| // Copyright 2016 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. |
| |
| #pragma once |
| |
| #include <zircon/compiler.h> |
| #include <zircon/syscalls.h> |
| |
| // This defines the struct shared with the kernel. |
| #include <lib/vdso-constants.h> |
| |
| extern __LOCAL const struct vdso_constants DATA_CONSTANTS; |
| |
| extern "C" { |
| |
| // This declares the VDSO_zx_* aliases for the vDSO entry points. |
| // Calls made from within the vDSO must use these names rather than |
| // the public names so as to avoid PLT entries. |
| #include <zircon/syscall-vdso-definitions.h> |
| |
| __LOCAL decltype(zx_ticks_get) CODE_soft_ticks_get; |
| |
| } |
| |
| // Code should define '_zx_foo' and then do 'VDSO_INTERFACE_FUNCTION(zx_foo);' |
| // to define the public name 'zx_foo' and the vDSO-private name 'VDSO_zx_foo'. |
| #define VDSO_INTERFACE_FUNCTION(name) \ |
| decltype(name) name __WEAK_ALIAS("_" #name); \ |
| decltype(name) VDSO_##name __LOCAL __ALIAS("_" #name) |
| |
| // This symbol is expected to appear in the build-time vDSO symbol table so |
| // kernel/lib/vdso/ code can use it. |
| #define VDSO_KERNEL_EXPORT __attribute__((used)) |
