On Wed, May 05, 2004 at 01:39:33PM -0400, Steven Augart wrote: > Dear debian-glibc list, > > It appears that libc6 on the x86 Debian (at least libc6-2.3.2-ds1-11) > is not compiled to access thread-specific state via the GS register; > instead, it seems to rely upon masking the low-bits of the stack > pointer, expecting to find the thread-specific state at the base of > the stack. This means it gets very upset if a program manipulates the > stack pointer.
Try using a 2.6 kernel instead. The base glibc supports kernels which did not allow use of the segment registers in this fashion; if you use a 2.6 kernel, support for floating stacks (and for NPTL, incidentally) will automatically be enabled. Red Hat and SuSE have a tighter coupling between their distribution and the kernels it supports than Debian does. We still have people using the 2.2 series kernels. The decision to not support floating stacks on a 2.4 kernel was made out of practicality only; we already have three versions of glibc for x86 systems, and a fourth would be overkill. -- Daniel Jacobowitz