riscv: Add EFI application infrastructure
authorAlexander Graf <agraf@suse.de>
Mon, 23 Apr 2018 05:59:45 +0000 (07:59 +0200)
committerAndes <uboot@andestech.com>
Tue, 29 May 2018 06:43:12 +0000 (14:43 +0800)
The hello world binary and a few selftests require to build EFI target
binaries, not just the EFI host environment.

This patch adds all required files to generate an EFI binary for
RISC-V.

Signed-off-by: Alexander Graf <agraf@suse.de>
arch/riscv/config.mk
arch/riscv/lib/Makefile
arch/riscv/lib/crt0_riscv_efi.S [new file with mode: 0644]
arch/riscv/lib/elf_riscv32_efi.lds [new file with mode: 0644]
arch/riscv/lib/elf_riscv64_efi.lds [new file with mode: 0644]
arch/riscv/lib/reloc_riscv_efi.c [new file with mode: 0644]

index f65ed8725df8768449ecd02de22cfb3abd938e73..219e66683d2f7c82c8b5f3ddf19ad5ba264a0fbc 100644 (file)
@@ -19,10 +19,12 @@ endif
 
 ifdef CONFIG_32BIT
 PLATFORM_LDFLAGS       += -m $(32bit-emul)
+EFI_LDS                        := elf_riscv32_efi.lds
 endif
 
 ifdef CONFIG_64BIT
 PLATFORM_LDFLAGS       += -m $(64bit-emul)
+EFI_LDS                        := elf_riscv64_efi.lds
 endif
 
 CONFIG_STANDALONE_LOAD_ADDR = 0x00000000 \
@@ -31,3 +33,6 @@ CONFIG_STANDALONE_LOAD_ADDR = 0x00000000 \
 PLATFORM_CPPFLAGS      += -ffixed-gp -fpic
 PLATFORM_RELFLAGS += -fno-strict-aliasing -fno-common -gdwarf-2 -ffunction-sections
 LDFLAGS_u-boot += --gc-sections -static -pie
+
+EFI_CRT0               := crt0_riscv_efi.o
+EFI_RELOC              := reloc_riscv_efi.o
index 2eafd71a6709a8d60fe90328be98d6453944fccb..cc562f935a7ac1038d948cf4b24f62aebae64f1a 100644 (file)
@@ -11,3 +11,14 @@ obj-$(CONFIG_CMD_GO) += boot.o
 obj-y  += cache.o
 obj-y  += interrupts.o
 obj-y   += setjmp.o
+
+# For building EFI apps
+CFLAGS_$(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/riscv/lib/crt0_riscv_efi.S b/arch/riscv/lib/crt0_riscv_efi.S
new file mode 100644 (file)
index 0000000..498870e
--- /dev/null
@@ -0,0 +1,152 @@
+/*
+ * crt0-efi-riscv.S - PE/COFF header for RISC-V EFI applications
+ *
+ * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
+ * Copright (C) 2018 Alexander Graf <agraf@suse.de>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+     BSD-2-Clause
+ *
+ * This file is inspired by arch/arm/lib/crt0_aarch64_efi.S
+ */
+
+#include <asm-generic/pe.h>
+
+#if __riscv_xlen == 64
+#define SIZE_LONG      8
+#define SAVE_LONG(reg, idx)    sd      reg, (idx*SIZE_LONG)(sp)
+#define LOAD_LONG(reg, idx)    ld      reg, (idx*SIZE_LONG)(sp)
+#define PE_MACHINE     0x5064
+#else
+#define SIZE_LONG      4
+#define SAVE_LONG(reg, idx)    sw      reg, (idx*SIZE_LONG)(sp)
+#define LOAD_LONG(reg, idx)    lw      reg, (idx*SIZE_LONG)(sp)
+#define PE_MACHINE     0x5032
+#endif
+
+
+       .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  PE_MACHINE                      /* RISC-V 64/32-bit */
+       .short  2                               /* nr_sections */
+       .long   0                               /* TimeDateStamp */
+       .long   0                               /* PointerToSymbolTable */
+       .long   1                               /* NumberOfSymbols */
+       .short  section_table - optional_header /* SizeOfOptionalHeader */
+       /*
+        * Characteristics: IMAGE_FILE_DEBUG_STRIPPED |
+        * IMAGE_FILE_EXECUTABLE_IMAGE | IMAGE_FILE_LINE_NUMS_STRIPPED
+        */
+       .short  0x206
+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  IMAGE_SUBSYSTEM_EFI_APPLICATION /* 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) */
+
+_start:
+       addi            sp, sp, -(SIZE_LONG * 3)
+       SAVE_LONG(a0, 0)
+       SAVE_LONG(a1, 1)
+       SAVE_LONG(ra, 2)
+
+       lla             a0, ImageBase
+       lla             a1, _DYNAMIC
+       call            _relocate
+       bne             a0, zero, 0f
+
+       LOAD_LONG(a1, 1)
+       LOAD_LONG(a0, 0)
+       call            efi_main
+
+       LOAD_LONG(ra, 2)
+
+0:     addi            sp, sp, (SIZE_LONG * 3)
+       ret
diff --git a/arch/riscv/lib/elf_riscv32_efi.lds b/arch/riscv/lib/elf_riscv32_efi.lds
new file mode 100644 (file)
index 0000000..96d1198
--- /dev/null
@@ -0,0 +1,70 @@
+/*
+ * U-Boot riscv32 EFI linker script
+ *
+ * SPDX-License-Identifier:    BSD-2-Clause
+ *
+ * Modified from arch/arm/lib/elf_aarch64_efi.lds
+ */
+
+OUTPUT_FORMAT("elf32-littleriscv", "elf32-littleriscv", "elf32-littleriscv")
+OUTPUT_ARCH(riscv)
+ENTRY(_start)
+SECTIONS
+{
+       .text 0x0 : {
+               _text = .;
+               *(.text.head)
+               *(.text)
+               *(.text.*)
+               *(.gnu.linkonce.t.*)
+               *(.srodata)
+               *(.rodata*)
+               . = ALIGN(16);
+       }
+       _etext = .;
+       _text_size = . - _text;
+       .dynamic  : { *(.dynamic) }
+       .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(16);
+               _bss_end = .;
+               _edata = .;
+       }
+       .rela.dyn : { *(.rela.dyn) }
+       .rela.plt : { *(.rela.plt) }
+       .rela.got : { *(.rela.got) }
+       .rela.data : { *(.rela.data) *(.rela.data*) }
+       _data_size = . - _etext;
+
+       . = 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/riscv/lib/elf_riscv64_efi.lds b/arch/riscv/lib/elf_riscv64_efi.lds
new file mode 100644 (file)
index 0000000..25c863d
--- /dev/null
@@ -0,0 +1,70 @@
+/*
+ * U-Boot riscv64 EFI linker script
+ *
+ * SPDX-License-Identifier:    BSD-2-Clause
+ *
+ * Modified from arch/arm/lib/elf_aarch64_efi.lds
+ */
+
+OUTPUT_FORMAT("elf64-littleriscv", "elf64-littleriscv", "elf64-littleriscv")
+OUTPUT_ARCH(riscv)
+ENTRY(_start)
+SECTIONS
+{
+       .text 0x0 : {
+               _text = .;
+               *(.text.head)
+               *(.text)
+               *(.text.*)
+               *(.gnu.linkonce.t.*)
+               *(.srodata)
+               *(.rodata*)
+               . = ALIGN(16);
+       }
+       _etext = .;
+       _text_size = . - _text;
+       .dynamic  : { *(.dynamic) }
+       .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(16);
+               _bss_end = .;
+               _edata = .;
+       }
+       .rela.dyn : { *(.rela.dyn) }
+       .rela.plt : { *(.rela.plt) }
+       .rela.got : { *(.rela.got) }
+       .rela.data : { *(.rela.data) *(.rela.data*) }
+       _data_size = . - _etext;
+
+       . = 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/riscv/lib/reloc_riscv_efi.c b/arch/riscv/lib/reloc_riscv_efi.c
new file mode 100644 (file)
index 0000000..d80ffc9
--- /dev/null
@@ -0,0 +1,97 @@
+/* reloc_riscv.c - position independent ELF shared object relocator
+   Copyright (C) 2018 Alexander Graf <agraf@suse.de>
+   Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
+   Copyright (C) 1999 Hewlett-Packard Co.
+       Contributed by David Mosberger <davidm@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>
+
+#if __riscv_xlen == 64
+#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 _relocate(long ldbase, Elf_Dyn *dyn, efi_handle_t image,
+                      struct efi_system_table *systab)
+{
+       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 *)((ulong)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 (ELF_R_TYPE(rel->r_info)) {
+               case R_RISCV_RELATIVE:
+                       addr = (ulong *)(ldbase + rel->r_offset);
+                       *addr = ldbase + rel->r_addend;
+                       break;
+               default:
+                       /* Panic */
+                       while (1) ;
+               }
+               rel = (Elf_Rela *)((char *)rel + relent);
+               relsz -= relent;
+       }
+       return EFI_SUCCESS;
+}