debug_trans.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. 
 *
 */

#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <disassembler.h>
#include "mshade.h"
#include "cp0.h"
#include "tc.h"
#include "stats.h"

int trans_test_num_decoded;

/* Dummy Functions */
void callout(void) {}
void mem_ref_wrapper(void) {}
void phys_mem_ref_wrapper(void) {}
void do_periodic_callout(void) {}
void get_fc31(void){}
void compare_and_swap(unsigned u, unsigned u1, unsigned u2){}
void ReenterTC(void){}
void continue_run(void) {}
void continue_run_without_chaining(void) {}
void Clear_Translation_State(){}
void icache_coherence_flush( void ) {}
int icache_coherence_is_code( PA pAddr ) { return 1;}
void icache_coherence_mark_code( K0A start, K0A finish ) {}
void icache_coherence_check( PA start, PA finish, VA vAddr ) {}
void Embra_CX(void) {}
int hw_counter_start( HW_counter* count ) {}
int hw_counter_stop( HW_counter* count ) {}
double sqrt(double d) {}
K0A  mem_ref( VA vAddr, int new_state ) {}
void  qc_downgrade( VA vAddr, int new_state ) {}
void em_remap(void) {}
void UPperiodic_callout(void) {}
void CSpillFP(void) {}
void FlashliteConfigDefaults(void) {}
uint ICheckLevel;


typedef struct {
   uint addr;
   char* name;
}rout2name;

static rout2name r2n[] = {
   { (uint) callout, "callout" },
   { (uint) mem_ref_wrapper, "mem_ref_wrapper" },
   { (uint) phys_mem_ref_wrapper, "phys_mem_ref_wrapper" },
   { (uint) do_periodic_callout, "do_periodic_callout" },
   { (uint) compare_and_swap, "compare_and_swap" },
   { (uint) continue_run, "continue_run" },
   { (uint) continue_run_without_chaining, "continue_run_without_chaining"},
};
#define R2N_SIZE (sizeof(r2n)/sizeof(r2n[0]))


/* Dummy Globals */
int numCPUs;
stats_t em_stats;

/* Initialized globals */
TC realtc;
TC* tc = &realtc;
CPUType emode;
EmbraState PE_Space[1];
EmbraState* PE = PE_Space;
EmbraState* EMP = PE_Space;
int is_R4000;

int MPinUP;

int Simcp0MustRunCPU(void)
{
   return 1;
}
K0A non_excepting_tv( int cpuNum, VA va )
{
   return va;
}
K0A mem_translate( int cpuNum, VA vAddr )
{
   return vAddr;
}

Result
Em_TranslateVirtual(int cpuNum, VA vAddr, PA *pAddr, Em_accesstype act)
{
   *pAddr = vAddr;
   return NORMAL_CODE;
}

main(int argc, char** argv)
{
   int fd;
   unsigned* instr;
   long len;
   unsigned g1, g2, g3;
   char buf[100];
   unsigned i;
   unsigned* code_ptr;
   uint* trans_ptr;
   uint* trans_end_ptr;
   int c;
   extern int optind;
   uint map_addr = 0;

   is_R4000 = 1;
   emode = EMBRA_PAGE;
   EMP[0].outTC = 1;
   MPinUP = 0;

   while ((c = getopt(argc, argv, "pckum")) != EOF) {
      switch (c) {
      case 'p':
         emode = EMBRA_PAGE;
         break;
      case 'm':
         MPinUP = 1;
         break;
      case 'c':
         emode = EMBRA_CACHE;
         break;
      case 'k':
         map_addr = 0x60000000;
         break;
      case 'u':
         map_addr = 0;
         break;
      default:
         printf("Usage: %s -p (page) -c (cache) -u (user) -k (kernel) -m (MPinUP)\n", argv[0]);
      }
   }

   SimConfigDefaults();
   tc = TC_init();
   DecoderInit();
   Translator_Init();
   pc_tc_init();
   dis_init( 0, 0, 0, 1);

   fd = open( argv[optind], O_RDWR, 0);
   if( fd == -1 ) {
      printf("Can't open %s\n", argv[optind]);
      perror("open");
   }
   len = lseek(fd,0,SEEK_END);
   if( map_addr ) {
      instr = (unsigned*)mmap((void*)map_addr, len, (PROT_READ),
                              (MAP_PRIVATE|MAP_FIXED), fd, 0);
      if( (int) instr != map_addr )
         perror("mmap");
   } else {
      instr = (unsigned*)mmap((void*)0, len, (PROT_READ),
                              (MAP_PRIVATE), fd, 0);
      if( (int) instr == -1 )
         perror("mmap");
   }


   code_ptr = instr;
   while( (unsigned)code_ptr < ((unsigned)instr+len) ) {
      int junk;
      Translate( 0, code_ptr, &junk );
      code_ptr = (unsigned*) 
         ((unsigned)code_ptr + (trans_test_num_decoded * sizeof(unsigned)));
   }
   if( map_addr ) {
      trans_ptr = tc->kern_buf;
      trans_end_ptr = (uint*)tc->kern_next;
   } else {
      trans_ptr = tc->exec_buf;
      trans_end_ptr = (uint*)tc->next;
   }
   while( trans_ptr < trans_end_ptr ) {
      int inst_type;
      uint target;
      inst_type = disasm( buf, (uint)trans_ptr, *trans_ptr, &g1, &target, &g3 );
      trans_ptr++;
      printf("%s", buf);
      switch( inst_type ) {
      case 1: {
         int i;
         for( i = 0; i < R2N_SIZE; i++ ) {
            if( target == r2n[i].addr ) {
               printf("  %s", r2n[i].name);
               break;
            }
         }
      }
         break;
      }
      printf("\n");
   }
}