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 <phco...@gmail.com>
+
+ Interrupt tests
+
+ * commands/i386/pc/inttest.c: new file
+ * conf/i386-pc.rmk: new module inttest.mod
+
2009-03-07 Bean <bean12...@gmail.com>
* 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");
+}
_______________________________________________
Grub-devel mailing list
Grub-devel@gnu.org
http://lists.gnu.org/mailman/listinfo/grub-devel
