[uClibc] Re: [uClibc-cvs] CVS uClibc/ldso/ldso

[Mike Frysinger]

On Monday 11 October 2004 10:56 am, Joakim Tjernlund wrote:
> Are you sure glibc works like this?
> I had a look in glibc and I think glibc disables the cache for suid, so I
> assumed uClibc should do the same. Check libc/elf/dl-load.c, around line
> 1832 in glibc to see if I read the code right.

like i said, i only know what 'works' :)
vapier at coral 0 ~ $ ldd /bin/su
ldd: error: you do not have read permission for `/bin/su'
vapier at coral 0 ~ $ su -
Password: 
root at coral 0 ~ # ls -l /bin/su
-rws--x--x  1 root root 21008 Jul  4 18:22 /bin/su
root at coral 0 ~ # ldd /bin/su
        libcrypt.so.1 => /lib/libcrypt.so.1 (0x40029000)
        libpam.so.0 => /lib/libpam.so.0 (0x4005d000)
        libpam_misc.so.0 => /lib/libpam_misc.so.0 (0x4006c000)
        libc.so.6 => /lib/libc.so.6 (0x40076000)
        libdl.so.2 => /lib/libdl.so.2 (0x4019b000)
        libgcc_s.so.1 
=> /usr/lib/gcc-lib/armv4l-unknown-linux-gnu/3.3.4/libgcc_s.so.1 (0x401a6000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
root at coral 0 ~ # ldconfig -p | grep libgcc_s
        libgcc_s.so.1 (libc6) 
=> /usr/lib/gcc-lib/armv4l-unknown-linux-gnu/3.3.4/libgcc_s.so.1
        libgcc_s.so (libc6) 
=> /usr/lib/gcc-lib/armv4l-unknown-linux-gnu/3.3.4/libgcc_s.so

i see the INTUSE(__libc_enable_secure) wrapping the cache search in glibc, but 
i really dont know what that does ;)

> Also, should not libgcc_s.so.1 be in /lib?

that's a different problem (non-uClibc), but unrelated to the technical matter 
here :)
-mike