zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libc/sysdeps/linux/i386/sigaction.c b/ap/build/uClibc/libc/sysdeps/linux/i386/sigaction.c
new file mode 100644
index 0000000..a6a22de
--- /dev/null
+++ b/ap/build/uClibc/libc/sysdeps/linux/i386/sigaction.c
@@ -0,0 +1,142 @@
+/* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+
+ Totally hacked up for uClibc by Erik Andersen <andersen@codepoet.org>
+ */
+
+#include <errno.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/syscall.h>
+#include <bits/kernel_sigaction.h>
+
+#define SA_RESTORER 0x04000000
+
+extern __typeof(sigaction) __libc_sigaction;
+
+
+#if defined __NR_rt_sigaction
+
+extern void restore_rt(void) __asm__ ("__restore_rt") attribute_hidden;
+extern void restore(void) __asm__ ("__restore") attribute_hidden;
+
+/* If ACT is not NULL, change the action for SIG to *ACT.
+ If OACT is not NULL, put the old action for SIG in *OACT. */
+int __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
+{
+ struct sigaction kact;
+
+ if (act) {
+ memcpy(&kact, act, sizeof(kact));
+ kact.sa_flags |= SA_RESTORER;
+ kact.sa_restorer = (act->sa_flags & SA_SIGINFO) ? &restore_rt : &restore;
+ act = &kact;
+ }
+ /* NB: kernel (as of 2.6.25) will return EINVAL
+ * if sizeof(act->sa_mask) does not match kernel's sizeof(sigset_t) */
+ return __syscall_rt_sigaction(sig, act, oact, sizeof(act->sa_mask));
+}
+
+#else
+
+extern void restore(void) __asm__ ("__restore") attribute_hidden;
+
+/* If ACT is not NULL, change the action for SIG to *ACT.
+ If OACT is not NULL, put the old action for SIG in *OACT. */
+int __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
+{
+ int result;
+ struct old_kernel_sigaction kact, koact;
+
+ if (act) {
+ kact.k_sa_handler = act->sa_handler;
+ kact.sa_mask = act->sa_mask.__val[0];
+ kact.sa_flags = act->sa_flags | SA_RESTORER;
+ kact.sa_restorer = &restore;
+ }
+ __asm__ __volatile__ (
+ " pushl %%ebx\n"
+ " movl %3, %%ebx\n"
+ " int $0x80\n"
+ " popl %%ebx\n"
+ : "=a" (result), "=m" (koact)
+ : "0" (__NR_sigaction), "r" (sig), "m" (kact),
+ "c" (act ? &kact : NULL),
+ "d" (oact ? &koact : NULL));
+ if (result < 0) {
+ __set_errno(-result);
+ return -1;
+ }
+ if (oact) {
+ oact->sa_handler = koact.k_sa_handler;
+ oact->sa_mask.__val[0] = koact.sa_mask;
+ oact->sa_flags = koact.sa_flags;
+ oact->sa_restorer = koact.sa_restorer;
+ }
+ return result;
+}
+
+#endif
+
+
+#ifndef LIBC_SIGACTION
+# ifndef __UCLIBC_HAS_THREADS__
+strong_alias(__libc_sigaction,sigaction)
+libc_hidden_def(sigaction)
+# else
+weak_alias(__libc_sigaction,sigaction)
+libc_hidden_weak(sigaction)
+# endif
+#endif
+
+
+/* NOTE: Please think twice before making any changes to the bits of
+ code below. GDB needs some intimate knowledge about it to
+ recognize them as signal trampolines, and make backtraces through
+ signal handlers work right. Important are both the names
+ (__restore and __restore_rt) and the exact instruction sequence.
+ If you ever feel the need to make any changes, please notify the
+ appropriate GDB maintainer. */
+
+#define RESTORE(name, syscall) RESTORE2(name, syscall)
+
+#ifdef __NR_rt_sigaction
+/* The return code for realtime-signals. */
+# define RESTORE2(name, syscall) \
+__asm__ ( \
+ ".text\n" \
+ "__" #name ":\n" \
+ " movl $" #syscall ", %eax\n" \
+ " int $0x80\n" \
+);
+RESTORE(restore_rt, __NR_rt_sigreturn)
+#endif
+
+#ifdef __NR_sigreturn
+/* For the boring old signals. */
+# undef RESTORE2
+# define RESTORE2(name, syscall) \
+__asm__ ( \
+ ".text\n" \
+ "__" #name ":\n" \
+ " popl %eax\n" \
+ " movl $" #syscall ", %eax\n" \
+ " int $0x80\n" \
+);
+RESTORE(restore, __NR_sigreturn)
+#endif