Rework syscall handling. Rewrite syscall handlers for x86 and ARM.

Prepare to kill the UNIFIED_SYSCALL option and instead have it be
a per arch thing that is either enabled or not for that arch.
 -Erik

1 files changed, 10 insertions, 101 deletions

diff --git a/libc/sysdeps/linux/sh/bits/syscalls.h b/libc/sysdeps/linux/sh/bits/syscalls.h
index 9759f0b4a..da6a6d43e 100644
--- a/libc/sysdeps/linux/sh/bits/syscalls.h
+++ b/libc/sysdeps/linux/sh/bits/syscalls.h
@@ -1,106 +1,15 @@
-/* This file is based on the asm/unistd.h kernel header file.
- * Including asm/unistd.h is hereby officially forbidden.  
- * Don't do it.  It is bad for you.  */ 
+#ifndef _BITS_SYSCALLS_H
+#define _BITS_SYSCALLS_H
+#ifndef _SYSCALL_H
+# error "Never use <bits/syscall.h> directly; include <sys/syscall.h> instead."
+#endif
 
 #include <features.h>
 
-/* FIXME: perhaps sh needs separate PIC syscalls? */ 
-
-
-#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); \
-		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); \
-}
+/* 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>
 
+#endif /* _BITS_SYSCALLS_H */