commit e4d985a3c1c873f77d20fa0cd421458cc2824996

Author: Andreas Krebbel <krebbel@linux.ibm.com>

Date:   Thu Nov 19 20:32:24 2020 +0100

    IBM Z: Fix endianess problem in pid_memory_read

    The cached reads lack the big endian adjustments done in the fallback

    path.

    Signed-off-by: Andreas Krebbel <krebbel@linux.ibm.com>

diff --git a/libdwfl/linux-pid-attach.c b/libdwfl/linux-pid-attach.c

index 3a6af997..b23139d9 100644

--- a/libdwfl/linux-pid-attach.c

+++ b/libdwfl/linux-pid-attach.c

@@ -193,14 +193,22 @@ pid_memory_read (Dwfl *dwfl, Dwarf_Addr addr, Dwarf_Word *result, void *arg)

 {

   struct __libdwfl_pid_arg *pid_arg = arg;

   pid_t tid = pid_arg->tid_attached;

+  Dwfl_Process *process = dwfl->process;

   assert (tid > 0);

 #ifdef HAVE_PROCESS_VM_READV

   if (read_cached_memory (pid_arg, addr, result))

+    {

+#if SIZEOF_LONG == 8

+# if BYTE_ORDER == BIG_ENDIAN

+      if (ebl_get_elfclass (process->ebl) == ELFCLASS32)

+	*result >>= 32;

+# endif

+#endif

     return true;

+    }

 #endif

-  Dwfl_Process *process = dwfl->process;

   if (ebl_get_elfclass (process->ebl) == ELFCLASS64)

     {

 #if SIZEOF_LONG == 8