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/*
Derived from source code of TrueCrypt 7.1a, which is
Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
by the TrueCrypt License 3.0.
Modifications and additions to the original source code (contained in this file)
and all other portions of this file are Copyright (c) 2013-2017 IDRIX
and are governed by the Apache License 2.0 the full text of which is
contained in the file License.txt included in VeraCrypt binary and source
code distribution packages.
*/
#include "Platform.h"
#include "Bios.h"
#include "BootConsoleIo.h"
#include "BootDefs.h"
#include "BootDiskIo.h"
#include "BootDebug.h"
#ifdef TC_BOOT_TRACING_ENABLED
void InitDebugPort ()
{
__asm
{
mov dx, TC_DEBUG_PORT
mov ah, 1
int 0x17
mov dx, TC_DEBUG_PORT
mov ah, 0xe2
int 0x17
}
}
void WriteDebugPort (byte dataByte)
{
__asm
{
mov al, dataByte
mov dx, TC_DEBUG_PORT
mov ah, 0
int 0x17
}
}
#endif // TC_BOOT_TRACING_ENABLED
#ifdef TC_BOOT_DEBUG_ENABLED
extern "C" void PrintDebug (uint32 debugVal)
{
Print (debugVal);
PrintEndl();
}
void PrintVal (const char *message, const uint32 value, bool newLine, bool hex)
{
Print (message);
Print (": ");
if (hex)
PrintHex (value);
else
Print (value);
if (newLine)
PrintEndl();
}
void PrintVal (const char *message, const uint64 &value, bool newLine, bool hex)
{
Print (message);
Print (": ");
PrintHex (value);
if (newLine)
PrintEndl();
}
void PrintHexDump (byte *mem, size_t size, uint16 *memSegment)
{
const size_t width = 16;
for (size_t pos = 0; pos < size; )
{
for (int pass = 1; pass <= 2; ++pass)
{
size_t i;
for (i = 0; i < width && pos < size; ++i)
{
byte dataByte;
if (memSegment)
{
__asm
{
push es
mov si, ss:memSegment
mov es, ss:[si]
mov si, ss:mem
add si, pos
mov al, es:[si]
mov dataByte, al
pop es
}
pos++;
}
else
dataByte = mem[pos++];
if (pass == 1)
{
PrintHex (dataByte);
PrintChar (' ');
}
else
PrintChar (IsPrintable (dataByte) ? dataByte : '.');
}
if (pass == 1)
{
pos -= i;
PrintChar (' ');
}
}
PrintEndl ();
}
}
void PrintHexDump (uint16 memSegment, uint16 memOffset, size_t size)
{
PrintHexDump ((byte *) memOffset, size, &memSegment);
}
#endif // TC_BOOT_DEBUG_ENABLED
#ifdef TC_BOOT_STACK_CHECKING_ENABLED
extern "C" char end[];
static void PrintStackInfo ()
{
uint16 spReg;
__asm mov spReg, sp
Print ("Stack: "); Print (TC_BOOT_LOADER_STACK_TOP - spReg);
Print ("/"); Print (TC_BOOT_LOADER_STACK_TOP - (uint16) end);
}
void CheckStack ()
{
uint16 spReg;
__asm mov spReg, sp
if (*(uint32 *) end != 0x12345678UL || spReg < (uint16) end)
{
__asm cli
__asm mov sp, TC_BOOT_LOADER_STACK_TOP
PrintError ("Stack overflow");
TC_THROW_FATAL_EXCEPTION;
}
}
void InitStackChecker ()
{
*(uint32 *) end = 0x12345678UL;
PrintStackInfo();
PrintEndl();
}
#endif // TC_BOOT_STACK_CHECKING_ENABLED
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