-[% IF c("var/linux-aarch64") -%]

-  # Avoid linking issues by backporting glibc patches

-  cd glibc-[% c("var/glibc_version") %]

-  patch -p1 <$rootdir/glibc-cross-linux-aarch64.patch

-  patch -p1 <$rootdir/glibc-cross-linux-aarch64-2.patch

-  cd /var/tmp/build/glibc

-[% END -%]

-  # Use stretch's glibc and stretch-security's linux

-  glibc_version: 2.24

-    sha256sum: 99d4a3e8efd144d71488e478f62587578c0f4e1fa0b4eed47ee3d4975ebeb5d3

-  - filename: 'glibc-cross-linux-aarch64.patch'

-    enable: '[% c("var/linux-aarch64") -%]'

-  - filename: 'glibc-cross-linux-aarch64-2.patch'

-    enable: '[% c("var/linux-aarch64") -%]'

-From e9177fba13549a8e2a6232f46080e5c6d3e467b1 Mon Sep 17 00:00:00 2001

-From: Szabolcs Nagy <szabolcs.nagy@arm.com>

-Date: Wed, 21 Jun 2017 13:47:07 +0100

-Subject: [PATCH] [AArch64] Use hidden __GI__dl_argv in rtld startup code

-

-We rely on the symbol being locally defined so using extern symbol

-is not correct and the linker may complain about the relocations.

----

- ChangeLog                    | 5 +++++

- sysdeps/aarch64/dl-machine.h | 4 ++--

- 2 files changed, 7 insertions(+), 2 deletions(-)

-

-Index: glibc/sysdeps/aarch64/dl-machine.h

-===================================================================

---- glibc.orig/sysdeps/aarch64/dl-machine.h

-+++ glibc/sysdeps/aarch64/dl-machine.h

-@@ -172,8 +172,8 @@ _dl_start_user:							\n\

- 	cmp	x0, #0						\n\

- 	bne	1b						\n\

- 	// Update _dl_argv					\n\

--	adrp	x3, _dl_argv					\n\

--	str	x2, [x3, #:lo12:_dl_argv]			\n\

-+	adrp	x3, __GI__dl_argv				\n\

-+	str	x2, [x3, #:lo12:__GI__dl_argv]			\n\

- .L_done_stack_adjust:						\n\

- 	// compute envp						\n\

- 	add	x3, x2, x1, lsl #3				\n\

--- 

-2.43.2

-

-From a68ba2f3cd3cbe32c1f31e13c20ed13487727b32 Mon Sep 17 00:00:00 2001

-From: Szabolcs Nagy <szabolcs.nagy@arm.com>

-Date: Wed, 18 Oct 2017 17:26:23 +0100

-Subject: [PATCH] [AARCH64] Rewrite elf_machine_load_address using _DYNAMIC

- symbol

-

-This patch rewrites aarch64 elf_machine_load_address to use special _DYNAMIC

-symbol instead of _dl_start.

-

-The static address of _DYNAMIC symbol is stored in the first GOT entry.

-Here is the change which makes this solution work (part of binutils 2.24):

-https://sourceware.org/ml/binutils/2013-06/msg00248.html

-

-i386, x86_64 targets use the same method to do this as well.

-

-The original implementation relies on a trick that R_AARCH64_ABS32 relocation

-being resolved at link time and the static address fits in the 32bits.

-However, in LP64, normally, the address is defined to be 64 bit.

-

-Here is the C version one which should be portable in all cases.

-

-	* sysdeps/aarch64/dl-machine.h (elf_machine_load_address): Use

-	_DYNAMIC symbol to calculate load address.

----

- ChangeLog                    |  5 +++++

- sysdeps/aarch64/dl-machine.h | 39 +++++-------------------------------

- 2 files changed, 10 insertions(+), 34 deletions(-)

-

-Index: glibc-2.26/sysdeps/aarch64/dl-machine.h

-===================================================================

---- glibc-2.26.orig/sysdeps/aarch64/dl-machine.h

-+++ glibc-2.26/sysdeps/aarch64/dl-machine.h

-@@ -51,26 +51,11 @@ elf_machine_load_address (void)

-   /* To figure out the load address we use the definition that for any symbol:

-      dynamic_addr(symbol) = static_addr(symbol) + load_addr

- 

--     The choice of symbol is arbitrary. The static address we obtain

--     by constructing a non GOT reference to the symbol, the dynamic

--     address of the symbol we compute using adrp/add to compute the

--     symbol's address relative to the PC.

--     This depends on 32bit relocations being resolved at link time

--     and that the static address fits in the 32bits.  */

-+    _DYNAMIC sysmbol is used here as its link-time address stored in

-+    the special unrelocated first GOT entry.  */

- 

--  ElfW(Addr) static_addr;

--  ElfW(Addr) dynamic_addr;

--

--  asm ("					\n"

--"	adrp	%1, _dl_start;			\n"

--"	add	%1, %1, #:lo12:_dl_start	\n"

--"	ldr	%w0, 1f				\n"

--"	b	2f				\n"

--"1:						\n"

--"	.word	_dl_start			\n"

--"2:						\n"

--    : "=r" (static_addr),  "=r" (dynamic_addr));

--  return dynamic_addr - static_addr;

-+    extern ElfW(Dyn) _DYNAMIC[] attribute_hidden;

-+    return (ElfW(Addr)) &_DYNAMIC - elf_machine_dynamic ();

- }

- 

- /* Set up the loaded object described by L so its unrelocated PLT

-[% IF c("var/windows") || c("var/android") %]

-[% ELSIF c("var/linux-cross") %]

-  # Since 1. we are using Debian's zlib1g-dev:$arch_debian, 2. our

-  # cross-toolchain's default paths (i.e. -I and -L) are not the same

-  # as those of Debian's cross-toolchain, and 3. tor's configure does

-  # not support separate header and library directories for zlib, we

-  # need to make the headers and $arch_debian library available to

-  # configure manually.

-  # DO NOT use CPPFLAGS="-I/usr/include" to include the headers, the

-  # build will fail (probably because some of our cross-$arch_debian

-  # headers get masked by the native ones).

-  CROSS_INCLUDEDIR=/var/tmp/dist/gcc/[% c("var/crosstarget") %]/include

-  ln -s /usr/include/zconf.h $CROSS_INCLUDEDIR

-  ln -s /usr/include/zlib.h $CROSS_INCLUDEDIR

-  export LDFLAGS="-L/usr/lib/[% c("var/crosstarget") %] $LDFLAGS"

-    [% IF c("var/windows") || c("var/android") %]--with-zlib-dir="$zlibdir"[% END %] \

-[% IF c("var/windows") || c("var/android") -%]

-      arch_deps:

-        - zlib1g-dev:arm64

-    enable: '[% c("var/windows") || c("var/android") %]'