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-rw-r--r--libs/context/src/asm/jump_arm64_aapcs_elf_gas.S131
-rw-r--r--libs/context/src/asm/jump_arm64_aapcs_macho_gas.S120
-rw-r--r--libs/context/src/asm/jump_arm_aapcs_macho_gas.S2
-rw-r--r--libs/context/src/asm/make_arm64_aapcs_elf_gas.S85
-rw-r--r--libs/context/src/asm/make_arm64_aapcs_macho_gas.S83
-rw-r--r--libs/context/src/execution_context.cpp36
-rw-r--r--libs/context/src/posix/stack_traits.cpp110
-rw-r--r--libs/context/src/windows/stack_traits.cpp124
8 files changed, 690 insertions, 1 deletions
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 000000000..09bd7b522
--- /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, [sp, #0x00]
+ ldp d10, d11, [sp, #0x10]
+ ldp d12, d13, [sp, #0x20]
+ ldp d14, d15, [sp, #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/jump_arm64_aapcs_macho_gas.S b/libs/context/src/asm/jump_arm64_aapcs_macho_gas.S
new file mode 100644
index 000000000..958178ee7
--- /dev/null
+++ b/libs/context/src/asm/jump_arm64_aapcs_macho_gas.S
@@ -0,0 +1,120 @@
+/*******************************************************
+ * *
+ * ------------------------------------------------- *
+ * | 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 | | | *
+ * ------------------------------------------------- *
+ * *
+ *******************************************************/
+
+.text
+.globl _jump_fcontext
+.balign 16
+_jump_fcontext:
+ ; prepare stack for GP + FPU
+ sub sp, sp, #0xb0
+
+#if (defined(__VFP_FP__) && !defined(__SOFTFP__))
+ ; 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:
+#endif
+
+ ; 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 fp, lr, [sp, #0x90]
+
+ ; save LR as PC
+ str lr, [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
+
+#if (defined(__VFP_FP__) && !defined(__SOFTFP__))
+ ; test if fpu env should be preserved
+ cmp w3, #0
+ b.eq 2f
+
+ ; load d8 - d15
+ ldp d8, d9, [sp, #0x00]
+ ldp d10, d11, [sp, #0x10]
+ ldp d12, d13, [sp, #0x20]
+ ldp d14, d15, [sp, #0x30]
+
+2:
+#endif
+
+ ; 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 fp, lr, [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
diff --git a/libs/context/src/asm/jump_arm_aapcs_macho_gas.S b/libs/context/src/asm/jump_arm_aapcs_macho_gas.S
index 618487531..759353474 100644
--- a/libs/context/src/asm/jump_arm_aapcs_macho_gas.S
+++ b/libs/context/src/asm/jump_arm_aapcs_macho_gas.S
@@ -91,7 +91,7 @@ _jump_fcontext:
add sp, sp, #64
@ restore SjLj handler
- pop v1
+ pop {v1}
@ store SjLj handler in TLS
str v1, [v2, #72]
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 000000000..b208ab7f3
--- /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
diff --git a/libs/context/src/asm/make_arm64_aapcs_macho_gas.S b/libs/context/src/asm/make_arm64_aapcs_macho_gas.S
new file mode 100644
index 000000000..6b55a08ad
--- /dev/null
+++ b/libs/context/src/asm/make_arm64_aapcs_macho_gas.S
@@ -0,0 +1,83 @@
+/*******************************************************
+ * *
+ * ------------------------------------------------- *
+ * | 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 | | | *
+ * ------------------------------------------------- *
+ * *
+ *******************************************************/
+
+
+.text
+.globl _make_fcontext
+.balign 16
+
+_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]
+
+ ; compute abs address of label finish
+ ; 0x0c = 3 instructions * size (4) before label 'finish'
+
+ ; TODO: Numeric offset since llvm still does not support labels in ADR. Fix:
+ ; http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20140407/212336.html
+ adr x1, 0x0c
+
+ ; save address of finish as return-address for context-function
+ ; will be entered after context-function returns (LR register)
+ str x1, [x0, #0x98]
+
+ ret lr ; return pointer to context-data (x0)
+
+finish:
+ ; exit code is zero
+ mov x0, #0
+ ; exit application
+ bl __exit
+
+
diff --git a/libs/context/src/execution_context.cpp b/libs/context/src/execution_context.cpp
new file mode 100644
index 000000000..969a74bdd
--- /dev/null
+++ b/libs/context/src/execution_context.cpp
@@ -0,0 +1,36 @@
+
+// Copyright Oliver Kowalke 2009.
+// 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)
+
+#include <boost/context/detail/config.hpp>
+
+#if ! defined(BOOST_CONTEXT_NO_EXECUTION_CONTEXT)
+
+# include "boost/context/execution_context.hpp"
+
+# include <boost/config.hpp>
+
+# ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_PREFIX
+# endif
+
+namespace boost {
+namespace context {
+
+thread_local
+execution_context::fcontext
+execution_context::main_ctx_;
+
+thread_local
+execution_context::ptr_t
+execution_context::current_ctx_ = & execution_context::main_ctx_;
+
+}}
+
+# ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_SUFFIX
+# endif
+
+#endif
diff --git a/libs/context/src/posix/stack_traits.cpp b/libs/context/src/posix/stack_traits.cpp
new file mode 100644
index 000000000..83b54a746
--- /dev/null
+++ b/libs/context/src/posix/stack_traits.cpp
@@ -0,0 +1,110 @@
+
+// Copyright Oliver Kowalke 2014.
+// 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)
+
+#include "boost/context/stack_traits.hpp"
+
+extern "C" {
+#include <signal.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <unistd.h>
+}
+
+//#if _POSIX_C_SOURCE >= 200112L
+
+#include <algorithm>
+#include <cmath>
+
+#include <boost/assert.hpp>
+#include <boost/config.hpp>
+# include <boost/thread.hpp>
+
+#if !defined (SIGSTKSZ)
+# define SIGSTKSZ (8 * 1024)
+# define UDEF_SIGSTKSZ
+#endif
+
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_PREFIX
+#endif
+
+namespace boost {
+namespace context {
+
+void pagesize_( std::size_t * size)
+{
+ // conform to POSIX.1-2001
+ * size = ::sysconf( _SC_PAGESIZE);
+}
+
+void stacksize_limit_( rlimit * limit)
+{
+ // conforming to POSIX.1-2001
+#if defined(BOOST_DISABLE_ASSERTS)
+ ::getrlimit( RLIMIT_STACK, limit);
+#else
+ const int result = ::getrlimit( RLIMIT_STACK, limit);
+ BOOST_ASSERT( 0 == result);
+ (void)result;
+#endif
+}
+
+std::size_t pagesize()
+{
+ static std::size_t size = 0;
+ static boost::once_flag flag;
+ boost::call_once( flag, pagesize_, & size);
+ return size;
+}
+
+rlimit stacksize_limit()
+{
+ static rlimit limit;
+ static boost::once_flag flag;
+ boost::call_once( flag, stacksize_limit_, & limit);
+ return limit;
+}
+
+bool
+stack_traits::is_unbounded() BOOST_NOEXCEPT
+{ return RLIM_INFINITY == stacksize_limit().rlim_max; }
+
+std::size_t
+stack_traits::page_size() BOOST_NOEXCEPT
+{ return pagesize(); }
+
+std::size_t
+stack_traits::default_size() BOOST_NOEXCEPT
+{
+ std::size_t size = 8 * minimum_size();
+ if ( is_unbounded() ) return size;
+
+ BOOST_ASSERT( maximum_size() >= minimum_size() );
+ return maximum_size() == size
+ ? size
+ : (std::min)( size, maximum_size() );
+}
+
+std::size_t
+stack_traits::minimum_size() BOOST_NOEXCEPT
+{ return SIGSTKSZ; }
+
+std::size_t
+stack_traits::maximum_size() BOOST_NOEXCEPT
+{
+ BOOST_ASSERT( ! is_unbounded() );
+ return static_cast< std::size_t >( stacksize_limit().rlim_max);
+}
+
+}}
+
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_SUFFIX
+#endif
+
+#ifdef UDEF_SIGSTKSZ
+# undef SIGSTKSZ
+#endif
diff --git a/libs/context/src/windows/stack_traits.cpp b/libs/context/src/windows/stack_traits.cpp
new file mode 100644
index 000000000..7e67232e7
--- /dev/null
+++ b/libs/context/src/windows/stack_traits.cpp
@@ -0,0 +1,124 @@
+
+// Copyright Oliver Kowalke 2014.
+// 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)
+
+#include "boost/context/stack_traits.hpp"
+
+extern "C" {
+#include <windows.h>
+}
+
+//#if defined (BOOST_WINDOWS) || _POSIX_C_SOURCE >= 200112L
+
+#include <algorithm>
+#include <cmath>
+#include <cstddef>
+#include <cstring>
+#include <stdexcept>
+
+#include <boost/assert.hpp>
+#include <boost/context/detail/config.hpp>
+#if __cplusplus < 201103L
+# include <boost/thread.hpp>
+#else
+# include <mutex>
+#endif
+
+#include <boost/context/stack_context.hpp>
+
+// x86_64
+// test x86_64 before i386 because icc might
+// define __i686__ for x86_64 too
+#if defined(__x86_64__) || defined(__x86_64) \
+ || defined(__amd64__) || defined(__amd64) \
+ || defined(_M_X64) || defined(_M_AMD64)
+
+// Windows seams not to provide a constant or function
+// telling the minimal stacksize
+# define MIN_STACKSIZE 8 * 1024
+#else
+# define MIN_STACKSIZE 4 * 1024
+#endif
+
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_PREFIX
+#endif
+
+namespace boost {
+namespace context {
+
+#if __cplusplus < 201103L
+void system_info_( SYSTEM_INFO * si)
+{ ::GetSystemInfo( si); }
+
+SYSTEM_INFO system_info()
+{
+ static SYSTEM_INFO si;
+ static boost::once_flag flag;
+ boost::call_once( flag, static_cast< void(*)( SYSTEM_INFO *) >( system_info_), & si);
+ return si;
+}
+#else
+SYSTEM_INFO system_info()
+{
+ static SYSTEM_INFO si;
+ static std::once_flag flag;
+ std::call_once( flag, [](){ ::GetSystemInfo( & si); } );
+ return si;
+}
+#endif
+
+std::size_t pagesize()
+{ return static_cast< std::size_t >( system_info().dwPageSize); }
+
+std::size_t page_count( std::size_t stacksize)
+{
+ return static_cast< std::size_t >(
+ std::floor(
+ static_cast< float >( stacksize) / pagesize() ) );
+}
+
+// Windows seams not to provide a limit for the stacksize
+// libcoco uses 32k+4k bytes as minimum
+bool
+stack_traits::is_unbounded() BOOST_NOEXCEPT
+{ return true; }
+
+std::size_t
+stack_traits::page_size() BOOST_NOEXCEPT
+{ return pagesize(); }
+
+std::size_t
+stack_traits::default_size() BOOST_NOEXCEPT
+{
+ std::size_t size = 64 * 1024; // 64 kB
+ if ( is_unbounded() )
+ return (std::max)( size, minimum_size() );
+
+ BOOST_ASSERT( maximum_size() >= minimum_size() );
+ return maximum_size() == minimum_size()
+ ? minimum_size()
+ : ( std::min)( size, maximum_size() );
+}
+
+// because Windows seams not to provide a limit for minimum stacksize
+std::size_t
+stack_traits::minimum_size() BOOST_NOEXCEPT
+{ return MIN_STACKSIZE; }
+
+// because Windows seams not to provide a limit for maximum stacksize
+// maximum_size() can never be called (pre-condition ! is_unbounded() )
+std::size_t
+stack_traits::maximum_size() BOOST_NOEXCEPT
+{
+ BOOST_ASSERT( ! is_unbounded() );
+ return 1 * 1024 * 1024 * 1024; // 1GB
+}
+
+}}
+
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_SUFFIX
+#endif
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