[parisc-linux] ldd segfaulting?

[parisc-linux] ldd segfaulting?

[Randolph Chung]

I think this may be related to what bdale has been seeing...

frodo:~# cat test.c
int main(int a, char **b) { return 0; }
frodo:~# gcc -o test test.c
frodo:~# ./test
frodo:~# ldd ./test

do_page_fault() pid=144 command='ld.so.1'

     YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
PSW: 00000000000001001000000100001011
r0-3	 00000000 2aac367c 2aaacd67 2aaaa2f0
r4-7	 2aac367c 2aaab4e8 2aac3622 2aac02b8
r8-11	 20020048 2aaaccb8 2aaaa2f0 00000000
r12-15	 00000081 00000080 200201e8 2001fe10
r16-19	 00000000 00000000 00000000 2aac367c
r20-23	 00000000 2aaaa000 2aaaa000 00000041
r24-27	 2aaaa000 70000021 20020048 00076b50
r28-31	 00000021 20020048 200202c0 2aaacd1b
sr0-4	 00000000 00002003 00000000 00002003
sr4-8	 00002003 00002003 00002003 00002003

IASQ: 00002003 00002003 IAOQ: 2aaadc63 2aaadc67
 IIR: 0ce61280    ISR: 00002003  IOR: 2aac02b8
ORIG_R28: 00086350

do_page_fault() pid=145 command='ld.so.1'

     YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
PSW: 00000000000001001000000100001011
r0-3	 00000000 2aac367c 2aaacd67 2aaaa2f0
r4-7	 2aac367c 2aaab4e8 2aac3622 2aac02b8
r8-11	 20020048 2aaaccb8 2aaaa2f0 00000000
r12-15	 00000081 00000080 200201e8 2001fe10
r16-19	 00000000 00000000 00000000 2aac367c
r20-23	 00000000 2aaaa000 2aaaa000 00000041
r24-27	 2aaaa000 70000021 20020048 00076b50
r28-31	 00000021 20020048 200202c0 2aaacd1b
sr0-4	 00000000 00002003 00000000 00002003
sr4-8	 00002003 00002003 00002003 00002003

IASQ: 00002003 00002003 IAOQ: 2aaadc63 2aaadc67
 IIR: 0ce61280    ISR: 00002003  IOR: 2aac02b8
ORIG_R28: 00090190
ldd: /lib/ld.so.1 exited with unknown exit code (139)
frodo:~# gcc --version
2.96
frodo:~# ldd --version
ldd (GNU libc) 2.1.95
Copyright (C) 1999 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.
frodo:~# 

Any ideas what's going on? I've tried this both with a Oct26 kernel and
one that is from cvs today. Same results.

randolph
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Re: [parisc-linux] ldd segfaulting?

[Alan Modra]

On Sat, 4 Nov 2000, Randolph Chung wrote:

> frodo:~# ldd ./test
> 
> do_page_fault() pid=144 command='ld.so.1'

Most likely a case of new kernel, ld.so compiled with old gcc.  Old is
earlier than 25th Oct.  Before that gcc put plabels, which need
relocating, in .rodata, which is mapped read-only.  The new kernel
enforces the read-only mapping, so you run into problems when ld.so tries
to relocate itself.

Fortunately, you only need recompile glibc with a new gcc.  Older binaries
with plabels in .rodata are handled OK as ld.so re-maps the segments
read/write, something it doesn't manage to do for itself.

Alan Modra
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