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Diffstat (limited to 'arch/um/os-Linux/skas/trap.c')
-rw-r--r--arch/um/os-Linux/skas/trap.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/um/os-Linux/skas/trap.c b/arch/um/os-Linux/skas/trap.c
new file mode 100644
index 000000000000..9ad5fbec4593
--- /dev/null
+++ b/arch/um/os-Linux/skas/trap.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Licensed under the GPL
+ */
+
+#include <signal.h>
+#include <errno.h>
+#include "user_util.h"
+#include "kern_util.h"
+#include "task.h"
+#include "sigcontext.h"
+#include "skas.h"
+#include "ptrace_user.h"
+#include "sysdep/ptrace.h"
+#include "sysdep/ptrace_user.h"
+#include "os.h"
+
+void sig_handler_common_skas(int sig, void *sc_ptr)
+{
+ struct sigcontext *sc = sc_ptr;
+ struct skas_regs *r;
+ void (*handler)(int, union uml_pt_regs *);
+ int save_errno = errno;
+ int save_user;
+
+ /* This is done because to allow SIGSEGV to be delivered inside a SEGV
+ * handler. This can happen in copy_user, and if SEGV is disabled,
+ * the process will die.
+ * XXX Figure out why this is better than SA_NODEFER
+ */
+ if(sig == SIGSEGV)
+ change_sig(SIGSEGV, 1);
+
+ r = &TASK_REGS(get_current())->skas;
+ save_user = r->is_user;
+ r->is_user = 0;
+ if ( sig == SIGFPE || sig == SIGSEGV ||
+ sig == SIGBUS || sig == SIGILL ||
+ sig == SIGTRAP ) {
+ GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
+ }
+
+ change_sig(SIGUSR1, 1);
+
+ handler = sig_info[sig];
+
+ /* unblock SIGALRM, SIGVTALRM, SIGIO if sig isn't IRQ signal */
+ if (sig != SIGIO && sig != SIGWINCH &&
+ sig != SIGVTALRM && sig != SIGALRM)
+ unblock_signals();
+
+ handler(sig, (union uml_pt_regs *) r);
+
+ errno = save_errno;
+ r->is_user = save_user;
+}
+
+extern int ptrace_faultinfo;
+
+void user_signal(int sig, union uml_pt_regs *regs, int pid)
+{
+ void (*handler)(int, union uml_pt_regs *);
+ int segv = ((sig == SIGFPE) || (sig == SIGSEGV) || (sig == SIGBUS) ||
+ (sig == SIGILL) || (sig == SIGTRAP));
+
+ if (segv)
+ get_skas_faultinfo(pid, &regs->skas.faultinfo);
+
+ handler = sig_info[sig];
+ handler(sig, (union uml_pt_regs *) regs);
+
+ unblock_signals();
+}