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 <bootstrap.h> 28 #include <efi.h> 29 #include <eficonsctl.h> 30 #include <efilib.h> 31 #include <stand.h> 32 33 static EFI_PHYSICAL_ADDRESS heap; 34 static UINTN heapsize; 35 36 void 37 efi_exit(EFI_STATUS exit_code) 38 { 39 40 if (boot_services_active) { 41 BS->FreePages(heap, EFI_SIZE_TO_PAGES(heapsize)); 42 BS->Exit(IH, exit_code, 0, NULL); 43 } else { 44 RS->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL); 45 } 46 } 47 48 void 49 exit(int status) 50 { 51 52 efi_exit(EFI_LOAD_ERROR); 53 } 54 55 static CHAR16 * 56 arg_skipsep(CHAR16 *argp) 57 { 58 59 while (*argp == ' ' || *argp == '\t' || *argp == '\n') 60 argp++; 61 return (argp); 62 } 63 64 static CHAR16 * 65 arg_skipword(CHAR16 *argp) 66 { 67 68 while (*argp && *argp != ' ' && *argp != '\t' && *argp != '\n') 69 argp++; 70 return (argp); 71 } 72 73 EFI_STATUS 74 efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table) 75 { 76 static EFI_GUID image_protocol = LOADED_IMAGE_PROTOCOL; 77 static EFI_GUID console_control_protocol = 78 EFI_CONSOLE_CONTROL_PROTOCOL_GUID; 79 EFI_CONSOLE_CONTROL_PROTOCOL *console_control = NULL; 80 EFI_LOADED_IMAGE *img; 81 CHAR16 *argp, *args, **argv; 82 EFI_STATUS status; 83 int argc, addprog; 84 85 IH = image_handle; 86 ST = system_table; 87 BS = ST->BootServices; 88 RS = ST->RuntimeServices; 89 90 status = BS->LocateProtocol(&console_control_protocol, NULL, 91 (VOID **)&console_control); 92 if (status == EFI_SUCCESS) 93 (void)console_control->SetMode(console_control, 94 EfiConsoleControlScreenText); 95 96 heapsize = 64 * 1024 * 1024; 97 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, 98 EFI_SIZE_TO_PAGES(heapsize), &heap); 99 if (status != EFI_SUCCESS) { 100 ST->ConOut->OutputString(ST->ConOut, (CHAR16 *)L"Failed to allocate memory for heap.\r\n"); 101 BS->Exit(IH, status, 0, NULL); 102 } 103 104 setheap((void *)(uintptr_t)heap, (void *)(uintptr_t)(heap + heapsize)); 105 106 /* Start tslog now that we have a heap.*/ 107 tslog_init(); 108 109 /* Use efi_exit() from here on... */ 110 111 status = OpenProtocolByHandle(IH, &image_protocol, (void**)&img); 112 if (status != EFI_SUCCESS) 113 efi_exit(status); 114 115 /* 116 * Pre-process the (optional) load options. If the option string 117 * is given as an ASCII string, we use a poor man's ASCII to 118 * Unicode-16 translation. The size of the option string as given 119 * to us includes the terminating null character. We assume the 120 * string is an ASCII string if strlen() plus the terminating 121 * '\0' is less than LoadOptionsSize. Even if all Unicode-16 122 * characters have the upper 8 bits non-zero, the terminating 123 * null character will cause a one-off. 124 * If the string is already in Unicode-16, we make a copy so that 125 * we know we can always modify the string. 126 */ 127 if (img->LoadOptionsSize > 0 && img->LoadOptions != NULL) { 128 if (img->LoadOptionsSize == strlen(img->LoadOptions) + 1) { 129 args = malloc(img->LoadOptionsSize << 1); 130 for (argc = 0; argc < (int)img->LoadOptionsSize; argc++) 131 args[argc] = ((char*)img->LoadOptions)[argc]; 132 } else { 133 args = malloc(img->LoadOptionsSize); 134 memcpy(args, img->LoadOptions, img->LoadOptionsSize); 135 } 136 } else 137 args = NULL; 138 139 /* 140 * Use a quick and dirty algorithm to build the argv vector. We 141 * first count the number of words. Then, after allocating the 142 * vector, we split the string up. We don't deal with quotes or 143 * other more advanced shell features. 144 * The EFI shell will pass the name of the image as the first 145 * word in the argument list. This does not happen if we're 146 * loaded by the boot manager. This is not so easy to figure 147 * out though. The ParentHandle is not always NULL, because 148 * there can be a function (=image) that will perform the task 149 * for the boot manager. 150 */ 151 /* Part 1: Figure out if we need to add our program name. */ 152 addprog = (args == NULL || img->ParentHandle == NULL || 153 img->FilePath == NULL) ? 1 : 0; 154 if (!addprog) { 155 addprog = 156 (DevicePathType(img->FilePath) != MEDIA_DEVICE_PATH || 157 DevicePathSubType(img->FilePath) != MEDIA_FILEPATH_DP || 158 DevicePathNodeLength(img->FilePath) <= 159 sizeof(FILEPATH_DEVICE_PATH)) ? 1 : 0; 160 if (!addprog) { 161 /* XXX todo. */ 162 } 163 } 164 /* Part 2: count words. */ 165 argc = (addprog) ? 1 : 0; 166 argp = args; 167 while (argp != NULL && *argp != 0) { 168 argp = arg_skipsep(argp); 169 if (*argp == 0) 170 break; 171 argc++; 172 argp = arg_skipword(argp); 173 } 174 /* Part 3: build vector. */ 175 argv = malloc((argc + 1) * sizeof(CHAR16*)); 176 argc = 0; 177 if (addprog) 178 argv[argc++] = (CHAR16 *)L"loader.efi"; 179 argp = args; 180 while (argp != NULL && *argp != 0) { 181 argp = arg_skipsep(argp); 182 if (*argp == 0) 183 break; 184 argv[argc++] = argp; 185 argp = arg_skipword(argp); 186 /* Terminate the words. */ 187 if (*argp != 0) 188 *argp++ = 0; 189 } 190 argv[argc] = NULL; 191 192 status = main(argc, argv); 193 efi_exit(status); 194 return (status); 195 } 196