gdb debugging assembly with no symbols

Four · 08-07-2008, 10:17 PM

Hi,

I'm debugging a program that doesn't have any symbols. Is it posible to get gdb to print out the assembly instructions that its going to execute? all it tells me is

<address> ??()

Thank you

Steve K. · 08-08-2008, 09:35 AM

I use KDevelop as my IDE. When debugging in KDevelop a tab labeled Disassemble is available to see assembly code for the program being debugged. I haven't used it, so I can say nothing beyond its existence.

vladmihaisima · 08-08-2008, 11:36 AM

You can use command "disassemble". If you want details you type "help disassemble".

Using gdb from Kdevelop would be much easiear, if possible install KDevelop.

paulsm4 · 08-08-2008, 01:13 PM

"help disassemble" is the ticket.

Here's a good tutorial:
http://www.unknownroad.com/rtfm/gdbtut/gdbadvanced.html

Four · 08-15-2008, 09:11 PM

Is it possible to have gdb print out the assembly instruction to be executed after I type something like stepi or nexti. Its really annoying to type "disassemble $pc ($pc+1)" to get the current instruction.

Basicly I'm looking at a compiled executable and trying to understand how it works. I do not have the source code for the executable.

Thank you

shana · 10-01-2008, 08:47 PM

display/i $pc

This makes gdb display the next instruction to execute everytime you stop.