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 static EFI_PHYSICAL_ADDRESS heap; 36 static UINTN heapsize; 37 38 void 39 efi_exit(EFI_STATUS exit_code) 40 { 41 42 BS->FreePages(heap, EFI_SIZE_TO_PAGES(heapsize)); 43 BS->Exit(IH, exit_code, 0, NULL); 44 } 45 46 void 47 exit(int status) 48 { 49 50 efi_exit(EFI_LOAD_ERROR); 51 } 52 53 static CHAR16 * 54 arg_skipsep(CHAR16 *argp) 55 { 56 57 while (*argp == ' ' || *argp == '\t' || *argp == '\n') 58 argp++; 59 return (argp); 60 } 61 62 static CHAR16 * 63 arg_skipword(CHAR16 *argp) 64 { 65 66 while (*argp && *argp != ' ' && *argp != '\t' && *argp != '\n') 67 argp++; 68 return (argp); 69 } 70 71 EFI_STATUS 72 efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table) 73 { 74 static EFI_GUID image_protocol = LOADED_IMAGE_PROTOCOL; 75 static EFI_GUID console_control_protocol = 76 EFI_CONSOLE_CONTROL_PROTOCOL_GUID; 77 EFI_CONSOLE_CONTROL_PROTOCOL *console_control = NULL; 78 EFI_LOADED_IMAGE *img; 79 CHAR16 *argp, *args, **argv; 80 EFI_STATUS status; 81 int argc, addprog; 82 83 IH = image_handle; 84 ST = system_table; 85 BS = ST->BootServices; 86 RS = ST->RuntimeServices; 87 88 status = BS->LocateProtocol(&console_control_protocol, NULL, 89 (VOID **)&console_control); 90 if (status == EFI_SUCCESS) 91 (void)console_control->SetMode(console_control, 92 EfiConsoleControlScreenText); 93 94 heapsize = 64 * 1024 * 1024; 95 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, 96 EFI_SIZE_TO_PAGES(heapsize), &heap); 97 if (status != EFI_SUCCESS) 98 BS->Exit(IH, status, 0, NULL); 99 100 setheap((void *)(uintptr_t)heap, (void *)(uintptr_t)(heap + heapsize)); 101 102 /* Use efi_exit() from here on... */ 103 104 status = BS->HandleProtocol(IH, &image_protocol, (VOID**)&img); 105 if (status != EFI_SUCCESS) 106 efi_exit(status); 107 108 /* 109 * Pre-process the (optional) load options. If the option string 110 * is given as an ASCII string, we use a poor man's ASCII to 111 * Unicode-16 translation. The size of the option string as given 112 * to us includes the terminating null character. We assume the 113 * string is an ASCII string if strlen() plus the terminating 114 * '\0' is less than LoadOptionsSize. Even if all Unicode-16 115 * characters have the upper 8 bits non-zero, the terminating 116 * null character will cause a one-off. 117 * If the string is already in Unicode-16, we make a copy so that 118 * we know we can always modify the string. 119 */ 120 if (img->LoadOptionsSize > 0 && img->LoadOptions != NULL) { 121 if (img->LoadOptionsSize == strlen(img->LoadOptions) + 1) { 122 args = malloc(img->LoadOptionsSize << 1); 123 for (argc = 0; argc < (int)img->LoadOptionsSize; argc++) 124 args[argc] = ((char*)img->LoadOptions)[argc]; 125 } else { 126 args = malloc(img->LoadOptionsSize); 127 memcpy(args, img->LoadOptions, img->LoadOptionsSize); 128 } 129 } else 130 args = NULL; 131 132 /* 133 * Use a quick and dirty algorithm to build the argv vector. We 134 * first count the number of words. Then, after allocating the 135 * vector, we split the string up. We don't deal with quotes or 136 * other more advanced shell features. 137 * The EFI shell will pass the name of the image as the first 138 * word in the argument list. This does not happen if we're 139 * loaded by the boot manager. This is not so easy to figure 140 * out though. The ParentHandle is not always NULL, because 141 * there can be a function (=image) that will perform the task 142 * for the boot manager. 143 */ 144 /* Part 1: Figure out if we need to add our program name. */ 145 addprog = (args == NULL || img->ParentHandle == NULL || 146 img->FilePath == NULL) ? 1 : 0; 147 if (!addprog) { 148 addprog = 149 (DevicePathType(img->FilePath) != MEDIA_DEVICE_PATH || 150 DevicePathSubType(img->FilePath) != MEDIA_FILEPATH_DP || 151 DevicePathNodeLength(img->FilePath) <= 152 sizeof(FILEPATH_DEVICE_PATH)) ? 1 : 0; 153 if (!addprog) { 154 /* XXX todo. */ 155 } 156 } 157 /* Part 2: count words. */ 158 argc = (addprog) ? 1 : 0; 159 argp = args; 160 while (argp != NULL && *argp != 0) { 161 argp = arg_skipsep(argp); 162 if (*argp == 0) 163 break; 164 argc++; 165 argp = arg_skipword(argp); 166 } 167 /* Part 3: build vector. */ 168 argv = malloc((argc + 1) * sizeof(CHAR16*)); 169 argc = 0; 170 if (addprog) 171 argv[argc++] = (CHAR16 *)L"loader.efi"; 172 argp = args; 173 while (argp != NULL && *argp != 0) { 174 argp = arg_skipsep(argp); 175 if (*argp == 0) 176 break; 177 argv[argc++] = argp; 178 argp = arg_skipword(argp); 179 /* Terminate the words. */ 180 if (*argp != 0) 181 *argp++ = 0; 182 } 183 argv[argc] = NULL; 184 185 status = main(argc, argv); 186 efi_exit(status); 187 return (status); 188 } 189