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Diffstat (limited to 'arch/um/sys-i386/stub_segv.c')
-rw-r--r--arch/um/sys-i386/stub_segv.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/um/sys-i386/stub_segv.c b/arch/um/sys-i386/stub_segv.c
new file mode 100644
index 00000000000..b251442ad0b
--- /dev/null
+++ b/arch/um/sys-i386/stub_segv.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
+ * Licensed under the GPL
+ */
+
+#include <signal.h>
+#include <asm/sigcontext.h>
+#include <asm/unistd.h>
+#include "uml-config.h"
+#include "sysdep/sigcontext.h"
+#include "sysdep/faultinfo.h"
+
+void __attribute__ ((__section__ (".__syscall_stub")))
+stub_segv_handler(int sig)
+{
+ struct sigcontext *sc = (struct sigcontext *) (&sig + 1);
+
+ GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA),
+ sc);
+
+ __asm__("movl %0, %%eax ; int $0x80": : "g" (__NR_getpid));
+ __asm__("movl %%eax, %%ebx ; movl %0, %%eax ; movl %1, %%ecx ;"
+ "int $0x80": : "g" (__NR_kill), "g" (SIGUSR1));
+ /* Pop the frame pointer and return address since we need to leave
+ * the stack in its original form when we do the sigreturn here, by
+ * hand.
+ */
+ __asm__("popl %%eax ; popl %%eax ; popl %%eax ; movl %0, %%eax ; "
+ "int $0x80" : : "g" (__NR_sigreturn));
+}