ref: 600bbfe4aaa9ad0f73d8d73eef1b7670e5f7d3a3
dir: /emu/Nt/ie-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"
#include "ieplugin.h"
extern int SYS_SLEEP = 2;
extern int SOCK_SELECT = 3;
#define MAXSLEEPERS 1500
extern Plugin* plugin;
extern void newiop();
extern int sendiop();
DWORD PlatformId;
static char* path;
static HANDLE kbdh = INVALID_HANDLE_VALUE;
static HANDLE conh = INVALID_HANDLE_VALUE;
static int sleepers;
static ulong erendezvous(void*, ulong);
__declspec(thread) Proc *up;
HANDLE ntfd2h(int);
int nth2fd(HANDLE);
char *hosttype = "Nt";
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);
free(p);
}
void
osblock(void)
{
erendezvous(up, 0);
}
void
osready(Proc *p)
{
erendezvous(p, 0);
}
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)
{
// install our own exception handler
// replacing all others installed on this thread
DWORD handler = (DWORD)Exhandler;
_asm {
mov eax,handler
push eax
mov eax,-1
push eax
mov fs:[0],esp
}
up = p;
up->func(up->arg);
pexit("", 0);
// should never get here but tidy up anyway
_asm {
mov fs:[0],-1
add esp, 8
}
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");
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(plugin->conin, buf, sizeof(buf), &r, 0) == FALSE)
panic("keyboard fail");
if (r == 0)
panic("keyboard EOF");
if(buf[0] == '\r')
buf[0] = '\n';
return buf[0];
}
void
cleanexit(int x)
{
newiop();
IOP.op = Iquit;
sendiop();
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, "SingleStep",
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
};
void
dodisfault(void)
{
disfault(nil, up->env->errstr);
}
typedef struct Ereg Ereg;
struct Ereg {
Ereg *prev;
FARPROC handler;
};
void
dumpex()
{
Ereg *er;
int i;
_asm { mov eax,fs:[0] };
_asm { mov [er],eax };
i = 0;
while ((unsigned)er != ~0) {
print("handler %ux\n", er->handler);
i++;
er = er->prev;
}
print("EXCEPTION CHAIN LENGTH = %d\n", i);
}
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), "Unrecognized Machine Trap (%.8lux)\n", code);
name = buf;
}
/*
if(pc != 0) {
snprint(buf, sizeof(buf), "%s: pc=0x%lux", name, pc);
name = buf;
}
*/
/* YUCK! */
strncpy(up->env->errstr, name, ERRMAX);
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 register stack */
_asm { fnclex };
ureg->ContextRecord->FloatSave.StatusWord = 0x0000;
ureg->ContextRecord->FloatSave.TagWord = 0xffff;
}
ureg->ContextRecord->Eip = (DWORD)dodisfault;
return EXCEPTION_CONTINUE_EXECUTION;
}
static int rebootok = 0; /* is shutdown -r supported? */
void
osreboot(char *file, char **argv)
{
if(rebootok){
execvp(file, argv);
panic("reboot failure");
}else
error("reboot option not supported on this system");
}
void
libinit(char *imod)
{
WSADATA wasdat;
// DWORD lasterror, namelen;
OSVERSIONINFO os;
// char sys[64];
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;
}
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);
kstrdup(&ossysname, "plugin");
// 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");
kstrdup(&eve, "system");
emuinit(imod);
}
enum
{
NHLOG = 7,
NHASH = (1<<NHLOG)
};
typedef struct Tag Tag;
struct Tag
{
void* tag;
ulong val;
HANDLE pid;
Tag* next;
};
static Tag* ht[NHASH];
static Tag* ft;
static Lock hlock;
static int nsema;
ulong
erendezvous(void *tag, ulong value)
{
int h;
ulong rval;
Tag *t, **l, *f;
h = (ulong)tag & (NHASH-1);
lock(&hlock);
l = &ht[h];
for(t = ht[h]; t; t = t->next) {
if(t->tag == tag) {
rval = t->val;
t->val = value;
t->tag = 0;
unlock(&hlock);
if(SetEvent(t->pid) == FALSE)
panic("Release failed\n");
return rval;
}
}
t = ft;
if(t == 0) {
t = malloc(sizeof(Tag));
if(t == nil)
panic("rendezvous: no memory");
t->pid = CreateEvent(0, 0, 0, 0);
}
else
ft = t->next;
t->tag = tag;
t->val = value;
t->next = *l;
*l = t;
unlock(&hlock);
if(WaitForSingleObject(t->pid, INFINITE) != WAIT_OBJECT_0)
panic("WaitForSingleObject failed\n");
lock(&hlock);
rval = t->val;
for(f = *l; f; f = f->next) {
if(f == t) {
*l = f->next;
break;
}
l = &f->next;
}
t->next = ft;
ft = t;
unlock(&hlock);
return rval;
}
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)
CloseHandle(ntfd2h(fd));
return 0;
}
int
read(int fd, void *buf, uint n)
{
if(!ReadFile(ntfd2h(fd), buf, n, &n, NULL))
return -1;
return n;
}
int
write(int fd, void *buf, uint n)
{
if(fd == 1 || fd == 2){
int w;
if (plugin->conout == NULL)
return n;
if (!WriteFile(plugin->conout, buf, n, &w, NULL) || n != w)
abort();
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;
}
/*
ulong
getpc(void *arg, ulong *narg)
{
ulong *a = arg, *fp, pc;
if(a == nil){
*narg = 0;
return 0;
}
fp = a-2;
pc = fp[1];
fp = *(ulong**)fp;
if(fp == nil)
*narg = 0;
else
*narg = (ulong)(fp+2);
return pc;
}
*/
/*
* 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)
{
up->syscall = 1;
SleepEx(milsec, FALSE);
up->syscall = 0;
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)
{
sleep(0);
}
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;
}