Initial (manual) import

2017-01-22 20:26:44 +01:00
1 parent f39611c506
commit 895fe109de
@@ -0,0 +1,149 @@
+asm {
+#assert !((REGG_LOCAL_NON_PTR_VARS|REGG_LOCAL_VARS)&~0xFCC0)
+_TEST_EXCEPT::
+	XOR	RAX,RAX
+	MOV	RAX,FS:U64 CTask.last_except[RAX]
+	MOV	RBP,U64 CExcept.rbp[RAX]
+	MOV	RSI,U64 CExcept.rsi[RAX]
+	MOV	RDI,U64 CExcept.rdi[RAX]
+	MOV	R10,U64 CExcept.r10[RAX]
+	MOV	R11,U64 CExcept.r11[RAX]
+	MOV	R12,U64 CExcept.r12[RAX]
+	MOV	R13,U64 CExcept.r13[RAX]
+	MOV	R14,U64 CExcept.r14[RAX]
+	MOV	R15,U64 CExcept.r15[RAX]
+	PUSH	U64 CExcept.rflags[RAX]
+	POPFD
+	JMP	U64 CExcept.hndlr_catch[RAX]
+
+_TAKE_EXCEPT::
+	XOR	RAX,RAX
+	MOV	RAX,FS:U64 CTask.last_except[RAX]
+	MOV	RSP,U64 CExcept.rsp[RAX]
+	JMP	U64 CExcept.hndlr_untry[RAX]
+
+_SAVE_EXCEPT_REGS::
+	PUSH	RBP
+	MOV	RBP,RSP
+	MOV	RAX,U64 SF_ARG1[RBP]
+	MOV	U64 CExcept.rsi[RAX],RSI
+	MOV	U64 CExcept.rdi[RAX],RDI
+	MOV	U64 CExcept.r10[RAX],R10
+	MOV	U64 CExcept.r11[RAX],R11
+	MOV	U64 CExcept.r12[RAX],R12
+	MOV	U64 CExcept.r13[RAX],R13
+	MOV	U64 CExcept.r14[RAX],R14
+	MOV	U64 CExcept.r15[RAX],R15
+	POP	RBP
+	RET1	8
+}
+
+_extern _TEST_EXCEPT U0 TestExcept();
+_extern _TAKE_EXCEPT U0 TakeExcept();
+_extern _SAVE_EXCEPT_REGS U0 SaveExceptRegs(CExcept *t);
+
+U0 PutExcept(Bool catch_it=TRUE)
+{//Print exception msg and catch exception.
+  "Except:%c:",Fs->except_ch;
+  "%P:%P:%P:%P:%P:%P\n",Fs->except_callers[0],Fs->except_callers[1],
+	Fs->except_callers[2],Fs->except_callers[3],Fs->except_callers[4],
+	Fs->except_callers[5],Fs->except_callers[6],Fs->except_callers[7];
+  Fs->catch_except=catch_it;
+}
+
+#exe {Option(OPTf_NO_REG_VAR,ON);};
+
+class CTryStk
+{
+  I64 rbp;
+  I64 ret_rip;
+  I64 arg1;
+  I64 arg2;
+};
+
+U0 SysTry(U8 *catch_start,U8 *untry_start)
+{
+  I64 *rbp=GetRBP;
+  CExcept *tmpt=MAlloc(sizeof(CExcept));
+  tmpt->hndlr_catch=catch_start;
+  tmpt->hndlr_untry=untry_start;
+  tmpt->rsp=rbp(U8 *)+sizeof(CTryStk);
+  tmpt->rbp=*rbp;
+  tmpt->rflags=GetRFlags;
+  SaveExceptRegs(tmpt);
+  QueIns(tmpt,Fs->last_except);
+}
+
+U0 SysUntry()
+{
+  CExcept *tmpt=Fs->last_except;
+  QueRem(tmpt);
+  Free(tmpt);
+}
+
+U0 throw(I64 ch=0,Bool no_log=FALSE)
+{//ch can be up to 8 chars like $LK,"PutChars",A="MN:PutChars"$().
+//In the catcher, fetch ch from Fs->except_ch.
+  CExcept *tmpt=Fs->last_except;
+  Bool was_raw;
+  I64 i;
+  Fs->except_ch=ch;
+  for (i=0;i<TASK_EXCEPT_CALLERS;i++)
+    Fs->except_callers[i]=Caller(i+1);
+  Fs->except_rbp=GetRBP;
+  Fs->catch_except=FALSE;
+  if (!no_log)
+    AdamLog("Except:%c:%p:%p:%p:%p:%p:%p\n",ch,Fs->except_callers[0],
+	  Fs->except_callers[1],Fs->except_callers[2],Fs->except_callers[3],
+	  Fs->except_callers[4],Fs->except_callers[5],Fs->except_callers[6],
+	  Fs->except_callers[7]);
+  while (Fs->next_except!=&Fs->next_except) {
+    TestExcept;
+    if (Fs->catch_except)
+      TakeExcept;
+    SetRBP(Fs->except_rbp);
+    tmpt=Fs->last_except;
+    QueRem(tmpt);
+    Free(tmpt);
+  }
+  was_raw=Raw(ON);
+  PutExcept(FALSE);
+  Panic("Unhandled Exception");
+  Raw(was_raw);
+}
+
+#exe {Option(OPTf_NO_REG_VAR,OFF);};
+
+U0 Break()
+{//Send <CTRL-ALT-c>.
+  if (Bt(&Fs->task_flags,TASKf_BREAK_TO_SHIFT_ESC))
+    Msg(MSG_KEY_DOWN,CH_SHIFT_ESC,0x20100000201);
+  else {
+    Fs->wake_jiffy=0;
+    TaskRstAwaitingMsg;
+    DrvsRelease();
+    BlkDevsRelease();
+    FlushMsgs;
+    throw('Break');
+  }
+}
+
+Bool BreakLock(CTask *task=NULL)
+{//Disables <CTRL-ALT-c>.
+  if (!task) task=Fs;
+  return !LBts(&task->task_flags,TASKf_BREAK_LOCKED);
+}
+
+Bool BreakUnlock(CTask *task=NULL)
+{//Reenables <CTRL-ALT-c> and issues any pending breaks.
+  Bool res;
+  if (!task) task=Fs;
+  res=LBtr(&task->task_flags,TASKf_BREAK_LOCKED);
+  if (LBtr(&task->task_flags,TASKf_PENDING_BREAK)) {
+    if (task==Fs)
+      Break;
+    else
+      task->rip=&Break;
+  }
+  return res;
+}