I have a 64bits ELF object code from the Tiny C compiler. I can't get gobjdump to show the disassembled code. I'm using OS X 10.10.5.
$ file hello.o
hello.o: ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped
$ gobjdump -d hello.o
gobjdump: hello.o: File format not recognized
$ greadelf -h hello.o
ELF Header:
Magic: 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00
Class: ELF64
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - System V
ABI Version: 0
Type: REL (Relocatable file)
Machine: Advanced Micro Devices X86-64
Version: 0x1
Entry point address: 0x0
Start of program headers: 0 (bytes into file)
Start of section headers: 228 (bytes into file)
Flags: 0x0
Size of this header: 64 (bytes)
Size of program headers: 0 (bytes)
Number of program headers: 0
Size of section headers: 64 (bytes)
Number of section headers: 7
Section header string table index: 6
Extra Information:
$uname -a
Darwin Nawals-MacBook-Air.local 14.5.0 Darwin Kernel Version 14.5.0:
Tue Sep 1 21:23:09 PDT 2015; root:xnu-2782.50.1~1/RELEASE_X86_64 x86_64
$ gobjdump -i
BFD header file version (GNU Binutils) 2.24
mach-o-x86-64
mach-o-i386
mach-o-le
mach-o-be
mach-o-fat
pef
pef-xlib
sym
srec
symbolsrec
verilog
tekhex
binary
ihex
I don't understand why stack overflow think my question is mostly code - I want to give as much information as possible to help people answer. I didn't think pastebin et al. were encouraged here.
the available output formats, per the man page are as follows:
-Wl,--oformat,fmt
Use fmt as output format. The supported output formats are:
"elf32-i386"
ELF output format (default)
"binary"
Binary image (only for executable output)
"coff"
COFF output format (only for executable output for TMS320C67xx
target)
So, regardless of the online claim that the x86-64 is supported, the latest version does not support x86-64 output for the object file