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| From | Sergio Durigan Junior <sergiodj@riseup.net> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: inline functions |
| Date | 2012-12-05 15:34 -0200 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <87boe8mmgy.fsf@riseup.net> (permalink) |
| References | (4 earlier) <zN6ss.970994$it2.113406@fx22.am4> <871ufi7wl3.fsf@dpt-info.u-strasbg.fr> <50B1139C.1080501@loria.fr> <87hao1m5y2.fsf@riseup.net> <50BF1A99.7060708@loria.fr> |
On Wednesday, December 05 2012, Jens Gustedt wrote:
>> but can you provide an example?
>
>> You can use the various -d* (I'm thinking
>> about -dp here, actually) options on GCC to make it annotate the
>> assembler.
>
> -dp provides a very low level annotation of every assembler statement,
> usually not what *I* need to understand the assembler something like
Yeah, it is very low level indeed.
>> Don't know how clang annotates it, I don't have it installed
>> here.
>
> Clang (with just -S) annotates the same code more lightly but with
> higher level annotations corresponding to the structure of the source,
> here in particular the if-then-else constructs that generated the
> branching.
Ok, I see it.
You can achieve the same effect with GCC by compiling the program with
-g (debug information) and using `objdump -S' on the binary. It will
give you an output like:
00000000004004a9 <main>:
int
main ()
{
4004a9: 55 push %rbp
4004aa: 48 89 e5 mov %rsp,%rbp
4004ad: 48 83 ec 10 sub $0x10,%rsp
int a;
a = 10;
4004b1: c7 45 fc 0a 00 00 00 movl $0xa,-0x4(%rbp)
if (a < 20)
4004b8: 83 7d fc 13 cmpl $0x13,-0x4(%rbp)
4004bc: 7f 0c jg 4004ca <main+0x21>
foo ();
4004be: e8 d9 ff ff ff callq 40049c <foo>
else
return 0;
return 0;
4004c3: b8 00 00 00 00 mov $0x0,%eax
4004c8: eb 05 jmp 4004cf <main+0x26>
a = 10;
if (a < 20)
foo ();
else
return 0;
4004ca: b8 00 00 00 00 mov $0x0,%eax
return 0;
}
4004cf: c9 leaveq
4004d0: c3 retq
4004d1: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
4004d8: 00 00 00
4004db: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
Anyway, different ways to do it with different tools.
Regards,
--
Sergio
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inline functions "BartC" <bc@freeuk.com> - 2012-11-24 12:20 +0000
Re: inline functions SG <sgesemann@gmail.invalid> - 2012-11-24 14:52 +0100
Re: inline functions "BartC" <bc@freeuk.com> - 2012-11-24 14:48 +0000
Re: inline functions Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl> - 2012-11-24 15:59 +0100
Re: inline functions Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2012-11-24 16:25 +0100
Re: inline functions Johann Klammer <klammerj@NOSPAM.a1.net> - 2012-11-24 19:18 +0100
Re: inline functions Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-11-24 15:07 +0000
Re: inline functions "BartC" <bc@freeuk.com> - 2012-11-24 15:33 +0000
Re: inline functions Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2012-11-24 17:17 +0100
Re: inline functions "BartC" <bc@freeuk.com> - 2012-11-24 16:39 +0000
Re: inline functions Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2012-11-24 18:13 +0100
Re: inline functions Jens Gustedt <jens.gustedt@loria.fr> - 2012-11-24 19:36 +0100
Re: inline functions Sergio Durigan Junior <sergiodj@riseup.net> - 2012-12-05 03:19 -0200
Re: inline functions Jens Gustedt <jens.gustedt@loria.fr> - 2012-12-05 10:57 +0100
Re: inline functions Sergio Durigan Junior <sergiodj@riseup.net> - 2012-12-05 15:34 -0200
Re: inline functions Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-11-25 09:43 +0000
Re: inline functions Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2012-11-25 11:32 +0100
Re: inline functions Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-11-27 21:55 +0000
Re: inline functions "christian.bau" <christian.bau@cbau.wanadoo.co.uk> - 2012-11-26 04:16 -0800
Re: inline functions David Brown <david@westcontrol.removethisbit.com> - 2012-11-26 14:13 +0100
Re: inline functions Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-11-28 21:27 +0000
Re: inline functions James Kuyper <jameskuyper@verizon.net> - 2012-11-28 16:40 -0500
Re: inline functions Ben Pfaff <blp@cs.stanford.edu> - 2012-11-28 14:15 -0800
Re: inline functions Sergio Durigan Junior <sergiodj@riseup.net> - 2012-11-29 00:02 -0200
Re: inline functions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-11-29 07:24 -0800
Re: inline functions James Kuyper <jameskuyper@verizon.net> - 2012-11-29 11:04 -0500
Re: inline functions Sergio Durigan Junior <sergiodj@riseup.net> - 2012-11-29 14:44 -0200
Re: inline functions Les Cargill <lcargill99@comcast.com> - 2012-11-29 12:44 -0600
Re: inline functions Sergio Durigan Junior <sergiodj@riseup.net> - 2012-11-29 20:43 -0200
Re: inline functions Les Cargill <lcargill99@comcast.com> - 2012-11-29 20:14 -0600
Re: inline functions Ian Collins <ian-news@hotmail.com> - 2012-11-30 07:44 +1300
Re: inline functions Sergio Durigan Junior <sergiodj@riseup.net> - 2012-11-29 20:38 -0200
Re: inline functions Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-12-05 03:17 +0000
Re: inline functions Noob <root@127.0.0.1> - 2012-12-05 11:26 +0100
Re: inline functions David Brown <david@westcontrol.removethisbit.com> - 2012-11-26 11:23 +0100
Re: inline functions "BartC" <bc@freeuk.com> - 2012-11-26 13:01 +0000
Re: inline functions David Brown <david@westcontrol.removethisbit.com> - 2012-11-26 14:24 +0100
Re: inline functions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-11-26 05:35 -0800
Re: inline functions Les Cargill <lcargill99@comcast.com> - 2012-11-26 07:57 -0600
Re: inline functions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-11-26 07:07 -0800
Re: inline functions Rosario1903 <Rosario@invalid.invalid> - 2012-11-27 09:46 +0100
Re: inline functions David Brown <david@westcontrol.removethisbit.com> - 2012-11-27 10:50 +0100
Re: inline functions "BartC" <bc@freeuk.com> - 2012-11-26 14:14 +0000
Re: inline functions "BartC" <bc@freeuk.com> - 2012-11-26 15:14 +0000
Re: inline functions Rosario1903 <Rosario@invalid.invalid> - 2012-11-27 09:46 +0100
Re: inline functions "BartC" <bc@freeuk.com> - 2012-11-27 14:41 +0000
Re: inline functions David Brown <david@westcontrol.removethisbit.com> - 2012-11-27 11:01 +0100
Re: inline functions "BartC" <bc@freeuk.com> - 2012-11-27 14:37 +0000
Re: inline functions Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2012-11-27 18:22 +0100
Re: inline functions James Kuyper <jameskuyper@verizon.net> - 2012-11-27 12:55 -0500
Re: inline functions Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-11-27 22:06 +0000
Re: inline functions David Brown <david@westcontrol.removethisbit.com> - 2012-11-29 09:47 +0100
Re: inline functions glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-11-26 14:39 +0000
Re: inline functions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-11-24 07:20 -0800
Re: inline functions James Kuyper <jameskuyper@verizon.net> - 2012-11-24 10:44 -0500
Re: inline functions James Kuyper <jameskuyper@verizon.net> - 2012-11-24 10:35 -0500
Re: inline functions Philip Lantz <prl@canterey.us> - 2012-11-24 22:56 -0800
Re: inline functions James Dow Allen <jdallen2000@yahoo.com> - 2012-11-25 01:18 -0800
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