tree 1ce31b822346bb65864813d774a67037c7d3b684
parent b957591fee753101f289615abab1c54ff7b1d29d
author Andi Kleen <[EMAIL PROTECTED]> Sun, 17 Apr 2005 05:25:00 -0700
committer Linus Torvalds <[EMAIL PROTECTED]> Sun, 17 Apr 2005 05:25:00 -0700
[PATCH] x86_64: Fix interaction of single stepping with debuggers
Ported from i386/Linus
Fix another TF corner case. Need to do the special TF handling for all
signals to make debuggers happy
Signed-off-by: Andi Kleen <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
x86_64/kernel/signal.c | 12 ++++++++++++
1 files changed, 12 insertions(+)
Index: arch/x86_64/kernel/signal.c
===================================================================
--- 369eccf7e24a263627977dd7a0986e779449c30d/arch/x86_64/kernel/signal.c
(mode:100644 sha1:4ff0f0117a091c991d63860cc2aae31184311e47)
+++ 1ce31b822346bb65864813d774a67037c7d3b684/arch/x86_64/kernel/signal.c
(mode:100644 sha1:7760224cdfe39af70467cb2f8e28153389f979aa)
@@ -368,6 +368,18 @@
}
}
+ /*
+ * If TF is set due to a debugger (PT_DTRACE), clear the TF
+ * flag so that register information in the sigcontext is
+ * correct.
+ */
+ if (unlikely(regs->eflags & TF_MASK)) {
+ if (likely(current->ptrace & PT_DTRACE)) {
+ current->ptrace &= ~PT_DTRACE;
+ regs->eflags &= ~TF_MASK;
+ }
+ }
+
#ifdef CONFIG_IA32_EMULATION
if (test_thread_flag(TIF_IA32)) {
if (ka->sa.sa_flags & SA_SIGINFO)
-
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