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 #include <bootstrap.h> 29 #include <efi.h> 30 #include <eficonsctl.h> 31 #include <efilib.h> 32 #include <stand.h> 33 34 static EFI_PHYSICAL_ADDRESS heap; 35 static UINTN heapsize; 36 37 void 38 efi_exit(EFI_STATUS exit_code) 39 { 40 41 if (boot_services_active) { 42 BS->FreePages(heap, EFI_SIZE_TO_PAGES(heapsize)); 43 BS->Exit(IH, exit_code, 0, NULL); 44 } else { 45 RS->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL); 46 } 47 } 48 49 void 50 exit(int status) 51 { 52 53 efi_exit(EFI_LOAD_ERROR); 54 } 55 56 static CHAR16 * 57 arg_skipsep(CHAR16 *argp) 58 { 59 60 while (*argp == ' ' || *argp == '\t' || *argp == '\n') 61 argp++; 62 return (argp); 63 } 64 65 static CHAR16 * 66 arg_skipword(CHAR16 *argp) 67 { 68 69 while (*argp && *argp != ' ' && *argp != '\t' && *argp != '\n') 70 argp++; 71 return (argp); 72 } 73 74 EFI_STATUS 75 efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table) 76 { 77 static EFI_GUID image_protocol = LOADED_IMAGE_PROTOCOL; 78 static EFI_GUID console_control_protocol = 79 EFI_CONSOLE_CONTROL_PROTOCOL_GUID; 80 EFI_CONSOLE_CONTROL_PROTOCOL *console_control = NULL; 81 EFI_LOADED_IMAGE *img; 82 CHAR16 *argp, *args, **argv; 83 EFI_STATUS status; 84 int argc, addprog; 85 86 IH = image_handle; 87 ST = system_table; 88 BS = ST->BootServices; 89 RS = ST->RuntimeServices; 90 91 status = BS->LocateProtocol(&console_control_protocol, NULL, 92 (VOID **)&console_control); 93 if (status == EFI_SUCCESS) 94 (void)console_control->SetMode(console_control, 95 EfiConsoleControlScreenText); 96 97 heapsize = 64 * 1024 * 1024; 98 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, 99 EFI_SIZE_TO_PAGES(heapsize), &heap); 100 if (status != EFI_SUCCESS) { 101 ST->ConOut->OutputString(ST->ConOut, (CHAR16 *)L"Failed to allocate memory for heap.\r\n"); 102 BS->Exit(IH, status, 0, NULL); 103 } 104 105 setheap((void *)(uintptr_t)heap, (void *)(uintptr_t)(heap + heapsize)); 106 107 /* Start tslog now that we have a heap.*/ 108 tslog_init(); 109 110 /* Use efi_exit() from here on... */ 111 112 status = OpenProtocolByHandle(IH, &image_protocol, (void**)&img); 113 if (status != EFI_SUCCESS) 114 efi_exit(status); 115 116 /* 117 * Pre-process the (optional) load options. If the option string 118 * is given as an ASCII string, we use a poor man's ASCII to 119 * Unicode-16 translation. The size of the option string as given 120 * to us includes the terminating null character. We assume the 121 * string is an ASCII string if strlen() plus the terminating 122 * '\0' is less than LoadOptionsSize. Even if all Unicode-16 123 * characters have the upper 8 bits non-zero, the terminating 124 * null character will cause a one-off. 125 * If the string is already in Unicode-16, we make a copy so that 126 * we know we can always modify the string. 127 */ 128 if (img->LoadOptionsSize > 0 && img->LoadOptions != NULL) { 129 if (img->LoadOptionsSize == strlen(img->LoadOptions) + 1) { 130 args = malloc(img->LoadOptionsSize << 1); 131 for (argc = 0; argc < (int)img->LoadOptionsSize; argc++) 132 args[argc] = ((char*)img->LoadOptions)[argc]; 133 } else { 134 args = malloc(img->LoadOptionsSize); 135 memcpy(args, img->LoadOptions, img->LoadOptionsSize); 136 } 137 } else 138 args = NULL; 139 140 /* 141 * Use a quick and dirty algorithm to build the argv vector. We 142 * first count the number of words. Then, after allocating the 143 * vector, we split the string up. We don't deal with quotes or 144 * other more advanced shell features. 145 * The EFI shell will pass the name of the image as the first 146 * word in the argument list. This does not happen if we're 147 * loaded by the boot manager. This is not so easy to figure 148 * out though. The ParentHandle is not always NULL, because 149 * there can be a function (=image) that will perform the task 150 * for the boot manager. 151 */ 152 /* Part 1: Figure out if we need to add our program name. */ 153 addprog = (args == NULL || img->ParentHandle == NULL || 154 img->FilePath == NULL) ? 1 : 0; 155 if (!addprog) { 156 addprog = 157 (DevicePathType(img->FilePath) != MEDIA_DEVICE_PATH || 158 DevicePathSubType(img->FilePath) != MEDIA_FILEPATH_DP || 159 DevicePathNodeLength(img->FilePath) <= 160 sizeof(FILEPATH_DEVICE_PATH)) ? 1 : 0; 161 if (!addprog) { 162 /* XXX todo. */ 163 } 164 } 165 /* Part 2: count words. */ 166 argc = (addprog) ? 1 : 0; 167 argp = args; 168 while (argp != NULL && *argp != 0) { 169 argp = arg_skipsep(argp); 170 if (*argp == 0) 171 break; 172 argc++; 173 argp = arg_skipword(argp); 174 } 175 /* Part 3: build vector. */ 176 argv = malloc((argc + 1) * sizeof(CHAR16*)); 177 argc = 0; 178 if (addprog) 179 argv[argc++] = (CHAR16 *)L"loader.efi"; 180 argp = args; 181 while (argp != NULL && *argp != 0) { 182 argp = arg_skipsep(argp); 183 if (*argp == 0) 184 break; 185 argv[argc++] = argp; 186 argp = arg_skipword(argp); 187 /* Terminate the words. */ 188 if (*argp != 0) 189 *argp++ = 0; 190 } 191 argv[argc] = NULL; 192 193 status = main(argc, argv); 194 efi_exit(status); 195 return (status); 196 } 197