text: /****************************************************************************/
  /*
   *  QEMU bFLT binary loader.  Based on linux/fs/binfmt_flat.c
   *
   *  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, see <http://www.gnu.org/licenses/>.
   *
   *      Copyright (C) 2006 CodeSourcery.
   *	Copyright (C) 2000-2003 David McCullough <davidm@snapgear.com>
   *	Copyright (C) 2002 Greg Ungerer <gerg@snapgear.com>
   *	Copyright (C) 2002 SnapGear, by Paul Dale <pauli@snapgear.com>
   *	Copyright (C) 2000, 2001 Lineo, by David McCullough <davidm@lineo.com>
   *  based heavily on:
   *
   *  linux/fs/binfmt_aout.c:
   *      Copyright (C) 1991, 1992, 1996  Linus Torvalds
   *  linux/fs/binfmt_flat.c for 2.0 kernel
   *	    Copyright (C) 1998  Kenneth Albanowski <kjahds@kjahds.com>
   *	JAN/99 -- coded full program relocation (gerg@snapgear.com)
   */
  
  /* ??? ZFLAT and shared library support is currently disabled.  */
  
  /****************************************************************************/
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <errno.h>
  #include <sys/mman.h>
  #include <unistd.h>
  
  #include "qemu.h"
  #include "flat.h"
  #define ntohl(x) be32_to_cpu(x)
  #include <target_flat.h>
  
  //#define DEBUG
  
  #ifdef DEBUG
  #define	DBG_FLT(...)	printf(__VA_ARGS__)
  #else
  #define	DBG_FLT(...)
  #endif
  
  #define RELOC_FAILED 0xff00ff01		/* Relocation incorrect somewhere */
  #define UNLOADED_LIB 0x7ff000ff		/* Placeholder for unused library */
  
  struct lib_info {
      abi_ulong start_code;       /* Start of text segment */
      abi_ulong start_data;       /* Start of data segment */
      abi_ulong end_data;         /* Start of bss section */
      abi_ulong start_brk;        /* End of data segment */
      abi_ulong text_len;	        /* Length of text segment */
      abi_ulong entry;	        /* Start address for this module */
      abi_ulong build_date;       /* When this one was compiled */
      short loaded;		/* Has this library been loaded? */
  };
  
  #ifdef CONFIG_BINFMT_SHARED_FLAT
  static int load_flat_shared_library(int id, struct lib_info *p);
  #endif
  
  struct linux_binprm;
  
  /****************************************************************************/
  /*
   * create_flat_tables() parses the env- and arg-strings in new user
   * memory and creates the pointer tables from them, and puts their
   * addresses on the "stack", returning the new stack pointer value.
   */
  
  /* Push a block of strings onto the guest stack.  */
  static abi_ulong copy_strings(abi_ulong p, int n, char **s)
  {
      int len;
  
      while (n-- > 0) {
          len = strlen(s[n]) + 1;
          p -= len;
          memcpy_to_target(p, s[n], len);
      }
  
      return p;
  }
  
  static int target_pread(int fd, abi_ulong ptr, abi_ulong len,
                          abi_ulong offset)
  {
      void *buf;
      int ret;
  
      buf = lock_user(VERIFY_WRITE, ptr, len, 0);
      ret = pread(fd, buf, len, offset);
      unlock_user(buf, ptr, len);
      return ret;
  }
  /****************************************************************************/
  
  #ifdef CONFIG_BINFMT_ZFLAT
  
  #include <linux/zlib.h>
  
  #define LBUFSIZE	4000
  
  /* gzip flag byte */
  #define ASCII_FLAG   0x01 /* bit 0 set: file probably ASCII text */
  #define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
  #define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */
  #define ORIG_NAME    0x08 /* bit 3 set: original file name present */
  #define COMMENT      0x10 /* bit 4 set: file comment present */
  #define ENCRYPTED    0x20 /* bit 5 set: file is encrypted */
  #define RESERVED     0xC0 /* bit 6,7:   reserved */
  
  static int decompress_exec(
  	struct linux_binprm *bprm,
  	unsigned long offset,
  	char *dst,
  	long len,
  	int fd)
  {
  	unsigned char *buf;
  	z_stream strm;
  	loff_t fpos;
  	int ret, retval;
  
  	DBG_FLT("decompress_exec(offset=%x,buf=%x,len=%x)\n",(int)offset, (int)dst, (int)len);
  
  	memset(&strm, 0, sizeof(strm));
  	strm.workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL);
  	if (strm.workspace == NULL) {
  		DBG_FLT("binfmt_flat: no memory for decompress workspace\n");
  		return -ENOMEM;
  	}
  	buf = kmalloc(LBUFSIZE, GFP_KERNEL);
  	if (buf == NULL) {
  		DBG_FLT("binfmt_flat: no memory for read buffer\n");
  		retval = -ENOMEM;
  		goto out_free;
  	}
  
  	/* Read in first chunk of data and parse gzip header. */
  	fpos = offset;
  	ret = bprm->file->f_op->read(bprm->file, buf, LBUFSIZE, &fpos);
  
  	strm.next_in = buf;
  	strm.avail_in = ret;
  	strm.total_in = 0;
  
  	retval = -ENOEXEC;
  
  	/* Check minimum size -- gzip header */
  	if (ret < 10) {
  		DBG_FLT("binfmt_flat: file too small?\n");
  		goto out_free_buf;
  	}
  
  	/* Check gzip magic number */
  	if ((buf[0] != 037) || ((buf[1] != 0213) && (buf[1] != 0236))) {
  		DBG_FLT("binfmt_flat: unknown compression magic?\n");
  		goto out_free_buf;
  	}
  
  	/* Check gzip method */
  	if (buf[2] != 8) {
  		DBG_FLT("binfmt_flat: unknown compression method?\n");
  		goto out_free_buf;
  	}
  	/* Check gzip flags */
  	if ((buf[3] & ENCRYPTED) || (buf[3] & CONTINUATION) ||
  	    (buf[3] & RESERVED)) {
  		DBG_FLT("binfmt_flat: unknown flags?\n");
  		goto out_free_buf;
  	}
  
  	ret = 10;
  	if (buf[3] & EXTRA_FIELD) {
  		ret += 2 + buf[10] + (buf[11] << 8);
  		if (unlikely(LBUFSIZE == ret)) {
  			DBG_FLT("binfmt_flat: buffer overflow (EXTRA)?\n");
  			goto out_free_buf;
  		}
  	}
  	if (buf[3] & ORIG_NAME) {
  		for (; ret < LBUFSIZE && (buf[ret] != 0); ret++)
  			;
  		if (unlikely(LBUFSIZE == ret)) {
  			DBG_FLT("binfmt_flat: buffer overflow (ORIG_NAME)?\n");
  			goto out_free_buf;
  		}
  	}
  	if (buf[3] & COMMENT) {
  		for (;  ret < LBUFSIZE && (buf[ret] != 0); ret++)
  			;
  		if (unlikely(LBUFSIZE == ret)) {
  			DBG_FLT("binfmt_flat: buffer overflow (COMMENT)?\n");
  			goto out_free_buf;
  		}
  	}
  
  	strm.next_in += ret;
  	strm.avail_in -= ret;
  
  	strm.next_out = dst;
  	strm.avail_out = len;
  	strm.total_out = 0;
  
  	if (zlib_inflateInit2(&strm, -MAX_WBITS) != Z_OK) {
  		DBG_FLT("binfmt_flat: zlib init failed?\n");
  		goto out_free_buf;
  	}
  
  	while ((ret = zlib_inflate(&strm, Z_NO_FLUSH)) == Z_OK) {
  		ret = bprm->file->f_op->read(bprm->file, buf, LBUFSIZE, &fpos);
  		if (ret <= 0)
  			break;
  		if (ret >= (unsigned long) -4096)
  			break;
  		len -= ret;
  
  		strm.next_in = buf;
  		strm.avail_in = ret;
  		strm.total_in = 0;
  	}
  
  	if (ret < 0) {
  		DBG_FLT("binfmt_flat: decompression failed (%d), %s\n",
  			ret, strm.msg);
  		goto out_zlib;
  	}
  
  	retval = 0;
  out_zlib:
  	zlib_inflateEnd(&strm);
  out_free_buf:
  	kfree(buf);
  out_free:
  	kfree(strm.workspace);
  out:
  	return retval;
  }
  
  #endif /* CONFIG_BINFMT_ZFLAT */
  
  /****************************************************************************/
  
  static abi_ulong
  calc_reloc(abi_ulong r, struct lib_info *p, int curid, int internalp)
  {
      abi_ulong addr;
      int id;
      abi_ulong start_brk;
      abi_ulong start_data;
      abi_ulong text_len;
      abi_ulong start_code;
  
  #ifdef CONFIG_BINFMT_SHARED_FLAT
  #error needs checking
      if (r == 0)
          id = curid;	/* Relocs of 0 are always self referring */
      else {
          id = (r >> 24) & 0xff;	/* Find ID for this reloc */
          r &= 0x00ffffff;	/* Trim ID off here */
      }
      if (id >= MAX_SHARED_LIBS) {
          fprintf(stderr, "BINFMT_FLAT: reference 0x%x to shared library %d\n",
                  (unsigned) r, id);
          goto failed;
      }
      if (curid != id) {
          if (internalp) {
              fprintf(stderr, "BINFMT_FLAT: reloc address 0x%x not "
                      "in same module (%d != %d)\n",
                      (unsigned) r, curid, id);
              goto failed;
          } else if ( ! p[id].loaded &&
                      load_flat_shared_library(id, p) > (unsigned long) -4096) {
              fprintf(stderr, "BINFMT_FLAT: failed to load library %d\n", id);
              goto failed;
          }
          /* Check versioning information (i.e. time stamps) */
          if (p[id].build_date && p[curid].build_date
              && p[curid].build_date < p[id].build_date) {
              fprintf(stderr, "BINFMT_FLAT: library %d is younger than %d\n",
                      id, curid);
              goto failed;
          }
      }
  #else
      id = 0;
  #endif
  
      start_brk = p[id].start_brk;
      start_data = p[id].start_data;
      start_code = p[id].start_code;
      text_len = p[id].text_len;
  
      if (!flat_reloc_valid(r, start_brk - start_data + text_len)) {
          fprintf(stderr, "BINFMT_FLAT: reloc outside program 0x%x "
                  "(0 - 0x%x/0x%x)\n",
                 (int) r,(int)(start_brk-start_code),(int)text_len);
          goto failed;
      }
  
      if (r < text_len)			/* In text segment */
          addr = r + start_code;
      else					/* In data segment */
          addr = r - text_len + start_data;
  
      /* Range checked already above so doing the range tests is redundant...*/
      return(addr);
  
  failed:
      abort();
      return RELOC_FAILED;
  }
  
  /****************************************************************************/
  
  /* ??? This does not handle endianness correctly.  */
  static void old_reloc(struct lib_info *libinfo, uint32_t rl)
  {
  #ifdef DEBUG
  	const char *segment[] = { "TEXT", "DATA", "BSS", "*UNKNOWN*" };
  #endif
  	uint32_t *ptr;
          uint32_t offset;
          int reloc_type;
  
          offset = rl & 0x3fffffff;
          reloc_type = rl >> 30;
          /* ??? How to handle this?  */
  #if defined(CONFIG_COLDFIRE)
  	ptr = (uint32_t *) ((unsigned long) libinfo->start_code + offset);
  #else
  	ptr = (uint32_t *) ((unsigned long) libinfo->start_data + offset);
  #endif
  
  #ifdef DEBUG
  	fprintf(stderr, "Relocation of variable at DATASEG+%x "
  		"(address %p, currently %x) into segment %s\n",
  		offset, ptr, (int)*ptr, segment[reloc_type]);
  #endif
  
  	switch (reloc_type) {
  	case OLD_FLAT_RELOC_TYPE_TEXT:
  		*ptr += libinfo->start_code;
  		break;
  	case OLD_FLAT_RELOC_TYPE_DATA:
  		*ptr += libinfo->start_data;
  		break;
  	case OLD_FLAT_RELOC_TYPE_BSS:
  		*ptr += libinfo->end_data;
  		break;
  	default:
  		fprintf(stderr, "BINFMT_FLAT: Unknown relocation type=%x\n",
                          reloc_type);
  		break;
  	}
  	DBG_FLT("Relocation became %x\n", (int)*ptr);
  }
  
  /****************************************************************************/
  
  static int load_flat_file(struct linux_binprm * bprm,
  		struct lib_info *libinfo, int id, abi_ulong *extra_stack)
  {
      struct flat_hdr * hdr;
      abi_ulong textpos = 0, datapos = 0;
      abi_long result;
      abi_ulong realdatastart = 0;
      abi_ulong text_len, data_len, bss_len, stack_len, flags;
      abi_ulong memp = 0; /* for finding the brk area */
      abi_ulong extra;
      abi_ulong reloc = 0, rp;
      int i, rev, relocs = 0;
      abi_ulong fpos;
      abi_ulong start_code, end_code;
      abi_ulong indx_len;
  
      hdr = ((struct flat_hdr *) bprm->buf);		/* exec-header */
  
      text_len  = ntohl(hdr->data_start);
      data_len  = ntohl(hdr->data_end) - ntohl(hdr->data_start);
      bss_len   = ntohl(hdr->bss_end) - ntohl(hdr->data_end);
      stack_len = ntohl(hdr->stack_size);
      if (extra_stack) {
          stack_len += *extra_stack;
          *extra_stack = stack_len;
      }
      relocs    = ntohl(hdr->reloc_count);
      flags     = ntohl(hdr->flags);
      rev       = ntohl(hdr->rev);
  
      DBG_FLT("BINFMT_FLAT: Loading file: %s\n", bprm->filename);
  
      if (rev != FLAT_VERSION && rev != OLD_FLAT_VERSION) {
          fprintf(stderr, "BINFMT_FLAT: bad magic/rev (0x%x, need 0x%x)\n",
                  rev, (int) FLAT_VERSION);
          return -ENOEXEC;
      }
  
      /* Don't allow old format executables to use shared libraries */
      if (rev == OLD_FLAT_VERSION && id != 0) {
          fprintf(stderr, "BINFMT_FLAT: shared libraries are not available\n");
          return -ENOEXEC;
      }
  
      /*
       * fix up the flags for the older format,  there were all kinds
       * of endian hacks,  this only works for the simple cases
       */
      if (rev == OLD_FLAT_VERSION && flat_old_ram_flag(flags))
          flags = FLAT_FLAG_RAM;
  
  #ifndef CONFIG_BINFMT_ZFLAT
      if (flags & (FLAT_FLAG_GZIP|FLAT_FLAG_GZDATA)) {
          fprintf(stderr, "Support for ZFLAT executables is not enabled\n");
          return -ENOEXEC;
      }
  #endif
  
      /*
       * calculate the extra space we need to map in
       */
      extra = relocs * sizeof(abi_ulong);
      if (extra < bss_len + stack_len)
          extra = bss_len + stack_len;
  
      /* Add space for library base pointers.  Make sure this does not
         misalign the  doesn't misalign the data segment.  */
      indx_len = MAX_SHARED_LIBS * sizeof(abi_ulong);
      indx_len = (indx_len + 15) & ~(abi_ulong)15;
  
      /*
       * there are a couple of cases here,  the separate code/data
       * case,  and then the fully copied to RAM case which lumps
       * it all together.
       */
      if ((flags & (FLAT_FLAG_RAM|FLAT_FLAG_GZIP)) == 0) {
          /*
           * this should give us a ROM ptr,  but if it doesn't we don't
           * really care
           */
          DBG_FLT("BINFMT_FLAT: ROM mapping of file (we hope)\n");
  
          textpos = target_mmap(0, text_len, PROT_READ|PROT_EXEC,
                                MAP_PRIVATE, bprm->fd, 0);
          if (textpos == -1) {
              fprintf(stderr, "Unable to mmap process text\n");
              return -1;
          }
  
          realdatastart = target_mmap(0, data_len + extra + indx_len,
                                      PROT_READ|PROT_WRITE|PROT_EXEC,
                                      MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  
          if (realdatastart == -1) {
              fprintf(stderr, "Unable to allocate RAM for process data\n");
              return realdatastart;
          }
          datapos = realdatastart + indx_len;
  
          DBG_FLT("BINFMT_FLAT: Allocated data+bss+stack (%d bytes): %x\n",
                          (int)(data_len + bss_len + stack_len), (int)datapos);
  
          fpos = ntohl(hdr->data_start);
  #ifdef CONFIG_BINFMT_ZFLAT
          if (flags & FLAT_FLAG_GZDATA) {
              result = decompress_exec(bprm, fpos, (char *) datapos,
                                       data_len + (relocs * sizeof(abi_ulong)))
          } else
  #endif
          {
              result = target_pread(bprm->fd, datapos,
                                    data_len + (relocs * sizeof(abi_ulong)),
                                    fpos);
          }
          if (result < 0) {
              fprintf(stderr, "Unable to read data+bss\n");
              return result;
          }
  
          reloc = datapos + (ntohl(hdr->reloc_start) - text_len);
          memp = realdatastart;
  
      } else {
  
          textpos = target_mmap(0, text_len + data_len + extra + indx_len,
                                PROT_READ | PROT_EXEC | PROT_WRITE,
                                MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
          if (textpos == -1 ) {
              fprintf(stderr, "Unable to allocate RAM for process text/data\n");
              return -1;
          }
  
          realdatastart = textpos + ntohl(hdr->data_start);
          datapos = realdatastart + indx_len;
          reloc = (textpos + ntohl(hdr->reloc_start) + indx_len);
          memp = textpos;
  
  #ifdef CONFIG_BINFMT_ZFLAT
  #error code needs checking
          /*
           * load it all in and treat it like a RAM load from now on
           */
          if (flags & FLAT_FLAG_GZIP) {
                  result = decompress_exec(bprm, sizeof (struct flat_hdr),
                                   (((char *) textpos) + sizeof (struct flat_hdr)),
                                   (text_len + data_len + (relocs * sizeof(unsigned long))
                                            - sizeof (struct flat_hdr)),
                                   0);
                  memmove((void *) datapos, (void *) realdatastart,
                                  data_len + (relocs * sizeof(unsigned long)));
          } else if (flags & FLAT_FLAG_GZDATA) {
                  fpos = 0;
                  result = bprm->file->f_op->read(bprm->file,
                                  (char *) textpos, text_len, &fpos);
                  if (result < (unsigned long) -4096)
                          result = decompress_exec(bprm, text_len, (char *) datapos,
                                           data_len + (relocs * sizeof(unsigned long)), 0);
          }
          else
  #endif
          {
              result = target_pread(bprm->fd, textpos,
                                    text_len, 0);
              if (result >= 0) {
                  result = target_pread(bprm->fd, datapos,
                      data_len + (relocs * sizeof(abi_ulong)),
                      ntohl(hdr->data_start));
              }
          }
          if (result < 0) {
              fprintf(stderr, "Unable to read code+data+bss\n");
              return result;
          }
      }
  
      DBG_FLT("Mapping is 0x%x, Entry point is 0x%x, data_start is 0x%x\n",
              (int)textpos, 0x00ffffff&ntohl(hdr->entry),
              ntohl(hdr->data_start));
  
      /* The main program needs a little extra setup in the task structure */
      start_code = textpos + sizeof (struct flat_hdr);
      end_code = textpos + text_len;
  
      DBG_FLT("%s %s: TEXT=%x-%x DATA=%x-%x BSS=%x-%x\n",
              id ? "Lib" : "Load", bprm->filename,
              (int) start_code, (int) end_code,
              (int) datapos,
              (int) (datapos + data_len),
              (int) (datapos + data_len),
              (int) (((datapos + data_len + bss_len) + 3) & ~3));
  
      text_len -= sizeof(struct flat_hdr); /* the real code len */
  
      /* Store the current module values into the global library structure */
      libinfo[id].start_code = start_code;
      libinfo[id].start_data = datapos;
      libinfo[id].end_data = datapos + data_len;
      libinfo[id].start_brk = datapos + data_len + bss_len;
      libinfo[id].text_len = text_len;
      libinfo[id].loaded = 1;
      libinfo[id].entry = (0x00ffffff & ntohl(hdr->entry)) + textpos;
      libinfo[id].build_date = ntohl(hdr->build_date);
  
      /*
       * We just load the allocations into some temporary memory to
       * help simplify all this mumbo jumbo
       *
       * We've got two different sections of relocation entries.
       * The first is the GOT which resides at the begining of the data segment
       * and is terminated with a -1.  This one can be relocated in place.
       * The second is the extra relocation entries tacked after the image's
       * data segment. These require a little more processing as the entry is
       * really an offset into the image which contains an offset into the
       * image.
       */
      if (flags & FLAT_FLAG_GOTPIC) {
          rp = datapos;
          while (1) {
              abi_ulong addr;
              if (get_user_ual(addr, rp))
                  return -EFAULT;
              if (addr == -1)
                  break;
              if (addr) {
                  addr = calc_reloc(addr, libinfo, id, 0);
                  if (addr == RELOC_FAILED)
                      return -ENOEXEC;
                  if (put_user_ual(addr, rp))
                      return -EFAULT;
              }
              rp += sizeof(abi_ulong);
          }
      }
  
      /*
       * Now run through the relocation entries.
       * We've got to be careful here as C++ produces relocatable zero
       * entries in the constructor and destructor tables which are then
       * tested for being not zero (which will always occur unless we're
       * based from address zero).  This causes an endless loop as __start
       * is at zero.  The solution used is to not relocate zero addresses.
       * This has the negative side effect of not allowing a global data
       * reference to be statically initialised to _stext (I've moved
       * __start to address 4 so that is okay).
       */
      if (rev > OLD_FLAT_VERSION) {
          abi_ulong persistent = 0;
          for (i = 0; i < relocs; i++) {
              abi_ulong addr, relval;
  
              /* Get the address of the pointer to be
                 relocated (of course, the address has to be
                 relocated first).  */
              if (get_user_ual(relval, reloc + i * sizeof(abi_ulong)))
                  return -EFAULT;
              relval = ntohl(relval);
              if (flat_set_persistent(relval, &persistent))
                  continue;
              addr = flat_get_relocate_addr(relval);
              rp = calc_reloc(addr, libinfo, id, 1);
              if (rp == RELOC_FAILED)
                  return -ENOEXEC;
  
              /* Get the pointer's value.  */
              if (get_user_ual(addr, rp))
                  return -EFAULT;
              addr = flat_get_addr_from_rp(rp, relval, flags, &persistent);
              if (addr != 0) {
                  /*
                   * Do the relocation.  PIC relocs in the data section are
                   * already in target order
                   */
                  if ((flags & FLAT_FLAG_GOTPIC) == 0)
                      addr = ntohl(addr);
                  addr = calc_reloc(addr, libinfo, id, 0);
                  if (addr == RELOC_FAILED)
                      return -ENOEXEC;
  
                  /* Write back the relocated pointer.  */
                  if (flat_put_addr_at_rp(rp, addr, relval))
                      return -EFAULT;
              }
          }
      } else {
          for (i = 0; i < relocs; i++) {
              abi_ulong relval;
              if (get_user_ual(relval, reloc + i * sizeof(abi_ulong)))
                  return -EFAULT;
              old_reloc(&libinfo[0], relval);
          }
      }
  
      /* zero the BSS.  */
      memset((void *)((unsigned long)datapos + data_len), 0, bss_len);
  
      return 0;
  }
  
  
  /****************************************************************************/
  #ifdef CONFIG_BINFMT_SHARED_FLAT
  
  /*
   * Load a shared library into memory.  The library gets its own data
   * segment (including bss) but not argv/argc/environ.
   */
  
  static int load_flat_shared_library(int id, struct lib_info *libs)
  {
  	struct linux_binprm bprm;
  	int res;
  	char buf[16];
  
  	/* Create the file name */
  	sprintf(buf, "/lib/lib%d.so", id);
  
  	/* Open the file up */
  	bprm.filename = buf;
  	bprm.file = open_exec(bprm.filename);
  	res = PTR_ERR(bprm.file);
  	if (IS_ERR(bprm.file))
  		return res;
  
  	res = prepare_binprm(&bprm);
  
  	if (res <= (unsigned long)-4096)
  		res = load_flat_file(&bprm, libs, id, NULL);
  	if (bprm.file) {
  		allow_write_access(bprm.file);
  		fput(bprm.file);
  		bprm.file = NULL;
  	}
  	return(res);
  }
  
  #endif /* CONFIG_BINFMT_SHARED_FLAT */
  
  int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
                      struct image_info * info)
  {
      struct lib_info libinfo[MAX_SHARED_LIBS];
      abi_ulong p = bprm->p;
      abi_ulong stack_len;
      abi_ulong start_addr;
      abi_ulong sp;
      int res;
      int i, j;
  
      memset(libinfo, 0, sizeof(libinfo));
      /*
       * We have to add the size of our arguments to our stack size
       * otherwise it's too easy for users to create stack overflows
       * by passing in a huge argument list.  And yes,  we have to be
       * pedantic and include space for the argv/envp array as it may have
       * a lot of entries.
       */
      stack_len = 0;
      for (i = 0; i < bprm->argc; ++i) {
          /* the argv strings */
          stack_len += strlen(bprm->argv[i]);
      }
      for (i = 0; i < bprm->envc; ++i) {
          /* the envp strings */
          stack_len += strlen(bprm->envp[i]);
      }
      stack_len += (bprm->argc + 1) * 4; /* the argv array */
      stack_len += (bprm->envc + 1) * 4; /* the envp array */
  
  
      res = load_flat_file(bprm, libinfo, 0, &stack_len);
      if (res > (unsigned long)-4096)
              return res;
  
      /* Update data segment pointers for all libraries */
      for (i=0; i<MAX_SHARED_LIBS; i++) {
          if (libinfo[i].loaded) {
              abi_ulong p;
              p = libinfo[i].start_data;
              for (j=0; j<MAX_SHARED_LIBS; j++) {
                  p -= 4;
                  /* FIXME - handle put_user() failures */
                  if (put_user_ual(libinfo[j].loaded
                                   ? libinfo[j].start_data
                                   : UNLOADED_LIB,
                                   p))
                      return -EFAULT;
              }
          }
      }
  
      p = ((libinfo[0].start_brk + stack_len + 3) & ~3) - 4;
      DBG_FLT("p=%x\n", (int)p);
  
      /* Copy argv/envp.  */
      p = copy_strings(p, bprm->envc, bprm->envp);
      p = copy_strings(p, bprm->argc, bprm->argv);
      /* Align stack.  */
      sp = p & ~(abi_ulong)(sizeof(abi_ulong) - 1);
      /* Enforce final stack alignment of 16 bytes.  This is sufficient
         for all current targets, and excess alignment is harmless.  */
      stack_len = bprm->envc + bprm->argc + 2;
      stack_len += 3;	/* argc, arvg, argp */
      stack_len *= sizeof(abi_ulong);
      if ((sp + stack_len) & 15)
          sp -= 16 - ((sp + stack_len) & 15);
      sp = loader_build_argptr(bprm->envc, bprm->argc, sp, p,
                               flat_argvp_envp_on_stack());
  
      /* Fake some return addresses to ensure the call chain will
       * initialise library in order for us.  We are required to call
       * lib 1 first, then 2, ... and finally the main program (id 0).
       */
      start_addr = libinfo[0].entry;
  
  #ifdef CONFIG_BINFMT_SHARED_FLAT
  #error here
      for (i = MAX_SHARED_LIBS-1; i>0; i--) {
              if (libinfo[i].loaded) {
                      /* Push previos first to call address */
                      --sp;
                      if (put_user_ual(start_addr, sp))
                          return -EFAULT;
                      start_addr = libinfo[i].entry;
              }
      }
  #endif
  
      /* Stash our initial stack pointer into the mm structure */
      info->start_code = libinfo[0].start_code;
      info->end_code = libinfo[0].start_code = libinfo[0].text_len;
      info->start_data = libinfo[0].start_data;
      info->end_data = libinfo[0].end_data;
      info->start_brk = libinfo[0].start_brk;
      info->start_stack = sp;
      info->stack_limit = libinfo[0].start_brk;
      info->entry = start_addr;
      info->code_offset = info->start_code;
      info->data_offset = info->start_data - libinfo[0].text_len;
  
      DBG_FLT("start_thread(entry=0x%x, start_stack=0x%x)\n",
              (int)info->entry, (int)info->start_stack);
  
      return 0;
  }
  