From: Al Viro Date: Sun, 9 Dec 2012 06:16:14 +0000 (+0000) Subject: parisc: fix ptrace breakage X-Git-Tag: v3.9-rc1~102^2~14 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=52ab532ea76d30b7e7a7b98021e2e873e83029a5;p=pandora-kernel.git parisc: fix ptrace breakage 1) PTRACE_SYSCALL doesn't work for 64bit process on parisc64. Compat syscall table is used instead of 64bit one. IMO we should either refuse to allow PTRACE_SYSCALL for 64bit processes or duplicate the logics choosing the right syscall table into .Ltracesys. 2) if you have let the tracee run with PTRACE_SYSCALL and it had stopped, you can use PTRACE_POKEUSR to modify syscall number (r20) and arguments 1--4 (r26--r23). Modifications will have effect. However, modifying arguments 5 and 6 (r22 and r21 resp.) works only when process (32bit one) runs on 64bit host - on 32bit one it has no effect. AFAICS, the diff below should fix that one. Signed-off-by: Al Viro Tested-by: John David Anglin Signed-off-by: Helge Deller --- Reading git-diff-tree failed