zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libc/sysdeps/linux/i386/syscall.S b/ap/build/uClibc/libc/sysdeps/linux/i386/syscall.S
new file mode 100644
index 0000000..b9f65fe
--- /dev/null
+++ b/ap/build/uClibc/libc/sysdeps/linux/i386/syscall.S
@@ -0,0 +1,50 @@
+/*
+ * June 27, 2001 Manuel Novoa III
+ *
+ * This is a heavily modified version of gcc's output for the _syscall5 macro.
+ * The idea (originally from dietlibc) is that all syscall functions simply set
+ * the syscall number as the first argument, then set the syscall arguments as
+ * the next up-to-five arguments, and then jump here. All the common work is
+ * done by syscall(), saving a fair amount of generated code when a number of
+ * syscalls are used. The (potential) cost is some unnecessary pushes, pops,
+ * and movs but the execution time penalty should be relatively small compared
+ * to the cost of the syscall itself.
+ *
+ * July 24, 2002
+ *
+ * Modified by Erik Andersen to take all function parameters from off the stack
+ * like a proper function and eliminates the old 255 syscall number limit. So
+ * now we can just call this as a function as syscall() per the function
+ * prototype in unistd.h, so to call _exit(42) you can just call.
+ * syscall(__NR_exit, 42);
+ * and things will just work.
+ */
+
+.text
+.global syscall
+.type syscall,%function
+syscall:
+ pushl %ebp
+ pushl %edi
+ pushl %esi
+ pushl %ebx
+
+ movl 44(%esp),%ebp /* Load the 6 syscall argument registers */
+ movl 40(%esp),%edi
+ movl 36(%esp),%esi
+ movl 32(%esp),%edx
+ movl 28(%esp),%ecx
+ movl 24(%esp),%ebx
+ movl 20(%esp),%eax /* Load syscall number into %eax. */
+ int $0x80
+
+ popl %ebx
+ popl %esi
+ popl %edi
+ popl %ebp
+
+ cmpl $-4095,%eax
+ jae __syscall_error
+ ret /* Return to caller. */
+
+.size syscall,.-syscall