From b38bccff42a8cf97d67c7b33fb853c21047146d9 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Wed, 27 Jun 2001 18:25:11 +0000
Subject: Step one in a process to ween ourselves off of using asm/unistd.h.
 This will break the build for a bit.  -Erik

---
 libc/sysdeps/linux/i386/bits/syscalls.h | 80 ++++++++++++++++++++++++++++++++-
 1 file changed, 79 insertions(+), 1 deletion(-)

(limited to 'libc')

diff --git a/libc/sysdeps/linux/i386/bits/syscalls.h b/libc/sysdeps/linux/i386/bits/syscalls.h
index 7a1201a2f..ed5fad805 100644
--- a/libc/sysdeps/linux/i386/bits/syscalls.h
+++ b/libc/sysdeps/linux/i386/bits/syscalls.h
@@ -1,4 +1,8 @@
-#include <asm/unistd.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.  */ 
 
 #undef __syscall_return
 #define __syscall_return(type, res) \
@@ -11,6 +15,18 @@ do { \
 } while (0)
 
 
+#undef _syscall0
+#define _syscall0(type,name) \
+type name(void) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+	: "=a" (__res) \
+	: "0" (__NR_##name)); \
+__syscall_return(type,__res); \
+}
+
+
 #if defined(__PIC__)
 
 /*
@@ -76,6 +92,68 @@ __asm__ volatile ("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
 __syscall_return(type,__res); \
 }
 
+#else  /* not doing __PIC__ */
+
+#undef _syscall1
+#define _syscall1(type,name,type1,arg1) \
+type name(type1 arg1) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+	: "=a" (__res) \
+	: "0" (__NR_##name),"b" ((long)(arg1))); \
+__syscall_return(type,__res); \
+}
+
+#undef _syscall2
+#define _syscall2(type,name,type1,arg1,type2,arg2) \
+type name(type1 arg1,type2 arg2) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+	: "=a" (__res) \
+	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2))); \
+__syscall_return(type,__res); \
+}
+
+#undef _syscall3
+#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
+type name(type1 arg1,type2 arg2,type3 arg3) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+	: "=a" (__res) \
+	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
+		  "d" ((long)(arg3))); \
+__syscall_return(type,__res); \
+}
+
+#undef _syscall4
+#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
+type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+	: "=a" (__res) \
+	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
+	  "d" ((long)(arg3)),"S" ((long)(arg4))); \
+__syscall_return(type,__res); \
+} 
+
+#undef _syscall5
+#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) \
+{ \
+long __res; \
+__asm__ volatile ("int $0x80" \
+	: "=a" (__res) \
+	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
+	  "d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5))); \
+__syscall_return(type,__res); \
+}
+
+
 #endif /* __PIC__ */
 
 
-- 
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