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exec.c revision 1.2 
      1 /* $NetBSD: exec.c,v 1.2 2018/08/27 09:51:32 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2018 Jared McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include "efiboot.h"
     30 #include "efifdt.h"
     31 
     32 #include <loadfile.h>
     33 
     34 int
     35 exec_netbsd(const char *fname, const char *args)
     36 {
     37 	EFI_PHYSICAL_ADDRESS addr;
     38 	u_long marks[MARK_MAX], alloc_size;
     39 	EFI_STATUS status;
     40 	int fd;
     41 
     42 	memset(marks, 0, sizeof(marks));
     43 	fd = loadfile(fname, marks, COUNT_KERNEL | LOAD_NOTE);
     44 	if (fd < 0) {
     45 		printf("boot: %s: %s\n", fname, strerror(errno));
     46 		return EIO;
     47 	}
     48 	close(fd);
     49 	marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & (-sizeof(int));
     50 	alloc_size = marks[MARK_END] - marks[MARK_START] + EFIBOOT_ALIGN;
     51 
     52 #ifdef EFIBOOT_ALLOCATE_MAX_ADDRESS
     53 	addr = EFIBOOT_ALLOCATE_MAX_ADDRESS;
     54 	status = uefi_call_wrapper(BS->AllocatePages, 4, AllocateMaxAddress, EfiLoaderData,
     55 	    EFI_SIZE_TO_PAGES(alloc_size), &addr);
     56 #else
     57 	addr = 0;
     58 	status = uefi_call_wrapper(BS->AllocatePages, 4, AllocateAnyPages, EfiLoaderData,
     59 	    EFI_SIZE_TO_PAGES(alloc_size), &addr);
     60 #endif
     61 	if (EFI_ERROR(status)) {
     62 		printf("Failed to allocate %lu bytes for kernel image (error %lu)\n",
     63 		    alloc_size, status);
     64 		return ENOMEM;
     65 	}
     66 
     67 	memset(marks, 0, sizeof(marks));
     68 	marks[MARK_START] = (addr + EFIBOOT_ALIGN) & ~(EFIBOOT_ALIGN - 1);
     69 	fd = loadfile(fname, marks, LOAD_KERNEL);
     70 	if (fd < 0) {
     71 		printf("boot: %s: %s\n", fname, strerror(errno));
     72 		goto cleanup;
     73 	}
     74 	close(fd);
     75 
     76 	if (efi_fdt_size() > 0) {
     77 		efi_fdt_bootargs(args);
     78 		efi_fdt_memory_map();
     79 	}
     80 
     81 	efi_cleanup();
     82 	efi_boot_kernel(marks);
     83 
     84 	/* This should not happen.. */
     85 	printf("boot returned\n");
     86 
     87 cleanup:
     88 	uefi_call_wrapper(BS->FreePages, 2, addr, EFI_SIZE_TO_PAGES(alloc_size));
     89 	return EIO;
     90 }
     91