Messages in this thread Patch in this message | | | Subject | [patch 079/198] x86_64: Fix interaction of single stepping with debuggers | From | akpm@osdl ... | Date | Tue, 12 Apr 2005 03:31:48 -0700 |
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From: "Andi Kleen" <ak@suse.de>
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 <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> ---
25-akpm/arch/x86_64/kernel/signal.c | 12 ++++++++++++ 1 files changed, 12 insertions(+)
diff -puN arch/x86_64/kernel/signal.c~x86_64-fix-interaction-of-single-stepping-with-debuggers arch/x86_64/kernel/signal.c --- 25/arch/x86_64/kernel/signal.c~x86_64-fix-interaction-of-single-stepping-with-debuggers 2005-04-12 03:21:22.220758832 -0700 +++ 25-akpm/arch/x86_64/kernel/signal.c 2005-04-12 03:21:22.223758376 -0700 @@ -368,6 +368,18 @@ handle_signal(unsigned long sig, siginfo } } + /* + * 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) _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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