Interrupt testing

[phcoder]

Hello. Here is a trivial patch for testing which interrupts are and 
which aren't handled by BIOS. Can be used as a simple but not reliable 
test for boot viruses


--

Regards
Vladimir 'phcoder' Serbinenko

Index: conf/i386-pc.rmk
===================================================================
--- conf/i386-pc.rmk    (revision 2021)
+++ conf/i386-pc.rmk    (working copy)
@@ -172,3 +181,3 @@
        vbe.mod vbetest.mod vbeinfo.mod play.mod serial.mod     \
        ata.mod vga.mod memdisk.mod pci.mod lspci.mod \
        aout.mod _bsd.mod bsd.mod pxe.mod pxecmd.mod datetime.mod date.mod \
        datehook.mod lsmmap.mod ata_pthru.mod hdparm.mod \
-       usb.mod uhci.mod ohci.mod usbtest.mod usbms.mod usb_keyboard.mod
+       usb.mod uhci.mod ohci.mod usbtest.mod usbms.mod usb_keyboard.mod \
+       inttest.mod
 
+# For inttest.mod.
+inttest_mod_SOURCES = commands/i386/pc/inttest.c
+inttest_mod_CFLAGS = $(COMMON_CFLAGS) -Werror
+inttest_mod_LDFLAGS = $(COMMON_LDFLAGS)
Index: ChangeLog
===================================================================
--- ChangeLog   (revision 2021)
+++ ChangeLog   (working copy)
@@ -1,3 +1,10 @@
+2009-03-07  Vladimir Serbinenko  <address@hidden>
+
+       Interrupt tests
+       
+       * commands/i386/pc/inttest.c: new file
+       * conf/i386-pc.rmk: new module inttest.mod
+
 2009-03-07  Bean  <address@hidden>
 
        * loader/i386/efi/linux.c (grub_rescue_cmd_initrd): Fix a bug in initrd
Index: commands/i386/pc/inttest.c
===================================================================
--- commands/i386/pc/inttest.c  (revision 0)
+++ commands/i386/pc/inttest.c  (revision 0)
@@ -0,0 +1,85 @@
+/* inttest.c - simple interrupt testing */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/normal.h>
+
+static grub_err_t
+grub_cmd_intreport (struct grub_arg_list *state __attribute__ ((unused)),
+                   int argc __attribute__ ((unused)),
+                   char **args __attribute__ ((unused)))
+{
+  grub_uint32_t *vects = 0;
+  int i;
+  for (i = 0; i < 0x100; i++)
+    if(((vects[i] >> 16) + ((vects[i] & 0xffff) >> 4)) >= 0xc000)
+      grub_printf("int %xh in BIOS %x:%x\n",
+                 i, vects[i]>>16, vects[i]&0xffff);
+    else
+      grub_printf("int %xh not in BIOS %x:%x\n",
+                 i, vects[i]>>16, vects[i]&0xffff);
+  return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_cmd_inttest (struct grub_arg_list *state __attribute__ ((unused)),
+                 int argc __attribute__ ((unused)),
+                 char **args __attribute__ ((unused)))
+{
+  grub_uint32_t *vects = 0;
+  int i;
+  for (i = 0; i <= 0x1c; i++)
+    if(((vects[i] >> 16) + ((vects[i] & 0xffff) >> 4)) < 0xc000)
+      return grub_error (GRUB_ERR_TEST_FAILURE, "interrupt %xh isn't in BIOS",
+                        i);
+  if(((vects[0x4a] >> 16) + ((vects[0x4a] & 0xffff) >> 4)) < 0xc000)
+    return grub_error (GRUB_ERR_TEST_FAILURE, "interrupt 4ah isn't in BIOS",
+                        i);
+  if(((vects[0x70] >> 16) + ((vects[0x70] & 0xffff) >> 4)) < 0xc000)
+    return grub_error (GRUB_ERR_TEST_FAILURE, "interrupt 70h isn't in BIOS",
+                        i);
+
+  return GRUB_ERR_NONE;  
+}
+
+GRUB_MOD_INIT(intreport)
+{
+  (void)mod;                   /* To stop warning. */
+  grub_register_command ("intreport", grub_cmd_intreport, 
+                        GRUB_COMMAND_FLAG_BOTH,
+                        "intreport", 
+                        "Report which interrupts are and which aren't in BIOS",
+                        0);
+  grub_register_command ("inttest", grub_cmd_inttest, 
+                        GRUB_COMMAND_FLAG_BOTH,
+                        "inttest", 
+                        "Test that commonly used interrupts are in BIOS",
+                        0);
+
+}
+
+GRUB_MOD_FINI(intreport)
+{
+  grub_unregister_command ("intreport");
+  grub_unregister_command ("inttest");
+}