diff options
| -rw-r--r-- | libc/sysdeps/linux/arc/Makefile.arch | 3 | ||||
| -rw-r--r-- | libc/sysdeps/linux/arc/sigaction.c | 6 | ||||
| -rw-r--r-- | libc/sysdeps/linux/arc/sigrestorer.S | 25 |
3 files changed, 28 insertions, 6 deletions
diff --git a/libc/sysdeps/linux/arc/Makefile.arch b/libc/sysdeps/linux/arc/Makefile.arch index 1a52fc9bf..a4aa72c0a 100644 --- a/libc/sysdeps/linux/arc/Makefile.arch +++ b/libc/sysdeps/linux/arc/Makefile.arch @@ -7,4 +7,5 @@ CSRC-y := syscall.c sigaction.c __syscall_error.c cacheflush.c -SSRC-y := __longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S vfork.S clone.S +SSRC-y := __longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S vfork.S clone.S \ + sigrestorer.S diff --git a/libc/sysdeps/linux/arc/sigaction.c b/libc/sysdeps/linux/arc/sigaction.c index 67ca38aca..64a6255c4 100644 --- a/libc/sysdeps/linux/arc/sigaction.c +++ b/libc/sysdeps/linux/arc/sigaction.c @@ -13,11 +13,7 @@ /* * Default sigretrun stub if user doesn't specify SA_RESTORER */ -static void attribute_optimize("Os") __attribute_noinline__ -__default_rt_sa_restorer(void) -{ - INTERNAL_SYSCALL_NCS(__NR_rt_sigreturn, , 0); -} +extern void __default_rt_sa_restorer(void); #define SA_RESTORER 0x04000000 diff --git a/libc/sysdeps/linux/arc/sigrestorer.S b/libc/sysdeps/linux/arc/sigrestorer.S new file mode 100644 index 000000000..e4deb6bd4 --- /dev/null +++ b/libc/sysdeps/linux/arc/sigrestorer.S @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2017 Synopsys, Inc. (www.synopsys.com) + * + * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + */ + +#include <sysdep.h> + +/* + * Default sigretrun stub if user doesn't specify SA_RESTORER. + */ + +.section .text +.align 4 +.global __default_rt_sa_restorer +.type __default_rt_sa_restorer, @function + +; This "nop" is needed here, because debugger would assume that this function +; called the signal handler, therefore it cannot start on the "mov" +; instruction, at which execution will jump to. + nop +__default_rt_sa_restorer: + mov r8, __NR_rt_sigreturn + ARC_TRAP_INSN + |