From 86062740f1e8eeb4c554055cf304dc1e0e87ea43 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sun, 8 Mar 2015 13:23:20 -0400
Subject: initial commit of core port files. signed-off by Z. Gilboa; see
 copying.midipix (9cd0746c) for additional information.

---
 arch/nt64/atomic.h                  |   7 +
 arch/nt64/psxglue.h                 |  63 ++++++
 arch/nt64/pthread_arch.h            |  74 +++++++
 arch/nt64/reloc.h                   |   6 +
 arch/nt64/src/crt_glue.c            |  87 ++++++++
 arch/nt64/src/crt_pe.c              |   7 +
 arch/nt64/src/crt_tls.c             |  27 +++
 arch/nt64/src/libc_entry_point.c    |  10 +
 arch/nt64/src/syscall_disp.c        |  22 ++
 arch/nt64/src/vtbl.c                |  12 ++
 arch/nt64/syscall_arch.h            |  63 ++++++
 crt/nt64/Scrt1.c                    |   2 +
 crt/nt64/crt1.c                     |  33 +++
 crt/nt64/crtdev.c                   |   3 +
 crt/nt64/crte.s                     |  19 ++
 crt/nt64/crti.s                     |  41 ++++
 crt/nt64/crtn.s                     |  13 ++
 crt/nt64/crtposix.c                 |   3 +
 musl.lzy                            | 389 ++++++++++++++++++++++++++++++++++++
 src/env/nt64/__environ.s            |  11 +
 src/fcntl/nt64/posix_fadvise.c      |  14 ++
 src/internal/nt64/libc.c            |   7 +
 src/internal/nt64/syscall.s         |   5 +
 src/ldso/nt64/dl_iterate_phdr.c     |  10 +
 src/ldso/nt64/dynlink.c             |  58 ++++++
 src/ldso/nt64/start.s               |   2 +
 src/ldso/nt64/tlsdesc.c             |   8 +
 src/setjmp/nt64/longjmp.s           |  28 +++
 src/setjmp/nt64/setjmp.s            |  23 +++
 src/thread/nt64/__set_thread_area.c |  13 ++
 src/thread/nt64/__tls_get_addr.c    |   2 +
 src/thread/nt64/clone.c             |  62 ++++++
 src/thread/nt64/pthread_detach.c    |   6 +
 src/thread/nt64/pthread_equal.c     |   6 +
 src/thread/nt64/pthread_self.c      |  10 +
 src/thread/nt64/syscall_cp.s        |  29 +++
 36 files changed, 1175 insertions(+)
 create mode 100644 arch/nt64/atomic.h
 create mode 100644 arch/nt64/psxglue.h
 create mode 100644 arch/nt64/pthread_arch.h
 create mode 100644 arch/nt64/reloc.h
 create mode 100644 arch/nt64/src/crt_glue.c
 create mode 100644 arch/nt64/src/crt_pe.c
 create mode 100644 arch/nt64/src/crt_tls.c
 create mode 100644 arch/nt64/src/libc_entry_point.c
 create mode 100644 arch/nt64/src/syscall_disp.c
 create mode 100644 arch/nt64/src/vtbl.c
 create mode 100644 arch/nt64/syscall_arch.h
 create mode 100644 crt/nt64/Scrt1.c
 create mode 100644 crt/nt64/crt1.c
 create mode 100644 crt/nt64/crtdev.c
 create mode 100644 crt/nt64/crte.s
 create mode 100644 crt/nt64/crti.s
 create mode 100644 crt/nt64/crtn.s
 create mode 100644 crt/nt64/crtposix.c
 create mode 100644 musl.lzy
 create mode 100644 src/env/nt64/__environ.s
 create mode 100644 src/fcntl/nt64/posix_fadvise.c
 create mode 100644 src/internal/nt64/libc.c
 create mode 100644 src/internal/nt64/syscall.s
 create mode 100644 src/ldso/nt64/dl_iterate_phdr.c
 create mode 100644 src/ldso/nt64/dynlink.c
 create mode 100644 src/ldso/nt64/start.s
 create mode 100644 src/ldso/nt64/tlsdesc.c
 create mode 100644 src/setjmp/nt64/longjmp.s
 create mode 100644 src/setjmp/nt64/setjmp.s
 create mode 100644 src/thread/nt64/__set_thread_area.c
 create mode 100644 src/thread/nt64/__tls_get_addr.c
 create mode 100644 src/thread/nt64/clone.c
 create mode 100644 src/thread/nt64/pthread_detach.c
 create mode 100644 src/thread/nt64/pthread_equal.c
 create mode 100644 src/thread/nt64/pthread_self.c
 create mode 100644 src/thread/nt64/syscall_cp.s

diff --git a/arch/nt64/atomic.h b/arch/nt64/atomic.h
new file mode 100644
index 0000000..a2b141a
--- /dev/null
+++ b/arch/nt64/atomic.h
@@ -0,0 +1,7 @@
+#ifndef _INTERNAL_ATOMIC_NT64_H
+#define _INTERNAL_ATOMIC_NT64_H
+
+#include "../x86_64/atomic.h"
+
+#endif
+
diff --git a/arch/nt64/psxglue.h b/arch/nt64/psxglue.h
new file mode 100644
index 0000000..73ad2b0
--- /dev/null
+++ b/arch/nt64/psxglue.h
@@ -0,0 +1,63 @@
+#ifndef _PSXGLUE_H_
+#define _PSXGLUE_H_
+
+#define __PSXOPT_NATIVE		0x0
+#define __PSXOPT_POSIX		0x1
+#define __PSXOPT_TTYDBG		0x2
+#define __PSXOPT_LDSO		0x4
+
+typedef int	__ldso_dladdr(const void * addr, void * info);
+typedef int	__ldso_dlinfo(void * dso, int req, void * res);
+typedef void *	__ldso_dlsym(void * p, const char * s, void * ra);
+typedef void *	__ldso_dlopen(const char * file, int mode);
+typedef int	__ldso_dlclose(void *p);
+typedef char *	__ldso_dlerror(void);
+typedef void	__ldso_reset_tls(void);
+
+typedef void	__psx_convert_thread(void);
+typedef void	__psx_unmapself(void *, void *);
+typedef void *	__psx_get_osfhandle(int fd);
+
+struct __ldso_vtbl {
+	__ldso_dladdr *		dladdr;
+	__ldso_dlinfo *		dlinfo;
+	__ldso_dlsym *		dlsym;
+	__ldso_dlopen *		dlopen;
+	__ldso_dlclose *	dlclose;
+	__ldso_dlerror *	dlerror;
+	__ldso_reset_tls *	reset_tls;
+};
+
+struct __psx_vtbl {
+	__psx_convert_thread *	convert_thread;
+	__psx_unmapself *	unmapself;
+	__psx_get_osfhandle *	get_osfhandle;
+};
+
+struct __psx_context {
+	int			size;
+	int			options;
+	void ***		sys_vtbl;
+	struct __ldso_vtbl *	ldso_vtbl;
+	struct __psx_vtbl *	psx_vtbl;
+	unsigned int		teb_sys_idx;
+	unsigned int		teb_libc_idx;
+	void *			pthread_surrogate_fn;
+	void *			pthread_create_fn;
+};
+
+struct __tlca {
+	void *	pthread_self;
+	int *	pthread_set_child_tid;
+	int *	pthread_clear_child_tid;
+	char *	pthread_tls;
+	char ***pthread_dtls;
+};
+
+typedef int __psx_init_routine(
+	int *			argc,
+	char ***		argv,
+	char ***		envp,
+	struct __psx_context *	ctx);
+
+#endif
diff --git a/arch/nt64/pthread_arch.h b/arch/nt64/pthread_arch.h
new file mode 100644
index 0000000..98babcd
--- /dev/null
+++ b/arch/nt64/pthread_arch.h
@@ -0,0 +1,74 @@
+#include <stddef.h>
+
+#define	TP_ADJ(p)	(p)
+#define	CANCEL_REG_IP	16
+
+extern uintptr_t __teb_sys_idx;
+extern uintptr_t __teb_libc_idx;
+
+struct __os_tib {
+	void *	exception_list;
+	void *	stack_base;
+	void *	stack_limit;
+};
+
+static __inline__ void * __os_get_teb_address(void)
+{
+	void * ptrRet;
+	__asm__ __volatile__ (
+		"mov %%gs:0x30, %0\n\t"
+		: "=r" (ptrRet) : :
+		);
+	return ptrRet;
+}
+
+
+static inline void __pthread_convert(void)
+{
+	/* (third-party thread support) */
+	__asm__ __volatile__ (
+		"push %rax\n\t"
+		"movq __psx_vtbl,%rax\n\t"
+		"call *(%rax)\n\t"
+		"pop  %rax\n\t"
+		);
+}
+
+
+static inline struct pthread ** __psx_tlca(void)
+{
+	struct pthread **	ptlca;
+	struct __os_tib *	tib;
+	void **			slots;
+	void ***		xslots;
+	uintptr_t		sys_idx;
+
+	tib = __os_get_teb_address();
+	sys_idx = __teb_sys_idx;
+
+	if (sys_idx < 64) {
+		slots = (void **)((uintptr_t)tib + 0x1480);
+		ptlca = (struct pthread **)(slots[sys_idx]);
+	} else {
+		xslots = (void ***)((uintptr_t)tib + 0x1780);
+		slots  = *xslots;
+		ptlca = (struct pthread **)(slots[sys_idx - 64]);
+	}
+
+	return ptlca;
+}
+
+
+static inline struct pthread * __pthread_self(void)
+{
+	struct pthread ** ptlca;
+
+	ptlca = __psx_tlca();
+	if (ptlca) return *ptlca;
+
+	/* (third-party thread) */
+	__pthread_convert();
+	ptlca = __psx_tlca();
+	return *ptlca;
+}
+
diff --git a/arch/nt64/reloc.h b/arch/nt64/reloc.h
new file mode 100644
index 0000000..20abf44
--- /dev/null
+++ b/arch/nt64/reloc.h
@@ -0,0 +1,6 @@
+#define LDSO_ARCH "PE32+"
+
+static int remap_rel(int type)
+{
+	return 0;
+}
diff --git a/arch/nt64/src/crt_glue.c b/arch/nt64/src/crt_glue.c
new file mode 100644
index 0000000..e8a07de
--- /dev/null
+++ b/arch/nt64/src/crt_glue.c
@@ -0,0 +1,87 @@
+#include <unistd.h>
+#include <pthread.h>
+#include "atomic.h"
+#include "syscall.h"
+#include "psxglue.h"
+#include "pthread_impl.h"
+
+extern struct __ldso_vtbl *	__ldso_vtbl;
+extern struct __psx_vtbl *	__psx_vtbl;
+
+typedef int __app_main();
+typedef int __pthread_surrogate_routine(struct pthread *);
+
+extern int _init(void);
+static int __pthread_surrogate_init(struct pthread * self);
+
+extern int __libc_start_main(
+	void *	main,
+	int	argc,
+	char **	argv);
+
+void __libc_entry_routine(
+	__app_main *		__main,
+	__psx_init_routine *	__psx_init_routine,
+	int			options)
+{
+	int			argc;
+	char **			argv;
+	char **			envp;
+	struct __psx_context	ctx;
+
+	/* ctx init */
+	ctx.size		= sizeof(ctx);
+	ctx.options		= options;
+	ctx.pthread_create_fn	= pthread_create;
+	ctx.pthread_surrogate_fn= __pthread_surrogate_init;
+
+	/* __psx_init must succeed... */
+	if (__psx_init_routine(&argc,&argv,&envp,&ctx))
+		a_crash();
+
+	/* ...and conform */
+	else if (envp != argv + (argc + 1))
+		a_crash();
+
+	/* dso init routines */
+	_init();
+
+	/* write once */
+	__syscall_vtbl	= (unsigned long **)ctx.sys_vtbl;
+	__ldso_vtbl	= ctx.ldso_vtbl;
+	__psx_vtbl	= ctx.psx_vtbl;
+	__teb_sys_idx	= ctx.teb_sys_idx;
+	__teb_libc_idx	= ctx.teb_libc_idx;
+
+	/* enter libc */
+	__libc_start_main(__main,argc,argv);
+
+	/* guard */
+	a_crash();
+}
+
+static int __pthread_surrogate_init(struct pthread * self)
+{
+	/**
+	 * invoked by psxscl upon creation of a surrogate libc
+	 * thread, which in turn may only call pthread_create();
+	 *
+	 * the purpose of this mecahnism is to support a scenario
+	 * where a third-party library creates a non-posix thread
+	 * which then calls, be it directly or via a callback
+	 * function, a libc api that depends on a valid
+	 * pthread_self.
+	 *
+	 * self: a pointer to an already zero'ed memory page
+	 *
+	 * struct pthread relevant members:
+	 * --------------------------------
+	 * cancel (already zero)
+	 * canary (already zero)
+	 *
+	 * pthread_create() reference:
+	 * 1a47ed15eebf96d0c8d5de4aea54108bc8cc3f53
+	**/
+
+	return 0;
+}
diff --git a/arch/nt64/src/crt_pe.c b/arch/nt64/src/crt_pe.c
new file mode 100644
index 0000000..0dc75a4
--- /dev/null
+++ b/arch/nt64/src/crt_pe.c
@@ -0,0 +1,7 @@
+#include "pthread_impl.h"
+#include <threads.h>
+
+void * __pthread_getspecific_impl(pthread_key_t k)
+{
+	return (__pthread_self())->tsd[k];
+}
diff --git a/arch/nt64/src/crt_tls.c b/arch/nt64/src/crt_tls.c
new file mode 100644
index 0000000..15183d3
--- /dev/null
+++ b/arch/nt64/src/crt_tls.c
@@ -0,0 +1,27 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "psxglue.h"
+#include "pthread_arch.h"
+
+typedef unsigned int __tls_word	__attribute__((mode(word)));
+typedef unsigned int __tls_ptr	__attribute__((mode(pointer)));
+
+struct __emutls_object
+{
+	__tls_word	size;
+	__tls_word	align;
+	ptrdiff_t	offset;
+	void *		defval;
+};
+
+void * __emutls_get_address (struct __emutls_object * obj)
+{
+	int dsoidx = obj->align & 0xFFFF0000;
+	struct __tlca * tlca = (struct __tlca *)__psx_tlca();
+
+	if (dsoidx)
+		return (*tlca->pthread_dtls)[dsoidx >> 16] + obj->offset;
+	else
+		return tlca->pthread_tls + obj->offset;
+}
+
diff --git a/arch/nt64/src/libc_entry_point.c b/arch/nt64/src/libc_entry_point.c
new file mode 100644
index 0000000..0929cc4
--- /dev/null
+++ b/arch/nt64/src/libc_entry_point.c
@@ -0,0 +1,10 @@
+typedef unsigned int uint32_t;
+
+int __libc_entry_point(
+	void *		hinstance,
+	uint32_t	reason,
+	void *		reserved)
+{
+	return 1;
+}
+
diff --git a/arch/nt64/src/syscall_disp.c b/arch/nt64/src/syscall_disp.c
new file mode 100644
index 0000000..cb9655d
--- /dev/null
+++ b/arch/nt64/src/syscall_disp.c
@@ -0,0 +1,22 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "syscall.h"
+#include "psxglue.h"
+
+extern struct __psx_vtbl * __psx_vtbl;
+
+void __unmapself(void * base, size_t size)
+{
+	__psx_vtbl->unmapself(base,size);
+}
+
+uintptr_t __syscall_disp(long n,
+		uintptr_t a1,
+		uintptr_t a2,
+		uintptr_t a3,
+		uintptr_t a4,
+		uintptr_t a5,
+		uintptr_t a6)
+{
+	return __syscall(n,a1,a2,a3,a4,a5,a6);
+}
diff --git a/arch/nt64/src/vtbl.c b/arch/nt64/src/vtbl.c
new file mode 100644
index 0000000..028f153
--- /dev/null
+++ b/arch/nt64/src/vtbl.c
@@ -0,0 +1,12 @@
+#include "psxglue.h"
+
+unsigned long **	__syscall_vtbl	= 0;
+struct __ldso_vtbl *	__ldso_vtbl	= 0;
+struct __psx_vtbl *	__psx_vtbl	= 0;
+unsigned long		__teb_sys_idx	= 0;
+unsigned long		__teb_libc_idx	= 0;
+
+void ___chkstk_ms(void)
+{
+}
+
diff --git a/arch/nt64/syscall_arch.h b/arch/nt64/syscall_arch.h
new file mode 100644
index 0000000..9c8fea4
--- /dev/null
+++ b/arch/nt64/syscall_arch.h
@@ -0,0 +1,63 @@
+extern unsigned long ** __syscall_vtbl;
+
+typedef long __syscall0_fn(void);
+typedef long __syscall1_fn(long a1);
+typedef long __syscall2_fn(long a1, long a2);
+typedef long __syscall3_fn(long a1, long a2, long a3);
+typedef long __syscall4_fn(long a1, long a2, long a3, long a4);
+typedef long __syscall5_fn(long a1, long a2, long a3, long a4, long a5);
+typedef long __syscall6_fn(long a1, long a2, long a3, long a4, long a5, long a6);
+
+#define sysfn_from_fn(x) \
+	x * sysfn = (x *)__syscall_vtbl[n]
+
+static __inline long __syscall0(long n)
+{
+	sysfn_from_fn(__syscall0_fn);
+	return sysfn();
+}
+
+static __inline long __syscall1(long n, long a1)
+{
+	sysfn_from_fn(__syscall1_fn);
+	return sysfn(a1);
+}
+
+static __inline long __syscall2(long n, long a1, long a2)
+{
+	sysfn_from_fn(__syscall2_fn);
+	return sysfn(a1, a2);
+}
+
+static __inline long __syscall3(long n, long a1, long a2, long a3)
+{
+	sysfn_from_fn(__syscall3_fn);
+	return sysfn(a1, a2, a3);
+}
+
+static __inline long __syscall4(long n, long a1, long a2, long a3, long a4)
+{
+	sysfn_from_fn(__syscall4_fn);
+	return sysfn(a1, a2, a3, a4);
+}
+
+static __inline long __syscall5(long n, long a1, long a2, long a3, long a4, long a5)
+{
+	sysfn_from_fn(__syscall5_fn);
+	return sysfn(a1, a2, a3, a4, a5);
+}
+
+static __inline long __syscall6(long n, long a1, long a2, long a3, long a4, long a5, long a6)
+{
+	sysfn_from_fn(__syscall6_fn);
+	return sysfn(a1, a2, a3, a4, a5, a6);
+}
+
+
+#define __SYSCALL_LL_E(x) (x)
+#define __SYSCALL_LL_O(x) (x)
+
+
+#define VDSO_USEFUL
+#define VDSO_CGT_SYM	"__clock_gettime"
+#define VDSO_CGT_VER	"LINUX_2.6"
diff --git a/crt/nt64/Scrt1.c b/crt/nt64/Scrt1.c
new file mode 100644
index 0000000..ff5789f
--- /dev/null
+++ b/crt/nt64/Scrt1.c
@@ -0,0 +1,2 @@
+#define  LIBC_STATIC
+#include "crt1.c"
diff --git a/crt/nt64/crt1.c b/crt/nt64/crt1.c
new file mode 100644
index 0000000..6d22669
--- /dev/null
+++ b/crt/nt64/crt1.c
@@ -0,0 +1,33 @@
+#ifdef LIBC_STATIC
+#define __external_routine
+#else
+#define __external_routine __attribute__((dllimport))
+#endif
+
+#include "psxglue.h"
+
+/**
+ * options: posix session, fallback terminal emulator
+ * x86_64-nt64-midipix-gcc --target-help | grep -A2 posix
+**/
+
+static const int __disabled = 0;
+extern const int __crtopt_posix  __attribute((weak,alias("__disabled")));
+extern const int __crtopt_ttydbg __attribute((weak,alias("__disabled")));
+
+int main();
+
+__external_routine
+__psx_init_routine __psx_init;
+
+__external_routine
+void __libc_entry_routine(void *,void *,int);
+
+void _start(void)
+{
+	__libc_entry_routine(
+		main,
+		__psx_init,
+		__crtopt_posix | __crtopt_ttydbg);
+}
+
diff --git a/crt/nt64/crtdev.c b/crt/nt64/crtdev.c
new file mode 100644
index 0000000..8aa80e6
--- /dev/null
+++ b/crt/nt64/crtdev.c
@@ -0,0 +1,3 @@
+#include "psxglue.h"
+
+const int __crtopt_ttydbg = __PSXOPT_TTYDBG;
diff --git a/crt/nt64/crte.s b/crt/nt64/crte.s
new file mode 100644
index 0000000..9753213
--- /dev/null
+++ b/crt/nt64/crte.s
@@ -0,0 +1,19 @@
+.text
+.globl _so_entry_point
+_so_entry_point:
+	cmp	$0x1,%edx
+	jne	dso_main_routine
+	mov	%edx,%eax
+	ret
+
+__dso_main_routine:
+	ret
+
+	.weak	dso_main_routine
+	.set	dso_main_routine,__dso_main_routine
+
+.section .midipix
+	.quad	dso_main_routine
+	.quad	_so_entry_point
+	.quad	_init
+	.quad	_fini
diff --git a/crt/nt64/crti.s b/crt/nt64/crti.s
new file mode 100644
index 0000000..14fdd90
--- /dev/null
+++ b/crt/nt64/crti.s
@@ -0,0 +1,41 @@
+.text
+.globl _pei386_runtime_relocator
+_pei386_runtime_relocator:
+	ret
+
+.globl _init
+_init:
+	call .init
+	ret
+
+.globl _fini
+_fini:
+	call .fini
+	ret
+
+.section .init
+	xor %rax,%rax
+	push %rax
+	push %rcx
+	push %rdx
+	nop
+	nop
+
+.section .fini
+	xor %rax,%rax
+	push %rax
+	push %rcx
+	push %rdx
+	nop
+	nop
+
+.section .midipix
+	.ascii "e35ed272"
+	.ascii "9e55"
+	.ascii "46c1"
+	.ascii "8251"
+	.ascii "022a59e6c480"
+	.long  0
+	.long  1
+	.long  0
+	.long  0
diff --git a/crt/nt64/crtn.s b/crt/nt64/crtn.s
new file mode 100644
index 0000000..b2c7790
--- /dev/null
+++ b/crt/nt64/crtn.s
@@ -0,0 +1,13 @@
+.section .init
+	pop %rdx
+	pop %rcx
+	pop %r10
+	or  %r10,%rax
+	ret
+
+.section .fini
+	pop %rdx
+	pop %rcx
+	pop %r10
+	or  %r10,%rax
+	ret
diff --git a/crt/nt64/crtposix.c b/crt/nt64/crtposix.c
new file mode 100644
index 0000000..b8e5113
--- /dev/null
+++ b/crt/nt64/crtposix.c
@@ -0,0 +1,3 @@
+#include "psxglue.h"
+
+const int __crtopt_posix = __PSXOPT_POSIX;
diff --git a/musl.lzy b/musl.lzy
new file mode 100644
index 0000000..b3f0f4e
--- /dev/null
+++ b/musl.lzy
@@ -0,0 +1,389 @@
+# lazy mark: project recipe
+lz_project_rules()
+{
+	lz_rules="all install install_no_complex \
+		libc libc_shared libc_static \
+		libc_no_complex libc_shared_no_complex libc_static_no_complex"
+}
+
+
+lz_project_definitions()
+{
+	lz_cflags_common="-std=c99 -pipe -ffreestanding -nostdinc -D_XOPEN_SOURCE=700 -fomit-frame-pointer"
+
+	lz_cflags_include_common="-I$lz_project_dir/src/internal \
+				-I$lz_project_dir/arch/$lz_arch \
+				-I$lz_project_dir/include \
+				-I$lz_build_dir/arch/$lz_arch \
+				-I$lz_build_dir/include"
+
+	musl_empty_lib_names="m rt pthread crypt util xnet resolv dl"
+	musl_cflags_crt="-fPIC"
+	musl_cflags_shared="-fPIC -DSHARED"
+
+	if [ "$lz_pecoff_winnt"x = yesx ]; then
+		pe_excluded_symbols="__libc_entry_point"
+		pe_excluded_symbols="$pe_excluded_symbols,__syscall_vtbl"
+		pe_excluded_symbols="$pe_excluded_symbols,__ldso_vtbl"
+		pe_excluded_symbols="$pe_excluded_symbols,__psx_vtbl"
+		pe_excluded_symbols="$pe_excluded_symbols,__teb_sys_idx"
+		pe_excluded_symbols="$pe_excluded_symbols,__teb_libc_idx"
+		pe_excluded_symbols="$pe_excluded_symbols,__vm_lock_impl"
+		pe_excluded_symbols="$pe_excluded_symbols,__vm_unlock_impl"
+
+		musl_libc_so_ldflags="-shared -e __libc_entry_point -Bsymbolic-functions \
+					--subsystem windows \
+					--output-def $lz_build_dir/lib/libc.so.def \
+					--out-implib $lz_build_dir/lib/libc.lib.a \
+					--exclude-symbols=$pe_excluded_symbols"
+	else
+		musl_libc_so_ldflags="-shared -e _start -Bsymbolic-functions"
+	fi
+
+	musl_libc_src_dirs="src arch/$lz_arch/src arch/$lz_arch/weak"
+	musl_libc_mem_files="src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c"
+
+
+	lz_flag_tests_begin
+
+	for musl_test_flag in "-frounding-math" "-fexcess-precision=standard"; do
+		lz_compiler_supports_flag $lz_c_compiler "$musl_test_flag" \
+			&& lz_cflags_common="$lz_cflags_common $musl_test_flag"
+	done
+
+	for musl_test_flag in "-fno-tree-loop-distribute-patterns"; do
+		lz_compiler_supports_flag $lz_c_compiler "$musl_test_flag" \
+			&& musl_cflags_memops="$musl_cflags_memops $musl_test_flag"
+	done
+
+	for musl_test_flag in "--hash-style=both"; do
+		lz_linker_supports_flag $lz_c_compiler $lz_ld "$musl_test_flag" \
+			&& musl_libc_so_ldflags="$musl_libc_so_ldflags $musl_test_flag"
+	done
+
+	lz_flag_tests_end
+
+
+	if [ "$lz_debug"x = yesx ]; then
+		lz_cflags_debug="$lz_toolchain_cflags_debug"
+	else
+		lz_cflags_common="$lz_cflags_common -Os"
+	fi
+
+	# names of binary files and/or utilities
+	musl_libc_a_name="$lz_build_dir/lib/libc$lz_stlib_ext"
+	musl_libc_so_name="$lz_build_dir/lib/libc$lz_dylib_ext"
+
+	# temporary files to store meta information
+	musl_libc_so_obj_list=libc.so.objs
+	musl_libc_so_src_list=libc.so.src.lst
+
+	musl_libc_a_obj_list=libc.a.objs
+	musl_libc_a_src_list=libc.a.src.lst
+
+	musl_crt_obj_list=crt.objs
+	musl_crt_src_list=crt.src.lst
+
+	musl_install_sh=$lz_project_dir/tools/install.sh
+	musl_ldso="$lz_syslibdir/ld-musl-$lz_arch$lz_subarch.so.1"
+}
+
+
+musl_headers()
+{
+	if [ -f $lz_build_dir/headers.tag ]; then
+		lz_ok && return
+	fi
+
+	mkdir -p $lz_build_dir/include
+	cp -r -t $lz_build_dir/include $lz_project_dir/arch/$lz_arch/bits
+
+	touch $lz_build_dir/headers.tag
+}
+
+
+musl_alltypes()
+{
+	if [ -f $lz_build_dir/alltypes.tag ]; then
+		lz_ok && return
+	fi
+
+	sed -f $lz_project_dir/tools/mkalltypes.sed \
+		$lz_build_dir/include/bits/alltypes.h.in \
+		$lz_project_dir/include/alltypes.h.in > \
+			$lz_build_dir/include/bits/alltypes.h
+
+	touch $lz_build_dir/alltypes.tag
+}
+
+
+musl_version()
+{
+	if [ -f $lz_build_dir/version.tag ]; then
+		lz_ok && return
+	fi
+
+	lz_pushd $lz_project_dir
+	lzp_version=`sh tools/version.sh`
+	lz_popd
+
+	printf '#define VERSION "%s"\n' $lzp_version \
+		> $lz_build_dir/include/version.h
+
+	touch $lz_build_dir/version.tag
+}
+
+
+musl_empty_libs()
+{
+	if [ -f $lz_build_dir/empty_libs.tag ]; then
+		lz_ok && return
+	fi
+
+	for lzp_lib_name in $musl_empty_lib_names; do
+		lzp_lib_file_name=$lz_build_dir/lib/lib$lzp_lib_name.a
+		rm -f $lzp_lib_file_name
+		$lz_ar rc $lzp_lib_file_name
+	done
+
+	touch $lz_build_dir/empty_libs.tag
+}
+
+musl_crt()
+{
+	musl_headers
+	musl_alltypes
+
+	lz_cflags_extra="$musl_cflags_crt"
+	lz_src_dirs="crt"
+
+        lz_compile "$musl_crt_obj_list" "$musl_crt_src_list" "$lz_stobj_ext"
+}
+
+
+musl_libc_common()
+{
+	musl_headers
+	musl_alltypes
+	musl_version
+}
+
+
+musl_libc_shared()
+{
+        musl_libc_common
+	musl_crt
+
+	# memory functions
+	lz_cflags_extra="$musl_cflags_shared"
+	lz_cflags_special="$musl_cflags_memops"
+	lz_src_files="$musl_libc_mem_files"
+	lz_src_dirs=$lz_ignore_src_dirs
+
+        lz_compile "$musl_libc_so_obj_list" "$musl_libc_so_src_list" "$lz_dyobj_ext"
+
+	lz_src_files=
+	lz_cflags_special=
+
+	# regular source files
+	lz_cumulative_obj_list=yes
+	lz_src_dirs=$musl_libc_src_dirs
+	lz_exclude_src_files="$musl_libc_mem_files"
+	lz_compiler_rt_libs="$lz_compiler_rt_libs $lz_link_libgcc"
+
+	if [ "$lz_pecoff_winnt"x = yesx ]; then
+		musl_crti_objs="musl_crti_objs.lst"
+		musl_crtn_objs="musl_crtn_objs.lst"
+		echo 'crt/crti.o' > $musl_crti_objs
+		echo 'crt/crtn.o' > $musl_crtn_objs
+	else
+		musl_crti_objs=
+		musl_crtn_objs=
+	fi
+
+	rm -f "$musl_libc_so_name"
+
+        lz_compile "$musl_libc_so_obj_list" "$musl_libc_so_src_list" "$lz_dyobj_ext"
+        lz_link    "$musl_crti_objs $musl_libc_so_obj_list $musl_crtn_objs" \
+			"$musl_libc_so_src_list" \
+			"$musl_libc_so_name" \
+			"$musl_libc_so_ldflags" \
+			"$lz_compiler_rt_libs"   \
+			"$lz_arch_dynamic_syscall_libs"
+}
+
+
+musl_libc_static()
+{
+        musl_libc_common
+
+	# memory functions
+	lz_cflags_special="$musl_cflags_memops"
+	lz_src_files="$musl_libc_mem_files"
+	lz_src_dirs=$lz_ignore_src_dirs
+
+        lz_compile "$musl_libc_a_obj_list" "$musl_libc_a_src_list" "$lz_stobj_ext"
+	lz_src_files=
+	lz_cflags_special=
+
+	# regular source files
+	lz_cumulative_obj_list=yes
+	lz_src_dirs=$musl_libc_src_dirs
+	lz_exclude_src_files="$musl_libc_mem_files"
+
+	rm -f "$musl_libc_a_name"
+
+        lz_compile "$musl_libc_a_obj_list" "$musl_libc_a_src_list" "$lz_stobj_ext"
+        lz_archive "$musl_libc_a_obj_list" "$musl_libc_a_src_list" "$musl_libc_a_name"
+
+	if [ "$lz_pecoff_winnt"x = yesx ]; then
+		if [ "$lz_arch_dynamic_syscall_libs"x != x ]; then
+			$lz_ar rc "$musl_libc_a_name" "$lz_arch_static_syscall_libs"
+		fi
+	fi
+}
+
+
+musl_libc_shared_no_complex()
+{
+	lz_link_libgcc=
+	lz_exclude_src_dirs="src/complex"
+	musl_libc_shared
+}
+
+
+musl_libc_static_no_complex()
+{
+	lz_exclude_src_dirs="src/complex"
+	musl_libc_static
+}
+
+
+musl_libc()
+{
+	lz_link_libgcc="--as-needed `$lz_c_compiler -print-file-name=libgcc.a`"
+	lz_step musl_crt
+	lz_step musl_libc_shared
+	lz_step musl_libc_static
+	lz_step musl_empty_libs
+}
+
+
+musl_libc_no_complex()
+{
+	lz_step musl_crt
+	lz_step musl_libc_shared_no_complex
+	lz_step musl_libc_static_no_complex
+	lz_step musl_empty_libs
+}
+
+
+musl_all()
+{
+	lz_step musl_libc
+}
+
+
+musl_install_crt()
+{
+	lz_pushd $lz_build_dir/crt
+
+	musl_crt_files=`cat $lz_build_dir/crt.objs`
+
+	for lzp_crt_file in $musl_crt_files; do
+		lzp_crt_obj_file=`basename $lzp_crt_file`
+		$musl_install_sh -D $lzp_crt_obj_file $lz_libdir/$lzp_crt_obj_file
+	done
+
+	lz_popd
+}
+
+
+musl_install_libs()
+{
+	lz_pushd $lz_build_dir/lib
+
+	for lzp_lib_file in "c" $musl_empty_lib_names; do
+		$musl_install_sh -D -m 644 lib$lzp_lib_file$lz_stlib_ext $lz_libdir/lib$lzp_lib_file$lz_stlib_ext
+	done
+
+	$musl_install_sh -D -m 755 libc$lz_dylib_ext $lz_libdir/libc$lz_dylib_ext
+
+	if [ "$lz_pecoff_winnt"x = yesx ]; then
+		# also install the import library
+		$musl_install_sh -D -m 644 libc$lz_implib_ext  $lz_libdir/libc$lz_implib_ext
+	fi
+
+	lz_popd
+}
+
+
+musl_install_ldso()
+{
+	$musl_install_sh -D -l $lz_libdir/libc$lz_dylib_ext $musl_ldso
+	$musl_install_sh -D -l $lz_libdir/libc$lz_dylib_ext $lz_bindir/ldd
+}
+
+
+musl_install_headers()
+{
+	lz_pushd $lz_project_dir/include
+
+	musl_include_files=`find . -type f`
+
+	for lzp_include_file in $musl_include_files; do
+		$musl_install_sh -D -m 644 $lzp_include_file $lz_includedir/$lzp_include_file
+	done
+
+	lz_popd
+}
+
+
+musl_install_arch_headers()
+{
+	lz_pushd $lz_build_dir/include
+
+	musl_include_files=`find ./bits -type f ! -name *.h.in`
+
+	for lzp_include_file in $musl_include_files; do
+		$musl_install_sh -D -m 644 $lzp_include_file $lz_includedir/$lzp_include_file
+	done
+
+	lz_popd
+}
+
+
+musl_install_specs()
+{
+	sh $lz_project_dir/tools/musl-gcc.specs.sh \
+			$(readlink -f "$lz_includedir") \
+			$(readlink -f "$lz_libdir") \
+			$(readlink -f "$musl_ldso") \
+		> $lz_libdir/musl-gcc.specs
+}
+
+
+musl_install_common()
+{
+	lz_step musl_install_crt
+	lz_step musl_install_libs
+	lz_step musl_install_ldso
+	lz_step musl_install_headers
+	lz_step musl_install_arch_headers
+	lz_step musl_install_specs
+}
+
+
+musl_install()
+{
+	lz_step musl_all
+	lz_step musl_install_common
+}
+
+
+musl_install_no_complex()
+{
+	lz_step musl_libc_no_complex
+	lz_step musl_install_common
+}
+
diff --git a/src/env/nt64/__environ.s b/src/env/nt64/__environ.s
new file mode 100644
index 0000000..28ac875
--- /dev/null
+++ b/src/env/nt64/__environ.s
@@ -0,0 +1,11 @@
+.globl	___environ
+.globl	__environ
+.globl	_environ
+.globl	environ
+
+.data
+___environ:
+__environ:
+_environ:
+environ:
+	.quad	0
diff --git a/src/fcntl/nt64/posix_fadvise.c b/src/fcntl/nt64/posix_fadvise.c
new file mode 100644
index 0000000..c95d7f4
--- /dev/null
+++ b/src/fcntl/nt64/posix_fadvise.c
@@ -0,0 +1,14 @@
+#include "fcntl.h"
+#include "syscall_arch.h"
+
+int posix_fadvise (int fd, off_t base, off_t len, int advice)
+{
+	/**
+	 *  __syscall is needed here due to the odd semantics
+	 *  of posix_fadvise(), which for us means calling
+	 *  __sys_fadvise() directly.
+	**/
+
+	return 0; /* __sys_fadvise (fd, base, len, advice); */
+}
+
diff --git a/src/internal/nt64/libc.c b/src/internal/nt64/libc.c
new file mode 100644
index 0000000..43face8
--- /dev/null
+++ b/src/internal/nt64/libc.c
@@ -0,0 +1,7 @@
+#include "../libc.h"
+
+/* todo: teach the linker to export weak symbols */
+#undef  weak_alias
+#define weak_alias(old,new) extern __typeof(old) new __attribute__((alias(#old)))
+
+#include "../libc.c"
diff --git a/src/internal/nt64/syscall.s b/src/internal/nt64/syscall.s
new file mode 100644
index 0000000..ce3827b
--- /dev/null
+++ b/src/internal/nt64/syscall.s
@@ -0,0 +1,5 @@
+.text
+.global	__syscall
+
+__syscall:
+	jmp	__syscall_disp
diff --git a/src/ldso/nt64/dl_iterate_phdr.c b/src/ldso/nt64/dl_iterate_phdr.c
new file mode 100644
index 0000000..f98a509
--- /dev/null
+++ b/src/ldso/nt64/dl_iterate_phdr.c
@@ -0,0 +1,10 @@
+#include <stddef.h>
+#include <dlfcn.h>
+#include <link.h>
+
+typedef int __ldso_phdr_callback(struct dl_phdr_info * info, size_t size, void * data);
+
+int dl_iterate_phdr(__ldso_phdr_callback * callback, void * data)
+{
+	return -1;
+}
diff --git a/src/ldso/nt64/dynlink.c b/src/ldso/nt64/dynlink.c
new file mode 100644
index 0000000..e5329e6
--- /dev/null
+++ b/src/ldso/nt64/dynlink.c
@@ -0,0 +1,58 @@
+#define _BSD_SOURCE
+
+#include <dlfcn.h>
+#include "pthread_impl.h"
+
+int __dladdr(const void * addr, Dl_info * info)
+{
+	return 0;
+}
+
+int __dlinfo(void * dso, int req, void * res)
+{
+	return 0;
+}
+
+void *__dlsym(void * restrict p, const char * restrict s, void * restrict ra)
+{
+	return 0;
+}
+
+void * dlopen(const char * file, int mode)
+{
+	return 0;
+}
+
+int dlclose(void *p)
+{
+        return 0;
+}
+
+char * dlerror(void)
+{
+	return 0;
+}
+
+void __reset_tls(void)
+{
+}
+
+void *__copy_tls(unsigned char * mem)
+{
+	/**
+	 * this is always the simple case, since:
+	 * emutls is based on PE named sections; and
+	 * tls allocation and initialization are handled by clone(2)
+	**/
+
+        pthread_t td;
+        void **	  dtv;
+
+	dtv = (void **)mem;
+	dtv[0] = 0;
+
+	td = (void *)(dtv + 1);
+	td->dtv = dtv;
+
+	return td;
+}
diff --git a/src/ldso/nt64/start.s b/src/ldso/nt64/start.s
new file mode 100644
index 0000000..32dc52f
--- /dev/null
+++ b/src/ldso/nt64/start.s
@@ -0,0 +1,2 @@
+# standard dynamic loader is not required
+# optional dynamic loader [to be] provided by libldso/libpsxscl
diff --git a/src/ldso/nt64/tlsdesc.c b/src/ldso/nt64/tlsdesc.c
new file mode 100644
index 0000000..7015e30
--- /dev/null
+++ b/src/ldso/nt64/tlsdesc.c
@@ -0,0 +1,8 @@
+#include <stddef.h>
+
+ptrdiff_t __tlsdesc_static(void)
+{
+	return 0;
+}
+
+ptrdiff_t  __tlsdesc_dynamic(void) __attribute__((alias("__tlsdesc_static")));
diff --git a/src/setjmp/nt64/longjmp.s b/src/setjmp/nt64/longjmp.s
new file mode 100644
index 0000000..0fcf52e
--- /dev/null
+++ b/src/setjmp/nt64/longjmp.s
@@ -0,0 +1,28 @@
+.text
+.globl	__longjmp
+.globl	_longjmp
+.globl	longjmp
+
+__longjmp:
+_longjmp:
+longjmp:
+	test %edx, %edx		# is val zero?
+	jne  1f			# no:  return val
+	xor  $1,   %edx		# yes: return one
+
+1:
+	mov  %edx, %eax		# return value
+
+2:
+	mov  0x10(%rcx), %rbx	# restore regs
+	mov  0x18(%rcx), %rbp
+	mov  0x20(%rcx), %rdi
+	mov  0x28(%rcx), %rsi
+	mov  0x30(%rcx), %r12
+	mov  0x38(%rcx), %r13
+	mov  0x40(%rcx), %r14
+	mov  0x48(%rcx), %r15
+
+	mov  0x08(%rcx), %rsp	# saved stack pointer
+	mov  (%rcx),     %rdx	# return address
+	jmp  *%rdx		# return
diff --git a/src/setjmp/nt64/setjmp.s b/src/setjmp/nt64/setjmp.s
new file mode 100644
index 0000000..3e8a1ea
--- /dev/null
+++ b/src/setjmp/nt64/setjmp.s
@@ -0,0 +1,23 @@
+.text
+.globl	__setjmp
+.globl	_setjmp
+.globl	setjmp
+
+__setjmp:
+_setjmp:
+setjmp:
+	pop  (%rcx)		# return address
+	mov  %rsp, 0x08(%rcx)	# caller's stack pointer
+	push (%rcx)		# restore own stack pointer
+
+	mov  %rbx, 0x10(%rcx)
+	mov  %rbp, 0x18(%rcx)
+	mov  %rdi, 0x20(%rcx)
+	mov  %rsi, 0x28(%rcx)
+	mov  %r12, 0x30(%rcx)
+	mov  %r13, 0x38(%rcx)
+	mov  %r14, 0x40(%rcx)
+	mov  %r15, 0x48(%rcx)
+
+	xor %eax,  %eax
+	ret
diff --git a/src/thread/nt64/__set_thread_area.c b/src/thread/nt64/__set_thread_area.c
new file mode 100644
index 0000000..c50f6c6
--- /dev/null
+++ b/src/thread/nt64/__set_thread_area.c
@@ -0,0 +1,13 @@
+#include <errno.h>
+#include "pthread_impl.h"
+
+int __set_thread_area(void * p)
+{
+	struct pthread ** ptlca;
+
+	ptlca = __psx_tlca();
+	if (!ptlca) return -ESRCH;
+
+	*ptlca = p;
+	return 0;
+}
diff --git a/src/thread/nt64/__tls_get_addr.c b/src/thread/nt64/__tls_get_addr.c
new file mode 100644
index 0000000..ad8d845
--- /dev/null
+++ b/src/thread/nt64/__tls_get_addr.c
@@ -0,0 +1,2 @@
+/* using a custom, register-based __emutls_get_address */
+typedef int dummy;
diff --git a/src/thread/nt64/clone.c b/src/thread/nt64/clone.c
new file mode 100644
index 0000000..d460855
--- /dev/null
+++ b/src/thread/nt64/clone.c
@@ -0,0 +1,62 @@
+#include <syscall.h>
+
+struct pt_regs {
+	unsigned long	r15;
+	unsigned long	r14;
+	unsigned long	r13;
+	unsigned long	r12;
+	unsigned long	rbp;
+	unsigned long	rbx;
+	unsigned long	r11;
+	unsigned long	r10;
+	unsigned long	r9;
+	unsigned long	r8;
+	unsigned long	rax;
+	unsigned long	rcx;
+	unsigned long	rdx;
+	unsigned long	rsi;
+	unsigned long	rdi;
+	unsigned long	orig_rax;
+	unsigned long	rip;
+	unsigned long	cs;
+	unsigned long	eflags;
+	unsigned long	rsp;
+	unsigned long	ss;
+};
+
+typedef long __sys_clone(
+	unsigned long	flags,
+	void *		child_stack,
+	void *		ptid,
+	void *		ctid,
+	struct pt_regs *regs);
+
+typedef int __entry_point(void *);
+
+extern unsigned long ** __syscall_vtbl;
+
+int __clone(
+	__entry_point *	fn,
+	void *		child_stack,
+	int		flags,
+	void *		arg,
+	int *		ptid,
+	void *		pthread_self_addr,
+	int *		ctid)
+{
+	struct pt_regs	regs;
+	__sys_clone *	pfn_clone;
+
+	regs.rip = (unsigned long)fn;
+	regs.rcx = (unsigned long)arg;
+	regs.rdx = (unsigned long)pthread_self_addr;
+
+	pfn_clone = (__sys_clone *)(__syscall_vtbl[SYS_clone]);
+
+	return (int)pfn_clone(
+		flags,
+		child_stack,
+		ptid,
+		ctid,
+		&regs);
+}
diff --git a/src/thread/nt64/pthread_detach.c b/src/thread/nt64/pthread_detach.c
new file mode 100644
index 0000000..85db4cb
--- /dev/null
+++ b/src/thread/nt64/pthread_detach.c
@@ -0,0 +1,6 @@
+#include "../pthread_detach.c"
+
+int __pthread_detach_impl(pthread_t t)
+{
+	return thrd_detach(t);
+}
diff --git a/src/thread/nt64/pthread_equal.c b/src/thread/nt64/pthread_equal.c
new file mode 100644
index 0000000..a8fcd79
--- /dev/null
+++ b/src/thread/nt64/pthread_equal.c
@@ -0,0 +1,6 @@
+#include "../pthread_equal.c"
+
+int __pthread_equal_impl(pthread_t a, pthread_t b)
+{
+	return thrd_equal(a,b);
+}
diff --git a/src/thread/nt64/pthread_self.c b/src/thread/nt64/pthread_self.c
new file mode 100644
index 0000000..23fbc53
--- /dev/null
+++ b/src/thread/nt64/pthread_self.c
@@ -0,0 +1,10 @@
+#include "pthread_impl.h"
+#include <threads.h>
+#include "libc.h"
+
+pthread_t pthread_self()
+{
+	return __pthread_self();
+}
+
+weak_alias(pthread_self, thrd_current);
diff --git a/src/thread/nt64/syscall_cp.s b/src/thread/nt64/syscall_cp.s
new file mode 100644
index 0000000..b8b7039
--- /dev/null
+++ b/src/thread/nt64/syscall_cp.s
@@ -0,0 +1,29 @@
+.text
+.globl	__syscall_cp_asm
+.globl	__cp_begin
+.globl	__cp_end
+
+__syscall_cp_asm:
+__cp_begin:
+	movq	(%rcx),	%rcx	/* check content of ptr */
+	test	%ecx,	%ecx
+	jnz	__cancel	/* thread is pending cancellation */
+
+	movq	%rdx,	    %rcx/* move water     */
+	movq	%r8,	    %rdx/* from one glass */
+	movq	%r9,	    %r8 /* to another     */
+	movq	0x28(%rsp), %r9
+
+	movq	0x30(%rsp),%rax
+	movq	%rax,	   0x28(%rsp)
+
+	movq	0x38(%rsp),%r10
+	movq	%r10,	   0x30(%rsp)
+
+	movq	0x40(%rsp),%r10
+	movq	%r10,	   0x38(%rsp)
+
+	jmp	__syscall
+
+__cp_end:
+	ret
-- 
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