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SubjectRe: gdb strangness Under 2.3.11-pre1
On Sat, 17 Jul 1999, Ingo Molnar wrote:

> oh, ok, not my fault then, just a coincidence :)

No, Linus' fault. ;-)

--- linux/kernel/ptrace.c~ Sun Jul 18 01:48:21 1999
+++ linux/kernel/ptrace.c Sun Jul 18 01:49:52 1999
@@ -39,6 +39,8 @@
if (!pte_present(*pgtable))
goto fault_in_page;
page = pte_page(*pgtable);
+ if (write && !pte_write(*pgtable))
+ goto fault_in_page;
if (MAP_NR(page) >= max_mapnr)
return 0;
flush_cache_page(vma, addr);
We probably have to mark the page dirty if (write) as well; exercise for
the reader I guess. The 'if (pgd_none(*pgdir))' looks suspicious too --
should that that be !pgd_present?
Tim.
*/


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