Modernize aarch64

Now that we've got "objcopy --target efi-app-aarch64" and similar, we
don't have to go through heroic effort to try to make aarch64 builds
work.

This patch updates to a gnu-efi branch that has newer aarch64 crt0 code,
and makes efi_aarch64_efi.lds be nearly identical to efi_x86_64_efi.lds.

Signed-off-by: Peter Jones <pjones@redhat.com>

.gitmodules

@@ -1,4 +1,4 @@
 [submodule "gnu-efi"]
  path = gnu-efi
  url = https://github.com/rhboot/gnu-efi.git
- branch = shim-15.5
+ branch = shim-15.6

Make.defaults

@@ -84,9 +84,7 @@ ifeq ($(ARCH),aarch64)
  ARCH_GNUEFI ?= aarch64
  ARCH_SUFFIX ?= aa64
  ARCH_SUFFIX_UPPER ?= AA64
- FORMAT := -O binary
- SUBSYSTEM := 0xa
- ARCH_LDFLAGS += --defsym=EFI_SUBSYSTEM=$(SUBSYSTEM)
+ ARCH_LDFLAGS ?=
  ARCH_CFLAGS ?=
 endif
 ifeq ($(ARCH),arm)

elf_aarch64_efi.lds

@@ -3,109 +3,94 @@ OUTPUT_ARCH(aarch64)
 ENTRY(_start)
 SECTIONS
 {
- .text 0x0 : {
- _text = .;
- *(.text.head)
- *(.text)
- *(.text.*)
- *(.gnu.linkonce.t.*)
- _evtext = .;
- . = ALIGN(4096);
+ . = 0;
+ ImageBase = .;
+ .hash : { *(.hash) } /* this MUST come first! */
+ . = ALIGN(4096);
+ .eh_frame :
+ {
+ *(.eh_frame)
+ }
+ . = ALIGN(4096);
+ .text :
+ {
+ _text = .;
+ *(.text)
+ *(.text.*)
+ *(.gnu.linkonce.t.*)
+ _etext = .;
+ }
+ . = ALIGN(4096);
+ .reloc :
+ {
+ *(.reloc)
+ }
+ . = ALIGN(4096);
+ .note.gnu.build-id : {
+ *(.note.gnu.build-id)
+ }
+
+ . = ALIGN(4096);
+ .data.ident : {
+ *(.data.ident)
  }
- _etext = .;
- _text_size = . - _text;
- _text_vsize = _evtext - _text;
 
  . = ALIGN(4096);
  .data :
  {
  _data = .;
- *(.sdata)
- *(.data)
- *(.data1)
- *(.data.*)
+ *(.rodata*)
  *(.got.plt)
  *(.got)
-
- *(.dynamic)
-
+ *(.data*)
+ *(.sdata)
  /* 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)
- _evdata = .;
- . = ALIGN(4096);
- _bss_end = .;
+ *(.rel.local)
  }
- _edata = .;
- _data_vsize = _evdata - _data;
- _data_size = . - _data;
 
- /*
- * Note that _sbat must be the beginning of the data, and _esbat must be the
- * end and must be before any section padding. The sbat self-check uses
- * _esbat to find the bounds of the data, and if the padding is included, the
- * CSV parser (correctly) rejects the data as having NUL values in one of the
- * required columns.
- */
  . = ALIGN(4096);
- .sbat :
+ .vendor_cert :
  {
- _sbat = .;
- *(.sbat)
- *(.sbat.*)
- _esbat = .;
- . = ALIGN(4096);
- _epsbat = .;
+ *(.vendor_cert)
  }
- _sbat_size = _epsbat - _sbat;
- _sbat_vsize = _esbat - _sbat;
-
  . = ALIGN(4096);
- .rodata :
- {
- _rodata = .;
- *(.rodata*)
- *(.srodata)
- . = ALIGN(16);
- *(.note.gnu.build-id)
- . = ALIGN(4096);
- *(.vendor_cert)
- *(.data.ident)
- . = ALIGN(4096);
- }
+ .dynamic : { *(.dynamic) }
  . = ALIGN(4096);
  .rela :
  {
- *(.rela.dyn)
- *(.rela.plt)
- *(.rela.got)
- *(.rela.data)
  *(.rela.data*)
+ *(.rela.got*)
+ *(.rela.stab*)
  }
+ _edata = .;
+ _data_size = . - _data;
  . = ALIGN(4096);
- .dyn :
+ .sbat :
  {
- *(.dynsym)
- *(.dynstr)
- _evrodata = .;
- . = ALIGN(4096);
+ _sbat = .;
+ *(.sbat)
+ *(.sbat.*)
  }
- _erodata = .;
- _rodata_size = . - _rodata;
- _rodata_vsize = _evrodata - _rodata;
- _alldata_size = . - _data;
+ _esbat = .;
+ _sbat_size = . - _sbat;
 
- /DISCARD/ :
+ . = ALIGN(4096);
+ .dynsym : { *(.dynsym) }
+ . = ALIGN(4096);
+ .dynstr : { *(.dynstr) }
+ . = ALIGN(4096);
+ .ignored.reloc :
  {
- *(.rel.reloc)
+ *(.rela.reloc)
  *(.eh_frame)
  *(.note.GNU-stack)
  }
  .comment 0 : { *(.comment) }
+ .note.gnu.build-id : { *(.note.gnu.build-id) }
 }