Function xen_legacy_pvh_parse_preload_data

freebsd/x86/xen/pv.c:513–558

#endif

static caddr_t
xen_legacy_pvh_parse_preload_data(uint64_t modulep)
{
	caddr_t		 kmdp;
	vm_ooffset_t	 off;
	vm_paddr_t	 metadata;
	char             *envp;

	if (legacy_start_info->mod_start != 0) {
		preload_metadata = (caddr_t)legacy_start_info->mod_start;

		kmdp = preload_search_by_type("elf kernel");
		if (kmdp == NULL)
			kmdp = preload_search_by_type("elf64 kernel");
		KASSERT(kmdp != NULL, ("unable to find kernel"));

		/*
		 * Xen has relocated the metadata and the modules,
		 * so we need to recalculate it's position. This is
		 * done by saving the original modulep address and
		 * then calculating the offset with mod_start,
		 * which contains the relocated modulep address.
		 */
		metadata = MD_FETCH(kmdp, MODINFOMD_MODULEP, vm_paddr_t);
		off = legacy_start_info->mod_start - metadata;

		preload_bootstrap_relocate(off);

		boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
		envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
		if (envp != NULL)
			envp += off;
		xen_pvh_set_env(envp, NULL);
	} else {
		/* Parse the extra boot information given by Xen */
		boot_parse_cmdline_delim(legacy_start_info->cmd_line, ",");
		kmdp = NULL;
	}

	boothowto |= boot_env_to_howto();

#ifdef DDB
	xen_pvh_parse_symtab();
#endif
	return (kmdp);
}

static caddr_t
xen_pvh_parse_preload_data(uint64_t modulep)