//===-- sanitizer_asm.h -----------------------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // Various support for assemebler. // //===----------------------------------------------------------------------===// // Some toolchains do not support .cfi asm directives, so we have to hide // them inside macros. #if defined(__clang__) || \ (defined(__GNUC__) && defined(__GCC_HAVE_DWARF2_CFI_ASM)) // GCC defined __GCC_HAVE_DWARF2_CFI_ASM if it supports CFI. // Clang seems to support CFI by default (or not?). // We need two versions of macros: for inline asm and standalone asm files. # define CFI_INL_ADJUST_CFA_OFFSET(n) ".cfi_adjust_cfa_offset " #n ";" # define CFI_STARTPROC .cfi_startproc # define CFI_ENDPROC .cfi_endproc # define CFI_ADJUST_CFA_OFFSET(n) .cfi_adjust_cfa_offset n # define CFI_DEF_CFA_OFFSET(n) .cfi_def_cfa_offset n # define CFI_REL_OFFSET(reg, n) .cfi_rel_offset reg, n # define CFI_OFFSET(reg, n) .cfi_offset reg, n # define CFI_DEF_CFA_REGISTER(reg) .cfi_def_cfa_register reg # define CFI_DEF_CFA(reg, n) .cfi_def_cfa reg, n # define CFI_RESTORE(reg) .cfi_restore reg #else // No CFI # define CFI_INL_ADJUST_CFA_OFFSET(n) # define CFI_STARTPROC # define CFI_ENDPROC # define CFI_ADJUST_CFA_OFFSET(n) # define CFI_DEF_CFA_OFFSET(n) # define CFI_REL_OFFSET(reg, n) # define CFI_OFFSET(reg, n) # define CFI_DEF_CFA_REGISTER(reg) # define CFI_DEF_CFA(reg, n) # define CFI_RESTORE(reg) #endif #if !defined(__APPLE__) # define ASM_HIDDEN(symbol) .hidden symbol # define ASM_TYPE_FUNCTION(symbol) .type symbol, @function # define ASM_SIZE(symbol) .size symbol, .-symbol # define ASM_SYMBOL(symbol) symbol # define ASM_SYMBOL_INTERCEPTOR(symbol) symbol #else # define ASM_HIDDEN(symbol) # define ASM_TYPE_FUNCTION(symbol) # define ASM_SIZE(symbol) # define ASM_SYMBOL(symbol) _##symbol # define ASM_SYMBOL_INTERCEPTOR(symbol) _wrap_##symbol #endif