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/* parce.c -- Architecture independent load
   Copyright (C) 1999 Damjan Lampret, lampret@opencores.org
 
This file is part of OpenRISC 1000 Architectural Simulator.
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
 
#include "abstract.h"
#include "arch.h"
#include "dmmu.h"
#include "coff.h"
#include "elf.h"
#include "debug_unit.h"
#include "opcode/or32.h"
#include "parse.h"
#include "sim-config.h"
 
#define MEMORY_LEN 0x100000000
#define MAXLINE_LEN 18000
 
/* Whether to do immediate statistics */
#define IMM_STATS 0
 
extern char *disassembled;
 
/* Unused mem memory marker. It is used when allocating program and data memory
   during parsing */
unsigned int freemem;
 
/* Translation table provided by microkernel. Only used if simulating microkernel. */
static unsigned long transl_table;
 
/* Used to signal whether during loading of programs a translation fault occured. */
static unsigned long transl_error;
 
 
char *strtoken(char *in, char *out, int which)
{
  char  *super;
  char  *sub;
  char  *newline;
 
  super = strdup(in);
  sub = strtok(super, " \t");
  while (sub && --which)
    sub = strtok(NULL, " \t");
  if (sub && !which) {
    if ((newline = strchr(sub, '\n')))
      newline[0] = '\0';
    strcpy(out, sub);
  } else
    out[0] = '\0';
  free(super);
  if ((newline = strchr(out, '\r')))  /* get rid of CR */
    newline[0] = '\0';
  return(out);
}
 
char *
stripwhite (string)
     char *string;
{
  register char *s, *t;
 
  for (s = string; whitespace (*s); s++)
    ;
 
  if (*s == 0)
    return (s);
 
  t = s + strlen (s) - 1;
  while (t > s && whitespace (*t))
    t--;
  *++t = '\0';
 
  return s;
}
 
char *
dupstr (s)
     char *s;
{
  char *r;
 
  r = (char *)malloc (strlen (s) + 1);
  strcpy (r, s);
  return (r);
}
 
/* This function is very similar to strncpy, except it null terminates the string */
char *strstrip (char *dst, const char *src, int n)
{
  strncpy (dst, src, n);
  *(dst + n) = '\0';
  return dst;
}
 
/* Parses string line and puts up to maxparam parameters into argv[]; number of parameters is returned */
int tokenize_line (char *str, char *argv[], int maxparam)
{
  int i, param = 0;
  str = stripwhite (str);
  while (*str) {
    char *p;
    argv[param] = str;
    while (*str && !isblank (*str)) str++;
    param++;
    p = str;
    if (param >= maxparam) break;
    while (*str && isblank (*str)) str++;
    *p = 0;
  }
  for (i = 0; i < param; i++) argv[i] = stripwhite (argv[i]);
  return param;
}
 
/* Used only by the simulator loader to translate logical addresses into physical.
   If loadcode() is called with valid virtphy_transl pointer to a table of
   translations then translate() performs translation otherwise phy address is
   equal to logical. */
static unsigned int translate(unsigned int laddr,int* breakpoint)
{
  int i;
 
  /* No translation (i.e. when loading kernel into simulator)
/*  PRINTF("transl_table=%x  laddr=%x\n", transl_table, laddr);
  PRINTF("laddr=%x\n", laddr);*/
  if (transl_table == 0)
    return laddr;
 
  /* Try to find our translation in the table. */
  for(i = 0; i < (MEMORY_LEN / PAGE_SIZE) * 16; i += 16)
    if ((laddr & ~(PAGE_SIZE - 1)) == evalsim_mem32(transl_table + i)) {
      setsim_mem32(transl_table + i + 8, -2); /* Page modified */
      PRINTF("found paddr=%x\n", evalsim_mem32(transl_table + i + 4) | (laddr & (PAGE_SIZE - 1)));
      return (unsigned long)evalsim_mem32(transl_table + i + 4) | (laddr & (unsigned long)(PAGE_SIZE - 1));
    }
 
  /* Allocate new phy page for us. */
  for(i = 0; i < (MEMORY_LEN / PAGE_SIZE) * 16; i += 16)
    if (evalsim_mem32(transl_table + i + 8) == 0) {
      setsim_mem32(transl_table + i, laddr & ~(PAGE_SIZE - 1)); /* VPN */
      setsim_mem32(transl_table + i + 4, (i/16) * PAGE_SIZE); /* PPN */
      setsim_mem32(transl_table + i + 8, -2); /* Page modified */
      PRINTF("newly allocated ppn=%x\n", (unsigned long)evalsim_mem32(transl_table + i + 4));
      PRINTF("newly allocated .ppn=%x\n", (unsigned long)transl_table + i + 4);
      PRINTF("newly allocated ofs=%x\n", (unsigned long)(laddr & (PAGE_SIZE - 1)));
      PRINTF("newly allocated paddr=%x\n", (unsigned long)evalsim_mem32(transl_table + i + 4) | (laddr & (PAGE_SIZE - 1)));
      return (unsigned long)evalsim_mem32(transl_table + i + 4) | (laddr & (unsigned long)(PAGE_SIZE - 1));
    }
  /* If we come this far then all phy memory is used and we can't find our page
     nor allocate new page. */
  transl_error = 1;
 
  PRINTF("can't translate\n", laddr);
  exit(1);
  return -1;
}
 
#if IMM_STATS
int bcnt[33][3] = {0};
int bsum[3] = {0};
unsigned long movhi = 0;
 
int bits (unsigned long val) {
  int i = 1;
  if (!val) return 0;
  while (val != 0 && (signed long)val != -1) {i++; val = (signed long)val >> 1;}
  return i;
}
 
void check_insn (unsigned long insn) {
  int insn_index = insn_decode (insn);
  struct insn_op_struct *opd = op_start[insn_index];
  unsigned long data = 0;
  int dis = 0;
  const char *name;
  if (!insn || insn_index < 0) return;
  name = insn_name (insn_index);
  if (strcmp (name, "l.nop") == 0 || strcmp (name, "l.sys") == 0) return;
 
  while (1)
    {
      unsigned long tmp = 0, nbits = 0;
      while (1)
        {
          tmp |= ((insn  >> (opd->type & OPTYPE_SHR)) & ((1 << opd->data) - 1)) << nbits;
          nbits += opd->data;
          if (opd->type & OPTYPE_OP)
            break;
          opd++;
        }
 
      /* Do we have to sign extend? */
      if (opd->type & OPTYPE_SIG)
        {
          int sbit = (opd->type & OPTYPE_SBIT) >> OPTYPE_SBIT_SHR;
          if (tmp & (1 << sbit))
            tmp |= 0xFFFFFFFF << sbit;
        }
      if (opd->type & OPTYPE_DIS) {
        /* We have to read register later.  */
        data += tmp;
        dis = 1;
      } else
        {
          if (!(opd->type & OPTYPE_REG) || dis) {
            if (!dis) data = tmp;
            if (strcmp (name, "l.movhi") == 0) {
              movhi = data << 16;
            } else {
              data |= movhi;
              //PRINTF ("%08x %s\n", data, name);
              if (!(or32_opcodes[insn_index].flags & OR32_IF_DELAY)) {
                bcnt[bits(data)][0]++; bsum[0]++;
              } else {
                if (strcmp (name, "l.bf") == 0 || strcmp (name, "l.bnf") == 0) {
                  bcnt[bits(data)][1]++; bsum[1]++;
                } else {
                  bcnt[bits(data)][2]++; bsum[2]++;
                }
              }
            }
          }
          data = 0;
          dis = 0;
        }
      if(opd->type & OPTYPE_LAST) {
        return;
      }
      opd++;
    }
}
#endif
 
char null_str[1] = "\0";
 
/* Replaced several calls to translate(freemem) with vaddr */
/* Added new mode execution code */
/* Changed parameters so address can be passed as argument */
void addprogram(unsigned long address, unsigned long insn, int* breakpoint)
{
  char insn_first2_char[3];
  int vaddr = (!runtime.sim.filename) ? translate(address,breakpoint) : translate(freemem,breakpoint);
 
  setsim_mem32 (vaddr, insn);
#if IMM_STATS
  check_insn (insn);
#endif
  if(runtime.sim.filename)
    freemem += insn_len (insn_decode (insn));
}
 
/* Load big-endian COFF file.  */
 
void readfile_coff(char *filename, short sections)
{
  FILE *inputfs;
  char inputbuf[4];
  unsigned long insn;
  signed long sectsize;
  COFF_AOUTHDR coffaouthdr;
  struct COFF_scnhdr coffscnhdr;
  int  len;
  char item[MAXLINE_LEN];
  char item2[MAXLINE_LEN];
  int  firstthree = 0;
  int breakpoint = 0;
 
  if (!(inputfs = fopen(filename, "r"))) {
    perror("readfile_coff");
    exit(1);
  }
 
  if (fseek(inputfs, sizeof(struct COFF_filehdr), SEEK_SET) == -1) {
    fclose(inputfs);
    perror("readfile_coff");
    exit(1);
  }
 
  if (fread(&coffaouthdr, sizeof(coffaouthdr), 1, inputfs) != 1) {
    fclose(inputfs);
    perror("readfile_coff");
    exit(1);
  }
 
  while(sections--) {
    long scnhdr_pos = sizeof(struct COFF_filehdr) + sizeof(coffaouthdr)
        + sizeof(struct COFF_scnhdr) * firstthree;
    if (fseek(inputfs, scnhdr_pos, SEEK_SET) == -1) {
      fclose(inputfs);
      perror("readfile_coff");
      exit(1);
    }
    if (fread(&coffscnhdr, sizeof(struct COFF_scnhdr), 1, inputfs) != 1) {
      fclose(inputfs);
      perror("readfile_coff");
      exit(1);
    }
    PRINTF("Section: %s,", coffscnhdr.s_name);
    PRINTF(" paddr: 0x%.8x,", COFF_LONG_H(coffscnhdr.s_paddr));
    PRINTF(" vaddr: 0x%.8x,", COFF_LONG_H(coffscnhdr.s_vaddr));
    PRINTF(" size: 0x%.8x,", COFF_LONG_H(coffscnhdr.s_size));
    PRINTF(" scnptr: 0x%.8x\n", COFF_LONG_H(coffscnhdr.s_scnptr));
 
    sectsize = COFF_LONG_H(coffscnhdr.s_size);
#if 0
    /* A couple of sanity checks. */
    if (translate(COFF_LONG_H(coffscnhdr.s_vaddr),&breakpoint) < MEMORY_START) {
      PRINTF("Section %s starts out of ", coffscnhdr.s_name);
      PRINTF("memory (at %x)\n", COFF_LONG_H(coffscnhdr.s_vaddr));
      exit(1);
    }
    if (translate(COFF_LONG_H(coffscnhdr.s_vaddr) + sectsize,&breakpoint) >
        MEMORY_START + MEMORY_LEN) {
      PRINTF("Section %s ends out of ", coffscnhdr.s_name);
      PRINTF("memory.\n");
      exit(1);
    }
#endif
#if 0
    if (++firstthree == 1 && strcmp(coffscnhdr.s_name, ".text") != 0) {
      PRINTF("First section should be .text (%s instead)\n", coffscnhdr.s_name);
      exit(1);
    }
    if (firstthree == 2 && strcmp(coffscnhdr.s_name, ".data") != 0) {
      PRINTF("Second section should be .data (%s instead)\n", coffscnhdr.s_name);
      exit(1);
    }
    if (firstthree == 3 && strcmp(coffscnhdr.s_name, ".bss") != 0) {
      PRINTF("Third section should be .bss (%s instead)\n", coffscnhdr.s_name);
      exit(1);
    }
#else
    ++firstthree;
#endif
 
    /* loading section */
    freemem = COFF_LONG_H(coffscnhdr.s_paddr);
    debug(2,"Starting to load at 0x%x\n", freemem);
    if (fseek(inputfs, COFF_LONG_H(coffscnhdr.s_scnptr), SEEK_SET) == -1) {
      fclose(inputfs);
      perror("readfile_coff");
      exit(1);
    }
    while (sectsize > 0 && (len = fread(&inputbuf, sizeof(inputbuf), 1, inputfs))) {
      insn = COFF_LONG_H(inputbuf);
      len = insn_len (insn_decode (insn));
      if (len == 2)
        {
          fseek(inputfs, -2, SEEK_CUR);
          debug(8,"readfile_coff: %x 0x%x   \n", sectsize, insn >> 16);
        }
      else
        debug(8,"readfile_coff: %x 0x%x   \n", sectsize, insn);
      addprogram (freemem, insn, &breakpoint);
      sectsize -= len;
    }
  }
  if (firstthree < 3) {
    PRINTF("One or more missing sections. At least");
    PRINTF(" three sections expected (.text, .data, .bss).\n");
    exit(1);
  }
  if (firstthree > 3) {
    PRINTF("Warning: one or more extra sections. These");
    PRINTF(" sections were handled as .data sections.\n");
  }
 
  fclose(inputfs);
  PRINTF("Finished loading COFF.\n");
  return;
}
 
/* Load symbols from big-endian COFF file. */
 
void readsyms_coff(char *filename, unsigned long symptr, long syms)
{
  FILE *inputfs;
  struct COFF_syment coffsymhdr;
  int breakpoint = 0;
  int count = 0;
  long nsyms = syms;
  if (!(inputfs = fopen(filename, "r"))) {
    perror("readsyms_coff");
    exit(1);
  }
 
  if (fseek(inputfs, symptr, SEEK_SET) == -1) {
    fclose(inputfs);
    perror("readsyms_coff");
    exit(1);
  }
 
  while(syms--) {
    int i, n;
    if (fread(&coffsymhdr, COFF_SYMESZ, 1, inputfs) != 1) {
      fclose(inputfs);
      perror("readsyms_coff");
      exit(1);
    }
 
    n = (unsigned char)coffsymhdr.e_numaux[0];
 
    /* check whether this symbol belongs to a section and is external symbol; ignore all others */
    if (COFF_SHORT_H(coffsymhdr.e_scnum) >= 0 && coffsymhdr.e_sclass[0] == C_EXT) {
#if 0
    /* If not important or not in text, skip. */
    if(COFF_SHORT_H(coffsymhdr.e_type) & COFF_N_TMASK & COFF_STYP_TEXT) {
#endif
 
      if (*((unsigned long *)coffsymhdr.e.e.e_zeroes)) {
        if (strlen(coffsymhdr.e.e_name) && strlen(coffsymhdr.e.e_name) < 9)
          add_label(COFF_LONG_H(coffsymhdr.e_value), coffsymhdr.e.e_name);
        debug(8, "[%i] Symbol: %s,", count++, coffsymhdr.e.e_name);
      } else {
        long fpos = ftell (inputfs);
 
        if (fseek(inputfs, symptr + nsyms * COFF_SYMESZ + COFF_LONG_H(coffsymhdr.e.e.e_offset), SEEK_SET) == 0) {
          char tmp[33], *s = &tmp[0];
          while (s != &tmp[32])
            if ((*(s++) = fgetc(inputfs)) == 0) break;
          tmp[32] = 0;
          add_label(COFF_LONG_H(coffsymhdr.e_value), &tmp[0]);
          debug(8, "[%i] Symbol: %s,", count++, &tmp[0]);
        }
        fseek(inputfs, fpos, SEEK_SET);
      }
 
      debug(9, " val: 0x%.8x,", COFF_LONG_H(coffsymhdr.e_value));
      debug(9, " type: %x, %x, auxs: %i\n", COFF_SHORT_H(coffsymhdr.e_type), *((unsigned short *)coffsymhdr.e_type), n);
    }
 
    for (i = 0; i < n; i++)
      if (fread(&coffsymhdr, COFF_SYMESZ, 1, inputfs) != 1) {
        fclose(inputfs);
        perror("readsyms_coff3");
        exit(1);
      }
    syms -= n;
    count += n;
  }
 
  fclose(inputfs);
  PRINTF("Finished loading symbols.\n");
  return;
}
 
void readfile_elf(char *filename)
{
 
  FILE *inputfs;
  struct elf32_hdr elfhdr;
  struct elf32_phdr *elf_phdata;
  struct elf32_shdr *elf_spnt, *elf_shdata;
  struct elf32_sym *sym_tbl = (struct elf32_sym *)0;
  unsigned long syms = 0;
  char *str_tbl = (char *)0;
  char *s_str = (char *)0;
  int breakpoint = 0;
  unsigned long inputbuf;
  unsigned long insn, padd;
  int i, j, sectsize, len;
 
  if (!(inputfs = fopen(filename, "r"))) {
    perror("readfile_elf");
    exit(1);
  }
 
  if (fread(&elfhdr, sizeof(elfhdr), 1, inputfs) != 1) {
    perror("readfile_elf");
    exit(1);
  }
 
  if ((elf_shdata = (struct elf32_shdr *)malloc(ELF_SHORT_H(elfhdr.e_shentsize) * ELF_SHORT_H(elfhdr.e_shnum))) == NULL) {
     perror("readfile_elf");
     exit(1);
  }
 
  if (fseek(inputfs, ELF_LONG_H(elfhdr.e_shoff), SEEK_SET) != 0) {
    perror("readfile_elf");
    exit(1);
  }
 
  if (fread(elf_shdata, ELF_SHORT_H(elfhdr.e_shentsize) * ELF_SHORT_H(elfhdr.e_shnum), 1, inputfs) != 1) {
    perror("readfile_elf");
    exit(1);
  }
 
  if (ELF_LONG_H(elfhdr.e_phoff)) {
 
    if((elf_phdata = (struct elf32_phdr *)malloc(ELF_SHORT_H(elfhdr.e_phnum) * ELF_SHORT_H(elfhdr.e_phentsize))) == NULL) {
      perror("readfile_elf");
      exit(1);
    }
 
    if (fseek(inputfs, ELF_LONG_H(elfhdr.e_phoff), SEEK_SET) != 0) {
      perror("readfile_elf");
      exit(1);
    }
 
    if (fread(elf_phdata, ELF_SHORT_H(elfhdr.e_phnum) * ELF_SHORT_H(elfhdr.e_phentsize), 1, inputfs) != 1) {
      perror("readfile_elf");
      exit(1);
    }
  }
 
  for(i = 0, elf_spnt = elf_shdata; i < ELF_SHORT_H(elfhdr.e_shnum); i++, elf_spnt++) {
 
    if(ELF_LONG_H(elf_spnt->sh_type) == SHT_STRTAB) {
 
      if((str_tbl = (char *)malloc(ELF_LONG_H(elf_spnt->sh_size))) == NULL) {
        perror("readfile_elf");
        exit(1);
      }
 
      if (fseek(inputfs, ELF_LONG_H(elf_spnt->sh_offset), SEEK_SET) != 0) {
        perror("readfile_elf");
        exit(1);
      }
 
      if (fread(str_tbl, ELF_LONG_H(elf_spnt->sh_size), 1, inputfs) != 1) {
        perror("readfile_elf");
        exit(1);
      }
    }
    else if(ELF_LONG_H(elf_spnt->sh_type) == SHT_SYMTAB) {
 
      if((sym_tbl = (struct elf32_sym *)malloc(ELF_LONG_H(elf_spnt->sh_size))) == NULL) {
        perror("readfile_elf");
        exit(1);
      }
 
      if (fseek(inputfs, ELF_LONG_H(elf_spnt->sh_offset), SEEK_SET) != 0) {
        perror("readfile_elf");
        exit(1);
      }
 
      if (fread(sym_tbl, ELF_LONG_H(elf_spnt->sh_size), 1, inputfs) != 1) {
        perror("readfile_elf");
        exit(1);
      }
 
      syms = ELF_LONG_H(elf_spnt->sh_size) / ELF_LONG_H(elf_spnt->sh_entsize);
    }
  }
 
  if (ELF_SHORT_H(elfhdr.e_shstrndx) != SHN_UNDEF) {
    elf_spnt = &elf_shdata[ELF_SHORT_H(elfhdr.e_shstrndx)];
 
    if((s_str = (char *)malloc(ELF_LONG_H(elf_spnt->sh_size))) == NULL) {
      perror("readfile_elf");
      exit(1);
    }
 
    if (fseek(inputfs, ELF_LONG_H(elf_spnt->sh_offset), SEEK_SET) != 0) {
      perror("readfile_elf");
      exit(1);
    }
 
    if (fread(s_str, ELF_LONG_H(elf_spnt->sh_size), 1, inputfs) != 1) {
      perror("readfile_elf");
      exit(1);
    }
  }
 
 
  for(i = 0, elf_spnt = elf_shdata; i < ELF_SHORT_H(elfhdr.e_shnum); i++, elf_spnt++) {
 
    if((ELF_LONG_H(elf_spnt->sh_type) & SHT_PROGBITS) && (ELF_LONG_H(elf_spnt->sh_flags) & SHF_ALLOC)) {
 
      padd = ELF_LONG_H(elf_spnt->sh_addr);
      for(j = 0; j < ELF_SHORT_H(elfhdr.e_phnum); j++) {
        if(ELF_LONG_H(elf_phdata[j].p_offset) &&
           ELF_LONG_H(elf_phdata[j].p_offset) <= ELF_LONG_H(elf_spnt->sh_offset) &&
          (ELF_LONG_H(elf_phdata[j].p_offset) + ELF_LONG_H(elf_phdata[j].p_memsz)) > ELF_LONG_H(elf_spnt->sh_offset))
          padd = ELF_LONG_H(elf_phdata[j].p_paddr) + ELF_LONG_H(elf_spnt->sh_offset) - ELF_LONG_H(elf_phdata[j].p_offset);
      }
 
 
 
      if (ELF_LONG_H(elf_spnt->sh_name) && s_str)
        PRINTF("Section: %s,", &s_str[ELF_LONG_H(elf_spnt->sh_name)]);
      else
        PRINTF("Section: noname,");
      PRINTF(" vaddr: 0x%.8x,", ELF_LONG_H(elf_spnt->sh_addr));
      PRINTF(" paddr: 0x%.8x,", padd);
      PRINTF(" offset: 0x%.8x,", ELF_LONG_H(elf_spnt->sh_offset));
      PRINTF(" size: 0x%.8x\n", ELF_LONG_H(elf_spnt->sh_size));
 
      freemem = padd;
      sectsize = ELF_LONG_H(elf_spnt->sh_size);
 
      if (fseek(inputfs, ELF_LONG_H(elf_spnt->sh_offset), SEEK_SET) != 0) {
        perror("readfile_elf");
        exit(1);
      }
 
      while (sectsize > 0 && (len = fread(&inputbuf, sizeof(inputbuf), 1, inputfs))) {
        insn = ELF_LONG_H(inputbuf);
        len = insn_len (insn_decode (insn));
        if (len == 2)
          {
            fseek(inputfs, -2, SEEK_CUR);
            debug(8, "readfile_elf: %x 0x%x   \n", sectsize, insn >> 16);
          }
        else
          debug(8, "readfile_elf: %x 0x%x   \n", sectsize, insn);
        addprogram (freemem, insn, &breakpoint);
        sectsize -= len;
      }
    }
  }
 
  if (str_tbl) {
    i = 0;
    while(syms--) {
      if (sym_tbl[i].st_name)
        add_label(ELF_LONG_H(sym_tbl[i].st_value), &str_tbl[ELF_LONG_H(sym_tbl[i].st_name)]);
      i++;
    }
  }
}
 
/* Identify file type and call appropriate readfile_X routine. It only
handles orX-coff-big executables at the moment. */
 
void identifyfile(char *filename)
{
  FILE *inputfs;
  struct COFF_filehdr coffhdr;
  struct elf32_hdr elfhdr;
  size_t len;
 
  if (!(inputfs = fopen(filename, "r"))) {
    perror(filename);
    fflush(stdout);
    fflush(stderr);
    exit(1);
  }
 
  if (fread(&coffhdr, sizeof(coffhdr), 1, inputfs) == 1) {
    if (COFF_SHORT_H(coffhdr.f_magic) == 0x17a) {
          unsigned long opthdr_size;
      PRINTF("COFF magic: 0x%.4x\n", COFF_SHORT_H(coffhdr.f_magic));
      PRINTF("COFF flags: 0x%.4x\n", COFF_SHORT_H(coffhdr.f_flags));
      PRINTF("COFF symptr: 0x%.8x\n", COFF_LONG_H(coffhdr.f_symptr));
      if ((COFF_SHORT_H(coffhdr.f_flags) & COFF_F_EXEC) != COFF_F_EXEC) {
        PRINTF("This COFF is not an executable.\n");
        exit(1);
      }
      opthdr_size = COFF_SHORT_H(coffhdr.f_opthdr);
      if (opthdr_size != sizeof(COFF_AOUTHDR)) {
        PRINTF("COFF optional header is missing or not recognized.\n");
        PRINTF("COFF f_opthdr: 0x%.2x\n", opthdr_size);
        exit(1);
      }
      fclose(inputfs);
      readfile_coff(filename, COFF_SHORT_H(coffhdr.f_nscns));
      readsyms_coff(filename, COFF_LONG_H(coffhdr.f_symptr), COFF_LONG_H(coffhdr.f_nsyms));
      return;
    }
    else {
      PRINTF("Not COFF file format\n");
      fseek(inputfs, 0, SEEK_SET);
    }
  }
  if (fread(&elfhdr, sizeof(elfhdr), 1, inputfs) == 1) {
    if (elfhdr.e_ident[0] == 0x7f && elfhdr.e_ident[1] == 0x45 && elfhdr.e_ident[2] == 0x4c && elfhdr.e_ident[3] == 0x46) {
      PRINTF("ELF type: 0x%.4x\n", ELF_SHORT_H(elfhdr.e_type));
      PRINTF("ELF machine: 0x%.4x\n", ELF_SHORT_H(elfhdr.e_machine));
      PRINTF("ELF version: 0x%.8x\n", ELF_LONG_H(elfhdr.e_version));
      PRINTF("ELF sec = %d\n", ELF_SHORT_H(elfhdr.e_shnum));
      if (ELF_SHORT_H(elfhdr.e_type) != ET_EXEC ) {
        PRINTF("This ELF is not an executable.\n");
        exit(1);
      }
      fclose(inputfs);
      readfile_elf(filename);
      return;
    }
    else {
      PRINTF("Not ELF file format.\n");
      fseek(inputfs, 0, SEEK_SET);
    }
  }
 
  perror("identifyfile2");
  fclose(inputfs);
 
  return;
}
 
 
/* Loads file to memory starting at address startaddr and returns freemem. */
unsigned long loadcode(char *filename, unsigned long startaddr, unsigned long virtphy_transl)
{
  int breakpoint = 0;
 
  transl_error = 0;
  transl_table = virtphy_transl;
  freemem = startaddr;
  PRINTF("loadcode: filename %s  startaddr=%x  virtphy_transl=%x\n", filename, startaddr, virtphy_transl);
  identifyfile(filename);
 
#if IMM_STATS  
  {
    int i = 0, a = 0, b = 0, c = 0;
    PRINTF ("index:arith/branch/jump\n");
    for (i = 0; i < 33; i++) PRINTF ("%2i:\t%3.0f%% / %3.0f%%/ %3.0f%%\t%5i / %5i / %5i\n", i, 100.* (a += bcnt[i][0])/bsum[0],
        100.* (b += bcnt[i][1])/bsum[1], 100.* (c += bcnt[i][2])/bsum[2], bcnt[i][0], bcnt[i][1], bcnt[i][2]);
    PRINTF ("\nsum %i %i %i\n", bsum[0], bsum[1], bsum[2]);
  }
#endif
 
  if (transl_error)
    return -1;
  else
    return translate(freemem,&breakpoint);
 
}

Line No.	Rev	Author	Line
1	138	markom	`/* parce.c -- Architecture independent load`
2	2	cvs	`Copyright (C) 1999 Damjan Lampret, lampret@opencores.org`
3
4			`This file is part of OpenRISC 1000 Architectural Simulator.`
5
6			`This program is free software; you can redistribute it and/or modify`
7			`it under the terms of the GNU General Public License as published by`
8			`the Free Software Foundation; either version 2 of the License, or`
9			`(at your option) any later version.`
10
11			`This program is distributed in the hope that it will be useful,`
12			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
13			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
14			`GNU General Public License for more details.`
15
16			`You should have received a copy of the GNU General Public License`
17			`along with this program; if not, write to the Free Software`
18			`Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */`
19
20			`#include <stdio.h>`
21			`#include <ctype.h>`
22			`#include <string.h>`
23			`#include <stdlib.h>`
24
25			`#include "abstract.h"`
26	18	lampret	`#include "arch.h"`
27	67	lampret	`#include "dmmu.h"`
28	28	lampret	`#include "coff.h"`
29	808	simons	`#include "elf.h"`
30	138	markom	`#include "debug_unit.h"`
31	134	markom	`#include "opcode/or32.h"`
32	138	markom	`#include "parse.h"`
33	242	markom	`#include "sim-config.h"`
34	2	cvs
35	221	markom	`#define MEMORY_LEN 0x100000000`
36	361	markom	`#define MAXLINE_LEN 18000`
37	2	cvs
38	694	markom	`/* Whether to do immediate statistics */`
39			`#define IMM_STATS 0`
40
41	28	lampret	`extern char *disassembled;`
42
43	2	cvs	`/* Unused mem memory marker. It is used when allocating program and data memory`
44			`during parsing */`
45			`unsigned int freemem;`
46
47	67	lampret	`/* Translation table provided by microkernel. Only used if simulating microkernel. */`
48			`static unsigned long transl_table;`
49
50			`/* Used to signal whether during loading of programs a translation fault occured. */`
51			`static unsigned long transl_error;`
52
53
54	2	cvs	`char strtoken(char in, char *out, int which)`
55			`{`
56	361	markom	`char *super;`
57			`char *sub;`
58			`char *newline;`
59
60			`super = strdup(in);`
61			`sub = strtok(super, " \t");`
62			`while (sub && --which)`
63			`sub = strtok(NULL, " \t");`
64			`if (sub && !which) {`
65			`if ((newline = strchr(sub, '\n')))`
66			`newline[0] = '\0';`
67			`strcpy(out, sub);`
68			`} else`
69			`out[0] = '\0';`
70			`free(super);`
71			`if ((newline = strchr(out, '\r'))) /* get rid of CR */`
72			`newline[0] = '\0';`
73			`return(out);`
74	2	cvs	`}`
75
76	304	markom	`char *`
77			`stripwhite (string)`
78			`char *string;`
79			`{`
80			`register char s, t;`
81
82			`for (s = string; whitespace (*s); s++)`
83			`;`
84
85			`if (*s == 0)`
86			`return (s);`
87
88			`t = s + strlen (s) - 1;`
89			`while (t > s && whitespace (*t))`
90			`t--;`
91			`*++t = '\0';`
92
93			`return s;`
94			`}`
95
96			`char *`
97			`dupstr (s)`
98			`char *s;`
99			`{`
100			`char *r;`
101
102	306	markom	`r = (char *)malloc (strlen (s) + 1);`
103	304	markom	`strcpy (r, s);`
104			`return (r);`
105			`}`
106
107	897	markom	`/* This function is very similar to strncpy, except it null terminates the string */`
108			`char strstrip (char dst, const char *src, int n)`
109			`{`
110			`strncpy (dst, src, n);`
111			`*(dst + n) = '\0';`
112			`return dst;`
113			`}`
114
115	848	markom	`/* Parses string line and puts up to maxparam parameters into argv[]; number of parameters is returned */`
116			`int tokenize_line (char str, char argv[], int maxparam)`
117			`{`
118			`int i, param = 0;`
119			`str = stripwhite (str);`
120			`while (*str) {`
121			`char *p;`
122			`argv[param] = str;`
123			`while (str && !isblank (str)) str++;`
124			`param++;`
125			`p = str;`
126			`if (param >= maxparam) break;`
127			`while (str && isblank (str)) str++;`
128			`*p = 0;`
129			`}`
130			`for (i = 0; i < param; i++) argv[i] = stripwhite (argv[i]);`
131			`return param;`
132			`}`
133
134	221	markom	`/* Used only by the simulator loader to translate logical addresses into physical.`
135	67	lampret	`If loadcode() is called with valid virtphy_transl pointer to a table of`
136			`translations then translate() performs translation otherwise phy address is`
137			`equal to logical. */`
138	123	markom	`static unsigned int translate(unsigned int laddr,int* breakpoint)`
139	67	lampret	`{`
140	361	markom	`int i;`
141
142			`/* No translation (i.e. when loading kernel into simulator)`
143	997	markom	`/* PRINTF("transl_table=%x laddr=%x\n", transl_table, laddr);`
144			`PRINTF("laddr=%x\n", laddr);*/`
145	361	markom	`if (transl_table == 0)`
146			`return laddr;`
147
148			`/* Try to find our translation in the table. */`
149			`for(i = 0; i < (MEMORY_LEN / PAGE_SIZE) * 16; i += 16)`
150			`if ((laddr & ~(PAGE_SIZE - 1)) == evalsim_mem32(transl_table + i)) {`
151			`setsim_mem32(transl_table + i + 8, -2); /* Page modified */`
152	997	markom	`PRINTF("found paddr=%x\n", evalsim_mem32(transl_table + i + 4) \| (laddr & (PAGE_SIZE - 1)));`
153	361	markom	`return (unsigned long)evalsim_mem32(transl_table + i + 4) \| (laddr & (unsigned long)(PAGE_SIZE - 1));`
154			`}`
155	67	lampret
156	361	markom	`/* Allocate new phy page for us. */`
157			`for(i = 0; i < (MEMORY_LEN / PAGE_SIZE) * 16; i += 16)`
158			`if (evalsim_mem32(transl_table + i + 8) == 0) {`
159			`setsim_mem32(transl_table + i, laddr & ~(PAGE_SIZE - 1)); /* VPN */`
160			`setsim_mem32(transl_table + i + 4, (i/16) * PAGE_SIZE); /* PPN */`
161			`setsim_mem32(transl_table + i + 8, -2); /* Page modified */`
162	997	markom	`PRINTF("newly allocated ppn=%x\n", (unsigned long)evalsim_mem32(transl_table + i + 4));`
163			`PRINTF("newly allocated .ppn=%x\n", (unsigned long)transl_table + i + 4);`
164			`PRINTF("newly allocated ofs=%x\n", (unsigned long)(laddr & (PAGE_SIZE - 1)));`
165			`PRINTF("newly allocated paddr=%x\n", (unsigned long)evalsim_mem32(transl_table + i + 4) \| (laddr & (PAGE_SIZE - 1)));`
166	361	markom	`return (unsigned long)evalsim_mem32(transl_table + i + 4) \| (laddr & (unsigned long)(PAGE_SIZE - 1));`
167			`}`
168			`/* If we come this far then all phy memory is used and we can't find our page`
169			`nor allocate new page. */`
170			`transl_error = 1;`
171
172	997	markom	`PRINTF("can't translate\n", laddr);`
173	361	markom	`exit(1);`
174			`return -1;`
175	67	lampret	`}`
176
177	694	markom	`#if IMM_STATS`
178	703	markom	`int bcnt[33][3] = {0};`
179			`int bsum[3] = {0};`
180			`unsigned long movhi = 0;`
181	694	markom
182			`int bits (unsigned long val) {`
183			`int i = 1;`
184			`if (!val) return 0;`
185	703	markom	`while (val != 0 && (signed long)val != -1) {i++; val = (signed long)val >> 1;}`
186	694	markom	`return i;`
187			`}`
188
189			`void check_insn (unsigned long insn) {`
190			`int insn_index = insn_decode (insn);`
191			`struct insn_op_struct *opd = op_start[insn_index];`
192			`unsigned long data = 0;`
193			`int dis = 0;`
194	703	markom	`const char *name;`
195	694	markom	`if (!insn \|\| insn_index < 0) return;`
196			`name = insn_name (insn_index);`
197	703	markom	`if (strcmp (name, "l.nop") == 0 \|\| strcmp (name, "l.sys") == 0) return;`
198	694	markom
199			`while (1)`
200			`{`
201			`unsigned long tmp = 0, nbits = 0;`
202			`while (1)`
203			`{`
204			`tmp \|= ((insn >> (opd->type & OPTYPE_SHR)) & ((1 << opd->data) - 1)) << nbits;`
205			`nbits += opd->data;`
206			`if (opd->type & OPTYPE_OP)`
207			`break;`
208			`opd++;`
209			`}`
210
211			`/* Do we have to sign extend? */`
212			`if (opd->type & OPTYPE_SIG)`
213			`{`
214			`int sbit = (opd->type & OPTYPE_SBIT) >> OPTYPE_SBIT_SHR;`
215			`if (tmp & (1 << sbit))`
216			`tmp \|= 0xFFFFFFFF << sbit;`
217			`}`
218			`if (opd->type & OPTYPE_DIS) {`
219			`/* We have to read register later. */`
220			`data += tmp;`
221			`dis = 1;`
222			`} else`
223			`{`
224			`if (!(opd->type & OPTYPE_REG) \|\| dis) {`
225			`if (!dis) data = tmp;`
226	703	markom	`if (strcmp (name, "l.movhi") == 0) {`
227			`movhi = data << 16;`
228			`} else {`
229			`data \|= movhi;`
230	997	markom	`//PRINTF ("%08x %s\n", data, name);`
231	703	markom	`if (!(or32_opcodes[insn_index].flags & OR32_IF_DELAY)) {`
232			`bcnt[bits(data)][0]++; bsum[0]++;`
233			`} else {`
234			`if (strcmp (name, "l.bf") == 0 \|\| strcmp (name, "l.bnf") == 0) {`
235			`bcnt[bits(data)][1]++; bsum[1]++;`
236			`} else {`
237			`bcnt[bits(data)][2]++; bsum[2]++;`
238			`}`
239			`}`
240			`}`
241	694	markom	`}`
242			`data = 0;`
243			`dis = 0;`
244			`}`
245			`if(opd->type & OPTYPE_LAST) {`
246			`return;`
247			`}`
248			`opd++;`
249			`}`
250			`}`
251			`#endif`
252
253	28	lampret	`char null_str[1] = "\0";`
254
255	123	markom	`/* Replaced several calls to translate(freemem) with vaddr */`
256			`/* Added new mode execution code */`
257			`/* Changed parameters so address can be passed as argument */`
258	138	markom	`void addprogram(unsigned long address, unsigned long insn, int* breakpoint)`
259	2	cvs	`{`
260	138	markom	`char insn_first2_char[3];`
261	361	markom	`int vaddr = (!runtime.sim.filename) ? translate(address,breakpoint) : translate(freemem,breakpoint);`
262	138	markom
263			`setsim_mem32 (vaddr, insn);`
264	694	markom	`#if IMM_STATS`
265			`check_insn (insn);`
266			`#endif`
267	361	markom	`if(runtime.sim.filename)`
268	138	markom	`freemem += insn_len (insn_decode (insn));`
269	2	cvs	`}`
270
271	694	markom	`/* Load big-endian COFF file. */`
272	28	lampret
273			`void readfile_coff(char *filename, short sections)`
274			`{`
275	361	markom	`FILE *inputfs;`
276			`char inputbuf[4];`
277			`unsigned long insn;`
278			`signed long sectsize;`
279			`COFF_AOUTHDR coffaouthdr;`
280			`struct COFF_scnhdr coffscnhdr;`
281			`int len;`
282			`char item[MAXLINE_LEN];`
283			`char item2[MAXLINE_LEN];`
284			`int firstthree = 0;`
285			`int breakpoint = 0;`
286	123	markom
287	361	markom	`if (!(inputfs = fopen(filename, "r"))) {`
288			`perror("readfile_coff");`
289			`exit(1);`
290			`}`
291	28	lampret
292	361	markom	`if (fseek(inputfs, sizeof(struct COFF_filehdr), SEEK_SET) == -1) {`
293			`fclose(inputfs);`
294			`perror("readfile_coff");`
295			`exit(1);`
296			`}`
297	28	lampret
298	361	markom	`if (fread(&coffaouthdr, sizeof(coffaouthdr), 1, inputfs) != 1) {`
299			`fclose(inputfs);`
300			`perror("readfile_coff");`
301			`exit(1);`
302			`}`
303
304			`while(sections--) {`
305			`long scnhdr_pos = sizeof(struct COFF_filehdr) + sizeof(coffaouthdr)`
306			`+ sizeof(struct COFF_scnhdr) * firstthree;`
307			`if (fseek(inputfs, scnhdr_pos, SEEK_SET) == -1) {`
308			`fclose(inputfs);`
309			`perror("readfile_coff");`
310			`exit(1);`
311			`}`
312			`if (fread(&coffscnhdr, sizeof(struct COFF_scnhdr), 1, inputfs) != 1) {`
313			`fclose(inputfs);`
314			`perror("readfile_coff");`
315			`exit(1);`
316			`}`
317	997	markom	`PRINTF("Section: %s,", coffscnhdr.s_name);`
318			`PRINTF(" paddr: 0x%.8x,", COFF_LONG_H(coffscnhdr.s_paddr));`
319			`PRINTF(" vaddr: 0x%.8x,", COFF_LONG_H(coffscnhdr.s_vaddr));`
320			`PRINTF(" size: 0x%.8x,", COFF_LONG_H(coffscnhdr.s_size));`
321			`PRINTF(" scnptr: 0x%.8x\n", COFF_LONG_H(coffscnhdr.s_scnptr));`
322	361	markom
323			`sectsize = COFF_LONG_H(coffscnhdr.s_size);`
324	221	markom	`#if 0`
325	361	markom	`/* A couple of sanity checks. */`
326			`if (translate(COFF_LONG_H(coffscnhdr.s_vaddr),&breakpoint) < MEMORY_START) {`
327	997	markom	`PRINTF("Section %s starts out of ", coffscnhdr.s_name);`
328			`PRINTF("memory (at %x)\n", COFF_LONG_H(coffscnhdr.s_vaddr));`
329	361	markom	`exit(1);`
330			`}`
331			`if (translate(COFF_LONG_H(coffscnhdr.s_vaddr) + sectsize,&breakpoint) >`
332			`MEMORY_START + MEMORY_LEN) {`
333	997	markom	`PRINTF("Section %s ends out of ", coffscnhdr.s_name);`
334			`PRINTF("memory.\n");`
335	361	markom	`exit(1);`
336			`}`
337	221	markom	`#endif`
338	167	markom	`#if 0`
339	361	markom	`if (++firstthree == 1 && strcmp(coffscnhdr.s_name, ".text") != 0) {`
340	997	markom	`PRINTF("First section should be .text (%s instead)\n", coffscnhdr.s_name);`
341	361	markom	`exit(1);`
342			`}`
343			`if (firstthree == 2 && strcmp(coffscnhdr.s_name, ".data") != 0) {`
344	997	markom	`PRINTF("Second section should be .data (%s instead)\n", coffscnhdr.s_name);`
345	361	markom	`exit(1);`
346			`}`
347			`if (firstthree == 3 && strcmp(coffscnhdr.s_name, ".bss") != 0) {`
348	997	markom	`PRINTF("Third section should be .bss (%s instead)\n", coffscnhdr.s_name);`
349	361	markom	`exit(1);`
350			`}`
351	167	markom	`#else`
352	361	markom	`++firstthree;`
353	167	markom	`#endif`
354	28	lampret
355	361	markom	`/* loading section */`
356			`freemem = COFF_LONG_H(coffscnhdr.s_paddr);`
357			`debug(2,"Starting to load at 0x%x\n", freemem);`
358			`if (fseek(inputfs, COFF_LONG_H(coffscnhdr.s_scnptr), SEEK_SET) == -1) {`
359			`fclose(inputfs);`
360			`perror("readfile_coff");`
361			`exit(1);`
362			`}`
363			`while (sectsize > 0 && (len = fread(&inputbuf, sizeof(inputbuf), 1, inputfs))) {`
364			`insn = COFF_LONG_H(inputbuf);`
365			`len = insn_len (insn_decode (insn));`
366			`if (len == 2)`
367			`{`
368			`fseek(inputfs, -2, SEEK_CUR);`
369			`debug(8,"readfile_coff: %x 0x%x \n", sectsize, insn >> 16);`
370			`}`
371			`else`
372			`debug(8,"readfile_coff: %x 0x%x \n", sectsize, insn);`
373			`addprogram (freemem, insn, &breakpoint);`
374			`sectsize -= len;`
375			`}`
376			`}`
377			`if (firstthree < 3) {`
378	997	markom	`PRINTF("One or more missing sections. At least");`
379			`PRINTF(" three sections expected (.text, .data, .bss).\n");`
380	361	markom	`exit(1);`
381			`}`
382			`if (firstthree > 3) {`
383	997	markom	`PRINTF("Warning: one or more extra sections. These");`
384			`PRINTF(" sections were handled as .data sections.\n");`
385	361	markom	`}`
386	41	lampret
387	361	markom	`fclose(inputfs);`
388	997	markom	`PRINTF("Finished loading COFF.\n");`
389	361	markom	`return;`
390	28	lampret	`}`
391
392			`/* Load symbols from big-endian COFF file. */`
393
394			`void readsyms_coff(char *filename, unsigned long symptr, long syms)`
395			`{`
396	173	markom	`FILE *inputfs;`
397			`struct COFF_syment coffsymhdr;`
398			`int breakpoint = 0;`
399			`int count = 0;`
400			`long nsyms = syms;`
401			`if (!(inputfs = fopen(filename, "r"))) {`
402			`perror("readsyms_coff");`
403			`exit(1);`
404			`}`
405
406			`if (fseek(inputfs, symptr, SEEK_SET) == -1) {`
407			`fclose(inputfs);`
408			`perror("readsyms_coff");`
409			`exit(1);`
410			`}`
411
412			`while(syms--) {`
413			`int i, n;`
414			`if (fread(&coffsymhdr, COFF_SYMESZ, 1, inputfs) != 1) {`
415			`fclose(inputfs);`
416			`perror("readsyms_coff");`
417			`exit(1);`
418			`}`
419
420			`n = (unsigned char)coffsymhdr.e_numaux[0];`
421	513	markom
422			`/* check whether this symbol belongs to a section and is external symbol; ignore all others */`
423			`if (COFF_SHORT_H(coffsymhdr.e_scnum) >= 0 && coffsymhdr.e_sclass[0] == C_EXT) {`
424			`#if 0`
425	173	markom	`/* If not important or not in text, skip. */`
426	513	markom	`if(COFF_SHORT_H(coffsymhdr.e_type) & COFF_N_TMASK & COFF_STYP_TEXT) {`
427			`#endif`
428
429	173	markom	`if (((unsigned long )coffsymhdr.e.e.e_zeroes)) {`
430	513	markom	`if (strlen(coffsymhdr.e.e_name) && strlen(coffsymhdr.e.e_name) < 9)`
431			`add_label(COFF_LONG_H(coffsymhdr.e_value), coffsymhdr.e.e_name);`
432			`debug(8, "[%i] Symbol: %s,", count++, coffsymhdr.e.e_name);`
433	173	markom	`} else {`
434	513	markom	`long fpos = ftell (inputfs);`
435	361	markom
436	513	markom	`if (fseek(inputfs, symptr + nsyms * COFF_SYMESZ + COFF_LONG_H(coffsymhdr.e.e.e_offset), SEEK_SET) == 0) {`
437			`char tmp[33], *s = &tmp[0];`
438			`while (s != &tmp[32])`
439			`if ((*(s++) = fgetc(inputfs)) == 0) break;`
440			`tmp[32] = 0;`
441			`add_label(COFF_LONG_H(coffsymhdr.e_value), &tmp[0]);`
442			`debug(8, "[%i] Symbol: %s,", count++, &tmp[0]);`
443			`}`
444			`fseek(inputfs, fpos, SEEK_SET);`
445	173	markom	`}`
446
447	344	markom	`debug(9, " val: 0x%.8x,", COFF_LONG_H(coffsymhdr.e_value));`
448			`debug(9, " type: %x, %x, auxs: %i\n", COFF_SHORT_H(coffsymhdr.e_type), ((unsigned short )coffsymhdr.e_type), n);`
449	173	markom	`}`
450	28	lampret
451	173	markom	`for (i = 0; i < n; i++)`
452			`if (fread(&coffsymhdr, COFF_SYMESZ, 1, inputfs) != 1) {`
453	513	markom	`fclose(inputfs);`
454			`perror("readsyms_coff3");`
455			`exit(1);`
456	173	markom	`}`
457			`syms -= n;`
458			`count += n;`
459			`}`
460	28	lampret
461	173	markom	`fclose(inputfs);`
462	997	markom	`PRINTF("Finished loading symbols.\n");`
463	173	markom	`return;`
464	28	lampret	`}`
465
466	808	simons	`void readfile_elf(char *filename)`
467			`{`
468
469			`FILE *inputfs;`
470			`struct elf32_hdr elfhdr;`
471			`struct elf32_phdr *elf_phdata;`
472			`struct elf32_shdr elf_spnt, elf_shdata;`
473			`struct elf32_sym sym_tbl = (struct elf32_sym )0;`
474			`unsigned long syms = 0;`
475			`char str_tbl = (char )0;`
476			`char s_str = (char )0;`
477			`int breakpoint = 0;`
478			`unsigned long inputbuf;`
479			`unsigned long insn, padd;`
480			`int i, j, sectsize, len;`
481
482			`if (!(inputfs = fopen(filename, "r"))) {`
483			`perror("readfile_elf");`
484			`exit(1);`
485			`}`
486
487			`if (fread(&elfhdr, sizeof(elfhdr), 1, inputfs) != 1) {`
488			`perror("readfile_elf");`
489			`exit(1);`
490			`}`
491
492			`if ((elf_shdata = (struct elf32_shdr )malloc(ELF_SHORT_H(elfhdr.e_shentsize) ELF_SHORT_H(elfhdr.e_shnum))) == NULL) {`
493			`perror("readfile_elf");`
494			`exit(1);`
495			`}`
496
497			`if (fseek(inputfs, ELF_LONG_H(elfhdr.e_shoff), SEEK_SET) != 0) {`
498			`perror("readfile_elf");`
499			`exit(1);`
500			`}`

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