| // Copyright 2017 The Fuchsia Authors |
| // |
| // 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 |
| |
| // Use these when pushing a register from the calling frame. |
| // Here we can easily describe where to find the value of the register. |
| |
| .macro push_reg reg |
| pushq \reg |
| .cfi_adjust_cfa_offset 8 |
| .cfi_rel_offset \reg, 0 |
| .endm |
| |
| .macro pop_reg reg |
| popq \reg |
| .cfi_adjust_cfa_offset -8 |
| .cfi_same_value \reg |
| .endm |
| |
| // Use these when pushing a value other than the above, or when pushing |
| // a register that is not from the calling frame. |
| // Here we just punt on trying to describe the value pushed, the caller |
| // can do so if desired. |
| |
| .macro push_value value |
| pushq \value |
| .cfi_adjust_cfa_offset 8 |
| .endm |
| |
| .macro pop_value value |
| popq \value |
| .cfi_adjust_cfa_offset -8 |
| .endm |
| |
| // Use these when adding/subtracting values from the stack pointer. |
| // The value must be positive. |
| |
| .macro sub_from_sp value |
| sub $\value, %rsp |
| .cfi_adjust_cfa_offset \value |
| .endm |
| |
| .macro add_to_sp value |
| add $\value, %rsp |
| .cfi_adjust_cfa_offset -\value |
| .endm |
| |
| // For "functions" that are not normal functions in the ABI sense. |
| // Treat all previous frame registers as having the same value. |
| |
| #define ALL_CFI_SAME_VALUE \ |
| .cfi_same_value %rax ; \ |
| .cfi_same_value %rbx ; \ |
| .cfi_same_value %rcx ; \ |
| .cfi_same_value %rdx ; \ |
| .cfi_same_value %rsi ; \ |
| .cfi_same_value %rdi ; \ |
| .cfi_same_value %rbp ; \ |
| .cfi_same_value %r8 ; \ |
| .cfi_same_value %r9 ; \ |
| .cfi_same_value %r10 ; \ |
| .cfi_same_value %r11 ; \ |
| .cfi_same_value %r12 ; \ |
| .cfi_same_value %r13 ; \ |
| .cfi_same_value %r14 ; \ |
| .cfi_same_value %r15 |
| |
| // Treat all previous frame registers as not being restorable. |
| |
| #define ALL_CFI_UNDEFINED \ |
| .cfi_undefined %rax ; \ |
| .cfi_undefined %rbx ; \ |
| .cfi_undefined %rcx ; \ |
| .cfi_undefined %rdx ; \ |
| .cfi_undefined %rsi ; \ |
| .cfi_undefined %rdi ; \ |
| .cfi_undefined %rbp ; \ |
| .cfi_undefined %r8 ; \ |
| .cfi_undefined %r9 ; \ |
| .cfi_undefined %r10 ; \ |
| .cfi_undefined %r11 ; \ |
| .cfi_undefined %r12 ; \ |
| .cfi_undefined %r13 ; \ |
| .cfi_undefined %r14 ; \ |
| .cfi_undefined %r15 |
