uml: more __init annotations

[linux-2.6-omap-h63xx.git] / arch / um / os-Linux / signal.c

diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index 266768629fee6de48152d0674333685a72578021..18e5c8b67eb8cebbe84db25bed7e64e623522dc9 100644 (file)
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -11,7 +11,6 @@
 #include <stdarg.h>
 #include <string.h>
 #include <sys/mman.h>
-#include "user_util.h"
 #include "user.h"
 #include "signal_kern.h"
 #include "sysdep/sigcontext.h"
@@ -62,15 +61,19 @@ void sig_handler(int sig, struct sigcontext *sc)
 
 static void real_alarm_handler(int sig, struct sigcontext *sc)
 {
+       union uml_pt_regs regs;
+
        if(sig == SIGALRM)
                switch_timers(0);
 
-       CHOOSE_MODE_PROC(sig_handler_common_tt, sig_handler_common_skas,
-                        sig, sc);
+       if(sc != NULL)
+               copy_sc(&regs, sc);
+       regs.skas.is_user = 0;
+       unblock_signals();
+       timer_handler(sig, &regs);
 
        if(sig == SIGALRM)
                switch_timers(1);
-
 }
 
 void alarm_handler(int sig, struct sigcontext *sc)
@@ -114,6 +117,46 @@ void remove_sigstack(void)
 
 void (*handlers[_NSIG])(int sig, struct sigcontext *sc);
 
+void handle_signal(int sig, struct sigcontext *sc)
+{
+       unsigned long pending = 0;
+
+       do {
+               int nested, bail;
+
+               /*
+                * pending comes back with one bit set for each
+                * interrupt that arrived while setting up the stack,
+                * plus a bit for this interrupt, plus the zero bit is
+                * set if this is a nested interrupt.
+                * If bail is true, then we interrupted another
+                * handler setting up the stack.  In this case, we
+                * have to return, and the upper handler will deal
+                * with this interrupt.
+                */
+               bail = to_irq_stack(sig, &pending);
+               if(bail)
+                       return;
+
+               nested = pending & 1;
+               pending &= ~1;
+
+               while((sig = ffs(pending)) != 0){
+                       sig--;
+                       pending &= ~(1 << sig);
+                       (*handlers[sig])(sig, sc);
+               }
+
+               /* Again, pending comes back with a mask of signals
+                * that arrived while tearing down the stack.  If this
+                * is non-zero, we just go back, set up the stack
+                * again, and handle the new interrupts.
+                */
+               if(!nested)
+                       pending = from_irq_stack(nested);
+       } while(pending);
+}
+
 extern void hard_handler(int sig);
 
 void set_handler(int sig, void (*handler)(int), int flags, ...)