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 __unreachable(); 47 } 48 49 void 50 exit(int status) 51 { 52 53 efi_exit(errno_to_efi_status(status)); 54 __unreachable(); 55 } 56 57 static CHAR16 * 58 arg_skipsep(CHAR16 *argp) 59 { 60 61 while (*argp == ' ' || *argp == '\t' || *argp == '\n') 62 argp++; 63 return (argp); 64 } 65 66 static CHAR16 * 67 arg_skipword(CHAR16 *argp) 68 { 69 70 while (*argp && *argp != ' ' && *argp != '\t' && *argp != '\n') 71 argp++; 72 return (argp); 73 } 74 75 EFI_STATUS 76 efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table) 77 { 78 static EFI_GUID image_protocol = LOADED_IMAGE_PROTOCOL; 79 static EFI_GUID console_control_protocol = 80 EFI_CONSOLE_CONTROL_PROTOCOL_GUID; 81 EFI_CONSOLE_CONTROL_PROTOCOL *console_control = NULL; 82 EFI_LOADED_IMAGE *img; 83 CHAR16 *argp, *args, **argv; 84 EFI_STATUS status; 85 int argc, addprog; 86 87 IH = image_handle; 88 ST = system_table; 89 BS = ST->BootServices; 90 RS = ST->RuntimeServices; 91 92 status = BS->LocateProtocol(&console_control_protocol, NULL, 93 (VOID **)&console_control); 94 if (status == EFI_SUCCESS) 95 (void)console_control->SetMode(console_control, 96 EfiConsoleControlScreenText); 97 98 heapsize = 64 * 1024 * 1024; 99 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, 100 EFI_SIZE_TO_PAGES(heapsize), &heap); 101 if (status != EFI_SUCCESS) { 102 ST->ConOut->OutputString(ST->ConOut, (CHAR16 *)L"Failed to allocate memory for heap.\r\n"); 103 BS->Exit(IH, status, 0, NULL); 104 } 105 106 setheap((void *)(uintptr_t)heap, (void *)(uintptr_t)(heap + heapsize)); 107 108 /* Start tslog now that we have a heap.*/ 109 tslog_init(); 110 111 /* Use efi_exit() from here on... */ 112 113 status = OpenProtocolByHandle(IH, &image_protocol, (void**)&img); 114 if (status != EFI_SUCCESS) 115 efi_exit(status); 116 117 /* 118 * Pre-process the (optional) load options. If the option string 119 * is given as an ASCII string, we use a poor man's ASCII to 120 * Unicode-16 translation. The size of the option string as given 121 * to us includes the terminating null character. We assume the 122 * string is an ASCII string if strlen() plus the terminating 123 * '\0' is less than LoadOptionsSize. Even if all Unicode-16 124 * characters have the upper 8 bits non-zero, the terminating 125 * null character will cause a one-off. 126 * If the string is already in Unicode-16, we make a copy so that 127 * we know we can always modify the string. 128 */ 129 if (img->LoadOptionsSize > 0 && img->LoadOptions != NULL) { 130 if (img->LoadOptionsSize == strlen(img->LoadOptions) + 1) { 131 args = malloc(img->LoadOptionsSize << 1); 132 for (argc = 0; argc < (int)img->LoadOptionsSize; argc++) 133 args[argc] = ((char*)img->LoadOptions)[argc]; 134 } else { 135 args = malloc(img->LoadOptionsSize); 136 memcpy(args, img->LoadOptions, img->LoadOptionsSize); 137 } 138 } else 139 args = NULL; 140 141 /* 142 * Use a quick and dirty algorithm to build the argv vector. We 143 * first count the number of words. Then, after allocating the 144 * vector, we split the string up. We don't deal with quotes or 145 * other more advanced shell features. 146 * The EFI shell will pass the name of the image as the first 147 * word in the argument list. This does not happen if we're 148 * loaded by the boot manager. This is not so easy to figure 149 * out though. The ParentHandle is not always NULL, because 150 * there can be a function (=image) that will perform the task 151 * for the boot manager. 152 */ 153 /* Part 1: Figure out if we need to add our program name. */ 154 addprog = (args == NULL || img->ParentHandle == NULL || 155 img->FilePath == NULL) ? 1 : 0; 156 if (!addprog) { 157 addprog = 158 (DevicePathType(img->FilePath) != MEDIA_DEVICE_PATH || 159 DevicePathSubType(img->FilePath) != MEDIA_FILEPATH_DP || 160 DevicePathNodeLength(img->FilePath) <= 161 sizeof(FILEPATH_DEVICE_PATH)) ? 1 : 0; 162 if (!addprog) { 163 /* XXX todo. */ 164 } 165 } 166 /* Part 2: count words. */ 167 argc = (addprog) ? 1 : 0; 168 argp = args; 169 while (argp != NULL && *argp != 0) { 170 argp = arg_skipsep(argp); 171 if (*argp == 0) 172 break; 173 argc++; 174 argp = arg_skipword(argp); 175 } 176 /* Part 3: build vector. */ 177 argv = malloc((argc + 1) * sizeof(CHAR16*)); 178 argc = 0; 179 if (addprog) 180 argv[argc++] = (CHAR16 *)L"loader.efi"; 181 argp = args; 182 while (argp != NULL && *argp != 0) { 183 argp = arg_skipsep(argp); 184 if (*argp == 0) 185 break; 186 argv[argc++] = argp; 187 argp = arg_skipword(argp); 188 /* Terminate the words. */ 189 if (*argp != 0) 190 *argp++ = 0; 191 } 192 argv[argc] = NULL; 193 194 status = main(argc, argv); 195 efi_exit(status); 196 return (status); 197 } 198