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From 8481d3ccfc8e9cd3b689c43418e27ccfe722fcb2 Mon Sep 17 00:00:00 2001
From: Oliver Kowalke <oliver.kowalke@gmx.de>
Date: Mon, 23 Feb 2015 16:23:11 +0100
Subject: [PATCH 46/54] add support for ARM64/ELF
---
build/Jamfile.v2 | 30 +++++++++
config/arm.cpp | 2 +-
src/asm/jump_arm64_aapcs_elf_gas.S | 131 +++++++++++++++++++++++++++++++++++++
src/asm/make_arm64_aapcs_elf_gas.S | 85 ++++++++++++++++++++++++
4 files changed, 247 insertions(+), 1 deletion(-)
create mode 100644 src/asm/jump_arm64_aapcs_elf_gas.S
create mode 100644 src/asm/make_arm64_aapcs_elf_gas.S
diff --git a/libs/context/build/Jamfile.v2 b/libs/context/build/Jamfile.v2
index 80d1c46..4bf3fce 100644
--- a/libs/context/build/Jamfile.v2
+++ b/libs/context/build/Jamfile.v2
@@ -223,6 +223,36 @@ alias asm_context_sources
;
# ARM64
+# ARM64/AAPCS/ELF
+alias asm_context_sources
+ : [ make asm/make_arm64_aapcs_elf_gas.o : asm/make_arm64_aapcs_elf_gas.S : @gas64 ]
+ [ make asm/jump_arm64_aapcs_elf_gas.o : asm/jump_arm64_aapcs_elf_gas.S : @gas64 ]
+ : <abi>aapcs
+ <address-model>64
+ <architecture>arm
+ <binary-format>elf
+ ;
+
+alias asm_context_sources
+ : asm/make_arm64_aapcs_elf_gas.S
+ asm/jump_arm64_aapcs_elf_gas.S
+ : <abi>aapcs
+ <address-model>64
+ <architecture>arm
+ <binary-format>elf
+ <toolset>clang
+ ;
+
+alias asm_context_sources
+ : asm/make_arm64_aapcs_elf_gas.S
+ asm/jump_arm64_aapcs_elf_gas.S
+ : <abi>aapcs
+ <address-model>64
+ <architecture>arm
+ <binary-format>elf
+ <toolset>gcc
+ ;
+
# ARM64/AAPCS/MACH-O
alias asm_context_sources
: [ make asm/make_arm64_aapcs_macho_gas.o : asm/make_arm64_aapcs_macho_gas.S : @gas64 ]
diff --git a/libs/context/config/arm.cpp b/libs/context/config/arm.cpp
index 6a83737..6eece0b 100644
--- a/libs/context/config/arm.cpp
+++ b/libs/context/config/arm.cpp
@@ -6,7 +6,7 @@
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
-#if !defined(__arm__) && !defined(__thumb__) && \
+#if !defined(__aarch64__) && !defined(__arm__) && !defined(__thumb__) && \
!defined(__TARGET_ARCH_ARM) && !defined(__TARGET_ARCH_THUMB) && \
!defined(_ARM) && !defined(_M_ARM)
#error "Not ARM"
diff --git a/libs/context/src/asm/jump_arm64_aapcs_elf_gas.S b/libs/context/src/asm/jump_arm64_aapcs_elf_gas.S
new file mode 100644
index 0000000..46e029d
--- /dev/null
+++ b/libs/context/src/asm/jump_arm64_aapcs_elf_gas.S
@@ -0,0 +1,131 @@
+/*
+ Copyright Edward Nevill 2015
+ Distributed under the Boost Software License, Version 1.0.
+ (See accompanying file LICENSE_1_0.txt or copy at
+ http://www.boost.org/LICENSE_1_0.txt)
+*/
+/*******************************************************
+ * *
+ * ------------------------------------------------- *
+ * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | *
+ * ------------------------------------------------- *
+ * | 0x0 | 0x4 | 0x8 | 0xc | 0x10| 0x14| 0x18| 0x1c| *
+ * ------------------------------------------------- *
+ * | d8 | d9 | d10 | d11 | *
+ * ------------------------------------------------- *
+ * ------------------------------------------------- *
+ * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
+ * ------------------------------------------------- *
+ * | 0x20| 0x24| 0x28| 0x2c| 0x30| 0x34| 0x38| 0x3c| *
+ * ------------------------------------------------- *
+ * | d12 | d13 | d14 | d15 | *
+ * ------------------------------------------------- *
+ * ------------------------------------------------- *
+ * | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
+ * ------------------------------------------------- *
+ * | 0x40| 0x44| 0x48| 0x4c| 0x50| 0x54| 0x58| 0x5c| *
+ * ------------------------------------------------- *
+ * | x19 | x20 | x21 | x22 | *
+ * ------------------------------------------------- *
+ * ------------------------------------------------- *
+ * | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
+ * ------------------------------------------------- *
+ * | 0x60| 0x64| 0x68| 0x6c| 0x70| 0x74| 0x78| 0x7c| *
+ * ------------------------------------------------- *
+ * | x23 | x24 | x25 | x26 | *
+ * ------------------------------------------------- *
+ * ------------------------------------------------- *
+ * | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | *
+ * ------------------------------------------------- *
+ * | 0x80| 0x84| 0x88| 0x8c| 0x90| 0x94| 0x98| 0x9c| *
+ * ------------------------------------------------- *
+ * | x27 | x28 | FP | LR | *
+ * ------------------------------------------------- *
+ * ------------------------------------------------- *
+ * | 40 | 41 | 42 | 43 | | | *
+ * ------------------------------------------------- *
+ * | 0xa0| 0xa4| 0xa8| 0xac| | | *
+ * ------------------------------------------------- *
+ * | PC | align | | | *
+ * ------------------------------------------------- *
+ * *
+ *******************************************************/
+
+.cpu generic+fp+simd
+.text
+.align 2
+.global jump_fcontext
+.type jump_fcontext, %function
+jump_fcontext:
+ # prepare stack for GP + FPU
+ sub sp, sp, #0xb0
+
+# Because gcc may save integer registers in fp registers across a
+# function call we cannot skip saving the fp registers.
+#
+# Do not reinstate this test unless you fully understand what you
+# are doing.
+#
+# # test if fpu env should be preserved
+# cmp w3, #0
+# b.eq 1f
+
+ # save d8 - d15
+ stp d8, d9, [sp, #0x00]
+ stp d10, d11, [sp, #0x10]
+ stp d12, d13, [sp, #0x20]
+ stp d14, d15, [sp, #0x30]
+
+1:
+ # save x19-x30
+ stp x19, x20, [sp, #0x40]
+ stp x21, x22, [sp, #0x50]
+ stp x23, x24, [sp, #0x60]
+ stp x25, x26, [sp, #0x70]
+ stp x27, x28, [sp, #0x80]
+ stp x29, x30, [sp, #0x90]
+
+ # save LR as PC
+ str x30, [sp, #0xa0]
+
+ # store RSP (pointing to context-data) in first argument (x0).
+ # STR cannot have sp as a target register
+ mov x4, sp
+ str x4, [x0]
+
+ # restore RSP (pointing to context-data) from A2 (x1)
+ mov sp, x1
+
+# # test if fpu env should be preserved
+# cmp w3, #0
+# b.eq 2f
+
+ # load d8 - d15
+ ldp d8, d9, [x0, #0x00]
+ ldp d10, d11, [x0, #0x10]
+ ldp d12, d13, [x0, #0x20]
+ ldp d14, d15, [x0, #0x30]
+
+2:
+ # load x19-x30
+ ldp x19, x20, [sp, #0x40]
+ ldp x21, x22, [sp, #0x50]
+ ldp x23, x24, [sp, #0x60]
+ ldp x25, x26, [sp, #0x70]
+ ldp x27, x28, [sp, #0x80]
+ ldp x29, x30, [sp, #0x90]
+
+ # use third arg as return value after jump
+ # and as first arg in context function
+ mov x0, x2
+
+ # load pc
+ ldr x4, [sp, #0xa0]
+
+ # restore stack from GP + FPU
+ add sp, sp, #0xb0
+
+ ret x4
+.size jump_fcontext,.-jump_fcontext
+# Mark that we don't need executable stack.
+.section .note.GNU-stack,"",%progbits
diff --git a/libs/context/src/asm/make_arm64_aapcs_elf_gas.S b/libs/context/src/asm/make_arm64_aapcs_elf_gas.S
new file mode 100644
index 0000000..b208ab7
--- /dev/null
+++ b/libs/context/src/asm/make_arm64_aapcs_elf_gas.S
@@ -0,0 +1,85 @@
+/*
+ Copyright Edward Nevill 2015
+ Distributed under the Boost Software License, Version 1.0.
+ (See accompanying file LICENSE_1_0.txt or copy at
+ http://www.boost.org/LICENSE_1_0.txt)
+*/
+/*******************************************************
+ * *
+ * ------------------------------------------------- *
+ * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | *
+ * ------------------------------------------------- *
+ * | 0x0 | 0x4 | 0x8 | 0xc | 0x10| 0x14| 0x18| 0x1c| *
+ * ------------------------------------------------- *
+ * | d8 | d9 | d10 | d11 | *
+ * ------------------------------------------------- *
+ * ------------------------------------------------- *
+ * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
+ * ------------------------------------------------- *
+ * | 0x20| 0x24| 0x28| 0x2c| 0x30| 0x34| 0x38| 0x3c| *
+ * ------------------------------------------------- *
+ * | d12 | d13 | d14 | d15 | *
+ * ------------------------------------------------- *
+ * ------------------------------------------------- *
+ * | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
+ * ------------------------------------------------- *
+ * | 0x40| 0x44| 0x48| 0x4c| 0x50| 0x54| 0x58| 0x5c| *
+ * ------------------------------------------------- *
+ * | x19 | x20 | x21 | x22 | *
+ * ------------------------------------------------- *
+ * ------------------------------------------------- *
+ * | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
+ * ------------------------------------------------- *
+ * | 0x60| 0x64| 0x68| 0x6c| 0x70| 0x74| 0x78| 0x7c| *
+ * ------------------------------------------------- *
+ * | x23 | x24 | x25 | x26 | *
+ * ------------------------------------------------- *
+ * ------------------------------------------------- *
+ * | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | *
+ * ------------------------------------------------- *
+ * | 0x80| 0x84| 0x88| 0x8c| 0x90| 0x94| 0x98| 0x9c| *
+ * ------------------------------------------------- *
+ * | x27 | x28 | FP | LR | *
+ * ------------------------------------------------- *
+ * ------------------------------------------------- *
+ * | 40 | 41 | 42 | 43 | | | *
+ * ------------------------------------------------- *
+ * | 0xa0| 0xa4| 0xa8| 0xac| | | *
+ * ------------------------------------------------- *
+ * | PC | align | | | *
+ * ------------------------------------------------- *
+ * *
+ *******************************************************/
+
+.cpu generic+fp+simd
+.text
+.align 2
+.global make_fcontext
+.type make_fcontext, %function
+make_fcontext:
+ # shift address in x0 (allocated stack) to lower 16 byte boundary
+ and x0, x0, ~0xF
+
+ # reserve space for context-data on context-stack
+ sub x0, x0, #0xb0
+
+ # third arg of make_fcontext() == address of context-function
+ # store address as a PC to jump in
+ str x2, [x0, #0xa0]
+
+ # save address of finish as return-address for context-function
+ # will be entered after context-function returns (LR register)
+ adr x1, finish
+ str x1, [x0, #0x98]
+
+ ret x30 // return pointer to context-data (x0)
+
+finish:
+ # exit code is zero
+ mov x0, #0
+ # exit application
+ bl _exit
+
+.size make_fcontext,.-make_fcontext
+# Mark that we don't need executable stack.
+.section .note.GNU-stack,"",%progbits
--
2.3.5
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