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Diffstat (limited to 'libc/sysdeps/linux/arm/bits/syscalls.h')
-rw-r--r--libc/sysdeps/linux/arm/bits/syscalls.h119
1 files changed, 119 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/arm/bits/syscalls.h b/libc/sysdeps/linux/arm/bits/syscalls.h
new file mode 100644
index 000000000..42b20ffea
--- /dev/null
+++ b/libc/sysdeps/linux/arm/bits/syscalls.h
@@ -0,0 +1,119 @@
+/* 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. */
+
+#include <features.h>
+
+// TODO -- Add support for __UCLIBC_USE_UNIFIED_SYSCALL__
+
+
+#define __sys2(x) #x
+#define __sys1(x) __sys2(x)
+
+#ifndef __syscall
+#define __syscall(name) "swi\t" __sys1(__NR_##name) "\n\t"
+#endif
+
+#define __syscall_return(type, res) \
+do { \
+ if ((unsigned long)(res) >= (unsigned long)(-125)) { \
+ errno = -(res); \
+ res = -1; \
+ } \
+ return (type) (res); \
+} while (0)
+
+
+#define _syscall0(type,name) \
+type name(void) { \
+ long __res; \
+ __asm__ __volatile__ ( \
+ __syscall(name) \
+ "mov %0,r0" \
+ :"=r" (__res) : : "r0","lr"); \
+ __syscall_return(type,__res); \
+}
+
+#define _syscall1(type,name,type1,arg1) \
+type name(type1 arg1) { \
+ long __res; \
+ __asm__ __volatile__ ( \
+ "mov\tr0,%1\n\t" \
+ __syscall(name) \
+ "mov %0,r0" \
+ : "=r" (__res) \
+ : "r" ((long)(arg1)) \
+ : "r0","lr"); \
+ __syscall_return(type,__res); \
+}
+
+#define _syscall2(type,name,type1,arg1,type2,arg2) \
+type name(type1 arg1,type2 arg2) { \
+ long __res; \
+ __asm__ __volatile__ ( \
+ "mov\tr0,%1\n\t" \
+ "mov\tr1,%2\n\t" \
+ __syscall(name) \
+ "mov\t%0,r0" \
+ : "=r" (__res) \
+ : "r" ((long)(arg1)),"r" ((long)(arg2)) \
+ : "r0","r1","lr"); \
+ __syscall_return(type,__res); \
+}
+
+
+#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
+type name(type1 arg1,type2 arg2,type3 arg3) { \
+ long __res; \
+ __asm__ __volatile__ ( \
+ "mov\tr0,%1\n\t" \
+ "mov\tr1,%2\n\t" \
+ "mov\tr2,%3\n\t" \
+ __syscall(name) \
+ "mov\t%0,r0" \
+ : "=r" (__res) \
+ : "r" ((long)(arg1)),"r" ((long)(arg2)),"r" ((long)(arg3)) \
+ : "r0","r1","r2","lr"); \
+ __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__ ( \
+ "mov\tr0,%1\n\t" \
+ "mov\tr1,%2\n\t" \
+ "mov\tr2,%3\n\t" \
+ "mov\tr3,%4\n\t" \
+ __syscall(name) \
+ "mov\t%0,r0" \
+ : "=r" (__res) \
+ : "r" ((long)(arg1)),"r" ((long)(arg2)), \
+ "r" ((long)(arg3)),"r" ((long)(arg4)) \
+ : "r0","r1","r2","r3","lr"); \
+ __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__ ( \
+ "mov\tr0,%1\n\t" \
+ "mov\tr1,%2\n\t" \
+ "mov\tr2,%3\n\t" \
+ "mov\tr3,%4\n\t" \
+ "mov\tr4,%5\n\t" \
+ __syscall(name) \
+ "mov\t%0,r0" \
+ : "=r" (__res) \
+ : "r" ((long)(arg1)),"r" ((long)(arg2)), \
+ "r" ((long)(arg3)),"r" ((long)(arg4)), \
+ "r" ((long)(arg5)) \
+ : "r0","r1","r2","r3","r4","lr"); \
+ __syscall_return(type,__res); \
+}
+