* dlinfo @ 2013-06-29 15:40 Justin Cormack 2013-06-29 15:53 ` dlinfo Rich Felker 0 siblings, 1 reply; 9+ messages in thread From: Justin Cormack @ 2013-06-29 15:40 UTC (permalink / raw) To: musl [-- Attachment #1: Type: text/plain, Size: 54 bytes --] Has anyone got any plans to implement dlinfo? Justin [-- Attachment #2: Type: text/html, Size: 92 bytes --] ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: dlinfo 2013-06-29 15:40 dlinfo Justin Cormack @ 2013-06-29 15:53 ` Rich Felker 2013-06-29 16:14 ` dlinfo Justin Cormack 0 siblings, 1 reply; 9+ messages in thread From: Rich Felker @ 2013-06-29 15:53 UTC (permalink / raw) To: musl On Sat, Jun 29, 2013 at 04:40:17PM +0100, Justin Cormack wrote: > Has anyone got any plans to implement dlinfo? I'm not opposed to it, but not sure how easy it would be. RTLD_DI_LINKMAP looks trivial (just return the argument passed in), but the origin and search information is stuff that's probably not saved with the current dynamic linker implementation. Rich ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: dlinfo 2013-06-29 15:53 ` dlinfo Rich Felker @ 2013-06-29 16:14 ` Justin Cormack 2013-06-29 16:31 ` dlinfo Rich Felker 0 siblings, 1 reply; 9+ messages in thread From: Justin Cormack @ 2013-06-29 16:14 UTC (permalink / raw) To: musl [-- Attachment #1: Type: text/plain, Size: 581 bytes --] On 29 Jun 2013 16:54, "Rich Felker" <dalias@aerifal.cx> wrote: > > On Sat, Jun 29, 2013 at 04:40:17PM +0100, Justin Cormack wrote: > > Has anyone got any plans to implement dlinfo? > > I'm not opposed to it, but not sure how easy it would be. > RTLD_DI_LINKMAP looks trivial (just return the argument passed in), > but the origin and search information is stuff that's probably not > saved with the current dynamic linker implementation. Linkmap is the only bit I need actually. NetBSD apparently only implements that and not the rest, so it is not unprecedented. > Rich Justin [-- Attachment #2: Type: text/html, Size: 781 bytes --] ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: dlinfo 2013-06-29 16:14 ` dlinfo Justin Cormack @ 2013-06-29 16:31 ` Rich Felker 2013-06-29 16:34 ` dlinfo Justin Cormack 0 siblings, 1 reply; 9+ messages in thread From: Rich Felker @ 2013-06-29 16:31 UTC (permalink / raw) To: musl On Sat, Jun 29, 2013 at 05:14:16PM +0100, Justin Cormack wrote: > On 29 Jun 2013 16:54, "Rich Felker" <dalias@aerifal.cx> wrote: > > > > On Sat, Jun 29, 2013 at 04:40:17PM +0100, Justin Cormack wrote: > > > Has anyone got any plans to implement dlinfo? > > > > I'm not opposed to it, but not sure how easy it would be. > > RTLD_DI_LINKMAP looks trivial (just return the argument passed in), > > but the origin and search information is stuff that's probably not > > saved with the current dynamic linker implementation. > > Linkmap is the only bit I need actually. NetBSD apparently only implements > that and not the rest, so it is not unprecedented. As a quick workaround then: -D'dlinfo(x,y,z)=(*(struct link_map *)(z) = (void *)(x))' Kidding aside, I wouldn't actually recommend this, since you'd be encoding implementation internals (the fact that the dso handle is actually the link_map pointer) into the application, which could badly break if the implementation is ever changed. I'll just go ahead and add this limited version of dlinfo; look for it soon and ping me if you don't see it. Rich ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: dlinfo 2013-06-29 16:31 ` dlinfo Rich Felker @ 2013-06-29 16:34 ` Justin Cormack 2013-06-29 16:39 ` dlinfo Rich Felker 0 siblings, 1 reply; 9+ messages in thread From: Justin Cormack @ 2013-06-29 16:34 UTC (permalink / raw) To: musl [-- Attachment #1: Type: text/plain, Size: 1227 bytes --] On 29 Jun 2013 17:31, "Rich Felker" <dalias@aerifal.cx> wrote: > > On Sat, Jun 29, 2013 at 05:14:16PM +0100, Justin Cormack wrote: > > On 29 Jun 2013 16:54, "Rich Felker" <dalias@aerifal.cx> wrote: > > > > > > On Sat, Jun 29, 2013 at 04:40:17PM +0100, Justin Cormack wrote: > > > > Has anyone got any plans to implement dlinfo? > > > > > > I'm not opposed to it, but not sure how easy it would be. > > > RTLD_DI_LINKMAP looks trivial (just return the argument passed in), > > > but the origin and search information is stuff that's probably not > > > saved with the current dynamic linker implementation. > > > > Linkmap is the only bit I need actually. NetBSD apparently only implements > > that and not the rest, so it is not unprecedented. > > As a quick workaround then: > > -D'dlinfo(x,y,z)=(*(struct link_map *)(z) = (void *)(x))' > > Kidding aside, I wouldn't actually recommend this, since you'd be > encoding implementation internals (the fact that the dso handle is > actually the link_map pointer) into the application, which could badly > break if the implementation is ever changed. I'll just go ahead and > add this limited version of dlinfo; look for it soon and ping me if > you don't see it. > > Rich Thanks! [-- Attachment #2: Type: text/html, Size: 1659 bytes --] ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: dlinfo 2013-06-29 16:34 ` dlinfo Justin Cormack @ 2013-06-29 16:39 ` Rich Felker 2013-06-29 16:43 ` dlinfo Justin Cormack 0 siblings, 1 reply; 9+ messages in thread From: Rich Felker @ 2013-06-29 16:39 UTC (permalink / raw) To: musl On Sat, Jun 29, 2013 at 05:34:46PM +0100, Justin Cormack wrote: > > As a quick workaround then: > > > > -D'dlinfo(x,y,z)=(*(struct link_map *)(z) = (void *)(x))' > > > > Kidding aside, I wouldn't actually recommend this, since you'd be > > encoding implementation internals (the fact that the dso handle is > > actually the link_map pointer) into the application, which could badly > > break if the implementation is ever changed. I'll just go ahead and > > add this limited version of dlinfo; look for it soon and ping me if > > you don't see it. > > Thanks! One more question: does RTLD_SELF need to work? That's a lot harder and uglier, as it requires extra asm for each arch... Rich ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: dlinfo 2013-06-29 16:39 ` dlinfo Rich Felker @ 2013-06-29 16:43 ` Justin Cormack 2013-06-29 16:48 ` dlinfo Rich Felker 0 siblings, 1 reply; 9+ messages in thread From: Justin Cormack @ 2013-06-29 16:43 UTC (permalink / raw) To: musl [-- Attachment #1: Type: text/plain, Size: 815 bytes --] On 29 Jun 2013 17:39, "Rich Felker" <dalias@aerifal.cx> wrote: > > On Sat, Jun 29, 2013 at 05:34:46PM +0100, Justin Cormack wrote: > > > As a quick workaround then: > > > > > > -D'dlinfo(x,y,z)=(*(struct link_map *)(z) = (void *)(x))' > > > > > > Kidding aside, I wouldn't actually recommend this, since you'd be > > > encoding implementation internals (the fact that the dso handle is > > > actually the link_map pointer) into the application, which could badly > > > break if the implementation is ever changed. I'll just go ahead and > > > add this limited version of dlinfo; look for it soon and ping me if > > > you don't see it. > > > > Thanks! > > One more question: does RTLD_SELF need to work? That's a lot harder > and uglier, as it requires extra asm for each arch... > > Rich I don't think so. Justin [-- Attachment #2: Type: text/html, Size: 1155 bytes --] ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: dlinfo 2013-06-29 16:43 ` dlinfo Justin Cormack @ 2013-06-29 16:48 ` Rich Felker 2013-06-30 9:00 ` dlinfo Justin Cormack 0 siblings, 1 reply; 9+ messages in thread From: Rich Felker @ 2013-06-29 16:48 UTC (permalink / raw) To: musl On Sat, Jun 29, 2013 at 05:43:12PM +0100, Justin Cormack wrote: > On 29 Jun 2013 17:39, "Rich Felker" <dalias@aerifal.cx> wrote: > > > > On Sat, Jun 29, 2013 at 05:34:46PM +0100, Justin Cormack wrote: > > > > As a quick workaround then: > > > > > > > > -D'dlinfo(x,y,z)=(*(struct link_map *)(z) = (void *)(x))' > > > > > > > > Kidding aside, I wouldn't actually recommend this, since you'd be > > > > encoding implementation internals (the fact that the dso handle is > > > > actually the link_map pointer) into the application, which could badly > > > > break if the implementation is ever changed. I'll just go ahead and > > > > add this limited version of dlinfo; look for it soon and ping me if > > > > you don't see it. > > > > > > Thanks! > > > > One more question: does RTLD_SELF need to work? That's a lot harder > > and uglier, as it requires extra asm for each arch... > > > > Rich > > I don't think so. OK. It's implemented but untested. Take a look at current git and see if it meets your needs. Rich ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: dlinfo 2013-06-29 16:48 ` dlinfo Rich Felker @ 2013-06-30 9:00 ` Justin Cormack 0 siblings, 0 replies; 9+ messages in thread From: Justin Cormack @ 2013-06-30 9:00 UTC (permalink / raw) To: musl On Sat, Jun 29, 2013 at 5:48 PM, Rich Felker <dalias@aerifal.cx> wrote: > On Sat, Jun 29, 2013 at 05:43:12PM +0100, Justin Cormack wrote: >> On 29 Jun 2013 17:39, "Rich Felker" <dalias@aerifal.cx> wrote: >> > >> > On Sat, Jun 29, 2013 at 05:34:46PM +0100, Justin Cormack wrote: >> > > > As a quick workaround then: >> > > > >> > > > -D'dlinfo(x,y,z)=(*(struct link_map *)(z) = (void *)(x))' >> > > > >> > > > Kidding aside, I wouldn't actually recommend this, since you'd be >> > > > encoding implementation internals (the fact that the dso handle is >> > > > actually the link_map pointer) into the application, which could badly >> > > > break if the implementation is ever changed. I'll just go ahead and >> > > > add this limited version of dlinfo; look for it soon and ping me if >> > > > you don't see it. >> > > >> > > Thanks! >> > >> > One more question: does RTLD_SELF need to work? That's a lot harder >> > and uglier, as it requires extra asm for each arch... >> > >> > Rich >> >> I don't think so. > > OK. It's implemented but untested. Take a look at current git and see > if it meets your needs. Haven't been able to test yet as I have further build issues, will report back later... Thanks very much Justin ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2013-06-30 9:00 UTC | newest] Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-06-29 15:40 dlinfo Justin Cormack 2013-06-29 15:53 ` dlinfo Rich Felker 2013-06-29 16:14 ` dlinfo Justin Cormack 2013-06-29 16:31 ` dlinfo Rich Felker 2013-06-29 16:34 ` dlinfo Justin Cormack 2013-06-29 16:39 ` dlinfo Rich Felker 2013-06-29 16:43 ` dlinfo Justin Cormack 2013-06-29 16:48 ` dlinfo Rich Felker 2013-06-30 9:00 ` dlinfo Justin Cormack
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