Import of Linux/MIPS 2.1.14.2

1 files changed, 1374 insertions, 0 deletions

diff --git a/arch/mips/kernel/irixelf.c b/arch/mips/kernel/irixelf.c
new file mode 100644
index 000000000..ec4f5c449
--- /dev/null
+++ b/arch/mips/kernel/irixelf.c
@@ -0,0 +1,1374 @@
+/* $Id: irixelf.c,v 1.8 1996/08/24 03:52:25 dm Exp $
+ * irixelf.c: Code to load IRIX ELF executables which conform to
+ *            the MIPS ABI.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ *
+ * Based upon work which is:
+ * Copyright 1993, 1994: Eric Youngdale (ericy@cais.com).
+ */
+
+#include <linux/module.h>
+
+#include <linux/fs.h>
+#include <linux/stat.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/binfmts.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/malloc.h>
+#include <linux/shm.h>
+#include <linux/personality.h>
+#include <linux/elfcore.h>
+
+#include <asm/segment.h>
+#include <asm/pgtable.h>
+
+#include <linux/config.h>
+
+#define DLINFO_ITEMS 12
+
+#include <linux/elf.h>
+
+#undef DEBUG_ELF
+
+static int load_irix_binary(struct linux_binprm * bprm, struct pt_regs * regs);
+static int load_irix_library(int fd);
+static int irix_core_dump(long signr, struct pt_regs * regs);
+extern int dump_fpu (elf_fpregset_t *);
+
+static struct linux_binfmt irix_format = {
+#ifndef MODULE
+	NULL, NULL, load_irix_binary, load_irix_library, irix_core_dump
+#else
+	NULL, &mod_use_count_, load_irix_binary, load_irix_library, irix_core_dump
+#endif
+};
+
+#ifdef DEBUG_ELF
+/* Debugging routines. */
+static char *get_elf_p_type(Elf32_Word p_type)
+{
+	int i = (int) p_type;
+
+	switch(i) {
+	case PT_NULL: return("PT_NULL"); break;
+	case PT_LOAD: return("PT_LOAD"); break;
+	case PT_DYNAMIC: return("PT_DYNAMIC"); break;
+	case PT_INTERP: return("PT_INTERP"); break;
+	case PT_NOTE: return("PT_NOTE"); break;
+	case PT_SHLIB: return("PT_SHLIB"); break;
+	case PT_PHDR: return("PT_PHDR"); break;
+	case PT_LOPROC: return("PT_LOPROC/REGINFO"); break;
+	case PT_HIPROC: return("PT_HIPROC"); break;
+	default: return("PT_BOGUS"); break;
+	}
+}
+
+static void print_elfhdr(struct elfhdr *ehp)
+{
+	int i;
+
+	printk("ELFHDR: e_ident<");
+	for(i = 0; i < (EI_NIDENT - 1); i++) printk("%x ", ehp->e_ident[i]);
+	printk("%x>\n", ehp->e_ident[i]);
+	printk("        e_type[%04x] e_machine[%04x] e_version[%08lx]\n",
+	       (unsigned short) ehp->e_type, (unsigned short) ehp->e_machine,
+	       (unsigned long) ehp->e_version);
+	printk("        e_entry[%08lx] e_phoff[%08lx] e_shoff[%08lx] "
+	       "e_flags[%08lx]\n",
+	       (unsigned long) ehp->e_entry, (unsigned long) ehp->e_phoff,
+	       (unsigned long) ehp->e_shoff, (unsigned long) ehp->e_flags);
+	printk("        e_ehsize[%04x] e_phentsize[%04x] e_phnum[%04x]\n",
+	       (unsigned short) ehp->e_ehsize, (unsigned short) ehp->e_phentsize,
+	       (unsigned short) ehp->e_phnum);
+	printk("        e_shentsize[%04x] e_shnum[%04x] e_shstrndx[%04x]\n",
+	       (unsigned short) ehp->e_shentsize, (unsigned short) ehp->e_shnum,
+	       (unsigned short) ehp->e_shstrndx);
+}
+
+static void print_phdr(int i, struct elf_phdr *ep)
+{
+	printk("PHDR[%d]: p_type[%s] p_offset[%08lx] p_vaddr[%08lx] "
+	       "p_paddr[%08lx]\n", i, get_elf_p_type(ep->p_type),
+	       (unsigned long) ep->p_offset, (unsigned long) ep->p_vaddr,
+	       (unsigned long) ep->p_paddr);
+	printk("         p_filesz[%08lx] p_memsz[%08lx] p_flags[%08lx] "
+	       "p_align[%08lx]\n", (unsigned long) ep->p_filesz,
+	       (unsigned long) ep->p_memsz, (unsigned long) ep->p_flags,
+	       (unsigned long) ep->p_align);
+}
+
+static void dump_phdrs(struct elf_phdr *ep, int pnum)
+{
+	int i;
+
+	for(i = 0; i < pnum; i++, ep++) {
+		if((ep->p_type == PT_LOAD) ||
+		   (ep->p_type == PT_INTERP) ||
+		   (ep->p_type == PT_PHDR))
+			print_phdr(i, ep);
+	}
+}
+#endif /* (DEBUG_ELF) */
+
+static void set_brk(unsigned long start, unsigned long end)
+{
+	start = PAGE_ALIGN(start);
+	end = PAGE_ALIGN(end);
+	if (end <= start) 
+		return;
+	do_mmap(NULL, start, end - start,
+		PROT_READ | PROT_WRITE | PROT_EXEC,
+		MAP_FIXED | MAP_PRIVATE, 0);
+}
+
+
+/* We need to explicitly zero any fractional pages
+ * after the data section (i.e. bss).  This would
+ * contain the junk from the file that should not
+ * be in memory.
+ */
+static void padzero(unsigned long elf_bss)
+{
+	unsigned long nbyte;
+	char * fpnt;
+  
+	nbyte = elf_bss & (PAGE_SIZE-1);
+	if (nbyte) {
+		nbyte = PAGE_SIZE - nbyte;
+		/* FIXME: someone should investigate, why a bad binary
+		 * is allowed to bring a wrong elf_bss until here,
+		 * and how to react. Suffice the plain return?
+		 * rossius@hrz.tu-chemnitz.de
+		 */
+		if (verify_area(VERIFY_WRITE, (void *) elf_bss, nbyte))
+			return;
+
+		fpnt = (char *) elf_bss;
+		do {
+			put_user(0, fpnt++);
+		} while (--nbyte);
+	}
+}
+
+unsigned long * create_irix_tables(char * p, int argc, int envc,
+				   struct elfhdr * exec, unsigned int load_addr,
+				   unsigned int interp_load_addr,
+				   struct pt_regs *regs, struct elf_phdr *ephdr)
+{
+	unsigned long *argv,*envp, *dlinfo;
+	unsigned long * sp;
+	unsigned long * csp;
+
+#ifdef DEBUG_ELF
+	printk("create_irix_tables: p[%p] argc[%d] envc[%d] "
+	       "load_addr[%08x] interp_load_addr[%08x]\n",
+	       p, argc, envc, load_addr, interp_load_addr);
+#endif
+	sp = (unsigned long *) (0xfffffffc & (unsigned long) p);
+
+	/* Make sure we will be aligned properly at the end of this. */
+	csp = sp;
+	csp -= exec ? DLINFO_ITEMS*2 : 2;
+	csp -= envc + 1;
+	csp -= argc+1;
+	if (!(((unsigned long) csp) & 4))
+	    sp--;
+
+	sp -= exec ? DLINFO_ITEMS*2 : 2;
+	dlinfo = sp;
+	sp -= envc+1;
+	envp = sp;
+	sp -= argc+1;
+	argv = sp;
+
+	put_user((unsigned long)argc, --sp);
+
+#define NEW_AUX_ENT(id, val) \
+	  put_user ((id), dlinfo++); \
+	  put_user ((val), dlinfo++)
+
+#define INTERP_ALIGN  (~((64 * 1024) - 1))
+
+	if(exec) {
+		struct elf_phdr * eppnt;
+		eppnt = (struct elf_phdr *) exec->e_phoff;
+
+		/* Put this here for an ELF program interpreter */
+		NEW_AUX_ENT (AT_PHDR, ephdr->p_vaddr);
+		NEW_AUX_ENT (AT_PHENT, sizeof (struct elf_phdr));
+		NEW_AUX_ENT (AT_PHNUM, exec->e_phnum);
+		NEW_AUX_ENT (AT_PAGESZ, PAGE_SIZE);
+		NEW_AUX_ENT (AT_BASE, (interp_load_addr & (INTERP_ALIGN)));
+		NEW_AUX_ENT (AT_FLAGS, 0);
+		NEW_AUX_ENT (AT_ENTRY, (unsigned long) exec->e_entry);
+		NEW_AUX_ENT (AT_UID, (unsigned long) current->uid);
+		NEW_AUX_ENT (AT_EUID, (unsigned long) current->euid);
+		NEW_AUX_ENT (AT_GID, (unsigned long) current->gid);
+		NEW_AUX_ENT (AT_EGID, (unsigned long) current->egid);
+	}
+	NEW_AUX_ENT (AT_NULL, 0);
+#undef NEW_AUX_ENT
+
+	current->mm->arg_start = (unsigned long) p;
+	while (argc-->0) {
+		put_user(p,argv++);
+		while (get_user(p++)) /* nothing */ ;
+	}
+	put_user(0,argv);
+	current->mm->arg_end = current->mm->env_start = (unsigned long) p;
+	while (envc-->0) {
+		put_user(p,envp++);
+		while (get_user(p++)) /* nothing */ ;
+	}
+	put_user(0,envp);
+	current->mm->env_end = (unsigned long) p;
+	return sp;
+}
+
+
+/* This is much more generalized than the library routine read function,
+ * so we keep this separate.  Technically the library read function
+ * is only provided so that we can read a.out libraries that have
+ * an ELF header.
+ */
+static unsigned int load_irix_interp(struct elfhdr * interp_elf_ex,
+				     struct inode * interpreter_inode,
+				     unsigned int *interp_load_addr)
+{
+	struct file * file;
+	struct elf_phdr *elf_phdata  =  NULL;
+	struct elf_phdr *eppnt;
+	unsigned int len;
+	unsigned int load_addr;
+	int elf_exec_fileno;
+	int elf_bss;
+	int retval;
+	unsigned int last_bss;
+	int error;
+	int i;
+	unsigned int k;
+	
+	elf_bss = 0;
+	last_bss = 0;
+	error = load_addr = 0;
+	
+#ifdef DEBUG_ELF
+	print_elfhdr(interp_elf_ex);
+#endif
+
+	/* First of all, some simple consistency checks */
+	if((interp_elf_ex->e_type != ET_EXEC && 
+	    interp_elf_ex->e_type != ET_DYN) || 
+	    INCOMPATIBLE_MACHINE(interp_elf_ex->e_machine) ||
+	   (!interpreter_inode->i_op ||
+	    !interpreter_inode->i_op->default_file_ops->mmap)){
+		printk("IRIX interp has bad e_type %d\n", interp_elf_ex->e_type);
+		return 0xffffffff;
+	}
+	
+	/* Now read in all of the header information */
+	if(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > PAGE_SIZE) {
+	    printk("IRIX interp header bigger than a page (%d)\n",
+		   (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum));
+	    return 0xffffffff;
+	}
+	
+	elf_phdata =  (struct elf_phdr *) 
+		kmalloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum,
+			GFP_KERNEL);
+
+	if(!elf_phdata) {
+          printk("Cannot kmalloc phdata for IRIX interp.\n");
+	  return 0xffffffff;
+	}
+	
+	/* If the size of this structure has changed, then punt, since
+	 * we will be doing the wrong thing.
+	 */
+	if(interp_elf_ex->e_phentsize != 32) {
+		printk("IRIX interp e_phentsize == %d != 32 ",
+		       interp_elf_ex->e_phentsize);
+		kfree(elf_phdata);
+		return 0xffffffff;
+	}
+
+	retval = read_exec(interpreter_inode, interp_elf_ex->e_phoff,
+			   (char *) elf_phdata,
+			   sizeof(struct elf_phdr) * interp_elf_ex->e_phnum, 1);
+	
+#ifdef DEBUG_ELF
+	dump_phdrs(elf_phdata, interp_elf_ex->e_phnum);
+#endif
+
+	elf_exec_fileno = open_inode(interpreter_inode, O_RDONLY);
+	if (elf_exec_fileno < 0) {
+		printk("Could not open IRIX interp inode.\n");
+		kfree(elf_phdata);
+		return 0xffffffff;
+	}
+
+	file = current->files->fd[elf_exec_fileno];
+
+	eppnt = elf_phdata;
+	for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) {
+	  if(eppnt->p_type == PT_LOAD) {
+	    int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
+	    int elf_prot = 0;
+	    unsigned long vaddr = 0;
+	    if (eppnt->p_flags & PF_R) elf_prot =  PROT_READ;
+	    if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
+	    if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
+	    elf_type |= MAP_FIXED;
+	    vaddr = eppnt->p_vaddr;
+	    
+#ifdef DEBUG_ELF
+	    printk("INTERP do_mmap(%p, %08lx, %08lx, %08lx, %08lx, %08lx) ",
+		   file, vaddr,
+		   (unsigned long) (eppnt->p_filesz + (eppnt->p_vaddr & 0xfff)),
+		   (unsigned long) elf_prot, (unsigned long) elf_type,
+		   (unsigned long) (eppnt->p_offset & 0xfffff000));
+#endif
+	    error = do_mmap(file, vaddr,
+			    eppnt->p_filesz + (eppnt->p_vaddr & 0xfff),
+			    elf_prot, elf_type,
+			    eppnt->p_offset & 0xfffff000);
+	    
+	    if(error < 0 && error > -1024) {
+		    printk("Aieee IRIX interp mmap error=%d\n", error);
+		    break;  /* Real error */
+	    }
+#ifdef DEBUG_ELF
+	    printk("error=%08lx ", (unsigned long) error);
+#endif
+	    if(!load_addr && interp_elf_ex->e_type == ET_DYN) {
+	      load_addr = error;
+#ifdef DEBUG_ELF
+              printk("load_addr = error ");
+#endif
+	    }
+
+	    /* Find the end of the file  mapping for this phdr, and keep
+	     * track of the largest address we see for this.
+	     */
+	    k = eppnt->p_vaddr + eppnt->p_filesz;
+	    if(k > elf_bss) elf_bss = k;
+
+	    /* Do the same thing for the memory mapping - between
+	     * elf_bss and last_bss is the bss section.
+	     */
+	    k = eppnt->p_memsz + eppnt->p_vaddr;
+	    if(k > last_bss) last_bss = k;
+#ifdef DEBUG_ELF
+	    printk("\n");
+#endif
+	  }
+	}
+
+	/* Now use mmap to map the library into memory. */
+	sys_close(elf_exec_fileno);
+	if(error < 0 && error > -1024) {
+#ifdef DEBUG_ELF
+		printk("got error %d\n", error);
+#endif
+		kfree(elf_phdata);
+		return 0xffffffff;
+	}
+
+	/* Now fill out the bss section.  First pad the last page up
+	 * to the page boundary, and then perform a mmap to make sure
+	 * that there are zeromapped pages up to and including the last
+	 * bss page.
+	 */
+#ifdef DEBUG_ELF
+	printk("padzero(%08lx) ", (unsigned long) (elf_bss));
+#endif
+	padzero(elf_bss);
+	len = (elf_bss + 0xfff) & 0xfffff000; /* What we have mapped so far */
+
+#ifdef DEBUG_ELF
+	printk("last_bss[%08lx] len[%08lx]\n", (unsigned long) last_bss,
+	       (unsigned long) len);
+#endif
+
+	/* Map the last of the bss segment */
+	if (last_bss > len) {
+		do_mmap(NULL, len, (last_bss - len),
+			PROT_READ|PROT_WRITE|PROT_EXEC,
+			MAP_FIXED|MAP_PRIVATE, 0);
+	}
+	kfree(elf_phdata);
+
+	*interp_load_addr = load_addr;
+	return ((unsigned int) interp_elf_ex->e_entry);
+}
+
+/* Check sanity of IRIX elf executable header. */
+static int verify_binary(struct elfhdr *ehp, struct linux_binprm *bprm)
+{
+	if (ehp->e_ident[0] != 0x7f || strncmp(&ehp->e_ident[1], "ELF", 3)) {
+		return  -ENOEXEC;
+	}
+	
+	/* First of all, some simple consistency checks */
+	if((ehp->e_type != ET_EXEC && ehp->e_type != ET_DYN) || 
+	    INCOMPATIBLE_MACHINE(ehp->e_machine) ||
+	   (!bprm->inode->i_op || !bprm->inode->i_op->default_file_ops ||
+	    !bprm->inode->i_op->default_file_ops->mmap)) {
+		return -ENOEXEC;
+	}
+	
+	/* Only support MIPS ARCH2 or greater IRIX binaries for now. */
+	if(!(ehp->e_flags & EF_MIPS_ARCH) && !(ehp->e_flags & 0x04)) {
+		return -ENOEXEC;
+	}
+
+	/* XXX Don't support N32 or 64bit binaries yet because they can
+	 * XXX and do execute 64 bit instructions and expect all registers
+	 * XXX to be 64 bit as well.  We need to make the kernel save
+	 * XXX all registers as 64bits on cpu's capable of this at
+	 * XXX exception time plus frob the XTLB exception vector.
+	 */
+	if((ehp->e_flags & 0x20)) {
+		return -ENOEXEC;
+	}
+
+	return 0; /* It's ok. */
+}
+
+#define IRIX_INTERP_PREFIX "/usr/gnemul/irix"
+
+/* Look for an IRIX ELF interpreter. */
+static inline int look_for_irix_interpreter(char **name,
+					    struct inode **interpreter_inode,
+					    struct elfhdr *interp_elf_ex,
+					    struct elf_phdr *epp,
+					    struct linux_binprm *bprm, int pnum)
+{
+	int i, old_fs;
+	int retval = -EINVAL;
+
+	*name = NULL;
+	for(i = 0; i < pnum; i++, epp++) {
+		if(epp->p_type != PT_INTERP)
+			continue;
+
+		/* It is illegal to have two interpreters for one executable. */
+		if(*name != NULL)
+			goto losing;
+
+		*name = (char *) kmalloc((epp->p_filesz +
+					  strlen(IRIX_INTERP_PREFIX)),
+					 GFP_KERNEL);
+		if(!*name)
+			return -ENOMEM;
+
+		strcpy(*name, IRIX_INTERP_PREFIX);
+		retval = read_exec(bprm->inode, epp->p_offset, (*name + 16),
+				   epp->p_filesz, 1);
+		if(retval < 0)
+			goto losing;
+
+		old_fs = get_fs(); set_fs(get_ds());
+		retval = namei(*name, interpreter_inode);
+		set_fs(old_fs);
+		if(retval < 0)
+			goto losing;
+
+		retval = read_exec(*interpreter_inode, 0, bprm->buf, 128, 1);
+		if(retval < 0)
+			goto losing;
+
+		*interp_elf_ex = *((struct elfhdr *) bprm->buf);
+	}
+	return 0;
+
+losing:
+	kfree(*name);
+	return retval;
+}
+
+static inline int verify_irix_interpreter(struct elfhdr *ihp)
+{
+	if(ihp->e_ident[0] != 0x7f || strncmp(&ihp->e_ident[1], "ELF", 3))
+		return -ELIBBAD;
+	return 0;
+}
+
+#define EXEC_MAP_FLAGS (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE)
+
+static inline void map_executable(struct file *fp, struct elf_phdr *epp, int pnum,
+				  unsigned int *estack, unsigned int *laddr,
+				  unsigned int *scode, unsigned int *ebss,
+				  unsigned int *ecode, unsigned int *edata,
+				  unsigned int *ebrk)
+{
+	unsigned int tmp;
+	int i, prot;
+
+	for(i = 0; i < pnum; i++, epp++) {
+		if(epp->p_type != PT_LOAD)
+			continue;
+
+		/* Map it. */
+		prot  = (epp->p_flags & PF_R) ? PROT_READ : 0;
+		prot |= (epp->p_flags & PF_W) ? PROT_WRITE : 0;
+		prot |= (epp->p_flags & PF_X) ? PROT_EXEC : 0;
+		(void) do_mmap(fp, (epp->p_vaddr & 0xfffff000),
+			       (epp->p_filesz + (epp->p_vaddr & 0xfff)),
+			       prot, EXEC_MAP_FLAGS,
+			       (epp->p_offset & 0xfffff000));
+
+		/* Fixup location tracking vars. */
+		if((epp->p_vaddr & 0xfffff000) < *estack)
+			*estack = (epp->p_vaddr & 0xfffff000);
+		if(!*laddr)
+			*laddr = epp->p_vaddr - epp->p_offset;
+		if(epp->p_vaddr < *scode)
+			*scode = epp->p_vaddr;
+
+		tmp = epp->p_vaddr + epp->p_filesz;
+		if(tmp > *ebss)
+			*ebss = tmp;
+		if((epp->p_flags & PF_X) && *ecode < tmp)
+			*ecode = tmp;
+		if(*edata < tmp)
+			*edata = tmp;
+
+		tmp = epp->p_vaddr + epp->p_memsz;
+		if(tmp > *ebrk)
+			*ebrk = tmp;
+	}
+
+}
+
+static inline int map_interpreter(struct elf_phdr *epp, struct elfhdr *ihp,
+				  struct inode *iino, unsigned int *iladdr,
+				  int pnum, int old_fs,
+				  unsigned int *eentry)
+{
+	int i;
+
+	*eentry = 0xffffffff;
+	for(i = 0; i < pnum; i++, epp++) {
+		if(epp->p_type != PT_INTERP)
+			continue;
+
+		/* We should have fielded this error elsewhere... */
+		if(*eentry != 0xffffffff)
+			return -1;
+
+		set_fs(old_fs);
+		*eentry = load_irix_interp(ihp, iino, iladdr);
+		old_fs = get_fs();
+		set_fs(get_ds());
+
+		iput(iino);
+
+		if(*eentry == 0xffffffff)
+			return -1;
+	}
+	return 0;
+}
+
+/* These are the functions used to load ELF style executables and shared
+ * libraries.  There is no binary dependent code anywhere else.
+ */
+static inline int do_load_irix_binary(struct linux_binprm * bprm,
+				      struct pt_regs * regs)
+{
+	struct elfhdr elf_ex, interp_elf_ex;
+	struct inode *interpreter_inode;
+	struct elf_phdr *elf_phdata, *elf_ihdr, *elf_ephdr;
+	unsigned int load_addr, elf_bss, elf_brk;
+	unsigned int elf_entry, interp_load_addr = 0;
+	unsigned int start_code, end_code, end_data, elf_stack;
+	int old_fs, elf_exec_fileno, retval, has_interp, has_ephdr, i;
+	char *elf_interpreter;
+	
+	load_addr = 0;
+	has_interp = has_ephdr = 0;
+	elf_ihdr = elf_ephdr = 0;
+	elf_ex = *((struct elfhdr *) bprm->buf);
+	
+	if(verify_binary(&elf_ex, bprm))
+		return -ENOEXEC;
+
+#ifdef DEBUG_ELF
+	print_elfhdr(&elf_ex);
+#endif
+
+	/* Now read in all of the header information */
+	elf_phdata = (struct elf_phdr *) kmalloc(elf_ex.e_phentsize * 
+						 elf_ex.e_phnum, GFP_KERNEL);
+	if (elf_phdata == NULL)
+		return -ENOMEM;
+	
+	retval = read_exec(bprm->inode, elf_ex.e_phoff, (char *) elf_phdata,
+			   elf_ex.e_phentsize * elf_ex.e_phnum, 1);
+	if (retval < 0) {
+		kfree (elf_phdata);
+		return retval;
+	}
+	
+#ifdef DEBUG_ELF
+	dump_phdrs(elf_phdata, elf_ex.e_phnum);
+#endif
+
+	/* Set some things for later. */
+	for(i = 0; i < elf_ex.e_phnum; i++) {
+		switch(elf_phdata[i].p_type) {
+		case PT_INTERP:
+			has_interp = 1;
+			elf_ihdr = &elf_phdata[i];
+			break;
+		case PT_PHDR:
+			has_ephdr = 1;
+			elf_ephdr = &elf_phdata[i];
+			break;
+		};
+	}
+#ifdef DEBUG_ELF
+	printk("\n");
+#endif
+
+	elf_bss = 0;
+	elf_brk = 0;
+	elf_exec_fileno = open_inode(bprm->inode, O_RDONLY);
+
+	if (elf_exec_fileno < 0) {
+		kfree (elf_phdata);
+		return elf_exec_fileno;
+	}
+	
+	elf_stack = 0xffffffff;
+	elf_interpreter = NULL;
+	start_code = 0xffffffff;
+	end_code = 0;
+	end_data = 0;
+	
+	retval = look_for_irix_interpreter(&elf_interpreter, &interpreter_inode,
+					   &interp_elf_ex, elf_phdata, bprm,
+					   elf_ex.e_phnum);
+	if(retval) {
+		kfree(elf_phdata);
+		sys_close(elf_exec_fileno);
+		return retval;
+	}
+	
+	if(elf_interpreter) {
+		retval = verify_irix_interpreter(&interp_elf_ex);
+		if(retval) {
+			kfree(elf_interpreter);
+			kfree(elf_phdata);
+			sys_close(elf_exec_fileno);
+			return retval;
+		}
+	}
+	
+	/* OK, we are done with that, now set up the arg stuff,
+	 * and then start this sucker up.
+	 */
+	if (!bprm->sh_bang) {
+		if (!bprm->p) {
+			if(elf_interpreter) {
+			      kfree(elf_interpreter);
+			}
+			kfree (elf_phdata);
+			sys_close(elf_exec_fileno);
+			return -E2BIG;
+		}
+	}
+	
+	/* OK, This is the point of no return. */
+	flush_old_exec(bprm);
+
+	current->mm->end_data = 0;
+	current->mm->end_code = 0;
+	current->mm->start_mmap = ELF_START_MMAP;
+	current->mm->mmap = NULL;
+	elf_entry = (unsigned int) elf_ex.e_entry;
+	
+	/* Do this so that we can load the interpreter, if need be.  We will
+	 * change some of these later.
+	 */
+	current->mm->rss = 0;
+	bprm->p = setup_arg_pages(bprm->p, bprm);
+	current->mm->start_stack = bprm->p;
+	
+	/* At this point, we assume that the image should be loaded at
+	 * fixed address, not at a variable address.
+	 */
+	old_fs = get_fs();
+	set_fs(get_ds());
+	
+	map_executable(current->files->fd[elf_exec_fileno], elf_phdata,
+		       elf_ex.e_phnum, &elf_stack, &load_addr,
+		       &start_code, &elf_bss, &end_code, &end_data, &elf_brk);
+
+	if(elf_interpreter) {
+		retval = map_interpreter(elf_phdata, &interp_elf_ex,
+					 interpreter_inode, &interp_load_addr,
+					 elf_ex.e_phnum, old_fs, &elf_entry);
+		kfree(elf_interpreter);
+		if(retval) {
+			set_fs(old_fs);
+			printk("Unable to load IRIX ELF interpreter\n");
+			kfree(elf_phdata);
+			send_sig(SIGSEGV, current, 0);
+			return 0;
+		}
+	}
+
+	set_fs(old_fs);
+	
+	kfree(elf_phdata);
+	sys_close(elf_exec_fileno);
+	current->personality = PER_IRIX32;
+
+	if (current->exec_domain && current->exec_domain->use_count)
+		(*current->exec_domain->use_count)--;
+	if (current->binfmt && current->binfmt->use_count)
+		(*current->binfmt->use_count)--;
+	current->exec_domain = lookup_exec_domain(current->personality);
+	current->binfmt = &irix_format;
+	if (current->exec_domain && current->exec_domain->use_count)
+		(*current->exec_domain->use_count)++;
+	if (current->binfmt && current->binfmt->use_count)
+		(*current->binfmt->use_count)++;
+
+	current->suid = current->euid = current->fsuid = bprm->e_uid;
+	current->sgid = current->egid = current->fsgid = bprm->e_gid;
+	current->flags &= ~PF_FORKNOEXEC;
+	bprm->p = (unsigned long) 
+	  create_irix_tables((char *)bprm->p, bprm->argc, bprm->envc,
+			(elf_interpreter ? &elf_ex : NULL),
+			load_addr, interp_load_addr, regs, elf_ephdr);
+	current->mm->start_brk = current->mm->brk = elf_brk;
+	current->mm->end_code = end_code;
+	current->mm->start_code = start_code;
+	current->mm->end_data = end_data;
+	current->mm->start_stack = bprm->p;
+
+	/* Calling set_brk effectively mmaps the pages that we need for the
+	 * bss and break sections.
+	 */
+	set_brk(elf_bss, elf_brk);
+
+	padzero(elf_bss);
+
+#ifdef DEBUG_ELF
+	printk("(start_brk) %08lx\n" , current->mm->start_brk);
+	printk("(end_code) %08lx\n" , current->mm->end_code);
+	printk("(start_code) %08lx\n" , current->mm->start_code);
+	printk("(end_data) %08lx\n" , current->mm->end_data);
+	printk("(start_stack) %08lx\n" , current->mm->start_stack);
+	printk("(brk) %08lx\n" , current->mm->brk);
+#endif
+
+#if 0 /* XXX No fucking way dude... */
+	/* Why this, you ask???  Well SVr4 maps page 0 as read-only,
+	 * and some applications "depend" upon this behavior.
+	 * Since we do not have the power to recompile these, we
+	 * emulate the SVr4 behavior.  Sigh.
+	 */
+	(void) do_mmap(NULL, 0, 4096, PROT_READ | PROT_EXEC,
+		       MAP_FIXED | MAP_PRIVATE, 0);
+#endif
+
+	start_thread(regs, elf_entry, bprm->p);
+	if (current->flags & PF_PTRACED)
+		send_sig(SIGTRAP, current, 0);
+	return 0;
+}
+
+static int load_irix_binary(struct linux_binprm * bprm, struct pt_regs * regs)
+{
+	int retval;
+
+	MOD_INC_USE_COUNT;
+	retval = do_load_irix_binary(bprm, regs);
+	MOD_DEC_USE_COUNT;
+	return retval;
+}
+
+/* This is really simpleminded and specialized - we are loading an
+ * a.out library that is given an ELF header.
+ */
+static inline int do_load_irix_library(int fd)
+{
+	struct file * file;
+	struct elfhdr elf_ex;
+	struct elf_phdr *elf_phdata  =  NULL;
+	struct  inode * inode;
+	unsigned int len;
+	int elf_bss;
+	int retval;
+	unsigned int bss;
+	int error;
+	int i,j, k;
+
+	len = 0;
+	file = current->files->fd[fd];
+	inode = file->f_inode;
+	elf_bss = 0;
+	
+	if (!file || !file->f_op)
+		return -EACCES;
+
+	/* Seek to the beginning of the file. */
+	if (file->f_op->lseek) {
+		if ((error = file->f_op->lseek(inode, file, 0, 0)) != 0)
+			return -ENOEXEC;
+	} else
+		file->f_pos = 0;
+
+	set_fs(KERNEL_DS);
+	error = file->f_op->read(inode, file, (char *) &elf_ex, sizeof(elf_ex));
+	set_fs(USER_DS);
+	if (error != sizeof(elf_ex))
+		return -ENOEXEC;
+
+	if (elf_ex.e_ident[0] != 0x7f ||
+	    strncmp(&elf_ex.e_ident[1], "ELF",3) != 0)
+		return -ENOEXEC;
+
+	/* First of all, some simple consistency checks. */
+	if(elf_ex.e_type != ET_EXEC || elf_ex.e_phnum > 2 ||
+	   INCOMPATIBLE_MACHINE(elf_ex.e_machine) ||
+	   (!inode->i_op || !inode->i_op->default_file_ops->mmap))
+		return -ENOEXEC;
+	
+	/* Now read in all of the header information. */
+	if(sizeof(struct elf_phdr) * elf_ex.e_phnum > PAGE_SIZE)
+		return -ENOEXEC;
+	
+	elf_phdata =  (struct elf_phdr *) 
+		kmalloc(sizeof(struct elf_phdr) * elf_ex.e_phnum, GFP_KERNEL);
+	if (elf_phdata == NULL)
+		return -ENOMEM;
+	
+	retval = read_exec(inode, elf_ex.e_phoff, (char *) elf_phdata,
+			   sizeof(struct elf_phdr) * elf_ex.e_phnum, 1);
+	
+	j = 0;
+	for(i=0; i<elf_ex.e_phnum; i++)
+		if((elf_phdata + i)->p_type == PT_LOAD) j++;
+	
+	if(j != 1)  {
+		kfree(elf_phdata);
+		return -ENOEXEC;
+	}
+	
+	while(elf_phdata->p_type != PT_LOAD) elf_phdata++;
+	
+	/* Now use mmap to map the library into memory. */
+	error = do_mmap(file,
+			elf_phdata->p_vaddr & 0xfffff000,
+			elf_phdata->p_filesz + (elf_phdata->p_vaddr & 0xfff),
+			PROT_READ | PROT_WRITE | PROT_EXEC,
+			MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
+			elf_phdata->p_offset & 0xfffff000);
+
+	k = elf_phdata->p_vaddr + elf_phdata->p_filesz;
+	if(k > elf_bss) elf_bss = k;
+	
+	if (error != (elf_phdata->p_vaddr & 0xfffff000)) {
+		kfree(elf_phdata);
+		return error;
+	}
+
+	padzero(elf_bss);
+
+	len = (elf_phdata->p_filesz + elf_phdata->p_vaddr+ 0xfff) & 0xfffff000;
+	bss = elf_phdata->p_memsz + elf_phdata->p_vaddr;
+	if (bss > len)
+	  do_mmap(NULL, len, bss-len,
+		  PROT_READ|PROT_WRITE|PROT_EXEC,
+		  MAP_FIXED|MAP_PRIVATE, 0);
+	kfree(elf_phdata);
+	return 0;
+}
+
+static int load_irix_library(int fd)
+{
+	int retval;
+
+	MOD_INC_USE_COUNT;
+	retval = do_load_irix_library(fd);
+	MOD_DEC_USE_COUNT;
+	return retval;
+}
+	
+/* Called through irix_syssgi() to map an elf image given an FD,
+ * a phdr ptr USER_PHDRP in userspace, and a count CNT telling how many
+ * phdrs there are in the USER_PHDRP array.  We return the vaddr the
+ * first phdr was successfully mapped to.
+ */
+unsigned long irix_mapelf(int fd, struct elf_phdr *user_phdrp, int cnt)
+{
+	struct elf_phdr *hp;
+	struct file *filp;
+	int i, retval;
+
+#ifdef DEBUG_ELF
+	printk("irix_mapelf: fd[%d] user_phdrp[%p] cnt[%d]\n",
+	       fd, user_phdrp, cnt);
+#endif
+
+	/* First get the verification out of the way. */
+	hp = user_phdrp;
+	retval = verify_area(VERIFY_READ, hp, (sizeof(struct elf_phdr) * cnt));
+	if(retval) {
+#ifdef DEBUG_ELF
+		printk("irix_mapelf: verify_area fails!\n");
+#endif
+		return retval;
+	}
+
+#ifdef DEBUG_ELF
+	dump_phdrs(user_phdrp, cnt);
+#endif
+
+	for(i = 0; i < cnt; i++, hp++)
+		if(hp->p_type != PT_LOAD) {
+			printk("irix_mapelf: One section is not PT_LOAD!\n");
+			return -ENOEXEC;
+		}
+
+	filp = current->files->fd[fd];
+	if(!filp || !filp->f_op) {
+		printk("irix_mapelf: Bogon filp!\n");
+		return -EACCES;
+	}
+
+	hp = user_phdrp;
+	for(i = 0; i < cnt; i++, hp++) {
+		int prot;
+
+		prot  = (hp->p_flags & PF_R) ? PROT_READ : 0;
+		prot |= (hp->p_flags & PF_W) ? PROT_WRITE : 0;
+		prot |= (hp->p_flags & PF_X) ? PROT_EXEC : 0;
+		retval = do_mmap(filp, (hp->p_vaddr & 0xfffff000),
+				 (hp->p_filesz + (hp->p_vaddr & 0xfff)),
+				 prot, (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE),
+				 (hp->p_offset & 0xfffff000));
+
+		if(retval != (hp->p_vaddr & 0xfffff000)) {
+			printk("irix_mapelf: do_mmap fails with %d!\n", retval);
+			return retval;
+		}
+	}
+
+#ifdef DEBUG_ELF
+	printk("irix_mapelf: Success, returning %08lx\n", user_phdrp->p_vaddr);
+#endif
+	return user_phdrp->p_vaddr;
+}
+
+/*
+ * ELF core dumper
+ *
+ * Modelled on fs/exec.c:aout_core_dump()
+ * Jeremy Fitzhardinge <jeremy@sw.oz.au>
+ */
+
+/* These are the only things you should do on a core-file: use only these
+ * functions to write out all the necessary info.
+ */
+static int dump_write(struct file *file, const void *addr, int nr)
+{
+	return file->f_op->write(file->f_inode, file, addr, nr) == nr;
+}
+
+static int dump_seek(struct file *file, off_t off)
+{
+	if (file->f_op->lseek) {
+		if (file->f_op->lseek(file->f_inode, file, off, 0) != off)
+			return 0;
+	} else
+		file->f_pos = off;
+	return 1;
+}
+
+/* Decide whether a segment is worth dumping; default is yes to be
+ * sure (missing info is worse than too much; etc).
+ * Personally I'd include everything, and use the coredump limit...
+ *
+ * I think we should skip something. But I am not sure how. H.J.
+ */
+static inline int maydump(struct vm_area_struct *vma)
+{
+	if (!(vma->vm_flags & (VM_READ|VM_WRITE|VM_EXEC)))
+		return 0;
+#if 1
+	if (vma->vm_flags & (VM_WRITE|VM_GROWSUP|VM_GROWSDOWN))
+		return 1;
+	if (vma->vm_flags & (VM_READ|VM_EXEC|VM_EXECUTABLE|VM_SHARED))
+		return 0;
+#endif
+	return 1;
+}
+
+#define roundup(x, y)  ((((x)+((y)-1))/(y))*(y))
+
+/* An ELF note in memory. */
+struct memelfnote
+{
+	const char *name;
+	int type;
+	unsigned int datasz;
+	void *data;
+};
+
+static int notesize(struct memelfnote *en)
+{
+	int sz;
+	
+	sz = sizeof(struct elf_note);
+	sz += roundup(strlen(en->name), 4);
+	sz += roundup(en->datasz, 4);
+	
+	return sz;
+}
+
+/* #define DEBUG */
+
+#define DUMP_WRITE(addr, nr)	\
+	do { if (!dump_write(file, (addr), (nr))) return 0; } while(0)
+#define DUMP_SEEK(off)	\
+	do { if (!dump_seek(file, (off))) return 0; } while(0)
+
+static int writenote(struct memelfnote *men, struct file *file)
+{
+	struct elf_note en;
+
+	en.n_namesz = strlen(men->name);
+	en.n_descsz = men->datasz;
+	en.n_type = men->type;
+
+	DUMP_WRITE(&en, sizeof(en));
+	DUMP_WRITE(men->name, en.n_namesz);
+	/* XXX - cast from long long to long to avoid need for libgcc.a */
+	DUMP_SEEK(roundup((unsigned long)file->f_pos, 4));	/* XXX */
+	DUMP_WRITE(men->data, men->datasz);
+	DUMP_SEEK(roundup((unsigned long)file->f_pos, 4));	/* XXX */
+	
+	return 1;
+}
+#undef DUMP_WRITE
+#undef DUMP_SEEK
+
+#define DUMP_WRITE(addr, nr)	\
+	if (!dump_write(&file, (addr), (nr))) \
+		goto close_coredump;
+#define DUMP_SEEK(off)	\
+	if (!dump_seek(&file, (off))) \
+		goto close_coredump;
+/* Actual dumper.
+ *
+ * This is a two-pass process; first we find the offsets of the bits,
+ * and then they are actually written out.  If we run out of core limit
+ * we just truncate.
+ */
+static int irix_core_dump(long signr, struct pt_regs * regs)
+{
+	int has_dumped = 0;
+	struct file file;
+	struct inode *inode;
+	unsigned short fs;
+	char corefile[6+sizeof(current->comm)];
+	int segs;
+	int i;
+	size_t size;
+	struct vm_area_struct *vma;
+	struct elfhdr elf;
+	off_t offset = 0, dataoff;
+	int limit = current->rlim[RLIMIT_CORE].rlim_cur;
+	int numnote = 4;
+	struct memelfnote notes[4];
+	struct elf_prstatus prstatus;	/* NT_PRSTATUS */
+	elf_fpregset_t fpu;		/* NT_PRFPREG */
+	struct elf_prpsinfo psinfo;	/* NT_PRPSINFO */
+	
+	if (!current->dumpable || limit < PAGE_SIZE)
+		return 0;
+	current->dumpable = 0;
+
+#ifndef CONFIG_BINFMT_IRIX
+	MOD_INC_USE_COUNT;
+#endif
+
+	/* Count what's needed to dump, up to the limit of coredump size. */
+	segs = 0;
+	size = 0;
+	for(vma = current->mm->mmap; vma != NULL; vma = vma->vm_next) {
+		if (maydump(vma))
+		{
+			int sz = vma->vm_end-vma->vm_start;
+		
+			if (size+sz >= limit)
+				break;
+			else
+				size += sz;
+		}
+		
+		segs++;
+	}
+#ifdef DEBUG
+	printk("irix_core_dump: %d segs taking %d bytes\n", segs, size);
+#endif
+
+	/* Set up header. */
+	memcpy(elf.e_ident, ELFMAG, SELFMAG);
+	elf.e_ident[EI_CLASS] = ELFCLASS32;
+	elf.e_ident[EI_DATA] = ELFDATA2LSB;
+	elf.e_ident[EI_VERSION] = EV_CURRENT;
+	memset(elf.e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);
+	
+	elf.e_type = ET_CORE;
+	elf.e_machine = ELF_EM_CPU;
+	elf.e_version = EV_CURRENT;
+	elf.e_entry = 0;
+	elf.e_phoff = sizeof(elf);
+	elf.e_shoff = 0;
+	elf.e_flags = 0;
+	elf.e_ehsize = sizeof(elf);
+	elf.e_phentsize = sizeof(struct elf_phdr);
+	elf.e_phnum = segs+1;		/* Include notes. */
+	elf.e_shentsize = 0;
+	elf.e_shnum = 0;
+	elf.e_shstrndx = 0;
+	
+	fs = get_fs();
+	set_fs(KERNEL_DS);
+	memcpy(corefile,"core.",5);
+#if 0
+	memcpy(corefile+5,current->comm,sizeof(current->comm));
+#else
+	corefile[4] = '\0';
+#endif
+	if (open_namei(corefile,O_CREAT | 2 | O_TRUNC,0600,&inode,NULL)) {
+		inode = NULL;
+		goto end_coredump;
+	}
+	if (!S_ISREG(inode->i_mode))
+		goto end_coredump;
+	if (!inode->i_op || !inode->i_op->default_file_ops)
+		goto end_coredump;
+	file.f_mode = 3;
+	file.f_flags = 0;
+	file.f_count = 1;
+	file.f_inode = inode;
+	file.f_pos = 0;
+	file.f_reada = 0;
+	file.f_op = inode->i_op->default_file_ops;
+	if (file.f_op->open)
+		if (file.f_op->open(inode,&file))
+			goto end_coredump;
+	if (!file.f_op->write)
+		goto close_coredump;
+	has_dumped = 1;
+	current->flags |= PF_DUMPCORE;
+
+	DUMP_WRITE(&elf, sizeof(elf));
+	offset += sizeof(elf);				/* Elf header. */
+	offset += (segs+1) * sizeof(struct elf_phdr);	/* Program headers. */
+
+	/* Set up the notes in similar form to SVR4 core dumps made
+	 * with info from their /proc.
+	 */
+	memset(&psinfo, 0, sizeof(psinfo));
+	memset(&prstatus, 0, sizeof(prstatus));
+
+	notes[0].name = "CORE";
+	notes[0].type = NT_PRSTATUS;
+	notes[0].datasz = sizeof(prstatus);
+	notes[0].data = &prstatus;
+	prstatus.pr_info.si_signo = prstatus.pr_cursig = signr;
+	copy_sigbits32(&prstatus.pr_sigpend, current->signal);
+	copy_sigbits32(&prstatus.pr_sighold, current->blocked);
+	psinfo.pr_pid = prstatus.pr_pid = current->pid;
+	psinfo.pr_ppid = prstatus.pr_ppid = current->p_pptr->pid;
+	psinfo.pr_pgrp = prstatus.pr_pgrp = current->pgrp;
+	psinfo.pr_sid = prstatus.pr_sid = current->session;
+	prstatus.pr_utime.tv_sec = CT_TO_SECS(current->utime);
+	prstatus.pr_utime.tv_usec = CT_TO_USECS(current->utime);
+	prstatus.pr_stime.tv_sec = CT_TO_SECS(current->stime);
+	prstatus.pr_stime.tv_usec = CT_TO_USECS(current->stime);
+	prstatus.pr_cutime.tv_sec = CT_TO_SECS(current->cutime);
+	prstatus.pr_cutime.tv_usec = CT_TO_USECS(current->cutime);
+	prstatus.pr_cstime.tv_sec = CT_TO_SECS(current->cstime);
+	prstatus.pr_cstime.tv_usec = CT_TO_USECS(current->cstime);
+	if (sizeof(elf_gregset_t) != sizeof(struct pt_regs)) {
+		printk("sizeof(elf_gregset_t) (%d) != sizeof(struct pt_regs) "
+		       "(%d)\n", sizeof(elf_gregset_t), sizeof(struct pt_regs));
+	} else {
+		*(struct pt_regs *)&prstatus.pr_reg = *regs;
+	}
+	
+	notes[1].name = "CORE";
+	notes[1].type = NT_PRPSINFO;
+	notes[1].datasz = sizeof(psinfo);
+	notes[1].data = &psinfo;
+	psinfo.pr_state = current->state;
+	psinfo.pr_sname =
+		((current->state < 0 || current->state > 5) ?
+		('.') : ("RSDZTD"[current->state]));
+	psinfo.pr_zomb = psinfo.pr_sname == 'Z';
+	psinfo.pr_nice = current->priority-15;
+	psinfo.pr_flag = current->flags;
+	psinfo.pr_uid = current->uid;
+	psinfo.pr_gid = current->gid;
+	{
+		int i, len;
+
+		set_fs(fs);
+		
+		len = current->mm->arg_end - current->mm->arg_start;
+		len = len >= ELF_PRARGSZ ? ELF_PRARGSZ : len;
+		memcpy_fromfs(&psinfo.pr_psargs,
+			      (const char *)current->mm->arg_start, len);
+		for(i = 0; i < len; i++)
+			if (psinfo.pr_psargs[i] == 0)
+				psinfo.pr_psargs[i] = ' ';
+		psinfo.pr_psargs[len] = 0;
+
+		set_fs(KERNEL_DS);
+	}
+	strncpy(psinfo.pr_fname, current->comm, sizeof(psinfo.pr_fname));
+
+	notes[2].name = "CORE";
+	notes[2].type = NT_TASKSTRUCT;
+	notes[2].datasz = sizeof(*current);
+	notes[2].data = current;
+	
+	/* Try to dump the fpu. */
+	prstatus.pr_fpvalid = dump_fpu (&fpu);
+	if (!prstatus.pr_fpvalid) {
+		numnote--;
+	} else {
+		notes[3].name = "CORE";
+		notes[3].type = NT_PRFPREG;
+		notes[3].datasz = sizeof(fpu);
+		notes[3].data = &fpu;
+	}
+	
+	/* Write notes phdr entry. */
+	{
+		struct elf_phdr phdr;
+		int sz = 0;
+
+		for(i = 0; i < numnote; i++)
+			sz += notesize(&notes[i]);
+		
+		phdr.p_type = PT_NOTE;
+		phdr.p_offset = offset;
+		phdr.p_vaddr = 0;
+		phdr.p_paddr = 0;
+		phdr.p_filesz = sz;
+		phdr.p_memsz = 0;
+		phdr.p_flags = 0;
+		phdr.p_align = 0;
+
+		offset += phdr.p_filesz;
+		DUMP_WRITE(&phdr, sizeof(phdr));
+	}
+
+	/* Page-align dumped data. */
+	dataoff = offset = roundup(offset, PAGE_SIZE);
+	
+	/* Write program headers for segments dump. */
+	for(vma = current->mm->mmap, i = 0;
+		i < segs && vma != NULL; vma = vma->vm_next) {
+		struct elf_phdr phdr;
+		size_t sz;
+
+		i++;
+
+		sz = vma->vm_end - vma->vm_start;
+		
+		phdr.p_type = PT_LOAD;
+		phdr.p_offset = offset;
+		phdr.p_vaddr = vma->vm_start;
+		phdr.p_paddr = 0;
+		phdr.p_filesz = maydump(vma) ? sz : 0;
+		phdr.p_memsz = sz;
+		offset += phdr.p_filesz;
+		phdr.p_flags = vma->vm_flags & VM_READ ? PF_R : 0;
+		if (vma->vm_flags & VM_WRITE) phdr.p_flags |= PF_W;
+		if (vma->vm_flags & VM_EXEC) phdr.p_flags |= PF_X;
+		phdr.p_align = PAGE_SIZE;
+
+		DUMP_WRITE(&phdr, sizeof(phdr));
+	}
+
+	for(i = 0; i < numnote; i++)
+		if (!writenote(&notes[i], &file))
+			goto close_coredump;
+	
+	set_fs(fs);
+
+	DUMP_SEEK(dataoff);
+	
+	for(i = 0, vma = current->mm->mmap;
+	    i < segs && vma != NULL;
+	    vma = vma->vm_next) {
+		unsigned long addr = vma->vm_start;
+		unsigned long len = vma->vm_end - vma->vm_start;
+		
+		if (!maydump(vma))
+			continue;
+		i++;
+#ifdef DEBUG
+		printk("elf_core_dump: writing %08lx %lx\n", addr, len);
+#endif
+		DUMP_WRITE((void *)addr, len);
+	}
+
+	if ((off_t) file.f_pos != offset) {
+		/* Sanity check. */
+		printk("elf_core_dump: file.f_pos (%ld) != offset (%ld)\n",
+		       (off_t) file.f_pos, offset);
+	}
+
+ close_coredump:
+	if (file.f_op->release)
+		file.f_op->release(inode,&file);
+
+ end_coredump:
+	set_fs(fs);
+	iput(inode);
+#ifndef CONFIG_BINFMT_ELF
+	MOD_DEC_USE_COUNT;
+#endif
+	return has_dumped;
+}
+
+int init_irix_binfmt(void) {
+	return register_binfmt(&irix_format);
+}
+
+#ifdef MODULE
+
+int init_module(void) {
+	/* Install the COFF, ELF and XOUT loaders.
+	 * N.B. We *rely* on the table being the right size with the
+	 * right number of free slots...
+	 */
+	return init_irix_binfmt();
+}
+
+
+void cleanup_module( void) {
+	/* Remove the IRIX ELF loaders. */
+	unregister_binfmt(&irix_format);
+}
+#endif