Re: PPC cross with NPTL

[Peter Schaefer <peter dot schaefer at gmx dot de>]

Am 03.08.2005 23:30, Paul Bilke wrote:
> Using crosstool-0.37 I have been trying to build a PPC-604 with NPTL
> target on x86 host. Multiple configurations fail with the same error but
> the included info is for
> gcc-4.0.0 and glibc-2.3.5
> 
> It fails building the GLIB trying to create tcb-offsets.h
> 
> It is trying to build the following from STDIN:
> 
> #include <sysdep.h>
> #include <tls.h>
> void dummy(void) {
> # undef __thread_register
> # define __thread_register    ((void *) 0)
> # define thread_offsetof(mem)    ((void *) &THREAD_SELF->mem - (void *) 0)
> #if TLS_MULTIPLE_THREADS_IN_TCB
> asm ("@@@name@@@MULTIPLE_THREADS_OFFSET@@@value@@@%0@@@end@@@" : : "i"
> (thread_offsetof (header.multiple_threads)));
> #endif
> asm ("@@@name@@@PID@@@value@@@%0@@@end@@@" : : "i" (thread_offsetof (pid)));
> asm ("@@@name@@@TID@@@value@@@%0@@@end@@@" : : "i" (thread_offsetof (tid)));
> }
> 
> There seems to be issues on several arch's building this but I have yet
> to find any resolution to this issue.
> 
> Any help would be appreciated!

You can try the following patch:

--- libc/nptl/sysdeps/powerpc/tcb-offsets.sym	2004/12/15 06:07:00	1.5
+++ libc/nptl/sysdeps/powerpc/tcb-offsets.sym	2005/02/14 22:44:12	1.6
@@ -6,7 +6,8 @@
 -- Abuse tls.h macros to derive offsets relative to the thread register.
 # undef __thread_register
 # define __thread_register	((void *) 0)
-# define thread_offsetof(mem)	((void *) &THREAD_SELF->mem - (void *) 0)
+# define thread_offsetof(mem)	((ptrdiff_t) THREAD_SELF + offsetof (struct pthread, mem))
+

 #if TLS_MULTIPLE_THREADS_IN_TCB
 MULTIPLE_THREADS_OFFSET		thread_offsetof (header.multiple_threads)

Best regards,

 Peter

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