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Date: Sun, 24 Jan 2021 17:35:21 +0200
Message-Id: <835z3m4abq.fsf@gnu.org>
To: Peng Yu <pengyu.ut@gmail.com>
In-Reply-To: <CABrM6wnr7vSR-HFxUGU+6wF9x-vBMNzOYhQi5EUHRpkGj_MBmA@mail.gmail.com>
 (message from Peng Yu via Gdb on Sun, 24 Jan 2021 09:06:10 -0600)
Subject: Re: Why does `disassemble` behave differently on Linux and Mac?
References: <CABrM6wnr7vSR-HFxUGU+6wF9x-vBMNzOYhQi5EUHRpkGj_MBmA@mail.gmail.com>
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From: Eli Zaretskii via Gdb <gdb@sourceware.org>
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> Date: Sun, 24 Jan 2021 09:06:10 -0600
> From: Peng Yu via Gdb <gdb@sourceware.org>
> 
> $ gcc -c func.c
> $ gdb -q func.o
> Reading symbols from func.o...
> (No debugging symbols found in func.o)
> (gdb) show disassembly-flavor
> The disassembly flavor is "att".
> (gdb) disassemble func
> No symbol table is loaded.  Use the "file" command.

I think you need to compile with -g.