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Diffstat (limited to 'gnu-efi/gnuefi/crt0-efi-mips64el.S')
| -rw-r--r-- | gnu-efi/gnuefi/crt0-efi-mips64el.S | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/gnu-efi/gnuefi/crt0-efi-mips64el.S b/gnu-efi/gnuefi/crt0-efi-mips64el.S new file mode 100644 index 00000000..6a62aca9 --- /dev/null +++ b/gnu-efi/gnuefi/crt0-efi-mips64el.S @@ -0,0 +1,188 @@ +/* + * crt0-efi-mips64el.S - PE/COFF header for MIPS64 EFI applications + * + * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org> + * Copright (C) 2017 Heiher <r@hev.cc> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice and this list of conditions, without modification. + * 2. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License as published by the Free Software Foundation; + * either version 2 of the License, or (at your option) any later version. + */ + + .section .text.head + + /* + * Magic "MZ" signature for PE/COFF + */ + .globl ImageBase +ImageBase: + .ascii "MZ" + .skip 58 // 'MZ' + pad + offset == 64 + .long pe_header - ImageBase // Offset to the PE header. +pe_header: + .ascii "PE" + .short 0 +coff_header: + .short 0x166 // MIPS little endian + .short 2 // nr_sections + .long 0 // TimeDateStamp + .long 0 // PointerToSymbolTable + .long 1 // NumberOfSymbols + .short section_table - optional_header // SizeOfOptionalHeader + .short 0x206 // Characteristics. + // IMAGE_FILE_DEBUG_STRIPPED | + // IMAGE_FILE_EXECUTABLE_IMAGE | + // IMAGE_FILE_LINE_NUMS_STRIPPED +optional_header: + .short 0x20b // PE32+ format + .byte 0x02 // MajorLinkerVersion + .byte 0x14 // MinorLinkerVersion + .long _edata - _start // SizeOfCode + .long 0 // SizeOfInitializedData + .long 0 // SizeOfUninitializedData + .long _start - ImageBase // AddressOfEntryPoint + .long _start - ImageBase // BaseOfCode + +extra_header_fields: + .quad 0 // ImageBase + .long 0x20 // SectionAlignment + .long 0x8 // FileAlignment + .short 0 // MajorOperatingSystemVersion + .short 0 // MinorOperatingSystemVersion + .short 0 // MajorImageVersion + .short 0 // MinorImageVersion + .short 0 // MajorSubsystemVersion + .short 0 // MinorSubsystemVersion + .long 0 // Win32VersionValue + + .long _edata - ImageBase // SizeOfImage + + // Everything before the kernel image is considered part of the header + .long _start - ImageBase // SizeOfHeaders + .long 0 // CheckSum + .short EFI_SUBSYSTEM // Subsystem + .short 0 // DllCharacteristics + .quad 0 // SizeOfStackReserve + .quad 0 // SizeOfStackCommit + .quad 0 // SizeOfHeapReserve + .quad 0 // SizeOfHeapCommit + .long 0 // LoaderFlags + .long 0x6 // NumberOfRvaAndSizes + + .quad 0 // ExportTable + .quad 0 // ImportTable + .quad 0 // ResourceTable + .quad 0 // ExceptionTable + .quad 0 // CertificationTable + .quad 0 // BaseRelocationTable + + // Section table +section_table: + + /* + * The EFI application loader requires a relocation section + * because EFI applications must be relocatable. This is a + * dummy section as far as we are concerned. + */ + .ascii ".reloc" + .byte 0 + .byte 0 // end of 0 padding of section name + .long 0 + .long 0 + .long 0 // SizeOfRawData + .long 0 // PointerToRawData + .long 0 // PointerToRelocations + .long 0 // PointerToLineNumbers + .short 0 // NumberOfRelocations + .short 0 // NumberOfLineNumbers + .long 0x42100040 // Characteristics (section flags) + + + .ascii ".text" + .byte 0 + .byte 0 + .byte 0 // end of 0 padding of section name + .long _edata - _start // VirtualSize + .long _start - ImageBase // VirtualAddress + .long _edata - _start // SizeOfRawData + .long _start - ImageBase // PointerToRawData + + .long 0 // PointerToRelocations (0 for executables) + .long 0 // PointerToLineNumbers (0 for executables) + .short 0 // NumberOfRelocations (0 for executables) + .short 0 // NumberOfLineNumbers (0 for executables) + .long 0xe0500020 // Characteristics (section flags) + + .set push + .set noreorder + .align 4 + + .globl _start + .ent _start + .type _start, @function +_start: + daddiu $sp, -32 + sd $ra, ($sp) + + // Get pc & gp + .align 3 + bal 1f + sd $gp, 8($sp) +_pc: + .dword _gp + .dword _DYNAMIC + .dword _relocate +1: + // pc in ra + ld $gp, ($ra) + dli $t0, _pc + dsubu $gp, $t0 + daddu $gp, $ra + + sd $a0, 16($sp) + sd $a1, 24($sp) + + // a2: ImageHandle + move $a2, $a0 + // a3: SystemTable + move $a3, $a1 + // a0: ImageBase + dli $t1, ImageBase - _pc + daddu $a0, $ra, $t1 + // a1: DynamicSection + ld $t1, 8($ra) + dsubu $t1, $t0 + daddu $a1, $ra, $t1 + // call _relocate + ld $t1, 16($ra) + dsubu $t1, $t0 + daddu $t9, $ra, $t1 + jalr $t9 + nop + bnez $v0, 1b + nop + + // a0: ImageHandle + ld $a0, 16($sp) + // call efi_main + dla $t9, efi_main + jalr $t9 + // a1: SystemTable + ld $a1, 24($sp) + +1: + ld $gp, 8($sp) + ld $ra, ($sp) + jr $ra + daddiu $sp, 32 + .end _start + + .set pop |