Signed-off-by: Thomas Meyer <tho...@m3y3r.de>
---
arch/um/kernel/trap.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index 5915887..4e6fcb3 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -183,6 +183,16 @@ void fatal_sigsegv(void)
os_dump_core();
}
+/**
+ * segv_handler() - the SIGSEGV handler
+ * @sig: the signal number
+ * @unused_si: the signal info struct; unused in this handler
+ * @regs: the ptrace register information
+ *
+ * The handler first extracts the faultinfo from the UML ptrace regs struct.
+ * If the userfault did not happen in an UML userspace process, bad_segv is
called.
+ * Otherwise the signal did happen in a cloned userspace process, handle it.
+ */
void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs)
{
struct faultinfo * fi = UPT_FAULTINFO(regs);
--
2.9.3
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