4 * based partly on wine code
6 * Copyright (c) 2016 Alexander Graf
8 * SPDX-License-Identifier: GPL-2.0+
12 #include <efi_loader.h>
14 #include <asm/global_data.h>
16 DECLARE_GLOBAL_DATA_PTR;
18 const efi_guid_t efi_global_variable_guid = EFI_GLOBAL_VARIABLE_GUID;
19 const efi_guid_t efi_guid_device_path = DEVICE_PATH_GUID;
20 const efi_guid_t efi_guid_loaded_image = LOADED_IMAGE_GUID;
21 const efi_guid_t efi_simple_file_system_protocol_guid =
22 EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID;
23 const efi_guid_t efi_file_info_guid = EFI_FILE_INFO_GUID;
25 static efi_status_t efi_loader_relocate(const IMAGE_BASE_RELOCATION *rel,
26 unsigned long rel_size, void *efi_reloc)
28 const IMAGE_BASE_RELOCATION *end;
31 end = (const IMAGE_BASE_RELOCATION *)((const char *)rel + rel_size);
32 while (rel < end - 1 && rel->SizeOfBlock) {
33 const uint16_t *relocs = (const uint16_t *)(rel + 1);
34 i = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(uint16_t);
36 uint32_t offset = (uint32_t)(*relocs & 0xfff) +
38 int type = *relocs >> EFI_PAGE_SHIFT;
39 unsigned long delta = (unsigned long)efi_reloc;
40 uint64_t *x64 = efi_reloc + offset;
41 uint32_t *x32 = efi_reloc + offset;
42 uint16_t *x16 = efi_reloc + offset;
45 case IMAGE_REL_BASED_ABSOLUTE:
47 case IMAGE_REL_BASED_HIGH:
48 *x16 += ((uint32_t)delta) >> 16;
50 case IMAGE_REL_BASED_LOW:
51 *x16 += (uint16_t)delta;
53 case IMAGE_REL_BASED_HIGHLOW:
54 *x32 += (uint32_t)delta;
56 case IMAGE_REL_BASED_DIR64:
57 *x64 += (uint64_t)delta;
60 printf("Unknown Relocation off %x type %x\n",
62 return EFI_LOAD_ERROR;
66 rel = (const IMAGE_BASE_RELOCATION *)relocs;
71 void __weak invalidate_icache_all(void)
73 /* If the system doesn't support icache_all flush, cross our fingers */
77 * This function loads all sections from a PE binary into a newly reserved
78 * piece of memory. On successful load it then returns the entry point for
79 * the binary. Otherwise NULL.
81 void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info)
83 IMAGE_NT_HEADERS32 *nt;
84 IMAGE_DOS_HEADER *dos;
85 IMAGE_SECTION_HEADER *sections;
89 const IMAGE_BASE_RELOCATION *rel;
90 unsigned long rel_size;
91 int rel_idx = IMAGE_DIRECTORY_ENTRY_BASERELOC;
94 unsigned long virt_size = 0;
95 bool can_run_nt64 = true;
96 bool can_run_nt32 = true;
99 #if defined(CONFIG_ARM64)
100 can_run_nt32 = false;
101 #elif defined(CONFIG_ARM)
102 can_run_nt64 = false;
106 if (dos->e_magic != IMAGE_DOS_SIGNATURE) {
107 printf("%s: Invalid DOS Signature\n", __func__);
111 nt = (void *) ((char *)efi + dos->e_lfanew);
112 if (nt->Signature != IMAGE_NT_SIGNATURE) {
113 printf("%s: Invalid NT Signature\n", __func__);
117 /* Calculate upper virtual address boundary */
118 num_sections = nt->FileHeader.NumberOfSections;
119 sections = (void *)&nt->OptionalHeader +
120 nt->FileHeader.SizeOfOptionalHeader;
122 for (i = num_sections - 1; i >= 0; i--) {
123 IMAGE_SECTION_HEADER *sec = §ions[i];
124 virt_size = max_t(unsigned long, virt_size,
125 sec->VirtualAddress + sec->Misc.VirtualSize);
128 /* Read 32/64bit specific header bits */
130 (nt->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC)) {
131 IMAGE_NT_HEADERS64 *nt64 = (void *)nt;
132 IMAGE_OPTIONAL_HEADER64 *opt = &nt64->OptionalHeader;
133 image_size = opt->SizeOfImage;
134 efi_reloc = efi_alloc(virt_size, EFI_LOADER_DATA);
136 printf("%s: Could not allocate %ld bytes\n",
137 __func__, virt_size);
140 entry = efi_reloc + opt->AddressOfEntryPoint;
141 rel_size = opt->DataDirectory[rel_idx].Size;
142 rel = efi_reloc + opt->DataDirectory[rel_idx].VirtualAddress;
143 image_type = opt->Subsystem;
144 } else if (can_run_nt32 &&
145 (nt->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC)) {
146 IMAGE_OPTIONAL_HEADER32 *opt = &nt->OptionalHeader;
147 image_size = opt->SizeOfImage;
148 efi_reloc = efi_alloc(virt_size, EFI_LOADER_DATA);
150 printf("%s: Could not allocate %ld bytes\n",
151 __func__, virt_size);
154 entry = efi_reloc + opt->AddressOfEntryPoint;
155 rel_size = opt->DataDirectory[rel_idx].Size;
156 rel = efi_reloc + opt->DataDirectory[rel_idx].VirtualAddress;
157 image_type = opt->Subsystem;
159 printf("%s: Invalid optional header magic %x\n", __func__,
160 nt->OptionalHeader.Magic);
164 switch (image_type) {
165 case IMAGE_SUBSYSTEM_EFI_APPLICATION:
166 loaded_image_info->image_code_type = EFI_LOADER_CODE;
167 loaded_image_info->image_data_type = EFI_LOADER_DATA;
169 case IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER:
170 loaded_image_info->image_code_type = EFI_BOOT_SERVICES_CODE;
171 loaded_image_info->image_data_type = EFI_BOOT_SERVICES_DATA;
173 case IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER:
174 case IMAGE_SUBSYSTEM_SAL_RUNTIME_DRIVER:
175 loaded_image_info->image_code_type = EFI_RUNTIME_SERVICES_CODE;
176 loaded_image_info->image_data_type = EFI_RUNTIME_SERVICES_DATA;
179 printf("%s: invalid image type: %u\n", __func__, image_type);
183 /* Load sections into RAM */
184 for (i = num_sections - 1; i >= 0; i--) {
185 IMAGE_SECTION_HEADER *sec = §ions[i];
186 memset(efi_reloc + sec->VirtualAddress, 0,
187 sec->Misc.VirtualSize);
188 memcpy(efi_reloc + sec->VirtualAddress,
189 efi + sec->PointerToRawData,
193 /* Run through relocations */
194 if (efi_loader_relocate(rel, rel_size, efi_reloc) != EFI_SUCCESS) {
195 efi_free_pages((uintptr_t) efi_reloc,
196 (virt_size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT);
201 flush_cache((ulong)efi_reloc,
202 ALIGN(virt_size, CONFIG_SYS_CACHELINE_SIZE));
203 invalidate_icache_all();
205 /* Populate the loaded image interface bits */
206 loaded_image_info->image_base = efi;
207 loaded_image_info->image_size = image_size;