fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / x86_64 / kernel / signal.c

diff --git a/arch/x86_64/kernel/signal.c b/arch/x86_64/kernel/signal.c
index 7f58bc9..e299f98 100644 (file)
--- a/arch/x86_64/kernel/signal.c
+++ b/arch/x86_64/kernel/signal.c
@@ -17,7 +17,7 @@
 #include <linux/signal.h>
 #include <linux/errno.h>
 #include <linux/wait.h>
-#include <linux/ptrace.h>
+#include <linux/tracehook.h>
 #include <linux/unistd.h>
 #include <linux/stddef.h>
 #include <linux/personality.h>
@@ -277,11 +277,6 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 #endif
 
        /* Set up registers for signal handler */
-       { 
-               struct exec_domain *ed = current_thread_info()->exec_domain;
-               if (unlikely(ed && ed->signal_invmap && sig < 32))
-                       sig = ed->signal_invmap[sig];
-       } 
        regs->rdi = sig;
        /* In case the signal handler was declared without prototypes */ 
        regs->rax = 0;  
@@ -302,9 +297,6 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
           see include/asm-x86_64/uaccess.h for details. */
        set_fs(USER_DS);
 
-       regs->eflags &= ~TF_MASK;
-       if (test_thread_flag(TIF_SINGLESTEP))
-               ptrace_notify(SIGTRAP);
 #ifdef DEBUG_SIG
        printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",
                current->comm, current->pid, frame, regs->rip, frame->pretcode);
@@ -356,16 +348,12 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
        }
 
        /*
-        * If TF is set due to a debugger (PT_DTRACE), clear the TF
-        * flag so that register information in the sigcontext is
-        * correct.
+        * If TF is set due to a debugger (TIF_FORCED_TF), 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;
-               }
-       }
+       if (unlikely(regs->eflags & TF_MASK)
+           && likely(test_and_clear_thread_flag(TIF_FORCED_TF)))
+               regs->eflags &= ~TF_MASK;
 
 #ifdef CONFIG_IA32_EMULATION
        if (test_thread_flag(TIF_IA32)) {
@@ -384,6 +372,15 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
                        sigaddset(&current->blocked,sig);
                recalc_sigpending();
                spin_unlock_irq(&current->sighand->siglock);
+
+               /*
+                * Clear TF when entering the signal handler, but
+                * notify any tracer that was single-stepping it.
+                * The tracer may want to single-step inside the
+                * handler too.
+                */
+               regs->eflags &= ~TF_MASK;
+               tracehook_report_handle_signal(sig, ka, oldset, regs);
        }
 
        return ret;