 	  check_ptr (name);
-
-	  if (dyn_entry->d_tag == DT_NEEDED)
-	    {
-
-	      if (*flag == FLAG_ELF)
-		{
-		  /* Check if this is enough to classify the binary.  */
-		  for (j = 0;
-		       j < sizeof (known_libs) / sizeof (known_libs [0]);
-		       ++j)
-		    if (strcmp (name, known_libs [j].soname) == 0)
-		      {
-			*flag = known_libs [j].flag;
-			break;
-		      }
-		}
-	    }
-
-	  else if (dyn_entry->d_tag == DT_SONAME)
-	    *soname = xstrdup (name);
-
-	  /* Do we have everything we need?  */
-	  if (*soname && *flag != FLAG_ELF)
-	    return 0;
+          *soname = xstrdup (name);
+          return 0;
 	}
     }