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Diffstat (limited to 'libc/sysdeps/linux/or1k/bits/syscalls.h')
-rw-r--r--libc/sysdeps/linux/or1k/bits/syscalls.h101
1 files changed, 101 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/or1k/bits/syscalls.h b/libc/sysdeps/linux/or1k/bits/syscalls.h
new file mode 100644
index 000000000..6a08d3cd1
--- /dev/null
+++ b/libc/sysdeps/linux/or1k/bits/syscalls.h
@@ -0,0 +1,101 @@
+/*
+ * Based on arm/bits/syscalls.h
+ */
+
+#ifndef _BITS_SYSCALLS_H
+#define _BITS_SYSCALLS_H
+#ifndef _SYSCALL_H
+# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
+#endif
+
+/*
+ Some of the sneaky macros in the code were taken from
+ glibc-2.3.2/sysdeps/unix/sysv/linux/arm/sysdep.h
+*/
+
+#ifdef __ASSEMBLER__
+
+/* TODO: recheck this */
+
+/* Call a given syscall, with arguments loaded. Unlike the DO_CALL
+ macro in glibc, this macro does not load syscall arguments. */
+#undef DO_CALL
+#define DO_CALL(syscall_name) \
+ l.lwz r11, =SYS_ify (syscall_name); \
+ l.sys 1 \
+ l.nop
+
+#else
+
+#include <errno.h>
+
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
+ ({ unsigned long __sys_result; \
+ { \
+ register long __sc_ret __asm__ ("r11") = name; \
+ LOAD_ARGS_##nr (args) \
+ __asm__ __volatile__ ("l.sys 1" \
+ : "=r" (__sc_ret) ASM_ARGS_OUT_##nr \
+ : "0" (__sc_ret) ASM_ARGS_IN_##nr \
+ : ASM_CLOBBERS_##nr \
+ "r12", "r13", "r15", "r17", "r19", \
+ "r21", "r23", "r25", "r27", "r29", \
+ "r31"); \
+ __asm__ __volatile__ ("l.nop"); \
+ __sys_result = __sc_ret; \
+ } \
+ (long) __sys_result; })
+
+/* : "0", "1", "2", "3", "4", "5", "6", \ */
+/* : ASM_CLOBBERS_##nr, \ */
+
+#define LOAD_ARGS_0()
+
+#define ASM_ARGS_OUT_0
+#define ASM_ARGS_IN_0
+#define ASM_CLOBBERS_0 "r3", ASM_CLOBBERS_1
+
+#define LOAD_ARGS_1(a) \
+ LOAD_ARGS_0 () \
+ register long __a __asm__ ("r3") = (long)(a);
+#define ASM_ARGS_OUT_1 ASM_ARGS_OUT_0, "=r" (__a)
+#define ASM_ARGS_IN_1 ASM_ARGS_IN_0, "1" (__a)
+#define ASM_CLOBBERS_1 "r4", ASM_CLOBBERS_2
+
+#define LOAD_ARGS_2(a, b) \
+ LOAD_ARGS_1 (a) \
+ register long __b __asm__ ("r4") = (long)(b);
+#define ASM_ARGS_OUT_2 ASM_ARGS_OUT_1, "=r" (__b)
+#define ASM_ARGS_IN_2 ASM_ARGS_IN_1, "2" (__b)
+#define ASM_CLOBBERS_2 "r5", ASM_CLOBBERS_3
+
+#define LOAD_ARGS_3(a, b, c) \
+ LOAD_ARGS_2 (a, b) \
+ register long __c __asm__ ("r5") = (long)(c);
+#define ASM_ARGS_OUT_3 ASM_ARGS_OUT_2, "=r" (__c)
+#define ASM_ARGS_IN_3 ASM_ARGS_IN_2, "3" (__c)
+#define ASM_CLOBBERS_3 "r6", ASM_CLOBBERS_4
+
+#define LOAD_ARGS_4(a, b, c, d) \
+ LOAD_ARGS_3 (a, b, c) \
+ register long __d __asm__ ("r6") = (long)(d);
+#define ASM_ARGS_OUT_4 ASM_ARGS_OUT_3, "=r" (__d)
+#define ASM_ARGS_IN_4 ASM_ARGS_IN_3, "4" (__d)
+#define ASM_CLOBBERS_4 "r7", ASM_CLOBBERS_5
+
+#define LOAD_ARGS_5(a, b, c, d, e) \
+ LOAD_ARGS_4 (a, b, c, d) \
+ register long __e __asm__ ("r7") = (long)(e);
+#define ASM_ARGS_OUT_5 ASM_ARGS_OUT_4, "=r" (__e)
+#define ASM_ARGS_IN_5 ASM_ARGS_IN_4, "5" (__e)
+#define ASM_CLOBBERS_5 "r8", ASM_CLOBBERS_6
+
+#define LOAD_ARGS_6(a, b, c, d, e, f) \
+ LOAD_ARGS_5 (a, b, c, d, e) \
+ register long __f __asm__ ("r8") = (long)(f);
+#define ASM_ARGS_OUT_6 ASM_ARGS_OUT_5, "=r" (__f)
+#define ASM_ARGS_IN_6 ASM_ARGS_IN_5, "6" (__f)
+#define ASM_CLOBBERS_6
+
+#endif /* __ASSEMBLER__ */
+#endif /* _BITS_SYSCALLS_H */