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bootloader/bios: Add tracing of real-mode bios interrupt calls

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Alexander von Gluck IV 2017-05-24 08:18:54 -05:00
parent 9d9f76edff
commit d8219f96da
1 changed files with 18 additions and 1 deletions
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19
src/system/boot/platform/bios_ia32/bios.cpp
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@ -1,22 +1,39 @@
/*
* Copyright 2011, Ingo Weinhold, ingo_weinhold@gmx.de.
* Copyright 2012-2017, Haiku, Inc. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#include "bios.h"
#include <KernelExport.h>
#include "interrupts.h"
//#define TRACE_BIOS
#ifdef TRACE_BIOS
# define TRACE(x) dprintf x
#else
# define TRACE(x) ;
#endif
extern "C" void call_bios_internal(uint8 num, struct bios_regs* regs);
void
call_bios(uint8 num, struct bios_regs* regs)
{
TRACE(("BIOS(%" B_PRIx8 "h): Restore BIOS IDT\n", num));
restore_bios_idt();
TRACE(("BIOS(%" B_PRIx8 "h): eax: 0x%" B_PRIx32 ", ebx: 0x%" B_PRIx32 ", "
"ecx: 0x%" B_PRIx32 ", edx: 0x%" B_PRIx32 ", esi: 0x%" B_PRIx32 ", "
"edi: 0x%" B_PRIx32 ", es: 0x%" B_PRIx16 ", flags: 0x%" B_PRIx8 "\n",
num, regs->eax, regs->ebx, regs->ecx, regs->edx, regs->esi, regs->edi,
regs->es, regs->flags));
call_bios_internal(num, regs);
TRACE(("BIOS(%" B_PRIx8 "h): Set debug BIOS IDT\n", num));
set_debug_idt();
}