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      1 /* ===-- assembly.h - compiler-rt assembler support macros -----------------===
      2  *
      3  *                     The LLVM Compiler Infrastructure
      4  *
      5  * This file is dual licensed under the MIT and the University of Illinois Open
      6  * Source Licenses. See LICENSE.TXT for details.
      7  *
      8  * ===----------------------------------------------------------------------===
      9  *
     10  * This file defines macros for use in compiler-rt assembler source.
     11  * This file is not part of the interface of this library.
     12  *
     13  * ===----------------------------------------------------------------------===
     14  */
     15 
     16 #ifndef COMPILERRT_ASSEMBLY_H
     17 #define COMPILERRT_ASSEMBLY_H
     18 
     19 #if defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__)
     20 #define SEPARATOR @
     21 #else
     22 #define SEPARATOR ;
     23 #endif
     24 
     25 #if defined(__APPLE__)
     26 #define HIDDEN_DIRECTIVE .private_extern
     27 #define LOCAL_LABEL(name) L_##name
     28 #else
     29 #define HIDDEN_DIRECTIVE .hidden
     30 #define LOCAL_LABEL(name) .L_##name
     31 #endif
     32 
     33 #define GLUE2(a, b) a ## b
     34 #define GLUE(a, b) GLUE2(a, b)
     35 #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
     36 
     37 #ifdef VISIBILITY_HIDDEN
     38 #define DECLARE_SYMBOL_VISIBILITY(name)                    \
     39   HIDDEN_DIRECTIVE SYMBOL_NAME(name) SEPARATOR
     40 #else
     41 #define DECLARE_SYMBOL_VISIBILITY(name)
     42 #endif
     43 
     44 #define DEFINE_COMPILERRT_FUNCTION(name)                   \
     45   .globl SYMBOL_NAME(name) SEPARATOR                       \
     46   DECLARE_SYMBOL_VISIBILITY(name)                          \
     47   SYMBOL_NAME(name):
     48 
     49 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION(name)           \
     50   .globl SYMBOL_NAME(name) SEPARATOR                       \
     51   HIDDEN_DIRECTIVE SYMBOL_NAME(name) SEPARATOR             \
     52   SYMBOL_NAME(name):
     53 
     54 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION_UNMANGLED(name) \
     55   .globl name SEPARATOR                                    \
     56   HIDDEN_DIRECTIVE name SEPARATOR                          \
     57   name:
     58 
     59 #define DEFINE_COMPILERRT_FUNCTION_ALIAS(name, target)     \
     60   .globl SYMBOL_NAME(name) SEPARATOR                       \
     61   .set SYMBOL_NAME(name), SYMBOL_NAME(target) SEPARATOR
     62 
     63 #if defined (__ARM_EABI__)
     64 # define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)      \
     65   DEFINE_COMPILERRT_FUNCTION_ALIAS(aeabi_name, name)
     66 #else
     67 # define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)
     68 #endif
     69 
     70 #endif /* COMPILERRT_ASSEMBLY_H */
     71