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/*

  File for analysis of an architecture's instructions in binary format

  Julius Baxter, julius.baxter@orsoc.se

*/

#include<stdio.h>

#include <stdlib.h>

#include <string.h>

#include <stdint.h>

#include <arpa/inet.h> // for htonl()

#include "insnanalysis.h"

// Access to list management functions

#include "insn-lists.h"

int analyse_insn(instruction insn,

                 instruction_properties *insn_props)

{

  // For now no other instruction sets supported

  return or1k_32_analyse_insn(insn, insn_props);

}

void print_insn(instruction_properties *insn_props)

{

  if (insn_props->insn_string != NULL)

    printf("%s", insn_props->insn_string);

}

void collect_stats(instruction insn,

                 instruction_properties *insn_props)

{

  or1k_32_collect_stats(insn, insn_props);

}

void generate_stats(FILE * stream)

{

  or1k_32_generate_stats(stream);

}

int main(int argc, char *argv[])

{

  FILE *fp;

  char insn_buff[INSN_SIZE_BYTES]; // Buffer for instruction data

  int insns_seen_total = 0; // Keep track of total number of instructions read

  // Try to open the file passed as first parameter

  if((fp = fopen(argv[ 1 ], "rb"))==NULL) {

    printf("Cannot open file.\n");

    exit(1);

  }

  int filesize_bytes, filesize_insns;

  // Determine filesize

  if ( fseek(fp, 0, SEEK_END))

    {

      fclose(fp);

      fprintf(stderr, "Error detecting filesize\n");

      return -1;

    }

  filesize_bytes = ftell(fp);

  filesize_insns = filesize_bytes / INSN_SIZE_BYTES;

  // Reset pointer

  rewind(fp);

  instruction * insn = (instruction *)insn_buff;

  instruction_properties insn_props;

  // Go through the file, collect stats about instructions

  // What is one-percent of instructions

  float file_one_percent = ((float)filesize_insns / 100.0f );

  float percent_of_percent=0; int percent;

  insn_lists_init();

  while(!feof(fp)) {

    if (fread(insn_buff, INSN_SIZE_BYTES, 1, fp) != 1)

      break;

    // Endianness is little when read in from binary file created with 

    // or32-elf-objcopy, so swap;

    *insn = htonl(*insn);

    if (*insn == 0) // most probably dead space in binary, skip

      continue;

    reset_instruction_properties(&insn_props);

    if (analyse_insn(*insn, &insn_props) == 0)

      {

        insns_seen_total++;

        collect_stats(*insn, &insn_props);

      }

    else

      {

        // Non-zero return from analyse_insn(): problem analysing instruction.

        // Is a NOP for now, but do something here if needed

        do{ } while(0);

      }

    // Progress indicator

    percent_of_percent += 1.0f;

    if (percent_of_percent >= file_one_percent)

      {

        percent++;

        fprintf(stderr, "\r%d%%", percent);

        percent_of_percent = 0;

      }

  }

  fclose(fp);

  printf("\rSaw %d instructions\n", insns_seen_total);

  generate_stats(stdout);

  insn_lists_free();

  return 0;

}