diff options
Diffstat (limited to 'libc/sysdeps/linux/nds32/bsd-setjmp.S')
| -rw-r--r-- | libc/sysdeps/linux/nds32/bsd-setjmp.S | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/nds32/bsd-setjmp.S b/libc/sysdeps/linux/nds32/bsd-setjmp.S new file mode 100644 index 000000000..b00e62da8 --- /dev/null +++ b/libc/sysdeps/linux/nds32/bsd-setjmp.S @@ -0,0 +1,34 @@ +/* + * Copyright (C) 2016 Andes Technology, Inc. + * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. + */ + +/* This just does a tail-call to `__sigsetjmp (ARG, 1)'. + We cannot do it in C because it must be a tail-call, so frame-unwinding + in setjmp doesn't clobber the state restored by longjmp. */ + +#include <sysdep.h> + +ENTRY(setjmp) + move $r1, #1 + +/* Make a tail call to __sigsetjmp. */ +#ifdef PIC + /* Initialize $r2 as $gp value. */ + sethi $r2, hi20(_GLOBAL_OFFSET_TABLE_-8) + ori $r2, $r2, lo12(_GLOBAL_OFFSET_TABLE_-4) + mfusr $r15, $pc + add $r2, $r15, $r2 + + ! la $r3, __sigsetjmp@PLT + sethi $r3, hi20(__sigsetjmp@PLT) + ori $r3, $r3, lo12(__sigsetjmp@PLT) + add $r3, $r3, $r2 + + jr $r3 +#else /* NOT PIC */ + la $r15, C_SYMBOL_NAME(__sigsetjmp) + jr $r15 +#endif + +END (setjmp) |