efi.c revision 1.2.2.2
1 1.2.2.2 simonb /* $NetBSD: efi.c,v 1.2.2.2 2006/04/22 11:37:39 simonb Exp $ */ 2 1.2.2.2 simonb 3 1.2.2.2 simonb /*- 4 1.2.2.2 simonb * Copyright (c) 2000 Doug Rabson 5 1.2.2.2 simonb * All rights reserved. 6 1.2.2.2 simonb * 7 1.2.2.2 simonb * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 simonb * modification, are permitted provided that the following conditions 9 1.2.2.2 simonb * are met: 10 1.2.2.2 simonb * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 simonb * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 simonb * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 simonb * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 simonb * documentation and/or other materials provided with the distribution. 15 1.2.2.2 simonb * 16 1.2.2.2 simonb * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.2.2.2 simonb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.2.2.2 simonb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.2.2.2 simonb * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.2.2.2 simonb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.2.2.2 simonb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.2.2.2 simonb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.2.2.2 simonb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.2.2.2 simonb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 simonb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 simonb * SUCH DAMAGE. 27 1.2.2.2 simonb */ 28 1.2.2.2 simonb 29 1.2.2.2 simonb #include <sys/cdefs.h> 30 1.2.2.2 simonb 31 1.2.2.2 simonb #include <efi.h> 32 1.2.2.2 simonb #include <efilib.h> 33 1.2.2.2 simonb #include <lib/libsa/stand.h> 34 1.2.2.2 simonb 35 1.2.2.2 simonb EFI_HANDLE IH; 36 1.2.2.2 simonb EFI_SYSTEM_TABLE *ST; 37 1.2.2.2 simonb EFI_BOOT_SERVICES *BS; 38 1.2.2.2 simonb EFI_RUNTIME_SERVICES *RS; 39 1.2.2.2 simonb 40 1.2.2.2 simonb static EFI_PHYSICAL_ADDRESS heap; 41 1.2.2.2 simonb static UINTN heapsize; 42 1.2.2.2 simonb 43 1.2.2.2 simonb static CHAR16 * 44 1.2.2.2 simonb arg_skipsep(CHAR16 *argp) 45 1.2.2.2 simonb { 46 1.2.2.2 simonb 47 1.2.2.2 simonb while (*argp == ' ' || *argp == '\t') 48 1.2.2.2 simonb argp++; 49 1.2.2.2 simonb return (argp); 50 1.2.2.2 simonb } 51 1.2.2.2 simonb 52 1.2.2.2 simonb static CHAR16 * 53 1.2.2.2 simonb arg_skipword(CHAR16 *argp) 54 1.2.2.2 simonb { 55 1.2.2.2 simonb 56 1.2.2.2 simonb while (*argp && *argp != ' ' && *argp != '\t') 57 1.2.2.2 simonb argp++; 58 1.2.2.2 simonb return (argp); 59 1.2.2.2 simonb } 60 1.2.2.2 simonb 61 1.2.2.2 simonb void * 62 1.2.2.2 simonb efi_get_table(EFI_GUID *tbl) 63 1.2.2.2 simonb { 64 1.2.2.2 simonb EFI_GUID *id; 65 1.2.2.2 simonb int i; 66 1.2.2.2 simonb 67 1.2.2.2 simonb for (i = 0; i < ST->NumberOfTableEntries; i++) { 68 1.2.2.2 simonb id = &ST->ConfigurationTable[i].VendorGuid; 69 1.2.2.2 simonb if (!memcmp(id, tbl, sizeof(EFI_GUID))) 70 1.2.2.2 simonb return (ST->ConfigurationTable[i].VendorTable); 71 1.2.2.2 simonb } 72 1.2.2.2 simonb return (NULL); 73 1.2.2.2 simonb } 74 1.2.2.2 simonb 75 1.2.2.2 simonb void efi_exit(EFI_STATUS exit_code) 76 1.2.2.2 simonb { 77 1.2.2.2 simonb 78 1.2.2.2 simonb BS->FreePages(heap, EFI_SIZE_TO_PAGES(heapsize)); 79 1.2.2.2 simonb BS->Exit(IH, exit_code, 0, NULL); 80 1.2.2.2 simonb } 81 1.2.2.2 simonb 82 1.2.2.2 simonb void 83 1.2.2.2 simonb efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table) 84 1.2.2.2 simonb { 85 1.2.2.2 simonb static EFI_GUID image_protocol = LOADED_IMAGE_PROTOCOL; 86 1.2.2.2 simonb EFI_LOADED_IMAGE *img; 87 1.2.2.2 simonb CHAR16 *argp, *args, **argv; 88 1.2.2.2 simonb EFI_STATUS status; 89 1.2.2.2 simonb int argc, addprog; 90 1.2.2.2 simonb 91 1.2.2.2 simonb IH = image_handle; 92 1.2.2.2 simonb ST = system_table; 93 1.2.2.2 simonb BS = ST->BootServices; 94 1.2.2.2 simonb RS = ST->RuntimeServices; 95 1.2.2.2 simonb 96 1.2.2.2 simonb heapsize = 512*1024; 97 1.2.2.2 simonb status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, 98 1.2.2.2 simonb EFI_SIZE_TO_PAGES(heapsize), &heap); 99 1.2.2.2 simonb if (status != EFI_SUCCESS) 100 1.2.2.2 simonb BS->Exit(IH, status, 0, NULL); 101 1.2.2.2 simonb 102 1.2.2.2 simonb setheap((void *)heap, (void *)(heap + heapsize)); 103 1.2.2.2 simonb 104 1.2.2.2 simonb /* Use efi_exit() from here on... */ 105 1.2.2.2 simonb 106 1.2.2.2 simonb status = BS->HandleProtocol(IH, &image_protocol, (VOID**)&img); 107 1.2.2.2 simonb if (status != EFI_SUCCESS) 108 1.2.2.2 simonb efi_exit(status); 109 1.2.2.2 simonb 110 1.2.2.2 simonb /* 111 1.2.2.2 simonb * Pre-process the (optional) load options. If the option string 112 1.2.2.2 simonb * is given as an ASCII string, we use a poor man's ASCII to 113 1.2.2.2 simonb * Unicode-16 translation. The size of the option string as given 114 1.2.2.2 simonb * to us includes the terminating null character. We assume the 115 1.2.2.2 simonb * string is an ASCII string if strlen() plus the terminating 116 1.2.2.2 simonb * '\0' is less than LoadOptionsSize. Even if all Unicode-16 117 1.2.2.2 simonb * characters have the upper 8 bits non-zero, the terminating 118 1.2.2.2 simonb * null character will cause a one-off. 119 1.2.2.2 simonb * If the string is already in Unicode-16, we make a copy so that 120 1.2.2.2 simonb * we know we can always modify the string. 121 1.2.2.2 simonb */ 122 1.2.2.2 simonb if (img->LoadOptionsSize > 0 && img->LoadOptions != NULL) { 123 1.2.2.2 simonb if (img->LoadOptionsSize == strlen(img->LoadOptions) + 1) { 124 1.2.2.2 simonb args = alloc(img->LoadOptionsSize << 1); 125 1.2.2.2 simonb for (argc = 0; argc < img->LoadOptionsSize; argc++) 126 1.2.2.2 simonb args[argc] = ((char*)img->LoadOptions)[argc]; 127 1.2.2.2 simonb } else { 128 1.2.2.2 simonb args = alloc(img->LoadOptionsSize); 129 1.2.2.2 simonb memcpy(args, img->LoadOptions, img->LoadOptionsSize); 130 1.2.2.2 simonb } 131 1.2.2.2 simonb } else 132 1.2.2.2 simonb args = NULL; 133 1.2.2.2 simonb 134 1.2.2.2 simonb /* 135 1.2.2.2 simonb * Use a quick and dirty algorithm to build the argv vector. We 136 1.2.2.2 simonb * first count the number of words. Then, after allocating the 137 1.2.2.2 simonb * vector, we split the string up. We don't deal with quotes or 138 1.2.2.2 simonb * other more advanced shell features. 139 1.2.2.2 simonb * The EFI shell will pas the name of the image as the first 140 1.2.2.2 simonb * word in the argument list. This does not happen if we're 141 1.2.2.2 simonb * loaded by the boot manager. This is not so easy to figure 142 1.2.2.2 simonb * out though. The ParentHandle is not always NULL, because 143 1.2.2.2 simonb * there can be a function (=image) that will perform the task 144 1.2.2.2 simonb * for the boot manager. 145 1.2.2.2 simonb */ 146 1.2.2.2 simonb /* Part 1: Figure out if we need to add our program name. */ 147 1.2.2.2 simonb addprog = (args == NULL || img->ParentHandle == NULL || 148 1.2.2.2 simonb img->FilePath == NULL) ? 1 : 0; 149 1.2.2.2 simonb if (!addprog) { 150 1.2.2.2 simonb addprog = 151 1.2.2.2 simonb (DevicePathType(img->FilePath) != MEDIA_DEVICE_PATH || 152 1.2.2.2 simonb DevicePathSubType(img->FilePath) != MEDIA_FILEPATH_DP || 153 1.2.2.2 simonb DevicePathNodeLength(img->FilePath) <= 154 1.2.2.2 simonb sizeof(FILEPATH_DEVICE_PATH)) ? 1 : 0; 155 1.2.2.2 simonb if (!addprog) { 156 1.2.2.2 simonb /* XXX todo. */ 157 1.2.2.2 simonb } 158 1.2.2.2 simonb } 159 1.2.2.2 simonb /* Part 2: count words. */ 160 1.2.2.2 simonb argc = (addprog) ? 1 : 0; 161 1.2.2.2 simonb argp = args; 162 1.2.2.2 simonb while (argp != NULL && *argp != 0) { 163 1.2.2.2 simonb argp = arg_skipsep(argp); 164 1.2.2.2 simonb if (*argp == 0) 165 1.2.2.2 simonb break; 166 1.2.2.2 simonb argc++; 167 1.2.2.2 simonb argp = arg_skipword(argp); 168 1.2.2.2 simonb } 169 1.2.2.2 simonb /* Part 3: build vector. */ 170 1.2.2.2 simonb argv = alloc((argc + 1) * sizeof(CHAR16*)); 171 1.2.2.2 simonb argc = 0; 172 1.2.2.2 simonb if (addprog) 173 1.2.2.2 simonb argv[argc++] = L"loader.efi"; 174 1.2.2.2 simonb argp = args; 175 1.2.2.2 simonb while (argp != NULL && *argp != 0) { 176 1.2.2.2 simonb argp = arg_skipsep(argp); 177 1.2.2.2 simonb if (*argp == 0) 178 1.2.2.2 simonb break; 179 1.2.2.2 simonb argv[argc++] = argp; 180 1.2.2.2 simonb argp = arg_skipword(argp); 181 1.2.2.2 simonb /* Terminate the words. */ 182 1.2.2.2 simonb if (*argp != 0) 183 1.2.2.2 simonb *argp++ = 0; 184 1.2.2.2 simonb } 185 1.2.2.2 simonb argv[argc] = NULL; 186 1.2.2.2 simonb 187 1.2.2.2 simonb status = main(argc, argv); 188 1.2.2.2 simonb efi_exit(status); 189 1.2.2.2 simonb } 190
Indexes created Thu Oct 02 10:09:58 GMT 2025