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10#include <common.h>
11#include <efi_loader.h>
12#include <pe.h>
13
14const efi_guid_t efi_global_variable_guid = EFI_GLOBAL_VARIABLE_GUID;
15const efi_guid_t efi_guid_device_path = DEVICE_PATH_GUID;
16const efi_guid_t efi_guid_loaded_image = LOADED_IMAGE_GUID;
17const efi_guid_t efi_simple_file_system_protocol_guid =
18 EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID;
19const efi_guid_t efi_file_info_guid = EFI_FILE_INFO_GUID;
20
21static int machines[] = {
22#if defined(__aarch64__)
23 IMAGE_FILE_MACHINE_ARM64,
24#elif defined(__arm__)
25 IMAGE_FILE_MACHINE_ARM,
26 IMAGE_FILE_MACHINE_THUMB,
27 IMAGE_FILE_MACHINE_ARMNT,
28#endif
29
30#if defined(__x86_64__)
31 IMAGE_FILE_MACHINE_AMD64,
32#elif defined(__i386__)
33 IMAGE_FILE_MACHINE_I386,
34#endif
35
36#if defined(__riscv) && (__riscv_xlen == 32)
37 IMAGE_FILE_MACHINE_RISCV32,
38#endif
39
40#if defined(__riscv) && (__riscv_xlen == 64)
41 IMAGE_FILE_MACHINE_RISCV64,
42#endif
43 0 };
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55
56static efi_status_t efi_print_image_info(struct efi_loaded_image_obj *obj,
57 struct efi_loaded_image *image,
58 void *pc)
59{
60 printf("UEFI image");
61 printf(" [0x%p:0x%p]",
62 obj->reloc_base, obj->reloc_base + obj->reloc_size - 1);
63 if (pc && pc >= obj->reloc_base &&
64 pc < obj->reloc_base + obj->reloc_size)
65 printf(" pc=0x%zx", pc - obj->reloc_base);
66 if (image->file_path)
67 printf(" '%pD'", image->file_path);
68 printf("\n");
69 return EFI_SUCCESS;
70}
71
72
73
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75
76
77void efi_print_image_infos(void *pc)
78{
79 struct efi_object *efiobj;
80 struct efi_handler *handler;
81
82 list_for_each_entry(efiobj, &efi_obj_list, link) {
83 list_for_each_entry(handler, &efiobj->protocols, link) {
84 if (!guidcmp(handler->guid, &efi_guid_loaded_image)) {
85 efi_print_image_info(
86 (struct efi_loaded_image_obj *)efiobj,
87 handler->protocol_interface, pc);
88 }
89 }
90 }
91}
92
93static efi_status_t efi_loader_relocate(const IMAGE_BASE_RELOCATION *rel,
94 unsigned long rel_size, void *efi_reloc,
95 unsigned long pref_address)
96{
97 unsigned long delta = (unsigned long)efi_reloc - pref_address;
98 const IMAGE_BASE_RELOCATION *end;
99 int i;
100
101 if (delta == 0)
102 return EFI_SUCCESS;
103
104 end = (const IMAGE_BASE_RELOCATION *)((const char *)rel + rel_size);
105 while (rel < end - 1 && rel->SizeOfBlock) {
106 const uint16_t *relocs = (const uint16_t *)(rel + 1);
107 i = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(uint16_t);
108 while (i--) {
109 uint32_t offset = (uint32_t)(*relocs & 0xfff) +
110 rel->VirtualAddress;
111 int type = *relocs >> EFI_PAGE_SHIFT;
112 uint64_t *x64 = efi_reloc + offset;
113 uint32_t *x32 = efi_reloc + offset;
114 uint16_t *x16 = efi_reloc + offset;
115
116 switch (type) {
117 case IMAGE_REL_BASED_ABSOLUTE:
118 break;
119 case IMAGE_REL_BASED_HIGH:
120 *x16 += ((uint32_t)delta) >> 16;
121 break;
122 case IMAGE_REL_BASED_LOW:
123 *x16 += (uint16_t)delta;
124 break;
125 case IMAGE_REL_BASED_HIGHLOW:
126 *x32 += (uint32_t)delta;
127 break;
128 case IMAGE_REL_BASED_DIR64:
129 *x64 += (uint64_t)delta;
130 break;
131#ifdef __riscv
132 case IMAGE_REL_BASED_RISCV_HI20:
133 *x32 = ((*x32 & 0xfffff000) + (uint32_t)delta) |
134 (*x32 & 0x00000fff);
135 break;
136 case IMAGE_REL_BASED_RISCV_LOW12I:
137 case IMAGE_REL_BASED_RISCV_LOW12S:
138
139 if (delta & 0xfff) {
140 printf("Unsupported reloc offset\n");
141 return EFI_LOAD_ERROR;
142 }
143 break;
144#endif
145 default:
146 printf("Unknown Relocation off %x type %x\n",
147 offset, type);
148 return EFI_LOAD_ERROR;
149 }
150 relocs++;
151 }
152 rel = (const IMAGE_BASE_RELOCATION *)relocs;
153 }
154 return EFI_SUCCESS;
155}
156
157void __weak invalidate_icache_all(void)
158{
159
160}
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168
169static void efi_set_code_and_data_type(
170 struct efi_loaded_image *loaded_image_info,
171 uint16_t image_type)
172{
173 switch (image_type) {
174 case IMAGE_SUBSYSTEM_EFI_APPLICATION:
175 loaded_image_info->image_code_type = EFI_LOADER_CODE;
176 loaded_image_info->image_data_type = EFI_LOADER_DATA;
177 break;
178 case IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER:
179 loaded_image_info->image_code_type = EFI_BOOT_SERVICES_CODE;
180 loaded_image_info->image_data_type = EFI_BOOT_SERVICES_DATA;
181 break;
182 case IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER:
183 case IMAGE_SUBSYSTEM_EFI_ROM:
184 loaded_image_info->image_code_type = EFI_RUNTIME_SERVICES_CODE;
185 loaded_image_info->image_data_type = EFI_RUNTIME_SERVICES_DATA;
186 break;
187 default:
188 printf("%s: invalid image type: %u\n", __func__, image_type);
189
190 loaded_image_info->image_code_type = EFI_LOADER_CODE;
191 loaded_image_info->image_data_type = EFI_LOADER_DATA;
192 break;
193 }
194}
195
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197
198
199
200
201void *efi_load_pe(struct efi_loaded_image_obj *handle, void *efi,
202 struct efi_loaded_image *loaded_image_info)
203{
204 IMAGE_NT_HEADERS32 *nt;
205 IMAGE_DOS_HEADER *dos;
206 IMAGE_SECTION_HEADER *sections;
207 int num_sections;
208 void *efi_reloc;
209 int i;
210 const IMAGE_BASE_RELOCATION *rel;
211 unsigned long rel_size;
212 int rel_idx = IMAGE_DIRECTORY_ENTRY_BASERELOC;
213 void *entry;
214 uint64_t image_base;
215 uint64_t image_size;
216 unsigned long virt_size = 0;
217 int supported = 0;
218
219 dos = efi;
220 if (dos->e_magic != IMAGE_DOS_SIGNATURE) {
221 printf("%s: Invalid DOS Signature\n", __func__);
222 return NULL;
223 }
224
225 nt = (void *) ((char *)efi + dos->e_lfanew);
226 if (nt->Signature != IMAGE_NT_SIGNATURE) {
227 printf("%s: Invalid NT Signature\n", __func__);
228 return NULL;
229 }
230
231 for (i = 0; machines[i]; i++)
232 if (machines[i] == nt->FileHeader.Machine) {
233 supported = 1;
234 break;
235 }
236
237 if (!supported) {
238 printf("%s: Machine type 0x%04x is not supported\n",
239 __func__, nt->FileHeader.Machine);
240 return NULL;
241 }
242
243
244 num_sections = nt->FileHeader.NumberOfSections;
245 sections = (void *)&nt->OptionalHeader +
246 nt->FileHeader.SizeOfOptionalHeader;
247
248 for (i = num_sections - 1; i >= 0; i--) {
249 IMAGE_SECTION_HEADER *sec = §ions[i];
250 virt_size = max_t(unsigned long, virt_size,
251 sec->VirtualAddress + sec->Misc.VirtualSize);
252 }
253
254
255 if (nt->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
256 IMAGE_NT_HEADERS64 *nt64 = (void *)nt;
257 IMAGE_OPTIONAL_HEADER64 *opt = &nt64->OptionalHeader;
258 image_base = opt->ImageBase;
259 image_size = opt->SizeOfImage;
260 efi_set_code_and_data_type(loaded_image_info, opt->Subsystem);
261 efi_reloc = efi_alloc(virt_size,
262 loaded_image_info->image_code_type);
263 if (!efi_reloc) {
264 printf("%s: Could not allocate %lu bytes\n",
265 __func__, virt_size);
266 return NULL;
267 }
268 entry = efi_reloc + opt->AddressOfEntryPoint;
269 rel_size = opt->DataDirectory[rel_idx].Size;
270 rel = efi_reloc + opt->DataDirectory[rel_idx].VirtualAddress;
271 virt_size = ALIGN(virt_size, opt->SectionAlignment);
272 } else if (nt->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
273 IMAGE_OPTIONAL_HEADER32 *opt = &nt->OptionalHeader;
274 image_base = opt->ImageBase;
275 image_size = opt->SizeOfImage;
276 efi_set_code_and_data_type(loaded_image_info, opt->Subsystem);
277 efi_reloc = efi_alloc(virt_size,
278 loaded_image_info->image_code_type);
279 if (!efi_reloc) {
280 printf("%s: Could not allocate %lu bytes\n",
281 __func__, virt_size);
282 return NULL;
283 }
284 entry = efi_reloc + opt->AddressOfEntryPoint;
285 rel_size = opt->DataDirectory[rel_idx].Size;
286 rel = efi_reloc + opt->DataDirectory[rel_idx].VirtualAddress;
287 virt_size = ALIGN(virt_size, opt->SectionAlignment);
288 } else {
289 printf("%s: Invalid optional header magic %x\n", __func__,
290 nt->OptionalHeader.Magic);
291 return NULL;
292 }
293
294
295 for (i = num_sections - 1; i >= 0; i--) {
296 IMAGE_SECTION_HEADER *sec = §ions[i];
297 memset(efi_reloc + sec->VirtualAddress, 0,
298 sec->Misc.VirtualSize);
299 memcpy(efi_reloc + sec->VirtualAddress,
300 efi + sec->PointerToRawData,
301 sec->SizeOfRawData);
302 }
303
304
305 if (efi_loader_relocate(rel, rel_size, efi_reloc,
306 (unsigned long)image_base) != EFI_SUCCESS) {
307 efi_free_pages((uintptr_t) efi_reloc,
308 (virt_size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT);
309 return NULL;
310 }
311
312
313 flush_cache((ulong)efi_reloc,
314 ALIGN(virt_size, EFI_CACHELINE_SIZE));
315 invalidate_icache_all();
316
317
318 loaded_image_info->image_base = efi;
319 loaded_image_info->image_size = image_size;
320 handle->reloc_base = efi_reloc;
321 handle->reloc_size = virt_size;
322
323 return entry;
324}
325
