diff options
Diffstat (limited to 'arch/arm64/kernel/head.S')
| -rw-r--r-- | arch/arm64/kernel/head.S | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index 0fd565000772..738291b5be29 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S | |||
| @@ -108,8 +108,18 @@ | |||
| 108 | /* | 108 | /* |
| 109 | * DO NOT MODIFY. Image header expected by Linux boot-loaders. | 109 | * DO NOT MODIFY. Image header expected by Linux boot-loaders. |
| 110 | */ | 110 | */ |
| 111 | #ifdef CONFIG_EFI | ||
| 112 | efi_head: | ||
| 113 | /* | ||
| 114 | * This add instruction has no meaningful effect except that | ||
| 115 | * its opcode forms the magic "MZ" signature required by UEFI. | ||
| 116 | */ | ||
| 117 | add x13, x18, #0x16 | ||
| 118 | b stext | ||
| 119 | #else | ||
| 111 | b stext // branch to kernel start, magic | 120 | b stext // branch to kernel start, magic |
| 112 | .long 0 // reserved | 121 | .long 0 // reserved |
| 122 | #endif | ||
| 113 | .quad TEXT_OFFSET // Image load offset from start of RAM | 123 | .quad TEXT_OFFSET // Image load offset from start of RAM |
| 114 | .quad 0 // reserved | 124 | .quad 0 // reserved |
| 115 | .quad 0 // reserved | 125 | .quad 0 // reserved |
| @@ -120,7 +130,109 @@ | |||
| 120 | .byte 0x52 | 130 | .byte 0x52 |
| 121 | .byte 0x4d | 131 | .byte 0x4d |
| 122 | .byte 0x64 | 132 | .byte 0x64 |
| 133 | #ifdef CONFIG_EFI | ||
| 134 | .long pe_header - efi_head // Offset to the PE header. | ||
| 135 | #else | ||
| 123 | .word 0 // reserved | 136 | .word 0 // reserved |
| 137 | #endif | ||
| 138 | |||
| 139 | #ifdef CONFIG_EFI | ||
| 140 | .align 3 | ||
| 141 | pe_header: | ||
| 142 | .ascii "PE" | ||
| 143 | .short 0 | ||
| 144 | coff_header: | ||
| 145 | .short 0xaa64 // AArch64 | ||
| 146 | .short 2 // nr_sections | ||
| 147 | .long 0 // TimeDateStamp | ||
| 148 | .long 0 // PointerToSymbolTable | ||
| 149 | .long 1 // NumberOfSymbols | ||
| 150 | .short section_table - optional_header // SizeOfOptionalHeader | ||
| 151 | .short 0x206 // Characteristics. | ||
| 152 | // IMAGE_FILE_DEBUG_STRIPPED | | ||
| 153 | // IMAGE_FILE_EXECUTABLE_IMAGE | | ||
| 154 | // IMAGE_FILE_LINE_NUMS_STRIPPED | ||
| 155 | optional_header: | ||
| 156 | .short 0x20b // PE32+ format | ||
| 157 | .byte 0x02 // MajorLinkerVersion | ||
| 158 | .byte 0x14 // MinorLinkerVersion | ||
| 159 | .long _edata - stext // SizeOfCode | ||
| 160 | .long 0 // SizeOfInitializedData | ||
| 161 | .long 0 // SizeOfUninitializedData | ||
| 162 | .long efi_stub_entry - efi_head // AddressOfEntryPoint | ||
| 163 | .long stext - efi_head // BaseOfCode | ||
| 164 | |||
| 165 | extra_header_fields: | ||
| 166 | .quad 0 // ImageBase | ||
| 167 | .long 0x20 // SectionAlignment | ||
| 168 | .long 0x8 // FileAlignment | ||
| 169 | .short 0 // MajorOperatingSystemVersion | ||
| 170 | .short 0 // MinorOperatingSystemVersion | ||
| 171 | .short 0 // MajorImageVersion | ||
| 172 | .short 0 // MinorImageVersion | ||
| 173 | .short 0 // MajorSubsystemVersion | ||
| 174 | .short 0 // MinorSubsystemVersion | ||
| 175 | .long 0 // Win32VersionValue | ||
| 176 | |||
| 177 | .long _edata - efi_head // SizeOfImage | ||
| 178 | |||
| 179 | // Everything before the kernel image is considered part of the header | ||
| 180 | .long stext - efi_head // SizeOfHeaders | ||
| 181 | .long 0 // CheckSum | ||
| 182 | .short 0xa // Subsystem (EFI application) | ||
| 183 | .short 0 // DllCharacteristics | ||
| 184 | .quad 0 // SizeOfStackReserve | ||
| 185 | .quad 0 // SizeOfStackCommit | ||
| 186 | .quad 0 // SizeOfHeapReserve | ||
| 187 | .quad 0 // SizeOfHeapCommit | ||
| 188 | .long 0 // LoaderFlags | ||
| 189 | .long 0x6 // NumberOfRvaAndSizes | ||
| 190 | |||
| 191 | .quad 0 // ExportTable | ||
| 192 | .quad 0 // ImportTable | ||
| 193 | .quad 0 // ResourceTable | ||
| 194 | .quad 0 // ExceptionTable | ||
| 195 | .quad 0 // CertificationTable | ||
| 196 | .quad 0 // BaseRelocationTable | ||
| 197 | |||
| 198 | // Section table | ||
| 199 | section_table: | ||
| 200 | |||
| 201 | /* | ||
| 202 | * The EFI application loader requires a relocation section | ||
| 203 | * because EFI applications must be relocatable. This is a | ||
| 204 | * dummy section as far as we are concerned. | ||
| 205 | */ | ||
| 206 | .ascii ".reloc" | ||
| 207 | .byte 0 | ||
| 208 | .byte 0 // end of 0 padding of section name | ||
| 209 | .long 0 | ||
| 210 | .long 0 | ||
| 211 | .long 0 // SizeOfRawData | ||
| 212 | .long 0 // PointerToRawData | ||
| 213 | .long 0 // PointerToRelocations | ||
| 214 | .long 0 // PointerToLineNumbers | ||
| 215 | .short 0 // NumberOfRelocations | ||
| 216 | .short 0 // NumberOfLineNumbers | ||
| 217 | .long 0x42100040 // Characteristics (section flags) | ||
| 218 | |||
| 219 | |||
| 220 | .ascii ".text" | ||
| 221 | .byte 0 | ||
| 222 | .byte 0 | ||
| 223 | .byte 0 // end of 0 padding of section name | ||
| 224 | .long _edata - stext // VirtualSize | ||
| 225 | .long stext - efi_head // VirtualAddress | ||
| 226 | .long _edata - stext // SizeOfRawData | ||
| 227 | .long stext - efi_head // PointerToRawData | ||
| 228 | |||
| 229 | .long 0 // PointerToRelocations (0 for executables) | ||
| 230 | .long 0 // PointerToLineNumbers (0 for executables) | ||
| 231 | .short 0 // NumberOfRelocations (0 for executables) | ||
| 232 | .short 0 // NumberOfLineNumbers (0 for executables) | ||
| 233 | .long 0xe0500020 // Characteristics (section flags) | ||
| 234 | .align 5 | ||
| 235 | #endif | ||
| 124 | 236 | ||
| 125 | ENTRY(stext) | 237 | ENTRY(stext) |
| 126 | mov x21, x0 // x21=FDT | 238 | mov x21, x0 // x21=FDT |