Re: [Pgubook-readers] debug problem "with no line number"

[roger]

Here's a quick response.  I believe I reported on this bug earlier and
sent in a quick diff style patch for the book. ;-)

------------------------begin clipping-----------------------
Chapter 6. Reading and Writing Simple Records
p 97, Last Paragraph, Add/Modify to read "Let's look at our reading
function first (read-record.s)."

p 98, Last Paragraph, Add/Modify: "The writing one is similar and name
this write-record.s" or "The writing one is similar (write-record.s)."

When I got to p 104 during the exercises, I was stumped as to the
compiling procedures as I had no "write-record.s" and I thought it was a
typo... of which, there is also an actual typo within the procedures
itself putting me through more confusion.

--
p 104

To build the appliction, run the commands:

-- as write-records.s -o write-record.o
++ as write-records.s -o write-records.o

--

-------------------end clipping------------------------

(In other words, omit the "--" line and replace it with the "++" line in
the book.)



On Thu, 2004-11-18 at 18:32 +0800, harold wrote:
> hi,all
> I am a reader of pgubook.
> I encounted a problem when I read on the chapter 6.In
> the section "Writing records",there are
> two files:"write-records.s" and "write-record.s".
> I run the commands for debug later:
> as --gstabs write-records.s -o write-record.o
> as --gstabs write-record.s -o write-record.o
> ld write-records.o write-record.o -o write-records
> and ./write-records
> there is no error.but the problem is that I attempt to
> debug the program with gdb and emacs.
> when i typed this command:
> gdb write-records
> 
> below is the messages
> (gdb) break 64
> Breakpoint 1 at 0x8049467: file write-records.s, line
> 64.
> (gdb) run
> Starting program: /home/harold/asm/write-records
> 
> Breakpoint 1, 0x08049467 in _start ()
> (gdb) s
> Single stepping until exit from function _start,
> which has no line number information.
> write_record () at write-record.s:17
> 17        pushl %ebp
> Current language:  auto; currently asm
> 
> I don't understand this line "Single stepping until
> exit from function _start,
> which has no line number information."
> 
> other programs is ok.I can't find any errors.
> Can anybody help me!!!
> 
> 
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-- 

Roger
http://www.eskimo.com/~roger/index.html