efi.c revision 1.1.2.2
1 1.1.2.2 yamt /* $NetBSD: efi.c,v 1.1.2.2 2006/04/11 11:53:42 yamt Exp $ */ 2 1.1.2.2 yamt 3 1.1.2.2 yamt /*- 4 1.1.2.2 yamt * Copyright (c) 2000 Doug Rabson 5 1.1.2.2 yamt * All rights reserved. 6 1.1.2.2 yamt * 7 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 yamt * modification, are permitted provided that the following conditions 9 1.1.2.2 yamt * are met: 10 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 15 1.1.2.2 yamt * 16 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.1.2.2 yamt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.1.2.2 yamt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.1.2.2 yamt * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.1.2.2 yamt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.1.2.2 yamt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.1.2.2 yamt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.1.2.2 yamt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.1.2.2 yamt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.1.2.2 yamt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.1.2.2 yamt * SUCH DAMAGE. 27 1.1.2.2 yamt */ 28 1.1.2.2 yamt 29 1.1.2.2 yamt #include <sys/cdefs.h> 30 1.1.2.2 yamt 31 1.1.2.2 yamt #include <efi.h> 32 1.1.2.2 yamt #include <efilib.h> 33 1.1.2.2 yamt #include <lib/libsa/stand.h> 34 1.1.2.2 yamt 35 1.1.2.2 yamt EFI_HANDLE IH; 36 1.1.2.2 yamt EFI_SYSTEM_TABLE *ST; 37 1.1.2.2 yamt EFI_BOOT_SERVICES *BS; 38 1.1.2.2 yamt EFI_RUNTIME_SERVICES *RS; 39 1.1.2.2 yamt 40 1.1.2.2 yamt static EFI_PHYSICAL_ADDRESS heap; 41 1.1.2.2 yamt static UINTN heapsize; 42 1.1.2.2 yamt 43 1.1.2.2 yamt static CHAR16 * 44 1.1.2.2 yamt arg_skipsep(CHAR16 *argp) 45 1.1.2.2 yamt { 46 1.1.2.2 yamt 47 1.1.2.2 yamt while (*argp == ' ' || *argp == '\t') 48 1.1.2.2 yamt argp++; 49 1.1.2.2 yamt return (argp); 50 1.1.2.2 yamt } 51 1.1.2.2 yamt 52 1.1.2.2 yamt static CHAR16 * 53 1.1.2.2 yamt arg_skipword(CHAR16 *argp) 54 1.1.2.2 yamt { 55 1.1.2.2 yamt 56 1.1.2.2 yamt while (*argp && *argp != ' ' && *argp != '\t') 57 1.1.2.2 yamt argp++; 58 1.1.2.2 yamt return (argp); 59 1.1.2.2 yamt } 60 1.1.2.2 yamt 61 1.1.2.2 yamt void * 62 1.1.2.2 yamt efi_get_table(EFI_GUID *tbl) 63 1.1.2.2 yamt { 64 1.1.2.2 yamt EFI_GUID *id; 65 1.1.2.2 yamt int i; 66 1.1.2.2 yamt 67 1.1.2.2 yamt for (i = 0; i < ST->NumberOfTableEntries; i++) { 68 1.1.2.2 yamt id = &ST->ConfigurationTable[i].VendorGuid; 69 1.1.2.2 yamt if (!memcmp(id, tbl, sizeof(EFI_GUID))) 70 1.1.2.2 yamt return (ST->ConfigurationTable[i].VendorTable); 71 1.1.2.2 yamt } 72 1.1.2.2 yamt return (NULL); 73 1.1.2.2 yamt } 74 1.1.2.2 yamt 75 1.1.2.2 yamt void efi_exit(EFI_STATUS exit_code) 76 1.1.2.2 yamt { 77 1.1.2.2 yamt 78 1.1.2.2 yamt BS->FreePages(heap, EFI_SIZE_TO_PAGES(heapsize)); 79 1.1.2.2 yamt BS->Exit(IH, exit_code, 0, NULL); 80 1.1.2.2 yamt } 81 1.1.2.2 yamt 82 1.1.2.2 yamt void 83 1.1.2.2 yamt efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table) 84 1.1.2.2 yamt { 85 1.1.2.2 yamt static EFI_GUID image_protocol = LOADED_IMAGE_PROTOCOL; 86 1.1.2.2 yamt EFI_LOADED_IMAGE *img; 87 1.1.2.2 yamt CHAR16 *argp, *args, **argv; 88 1.1.2.2 yamt EFI_STATUS status; 89 1.1.2.2 yamt int argc, addprog; 90 1.1.2.2 yamt 91 1.1.2.2 yamt IH = image_handle; 92 1.1.2.2 yamt ST = system_table; 93 1.1.2.2 yamt BS = ST->BootServices; 94 1.1.2.2 yamt RS = ST->RuntimeServices; 95 1.1.2.2 yamt 96 1.1.2.2 yamt heapsize = 512*1024; 97 1.1.2.2 yamt status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, 98 1.1.2.2 yamt EFI_SIZE_TO_PAGES(heapsize), &heap); 99 1.1.2.2 yamt if (status != EFI_SUCCESS) 100 1.1.2.2 yamt BS->Exit(IH, status, 0, NULL); 101 1.1.2.2 yamt 102 1.1.2.2 yamt setheap((void *)heap, (void *)(heap + heapsize)); 103 1.1.2.2 yamt 104 1.1.2.2 yamt /* Use efi_exit() from here on... */ 105 1.1.2.2 yamt 106 1.1.2.2 yamt status = BS->HandleProtocol(IH, &image_protocol, (VOID**)&img); 107 1.1.2.2 yamt if (status != EFI_SUCCESS) 108 1.1.2.2 yamt efi_exit(status); 109 1.1.2.2 yamt 110 1.1.2.2 yamt /* 111 1.1.2.2 yamt * Pre-process the (optional) load options. If the option string 112 1.1.2.2 yamt * is given as an ASCII string, we use a poor man's ASCII to 113 1.1.2.2 yamt * Unicode-16 translation. The size of the option string as given 114 1.1.2.2 yamt * to us includes the terminating null character. We assume the 115 1.1.2.2 yamt * string is an ASCII string if strlen() plus the terminating 116 1.1.2.2 yamt * '\0' is less than LoadOptionsSize. Even if all Unicode-16 117 1.1.2.2 yamt * characters have the upper 8 bits non-zero, the terminating 118 1.1.2.2 yamt * null character will cause a one-off. 119 1.1.2.2 yamt * If the string is already in Unicode-16, we make a copy so that 120 1.1.2.2 yamt * we know we can always modify the string. 121 1.1.2.2 yamt */ 122 1.1.2.2 yamt if (img->LoadOptionsSize > 0 && img->LoadOptions != NULL) { 123 1.1.2.2 yamt if (img->LoadOptionsSize == strlen(img->LoadOptions) + 1) { 124 1.1.2.2 yamt args = alloc(img->LoadOptionsSize << 1); 125 1.1.2.2 yamt for (argc = 0; argc < img->LoadOptionsSize; argc++) 126 1.1.2.2 yamt args[argc] = ((char*)img->LoadOptions)[argc]; 127 1.1.2.2 yamt } else { 128 1.1.2.2 yamt args = alloc(img->LoadOptionsSize); 129 1.1.2.2 yamt memcpy(args, img->LoadOptions, img->LoadOptionsSize); 130 1.1.2.2 yamt } 131 1.1.2.2 yamt } else 132 1.1.2.2 yamt args = NULL; 133 1.1.2.2 yamt 134 1.1.2.2 yamt /* 135 1.1.2.2 yamt * Use a quick and dirty algorithm to build the argv vector. We 136 1.1.2.2 yamt * first count the number of words. Then, after allocating the 137 1.1.2.2 yamt * vector, we split the string up. We don't deal with quotes or 138 1.1.2.2 yamt * other more advanced shell features. 139 1.1.2.2 yamt * The EFI shell will pas the name of the image as the first 140 1.1.2.2 yamt * word in the argument list. This does not happen if we're 141 1.1.2.2 yamt * loaded by the boot manager. This is not so easy to figure 142 1.1.2.2 yamt * out though. The ParentHandle is not always NULL, because 143 1.1.2.2 yamt * there can be a function (=image) that will perform the task 144 1.1.2.2 yamt * for the boot manager. 145 1.1.2.2 yamt */ 146 1.1.2.2 yamt /* Part 1: Figure out if we need to add our program name. */ 147 1.1.2.2 yamt addprog = (args == NULL || img->ParentHandle == NULL || 148 1.1.2.2 yamt img->FilePath == NULL) ? 1 : 0; 149 1.1.2.2 yamt if (!addprog) { 150 1.1.2.2 yamt addprog = 151 1.1.2.2 yamt (DevicePathType(img->FilePath) != MEDIA_DEVICE_PATH || 152 1.1.2.2 yamt DevicePathSubType(img->FilePath) != MEDIA_FILEPATH_DP || 153 1.1.2.2 yamt DevicePathNodeLength(img->FilePath) <= 154 1.1.2.2 yamt sizeof(FILEPATH_DEVICE_PATH)) ? 1 : 0; 155 1.1.2.2 yamt if (!addprog) { 156 1.1.2.2 yamt /* XXX todo. */ 157 1.1.2.2 yamt } 158 1.1.2.2 yamt } 159 1.1.2.2 yamt /* Part 2: count words. */ 160 1.1.2.2 yamt argc = (addprog) ? 1 : 0; 161 1.1.2.2 yamt argp = args; 162 1.1.2.2 yamt while (argp != NULL && *argp != 0) { 163 1.1.2.2 yamt argp = arg_skipsep(argp); 164 1.1.2.2 yamt if (*argp == 0) 165 1.1.2.2 yamt break; 166 1.1.2.2 yamt argc++; 167 1.1.2.2 yamt argp = arg_skipword(argp); 168 1.1.2.2 yamt } 169 1.1.2.2 yamt /* Part 3: build vector. */ 170 1.1.2.2 yamt argv = alloc((argc + 1) * sizeof(CHAR16*)); 171 1.1.2.2 yamt argc = 0; 172 1.1.2.2 yamt if (addprog) 173 1.1.2.2 yamt argv[argc++] = L"loader.efi"; 174 1.1.2.2 yamt argp = args; 175 1.1.2.2 yamt while (argp != NULL && *argp != 0) { 176 1.1.2.2 yamt argp = arg_skipsep(argp); 177 1.1.2.2 yamt if (*argp == 0) 178 1.1.2.2 yamt break; 179 1.1.2.2 yamt argv[argc++] = argp; 180 1.1.2.2 yamt argp = arg_skipword(argp); 181 1.1.2.2 yamt /* Terminate the words. */ 182 1.1.2.2 yamt if (*argp != 0) 183 1.1.2.2 yamt *argp++ = 0; 184 1.1.2.2 yamt } 185 1.1.2.2 yamt argv[argc] = NULL; 186 1.1.2.2 yamt 187 1.1.2.2 yamt status = main(argc, argv); 188 1.1.2.2 yamt efi_exit(status); 189 1.1.2.2 yamt } 190
Indexes created Thu Oct 02 10:09:58 GMT 2025