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 0000000..f0cd67d
--- /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);
+
+/****************************************************************************/