ref: 7975eec3e602fd5bc3e93c78f4166259190f2fe9
dir: /emu/Nt/os.c/
#define Unknown win_Unknown
#define UNICODE
#include <windows.h>
#include <winbase.h>
#include <winsock.h>
#undef Unknown
#include <excpt.h>
#include "dat.h"
#include "fns.h"
#include "error.h"
#include "r16.h"
int SYS_SLEEP = 2;
int SOCK_SELECT = 3;
#define MAXSLEEPERS 1500
extern int cflag;
DWORD PlatformId;
DWORD consolestate;
static char* path;
static HANDLE kbdh = INVALID_HANDLE_VALUE;
static HANDLE conh = INVALID_HANDLE_VALUE;
static HANDLE errh = INVALID_HANDLE_VALUE;
static int donetermset = 0;
static int sleepers = 0;
__declspec(thread) Proc *up;
HANDLE ntfd2h(int);
int nth2fd(HANDLE);
void termrestore(void);
char *hosttype = "Nt";
char *cputype = "386";
void (*coherence)(void) = nofence;
static void
pfree(Proc *p)
{
Osenv *e;
lock(&procs.l);
if(p->prev)
p->prev->next = p->next;
else
procs.head = p->next;
if(p->next)
p->next->prev = p->prev;
else
procs.tail = p->prev;
unlock(&procs.l);
e = p->env;
if(e != nil) {
closefgrp(e->fgrp);
closepgrp(e->pgrp);
closeegrp(e->egrp);
closesigs(e->sigs);
}
free(e->user);
free(p->prog);
CloseHandle((HANDLE)p->os);
free(p);
}
void
osblock(void)
{
if(WaitForSingleObject((HANDLE)up->os, INFINITE) != WAIT_OBJECT_0)
panic("osblock failed");
}
void
osready(Proc *p)
{
if(SetEvent((HANDLE)p->os) == FALSE)
panic("osready failed");
}
void
pexit(char *msg, int t)
{
pfree(up);
ExitThread(0);
}
LONG TrapHandler(LPEXCEPTION_POINTERS ureg);
__cdecl
Exhandler(EXCEPTION_RECORD *rec, void *frame, CONTEXT *context, void *dcon)
{
EXCEPTION_POINTERS ep;
ep.ExceptionRecord = rec;
ep.ContextRecord = context;
TrapHandler(&ep);
return ExceptionContinueExecution;
}
DWORD WINAPI
tramp(LPVOID p)
{
up = p;
up->func(up->arg);
pexit("", 0);
/* not reached */
for(;;)
panic("tramp");
return 0;
}
void
kproc(char *name, void (*func)(void*), void *arg, int flags)
{
DWORD h;
Proc *p;
Pgrp *pg;
Fgrp *fg;
Egrp *eg;
p = newproc();
if(p == nil)
panic("out of kernel processes");
p->os = CreateEvent(NULL, FALSE, FALSE, NULL);
if(p->os == NULL)
panic("can't allocate os event");
if(flags & KPDUPPG) {
pg = up->env->pgrp;
incref(&pg->r);
p->env->pgrp = pg;
}
if(flags & KPDUPFDG) {
fg = up->env->fgrp;
incref(&fg->r);
p->env->fgrp = fg;
}
if(flags & KPDUPENVG) {
eg = up->env->egrp;
incref(&eg->r);
p->env->egrp = eg;
}
p->env->ui = up->env->ui;
kstrdup(&p->env->user, up->env->user);
strcpy(p->text, name);
p->func = func;
p->arg = arg;
lock(&procs.l);
if(procs.tail != nil) {
p->prev = procs.tail;
procs.tail->next = p;
}
else {
procs.head = p;
p->prev = nil;
}
procs.tail = p;
unlock(&procs.l);
p->pid = (int)CreateThread(0, 16384, tramp, p, 0, &h);
if(p->pid <= 0)
panic("ran out of kernel processes");
}
#if(_WIN32_WINNT >= 0x0400)
void APIENTRY sleepintr(DWORD param)
{
}
#endif
void
oshostintr(Proc *p)
{
if (p->syscall == SOCK_SELECT)
return;
p->intwait = 0;
#if(_WIN32_WINNT >= 0x0400)
if(p->syscall == SYS_SLEEP) {
QueueUserAPC(sleepintr, (HANDLE) p->pid, (DWORD) p->pid);
}
#endif
}
void
oslongjmp(void *regs, osjmpbuf env, int val)
{
USED(regs);
longjmp(env, val);
}
int
readkbd(void)
{
DWORD r;
char buf[1];
if(ReadFile(kbdh, buf, sizeof(buf), &r, 0) == FALSE)
panic("keyboard fail");
if (r == 0)
panic("keyboard EOF");
if (buf[0] == 0x03) {
// INTR (CTRL+C)
termrestore();
ExitProcess(0);
}
if(buf[0] == '\r')
buf[0] = '\n';
return buf[0];
}
void
cleanexit(int x)
{
sleep(2); /* give user a chance to see message */
termrestore();
ExitProcess(x);
}
struct ecodes {
DWORD code;
char* name;
} ecodes[] = {
EXCEPTION_ACCESS_VIOLATION, "segmentation violation",
EXCEPTION_DATATYPE_MISALIGNMENT, "data alignment",
EXCEPTION_BREAKPOINT, "breakpoint",
EXCEPTION_SINGLE_STEP, "single step",
EXCEPTION_ARRAY_BOUNDS_EXCEEDED, "array bounds check",
EXCEPTION_FLT_DENORMAL_OPERAND, "denormalized float",
EXCEPTION_FLT_DIVIDE_BY_ZERO, "floating point divide by zero",
EXCEPTION_FLT_INEXACT_RESULT, "inexact floating point",
EXCEPTION_FLT_INVALID_OPERATION, "invalid floating operation",
EXCEPTION_FLT_OVERFLOW, "floating point result overflow",
EXCEPTION_FLT_STACK_CHECK, "floating point stack check",
EXCEPTION_FLT_UNDERFLOW, "floating point result underflow",
EXCEPTION_INT_DIVIDE_BY_ZERO, "divide by zero",
EXCEPTION_INT_OVERFLOW, "integer overflow",
EXCEPTION_PRIV_INSTRUCTION, "privileged instruction",
EXCEPTION_IN_PAGE_ERROR, "page-in error",
EXCEPTION_ILLEGAL_INSTRUCTION, "illegal instruction",
EXCEPTION_NONCONTINUABLE_EXCEPTION, "non-continuable exception",
EXCEPTION_STACK_OVERFLOW, "stack overflow",
EXCEPTION_INVALID_DISPOSITION, "invalid disposition",
EXCEPTION_GUARD_PAGE, "guard page violation",
0, nil
};
LONG
TrapHandler(LPEXCEPTION_POINTERS ureg)
{
int i;
char *name;
DWORD code;
// WORD pc;
char buf[ERRMAX];
code = ureg->ExceptionRecord->ExceptionCode;
// pc = ureg->ContextRecord->Eip;
name = nil;
for(i = 0; i < nelem(ecodes); i++) {
if(ecodes[i].code == code) {
name = ecodes[i].name;
break;
}
}
if(name == nil) {
snprint(buf, sizeof(buf), "unknown trap type (%#.8lux)\n", code);
name = buf;
}
/*
if(pc != 0) {
snprint(buf, sizeof(buf), "%s: pc=0x%lux", name, pc);
name = buf;
}
*/
switch (code) {
case EXCEPTION_FLT_DENORMAL_OPERAND:
case EXCEPTION_FLT_DIVIDE_BY_ZERO:
case EXCEPTION_FLT_INEXACT_RESULT:
case EXCEPTION_FLT_INVALID_OPERATION:
case EXCEPTION_FLT_OVERFLOW:
case EXCEPTION_FLT_STACK_CHECK:
case EXCEPTION_FLT_UNDERFLOW:
/* clear exception flags and ensure safe empty state */
_asm { fnclex };
_asm { fninit };
}
disfault(nil, name);
/* not reached */
return EXCEPTION_CONTINUE_EXECUTION;
}
static void
termset(void)
{
DWORD flag;
if(donetermset)
return;
donetermset = 1;
conh = GetStdHandle(STD_OUTPUT_HANDLE);
kbdh = GetStdHandle(STD_INPUT_HANDLE);
errh = GetStdHandle(STD_ERROR_HANDLE);
if(errh == INVALID_HANDLE_VALUE)
errh = conh;
// The following will fail if kbdh not from console (e.g. a pipe)
// in which case we don't care
GetConsoleMode(kbdh, &consolestate);
flag = consolestate;
flag = flag & ~(ENABLE_PROCESSED_INPUT|ENABLE_LINE_INPUT|ENABLE_ECHO_INPUT);
SetConsoleMode(kbdh, flag);
}
void
termrestore(void)
{
if(kbdh != INVALID_HANDLE_VALUE)
SetConsoleMode(kbdh, consolestate);
}
static int rebootok = 0; /* is shutdown -r supported? */
void
osreboot(char *file, char **argv)
{
if(rebootok){
termrestore();
execvp(file, argv);
panic("reboot failure");
}
}
void
libinit(char *imod)
{
WSADATA wasdat;
DWORD lasterror, namelen;
OSVERSIONINFO os;
char sys[64], uname[64];
wchar_t wuname[64];
char *uns;
os.dwOSVersionInfoSize = sizeof(os);
if(!GetVersionEx(&os))
panic("can't get os version");
PlatformId = os.dwPlatformId;
if (PlatformId == VER_PLATFORM_WIN32_NT) { /* true for NT and 2000 */
rebootok = 1;
} else {
rebootok = 0;
}
termset();
if((int)INVALID_HANDLE_VALUE != -1 || sizeof(HANDLE) != sizeof(int))
panic("invalid handle value or size");
if(WSAStartup(MAKEWORD(1, 1), &wasdat) != 0)
panic("no winsock.dll");
gethostname(sys, sizeof(sys));
kstrdup(&ossysname, sys);
if(sflag == 0)
SetUnhandledExceptionFilter((LPTOP_LEVEL_EXCEPTION_FILTER)TrapHandler);
path = getenv("PATH");
if(path == nil)
path = ".";
up = newproc();
if(up == nil)
panic("cannot create kernel process");
strcpy(uname, "inferno");
namelen = sizeof(wuname);
if(GetUserName(wuname, &namelen) != TRUE) {
lasterror = GetLastError();
if(PlatformId == VER_PLATFORM_WIN32_NT || lasterror != ERROR_NOT_LOGGED_ON)
print("cannot GetUserName: %d\n", lasterror);
}else{
uns = narrowen(wuname);
snprint(uname, sizeof(uname), "%s", uns);
free(uns);
}
kstrdup(&eve, uname);
emuinit(imod);
}
void
FPsave(void *fptr)
{
_asm {
mov eax, fptr
fstenv [eax]
}
}
void
FPrestore(void *fptr)
{
_asm {
mov eax, fptr
fldenv [eax]
}
}
ulong
umult(ulong a, ulong b, ulong *high)
{
ulong lo, hi;
_asm {
mov eax, a
mov ecx, b
MUL ecx
mov lo, eax
mov hi, edx
}
*high = hi;
return lo;
}
int
close(int fd)
{
if(fd == -1)
return 0;
CloseHandle(ntfd2h(fd));
return 0;
}
int
read(int fd, void *buf, uint n)
{
HANDLE h;
if(fd == 0)
h = kbdh;
else
h = ntfd2h(fd);
if(h == INVALID_HANDLE_VALUE)
return -1;
if(!ReadFile(h, buf, n, &n, NULL))
return -1;
return n;
}
int
write(int fd, void *buf, uint n)
{
HANDLE h;
if(fd == 1 || fd == 2){
if(!donetermset)
termset();
if(fd == 1)
h = conh;
else
h = errh;
if(h == INVALID_HANDLE_VALUE)
return -1;
if(!WriteFile(h, buf, n, &n, NULL))
return -1;
return n;
}
if(!WriteFile(ntfd2h(fd), buf, n, &n, NULL))
return -1;
return n;
}
/*
* map handles and fds.
* this code assumes sizeof(HANDLE) == sizeof(int),
* that INVALID_HANDLE_VALUE is -1, and assumes
* that all tests of invalid fds check only for -1, not < 0
*/
int
nth2fd(HANDLE h)
{
return (int)h;
}
HANDLE
ntfd2h(int fd)
{
return (HANDLE)fd;
}
void
oslopri(void)
{
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_BELOW_NORMAL);
}
/* Resolve system header name conflict */
#undef Sleep
void
sleep(int secs)
{
Sleep(secs*1000);
}
void*
sbrk(int size)
{
void *brk;
brk = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
if(brk == 0)
return (void*)-1;
return brk;
}
ulong
getcallerpc(void *arg)
{
ulong cpc;
_asm {
mov eax, dword ptr [ebp]
mov eax, dword ptr [eax+4]
mov dword ptr cpc, eax
}
return cpc;
}
/*
* Return an abitrary millisecond clock time
*/
long
osmillisec(void)
{
return GetTickCount();
}
#define SEC2MIN 60L
#define SEC2HOUR (60L*SEC2MIN)
#define SEC2DAY (24L*SEC2HOUR)
/*
* days per month plus days/year
*/
static int dmsize[] =
{
365, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
static int ldmsize[] =
{
366, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
/*
* return the days/month for the given year
*/
static int*
yrsize(int yr)
{
/* a leap year is a multiple of 4, excluding centuries
* that are not multiples of 400 */
if( (yr % 4 == 0) && (yr % 100 != 0 || yr % 400 == 0) )
return ldmsize;
else
return dmsize;
}
static long
tm2sec(SYSTEMTIME *tm)
{
long secs;
int i, *d2m;
secs = 0;
/*
* seconds per year
*/
for(i = 1970; i < tm->wYear; i++){
d2m = yrsize(i);
secs += d2m[0] * SEC2DAY;
}
/*
* seconds per month
*/
d2m = yrsize(tm->wYear);
for(i = 1; i < tm->wMonth; i++)
secs += d2m[i] * SEC2DAY;
/*
* secs in last month
*/
secs += (tm->wDay-1) * SEC2DAY;
/*
* hours, minutes, seconds
*/
secs += tm->wHour * SEC2HOUR;
secs += tm->wMinute * SEC2MIN;
secs += tm->wSecond;
return secs;
}
/*
* Return the time since the epoch in microseconds
* The epoch is defined at 1 Jan 1970
*/
vlong
osusectime(void)
{
SYSTEMTIME tm;
vlong secs;
GetSystemTime(&tm);
secs = tm2sec(&tm);
return secs * 1000000 + tm.wMilliseconds * 1000;
}
vlong
osnsec(void)
{
return osusectime()*1000; /* TO DO better */
}
int
osmillisleep(ulong milsec)
{
SleepEx(milsec, FALSE);
return 0;
}
int
limbosleep(ulong milsec)
{
if (sleepers > MAXSLEEPERS)
return -1;
sleepers++;
up->syscall = SYS_SLEEP;
SleepEx(milsec, TRUE);
up->syscall = 0;
sleepers--;
return 0;
}
void
osyield(void)
{
SwitchToThread();
}
void
ospause(void)
{
for(;;)
sleep(1000000);
}
/*
* these should never be called, and are included
* as stubs since we are linking against a library which defines them
*/
int
open(const char *path, int how, ...)
{
panic("open");
return -1;
}
int
creat(const char *path, int how)
{
panic("creat");
return -1;
}
int
stat(const char *path, struct stat *sp)
{
panic("stat");
return -1;
}
int
chown(const char *path, int uid, int gid)
{
panic("chown");
return -1;
}
int
chmod(const char *path, int mode)
{
panic("chmod");
return -1;
}
void
link(char *path, char *next)
{
panic("link");
}
int
segflush(void *a, ulong n)
{
return 0;
}