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/*++ @file
Since the SEC is the only program in our emulation we
must use a UEFI/PI mechanism to export APIs to other modules.
This is the role of the EFI_EMU_THUNK_PROTOCOL.
The mUnixThunkTable exists so that a change to EFI_EMU_THUNK_PROTOCOL
will cause an error in initializing the array if all the member functions
are not added. It looks like adding a element to end and not initializing
it may cause the table to be initaliized with the members at the end being
set to zero. This is bad as jumping to zero will crash.
Copyright (c) 2004 - 2009, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2008 - 2011, Apple Inc. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "SecMain.h"
#ifdef __APPLE__
#define DebugAssert _Mangle__DebugAssert
#include <assert.h>
#include <CoreServices/CoreServices.h>
#include <mach/mach.h>
#include <mach/mach_time.h>
#undef DebugAssert
#endif
int settimer_initialized;
struct timeval settimer_timeval;
void (*settimer_callback)(UINT64 delta);
BOOLEAN gEmulatorInterruptEnabled = FALSE;
UINTN
SecWriteStdErr (
IN UINT8 *Buffer,
IN UINTN NumberOfBytes
)
{
ssize_t Return;
Return = write (STDERR_FILENO, (const void *)Buffer, (size_t)NumberOfBytes);
return (Return == -1) ? 0 : Return;
}
EFI_STATUS
SecConfigStdIn (
VOID
)
{
struct termios tty;
//
// Need to turn off line buffering, ECHO, and make it unbuffered.
//
tcgetattr (STDIN_FILENO, &tty);
tty.c_lflag &= ~(ICANON | ECHO);
tcsetattr (STDIN_FILENO, TCSANOW, &tty);
// setvbuf (STDIN_FILENO, NULL, _IONBF, 0);
// now ioctl FIONREAD will do what we need
return EFI_SUCCESS;
}
UINTN
SecWriteStdOut (
IN UINT8 *Buffer,
IN UINTN NumberOfBytes
)
{
ssize_t Return;
Return = write (STDOUT_FILENO, (const void *)Buffer, (size_t)NumberOfBytes);
return (Return == -1) ? 0 : Return;
}
UINTN
SecReadStdIn (
IN UINT8 *Buffer,
IN UINTN NumberOfBytes
)
{
ssize_t Return;
Return = read (STDIN_FILENO, Buffer, (size_t)NumberOfBytes);
return (Return == -1) ? 0 : Return;
}
BOOLEAN
SecPollStdIn (
VOID
)
{
int Result;
int Bytes;
Result = ioctl (STDIN_FILENO, FIONREAD, &Bytes);
if (Result == -1) {
return FALSE;
}
return (BOOLEAN)(Bytes > 0);
}
VOID *
SecMalloc (
IN UINTN Size
)
{
return malloc ((size_t)Size);
}
VOID
SecFree (
IN VOID *Ptr
)
{
free (Ptr);
return;
}
void
settimer_handler (int sig)
{
struct timeval timeval;
UINT64 delta;
gettimeofday (&timeval, NULL);
delta = ((UINT64)timeval.tv_sec * 1000) + (timeval.tv_usec / 1000)
- ((UINT64)settimer_timeval.tv_sec * 1000)
- (settimer_timeval.tv_usec / 1000);
settimer_timeval = timeval;
if (settimer_callback) {
ReverseGasketUint64 (settimer_callback, delta);
}
}
VOID
SecSetTimer (
IN UINT64 PeriodMs,
IN EMU_SET_TIMER_CALLBACK CallBack
)
{
struct itimerval timerval;
UINT32 remainder;
if (!settimer_initialized) {
struct sigaction act;
settimer_initialized = 1;
act.sa_handler = settimer_handler;
act.sa_flags = 0;
sigemptyset (&act.sa_mask);
gEmulatorInterruptEnabled = TRUE;
if (sigaction (SIGALRM, &act, NULL) != 0) {
printf ("SetTimer: sigaction error %s\n", strerror (errno));
}
if (gettimeofday (&settimer_timeval, NULL) != 0) {
printf ("SetTimer: gettimeofday error %s\n", strerror (errno));
}
}
timerval.it_value.tv_sec = DivU64x32(PeriodMs, 1000);
DivU64x32Remainder(PeriodMs, 1000, &remainder);
timerval.it_value.tv_usec = remainder * 1000;
timerval.it_value.tv_sec = DivU64x32(PeriodMs, 1000);
timerval.it_interval = timerval.it_value;
if (setitimer (ITIMER_REAL, &timerval, NULL) != 0) {
printf ("SetTimer: setitimer error %s\n", strerror (errno));
}
settimer_callback = CallBack;
}
VOID
SecEnableInterrupt (
VOID
)
{
sigset_t sigset;
gEmulatorInterruptEnabled = TRUE;
// Since SetTimer() uses SIGALRM we emulate turning on and off interrupts
// by enabling/disabling SIGALRM.
sigemptyset (&sigset);
sigaddset (&sigset, SIGALRM);
pthread_sigmask (SIG_UNBLOCK, &sigset, NULL);
}
VOID
SecDisableInterrupt (
VOID
)
{
sigset_t sigset;
// Since SetTimer() uses SIGALRM we emulate turning on and off interrupts
// by enabling/disabling SIGALRM.
sigemptyset (&sigset);
sigaddset (&sigset, SIGALRM);
pthread_sigmask (SIG_BLOCK, &sigset, NULL);
gEmulatorInterruptEnabled = FALSE;
}
BOOLEAN
SecInterruptEanbled (void)
{
return gEmulatorInterruptEnabled;
}
UINT64
QueryPerformanceFrequency (
VOID
)
{
// Hard code to nanoseconds
return 1000000000ULL;
}
UINT64
QueryPerformanceCounter (
VOID
)
{
#if __APPLE__
UINT64 Start;
Nanoseconds elapsedNano;
Start = mach_absolute_time ();
// Convert to nanoseconds.
// Have to do some pointer fun because AbsoluteToNanoseconds
// works in terms of UnsignedWide, which is a structure rather
// than a proper 64-bit integer.
elapsedNano = AbsoluteToNanoseconds (*(AbsoluteTime *) &Start);
return *(uint64_t *) &elapsedNano;
#else
// Need to figure out what to do for Linux?
return 0;
#endif
}
VOID
SecSleep (
IN UINT64 Nanoseconds
)
{
struct timespec rq, rm;
struct timeval start, end;
unsigned long MicroSec;
rq.tv_sec = DivU64x32 (Nanoseconds, 1000000000);
rq.tv_nsec = ModU64x32 (Nanoseconds, 1000000000);
//
// nanosleep gets interrupted by our timer tic.
// we need to track wall clock time or we will stall for way too long
//
gettimeofday (&start, NULL);
end.tv_sec = start.tv_sec + rq.tv_sec;
MicroSec = (start.tv_usec + rq.tv_nsec/1000);
end.tv_usec = MicroSec % 1000000;
if (MicroSec > 1000000) {
end.tv_sec++;
}
while (nanosleep (&rq, &rm) == -1) {
if (errno != EINTR) {
break;
}
gettimeofday (&start, NULL);
if (start.tv_sec > end.tv_sec) {
break;
} if ((start.tv_sec == end.tv_sec) && (start.tv_usec > end.tv_usec)) {
break;
}
rq = rm;
}
}
VOID
SecCpuSleep (
VOID
)
{
struct timespec rq, rm;
// nanosleep gets interrupted by the timer tic
rq.tv_sec = 1;
rq.tv_nsec = 0;
nanosleep (&rq, &rm);
}
VOID
SecExit (
UINTN Status
)
{
exit (Status);
}
VOID
SecGetTime (
OUT EFI_TIME *Time,
OUT EFI_TIME_CAPABILITIES *Capabilities OPTIONAL
)
{
struct tm *tm;
time_t t;
t = time (NULL);
tm = localtime (&t);
Time->Year = 1900 + tm->tm_year;
Time->Month = tm->tm_mon + 1;
Time->Day = tm->tm_mday;
Time->Hour = tm->tm_hour;
Time->Minute = tm->tm_min;
Time->Second = tm->tm_sec;
Time->Nanosecond = 0;
Time->TimeZone = timezone;
Time->Daylight = (daylight ? EFI_TIME_ADJUST_DAYLIGHT : 0)
| (tm->tm_isdst > 0 ? EFI_TIME_IN_DAYLIGHT : 0);
if (Capabilities != NULL) {
Capabilities->Resolution = 1;
Capabilities->Accuracy = 50000000;
Capabilities->SetsToZero = FALSE;
}
}
VOID
SecSetTime (
IN EFI_TIME *Time
)
{
// Don't change the time on the system
// We could save delta to localtime() and have SecGetTime adjust return values?
return;
}
EFI_STATUS
SecGetNextProtocol (
IN BOOLEAN EmuBusDriver,
OUT EMU_IO_THUNK_PROTOCOL **Instance OPTIONAL
)
{
return GetNextThunkProtocol (EmuBusDriver, Instance);
}
EMU_THUNK_PROTOCOL gEmuThunkProtocol = {
GasketSecWriteStdErr,
GasketSecConfigStdIn,
GasketSecWriteStdOut,
GasketSecReadStdIn,
GasketSecPollStdIn,
GasketSecMalloc,
GasketSecFree,
GasketSecPeCoffGetEntryPoint,
GasketSecPeCoffRelocateImageExtraAction,
GasketSecPeCoffUnloadImageExtraAction,
GasketSecEnableInterrupt,
GasketSecDisableInterrupt,
GasketQueryPerformanceFrequency,
GasketQueryPerformanceCounter,
GasketSecSleep,
GasketSecCpuSleep,
GasketSecExit,
GasketSecGetTime,
GasketSecSetTime,
GasketSecSetTimer,
GasketSecGetNextProtocol
};
VOID
SecInitThunkProtocol (
VOID
)
{
// timezone and daylight lib globals depend on tzset be called 1st.
tzset ();
}
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