Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 901 insertions, 0 deletions

diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
new file mode 100644
index 000000000000..f0cd67d9d31b
--- /dev/null
+++ b/fs/binfmt_flat.c
@@ -0,0 +1,901 @@
+/****************************************************************************/
+/*
+ *  linux/fs/binfmt_flat.c
+ *
+ *      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)
+ */
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/a.out.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/stat.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/user.h>
+#include <linux/slab.h>
+#include <linux/binfmts.h>
+#include <linux/personality.h>
+#include <linux/init.h>
+#include <linux/flat.h>
+
+#include <asm/byteorder.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+#include <asm/cacheflush.h>
+
+/****************************************************************************/
+
+#if 0
+#define DEBUG 1
+#endif
+
+#ifdef DEBUG
+#define DBG_FLT(a...)   printk(a)
+#else
+#define DBG_FLT(a...)
+#endif
+
+#define RELOC_FAILED 0xff00ff01         /* Relocation incorrect somewhere */
+#define UNLOADED_LIB 0x7ff000ff         /* Placeholder for unused library */
+
+struct lib_info {
+        struct {
+                unsigned long start_code;               /* Start of text segment */
+                unsigned long start_data;               /* Start of data segment */
+                unsigned long start_brk;                /* End of data segment */
+                unsigned long text_len;                 /* Length of text segment */
+                unsigned long entry;                    /* Start address for this module */
+                unsigned long build_date;               /* When this one was compiled */
+                short loaded;                           /* Has this library been loaded? */
+        } lib_list[MAX_SHARED_LIBS];
+};
+
+#ifdef CONFIG_BINFMT_SHARED_FLAT
+static int load_flat_shared_library(int id, struct lib_info *p);
+#endif
+
+static int load_flat_binary(struct linux_binprm *, struct pt_regs * regs);
+static int flat_core_dump(long signr, struct pt_regs * regs, struct file *file);
+
+extern void dump_thread(struct pt_regs *, struct user *);
+
+static struct linux_binfmt flat_format = {
+        .module         = THIS_MODULE,
+        .load_binary    = load_flat_binary,
+        .core_dump      = flat_core_dump,
+        .min_coredump   = PAGE_SIZE
+};
+
+/****************************************************************************/
+/*
+ * Routine writes a core dump image in the current directory.
+ * Currently only a stub-function.
+ */
+
+static int flat_core_dump(long signr, struct pt_regs * regs, struct file *file)
+{
+        printk("Process %s:%d received signr %d and should have core dumped\n",
+                        current->comm, current->pid, (int) signr);
+        return(1);
+}
+
+/****************************************************************************/
+/*
+ * 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.
+ */
+
+static unsigned long create_flat_tables(
+        unsigned long pp,
+        struct linux_binprm * bprm)
+{
+        unsigned long *argv,*envp;
+        unsigned long * sp;
+        char * p = (char*)pp;
+        int argc = bprm->argc;
+        int envc = bprm->envc;
+        char dummy;
+
+        sp = (unsigned long *) ((-(unsigned long)sizeof(char *))&(unsigned long) p);
+
+        sp -= envc+1;
+        envp = sp;
+        sp -= argc+1;
+        argv = sp;
+
+        flat_stack_align(sp);
+        if (flat_argvp_envp_on_stack()) {
+                --sp; put_user((unsigned long) envp, sp);
+                --sp; put_user((unsigned long) argv, sp);
+        }
+
+        put_user(argc,--sp);
+        current->mm->arg_start = (unsigned long) p;
+        while (argc-->0) {
+                put_user((unsigned long) p, argv++);
+                do {
+                        get_user(dummy, p); p++;
+                } while (dummy);
+        }
+        put_user((unsigned long) NULL, argv);
+        current->mm->arg_end = current->mm->env_start = (unsigned long) p;
+        while (envc-->0) {
+                put_user((unsigned long)p, envp); envp++;
+                do {
+                        get_user(dummy, p); p++;
+                } while (dummy);
+        }
+        put_user((unsigned long) NULL, envp);
+        current->mm->env_end = (unsigned long) p;
+        return (unsigned long)sp;
+}
+
+/****************************************************************************/
+
+#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 unsigned long
+calc_reloc(unsigned long r, struct lib_info *p, int curid, int internalp)
+{
+        unsigned long addr;
+        int id;
+        unsigned long start_brk;
+        unsigned long start_data;
+        unsigned long text_len;
+        unsigned long start_code;
+
+#ifdef CONFIG_BINFMT_SHARED_FLAT
+        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) {
+                printk("BINFMT_FLAT: reference 0x%x to shared library %d",
+                                (unsigned) r, id);
+                goto failed;
+        }
+        if (curid != id) {
+                if (internalp) {
+                        printk("BINFMT_FLAT: reloc address 0x%x not in same module "
+                                        "(%d != %d)", (unsigned) r, curid, id);
+                        goto failed;
+                } else if ( ! p->lib_list[id].loaded &&
+                                load_flat_shared_library(id, p) > (unsigned long) -4096) {
+                        printk("BINFMT_FLAT: failed to load library %d", id);
+                        goto failed;
+                }
+                /* Check versioning information (i.e. time stamps) */
+                if (p->lib_list[id].build_date && p->lib_list[curid].build_date &&
+                                p->lib_list[curid].build_date < p->lib_list[id].build_date) {
+                        printk("BINFMT_FLAT: library %d is younger than %d", id, curid);
+                        goto failed;
+                }
+        }
+#else
+        id = 0;
+#endif
+
+        start_brk = p->lib_list[id].start_brk;
+        start_data = p->lib_list[id].start_data;
+        start_code = p->lib_list[id].start_code;
+        text_len = p->lib_list[id].text_len;
+
+        if (!flat_reloc_valid(r, start_brk - start_data + text_len)) {
+                printk("BINFMT_FLAT: reloc outside program 0x%x (0 - 0x%x/0x%x)",
+                       (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:
+        printk(", killing %s!\n", current->comm);
+        send_sig(SIGSEGV, current, 0);
+
+        return RELOC_FAILED;
+}
+
+/****************************************************************************/
+
+void old_reloc(unsigned long rl)
+{
+#ifdef DEBUG
+        char *segment[] = { "TEXT", "DATA", "BSS", "*UNKNOWN*" };
+#endif
+        flat_v2_reloc_t r;
+        unsigned long *ptr;
+        
+        r.value = rl;
+#if defined(CONFIG_COLDFIRE)
+        ptr = (unsigned long *) (current->mm->start_code + r.reloc.offset);
+#else
+        ptr = (unsigned long *) (current->mm->start_data + r.reloc.offset);
+#endif
+
+#ifdef DEBUG
+        printk("Relocation of variable at DATASEG+%x "
+                "(address %p, currently %x) into segment %s\n",
+                r.reloc.offset, ptr, (int)*ptr, segment[r.reloc.type]);
+#endif
+        
+        switch (r.reloc.type) {
+        case OLD_FLAT_RELOC_TYPE_TEXT:
+                *ptr += current->mm->start_code;
+                break;
+        case OLD_FLAT_RELOC_TYPE_DATA:
+                *ptr += current->mm->start_data;
+                break;
+        case OLD_FLAT_RELOC_TYPE_BSS:
+                *ptr += current->mm->end_data;
+                break;
+        default:
+                printk("BINFMT_FLAT: Unknown relocation type=%x\n", r.reloc.type);
+                break;
+        }
+
+#ifdef DEBUG
+        printk("Relocation became %x\n", (int)*ptr);
+#endif
+}               
+
+/****************************************************************************/
+
+static int load_flat_file(struct linux_binprm * bprm,
+                struct lib_info *libinfo, int id, unsigned long *extra_stack)
+{
+        struct flat_hdr * hdr;
+        unsigned long textpos = 0, datapos = 0, result;
+        unsigned long realdatastart = 0;
+        unsigned long text_len, data_len, bss_len, stack_len, flags;
+        unsigned long memp = 0; /* for finding the brk area */
+        unsigned long extra, rlim;
+        unsigned long *reloc = 0, *rp;
+        struct inode *inode;
+        int i, rev, relocs = 0;
+        loff_t fpos;
+        unsigned long start_code, end_code;
+
+        hdr = ((struct flat_hdr *) bprm->buf);          /* exec-header */
+        inode = bprm->file->f_dentry->d_inode;
+
+        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);
+
+        if (flags & FLAT_FLAG_KTRACE)
+                printk("BINFMT_FLAT: Loading file: %s\n", bprm->filename);
+
+        if (strncmp(hdr->magic, "bFLT", 4) ||
+                        (rev != FLAT_VERSION && rev != OLD_FLAT_VERSION)) {
+                /*
+                 * because a lot of people do not manage to produce good
+                 * flat binaries,  we leave this printk to help them realise
+                 * the problem.  We only print the error if its not a script file
+                 */
+                if (strncmp(hdr->magic, "#!", 2))
+                        printk("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) {
+                printk("BINFMT_FLAT: shared libraries are not available before rev 0x%x\n",
+                                (int) FLAT_VERSION);
+                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)) {
+                printk("Support for ZFLAT executables is not enabled.\n");
+                return -ENOEXEC;
+        }
+#endif
+
+        /*
+         * Check initial limits. This avoids letting people circumvent
+         * size limits imposed on them by creating programs with large
+         * arrays in the data or bss.
+         */
+        rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
+        if (rlim >= RLIM_INFINITY)
+                rlim = ~0;
+        if (data_len + bss_len > rlim)
+                return -ENOMEM;
+
+        /* Flush all traces of the currently running executable */
+        if (id == 0) {
+                result = flush_old_exec(bprm);
+                if (result)
+                        return result;
+
+                /* OK, This is the point of no return */
+                set_personality(PER_LINUX);
+        }
+
+        /*
+         * calculate the extra space we need to map in
+         */
+        extra = max(bss_len + stack_len, relocs * sizeof(unsigned long));
+
+        /*
+         * 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");
+
+                down_write(&current->mm->mmap_sem);
+                textpos = do_mmap(bprm->file, 0, text_len, PROT_READ|PROT_EXEC, 0, 0);
+                up_write(&current->mm->mmap_sem);
+                if (!textpos  || textpos >= (unsigned long) -4096) {
+                        if (!textpos)
+                                textpos = (unsigned long) -ENOMEM;
+                        printk("Unable to mmap process text, errno %d\n", (int)-textpos);
+                        return(textpos);
+                }
+
+                down_write(&current->mm->mmap_sem);
+                realdatastart = do_mmap(0, 0, data_len + extra +
+                                MAX_SHARED_LIBS * sizeof(unsigned long),
+                                PROT_READ|PROT_WRITE|PROT_EXEC, 0, 0);
+                up_write(&current->mm->mmap_sem);
+
+                if (realdatastart == 0 || realdatastart >= (unsigned long)-4096) {
+                        if (!realdatastart)
+                                realdatastart = (unsigned long) -ENOMEM;
+                        printk("Unable to allocate RAM for process data, errno %d\n",
+                                        (int)-datapos);
+                        do_munmap(current->mm, textpos, text_len);
+                        return realdatastart;
+                }
+                datapos = realdatastart + MAX_SHARED_LIBS * sizeof(unsigned long);
+
+                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(unsigned long)), 0);
+                } else
+#endif
+                {
+                        result = bprm->file->f_op->read(bprm->file, (char *) datapos,
+                                        data_len + (relocs * sizeof(unsigned long)), &fpos);
+                }
+                if (result >= (unsigned long)-4096) {
+                        printk("Unable to read data+bss, errno %d\n", (int)-result);
+                        do_munmap(current->mm, textpos, text_len);
+                        do_munmap(current->mm, realdatastart, data_len + extra);
+                        return result;
+                }
+
+                reloc = (unsigned long *) (datapos+(ntohl(hdr->reloc_start)-text_len));
+                memp = realdatastart;
+
+        } else {
+
+                down_write(&current->mm->mmap_sem);
+                textpos = do_mmap(0, 0, text_len + data_len + extra +
+                                        MAX_SHARED_LIBS * sizeof(unsigned long),
+                                PROT_READ | PROT_EXEC | PROT_WRITE, 0, 0);
+                up_write(&current->mm->mmap_sem);
+                if (!textpos  || textpos >= (unsigned long) -4096) {
+                        if (!textpos)
+                                textpos = (unsigned long) -ENOMEM;
+                        printk("Unable to allocate RAM for process text/data, errno %d\n",
+                                        (int)-textpos);
+                        return(textpos);
+                }
+
+                realdatastart = textpos + ntohl(hdr->data_start);
+                datapos = realdatastart + MAX_SHARED_LIBS * sizeof(unsigned long);
+                reloc = (unsigned long *) (textpos + ntohl(hdr->reloc_start) +
+                                MAX_SHARED_LIBS * sizeof(unsigned long));
+                memp = textpos;
+
+#ifdef CONFIG_BINFMT_ZFLAT
+                /*
+                 * 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
+                {
+                        fpos = 0;
+                        result = bprm->file->f_op->read(bprm->file,
+                                        (char *) textpos, text_len, &fpos);
+                        if (result < (unsigned long) -4096) {
+                                fpos = ntohl(hdr->data_start);
+                                result = bprm->file->f_op->read(bprm->file, (char *) datapos,
+                                        data_len + (relocs * sizeof(unsigned long)), &fpos);
+                        }
+                }
+                if (result >= (unsigned long)-4096) {
+                        printk("Unable to read code+data+bss, errno %d\n",(int)-result);
+                        do_munmap(current->mm, textpos, text_len + data_len + extra +
+                                MAX_SHARED_LIBS * sizeof(unsigned long));
+                        return result;
+                }
+        }
+
+        if (flags & FLAT_FLAG_KTRACE)
+                printk("Mapping is %x, Entry point is %x, data_start is %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;
+        if (id == 0) {
+                current->mm->start_code = start_code;
+                current->mm->end_code = end_code;
+                current->mm->start_data = datapos;
+                current->mm->end_data = datapos + data_len;
+                /*
+                 * set up the brk stuff, uses any slack left in data/bss/stack
+                 * allocation.  We put the brk after the bss (between the bss
+                 * and stack) like other platforms.
+                 */
+                current->mm->start_brk = datapos + data_len + bss_len;
+                current->mm->brk = (current->mm->start_brk + 3) & ~3;
+                current->mm->context.end_brk = memp + ksize((void *) memp) - stack_len;
+                set_mm_counter(current->mm, rss, 0);
+        }
+
+        if (flags & FLAT_FLAG_KTRACE)
+                printk("%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->lib_list[id].start_code = start_code;
+        libinfo->lib_list[id].start_data = datapos;
+        libinfo->lib_list[id].start_brk = datapos + data_len + bss_len;
+        libinfo->lib_list[id].text_len = text_len;
+        libinfo->lib_list[id].loaded = 1;
+        libinfo->lib_list[id].entry = (0x00ffffff & ntohl(hdr->entry)) + textpos;
+        libinfo->lib_list[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) {
+                for (rp = (unsigned long *)datapos; *rp != 0xffffffff; rp++) {
+                        unsigned long addr;
+                        if (*rp) {
+                                addr = calc_reloc(*rp, libinfo, id, 0);
+                                if (addr == RELOC_FAILED)
+                                        return -ENOEXEC;
+                                *rp = addr;
+                        }
+                }
+        }
+
+        /*
+         * 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) {
+                for (i=0; i < relocs; i++) {
+                        unsigned long addr, relval;
+
+                        /* Get the address of the pointer to be
+                           relocated (of course, the address has to be
+                           relocated first).  */
+                        relval = ntohl(reloc[i]);
+                        addr = flat_get_relocate_addr(relval);
+                        rp = (unsigned long *) calc_reloc(addr, libinfo, id, 1);
+                        if (rp == (unsigned long *)RELOC_FAILED)
+                                return -ENOEXEC;
+
+                        /* Get the pointer's value.  */
+                        addr = flat_get_addr_from_rp(rp, relval, flags);
+                        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.  */
+                                flat_put_addr_at_rp(rp, addr, relval);
+                        }
+                }
+        } else {
+                for (i=0; i < relocs; i++)
+                        old_reloc(ntohl(reloc[i]));
+        }
+        
+        flush_icache_range(start_code, end_code);
+
+        /* zero the BSS,  BRK and stack areas */
+        memset((void*)(datapos + data_len), 0, bss_len + 
+                        (memp + ksize((void *) memp) - stack_len -      /* end brk */
+                        libinfo->lib_list[id].start_brk) +              /* start brk */
+                        stack_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 */
+/****************************************************************************/
+
+/*
+ * These are the functions used to load flat style executables and shared
+ * libraries.  There is no binary dependent code anywhere else.
+ */
+
+static int load_flat_binary(struct linux_binprm * bprm, struct pt_regs * regs)
+{
+        struct lib_info libinfo;
+        unsigned long p = bprm->p;
+        unsigned long stack_len;
+        unsigned long start_addr;
+        unsigned long *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.
+         */
+#define TOP_OF_ARGS (PAGE_SIZE * MAX_ARG_PAGES - sizeof(void *))
+        stack_len = TOP_OF_ARGS - bprm->p;             /* the strings */
+        stack_len += (bprm->argc + 1) * sizeof(char *); /* the argv array */
+        stack_len += (bprm->envc + 1) * sizeof(char *); /* 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.lib_list[i].loaded)
+                        for (j=0; j<MAX_SHARED_LIBS; j++)
+                                (-(j+1))[(unsigned long *)(libinfo.lib_list[i].start_data)] =
+                                        (libinfo.lib_list[j].loaded)?
+                                                libinfo.lib_list[j].start_data:UNLOADED_LIB;
+
+        compute_creds(bprm);
+        current->flags &= ~PF_FORKNOEXEC;
+
+        set_binfmt(&flat_format);
+
+        p = ((current->mm->context.end_brk + stack_len + 3) & ~3) - 4;
+        DBG_FLT("p=%x\n", (int)p);
+
+        /* copy the arg pages onto the stack, this could be more efficient :-) */
+        for (i = TOP_OF_ARGS - 1; i >= bprm->p; i--)
+                * (char *) --p =
+                        ((char *) page_address(bprm->page[i/PAGE_SIZE]))[i % PAGE_SIZE];
+
+        sp = (unsigned long *) create_flat_tables(p, bprm);
+        
+        /* 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.lib_list[0].entry;
+
+#ifdef CONFIG_BINFMT_SHARED_FLAT
+        for (i = MAX_SHARED_LIBS-1; i>0; i--) {
+                if (libinfo.lib_list[i].loaded) {
+                        /* Push previos first to call address */
+                        --sp;   put_user(start_addr, sp);
+                        start_addr = libinfo.lib_list[i].entry;
+                }
+        }
+#endif
+        
+        /* Stash our initial stack pointer into the mm structure */
+        current->mm->start_stack = (unsigned long )sp;
+
+        
+        DBG_FLT("start_thread(regs=0x%x, entry=0x%x, start_stack=0x%x)\n",
+                (int)regs, (int)start_addr, (int)current->mm->start_stack);
+        
+        start_thread(regs, start_addr, current->mm->start_stack);
+
+        if (current->ptrace & PT_PTRACED)
+                send_sig(SIGTRAP, current, 0);
+
+        return 0;
+}
+
+/****************************************************************************/
+
+static int __init init_flat_binfmt(void)
+{
+        return register_binfmt(&flat_format);
+}
+
+static void __exit exit_flat_binfmt(void)
+{
+        unregister_binfmt(&flat_format);
+}
+
+/****************************************************************************/
+
+core_initcall(init_flat_binfmt);
+module_exit(exit_flat_binfmt);
+
+/****************************************************************************/