| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| .macro zircon_syscall num, name, caller |
| mov x16, #\num |
| svc #0x0 |
| // This symbol at the return address identifies this as an approved call site. |
| .hidden CODE_SYSRET_\name\()_VIA_\caller |
| CODE_SYSRET_\name\()_VIA_\caller\(): |
| .endm |
| |
| // CFI aware push and pop macros. |
| // SP must always be aligned to 16, so never push just one register. |
| .macro push_regpair reg0, reg1 |
| stp \reg0, \reg1, [sp, #-16]! |
| .cfi_adjust_cfa_offset 16 |
| .cfi_rel_offset \reg0, 0 |
| .cfi_rel_offset \reg1, 8 |
| .endm |
| .macro pop_regpair reg0, reg1 |
| ldp \reg0, \reg1, [sp], #16 |
| .cfi_adjust_cfa_offset -16 |
| .cfi_same_value \reg0 |
| .cfi_same_value \reg1 |
| .endm |
