Add support for 64-bit ARM architecture: AArch64

4 files changed, 75 insertions, 0 deletions

diff --git a/ld/emulparams/aarch64elf.sh b/ld/emulparams/aarch64elf.sh
new file mode 100644
index 0000000..d72e5f7
--- /dev/null
+++ b/ld/emulparams/aarch64elf.sh
@@ -0,0 +1,35 @@
+ARCH=aarch64
+MACHINE=
+NOP=0
+
+SCRIPT_NAME=elf
+OUTPUT_FORMAT="elf64-littleaarch64"
+BIG_OUTPUT_FORMAT="elf64-bigaarch64"
+LITTLE_OUTPUT_FORMAT="elf64-littleaarch64"
+NO_REL_RELOCS=yes
+
+TEMPLATE_NAME=elf32
+EXTRA_EM_FILE=aarch64elf
+
+GENERATE_SHLIB_SCRIPT=yes
+MAXPAGESIZE="CONSTANT (MAXPAGESIZE)"
+
+ENTRY=_start
+EMBEDDED=yes
+SEPARATE_GOTPLT=24
+TEXT_START_ADDR=0x00400000
+
+DATA_START_SYMBOLS='__data_start = . ;';
+
+# AArch64 does not support .s* sections.
+NO_SMALL_DATA=yes
+
+OTHER_BSS_SYMBOLS='__bss_start__ = .;'
+OTHER_BSS_END_SYMBOLS='_bss_end__ = . ; __bss_end__ = . ;'
+OTHER_END_SYMBOLS='__end__ = . ;'
+
+OTHER_SECTIONS='.note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }'
+ATTRS_SECTIONS='.ARM.attributes 0 : { KEEP (*(.ARM.attributes)) KEEP (*(.gnu.attributes)) }'
+
+# This sets the stack to the top of the simulator memory (2^19 bytes).
+STACK_ADDR=0x80000
diff --git a/ld/emulparams/aarch64elfb.sh b/ld/emulparams/aarch64elfb.sh
new file mode 100644
index 0000000..7a3ff97
--- /dev/null
+++ b/ld/emulparams/aarch64elfb.sh
@@ -0,0 +1,2 @@
+. ${srcdir}/emulparams/aarch64elf.sh
+OUTPUT_FORMAT="elf64-bigaarch64"
diff --git a/ld/emulparams/aarch64linux.sh b/ld/emulparams/aarch64linux.sh
new file mode 100644
index 0000000..a5a2500
--- /dev/null
+++ b/ld/emulparams/aarch64linux.sh
@@ -0,0 +1,36 @@
+ARCH=aarch64
+MACHINE=
+NOP=0
+
+SCRIPT_NAME=elf
+OUTPUT_FORMAT="elf64-littleaarch64"
+BIG_OUTPUT_FORMAT="elf64-bigaarch64"
+LITTLE_OUTPUT_FORMAT="elf64-littleaarch64"
+NO_REL_RELOCS=yes
+
+TEMPLATE_NAME=elf32
+EXTRA_EM_FILE=aarch64elf
+
+GENERATE_SHLIB_SCRIPT=yes
+GENERATE_PIE_SCRIPT=yes
+
+MAXPAGESIZE="CONSTANT (MAXPAGESIZE)"
+COMMONPAGESIZE="CONSTANT (COMMONPAGESIZE)"
+SEPARATE_GOTPLT=24
+IREL_IN_PLT=
+
+TEXT_START_ADDR=0x400000
+
+DATA_START_SYMBOLS='PROVIDE (__data_start = .);';
+
+# AArch64 does not support .s* sections.
+NO_SMALL_DATA=yes
+
+OTHER_BSS_SYMBOLS='__bss_start__ = .;'
+OTHER_BSS_END_SYMBOLS='_bss_end__ = . ; __bss_end__ = . ;'
+OTHER_END_SYMBOLS='__end__ = . ;'
+
+OTHER_SECTIONS='.note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }'
+ATTRS_SECTIONS='.ARM.attributes 0 : { KEEP (*(.ARM.attributes)) KEEP (*(.gnu.attributes)) }'
+# Ensure each PLT entry is aligned to a cache line.
+PLT=".plt          ${RELOCATING-0} : ALIGN(16) { *(.plt)${IREL_IN_PLT+ *(.iplt)} }"
diff --git a/ld/emulparams/aarch64linuxb.sh b/ld/emulparams/aarch64linuxb.sh
new file mode 100644
index 0000000..2bdf602
--- /dev/null
+++ b/ld/emulparams/aarch64linuxb.sh
@@ -0,0 +1,2 @@
+. ${srcdir}/emulparams/aarch64linux.sh
+OUTPUT_FORMAT="elf64-bigaarch64"