After some effort, I have taught depmod to handle endianness,

allowing us to build a cross-depmod that runs on the host and
generates the target modules.dep and modules.*map files
 -Erik

package/modutils/modutils-cross.patch

@@ -0,0 +1,453 @@
+diff -urN modutils-2.4.27.0.orig/depmod/depmod.c modutils-2.4.27.0/depmod/depmod.c
+--- modutils-2.4.27.0.orig/depmod/depmod.c	2005-09-29 18:14:05.000000000 -0600
++++ modutils-2.4.27.0/depmod/depmod.c	2005-09-29 18:12:36.000000000 -0600
+@@ -274,7 +274,6 @@
+ 
+ extern int quick;	/* Option -A */
+ 
+-
+ /*
+  *	Create a symbol definition.
+  *	Add defined symbol to the head of the list of defined symbols.
+@@ -556,6 +555,13 @@
+ 		if (!in_range(f, m_size, ref_pci, sizeof(pci_device_size)))
+ 			return;
+ 		memcpy(&pci_device_size, (char *)image + ref_pci - f->baseaddr, sizeof(pci_device_size));
++		if (byteswap==1) {
++		    if (sizeof(unsigned tgt_long) == 4) {
++			pci_device_size = bswap_32(pci_device_size);
++		    } else if (sizeof(unsigned tgt_long) == 8) {
++			pci_device_size = bswap_64(pci_device_size);
++		    }
++		}
+ 	}
+ 	else
+ 		pci_device_size = sizeof(pci_device);
+@@ -573,6 +579,14 @@
+ 		memset(&pci_device, 0, sizeof(pci_device));
+ 		memcpy(&pci_device, (char *)image + ref_pci - f->baseaddr, pci_device_size);
+ 		ref_pci += pci_device_size;
++		if (byteswap==1) {
++		    pci_device.vendor = bswap_32(pci_device.vendor);
++		    pci_device.device = bswap_32(pci_device.device);
++		    pci_device.subvendor = bswap_32(pci_device.subvendor);
++		    pci_device.subdevice = bswap_32(pci_device.subdevice);
++		    pci_device.class = bswap_32(pci_device.class);
++		    pci_device.class_mask = bswap_32(pci_device.class_mask);
++		}
+ 		if (!pci_device.vendor)
+ 			break;
+ 		mod->pci_device = xrealloc(mod->pci_device, ++(mod->n_pci_device)*sizeof(*(mod->pci_device)));
+@@ -594,6 +608,13 @@
+ 	if (!in_range(f, m_size, ref_isapnp, sizeof(isapnp_device_size)))
+ 		return;
+ 	memcpy(&isapnp_device_size, (char *)image + ref_isapnp - f->baseaddr, sizeof(isapnp_device_size));
++	if (byteswap==1) {
++	    if (sizeof(unsigned tgt_long) == 4) {
++		isapnp_device_size = bswap_32(isapnp_device_size);
++	    } else if (sizeof(unsigned tgt_long) == 8) {
++		isapnp_device_size = bswap_64(isapnp_device_size);
++	    }
++	}
+ 	ref_ref_isapnp = obj_symbol_final_value(f, obj_find_symbol(f, "__module_isapnp_device_table"));
+ 	if (!in_range(f, m_size, ref_ref_isapnp, sizeof(ref_isapnp)))
+ 		return;
+@@ -608,6 +629,12 @@
+ 		memset(&isapnp_device, 0, sizeof(isapnp_device));
+ 		memcpy(&isapnp_device, (char *)image + ref_isapnp - f->baseaddr, isapnp_device_size);
+ 		ref_isapnp += isapnp_device_size;
++		if (byteswap==1) {
++		    isapnp_device.card_vendor = bswap_16(isapnp_device.card_vendor);
++		    isapnp_device.card_device = bswap_16(isapnp_device.card_device);
++		    isapnp_device.vendor = bswap_16(isapnp_device.vendor);
++		    isapnp_device.function = bswap_16(isapnp_device.function);
++		}
+ 		if (!isapnp_device.card_vendor)
+ 			break;
+ 		mod->isapnp_device = xrealloc(mod->isapnp_device, ++(mod->n_isapnp_device)*sizeof(*(mod->isapnp_device)));
+@@ -629,6 +656,13 @@
+ 	if (!in_range(f, m_size, ref_isapnp, sizeof(isapnp_card_size)))
+ 		return;
+ 	memcpy(&isapnp_card_size, (char *)image + ref_isapnp - f->baseaddr, sizeof(isapnp_card_size));
++	if (byteswap==1) {
++	    if (sizeof(unsigned tgt_long) == 4) {
++		isapnp_card_size = bswap_32(isapnp_card_size);
++	    } else if (sizeof(unsigned tgt_long) == 8) {
++		isapnp_card_size = bswap_64(isapnp_card_size);
++	    }
++	}
+ 	ref_ref_isapnp = obj_symbol_final_value(f, obj_find_symbol(f, "__module_isapnp_card_table"));
+ 	if (!in_range(f, m_size, ref_ref_isapnp, sizeof(ref_isapnp)))
+ 		return;
+@@ -642,6 +676,11 @@
+ 		memset(&isapnp_card, 0, sizeof(isapnp_card));
+ 		memcpy(&isapnp_card, (char *)image + ref_isapnp - f->baseaddr, isapnp_card_size);
+ 		ref_isapnp += isapnp_card_size;
++		if (byteswap==1) {
++		    isapnp_card.card_vendor = bswap_16(isapnp_card.card_vendor);
++		    isapnp_card.card_device = bswap_16(isapnp_card.card_device);
++		    // Fixme -- iterate over all devs fixing up vendor and function
++		}
+ 		if (!isapnp_card.card_vendor)
+ 			break;
+ 		mod->isapnp_card = xrealloc(mod->isapnp_card, ++(mod->n_isapnp_card)*sizeof(*(mod->isapnp_card)));
+@@ -659,11 +698,25 @@
+ 	struct usb_device_id usb_device, *latest;
+ 	ElfW(Addr) ref_usb, ref_ref_usb;
+ 	unsigned tgt_long usb_device_size;
+-	ref_usb = obj_symbol_final_value(f, obj_find_symbol(f, "__module_usb_device_size"));
++	struct obj_symbol *sym;
++	sym = obj_find_symbol(f, "__module_usb_device_size");
++	if (!sym)
++		return;
++	ref_usb = obj_symbol_final_value(f, sym);
+ 	if (!in_range(f, m_size, ref_usb, sizeof(usb_device_size)))
+ 		return;
+ 	memcpy(&usb_device_size, (char *)image + ref_usb - f->baseaddr, sizeof(usb_device_size));
+-	ref_ref_usb = obj_symbol_final_value(f, obj_find_symbol(f, "__module_usb_device_table"));
++	if (byteswap==1) {
++	    if (sizeof(unsigned tgt_long) == 4) {
++		usb_device_size = bswap_32(usb_device_size);
++	    } else if (sizeof(unsigned tgt_long) == 8) {
++		usb_device_size = bswap_64(usb_device_size);
++	    }
++	}
++	sym = obj_find_symbol(f, "__module_usb_device_table");
++	if (!sym)
++		return;
++	ref_ref_usb = obj_symbol_final_value(f, sym);
+ 	if (!in_range(f, m_size, ref_ref_usb, sizeof(ref_usb)))
+ 		return;
+ 	memcpy(&ref_usb, (char *)image + ref_ref_usb - f->baseaddr, sizeof(ref_usb));
+@@ -677,6 +730,13 @@
+ 		memset(&usb_device, 0, sizeof(usb_device));
+ 		memcpy(&usb_device, (char *)image + ref_usb - f->baseaddr, usb_device_size);
+ 		ref_usb += usb_device_size;
++		if (byteswap==1) {
++		    usb_device.match_flags = bswap_16(usb_device.match_flags);
++		    usb_device.idVendor = bswap_16(usb_device.idVendor);
++		    usb_device.idProduct = bswap_16(usb_device.idProduct);
++		    usb_device.bcdDevice_lo = bswap_16(usb_device.bcdDevice_lo);
++		    usb_device.bcdDevice_hi = bswap_16(usb_device.bcdDevice_hi);
++		}
+ 		if (!usb_device.idVendor && !usb_device.bDeviceClass &&
+ 		    !usb_device.bInterfaceClass && !usb_device.driver_info)
+ 		break;
+@@ -699,6 +759,13 @@
+ 	if (!in_range(f, m_size, ref_parport, sizeof(parport_device_size)))
+ 		return;
+ 	memcpy(&parport_device_size, (char *)image + ref_parport - f->baseaddr, sizeof(parport_device_size));
++	if (byteswap==1) {
++	    if (sizeof(unsigned tgt_long) == 4) {
++		parport_device_size = bswap_32(parport_device_size);
++	    } else if (sizeof(unsigned tgt_long) == 8) {
++		parport_device_size = bswap_64(parport_device_size);
++	    }
++	}
+ 	ref_ref_parport = obj_symbol_final_value(f, obj_find_symbol(f, "__module_parport_device_table"));
+ 	if (!in_range(f, m_size, ref_ref_parport, sizeof(ref_parport)))
+ 		return;
+@@ -713,6 +780,14 @@
+ 		memset(&parport_device, 0, sizeof(parport_device));
+ 		memcpy(&parport_device, (char *)image + ref_parport - f->baseaddr, parport_device_size);
+ 		ref_parport += parport_device_size;
++		if (byteswap==1) {
++#if ELFCLASSM == ELFCLASS32
++		    parport_device.pattern = bswap_32(parport_device.pattern);
++#endif
++#if ELFCLASSM == ELFCLASS64
++		    parport_device.pattern = bswap_64(parport_device.pattern);
++#endif
++		}
+ 		if (!parport_device.pattern)
+ 			break;
+ 		mod->parport_device = xrealloc(mod->parport_device, ++(mod->n_parport_device)*sizeof(*(mod->parport_device)));
+@@ -737,6 +812,13 @@
+ 	if (!in_range(f, m_size, ref_pnpbios, sizeof(pnpbios_device_size)))
+ 		return;
+ 	memcpy(&pnpbios_device_size, (char *)image + ref_pnpbios - f->baseaddr, sizeof(pnpbios_device_size));
++	if (byteswap==1) {
++	    if (sizeof(unsigned tgt_long) == 4) {
++		pnpbios_device_size = bswap_32(pnpbios_device_size);
++	    } else if (sizeof(unsigned tgt_long) == 8) {
++		pnpbios_device_size = bswap_64(pnpbios_device_size);
++	    }
++	}
+ 	ref_ref_pnpbios = obj_symbol_final_value(f, obj_find_symbol(f, "__module_pnpbios_device_table"));
+ 	if (!in_range(f, m_size, ref_ref_pnpbios, sizeof(ref_pnpbios)))
+ 		return;
+@@ -751,6 +833,9 @@
+ 		memset(&pnpbios_device, 0, sizeof(pnpbios_device));
+ 		memcpy(&pnpbios_device, (char *)image + ref_pnpbios - f->baseaddr, pnpbios_device_size);
+ 		ref_pnpbios += pnpbios_device_size;
++		//if (byteswap==1) {
++		    // looks like there is nothing to do here...
++		//}
+ 		if (!pnpbios_device.id[0])
+ 			break;
+ 		mod->pnpbios_device = xrealloc(mod->pnpbios_device, ++(mod->n_pnpbios_device)*sizeof(*(mod->pnpbios_device)));
+@@ -772,6 +857,13 @@
+ 	if (!in_range(f, m_size, ref_ieee1394, sizeof(ieee1394_device_size)))
+ 		return;
+ 	memcpy(&ieee1394_device_size, (char *)image + ref_ieee1394 - f->baseaddr, sizeof(ieee1394_device_size));
++	if (byteswap==1) {
++	    if (sizeof(unsigned tgt_long) == 4) {
++		ieee1394_device_size = bswap_32(ieee1394_device_size);
++	    } else if (sizeof(unsigned tgt_long) == 8) {
++		ieee1394_device_size = bswap_64(ieee1394_device_size);
++	    }
++	}
+ 	ref_ref_ieee1394 = obj_symbol_final_value(f, obj_find_symbol(f, "__module_ieee1394_device_table"));
+ 	if (!in_range(f, m_size, ref_ref_ieee1394, sizeof(ref_ieee1394)))
+ 		return;
+@@ -786,6 +878,13 @@
+ 		memset(&ieee1394_device, 0, sizeof(ieee1394_device));
+ 		memcpy(&ieee1394_device, (char *)image + ref_ieee1394 - f->baseaddr, ieee1394_device_size);
+ 		ref_ieee1394 += ieee1394_device_size;
++		if (byteswap==1) {
++		    ieee1394_device.match_flags = bswap_32(ieee1394_device.match_flags);
++		    ieee1394_device.vendor_id = bswap_32(ieee1394_device.vendor_id);
++		    ieee1394_device.model_id = bswap_32(ieee1394_device.model_id);
++		    ieee1394_device.specifier_id = bswap_32(ieee1394_device.specifier_id);
++		    ieee1394_device.version = bswap_32(ieee1394_device.version);
++		}
+ 		if (ieee1394_device.match_flags == 0)
+ 			break;
+ 		mod->ieee1394_device = xrealloc(mod->ieee1394_device, ++(mod->n_ieee1394_device)*sizeof(*(mod->ieee1394_device)));
+diff -urN modutils-2.4.27.0.orig/include/obj.h modutils-2.4.27.0/include/obj.h
+--- modutils-2.4.27.0.orig/include/obj.h	2003-10-26 19:34:46.000000000 -0700
++++ modutils-2.4.27.0/include/obj.h	2005-09-29 17:53:53.000000000 -0600
+@@ -28,6 +28,8 @@
+ 
+ #include <stdio.h>
+ #include <sys/types.h>
++#include <endian.h>
++#include <byteswap.h>
+ #include <elf.h>
+ #include ELF_MACHINE_H
+ #include "module.h"
+@@ -299,4 +301,6 @@
+ 
+ int obj_gpl_license(struct obj_file *, const char **);
+ 
++extern int byteswap;
++
+ #endif /* obj.h */
+diff -urN modutils-2.4.27.0.orig/obj/obj_common.c modutils-2.4.27.0/obj/obj_common.c
+--- modutils-2.4.27.0.orig/obj/obj_common.c	2002-02-28 17:39:06.000000000 -0700
++++ modutils-2.4.27.0/obj/obj_common.c	2005-09-29 17:53:44.000000000 -0600
+@@ -28,6 +28,8 @@
+ #include <util.h>
+ #include <module.h>
+ 
++int byteswap;
++
+ /*======================================================================*/
+ 
+ /* Standard ELF hash function.  */
+diff -urN modutils-2.4.27.0.orig/obj/obj_load.c modutils-2.4.27.0/obj/obj_load.c
+--- modutils-2.4.27.0.orig/obj/obj_load.c	2003-10-26 19:59:12.000000000 -0700
++++ modutils-2.4.27.0/obj/obj_load.c	2005-09-29 17:00:23.000000000 -0600
+@@ -62,6 +62,54 @@
+       error("%s is not an ELF file", filename);
+       return NULL;
+     }
++
++  /* Check if the target endianness matches the host's endianness */
++  byteswap = 0;
++#if __BYTE_ORDER == __LITTLE_ENDIAN
++  if (f->header.e_ident[5] == ELFDATA2MSB) {
++      /* Ick -- we will have to byte-swap everything */
++      byteswap = 1;
++  }
++#elif __BYTE_ORDER == __BIG_ENDIAN
++  if (f->header.e_ident[5] == ELFDATA2LSB) {
++      byteswap = 1;
++  }
++#else
++#error Unknown host byte order!
++#endif
++  if (byteswap==1) {
++#if ELFCLASSM == ELFCLASS32
++	  f->header.e_type=bswap_16(f->header.e_type);
++	  f->header.e_machine=bswap_16(f->header.e_machine);
++	  f->header.e_version=bswap_32(f->header.e_version);
++	  f->header.e_entry=bswap_32(f->header.e_entry);
++	  f->header.e_phoff=bswap_32(f->header.e_phoff);
++	  f->header.e_shoff=bswap_32(f->header.e_shoff);
++	  f->header.e_flags=bswap_32(f->header.e_flags);
++	  f->header.e_ehsize=bswap_16(f->header.e_ehsize);
++	  f->header.e_phentsize=bswap_16(f->header.e_phentsize);
++	  f->header.e_phnum=bswap_16(f->header.e_phnum);
++	  f->header.e_shentsize=bswap_16(f->header.e_shentsize);
++	  f->header.e_shnum=bswap_16(f->header.e_shnum);
++	  f->header.e_shstrndx=bswap_16(f->header.e_shstrndx);
++#endif
++#if ELFCLASSM == ELFCLASS64
++	  f->header.e_type=bswap_32(f->header.e_type);
++	  f->header.e_machine=bswap_32(f->header.e_machine);
++	  f->header.e_version=bswap_64(f->header.e_version);
++	  f->header.e_entry=bswap_64(f->header.e_entry);
++	  f->header.e_phoff=bswap_64(f->header.e_phoff);
++	  f->header.e_shoff=bswap_64(f->header.e_shoff);
++	  f->header.e_flags=bswap_64(f->header.e_flags);
++	  f->header.e_ehsize=bswap_32(f->header.e_ehsize);
++	  f->header.e_phentsize=bswap_32(f->header.e_phentsize);
++	  f->header.e_phnum=bswap_32(f->header.e_phnum);
++	  f->header.e_shentsize=bswap_32(f->header.e_shentsize);
++	  f->header.e_shnum=bswap_32(f->header.e_shnum);
++	  f->header.e_shstrndx=bswap_32(f->header.e_shstrndx);
++#endif
++  }
++
+   if (f->header.e_ident[EI_CLASS] != ELFCLASSM
+       || f->header.e_ident[EI_DATA] != ELFDATAM
+       || f->header.e_ident[EI_VERSION] != EV_CURRENT
+@@ -116,6 +164,33 @@
+     {
+       struct obj_section *sec;
+ 
++      if (byteswap==1) {
++#if ELFCLASSM == ELFCLASS32
++	  section_headers[i].sh_name=bswap_32(section_headers[i].sh_name);
++	  section_headers[i].sh_type=bswap_32(section_headers[i].sh_type);
++	  section_headers[i].sh_flags=bswap_32(section_headers[i].sh_flags);
++	  section_headers[i].sh_addr=bswap_32(section_headers[i].sh_addr);
++	  section_headers[i].sh_offset=bswap_32(section_headers[i].sh_offset);
++	  section_headers[i].sh_size=bswap_32(section_headers[i].sh_size);
++	  section_headers[i].sh_link=bswap_32(section_headers[i].sh_link);
++	  section_headers[i].sh_info=bswap_32(section_headers[i].sh_info);
++	  section_headers[i].sh_addralign=bswap_32(section_headers[i].sh_addralign);
++	  section_headers[i].sh_entsize=bswap_32(section_headers[i].sh_entsize);
++#endif
++#if ELFCLASSM == ELFCLASS64
++	  section_headers[i].sh_name=bswap_64(section_headers[i].sh_name);
++	  section_headers[i].sh_type=bswap_64(section_headers[i].sh_type);
++	  section_headers[i].sh_flags=bswap_64(section_headers[i].sh_flags);
++	  section_headers[i].sh_addr=bswap_64(section_headers[i].sh_addr);
++	  section_headers[i].sh_offset=bswap_64(section_headers[i].sh_offset);
++	  section_headers[i].sh_size=bswap_64(section_headers[i].sh_size);
++	  section_headers[i].sh_link=bswap_64(section_headers[i].sh_link);
++	  section_headers[i].sh_info=bswap_64(section_headers[i].sh_info);
++	  section_headers[i].sh_addralign=bswap_64(section_headers[i].sh_addralign);
++	  section_headers[i].sh_entsize=bswap_64(section_headers[i].sh_entsize);
++#endif
++      }
++
+       f->sections[i] = sec = arch_new_section();
+       memset(sec, 0, sizeof(*sec));
+ 
+@@ -223,6 +298,20 @@
+ 	    nsym = sec->header.sh_size / sizeof(ElfW(Sym));
+ 	    strtab = f->sections[sec->header.sh_link]->contents;
+ 	    sym = (ElfW(Sym) *) sec->contents;
++	    if (byteswap==1) {
++#if ELFCLASSM == ELFCLASS32
++		sym->st_name = bswap_32(sym->st_name);
++		sym->st_value = bswap_32(sym->st_value);
++		sym->st_size = bswap_32(sym->st_size);
++		sym->st_shndx = bswap_16(sym->st_shndx);
++#endif
++#if ELFCLASSM == ELFCLASS64
++		sym->st_name = bswap_64(sym->st_name);
++		sym->st_value = bswap_64(sym->st_value);
++		sym->st_size = bswap_64(sym->st_size);
++		sym->st_shndx = bswap_16(sym->st_shndx);
++#endif
++	    }
+ 
+ 	    /* Allocate space for a table of local symbols.  */
+ 	    j = f->local_symtab_size = sec->header.sh_info;
+@@ -233,6 +322,22 @@
+ 	    for (j = 1, ++sym; j < nsym; ++j, ++sym)
+ 	      {
+ 		const char *name;
++
++		if (byteswap==1) {
++#if ELFCLASSM == ELFCLASS32
++		    sym->st_name = bswap_32(sym->st_name);
++		    sym->st_value = bswap_32(sym->st_value);
++		    sym->st_size = bswap_32(sym->st_size);
++		    sym->st_shndx = bswap_16(sym->st_shndx);
++#endif
++#if ELFCLASSM == ELFCLASS64
++		    sym->st_name = bswap_64(sym->st_name);
++		    sym->st_value = bswap_64(sym->st_value);
++		    sym->st_size = bswap_64(sym->st_size);
++		    sym->st_shndx = bswap_16(sym->st_shndx);
++#endif
++		}
++
+ 		if (sym->st_name)
+ 		  name = strtab+sym->st_name;
+ 		else
+@@ -298,9 +403,26 @@
+ 	      {
+ 		struct obj_symbol *intsym;
+ 		unsigned long symndx;
++		if (byteswap==1) {
++#if ELFCLASSM == ELFCLASS32
++		    rel->r_offset = bswap_32(rel->r_offset);
++		    rel->r_info = bswap_32(rel->r_info);
++#if Elf32_RelM != Elf32_Rel
++		    rel->r_addend = bswap_32(rel->r_addend);
++#endif
++#endif
++#if ELFCLASSM == ELFCLASS64
++		    rel->r_offset = bswap_64(rel->r_offset);
++		    rel->r_info = bswap_64(rel->r_info);
++#if Elf32_RelM != Elf32_Rel
++		    rel->r_addend = bswap_64(rel->r_addend);
++#endif
++#endif
++		}
+ 		symndx = ELFW(R_SYM)(rel->r_info);
+ 		if (symndx)
+ 		  {
++		    ElfW(Sym) *sym;
+ 		    if (symndx >= nsyms)
+ 		      {
+ 			error("%s: Bad symbol index: %08lx >= %08lx",
+@@ -308,7 +430,22 @@
+ 			continue;
+ 		      }
+ 
+-		    obj_find_relsym(intsym, f, f, rel, (ElfW(Sym) *)(symtab->contents), strtab);
++		    sym = (ElfW(Sym) *)(symtab->contents);
++		    if (byteswap==1) {
++#if ELFCLASSM == ELFCLASS32
++			sym->st_name = bswap_32(sym->st_name);
++			sym->st_value = bswap_32(sym->st_value);
++			sym->st_size = bswap_32(sym->st_size);
++			sym->st_shndx = bswap_16(sym->st_shndx);
++#endif
++#if ELFCLASSM == ELFCLASS64
++			sym->st_name = bswap_64(sym->st_name);
++			sym->st_value = bswap_64(sym->st_value);
++			sym->st_size = bswap_64(sym->st_size);
++			sym->st_shndx = bswap_16(sym->st_shndx);
++#endif
++		    }
++		    obj_find_relsym(intsym, f, f, rel, sym, strtab);
+ 		    intsym->r_type = ELFW(R_TYPE)(rel->r_info);
+ 		  }
+ 	      }
+diff -urN modutils-2.4.27.0.orig/util/modstat.c modutils-2.4.27.0/util/modstat.c
+--- modutils-2.4.27.0.orig/util/modstat.c	2002-11-24 21:01:57.000000000 -0700
++++ modutils-2.4.27.0/util/modstat.c	2005-09-29 14:41:13.000000000 -0600
+@@ -408,6 +408,7 @@
+ 
+ int get_kernel_info(int type)
+ {
++#if 0
+ 	k_new_syscalls = !query_module(NULL, 0, NULL, 0, NULL);
+ 
+ #ifdef COMPAT_2_0
+@@ -416,4 +417,7 @@
+ #endif /* COMPAT_2_0 */
+ 
+ 	return new_get_kernel_info(type);
++#else
++	return 1;
++#endif
+ }