Initial import of qemu-2.4.1HEADmaster

1 files changed, 34 insertions, 0 deletions

diff --git a/roms/ipxe/src/arch/i386/include/bochs.h b/roms/ipxe/src/arch/i386/include/bochs.h
new file mode 100644
index 00000000..9d090fc1
--- /dev/null
+++ b/roms/ipxe/src/arch/i386/include/bochs.h
@@ -0,0 +1,34 @@
+#ifndef BOCHS_H
+#define BOCHS_H
+
+/** @file
+ *
+ * bochs breakpoints
+ *
+ * This file defines @c bochsbp, the magic breakpoint instruction that
+ * is incredibly useful when debugging under bochs.  This file should
+ * never be included in production code.
+ *
+ * Use the pseudo-instruction @c bochsbp in assembly code, or the
+ * bochsbp() function in C code.
+ *
+ */
+
+#ifdef ASSEMBLY
+
+/* Breakpoint for when debugging under bochs */
+#define bochsbp xchgw %bx, %bx
+#define BOCHSBP bochsbp
+
+#else /* ASSEMBLY */
+
+/** Breakpoint for when debugging under bochs */
+static inline void bochsbp ( void ) {
+	__asm__ __volatile__ ( "xchgw %bx, %bx" );
+}
+
+#endif /* ASSEMBLY */
+
+#warning "bochs.h should not be included into production code"
+
+#endif /* BOCHS_H */