commit e8b9832af19e5975fb2a9dbe729eaba0373c781f
Author: Mark Wielaard <mark@klomp.org>
Date:   Mon Dec 3 00:03:39 2018 +0100

    libebl: Fix reading GNU_PROPERTY_STACK_SIZE reading from 32bit notes.
    
    When reading a GNU_PROPERTY_STACK_SIZE we need to use the proper data
    type. GElf_Addr is 64bit always and when reading a 32bit size part of
    it would not be initialized. Use either Elf32_Addr or Elf64_Addr to
    read and print the data.
    
    Add 32bit and 64bit, little and big endian testcases.
    
    Signed-off-by: Mark Wielaard <mark@klomp.org>

diff --git a/libebl/eblobjnote.c b/libebl/eblobjnote.c
index 58ac86d..c19ea37 100644
--- a/libebl/eblobjnote.c
+++ b/libebl/eblobjnote.c
@@ -360,15 +360,22 @@ ebl_object_note (Ebl *ebl, uint32_t namesz, const char *name, uint32_t type,
 		  if (prop.pr_type == GNU_PROPERTY_STACK_SIZE)
 		    {
 		      printf ("STACK_SIZE ");
-		      if (prop.pr_datasz == 4 || prop.pr_datasz == 8)
+		      union
+			{
+			  Elf64_Addr a64;
+			  Elf32_Addr a32;
+			} addr;
+		      if ((elfclass == ELFCLASS32 && prop.pr_datasz == 4)
+			  || (elfclass == ELFCLASS64 && prop.pr_datasz == 8))
 			{
-			  GElf_Addr addr;
 			  in.d_type = ELF_T_ADDR;
 			  out.d_type = ELF_T_ADDR;
 			  in.d_size = prop.pr_datasz;
-			  out.d_size = sizeof (addr);
+			  out.d_size = prop.pr_datasz;
 			  in.d_buf = (void *) desc;
-			  out.d_buf = (void *) &addr;
+			  out.d_buf = (elfclass == ELFCLASS32
+				       ? (void *) &addr.a32
+				       : (void *) &addr.a64);
 
 			  if (gelf_xlatetom (ebl->elf, &out, &in,
 					     elfident[EI_DATA]) == NULL)
@@ -376,7 +383,10 @@ ebl_object_note (Ebl *ebl, uint32_t namesz, const char *name, uint32_t type,
 			      printf ("%s\n", elf_errmsg (-1));
 			      return;
 			    }
-			  printf ("%#" PRIx64 "\n", addr);
+			  if (elfclass == ELFCLASS32)
+			    printf ("%#" PRIx32 "\n", addr.a32);
+			  else
+			    printf ("%#" PRIx64 "\n", addr.a64);
 			}
 		      else
 			printf (" (garbage datasz: %" PRIx32 ")\n",