Implement crt, reloc, linker scripts, wire things up in
Makefiles and Kconfig.
Signed-off-by: Jiaxun Yang <jiaxun.y...@flygoat.com>
---
arch/loongarch/config.mk | 4 +
arch/loongarch/lib/Makefile | 12 ++
arch/loongarch/lib/crt0_loongarch_efi.S | 182 +++++++++++++++++++++++++++++++
arch/loongarch/lib/elf_loongarch_efi.lds | 76 +++++++++++++
arch/loongarch/lib/reloc_loongarch_efi.c | 107 ++++++++++++++++++
lib/efi_loader/Kconfig | 2 +-
6 files changed, 382 insertions(+), 1 deletion(-)
diff --git a/arch/loongarch/config.mk b/arch/loongarch/config.mk
index 7c247400e361..bae4566e9b62 100644
--- a/arch/loongarch/config.mk
+++ b/arch/loongarch/config.mk
@@ -21,3 +21,7 @@ endif
PLATFORM_CPPFLAGS += -fpic
PLATFORM_RELFLAGS += -fno-common -ffunction-sections -fdata-sections
LDFLAGS_u-boot += --gc-sections -static -pie
+
+EFI_LDS := elf_loongarch_efi.lds
+EFI_CRT0 := crt0_loongarch_efi.o
+EFI_RELOC := reloc_loongarch_efi.o
diff --git a/arch/loongarch/lib/Makefile b/arch/loongarch/lib/Makefile
index e65e66357a9b..17d2b1160b41 100644
--- a/arch/loongarch/lib/Makefile
+++ b/arch/loongarch/lib/Makefile
@@ -12,3 +12,15 @@ ifeq ($(CONFIG_$(SPL_)SYSRESET),)
obj-y += reset.o
endif
obj-y += setjmp.o
+
+# For building EFI apps
+CFLAGS_NON_EFI := -fstack-protector-strong
+CFLAGS_$(EFI_CRT0) := $(CFLAGS_EFI)
+CFLAGS_REMOVE_$(EFI_CRT0) := $(CFLAGS_NON_EFI)
+
+CFLAGS_$(EFI_RELOC) := $(CFLAGS_EFI)
+CFLAGS_REMOVE_$(EFI_RELOC) := $(CFLAGS_NON_EFI)
+
+extra-$(CONFIG_CMD_BOOTEFI_HELLO_COMPILE) += $(EFI_CRT0) $(EFI_RELOC)
+extra-$(CONFIG_CMD_BOOTEFI_SELFTEST) += $(EFI_CRT0) $(EFI_RELOC)
+extra-$(CONFIG_EFI) += $(EFI_CRT0) $(EFI_RELOC)
diff --git a/arch/loongarch/lib/crt0_loongarch_efi.S
b/arch/loongarch/lib/crt0_loongarch_efi.S
new file mode 100644
index 000000000000..5be47045ad8a
--- /dev/null
+++ b/arch/loongarch/lib/crt0_loongarch_efi.S
@@ -0,0 +1,182 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * crt0-efi-loongarch.S - PE/COFF header for LoongArch EFI applications
+ *
+ * Copright (C) 2024 Jiaxun Yang <jiaxun.y...@flygoat.com>
+ */
+
+#include <asm-generic/pe.h>
+#include <asm/asm.h>
+
+#ifdef __loongarch64
+#define PE_MACHINE IMAGE_FILE_MACHINE_LOONGARCH64
+#define PE_MAGIC IMAGE_NT_OPTIONAL_HDR64_MAGIC
+#define IMG_CHARACTERISTICS \
+ (IMAGE_FILE_EXECUTABLE_IMAGE | \
+ IMAGE_FILE_LINE_NUMS_STRIPPED | \
+ IMAGE_FILE_LOCAL_SYMS_STRIPPED | \
+ IMAGE_FILE_LARGE_ADDRESS_AWARE | \
+ IMAGE_FILE_DEBUG_STRIPPED)
+#else
+#define PE_MACHINE IMAGE_FILE_MACHINE_LOONGARCH32
+#define PE_MAGIC IMAGE_NT_OPTIONAL_HDR32_MAGIC
+#define IMG_CHARACTERISTICS \
+ (IMAGE_FILE_EXECUTABLE_IMAGE | \
+ IMAGE_FILE_LINE_NUMS_STRIPPED | \
+ IMAGE_FILE_LOCAL_SYMS_STRIPPED | \
+ IMAGE_FILE_DEBUG_STRIPPED)
+#endif
+
+ .section .text.head
+
+ /*
+ * Magic "MZ" signature for PE/COFF
+ */
+ .globl ImageBase
+ImageBase:
+ .short IMAGE_DOS_SIGNATURE /* 'MZ' */
+ .skip 58
+ .long pe_header - ImageBase /* Offset to the PE header */
+pe_header:
+ .long IMAGE_NT_SIGNATURE /* 'PE' */
+coff_header:
+ .short PE_MACHINE /* LoongArch 64/32-bit */
+ .short 3 /* nr_sections */
+ .long 0 /* TimeDateStamp */
+ .long 0 /* PointerToSymbolTable */
+ .long 0 /* NumberOfSymbols */
+ .short section_table - optional_header /* SizeOfOptionalHeader */
+ .short IMG_CHARACTERISTICS /* Characteristics */
+optional_header:
+ .short PE_MAGIC /* 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 */
+#ifndef __loongarch64
+ .long 0 /* BaseOfData */
+#endif
+
+extra_header_fields:
+ LONG 0
+ .long 0x200 /* SectionAlignment */
+ .long 0x200 /* FileAlignment */
+ .short 0 /* MajorOperatingSystemVersion
*/
+ .short 0 /* MinorOperatingSystemVersion
*/
+ .short 1 /* 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 IMAGE_SUBSYSTEM_EFI_APPLICATION /* Subsystem */
+#if CONFIG_VENDOR_EFI
+ .short 0 /* DllCharacteristics */
+#else
+ .short IMAGE_DLLCHARACTERISTICS_NX_COMPAT
+#endif
+ LONG 0 /* SizeOfStackReserve */
+ LONG 0 /* SizeOfStackCommit */
+ LONG 0 /* SizeOfHeapReserve */
+ LONG 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 _etext - _start /* VirtualSize */
+ .long _start - ImageBase /* VirtualAddress */
+ .long _etext - _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) */
+ /* Characteristics (section flags) */
+ .long (IMAGE_SCN_MEM_READ | \
+ IMAGE_SCN_MEM_EXECUTE | \
+ IMAGE_SCN_CNT_CODE)
+
+ .ascii ".data"
+ .byte 0
+ .byte 0
+ .byte 0 /* end of 0 padding of section name */
+ .long _edata - _data /* VirtualSize */
+ .long _data - ImageBase /* VirtualAddress */
+ .long _edata - _data /* SizeOfRawData */
+ .long _data - ImageBase /* PointerToRawData */
+ .long 0 /* PointerToRelocations */
+ .long 0 /* PointerToLineNumbers */
+ .short 0 /* NumberOfRelocations */
+ .short 0 /* NumberOfLineNumbers */
+ /* Characteristics (section flags) */
+ .long (IMAGE_SCN_MEM_WRITE | \
+ IMAGE_SCN_MEM_READ | \
+ IMAGE_SCN_CNT_INITIALIZED_DATA)
+
+ .align 12
+ .globl _start
+ .type _start, @function
+_start:
+ PTR_ADDI sp, sp, -(3 * LONGSIZE)
+ LONG_S ra, sp, 0
+ LONG_S a0, sp, (1 * LONGSIZE)
+ LONG_S a1, sp, (2 * LONGSIZE)
+
+ move a2, a0 /* a2: ImageHandle */
+ move a3, a1 /* a3: SystemTable */
+ la.local a0, ImageBase /* a0: ImageBase */
+ la.local a1, _DYNAMIC /* a1: DynamicSection */
+ bl _relocate
+ bnez a0, 0f
+
+ LONG_L a0, sp, (1 * LONGSIZE)
+ LONG_L a1, sp, (2 * LONGSIZE)
+ bl efi_main
+
+0: LONG_L ra, sp, 0
+ PTR_ADDI sp, sp, (3 * LONGSIZE)
+ jr ra
+ .end _start
diff --git a/arch/loongarch/lib/elf_loongarch_efi.lds
b/arch/loongarch/lib/elf_loongarch_efi.lds
new file mode 100644
index 000000000000..050e5a52a0b3
--- /dev/null
+++ b/arch/loongarch/lib/elf_loongarch_efi.lds
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * U-Boot LoongArch
+ *
+ * Modified from arch/riscv/lib/elf_riscv64_efi.lds
+ */
+
+OUTPUT_ARCH(loongarch)
+
+PHDRS
+{
+ data PT_LOAD FLAGS(3); /* SHF_WRITE | SHF_ALLOC */
+}
+
+ENTRY(_start)
+SECTIONS
+{
+ .text 0x0 : {
+ _text = .;
+ *(.text.head)
+ *(.text)
+ *(.text.*)
+ *(.gnu.linkonce.t.*)
+ *(.srodata)
+ *(.rodata*)
+ . = ALIGN(16);
+ *(.dynamic);
+ . = ALIGN(512);
+ }
+ .rela.dyn : { *(.rela.dyn) }
+ .rela.plt : { *(.rela.plt) }
+ .rela.got : { *(.rela.got) }
+ .rela.data : { *(.rela.data) *(.rela.data*) }
+ _etext = .;
+ _text_size = . - _text;
+ . = ALIGN(4096);
+ .data : {
+ _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)
+ *(.bss.*)
+ *(COMMON)
+ . = ALIGN(512);
+ _bss_end = .;
+ _edata = .;
+ } :data
+ _data_size = _edata - _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/arch/loongarch/lib/reloc_loongarch_efi.c
b/arch/loongarch/lib/reloc_loongarch_efi.c
new file mode 100644
index 000000000000..32a7d792103d
--- /dev/null
+++ b/arch/loongarch/lib/reloc_loongarch_efi.c
@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* reloc_loongarch.c - position independent ELF shared object relocator
+ Copyright (C) 2018 Alexander Graf <ag...@suse.de>
+ Copyright (C) 2014 Linaro Ltd. <ard.biesheu...@linaro.org>
+ Copyright (C) 1999 Hewlett-Packard Co.
+ Contributed by David Mosberger <dav...@hpl.hp.com>.
+
+ 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 <elf.h>
+
+#ifdef __loongarch64
+#define Elf_Dyn Elf64_Dyn
+#define Elf_Rela Elf64_Rela
+#define ELF_R_TYPE ELF64_R_TYPE
+#else
+#define Elf_Dyn Elf32_Dyn
+#define Elf_Rela Elf32_Rela
+#define ELF_R_TYPE ELF32_R_TYPE
+#endif
+
+efi_status_t EFIAPI _relocate(long ldbase, Elf_Dyn *dyn)
+{
+ long relsz = 0, relent = 0;
+ Elf_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 = (Elf_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;
+ case DT_PLTGOT:
+ addr = (unsigned long *)
+ ((unsigned long)dyn[i].d_un.d_ptr
+ + ldbase);
+ 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 (ELF_R_TYPE(rel->r_info)) {
+ case R_LARCH_NONE:
+ break;
+ case R_LARCH_RELATIVE:
+ addr = (unsigned long *)
+ (ldbase + rel->r_offset);
+ *addr += ldbase;
+ break;
+ default:
+ break;
+ }
+ rel = (Elf_Rela *)((char *)rel + relent);
+ relsz -= relent;
+ }
+ return EFI_SUCCESS;
+}
+
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index 430bb7f0f7dc..1d82a062a215 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -5,7 +5,7 @@ config EFI_LOADER
SYS_CPU = arm1176 || \
SYS_CPU = armv7 || \
SYS_CPU = armv8) || \
- X86 || RISCV || SANDBOX)
+ X86 || RISCV || LOONGARCH || SANDBOX)
# We need EFI_STUB_64BIT to be set on x86_64 with EFI_STUB
depends on !EFI_STUB || !X86_64 || EFI_STUB_64BIT
# We need EFI_STUB_32BIT to be set on x86_32 with EFI_STUB
--
2.43.0
