add arm64 (aarch64) support

The libaio.h changes came from Riku Voipio <riku.voipio@linaro.org>.
The syscall-arm64.h file is an adapter version of the syscall-arm.h
file.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>

3 files changed, 113 insertions, 0 deletions

diff --git a/src/libaio.h b/src/libaio.h
index 18dbc2a..c03ff9c 100644
--- a/src/libaio.h
+++ b/src/libaio.h
@@ -91,6 +91,16 @@ typedef enum io_iocb_cmd {
 #define PADDED(x, y)    unsigned y; x
 #define PADDEDptr(x, y) unsigned y; x
 #define PADDEDul(x, y)  unsigned y; unsigned long x
+#elif defined(__aarch64__)
+#  if defined (__AARCH64EB__) /* big endian, 64 bits */
+#define PADDED(x, y)    unsigned y; x
+#define PADDEDptr(x,y)  x
+#define PADDEDul(x, y)  unsigned long x
+#  elif defined(__AARCH64EL__) /* little endian, 64 bits */
+#define PADDED(x, y)    x, y
+#define PADDEDptr(x, y) x
+#define PADDEDul(x, y)  unsigned long x
+#  endif
 #else
 #error	endian?
 #endif
diff --git a/src/syscall-arm64.h b/src/syscall-arm64.h
new file mode 100644
index 0000000..031c571
--- /dev/null
+++ b/src/syscall-arm64.h
@@ -0,0 +1,101 @@
+/*
+ *  linux/include/asm-arm/unistd.h
+ *
+ *  Copyright (C) 2001-2005 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Please forward _all_ changes to this file to rmk@arm.linux.org.uk,
+ * no matter what the change is.  Thanks!
+ */
+
+#define __NR_io_setup			0
+#define __NR_io_destroy			1
+#define __NR_io_submit			2
+#define __NR_io_cancel			3
+#define __NR_io_getevents		4
+
+#define __sys2(x) #x
+#define __sys1(x) __sys2(x)
+
+#define __SYS_REG(name) register long __sysreg __asm__("w8") = __NR_##name;
+#define __SYS_REG_LIST(regs...) "r" (__sysreg) , ##regs
+#define __syscall(name) "svc\t#0"
+
+#define io_syscall1(type,fname,sname,type1,arg1)			\
+type fname(type1 arg1) {						\
+  __SYS_REG(sname)							\
+  register long __x0 __asm__("x0") = (long)arg1;			\
+  register long __res_x0 __asm__("x0");					\
+  __asm__ __volatile__ (						\
+  __syscall(sname)							\
+	: "=r" (__res_x0)						\
+	: __SYS_REG_LIST( "0" (__x0) )					\
+	: "memory" );							\
+  return (type) __res_x0;						\
+}
+
+#define io_syscall2(type,fname,sname,type1,arg1,type2,arg2)		\
+type fname(type1 arg1,type2 arg2) {					\
+  __SYS_REG(sname)							\
+  register long __x0 __asm__("x0") = (long)arg1;			\
+  register long __x1 __asm__("x1") = (long)arg2;			\
+  register long __res_x0 __asm__("x0");					\
+  __asm__ __volatile__ (						\
+  __syscall(sname)							\
+	: "=r" (__res_x0)						\
+	: __SYS_REG_LIST( "0" (__x0), "r" (__x1) )			\
+	: "memory" );							\
+  return (type) __res_x0;						\
+}
+
+#define io_syscall3(type,fname,sname,type1,arg1,type2,arg2,type3,arg3)	\
+type fname(type1 arg1,type2 arg2,type3 arg3) {				\
+  __SYS_REG(sname)							\
+  register long __x0 __asm__("x0") = (long)arg1;			\
+  register long __x1 __asm__("x1") = (long)arg2;			\
+  register long __x2 __asm__("x2") = (long)arg3;			\
+  register long __res_x0 __asm__("x0");					\
+  __asm__ __volatile__ (						\
+  __syscall(sname)							\
+	: "=r" (__res_x0)						\
+	: __SYS_REG_LIST( "0" (__x0), "r" (__x1), "r" (__x2) )		\
+	: "memory" );							\
+  return (type) __res_x0;						\
+}
+
+#define io_syscall4(type,fname,sname,type1,arg1,type2,arg2,type3,arg3,type4,arg4)\
+type fname(type1 arg1, type2 arg2, type3 arg3, type4 arg4) {		\
+  __SYS_REG(sname)							\
+  register long __x0 __asm__("x0") = (long)arg1;			\
+  register long __x1 __asm__("x1") = (long)arg2;			\
+  register long __x2 __asm__("x2") = (long)arg3;			\
+  register long __x3 __asm__("x3") = (long)arg4;			\
+  register long __res_x0 __asm__("x0");					\
+  __asm__ __volatile__ (						\
+  __syscall(sname)							\
+	: "=r" (__res_x0)						\
+	: __SYS_REG_LIST( "0" (__x0), "r" (__x1), "r" (__x2), "r" (__x3) ) \
+	: "memory" );							\
+  return (type) __res_x0;						\
+}
+
+#define io_syscall5(type,fname,sname,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5)	\
+type fname(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) {\
+  __SYS_REG(sname)							\
+  register long __x0 __asm__("x0") = (long)arg1;			\
+  register long __x1 __asm__("x1") = (long)arg2;			\
+  register long __x2 __asm__("x2") = (long)arg3;			\
+  register long __x3 __asm__("x3") = (long)arg4;			\
+  register long __x4 __asm__("x4") = (long)arg5;			\
+  register long __res_x0 __asm__("x0");					\
+  __asm__ __volatile__ (						\
+  __syscall(sname)							\
+	: "=r" (__res_x0)						\
+	: __SYS_REG_LIST( "0" (__x0), "r" (__x1), "r" (__x2),		\
+			  "r" (__x3), "r" (__x4) )			\
+	: "memory" );							\
+  return (type) __res_x0;						\
+}
diff --git a/src/syscall.h b/src/syscall.h
index 62879a5..6ece660 100644
--- a/src/syscall.h
+++ b/src/syscall.h
@@ -26,6 +26,8 @@
 #include "syscall-arm.h"
 #elif defined(__sparc__)
 #include "syscall-sparc.h"
+#elif defined(__aarch64__)
+#include "syscall-arm64.h"
 #else
 #error "add syscall-arch.h"
 #endif