| /* ===-- assembly.h - libUnwind assembler support macros -------------------=== |
| * |
| * The LLVM Compiler Infrastructure |
| * |
| * This file is dual licensed under the MIT and the University of Illinois Open |
| * Source Licenses. See LICENSE.TXT for details. |
| * |
| * ===----------------------------------------------------------------------=== |
| * |
| * This file defines macros for use in libUnwind assembler source. |
| * This file is not part of the interface of this library. |
| * |
| * ===----------------------------------------------------------------------=== |
| */ |
| |
| #ifndef UNWIND_ASSEMBLY_H |
| #define UNWIND_ASSEMBLY_H |
| |
| #if defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__) |
| #define SEPARATOR @ |
| #elif defined(__arm64__) |
| #define SEPARATOR %% |
| #else |
| #define SEPARATOR ; |
| #endif |
| |
| #define GLUE2(a, b) a ## b |
| #define GLUE(a, b) GLUE2(a, b) |
| #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name) |
| |
| #if defined(__APPLE__) |
| |
| #define SYMBOL_IS_FUNC(name) |
| #define HIDDEN_SYMBOL(name) .private_extern name |
| #define NO_EXEC_STACK_DIRECTIVE |
| |
| #elif defined(__ELF__) |
| |
| #if defined(__arm__) |
| #define SYMBOL_IS_FUNC(name) .type name,%function |
| #else |
| #define SYMBOL_IS_FUNC(name) .type name,@function |
| #endif |
| #define HIDDEN_SYMBOL(name) .hidden name |
| |
| #if defined(__GNU__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \ |
| defined(__linux__) |
| #define NO_EXEC_STACK_DIRECTIVE .section .note.GNU-stack,"",%progbits |
| #else |
| #define NO_EXEC_STACK_DIRECTIVE |
| #endif |
| |
| #elif defined(_WIN32) |
| |
| #define SYMBOL_IS_FUNC(name) \ |
| .def name SEPARATOR \ |
| .scl 2 SEPARATOR \ |
| .type 32 SEPARATOR \ |
| .endef |
| #define HIDDEN_SYMBOL(name) |
| |
| #define NO_EXEC_STACK_DIRECTIVE |
| |
| #else |
| |
| #error Unsupported target |
| |
| #endif |
| |
| #define DEFINE_LIBUNWIND_FUNCTION(name) \ |
| .globl SYMBOL_NAME(name) SEPARATOR \ |
| SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ |
| SYMBOL_NAME(name): |
| |
| #define DEFINE_LIBUNWIND_PRIVATE_FUNCTION(name) \ |
| .globl SYMBOL_NAME(name) SEPARATOR \ |
| HIDDEN_SYMBOL(SYMBOL_NAME(name)) SEPARATOR \ |
| SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ |
| SYMBOL_NAME(name): |
| |
| #if defined(__arm__) |
| #if !defined(__ARM_ARCH) |
| #define __ARM_ARCH 4 |
| #endif |
| |
| #if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5 |
| #define ARM_HAS_BX |
| #endif |
| |
| #ifdef ARM_HAS_BX |
| #define JMP(r) bx r |
| #else |
| #define JMP(r) mov pc, r |
| #endif |
| #endif /* __arm__ */ |
| |
| #endif /* UNWIND_ASSEMBLY_H */ |