1 files changed, 120 insertions, 0 deletions

diff --git a/arch/um/kernel/trap_user.c b/arch/um/kernel/trap_user.c
new file mode 100644
index 000000000000..50a4042a509f
--- /dev/null
+++ b/arch/um/kernel/trap_user.c
@@ -0,0 +1,120 @@
+/* 
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <asm/page.h>
+#include <asm/unistd.h>
+#include <asm/ptrace.h>
+#include "init.h"
+#include "sysdep/ptrace.h"
+#include "sigcontext.h"
+#include "sysdep/sigcontext.h"
+#include "irq_user.h"
+#include "signal_user.h"
+#include "time_user.h"
+#include "task.h"
+#include "mode.h"
+#include "choose-mode.h"
+#include "kern_util.h"
+#include "user_util.h"
+#include "os.h"
+
+void kill_child_dead(int pid)
+{
+        kill(pid, SIGKILL);
+        kill(pid, SIGCONT);
+        do {
+                int n;
+                CATCH_EINTR(n = waitpid(pid, NULL, 0));
+                if (n > 0)
+                        kill(pid, SIGCONT);
+                else
+                        break;
+        } while(1);
+}
+
+/* Unlocked - don't care if this is a bit off */
+int nsegfaults = 0;
+
+struct {
+        unsigned long address;
+        int is_write;
+        int pid;
+        unsigned long sp;
+        int is_user;
+} segfault_record[1024];
+
+void segv_handler(int sig, union uml_pt_regs *regs)
+{
+        int index, max;
+
+        if(UPT_IS_USER(regs) && !UPT_SEGV_IS_FIXABLE(regs)){
+                bad_segv(UPT_FAULT_ADDR(regs), UPT_IP(regs), 
+                         UPT_FAULT_WRITE(regs));
+                return;
+        }
+        max = sizeof(segfault_record)/sizeof(segfault_record[0]);
+        index = next_trap_index(max);
+
+        nsegfaults++;
+        segfault_record[index].address = UPT_FAULT_ADDR(regs);
+        segfault_record[index].pid = os_getpid();
+        segfault_record[index].is_write = UPT_FAULT_WRITE(regs);
+        segfault_record[index].sp = UPT_SP(regs);
+        segfault_record[index].is_user = UPT_IS_USER(regs);
+        segv(UPT_FAULT_ADDR(regs), UPT_IP(regs), UPT_FAULT_WRITE(regs),
+             UPT_IS_USER(regs), regs);
+}
+
+void usr2_handler(int sig, union uml_pt_regs *regs)
+{
+        CHOOSE_MODE(syscall_handler_tt(sig, regs), (void) 0);
+}
+
+struct signal_info sig_info[] = {
+        [ SIGTRAP ] { .handler          = relay_signal,
+                      .is_irq           = 0 },
+        [ SIGFPE ] { .handler           = relay_signal,
+                     .is_irq            = 0 },
+        [ SIGILL ] { .handler           = relay_signal,
+                     .is_irq            = 0 },
+        [ SIGWINCH ] { .handler         = winch,
+                       .is_irq          = 1 },
+        [ SIGBUS ] { .handler           = bus_handler,
+                     .is_irq            = 0 },
+        [ SIGSEGV] { .handler           = segv_handler,
+                     .is_irq            = 0 },
+        [ SIGIO ] { .handler            = sigio_handler,
+                    .is_irq             = 1 },
+        [ SIGVTALRM ] { .handler        = timer_handler,
+                        .is_irq         = 1 },
+        [ SIGALRM ] { .handler          = timer_handler,
+                      .is_irq           = 1 },
+        [ SIGUSR2 ] { .handler          = usr2_handler,
+                      .is_irq           = 0 },
+};
+
+void do_longjmp(void *b, int val)
+{
+        sigjmp_buf *buf = b;
+
+        siglongjmp(*buf, val);
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */