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Diffstat (limited to 'libc/sysdeps/linux/avr32/syscall.S')
-rw-r--r--libc/sysdeps/linux/avr32/syscall.S71
1 files changed, 71 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/avr32/syscall.S b/libc/sysdeps/linux/avr32/syscall.S
new file mode 100644
index 000000000..f14fcdb30
--- /dev/null
+++ b/libc/sysdeps/linux/avr32/syscall.S
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2004-2007 Atmel Corporation
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file "COPYING.LIB" in the main directory of this
+ * archive for more details.
+ */
+#include <features.h>
+
+ .text
+
+ /*
+ * long int syscall(long int sysno, ...)
+ */
+ .global syscall
+ .type syscall, @function
+ .align 2
+syscall:
+ stm --sp, r3,r5,r6,lr
+ sub lr, sp, -16
+ mov r8, r12
+ ldm lr, r3,r5,r9-r12
+ scall
+ cp.w r12, -4095
+ brlo .Ldone
+
+#ifdef __PIC__
+ lddpc r6, .Lgot
+.Lgotcalc:
+ rsub r6, pc
+# ifdef __UCLIBC_HAS_THREADS__
+ rsub r3, r12, 0
+ mcall r6[__errno_location@got]
+ st.w r12[0], r3
+# else
+ ld.w r3, r6[errno@got]
+ neg r12
+ st.w r3[0], r12
+# endif
+#else
+# ifdef __UCLIBC_HAS_THREADS__
+ rsub r3, r12, 0
+ mcall .Lerrno_location
+ st.w r12[0], r3
+# else
+ lddpc r3, .Lerrno
+ neg r12
+ st.w r3[0], r12
+# endif
+#endif
+ mov r12, -1
+
+.Ldone:
+ ldm sp++, r3,r5,r6,pc
+
+ .align 2
+#ifdef __PIC__
+.Lgot:
+ .long .Lgotcalc - _GLOBAL_OFFSET_TABLE_
+#else
+# ifdef __UCLIBC_HAS_THREADS__
+.Lerrno_location:
+ .long __errno_location
+# else
+.Lerrno:
+ .long errno
+# endif
+#endif
+
+
+ .size syscall, . - syscall