libc: ARM: add size info to gensyscalls

Add size information to gensyscalls output for ARM syscalls with new
BEGIN(x) and END(x) macros in arch-arm/include/machine/asm.h

Change-Id: I791406f8b17abcb83b70a6d15a65a527de15d3f5

libc/tools/gensyscalls.py

@@ -79,15 +79,14 @@ x86_return = """    ret
 # ARM assembler templates for each syscall stub
 #
 arm_header = """/* autogenerated by gensyscalls.py */
+#include <machine/asm.h>
 #include <sys/linux-syscalls.h>
 
-    .text
-    .type %(fname)s, #function
-    .globl %(fname)s
-    .align 4
-    .fnstart
+ENTRY(%(fname)s)
+"""
 
-%(fname)s:
+arm_footer = """\
+END(%(fname)s)
 """
 
 arm_call_default = arm_header + """\
@@ -95,8 +94,7 @@ arm_call_default = arm_header + """\
     movs    r0, r0
     bxpl    lr
     b       __set_syscall_errno
-    .fnend
-"""
+""" + arm_footer
 
 arm_call_long = arm_header + """\
     .save   {r4, r5, lr}
@@ -108,8 +106,7 @@ arm_call_long = arm_header + """\
     movs    r0, r0
     bxpl    lr
     b       __set_syscall_errno
-    .fnend
-"""
+""" + arm_footer
 
 arm_eabi_call_default = arm_header + """\
     .save   {r4, r7}
@@ -120,8 +117,7 @@ arm_eabi_call_default = arm_header + """\
     movs    r0, r0
     bxpl    lr
     b       __set_syscall_errno
-    .fnend
-"""
+""" + arm_footer
 
 arm_eabi_call_long = arm_header + """\
     mov     ip, sp
@@ -134,8 +130,7 @@ arm_eabi_call_long = arm_header + """\
     movs    r0, r0
     bxpl    lr
     b       __set_syscall_errno
-    .fnend
-"""
+""" + arm_footer
 
 # ARM thumb assembler templates for each syscall stub
 #