h8300 updates from Yoshinori Sato

1 files changed, 147 insertions, 9 deletions

diff --git a/libc/sysdeps/linux/h8300/bits/syscalls.h b/libc/sysdeps/linux/h8300/bits/syscalls.h
index 62541b873..b734a6251 100644
--- a/libc/sysdeps/linux/h8300/bits/syscalls.h
+++ b/libc/sysdeps/linux/h8300/bits/syscalls.h
@@ -1,19 +1,157 @@
-#ifndef _BITS_SYSCALLS_H
-#define _BITS_SYSCALLS_H
+/* Unlike the asm/unistd.h kernel header file (which this is partly based on),
+ * this file must be able to cope with PIC and non-PIC code.  For some arches
+ * there is no difference.  For x86 (which has far too few registers) there is
+ * a difference.   Regardless, including asm/unistd.h is hereby officially
+ * forbidden.  Don't do it.  It is bad for you. 
+ */ 
 #ifndef _SYSCALL_H
 # error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
 #endif
 
-#include <features.h>
-
-/* Do something very evil for now.  Until we create our own syscall
- * macros, short circuit bits/sysnum.h  and use asm/unistd.h instead */
-#include <asm/unistd.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/sysnum.h>
 
-#endif /* _BITS_SYSCALLS_H */
+
+#define __syscall_return(type, res) \
+do { \
+	if ((unsigned long)(res) >= (unsigned long)(-125)) { \
+	/* avoid using res which is declared to be in register d0; \
+	   errno might expand to a function call and clobber it.  */ \
+		int __err = -(res); \
+		errno = __err; \
+		res = -1; \
+	} \
+	return (type) (res); \
+} while (0)
+
+#define _syscall0(type, name)							\
+type name(void)									\
+{										\
+  register long __res __asm__("er0");						\
+  __asm__ __volatile__ ("mov.l	%1,er0\n\t"					\
+  			"trapa	#0\n\t"						\
+			: "=r" (__res)						\
+			: "ir" (__NR_##name)					\
+			: "cc");						\
+  if ((unsigned long)(__res) >= (unsigned long)(-125)) {			\
+    errno = -__res;								\
+    __res = -1;									\
+  }										\
+  return (type)__res;								\
+}
+
+#define _syscall1(type, name, atype, a)						\
+type name(atype a)								\
+{										\
+  register long __res __asm__("er0");						\
+  __asm__ __volatile__ ("mov.l	%2, er1\n\t"					\
+  			"mov.l	%1, er0\n\t"					\
+  			"trapa	#0\n\t"						\
+			: "=r" (__res)						\
+			: "ir" (__NR_##name),					\
+			  "g" ((long)a)						\
+			: "cc", "er1");					\
+  if ((unsigned long)(__res) >= (unsigned long)(-125)) {			\
+    errno = -__res;								\
+    __res = -1;									\
+  }										\
+  return (type)__res;								\
+}
+
+#define _syscall2(type, name, atype, a, btype, b)				\
+type name(atype a, btype b)							\
+{										\
+  register long __res __asm__("er0");						\
+  __asm__ __volatile__ ("mov.l	%3, er2\n\t"					\
+  			"mov.l	%2, er1\n\t"					\
+			"mov.l	%1, er0\n\t"					\
+  			"trapa	#0\n\t"						\
+			: "=r" (__res)						\
+			: "ir" (__NR_##name),					\
+			  "g" ((long)a),					\
+			  "g" ((long)b)						\
+			: "cc", "er1", "er2"); 				\
+  if ((unsigned long)(__res) >= (unsigned long)(-125)) {			\
+    errno = -__res;								\
+    __res = -1;									\
+  }										\
+  return (type)__res;								\
+}
+
+#define _syscall3(type, name, atype, a, btype, b, ctype, c)			\
+type name(atype a, btype b, ctype c)						\
+{										\
+  register long __res __asm__("er0");						\
+  __asm__ __volatile__ ("mov.l	%4, er3\n\t"					\
+			"mov.l	%3, er2\n\t"					\
+  			"mov.l	%2, er1\n\t"					\
+			"mov.l	%1, er0\n\t"					\
+  			"trapa	#0\n\t"						\
+			: "=r" (__res)						\
+			: "ir" (__NR_##name),					\
+			  "g" ((long)a),					\
+			  "g" ((long)b),					\
+			  "g" ((long)c)						\
+			: "cc", "er1", "er2", "er3");  			\
+  if ((unsigned long)(__res) >= (unsigned long)(-125)) {			\
+    errno = -__res;								\
+    __res = -1;									\
+  }										\
+  return (type)__res;								\
+}
+
+#define _syscall4(type, name, atype, a, btype, b, ctype, c, dtype, d)		\
+type name(atype a, btype b, ctype c, dtype d)					\
+{										\
+  register long __res __asm__("er0");						\
+  __asm__ __volatile__ ("mov.l	%5, er4\n\t"					\
+			"mov.l	%4, er3\n\t"					\
+			"mov.l	%3, er2\n\t"					\
+  			"mov.l	%2, er1\n\t"					\
+			"mov.l	%1, er0\n\t"					\
+  			"trapa	#0\n\t"						\
+			: "=r" (__res)						\
+			: "ir" (__NR_##name),					\
+			  "g" ((long)a),					\
+			  "g" ((long)b),					\
+			  "g" ((long)c),					\
+			  "g" ((long)d)						\
+			: "cc", "er1", "er2", "er3", "er4");			\
+  if ((unsigned long)(__res) >= (unsigned long)(-125)) {			\
+    errno = -__res;								\
+    __res = -1;									\
+  }										\
+  return (type)__res;								\
+}
+
+#define _syscall5(type, name, atype, a, btype, b, ctype, c, dtype, d, etype, e)	\
+type name(atype a, btype b, ctype c, dtype d, etype e)				\
+{										\
+  register long __res __asm__("er0");						\
+  __asm__ __volatile__ ( \
+                        "mov.l  er5,@-sp\n\t"                                   \
+			"mov.l	%5, er4\n\t"					\
+			"mov.l	%4, er3\n\t"					\
+			"mov.l	%3, er2\n\t"					\
+  			"mov.l	%2, er1\n\t"					\
+			"mov.l	%1, er0\n\t"					\
+			"mov.l	%6, er5\n\t"					\
+  			"trapa	#0\n\t"						\
+                       "mov.l  @sp+,er5\n\t"                                   \
+			: "=r" (__res)						\
+			: "ir" (__NR_##name),					\
+			  "g" ((long)a),					\
+			  "g" ((long)b),					\
+			  "g" ((long)c),					\
+			  "g" ((long)d),					\
+			  "m" ((long)e)						\
+			: "cc", "er1", "er2", "er3", "er4");		        \
+  if ((unsigned long)(__res) >= (unsigned long)(-125)) {		       	\
+    errno = -__res;								\
+    __res = -1;									\
+  }										\
+  return (type)__res;								\
+}