1 /*- 2 * Copyright (c) 2000 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <efi.h> 31 #include <eficonsctl.h> 32 #include <efilib.h> 33 #include <stand.h> 34 35 EFI_HANDLE IH; 36 EFI_SYSTEM_TABLE *ST; 37 EFI_BOOT_SERVICES *BS; 38 EFI_RUNTIME_SERVICES *RS; 39 40 static EFI_PHYSICAL_ADDRESS heap; 41 static UINTN heapsize; 42 43 static CHAR16 * 44 arg_skipsep(CHAR16 *argp) 45 { 46 47 while (*argp == ' ' || *argp == '\t' || *argp == '\n') 48 argp++; 49 return (argp); 50 } 51 52 static CHAR16 * 53 arg_skipword(CHAR16 *argp) 54 { 55 56 while (*argp && *argp != ' ' && *argp != '\t' && *argp != '\n') 57 argp++; 58 return (argp); 59 } 60 61 void * 62 efi_get_table(EFI_GUID *tbl) 63 { 64 EFI_GUID *id; 65 int i; 66 67 for (i = 0; i < ST->NumberOfTableEntries; i++) { 68 id = &ST->ConfigurationTable[i].VendorGuid; 69 if (!memcmp(id, tbl, sizeof(EFI_GUID))) 70 return (ST->ConfigurationTable[i].VendorTable); 71 } 72 return (NULL); 73 } 74 75 void exit(EFI_STATUS exit_code) 76 { 77 78 BS->FreePages(heap, EFI_SIZE_TO_PAGES(heapsize)); 79 BS->Exit(IH, exit_code, 0, NULL); 80 } 81 82 void 83 efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table) 84 { 85 static EFI_GUID image_protocol = LOADED_IMAGE_PROTOCOL; 86 static EFI_GUID console_control_protocol = 87 EFI_CONSOLE_CONTROL_PROTOCOL_GUID; 88 EFI_CONSOLE_CONTROL_PROTOCOL *console_control = NULL; 89 EFI_LOADED_IMAGE *img; 90 CHAR16 *argp, *args, **argv; 91 EFI_STATUS status; 92 int argc, addprog; 93 94 IH = image_handle; 95 ST = system_table; 96 BS = ST->BootServices; 97 RS = ST->RuntimeServices; 98 99 status = BS->LocateProtocol(&console_control_protocol, NULL, 100 (VOID **)&console_control); 101 if (status == EFI_SUCCESS) 102 (void)console_control->SetMode(console_control, 103 EfiConsoleControlScreenText); 104 105 heapsize = 64 * 1024 * 1024; 106 /* 4GB upper limit, try to leave some space from 1MB */ 107 heap = 0x0000000100000000; 108 status = BS->AllocatePages(AllocateMaxAddress, EfiLoaderData, 109 EFI_SIZE_TO_PAGES(heapsize), &heap); 110 if (status != EFI_SUCCESS) 111 BS->Exit(IH, status, 0, NULL); 112 113 setheap((void *)(uintptr_t)heap, (void *)(uintptr_t)(heap + heapsize)); 114 115 /* Use exit() from here on... */ 116 117 status = BS->HandleProtocol(IH, &image_protocol, (VOID**)&img); 118 if (status != EFI_SUCCESS) 119 exit(status); 120 121 /* 122 * Pre-process the (optional) load options. If the option string 123 * is given as an ASCII string, we use a poor man's ASCII to 124 * Unicode-16 translation. The size of the option string as given 125 * to us includes the terminating null character. We assume the 126 * string is an ASCII string if strlen() plus the terminating 127 * '\0' is less than LoadOptionsSize. Even if all Unicode-16 128 * characters have the upper 8 bits non-zero, the terminating 129 * null character will cause a one-off. 130 * If the string is already in Unicode-16, we make a copy so that 131 * we know we can always modify the string. 132 */ 133 if (img->LoadOptionsSize > 0 && img->LoadOptions != NULL) { 134 if (img->LoadOptionsSize == strlen(img->LoadOptions) + 1) { 135 args = malloc(img->LoadOptionsSize << 1); 136 for (argc = 0; argc < img->LoadOptionsSize; argc++) 137 args[argc] = ((char*)img->LoadOptions)[argc]; 138 } else { 139 args = malloc(img->LoadOptionsSize); 140 memcpy(args, img->LoadOptions, img->LoadOptionsSize); 141 } 142 } else 143 args = NULL; 144 145 /* 146 * Use a quick and dirty algorithm to build the argv vector. We 147 * first count the number of words. Then, after allocating the 148 * vector, we split the string up. We don't deal with quotes or 149 * other more advanced shell features. 150 * The EFI shell will pass the name of the image as the first 151 * word in the argument list. This does not happen if we're 152 * loaded by the boot manager. This is not so easy to figure 153 * out though. The ParentHandle is not always NULL, because 154 * there can be a function (=image) that will perform the task 155 * for the boot manager. 156 */ 157 /* Part 1: Figure out if we need to add our program name. */ 158 addprog = (args == NULL || img->ParentHandle == NULL || 159 img->FilePath == NULL) ? 1 : 0; 160 if (!addprog) { 161 addprog = 162 (DevicePathType(img->FilePath) != MEDIA_DEVICE_PATH || 163 DevicePathSubType(img->FilePath) != MEDIA_FILEPATH_DP || 164 DevicePathNodeLength(img->FilePath) <= 165 sizeof(FILEPATH_DEVICE_PATH)) ? 1 : 0; 166 if (!addprog) { 167 /* XXX todo. */ 168 } 169 } 170 /* Part 2: count words. */ 171 argc = (addprog) ? 1 : 0; 172 argp = args; 173 while (argp != NULL && *argp != 0) { 174 argp = arg_skipsep(argp); 175 if (*argp == 0) 176 break; 177 argc++; 178 argp = arg_skipword(argp); 179 } 180 /* Part 3: build vector. */ 181 argv = malloc((argc + 1) * sizeof(CHAR16*)); 182 argc = 0; 183 if (addprog) 184 argv[argc++] = (CHAR16 *)L"loader.efi"; 185 argp = args; 186 while (argp != NULL && *argp != 0) { 187 argp = arg_skipsep(argp); 188 if (*argp == 0) 189 break; 190 argv[argc++] = argp; 191 argp = arg_skipword(argp); 192 /* Terminate the words. */ 193 if (*argp != 0) 194 *argp++ = 0; 195 } 196 argv[argc] = NULL; 197 198 status = main(argc, argv); 199 exit(status); 200 } 201