Date: Wed, 23 Feb 2000 00:20:21 +0200 (EET) From: Vladimir Kushnir <vkushnir@Alfacom.net> To: current@FreeBSD.ORG Subject: Re: "Interesting" failure mode for static linking with shared libs. Message-ID: <Pine.BSF.4.21.0002230017280.7659-100000@kushnir1.kiev.ua> In-Reply-To: <20000222090142.A29249@cons.org>
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Actually, this is a (minor) bug in binutils (see patch below): ELF
interpreteu is defined as /usr/lib/libc.so.1 rather than
(here) /usr/libexec/ld-elf.so.1
On Tue, 22 Feb 2000, Martin Cracauer wrote:
> In <32351.951188747@zippy.cdrom.com>, Jordan K. Hubbard wrote:
> > root@zippy-> cc -fPIC -c stub.c
> > root@zippy-> ld -shared -o stub.so stub.o
> > root@zippy-> cc -static test.c -o test stub.so
> > root@zippy-> ./test
> > ELF interpreter /usr/lib/libc.so.1 not found
> > Abort trap
> > root@zippy-> cc -static test.c -o test stub.o
> > root@zippy-> ./test
> > Now in the client, calling doit()
> > You have reached the stub. Please leave a message.
>
> As a workaround for a static binary, you should be able to use
> -Xlinker -Bstatic
> instead of
> -static
>
> -static links the libs statically and also leaves out the dynamic
> loading code from the binary.
>
> The former leaves the dynamic loading code in the binary, but links
> the libs statically. You have a slightly bigger binary, but you don't
> need the libs at runtime and you are resistent against changed/faked
> libs, which might do the job you want static linking for.
>
> Martin
>
Regards,
Vladimir
--- /usr/src/contrib/binutils/bfd/elf32-i386.c.orig Tue Feb 9 21:57:33 1999
+++ /usr/src/contrib/binutils/bfd/elf32-i386.c Tue Feb 9 21:55:53 1999
@@ -249,7 +249,7 @@
/* The name of the dynamic interpreter. This is put in the .interp
section. */
-#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
+#define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld-elf.so.1"
/* The size in bytes of an entry in the procedure linkage table. */
--- /usr/src/contrib/binutils/bfd/elf64-alpha.c.orig Wed Feb 10 00:39:39 1999
+++ /usr/src/contrib/binutils/bfd/elf64-alpha.c Wed Feb 10 00:40:05 1999
@@ -1018,7 +1018,7 @@
#define MAX_GOT_ENTRIES (64*1024 / 8)
-#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
+#define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld-elf.so.1"
/* Handle an Alpha specific section when reading an object file. This
is called when elfcode.h finds a section with an unknown type.
--
===========================|=======================
Vladimir Kushnir |
vkushnir@Alfacom.net | Powered by FreeBSD
kushnir@ap3.bitp.kiev.ua |
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