Re: glibc broken

[Marcus Brinkmann]

On Tue, May 22, 2001 at 11:04:54PM -0400, Roland McGrath wrote:
> Also test whether running a program via ld.so works,
> i.e. /lib/ld.so.1 /bin/foo arg1 arg2
> 
> This is how exec gets run.  Try /lib/ld.so.1 /hurd/exec --help.

And Roland won the price again!  All Hurd servers and user space programs
which I tried that link to Hurd libraries, like msgport and rpctrace, fail
with this invocation type.

dynamically linked programs fail with:
/hurd/hello: error while loading shared libraries: /hurd/hello: cannot open 
shared object file: No such file or directory

statically linked programs fail with:
Killed

A backtrace for the latter is here:

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This GDB was configured as "i386-unknown-gnu0.2"...
(gdb) set args /hurd/ext2fs.static
(gdb) run
Starting program: /lib/ld.so /hurd/ext2fs.static

Program received signal EXC_BAD_ACCESS, Could not access memory.
0xba5a in _dl_map_object_deps (map=0xd776, preloads=0x1021af4, npreloads=0, 
    trace_mode=131984) at ../hurd/hurd/threadvar.h:115
115     ../hurd/hurd/threadvar.h: No such file or directory.
(gdb) bt full
#0  0xba5a in _dl_map_object_deps (map=0xd776, preloads=0x1021af4, 
    npreloads=0, trace_mode=131984) at ../hurd/hurd/threadvar.h:115
        objname = 0x1021bcc "\001"
        newp = (struct list *) 0x0
        strtab = 0x0
        args = {map = 0xd6d6, trace_mode = 129756, 
  strtab = 0x20070 "\220\003\002", name = 0x1 <Address 0x1 out of bounds>, 
  aux = 0xd3de89e3}
        orig = (struct list *) 0x8d148d05
        d = (Elf32_Dyn *) 0xe9c1f189
        l = (struct link_map *) 0x1
        needed = (struct link_map **) 0x0
        nneeded = 0
        known = (struct list (*)[0]) 0x1021aec
        runp = (struct list *) 0x0
        utail = (struct list *) 0x1021a1c
        dtail = (struct list *) 0x1021a1c
        nlist = 1
        nduplist = 16915148
        i = 129756
        errno_saved = 16148
        errno_reason = 131984
        errstring = 0x0
#1  0x1fadc in ?? ()
No symbol table info available.
#2  0x5039 in decompose_rpath (sps=0x1fadc, rpath=0xf61c "[\201ÃÀ\004\001", 
    l=0x0, what=0x8048034 "\001") at dl-load.c:523
        len = 131984
        found = 0x0
        where = 0x0
        copy = 0x3 <Address 0x3 out of bounds>
        cp = 0x0
        result = (struct r_search_path_elem **) 0xf63f
        nelems = 131984
#3  0xf85e in __fxstat (vers=16915516, fd=0, buf=0x1021c40)
    at ../hurd/hurd.h:70
        err = 131984
        err = 0
#4  0x11942 in __mprotect (addr=0x1022000, len=16915840, prot=16915860)
    at ../hurd/hurd/threadvar.h:84
        prot = 131984
        err = 131984
        vmprot = 0
#5  0xf989 in __access (file=0x1022000 "/lib/ld.so", type=16292)
    at ../hurd/hurd/threadvar.h:84
No locals.
#6  0x3e5a in dl_main (phdr=0x1022000, phnum=16916056, user_entry=0x0)
    at rtld.c:948
        strtab = 0x1ff4c ""
        dyn = (Elf32_Dyn *) 0x20390
        ent = (Elf32_Verneed *) 0x1021f44
        first = 0
        map = (struct link_map *) 0x0
        phnum = 0
        ph = (Elf32_Phdr *) 0x1021ac8
        mode = 16915884
        preloads = (struct link_map **) 0x0
        npreloads = 15920
        file_size = 0
        file = 0x1021de4 "ô\037\002\001Ë="
        has_interp = 16292
        i = 0
        rtld_is_main = 16916480
#7  0x3dcb in dl_main (phdr=0x1022000, phnum=1651076143, user_entry=0x2e646c2f)
    at rtld.c:912
        args = {l = 0x0, lazy = 0}
        l = (struct link_map *) 0x1021ac8
        phnum = 0
        ph = (Elf32_Phdr *) 0x1021ac8
        mode = normal
        preloads = (struct link_map **) 0x0
        npreloads = 0
        file_size = 0
        file = 0x0
        has_interp = 0
        i = 0
        rtld_is_main = 0
(gdb) info reg
eax            0x0      0
ecx            0x20390  131984
edx            0x20390  131984
ebx            0x1fadc  129756
esp            0x1021a1c        0x1021a1c
ebp            0x1021ae4        0x1021ae4
esi            0x1021ac8        16915144
edi            0x0      0
eip            0xba5a   0xba5a
eflags         0x10246  66118
cs             0x17     23
ss             0x1f     31
ds             0x1f     31
es             0x1f     31
fs             0x1f     31
gs             0x1f     31
fctrl          0x0      0
fstat          0x0      0
ftag           0x0      0
fiseg          0x0      0
fioff          0x0      0
foseg          0x0      0
fooff          0x0      0
fop            0x0      0
(gdb) x
0x0:    Cannot access memory at address 0x0
(gdb) quit
The program is running.  Exit anyway? (y or n) 
 
Thanks,
Marcus

-- 
`Rhubarb is no Egyptian god.' Debian http://www.debian.org brinkmd@debian.org
Marcus Brinkmann              GNU    http://www.gnu.org    marcus@gnu.org
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de