1276789Sdim//===-- sanitizer_asm.h -----------------------------------------*- C++ -*-===// 2276789Sdim// 3276789Sdim// The LLVM Compiler Infrastructure 4276789Sdim// 5276789Sdim// This file is distributed under the University of Illinois Open Source 6276789Sdim// License. See LICENSE.TXT for details. 7276789Sdim// 8276789Sdim//===----------------------------------------------------------------------===// 9276789Sdim// 10276789Sdim// Various support for assemebler. 11276789Sdim// 12276789Sdim//===----------------------------------------------------------------------===// 13276789Sdim 14276789Sdim// Some toolchains do not support .cfi asm directives, so we have to hide 15276789Sdim// them inside macros. 16276789Sdim#if defined(__clang__) || \ 17276789Sdim (defined(__GNUC__) && defined(__GCC_HAVE_DWARF2_CFI_ASM)) 18276789Sdim // GCC defined __GCC_HAVE_DWARF2_CFI_ASM if it supports CFI. 19276789Sdim // Clang seems to support CFI by default (or not?). 20276789Sdim // We need two versions of macros: for inline asm and standalone asm files. 21276789Sdim# define CFI_INL_ADJUST_CFA_OFFSET(n) ".cfi_adjust_cfa_offset " #n ";" 22276789Sdim 23276789Sdim# define CFI_STARTPROC .cfi_startproc 24276789Sdim# define CFI_ENDPROC .cfi_endproc 25276789Sdim# define CFI_ADJUST_CFA_OFFSET(n) .cfi_adjust_cfa_offset n 26296417Sdim# define CFI_DEF_CFA_OFFSET(n) .cfi_def_cfa_offset n 27276789Sdim# define CFI_REL_OFFSET(reg, n) .cfi_rel_offset reg, n 28296417Sdim# define CFI_OFFSET(reg, n) .cfi_offset reg, n 29276789Sdim# define CFI_DEF_CFA_REGISTER(reg) .cfi_def_cfa_register reg 30296417Sdim# define CFI_DEF_CFA(reg, n) .cfi_def_cfa reg, n 31276789Sdim# define CFI_RESTORE(reg) .cfi_restore reg 32276789Sdim 33276789Sdim#else // No CFI 34276789Sdim# define CFI_INL_ADJUST_CFA_OFFSET(n) 35276789Sdim# define CFI_STARTPROC 36276789Sdim# define CFI_ENDPROC 37276789Sdim# define CFI_ADJUST_CFA_OFFSET(n) 38296417Sdim# define CFI_DEF_CFA_OFFSET(n) 39276789Sdim# define CFI_REL_OFFSET(reg, n) 40296417Sdim# define CFI_OFFSET(reg, n) 41276789Sdim# define CFI_DEF_CFA_REGISTER(reg) 42296417Sdim# define CFI_DEF_CFA(reg, n) 43276789Sdim# define CFI_RESTORE(reg) 44276789Sdim#endif 45276789Sdim 46296417Sdim#if !defined(__APPLE__) 47296417Sdim# define ASM_HIDDEN(symbol) .hidden symbol 48296417Sdim# define ASM_TYPE_FUNCTION(symbol) .type symbol, @function 49296417Sdim# define ASM_SIZE(symbol) .size symbol, .-symbol 50296417Sdim# define ASM_TSAN_SYMBOL(symbol) symbol 51296417Sdim# define ASM_TSAN_SYMBOL_INTERCEPTOR(symbol) symbol 52296417Sdim#else 53296417Sdim# define ASM_HIDDEN(symbol) 54296417Sdim# define ASM_TYPE_FUNCTION(symbol) 55296417Sdim# define ASM_SIZE(symbol) 56296417Sdim# define ASM_TSAN_SYMBOL(symbol) _##symbol 57296417Sdim# define ASM_TSAN_SYMBOL_INTERCEPTOR(symbol) _wrap_##symbol 58296417Sdim#endif 59