--- ./elfrw/elfrw.h.orig	2011-05-31 01:47:08.000000000 +0200
+++ ./elfrw/elfrw.h	2011-06-08 12:16:37.000000000 +0200
@@ -10,6 +10,24 @@
 #include <stdio.h>
 #include <elf.h>
 
+#ifdef __FreeBSD__
+typedef uint16_t Elf64_Section;
+
+#define PT_GNU_STACK	0x6474e551
+#define PT_GNU_RELRO	0x6474e552
+
+#if  __FreeBSD_version < 700022
+#define SHT_GNU_HASH	0x6ffffff6
+#define EM_CRIS		76
+#define EM_M32R		88
+#define EM_MN10300	89
+#endif
+
+#define ELFCLASSNUM 3
+#define ELFDATANUM  3
+#define EV_NUM      2
+#endif
+
 /*
  * The initialization functions. Call one of these to set the flavor
  * of ELF structures to translate to and from. The library can be
--- ./elftoc/readelf.h.orig	2011-05-22 20:46:29.000000000 +0200
+++ ./elftoc/readelf.h	2011-06-08 12:16:37.000000000 +0200
@@ -7,6 +7,12 @@
 #ifndef	_readelf_h_
 #define	_readelf_h_
 
+#ifdef __FreeBSD__
+#define ELFCLASSNUM 3
+#define ELFDATANUM  3
+#define EV_NUM      2
+#endif
+
 /* Read all of the basic headers from the file image (namely the ELF
  * header, the program segment header table, and the section header
  * table). False is returned if the file could not be parsed as an ELF
--- ./elftoc/pieces.c.orig	2011-05-26 03:25:14.000000000 +0200
+++ ./elftoc/pieces.c	2011-06-08 12:16:37.000000000 +0200
@@ -16,6 +16,10 @@
 #include "out.h"
 #include "pieces.h"
 
+#ifdef __FreeBSD__
+typedef uint64_t Elf32_Xword;
+#endif
+
 /* Flags used to insert warnings in the generated source code.
  */
 #define	PW_MISALIGNED	0x0001	/* piece misaligned for original type */
--- ./elftoc/outbase.h.orig	2011-05-22 20:46:29.000000000 +0200
+++ ./elftoc/outbase.h	2011-06-08 12:16:37.000000000 +0200
@@ -7,6 +7,10 @@
 #ifndef _outbase_h_
 #define _outbase_h_
 
+#ifdef __FreeBSD__
+#define NT_AUXV     6
+#endif
+
 /* Set the current output file. Call this before calling any output
  * functions. (The FILE* argument is given as a void* so as to not
  * include stdio.h here.)