sesl_tcl.c

一个用在mips体系结构中的操作系统

/*
 * Copyright (C) 1996-1998 by the Board of Trustees
 *    of Leland Stanford Junior University.
 * 
 * This file is part of the SimOS distribution. 
 * See LICENSE file for terms of the license. 
 *
 */

/* Tcl interface to symbol commands.
*/

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <netinet/in.h>
#include "tcl_init.h"
#include "cpu_interface.h"
#include "sesl_expr.h"
#include "sesl_lib.h"
#include "symfile.h"
#include "symbols.h"
#include "sim_error.h"
#include "symfile.h"

#define OK 0
#define ERROR 1
#define NO 2

static int symTclLoad(Tcl_Interp *interp, int argc, char *argv[]);
static int symTclRead(Tcl_Interp *interp, int argc, char *argv[]);
static int symTclType(Tcl_Interp *interp, int argc, char *argv[]);
static int symTclSet(Tcl_Interp *interp, int argc, char *argv[]);
static int symTclFind(Tcl_Interp *interp, int argc, char *argv[]);

extern int SymDeref(ParseInfo *pip);

static tclcmd symcmds[] = {
{   "load",      4, symTclLoad,       " load exeName path"},
{   "read",      3, symTclRead,       " read symexp"},
{   "set",       4, symTclSet,        " set symexp value"},
{   "type",      3, symTclType,       " type symexp"},
{   "find",      4, symTclFind,       " find execname addr"},
{   NULL,        0, NULL,             NULL}
};


static int readstr(Tcl_Interp *interp, ParseInfo *pip);


void SymInit(Tcl_Interp *interp)
{
   Tcl_CreateCommand(interp, "symbol", DispatchCmd, (ClientData) symcmds, NULL);
   SESL_Init(CPUPrint, CPUWarning, CPUError);
}

int symTclLoad(Tcl_Interp *interp, int argc, char *argv[])
{
    if (!SESL_LoadFile(argv[3], argv[2])) {
        return TCL_ERROR;
    }
   return TCL_OK;
}

/*
 *    symTclRead
 */

#ifdef SAME_ENDIAN
#define GET_VALUE(_pi, _var, _type) \
    if ((_pi).constant) { \
       _var = (_type)(_pi).value; \
    } else if ((_pi).internal) { \
       _var = *(_type *)(_pi).value; \
    } else { \
       if (!CPUVec.GetMemory || \
           CPUVec.GetMemory(CPUVec.CurrentCpuNum(), \
                            (_pi).value, sizeof(_type), (char*)&(_var)) \
           != SUCCESS) { \
          goto error; \
       } \
    }
#else
#define GET_VALUE(_pi, _var, _type) \
    if ((_pi).constant) { \
       _var = (_type)(_pi).value; \
    } else if ((_pi).internal) { \
       ASSERT (0); \
    } else { \
       if (!CPUVec.GetMemory || \
           CPUVec.GetMemory(CPUVec.CurrentCpuNum(), \
                            (_pi).value, sizeof(_type), (char*)&(_var)) \
           != SUCCESS) { \
          goto error; \
       } \
       if (sizeof(_type)==2) _var = BE2HO_2(_var); \
       if (sizeof(_type)==4) _var = BE2HO_4(_var); \
       if (sizeof(_type)==8) _var = BE2HO_8(_var); \
    }
#endif

int readstr(Tcl_Interp *interp, ParseInfo *pip)
{
   Tcl_DString dstr;
   char c = '\0';
   VA addr;
   int st;
   
   if (!pip->sym) {
       ASSERT(0);
   }
       
   st = SESL_GetTargetType(pip->sym);
   
   if ((st != SESL_TYPE_CHAR) && (st != SESL_TYPE_UCHAR)) {
      return NO;
   }

   GET_VALUE(*pip, addr, VA);

   Tcl_DStringInit(&dstr);
   
   while (1) {
      if (pip->internal) {
#if defined(sgi) || defined(sun)
         c = *(char*)addr;
#else
         ASSERT (0);
#endif
         
      } else if (CPUVec.GetMemory(CPUVec.CurrentCpuNum(), addr, 1,
                           (char *)&c) != SUCCESS) {
         return ERROR;
      }
      
      if (!c) {
         break;
      }

      Tcl_DStringAppend(&dstr, &c, 1);
      addr++;
   }

   Tcl_DStringResult(interp, &dstr);
   return OK;

error:
   Tcl_DStringFree(&dstr);
   return ERROR;
}

int symTclRead(Tcl_Interp *interp, int argc, char *argv[])
{
   ParseInfo pi;
   uint64 value;
   char buf[128];
   
   bzero((char*)&pi, sizeof(pi));

   if (SymParse(argv[2], &pi) != SYM_OK) {
#ifdef notdef
      if ((pi.str - argv[2]) < 128) {
         strncpy(buf, argv[2], pi.str - argv[2]);
         buf[pi.str - argv[2]] = '\0';
         Tcl_AppendResult(interp, "\n  ", buf, NULL);
      }
#endif
      
      SESL_FreeSymbol(pi.sym);
      return TCL_ERROR;
   }

   pi.value = SESL_GetAddress(pi.sym);

   switch (SESL_GetType(pi.sym)) {
   case SESL_TYPE_LABEL:
   case SESL_TYPE_FUNC:
   {
      ASSERT(pi.constant);
      value = pi.value;
      PrintLLX(buf,value);
      break;
   }
   case SESL_TYPE_CHAR: {
      char c = 0;
      GET_VALUE(pi, c, char);
      sprintf(buf, "%d", (int)c);
      break;
   }
   case SESL_TYPE_UCHAR: {
      unsigned char c = 0;
      GET_VALUE(pi, c, unsigned char);
      sprintf(buf, "%u", (unsigned)c);
      break;
   }
   case SESL_TYPE_SHORT: {
      short s = 0;
      GET_VALUE(pi, s, short);
      sprintf(buf, "%d", (int)s);
      break;
   }
   case SESL_TYPE_USHORT: {
      unsigned short s = 0;
      GET_VALUE(pi, s, unsigned short);
      sprintf(buf, "%u", (unsigned)s);
      break;
   }
   case SESL_TYPE_INT: {
      int i = 0;
      GET_VALUE(pi, i, int);
      sprintf(buf, "%d", i);
      break;
   }

   case SESL_TYPE_LONG: {
      int32 i32 = 0;
      int64 i64 = 0;
      int size;
      switch ((size = (int)SESL_GetSize(pi.sym)))
      {
      case 4:
          GET_VALUE(pi, i32, int32);
          i64 = i32;
          break;
      case 8:
          GET_VALUE(pi, i64, int64);
          break;
      default:
          CPUWarning("SYMBOLS: Size of long is unsupported '%d' bytes (assume 4)\n", 
                     size);
          GET_VALUE(pi, i32, int32);
          i64 = i32;
          break;
      }
      PrintLLD(buf,i64);
      break;
   }

   case SESL_TYPE_LONGLONG: {
      int64 i = 0;
      GET_VALUE(pi, i, int64);
      PrintLLD(buf,(int64)i);
      break;
   }

   case SESL_TYPE_UINT:{
      unsigned i = 0;
      GET_VALUE(pi, i, unsigned);
      sprintf(buf, "%u", i);
      break;
   }
   case SESL_TYPE_ULONG: {
      Reg i = 0;
      GET_VALUE(pi, i, Reg);
      PrintLLU(buf,(uint64)i);
      break;
   }
   case SESL_TYPE_ULONGLONG: {
      uint64 i = 0;
      GET_VALUE(pi, i, uint64);
      PrintLLU(buf,(uint64)i);
      break;
   }
   case SESL_TYPE_FLOAT: {
      uint f = 0;
      float *fptr = (float*)&f;
      GET_VALUE(pi, f, uint);
      sprintf(buf, "%f", *fptr);
      break;
   }
   case SESL_TYPE_DOUBLE: {
      int64 d = 0;
      double *dptr = (double *)&d;
      GET_VALUE(pi, d, int64);
      sprintf(buf, "%f", *dptr);
      break;
   }
   case SESL_TYPE_PTR: 
   {
      int code = readstr(interp, &pi);
      if (code == OK) {
         return TCL_OK;
      } else if (code == NO) {
          uint32 p32 = 0;
          uint64 p64 = 0;
          int size;
          switch ((size = (int)SESL_GetSize(pi.sym)))
          {
          case 4:
              GET_VALUE(pi, p32, uint32);
              p64 = p32;
              break;
          case 8:
              GET_VALUE(pi, p64, uint64);
              break;
          default:
              CPUWarning("SYMBOLS: Size of ptr is unsupported '%d' bytes (assume 4)\n", 
                         size);
              GET_VALUE(pi, p32, uint32);
              p64 = p32;
              break;
          }
          PrintLLX(buf,p64);
      } else if (code == ERROR) {
          goto error;
      }
      break;
   }
   case SESL_TYPE_ARRAY: {
       int code;
       ASSERT(pi.constant);
       code = readstr(interp, &pi);
       if (code == OK) {
           return TCL_OK;
       } else if (code == NO) {
           value = pi.value;
           PrintLLX(buf, value);
       } else {
           goto error;
       }
       break;
   }
   case SESL_TYPE_STRUCT:
   case SESL_TYPE_UNION:
   case SESL_TYPE_ENUM: {
      /* XXX change */
      ASSERT(!pi.constant);
      Tcl_AppendResult(interp, "type not impl yet", NULL);
      SESL_FreeSymbol(pi.sym);
      return TCL_ERROR;
   }
   case SESL_TYPE_UNKNOWN:
   default:
      SIM_DEBUG(('t', "offending type %s (%d)\n\r", 
                 SESL_GetTypeName(pi.sym), SESL_GetType(pi.sym)));
      CPUWarning("offending type %s (%d)\n\r", 
                 SESL_GetTypeName(pi.sym), SESL_GetType(pi.sym));
      SESL_FreeSymbol(pi.sym);
      ASSERT(0);
      break;
   }
   Tcl_SetResult(interp, buf, TCL_VOLATILE);
   SESL_FreeSymbol(pi.sym);
   return TCL_OK;

error:
   SIM_DEBUG(('t', "addr1 0x%x\n\r", pi.value));
   Tcl_AppendResult(interp, "addr not mapped", NULL);
   SESL_FreeSymbol(pi.sym);
   return TCL_ERROR;
}


/*
 *   symTclSet
 */

#ifdef SAME_ENDIAN
#define SET_VALUE(_pi, _var, _type) \
    ASSERT(!(_pi).constant); \
    ASSERT(!(_pi).internal); \
    { _type x = _var;   \
    if (!CPUVec.PutMemory || \
        CPUVec.PutMemory(CPUVec.CurrentCpuNum(), \
                         (_pi).value, sizeof(_type), (char*)&x) \
        != SUCCESS) { \
        goto error; \
    } \
   }
#else
#define SET_VALUE(_pi, _var, _type) \
    ASSERT(!(_pi).constant); \
    ASSERT(!(_pi).internal); \
    { _type x = _var;   \
     if (sizeof(_type)==2) x = BE2HO_2(x); \
     if (sizeof(_type)==4) x = BE2HO_4(x); \
     if (sizeof(_type)==8) x = BE2HO_8(x); \
    if (!CPUVec.PutMemory || \
        CPUVec.PutMemory(CPUVec.CurrentCpuNum(), \
                         (_pi).value, sizeof(_type), (char*)&x) \
        != SUCCESS) { \
        goto error; \
    } \