Index: lib/libproc/proc_bkpt.c
===================================================================
--- lib/libproc/proc_bkpt.c
+++ lib/libproc/proc_bkpt.c
@@ -56,7 +56,11 @@
 #define	BREAKPOINT_INSTR	0xe7ffffff	/* bkpt */
 #define	BREAKPOINT_INSTR_SZ	4
 #elif defined(__mips__)
+#if (defined(__mips_n64) || defined(__mips_o64)) && BYTE_ORDER == BIG_ENDIAN
+#define	BREAKPOINT_INSTR	0xd00000000UL	/* break */
+#else
 #define	BREAKPOINT_INSTR	0xd	/* break */
+#endif
 #define	BREAKPOINT_INSTR_SZ	4
 #elif defined(__powerpc__)
 #define	BREAKPOINT_INSTR	0x7fe00008	/* trap */