CODEWITHSUNDEEP
assembly
RKum
RKum

Reputation: 831

Is the syntax of assembly instructions processor dependent?

I am running a 32 bit C application on 64 bit SUSE Linux. I just disassembled one of its function in gdb and I see the below assembly at function start i.e. function prologue:

0x08048c0e <+0>:     push   %ebp
0x08048c0f <+1>:     mov    %esp,%ebp

Assembly instruction mov instruction syntax I guess is:

mov <Destination>, <Source>

But seeing the assembly code above this seems changed to 

mov <Source>, <Destination>

Is the syntax of assembly instructions processor dependent?

Upvotes: 0

Views: 80

Answers (1)

David Hoelzer
David Hoelzer

Reputation: 16331

What you describe as your expectation is known generally as "Intel" syntax while your disassembly i being displayed in AT&T format.

If you are using GDB, you can execute a set disassembly-flavor intel command to change it over. In fact, you can even put this into a .gdbinit file in the local directory where you are debugging or, if you want it more generally configured, in your home directory. It will then be set automatically.

Upvotes: 1

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