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| From | Melzzzzz <mel@zzzzz.com> |
| Newsgroups | comp.programming |
| Subject | Re: code and data |
| Date | Tue, 21 Oct 2014 00:11:37 +0200 |
| Organization | albasani.net |
| Lines | 54 |
| Message-ID | <20141021001137.6b93d8c5@maxa-pc> (permalink) |
| References | <m23paq$4ht$1@speranza.aioe.org> <20141020222517.4d3ceaf8@maxa-pc> <m23v5n$jib$1@speranza.aioe.org> |
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On Mon, 20 Oct 2014 17:34:56 -0400 "Bill Cunningham" <nospam@nspam.invalid> wrote: > > "Melzzzzz" <mel@zzzzz.com> wrote in message > news:20141020222517.4d3ceaf8@maxa-pc... > > On Mon, 20 Oct 2014 15:55:15 -0400 > > "Bill Cunningham" <nospam@nspam.invalid> wrote: > > > >> Now is a flat binary only data or does it contain any code? I > >> know the sections are stripped away. > >> > >> Bill > >> > >> > > > > What you mean by that? You can load binary into RAM and execute > > it no problem on Linux and Windows. > > Only if there is relaocatable data mapped by the linker or loader > for execution. Well, you can write relocatable code in assembler or compile with PIC... I did it. Loaded file in memory, mprotect it and just casted to pointer to function and ...;) And the binary happens to have executable code. If you > remove section (or segment) headers which would be meaningful code, > You'll have something that linux's file command would call data > because it's unidentifiable. Not all binaries are executable on their > own. JPEGs have a header and are binaries but not executable. You can execute anything in memory. Question is if you would get meaningful result ;) > > What exactly is left when something has been reduced to a "flat > binary"? That is what I'm meaning. Linux certainly can't identify it > I know that. Flat binary can be loaded into memory and run no problem. It just need to have position independent code. > > Bill > > -- Manjaro all the way! http://manjaro.org/
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code and data "Bill Cunningham" <nospam@nspam.invalid> - 2014-10-20 15:55 -0400
Re: code and data Melzzzzz <mel@zzzzz.com> - 2014-10-20 22:25 +0200
Re: code and data "Bill Cunningham" <nospam@nspam.invalid> - 2014-10-20 17:34 -0400
Re: code and data Melzzzzz <mel@zzzzz.com> - 2014-10-21 00:11 +0200
Re: code and data "Bill Cunningham" <nospam@nspam.invalid> - 2014-10-20 20:01 -0400
Re: code and data Richard Heathfield <invalid@see.sig.invalid> - 2014-10-20 21:29 +0100
Re: code and data "Bill Cunningham" <nospam@nspam.invalid> - 2014-10-20 17:38 -0400
Re: code and data Richard Heathfield <invalid@see.sig.invalid> - 2014-10-20 23:09 +0100
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