1 files changed, 33 insertions, 0 deletions
diff --git a/roms/ipxe/src/arch/i386/include/biosint.h b/roms/ipxe/src/arch/i386/include/biosint.h
new file mode 100644
index 00000000..ab466af3
--- /dev/null
+++ b/roms/ipxe/src/arch/i386/include/biosint.h
@@ -0,0 +1,33 @@
+#ifndef BIOSINT_H
+#define BIOSINT_H
+
+/**
+ * @file BIOS interrupts
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <realmode.h>
+
+struct segoff;
+
+/**
+ * Hooked interrupt count
+ *
+ * At exit, after unhooking all possible interrupts, this counter
+ * should be examined.  If it is non-zero, it means that we failed to
+ * unhook at least one interrupt vector, and so must not free up the
+ * memory we are using.  (Note that this also implies that we should
+ * re-hook INT 15 in order to hide ourselves from the memory map).
+ */
+extern uint16_t __text16 ( hooked_bios_interrupts );
+#define hooked_bios_interrupts __use_text16 ( hooked_bios_interrupts )
+
+extern void hook_bios_interrupt ( unsigned int interrupt, unsigned int handler,
+				  struct segoff *chain_vector );
+extern int unhook_bios_interrupt ( unsigned int interrupt,
+				   unsigned int handler,
+				   struct segoff *chain_vector );
+
+#endif /* BIOSINT_H */