The problem
http://www.uwsg.iu.edu/hypermail/linux/kernel/0006.1/0841.html
which was fixed in 2.2.17 still remains in 2.4.0.
Here is a patch for 2.4.0
% diff -u traps.c-2.4.0-test7 traps.c
--- traps.c-2.4.0-test7 Sat Aug 5 00:15:38 2000
+++ traps.c Thu Sep 21 11:51:29 2000
@@ -520,6 +520,9 @@
if (regs->eflags & VM_MASK)
goto debug_vm86;
+ /* Save debug status register where ptrace can see it */
+ tsk->thread.debugreg[6] = condition;
+
/* Mask out spurious TF errors due to lazy TF clearing */
if (condition & DR_STEP) {
/*
%
-- Jim
James Cownie <jcownie@etnus.com>
Etnus, LLC. +44 117 9071438
http://www.etnus.com
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This archive was generated by hypermail 2b29 : Sat Sep 23 2000 - 21:00:24 EST