I reworked syscalls.h to match how I'm doing other arches. Stefan Allius and

Edie C. Dost has some concerns about the perl script used to general crti.o and
crtn.o and added their own versions.  These versions will win since they are
built last,

libc/sysdeps/linux/sh/Makefile

@@ -45,7 +45,7 @@ all: $(OBJS) $(LIBC)
 
 $(LIBC): ar-target 
 
-ar-target: $(OBJS) $(CRT0_OBJ)
+ar-target: $(OBJS) $(CRT0_OBJ) $(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o
 	$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
 	cp $(CRT0_OBJ) $(TOPDIR)lib/$(CRT0_OBJ)
 
@@ -53,6 +53,20 @@ $(CRT0_OBJ): %.o : %.S
 	$(CC) $(SFLAGS) -c $< -o $@
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
+crti.o: crti.S
+	$(CC) $(SAFECFLAGS) -c crti.S -o crti.o
+
+$(TOPDIR)lib/crti.o: crti.o
+	mkdir -p $(TOPDIR)lib/
+	cp crti.o $(TOPDIR)lib/
+
+crtn.o: crtn.S
+	$(CC) $(SAFECFLAGS) -c crtn.S -o crtn.o
+
+$(TOPDIR)lib/crtn.o: crtn.o
+	mkdir -p $(TOPDIR)lib/
+	cp crtn.o $(TOPDIR)lib/
+
 $(SOBJS): %.o : %.S
 	$(CC) $(SFLAGS) -c $< -o $@
 	$(STRIPTOOL) -x -R .note -R .comment $*.o

libc/sysdeps/linux/sh/bits/syscalls.h

@@ -4,12 +4,136 @@
 # error "Never use <bits/syscall.h> directly; include <sys/syscall.h> instead."
 #endif
 
-#include <features.h>
+/* 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/syscall.h>
 
-/* Do something very evil for now.  Until we create our own syscall
- * macros, short circuit bits/syscall.h  and use asm/unistd.h instead */
-#define _BITS_SYSCALL_H
-#include <asm/unistd.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-sh/errno.h> */
+#define __syscall_return(type, res) \
+do { \
+	if ((unsigned long)(res) >= (unsigned long)(-125)) { \
+	/* Avoid using "res" which is declared to be in register r0; \
+	   errno might expand to a function call and clobber it.  */ \
+		int __err = -(res); \
+		__set_errno = __err; \
+		res = -1; \
+	} \
+	return (type) (res); \
+} while (0)
+
+/* XXX - _foo needs to be __foo, while __NR_bar could be _NR_bar. */
+#define _syscall0(type,name) \
+type name(void) \
+{ \
+register long __sc0 __asm__ ("r3") = __NR_##name; \
+__asm__ __volatile__ ("trapa	#0x10" \
+	: "=z" (__sc0) \
+	: "0" (__sc0) \
+	: "memory" ); \
+__syscall_return(type,__sc0); \
+}
+
+#define _syscall1(type,name,type1,arg1) \
+type name(type1 arg1) \
+{ \
+register long __sc0 __asm__ ("r3") = __NR_##name; \
+register long __sc4 __asm__ ("r4") = (long) arg1; \
+__asm__ __volatile__ ("trapa	#0x11" \
+	: "=z" (__sc0) \
+	: "0" (__sc0), "r" (__sc4) \
+	: "memory"); \
+__syscall_return(type,__sc0); \
+}
+
+#define _syscall2(type,name,type1,arg1,type2,arg2) \
+type name(type1 arg1,type2 arg2) \
+{ \
+register long __sc0 __asm__ ("r3") = __NR_##name; \
+register long __sc4 __asm__ ("r4") = (long) arg1; \
+register long __sc5 __asm__ ("r5") = (long) arg2; \
+__asm__ __volatile__ ("trapa	#0x12" \
+	: "=z" (__sc0) \
+	: "0" (__sc0), "r" (__sc4), "r" (__sc5) \
+	: "memory"); \
+__syscall_return(type,__sc0); \
+}
+
+#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
+type name(type1 arg1,type2 arg2,type3 arg3) \
+{ \
+register long __sc0 __asm__ ("r3") = __NR_##name; \
+register long __sc4 __asm__ ("r4") = (long) arg1; \
+register long __sc5 __asm__ ("r5") = (long) arg2; \
+register long __sc6 __asm__ ("r6") = (long) arg3; \
+__asm__ __volatile__ ("trapa	#0x13" \
+	: "=z" (__sc0) \
+	: "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6) \
+	: "memory"); \
+__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 long __sc0 __asm__ ("r3") = __NR_##name; \
+register long __sc4 __asm__ ("r4") = (long) arg1; \
+register long __sc5 __asm__ ("r5") = (long) arg2; \
+register long __sc6 __asm__ ("r6") = (long) arg3; \
+register long __sc7 __asm__ ("r7") = (long) arg4; \
+__asm__ __volatile__ ("trapa	#0x14" \
+	: "=z" (__sc0) \
+	: "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6),  \
+	  "r" (__sc7) \
+	: "memory" ); \
+__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 long __sc3 __asm__ ("r3") = __NR_##name; \
+register long __sc4 __asm__ ("r4") = (long) arg1; \
+register long __sc5 __asm__ ("r5") = (long) arg2; \
+register long __sc6 __asm__ ("r6") = (long) arg3; \
+register long __sc7 __asm__ ("r7") = (long) arg4; \
+register long __sc0 __asm__ ("r0") = (long) arg5; \
+__asm__ __volatile__ ("trapa	#0x15" \
+	: "=z" (__sc0) \
+	: "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6), "r" (__sc7),  \
+	  "r" (__sc3) \
+	: "memory" ); \
+__syscall_return(type,__sc0); \
+}
+
+/* Add in _syscall6 which is not in the kernel header */
+#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 long __sc3 __asm__ ("r3") = __NR_##name; \
+register long __sc4 __asm__ ("r4") = (long) arg1; \
+register long __sc5 __asm__ ("r5") = (long) arg2; \
+register long __sc6 __asm__ ("r6") = (long) arg3; \
+register long __sc7 __asm__ ("r7") = (long) arg4; \
+register long __sc0 __asm__ ("r0") = (long) arg5; \
+register long __sc1 __asm__ ("r1") = (long) arg6; \
+__asm__ __volatile__ ("trapa	#0x15" \
+	: "=z" (__sc0) \
+	: "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6), "r" (__sc7), \
+	  "r" (__sc3), "r" (__sc1) \
+	: "memory" ); \
+__syscall_return(type,__sc0); \
+}
 
+#endif /* __ASSEMBLER__ */
 #endif /* _BITS_SYSCALLS_H */
 

libc/sysdeps/linux/sh/crt0.S

@@ -42,49 +42,38 @@
 		...
 					NULL
 */
-
 	.text
 	.globl _start
-	
+	.type _start,@function
+	.size _start,_start_end - _start
 _start:
-	/* Clear the frame pointer since this is the outermost frame.  */
+	/* Clear the frame pointer since this is the outermost frame. (in delay slot) */
 	mov #0, r14
 
 	/* Pop argc off the stack and save a pointer to argv */
 	mov.l @r15+,r4
 	mov r15, r5
 
-	/* set up the value for the environment pointer
-	   r6 = (argc+1)*4+argv
-	*/
+	/*
+	 * Setup the value for the environment pointer:
+	 * r6 = (argc + 1) * 4
+	 * r6 += argv (in delay slot)
+	 */
 	mov r4,r6
 	add #1,r6
 	shll2 r6
-	add r5,r6
-
-	!			Clear BSS area
-	mov.l	3f, r1
-	add	#4, r1
-	mov.l	4f, r2
-	mov	#0, r0
-9:	cmp/hs	r2, r1
-	bf/s	9b		! while (r1 < r2)
-	 mov.l	r0,@-r2
 
 	/* call main */
-	mov.l L_main,r1
-	jsr @r1
-	nop
+	mov.l L_main, r0
+	jsr @r0
 
-	/* should never get here....*/
-	mov.l L_abort,r1
-	jsr @r1
+	/* We should not get here. */
+	mov.l L_abort, r0
+	jsr @r0
 	nop
-
+_start_end:	
 	.align	2
 
-3:	.long	__bss_start
-4:	.long	_end
 
 L_main:
 	.long	__uClibc_main

libc/sysdeps/linux/sh/crti.S

@@ -0,0 +1,22 @@
+	.file	"crti.S"
+
+	.section .init
+	.align	2
+	.global	_init
+	.hidden _init
+	.type	_init,@function
+_init:
+	mov.l	r14,@-r15
+	sts.l	pr,@-r15
+	mov	r15,r14
+
+	.section .fini
+	.align	2
+	.global	_fini
+	.hidden _fini
+	.type	_fini,@function
+_fini:
+	mov.l	r14,@-r15
+	sts.l	pr,@-r15
+	mov	r15,r14
+

libc/sysdeps/linux/sh/crtn.S

@@ -0,0 +1,17 @@
+	.file	"crtn.S"
+
+	.section .init
+	mov	r14,r15
+	lds.l	@r15+,pr
+	rts	
+	mov.l	@r15+,r14
+.Lfe1:
+	.size	_init,.Lfe1-_init
+
+	.section .fini
+	mov	r14,r15
+	lds.l	@r15+,pr
+	rts	
+	mov.l	@r15+,r14
+.Lfe2:
+	.size	_fini,.Lfe2-_fini