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gnu-efi/backport-0002-Make-loongarch64-use-efi-app-loongarch64.patch

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From 9298f84d8d18db669b1e3593a65080cc01b68ac6 Mon Sep 17 00:00:00 2001
From: Xiaotian Wu <wuxiaotian@loongson.cn>
Date: Thu, 18 May 2023 19:49:32 +0800
Subject: [PATCH 2/3] Make loongarch64 use efi-app-loongarch64
Binutils 2.41 now supports efi-app-loongarch64, so to use this we must add a
dummy reloc section and remove the PE header definition from crt0 as this will
conflict with the version added by objcopy
Signed-off-by: Xiaotian Wu <wuxiaotian@loongson.cn>
Signed-off-by: yueyuankun <yueyuankun@kylinos.cn>
---
Make.defaults | 4 +-
gnuefi/crt0-efi-loongarch64.S | 131 +++++----------------------------
gnuefi/elf_loongarch64_efi.lds | 75 ++++++++++++++++---
3 files changed, 86 insertions(+), 124 deletions(-)
diff --git a/Make.defaults b/Make.defaults
index 434a44e..0ef5a73 100755
--- a/Make.defaults
+++ b/Make.defaults
@@ -161,18 +161,16 @@ endif
ifneq ($(ARCH),arm)
ifneq ($(ARCH),mips64el)
ifneq ($(ARCH),riscv64)
-ifneq ($(ARCH),loongarch64)
export HAVE_EFI_OBJCOPY=y
endif
endif
endif
-endif
ifeq ($(ARCH),arm)
CFLAGS += -marm
endif
-ifeq ($(ARCH),aarch64)
+ifeq ($(ARCH),aarch64 loongarch64)
LDFLAGS += -z common-page-size=4096
LDFLAGS += -z max-page-size=4096
endif
diff --git a/gnuefi/crt0-efi-loongarch64.S b/gnuefi/crt0-efi-loongarch64.S
index af45d46..af939ff 100644
--- a/gnuefi/crt0-efi-loongarch64.S
+++ b/gnuefi/crt0-efi-loongarch64.S
@@ -17,115 +17,8 @@
* either version 2 of the License, or (at your option) any later version.
*/
-#ifndef EFI_SUBSYSTEM
-#define EFI_SUBSYSTEM 0xa
-#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 0x6264 // loongarch64 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)
-
- .align 4
-
+ .text
+ .align 12
.globl _start
.type _start, @function
_start:
@@ -143,9 +36,25 @@ _start:
ld.d $a0, $sp, 8
ld.d $a1, $sp, 16
- bl efi_main
+ bl _entry
0: ld.d $ra, $sp, 0
addi.d $sp, $sp, 24
jr $ra
- .end _start
+
+// hand-craft a dummy .reloc section so EFI knows it's a relocatable executable:
+
+ .data
+dummy: .4byte 0
+
+#define IMAGE_REL_ABSOLUTE 0
+ .section .reloc, "a"
+label1:
+ .4byte dummy-label1 // Page RVA
+ .4byte 12 // Block Size (2*4+2*2), must be aligned by 32 Bits
+ .2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
+ .2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
+
+#if defined(__ELF__) && defined(__linux__)
+ .section .note.GNU-stack,"",%progbits
+#endif
diff --git a/gnuefi/elf_loongarch64_efi.lds b/gnuefi/elf_loongarch64_efi.lds
index e7b4d6b..0132dbb 100644
--- a/gnuefi/elf_loongarch64_efi.lds
+++ b/gnuefi/elf_loongarch64_efi.lds
@@ -3,9 +3,17 @@ OUTPUT_ARCH(loongarch)
ENTRY(_start)
SECTIONS
{
- .text 0x0 : {
+ . = 0;
+ ImageBase = .;
+ /* .hash and/or .gnu.hash MUST come first! */
+ .hash : { *(.hash) }
+ .gnu.hash : { *(.gnu.hash) }
+ . = ALIGN(4096);
+ .eh_frame : { *(.eh_frame) }
+ .gcc_except_table : { *(.gcc_except_table*) }
+ . = ALIGN(4096);
+ .text : {
_text = .;
- *(.text.head)
*(.text)
*(.text.*)
*(.gnu.linkonce.t.*)
@@ -15,8 +23,15 @@ SECTIONS
}
_etext = .;
_text_size = . - _text;
+ . = ALIGN(4096);
+ .reloc :
+ {
+ KEEP (*(.reloc))
+ }
+ . = ALIGN(65536);
.dynamic : { *(.dynamic) }
- .data : ALIGN(4096)
+ . = ALIGN(4096);
+ .data :
{
_data = .;
*(.sdata)
@@ -26,6 +41,33 @@ SECTIONS
*(.got.plt)
*(.got)
+ /*
+ * Note that these aren't the using the GNU "CONSTRUCTOR" output section
+ * command, so they don't start with a size. Because of p2align and the
+ * end/END definitions, and the fact that they're mergeable, they can also
+ * have NULLs which aren't guaranteed to be at the end.
+ */
+ . = ALIGN(16);
+ __init_array_start = .;
+ *(SORT(.init_array.*))
+ *(.init_array)
+ __init_array_end = .;
+ . = ALIGN(16);
+ __CTOR_LIST__ = .;
+ *(SORT(.ctors.*))
+ *(.ctors)
+ __CTOR_END__ = .;
+ . = ALIGN(16);
+ __DTOR_LIST__ = .;
+ *(SORT(.dtors.*))
+ *(.dtors)
+ __DTOR_END__ = .;
+ . = ALIGN(16);
+ __fini_array_start = .;
+ *(SORT(.fini_array.*))
+ *(.fini_array)
+ __fini_array_end = .;
+
/* the EFI loader doesn't seem to like a .bss section, so we stick
it all into .data: */
. = ALIGN(16);
@@ -33,16 +75,30 @@ SECTIONS
*(.sbss)
*(.scommon)
*(.dynbss)
- *(.bss)
+ *(.bss*)
*(COMMON)
+ *(.rel.local)
. = ALIGN(16);
+
_bss_end = .;
}
- .rela.dyn : { *(.rela.dyn) }
+ . = ALIGN(4096);
+ .rela :
+ {
+ *(.rela.text*)
+ *(.rela.data*)
+ *(.rela.got)
+ *(.rela.dyn)
+ *(.rela.stab)
+ *(.rela.init_array*)
+ *(.rela.fini_array*)
+ *(.rela.ctors*)
+ *(.rela.dtors*)
+
+ }
+ . = ALIGN(4096);
.rela.plt : { *(.rela.plt) }
- .rela.got : { *(.rela.got) }
- .rela.data : { *(.rela.data) *(.rela.data*) }
. = ALIGN(512);
_edata = .;
_data_size = . - _data;
@@ -53,10 +109,9 @@ SECTIONS
.dynstr : { *(.dynstr) }
. = ALIGN(4096);
.note.gnu.build-id : { *(.note.gnu.build-id) }
- /DISCARD/ :
+ .ignored.reloc :
{
- *(.rel.reloc)
- *(.eh_frame)
+ *(.rela.reloc)
*(.note.GNU-stack)
}
.comment 0 : { *(.comment) }
--
2.43.0
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