dwarf_getscope() fails on x86_64 arch

[Sharyathi Nagesh <sharyath at in dot ibm dot com>]

Hi
	I was testing one of my application written using libdw library 
provided by elfutils-0.141/elfutils-0.137 and it consistently hit error 
with dwarf_getscopes(). API returned -1 and dwarf_errmsg() returned 
(null). This problem was observed when the application is made to run 
over 64 bit vmlinux (with debug info) image, The function address are 64 
bit and of the format 0xffffffff800aa89f.
	Same code works fine with other non vmlinux executables, in which 
address is 32 bit, Same code works fine on ppc64 and on 64 bit vmlinux 
image on that machine.

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Ex:
	Pseudo code of what I was trying

#define Addr            0xffffffff800aa956 <== Hard Coded function pc

int main(int argc, char *argv[])
{
         fd = open_file(argv[1] /* Vmlinux Executable */);
         elf_descriptor = elf_begin(fd,  elf_cmd, (Elf *) 0);
         dbg = dwarf_begin_elf(elf_descriptor, dwarf_cmd, NULL);
         process_debug_information(dbg)
}

int process_debug_information(Dwarf *dbg, Dwarf_Addr *addr)
{
         Dwarf_Die result_cu;
         Dwarf_Die *cu_die;

         //Find the Required Compiler Unit
         cu_die = dwarf_addrdie(dbg,Addr,&result_cu);  <== PASS

	//Find the required Function Die
         nscopes = dwarf_getscopes(cu_die,addr, &scopes);  <== FAIL
		/* This	returns -1 and dwarf_errmsg() returns null */
	
}	

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If some can help me with this bug fixing it will be of great help

Thanks
Sharyathi Nagesh