| // Copyright 2016 The Fuchsia Authors |
| // Copyright (c) 2008-2013 Travis Geiselbrecht |
| // |
| // Use of this source code is governed by a MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT |
| |
| #pragma once |
| |
| #ifndef __ASSEMBLER__ |
| #error for assembly files only |
| #endif |
| |
| #include <arch/asm_macros.h> |
| |
| // for functions that don't have an "end" or don't want .cfi_startproc |
| #define LOCAL_FUNCTION_LABEL(x) .type x,STT_FUNC; x: |
| #define FUNCTION_LABEL(x) .global x; .hidden x; LOCAL_FUNCTION_LABEL(x) |
| |
| #define LOCAL_FUNCTION(x) LOCAL_FUNCTION_LABEL(x) .cfi_startproc |
| #define FUNCTION(x) .global x; .hidden x; LOCAL_FUNCTION(x) |
| |
| // for local or global functions |
| #define END_FUNCTION(x) .cfi_endproc; .size x, . - x |
| |
| #define LOCAL_DATA(x) .type x,STT_OBJECT; x: |
| #define DATA(x) .global x; .hidden x; LOCAL_DATA(x) |
| |
| // for local or global data |
| #define END_DATA(x) .size x, . - x |
| |
| // Some DWARF constants for CFI description. |
| #define DW_CFA_val_expression 0x16 |
| #define DW_OP_lit0 0x30 |
| |
| .macro cfi_register_is_zero reg |
| .cfi_escape DW_CFA_val_expression, \reg, 1, DW_OP_lit0 |
| .endm |
| |
| // We want .debug_frame not .eh_frame. |
| // WARNING: This is a subtle side-effect of including this file. Heads up! |
| .cfi_sections .debug_frame |
