From: Tyson Whitehead <twhitehead@gmail.com>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: Tyson Whitehead via Libc-alpha <libc-alpha@sourceware.org>
Subject: Re: Running via <ld.so> gives a different executable
Date: Fri, 26 Feb 2021 16:08:05 -0500 [thread overview]
Message-ID: <CAJbx2R6P8CCROZvpBK1m3J2TppQK7UpW8gVEH7S2quYMHD=TRg@mail.gmail.com> (raw)
In-Reply-To: <878s7ar5tj.fsf@igel.home>
From the prctrl man page, it sounded like
prctl(PR_SET_MM_EXE_FILE, ...)
would let you do this once for Linux 3.5-4.9 and multiple times for 4.10+.
Am I correct in understanding you are saying that the system execve call
uses this one-time opportunity?
Thanks! -Tyson
On Fri, 26 Feb 2021 at 14:23, Andreas Schwab <schwab@linux-m68k.org> wrote:
> This cannot be fixed in user-space. The kernel always uses the first
> argument of the execve syscall as the exe link, and it cannot be changed
> afterwards.
>
> Andreas.
>
> --
> Andreas Schwab, schwab@linux-m68k.org
> GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
> "And now for something completely different."
>
next prev parent reply other threads:[~2021-02-26 21:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-26 18:21 Tyson Whitehead
2021-02-26 19:23 ` Andreas Schwab
2021-02-26 21:08 ` Tyson Whitehead [this message]
2021-02-26 21:23 ` Andreas Schwab
2021-02-26 21:53 ` Tyson Whitehead
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