svn commit: r197475 - head/sys/compat/x86bios

[Jung-uk Kim]

Author: jkim
Date: Thu Sep 24 22:42:35 2009
New Revision: 197475
URL: http://svn.freebsd.org/changeset/base/197475

Log:
  Dump real mode registers under bootverbose to help debugging BIOS emulator.

Modified:
  head/sys/compat/x86bios/x86bios.c

Modified: head/sys/compat/x86bios/x86bios.c
==============================================================================
--- head/sys/compat/x86bios/x86bios.c	Thu Sep 24 21:35:13 2009	(r197474)
+++ head/sys/compat/x86bios/x86bios.c	Thu Sep 24 22:42:35 2009	(r197475)
@@ -97,6 +97,11 @@ x86bios_intr(struct x86regs *regs, int i
 	if (intno < 0 || intno > 255)
 		return;
 
+	if (bootverbose)
+		printf("Calling real mode int 0x%x "
+		    "(ax=0x%04x bx=0x%04x cx=0x%04x dx=0x%04x)\n",
+		    intno, regs->R_AX, regs->R_BX, regs->R_CX, regs->R_DX);
+
 	mtx_lock_spin(&x86bios_lock);
 
 	memcpy(&x86bios_emu.x86, regs, sizeof(*regs));
@@ -104,6 +109,11 @@ x86bios_intr(struct x86regs *regs, int i
 	memcpy(regs, &x86bios_emu.x86, sizeof(*regs));
 
 	mtx_unlock_spin(&x86bios_lock);
+
+	if (bootverbose)
+		printf("Exiting real mode int 0x%x "
+		    "(ax=0x%04x bx=0x%04x cx=0x%04x dx=0x%04x)\n",
+		    intno, regs->R_AX, regs->R_BX, regs->R_CX, regs->R_DX);
 }
 
 void *