[PATCH] Add support for GNU Hurd.

[Stefan Tauner]

Signed-off-by: Stefan Tauner 
---
 hwaccess.c | 8 +++++++-
 os.h       | 3 +++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/hwaccess.c b/hwaccess.c
index 528550d..cfb6291 100644
--- a/hwaccess.c
+++ b/hwaccess.c
@@ -25,6 +25,7 @@
 #include <stdlib.h>
 #include <errno.h>
 #include <sys/types.h>
+#include <sys/io.h>
 #if !defined (__DJGPP__) && !defined(__LIBPAYLOAD__)
 /* No file access needed/possible to get hardware access permissions. */
 #include <unistd.h>
@@ -33,12 +34,13 @@
 #include "flash.h"
 #include "hwaccess.h"

-#if !(IS_LINUX || IS_MACOSX || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__DJGPP__) || defined(__LIBPAYLOAD__) || defined(__sun))
+#if !(IS_LINUX || IS_MACOSX || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__DJGPP__) || defined(__LIBPAYLOAD__) || defined(__sun) || defined(__gnu_hurd__))
 #error "Unknown operating system"
 #endif

#define USE_IOPL	(IS_LINUX || IS_MACOSX || defined(__NetBSD__) || defined(__OpenBSD__))
 #define USE_DEV_IO	(defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__))
+#define USE_IOPERM	(defined(__gnu_hurd__))

#if IS_X86 && USE_DEV_IO
 int io_fd;
@@ -82,6 +84,8 @@ static int release_io_perms(void *p)
    sysi86(SI86V86, V86SC_IOPL, 0);
 #elif USE_DEV_IO
    close(io_fd);
+#elif USE_IOPERM
+	ioperm(0, 65536, 0);
 #elif USE_IOPL
    iopl(0);
 #endif
@@ -97,6 +101,8 @@ int rget_io_perms(void)
    if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) != 0) {
 #elif USE_DEV_IO
    if ((io_fd = open("/dev/io", O_RDWR)) < 0) {
+#elif USE_IOPERM
+	if (ioperm(0, 65536, 1) != 0) {
 #elif USE_IOPL
    if (iopl(3) != 0) {
 #endif
diff --git a/os.h b/os.h
index e5f72e4..b59e087 100644
--- a/os.h
+++ b/os.h
@@ -56,6 +56,9 @@
 // libpayload
 #elif defined(__LIBPAYLOAD__)
 #define __FLASHROM_OS__ "libpayload"
+// GNU Hurd
+#elif defined(__gnu_hurd__)
+#define __FLASHROM_OS__ "Hurd"
 // Linux
 #elif defined(__linux__)
    // There are various flags in use on Android apparently. __ANDROID__ seems to be the most trustworthy.