From: Tavis Ormandy <taviso@gmail.com>
To: binutils@sourceware.org
Subject: Re: making stabs visible to gdb
Date: Sat, 20 Aug 2022 04:49:14 -0000 (UTC) [thread overview]
Message-ID: <tdpp4a$14qv$1@ciao.gmane.io> (raw)
In-Reply-To: <tdpe90$u1n$1@ciao.gmane.io>
On 2022-08-20, Tavis Ormandy via Binutils wrote:
> On 2022-08-05, Tom Tromey wrote:
>>>> Also, is there a better way to accomplish what I'm trying to do?
>>
>> In the gdb test suite, we have some Tcl code that makes it relatively
>> simple to create synthetic DWARF. So, I'd consider extracting that and
>> using it to describe your program.
>>
>
> Hmm thanks, it kinda works - but it generates tons of warnings like
> this:
>
> warning: (Internal error: pc 0x8129250 in read in psymtab, but not in
> symtab.)
Nevermind, I figured it out - just making sure a matching section exists
that overlaps that region hides the warning.
This actually works really well, I made some gas macros to make the
syntax nice:
.include "symbols.s"
# bool rddec(char **numstr, uint16_t *num) @ 0x81dac90
function rddec, %bool, 0x81dac90
param numstr, ** %char
param num, * %uint16_t
It works perfectly:
(gdb) add-symbol-file symbols.dbg
(gdb) pt rddec
type = boolean (char **, unsigned short *)
(gdb) x/i rddec
0x81dac90 <rddec>: push ebp
(gdb) b rddec
Breakpoint 1 at 0x81dac96
(gdb) r
Even parameters work nicely:
Breakpoint 1, 0x081dac96 in rddec (numstr=0xffffc044, num=0x8350dbe)
(gdb) pt numstr
type = char **
(gdb) p *numstr
$1 = 0xffffc048 "06"
I'm really pleased with how this turned out, thanks for the hints!
Tavis.
--
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prev parent reply other threads:[~2022-08-20 4:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-03 5:11 Tavis Ormandy
2022-08-05 9:21 ` Nick Clifton
2022-08-05 14:50 ` Tom Tromey
2022-08-20 1:44 ` Tavis Ormandy
2022-08-20 4:49 ` Tavis Ormandy [this message]
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