Patch from Paul Mundt adding uClibc sh64 support:

Here's a patch that implements the beginnings of a rudimentary sh64 port. So
far, this only works static, as I haven't done any of the ldso work yet. I've
also not touched the libpthread stuff yet either, so that's also disabled for
now.

This port was based off of some work that Sean McGoogan at SuperH did for his
initial port, but the this patch doesn't carry over too much from there
(basically the libc/sysdeps/linux/sh64/Makefile (or rather, parts of it),
the setjmp/longjmp stuff (which I had to rewrite portions of it to work with
the new toolchains), etc.).

However, for static, everything appears to work correcly, at least in a hello
world type application.

1 files changed, 134 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/sh64/bits/syscalls.h b/libc/sysdeps/linux/sh64/bits/syscalls.h
new file mode 100644
index 000000000..e6190303a
--- /dev/null
+++ b/libc/sysdeps/linux/sh64/bits/syscalls.h
@@ -0,0 +1,134 @@
+#ifndef _BITS_SYSCALLS_H
+#define _BITS_SYSCALLS_H
+#ifndef _SYSCALL_H
+# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
+#endif
+
+/* This includes the `__NR_<name>' syscall numbers taken from the Linux kernel
+ * header files.  It also defines the traditional `SYS_<name>' macros for older
+ * programs.  */
+#include <bits/sysnum.h>
+
+#ifndef __set_errno
+# define __set_errno(val) (*__errno_location ()) = (val)
+#endif
+#ifndef SYS_ify
+# define SYS_ify(syscall_name)  (__NR_##syscall_name)
+#endif
+
+#ifndef __ASSEMBLER__
+
+/* user-visible error numbers are in the range -1 - -125: see <asm-sh64/errno.h> */
+#define __syscall_return(type, res) \
+do { \
+	/* Note: when returning from kernel the return value is in r9	    \
+	**       This prevents conflicts between return value and arg1      \
+	**       when dispatching signal handler, in other words makes	    \
+	**       life easier in the system call epilogue (see entry.S)      \
+	*/								    \
+        register unsigned long __sr2 __asm__ ("r2") = res;		    \
+	if ((unsigned long)(res) >= (unsigned long)(-125)) { \
+		errno = -(res);						    \
+		__sr2 = -1; 						    \
+	} \
+	return (type) (__sr2); 						    \
+} while (0)
+
+/* XXX - _foo needs to be __foo, while __NR_bar could be _NR_bar. */
+
+#define _syscall0(type,name) \
+type name(void) \
+{ \
+register unsigned long __sc0 __asm__ ("r9") = ((0x10 << 16) | __NR_##name); \
+__asm__ __volatile__ ("trapa	%1" \
+	: "=r" (__sc0) 							    \
+	: "r" (__sc0) ); 						    \
+__syscall_return(type,__sc0); 						    \
+}
+
+#define _syscall1(type,name,type1,arg1) \
+type name(type1 arg1) \
+{ \
+register unsigned long __sc0 __asm__ ("r9") = ((0x11 << 16) | __NR_##name); \
+register unsigned long __sc2 __asm__ ("r2") = (unsigned long) arg1;	    \
+__asm__ __volatile__ ("trapa	%1" \
+	: "=r" (__sc0) 							    \
+	: "r" (__sc0), "r" (__sc2));					    \
+__syscall_return(type,__sc0); 						    \
+}
+
+#define _syscall2(type,name,type1,arg1,type2,arg2) \
+type name(type1 arg1,type2 arg2) \
+{ \
+register unsigned long __sc0 __asm__ ("r9") = ((0x12 << 16) | __NR_##name); \
+register unsigned long __sc2 __asm__ ("r2") = (unsigned long) arg1;	    \
+register unsigned long __sc3 __asm__ ("r3") = (unsigned long) arg2;	    \
+__asm__ __volatile__ ("trapa	%1" \
+	: "=r" (__sc0) 							    \
+	: "r" (__sc0), "r" (__sc2), "r" (__sc3) );			    \
+__syscall_return(type,__sc0); 						    \
+}
+
+#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
+type name(type1 arg1,type2 arg2,type3 arg3) \
+{ \
+register unsigned long __sc0 __asm__ ("r9") = ((0x13 << 16) | __NR_##name); \
+register unsigned long __sc2 __asm__ ("r2") = (unsigned long) arg1;	    \
+register unsigned long __sc3 __asm__ ("r3") = (unsigned long) arg2;	    \
+register unsigned long __sc4 __asm__ ("r4") = (unsigned long) arg3;	    \
+__asm__ __volatile__ ("trapa	%1" \
+	: "=r" (__sc0) 							    \
+	: "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4) );		    \
+__syscall_return(type,__sc0); 						    \
+}
+
+#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
+type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4) \
+{ \
+register unsigned long __sc0 __asm__ ("r9") = ((0x14 << 16) | __NR_##name); \
+register unsigned long __sc2 __asm__ ("r2") = (unsigned long) arg1;	    \
+register unsigned long __sc3 __asm__ ("r3") = (unsigned long) arg2;	    \
+register unsigned long __sc4 __asm__ ("r4") = (unsigned long) arg3;	    \
+register unsigned long __sc5 __asm__ ("r5") = (unsigned long) arg4;	    \
+__asm__ __volatile__ ("trapa	%1" \
+	: "=r" (__sc0) 							    \
+	: "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4), "r" (__sc5) );\
+__syscall_return(type,__sc0); 						    \
+}
+
+#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
+type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) \
+{ \
+register unsigned long __sc0 __asm__ ("r9") = ((0x15 << 16) | __NR_##name); \
+register unsigned long __sc2 __asm__ ("r2") = (unsigned long) arg1;	    \
+register unsigned long __sc3 __asm__ ("r3") = (unsigned long) arg2;	    \
+register unsigned long __sc4 __asm__ ("r4") = (unsigned long) arg3;	    \
+register unsigned long __sc5 __asm__ ("r5") = (unsigned long) arg4;	    \
+register unsigned long __sc6 __asm__ ("r6") = (unsigned long) arg5;	    \
+__asm__ __volatile__ ("trapa	%1" \
+	: "=r" (__sc0) 							    \
+	: "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4), "r" (__sc5), \
+	  "r" (__sc6));							    \
+__syscall_return(type,__sc0); 						    \
+}
+
+#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5, type6, arg6) \
+type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5, type6 arg6) \
+{ \
+register unsigned long __sc0 __asm__ ("r9") = ((0x16 << 16) | __NR_##name); \
+register unsigned long __sc2 __asm__ ("r2") = (unsigned long) arg1;	    \
+register unsigned long __sc3 __asm__ ("r3") = (unsigned long) arg2;	    \
+register unsigned long __sc4 __asm__ ("r4") = (unsigned long) arg3;	    \
+register unsigned long __sc5 __asm__ ("r5") = (unsigned long) arg4;	    \
+register unsigned long __sc6 __asm__ ("r6") = (unsigned long) arg5;	    \
+register unsigned long __sc7 __asm__ ("r7") = (unsigned long) arg6;	    \
+__asm__ __volatile__ ("trapa	%1" \
+	: "=r" (__sc0) 							    \
+	: "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4), "r" (__sc5), \
+	  "r" (__sc6), "r" (__sc7));					    \
+__syscall_return(type,__sc0); 						    \
+}
+
+#endif /* __ASSEMBLER__ */
+#endif /* _BITS_SYSCALLS_H */
+