On Fri, May 06, 2022 at 09:55:59PM +0100, Nikos Nikoleris wrote: > This change adds unmodified dependencies that we need from GNU-EFI in > order to build arm64 EFI apps. > > GNU-EFI sources from https://git.code.sf.net/p/gnu-efi/code v3.0.14 > > Signed-off-by: Nikos Nikoleris <nikos.nikoleris@xxxxxxx> > --- > arm/efi/elf_aarch64_efi.lds | 63 +++++++++++++++++ > arm/efi/crt0-efi-aarch64.S | 130 ++++++++++++++++++++++++++++++++++++ > arm/efi/reloc_aarch64.c | 97 +++++++++++++++++++++++++++ > 3 files changed, 290 insertions(+) > create mode 100644 arm/efi/elf_aarch64_efi.lds > create mode 100644 arm/efi/crt0-efi-aarch64.S > create mode 100644 arm/efi/reloc_aarch64.c > > diff --git a/arm/efi/elf_aarch64_efi.lds b/arm/efi/elf_aarch64_efi.lds > new file mode 100644 > index 0000000..836d982 > --- /dev/null > +++ b/arm/efi/elf_aarch64_efi.lds > @@ -0,0 +1,63 @@ > +OUTPUT_FORMAT("elf64-littleaarch64", "elf64-littleaarch64", "elf64-littleaarch64") > +OUTPUT_ARCH(aarch64) > +ENTRY(_start) > +SECTIONS > +{ > + .text 0x0 : { > + _text = .; > + *(.text.head) > + *(.text) > + *(.text.*) > + *(.gnu.linkonce.t.*) > + *(.srodata) > + *(.rodata*) > + . = ALIGN(16); > + } > + _etext = .; > + _text_size = . - _text; > + .dynamic : { *(.dynamic) } > + .data : ALIGN(4096) > + { > + _data = .; > + *(.sdata) > + *(.data) > + *(.data1) > + *(.data.*) > + *(.got.plt) > + *(.got) > + > + /* the EFI loader doesn't seem to like a .bss section, so we stick > + it all into .data: */ > + . = ALIGN(16); > + _bss = .; > + *(.sbss) > + *(.scommon) > + *(.dynbss) > + *(.bss) > + *(COMMON) > + . = ALIGN(16); > + _bss_end = .; > + } > + > + .rela.dyn : { *(.rela.dyn) } > + .rela.plt : { *(.rela.plt) } > + .rela.got : { *(.rela.got) } > + .rela.data : { *(.rela.data) *(.rela.data*) } > + . = ALIGN(512); > + _edata = .; > + _data_size = . - _data; > + > + . = ALIGN(4096); > + .dynsym : { *(.dynsym) } > + . = ALIGN(4096); > + .dynstr : { *(.dynstr) } > + . = ALIGN(4096); > + .note.gnu.build-id : { *(.note.gnu.build-id) } > + /DISCARD/ : > + { > + *(.rel.reloc) > + *(.eh_frame) > + *(.note.GNU-stack) > + } > + .comment 0 : { *(.comment) } > +} > diff --git a/arm/efi/crt0-efi-aarch64.S b/arm/efi/crt0-efi-aarch64.S > new file mode 100644 > index 0000000..d50e78d > --- /dev/null > +++ b/arm/efi/crt0-efi-aarch64.S > @@ -0,0 +1,130 @@ > +/* > + * crt0-efi-aarch64.S - PE/COFF header for AArch64 EFI applications > + * > + * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@xxxxxxxxxx> > + * > + * 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 0xaa64 // AArch64 > + .short 2 // nr_sections > + .long 0 // TimeDateStamp > + .long 0 // PointerToSymbolTable > + .long 0 // 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 _data - _start // SizeOfCode > + .long _data_size // SizeOfInitializedData > + .long 0 // SizeOfUninitializedData > + .long _start - ImageBase // AddressOfEntryPoint > + .long _start - ImageBase // BaseOfCode > + > +extra_header_fields: > + .quad 0 // ImageBase > + .long 0x1000 // SectionAlignment > + .long 0x200 // 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: > + .ascii ".text\0\0\0" > + .long _data - _start // VirtualSize > + .long _start - ImageBase // VirtualAddress > + .long _data - _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 0x60000020 // Characteristics (section flags) > + > + .ascii ".data\0\0\0" > + .long _data_size // VirtualSize > + .long _data - ImageBase // VirtualAddress > + .long _data_size // SizeOfRawData > + .long _data - 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 0xc0000040 // Characteristics (section flags) > + > + .align 12 > +_start: > + stp x29, x30, [sp, #-32]! > + mov x29, sp > + > + stp x0, x1, [sp, #16] > + mov x2, x0 > + mov x3, x1 > + adr x0, ImageBase > + adrp x1, _DYNAMIC > + add x1, x1, #:lo12:_DYNAMIC > + bl _relocate > + cbnz x0, 0f > + > + ldp x0, x1, [sp, #16] > + bl efi_main > + > +0: ldp x29, x30, [sp], #32 > + ret > diff --git a/arm/efi/reloc_aarch64.c b/arm/efi/reloc_aarch64.c > new file mode 100644 > index 0000000..0867279 > --- /dev/null > +++ b/arm/efi/reloc_aarch64.c > @@ -0,0 +1,97 @@ > +/* reloc_aarch64.c - position independent x86 ELF shared object relocator > + Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@xxxxxxxxxx> > + Copyright (C) 1999 Hewlett-Packard Co. > + Contributed by David Mosberger <davidm@xxxxxxxxxx>. > + > + All rights reserved. > + > + Redistribution and use in source and binary forms, with or without > + modification, are permitted provided that the following conditions > + are met: > + > + * Redistributions of source code must retain the above copyright > + notice, this list of conditions and the following disclaimer. > + * Redistributions in binary form must reproduce the above > + copyright notice, this list of conditions and the following > + disclaimer in the documentation and/or other materials > + provided with the distribution. > + * Neither the name of Hewlett-Packard Co. nor the names of its > + contributors may be used to endorse or promote products derived > + from this software without specific prior written permission. > + > + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND > + CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, > + INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF > + MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE > + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS > + BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, > + OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, > + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR > + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY > + THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR > + TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF > + THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF > + SUCH DAMAGE. > +*/ > + > +#include <efi.h> > +#include <efilib.h> > + > +#include <elf.h> > + > +EFI_STATUS _relocate (long ldbase, Elf64_Dyn *dyn, > + EFI_HANDLE image EFI_UNUSED, > + EFI_SYSTEM_TABLE *systab EFI_UNUSED) > +{ > + long relsz = 0, relent = 0; > + Elf64_Rela *rel = 0; > + unsigned long *addr; > + int i; > + > + for (i = 0; dyn[i].d_tag != DT_NULL; ++i) { > + switch (dyn[i].d_tag) { > + case DT_RELA: > + rel = (Elf64_Rela*) > + ((unsigned long)dyn[i].d_un.d_ptr > + + ldbase); > + break; > + > + case DT_RELASZ: > + relsz = dyn[i].d_un.d_val; > + break; > + > + case DT_RELAENT: > + relent = dyn[i].d_un.d_val; > + break; > + > + default: > + break; > + } > + } > + > + if (!rel && relent == 0) > + return EFI_SUCCESS; > + > + if (!rel || relent == 0) > + return EFI_LOAD_ERROR; > + > + while (relsz > 0) { > + /* apply the relocs */ > + switch (ELF64_R_TYPE (rel->r_info)) { > + case R_AARCH64_NONE: > + break; > + > + case R_AARCH64_RELATIVE: > + addr = (unsigned long *) > + (ldbase + rel->r_offset); > + *addr = ldbase + rel->r_addend; > + break; > + > + default: > + break; > + } > + rel = (Elf64_Rela*) ((char *) rel + relent); > + relsz -= relent; > + } > + return EFI_SUCCESS; > +} > -- > 2.25.1 > Reviewed-by: Ricardo Koller <ricarkol@xxxxxxxxxx>
