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Diffstat (limited to 'lib/sanitizer_common/sanitizer_asm.h')
| -rw-r--r-- | lib/sanitizer_common/sanitizer_asm.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/lib/sanitizer_common/sanitizer_asm.h b/lib/sanitizer_common/sanitizer_asm.h new file mode 100644 index 000000000000..906012a96f11 --- /dev/null +++ b/lib/sanitizer_common/sanitizer_asm.h @@ -0,0 +1,40 @@ +//===-- 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_REL_OFFSET(reg, n) .cfi_rel_offset reg, n +# define CFI_DEF_CFA_REGISTER(reg) .cfi_def_cfa_register reg +# 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_REL_OFFSET(reg, n) +# define CFI_DEF_CFA_REGISTER(reg) +# define CFI_RESTORE(reg) +#endif + + |