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parisc: decide whether to go to slow path (tracesys) based on thread flags

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Al Viro
2012-05-20 11:59:03 -04:00
parent e3b880c6ee
commit 64482bd8ef
2 changed files with 6 additions and 3 deletions
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arch/parisc/kernel/syscall.S
+4 -3
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@@ -180,9 +180,10 @@ linux_gateway_entry:
/* Are we being ptraced? */
mfctl %cr30, %r1
LDREG TI_TASK(%r1),%r1
ldw TASK_PTRACE(%r1), %r1
bb,<,n %r1,31,.Ltracesys
LDREG TI_FLAGS(%r1),%r1
ldi _TIF_SYSCALL_TRACE_MASK, %r19
and,COND(=) %r1, %r19, %r0
b,n .Ltracesys
/* Note! We cannot use the syscall table that is mapped
nearby since the gateway page is mapped execute-only. */