forked from M-Labs/artiq
libunwind: add rust interface
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6d9cebfd42
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[package]
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authors = ["The Rust Project Developers"]
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name = "unwind"
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version = "0.0.0"
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license = "MIT OR Apache-2.0"
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repository = "https://github.com/rust-lang/rust.git"
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edition = "2018"
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include = [
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'/libunwind/*',
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]
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[lib]
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test = false
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bench = false
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doc = false
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[dependencies]
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libc = { path = "../libc" }
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cfg-if = "0.1.8"
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[features]
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# Only applies for Linux and Fuchsia targets
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# Static link to the in-tree build of llvm libunwind
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llvm-libunwind = []
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# Only applies for Linux and Fuchsia targets
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# If crt-static is enabled, static link to `libunwind.a` provided by system
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# If crt-static is disabled, dynamic link to `libunwind.so` provided by system
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system-llvm-libunwind = []
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@ -0,0 +1,11 @@
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#![no_std]
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#![unstable(feature = "panic_unwind", issue = "32837")]
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#![feature(link_cfg)]
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#![feature(nll)]
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#![feature(staged_api)]
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#![feature(unwind_attributes)]
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#![feature(static_nobundle)]
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#![cfg_attr(not(target_env = "msvc"), feature(libc))]
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mod libunwind;
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pub use libunwind::*;
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@ -0,0 +1,282 @@
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#![allow(nonstandard_style)]
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use libc::{c_int, c_void, uintptr_t};
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#[repr(C)]
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#[derive(Debug, Copy, Clone, PartialEq)]
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pub enum _Unwind_Reason_Code {
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_URC_NO_REASON = 0,
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_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
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_URC_FATAL_PHASE2_ERROR = 2,
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_URC_FATAL_PHASE1_ERROR = 3,
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_URC_NORMAL_STOP = 4,
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_URC_END_OF_STACK = 5,
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_URC_HANDLER_FOUND = 6,
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_URC_INSTALL_CONTEXT = 7,
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_URC_CONTINUE_UNWIND = 8,
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_URC_FAILURE = 9, // used only by ARM EHABI
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}
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pub use _Unwind_Reason_Code::*;
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pub type _Unwind_Exception_Class = u64;
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pub type _Unwind_Word = uintptr_t;
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pub type _Unwind_Ptr = uintptr_t;
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pub type _Unwind_Trace_Fn =
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extern "C" fn(ctx: *mut _Unwind_Context, arg: *mut c_void) -> _Unwind_Reason_Code;
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#[cfg(target_arch = "x86")]
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pub const unwinder_private_data_size: usize = 5;
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#[cfg(target_arch = "x86_64")]
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pub const unwinder_private_data_size: usize = 6;
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#[cfg(all(target_arch = "arm", not(target_os = "ios")))]
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pub const unwinder_private_data_size: usize = 20;
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#[cfg(all(target_arch = "arm", target_os = "ios"))]
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pub const unwinder_private_data_size: usize = 5;
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#[cfg(all(target_arch = "aarch64", target_pointer_width = "64"))]
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pub const unwinder_private_data_size: usize = 2;
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#[cfg(all(target_arch = "aarch64", target_pointer_width = "32"))]
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pub const unwinder_private_data_size: usize = 5;
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#[cfg(target_arch = "mips")]
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pub const unwinder_private_data_size: usize = 2;
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#[cfg(target_arch = "mips64")]
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pub const unwinder_private_data_size: usize = 2;
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#[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
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pub const unwinder_private_data_size: usize = 2;
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#[cfg(target_arch = "s390x")]
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pub const unwinder_private_data_size: usize = 2;
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#[cfg(any(target_arch = "sparc", target_arch = "sparc64"))]
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pub const unwinder_private_data_size: usize = 2;
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#[cfg(any(target_arch = "riscv64", target_arch = "riscv32"))]
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pub const unwinder_private_data_size: usize = 2;
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#[cfg(target_os = "emscripten")]
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pub const unwinder_private_data_size: usize = 20;
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#[cfg(all(target_arch = "hexagon", target_os = "linux"))]
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pub const unwinder_private_data_size: usize = 35;
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#[repr(C)]
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pub struct _Unwind_Exception {
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pub exception_class: _Unwind_Exception_Class,
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pub exception_cleanup: _Unwind_Exception_Cleanup_Fn,
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pub private: [_Unwind_Word; unwinder_private_data_size],
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}
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pub enum _Unwind_Context {}
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pub type _Unwind_Exception_Cleanup_Fn =
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extern "C" fn(unwind_code: _Unwind_Reason_Code, exception: *mut _Unwind_Exception);
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#[cfg_attr(
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all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
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link(name = "unwind", kind = "static")
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)]
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extern "C" {
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#[unwind(allowed)]
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pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !;
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pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception);
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pub fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void;
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pub fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
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pub fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
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pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
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}
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cfg_if::cfg_if! {
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if #[cfg(any(target_os = "ios", target_os = "netbsd", not(target_arch = "arm")))] {
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// Not ARM EHABI
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#[repr(C)]
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#[derive(Copy, Clone, PartialEq)]
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pub enum _Unwind_Action {
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_UA_SEARCH_PHASE = 1,
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_UA_CLEANUP_PHASE = 2,
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_UA_HANDLER_FRAME = 4,
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_UA_FORCE_UNWIND = 8,
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_UA_END_OF_STACK = 16,
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}
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pub use _Unwind_Action::*;
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#[cfg_attr(all(feature = "llvm-libunwind",
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any(target_os = "fuchsia", target_os = "linux")),
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link(name = "unwind", kind = "static"))]
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extern "C" {
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pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word;
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pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word);
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pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word;
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pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word);
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pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int)
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-> _Unwind_Word;
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pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
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}
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} else {
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// ARM EHABI
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#[repr(C)]
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#[derive(Copy, Clone, PartialEq)]
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pub enum _Unwind_State {
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_US_VIRTUAL_UNWIND_FRAME = 0,
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_US_UNWIND_FRAME_STARTING = 1,
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_US_UNWIND_FRAME_RESUME = 2,
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_US_ACTION_MASK = 3,
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_US_FORCE_UNWIND = 8,
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_US_END_OF_STACK = 16,
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}
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pub use _Unwind_State::*;
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#[repr(C)]
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enum _Unwind_VRS_Result {
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_UVRSR_OK = 0,
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_UVRSR_NOT_IMPLEMENTED = 1,
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_UVRSR_FAILED = 2,
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}
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#[repr(C)]
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enum _Unwind_VRS_RegClass {
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_UVRSC_CORE = 0,
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_UVRSC_VFP = 1,
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_UVRSC_FPA = 2,
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_UVRSC_WMMXD = 3,
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_UVRSC_WMMXC = 4,
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}
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use _Unwind_VRS_RegClass::*;
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#[repr(C)]
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enum _Unwind_VRS_DataRepresentation {
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_UVRSD_UINT32 = 0,
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_UVRSD_VFPX = 1,
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_UVRSD_FPAX = 2,
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_UVRSD_UINT64 = 3,
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_UVRSD_FLOAT = 4,
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_UVRSD_DOUBLE = 5,
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}
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use _Unwind_VRS_DataRepresentation::*;
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pub const UNWIND_POINTER_REG: c_int = 12;
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pub const UNWIND_SP_REG: c_int = 13;
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pub const UNWIND_IP_REG: c_int = 15;
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#[cfg_attr(all(feature = "llvm-libunwind",
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any(target_os = "fuchsia", target_os = "linux")),
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link(name = "unwind", kind = "static"))]
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extern "C" {
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fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context,
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regclass: _Unwind_VRS_RegClass,
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regno: _Unwind_Word,
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repr: _Unwind_VRS_DataRepresentation,
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data: *mut c_void)
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-> _Unwind_VRS_Result;
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fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context,
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regclass: _Unwind_VRS_RegClass,
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regno: _Unwind_Word,
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repr: _Unwind_VRS_DataRepresentation,
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data: *mut c_void)
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-> _Unwind_VRS_Result;
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}
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// On Android or ARM/Linux, these are implemented as macros:
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pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word {
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let mut val: _Unwind_Word = 0;
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_Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
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&mut val as *mut _ as *mut c_void);
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val
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}
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pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
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let mut value = value;
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_Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
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&mut value as *mut _ as *mut c_void);
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}
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pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context)
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-> _Unwind_Word {
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let val = _Unwind_GetGR(ctx, UNWIND_IP_REG);
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(val & !1) as _Unwind_Word
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}
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pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context,
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value: _Unwind_Word) {
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// Propagate thumb bit to instruction pointer
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let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG) & 1;
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let value = value | thumb_state;
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_Unwind_SetGR(ctx, UNWIND_IP_REG, value);
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}
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pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context,
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ip_before_insn: *mut c_int)
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-> _Unwind_Word {
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*ip_before_insn = 0;
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_Unwind_GetIP(ctx)
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}
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// This function also doesn't exist on Android or ARM/Linux, so make it a no-op
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pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void {
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pc
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}
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}
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} // cfg_if!
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cfg_if::cfg_if! {
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if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
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// Not 32-bit iOS
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#[cfg_attr(all(feature = "llvm-libunwind",
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any(target_os = "fuchsia", target_os = "linux")),
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link(name = "unwind", kind = "static"))]
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extern "C" {
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#[unwind(allowed)]
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pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
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pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
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trace_argument: *mut c_void)
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-> _Unwind_Reason_Code;
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}
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} else {
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// 32-bit iOS uses SjLj and does not provide _Unwind_Backtrace()
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#[cfg_attr(all(feature = "llvm-libunwind",
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any(target_os = "fuchsia", target_os = "linux")),
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link(name = "unwind", kind = "static"))]
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extern "C" {
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#[unwind(allowed)]
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pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
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}
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#[inline]
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pub unsafe fn _Unwind_RaiseException(exc: *mut _Unwind_Exception) -> _Unwind_Reason_Code {
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_Unwind_SjLj_RaiseException(exc)
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}
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}
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} // cfg_if!
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cfg_if::cfg_if! {
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if #[cfg(all(windows, target_arch = "x86_64", target_env = "gnu"))] {
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// We declare these as opaque types. This is fine since you just need to
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// pass them to _GCC_specific_handler and forget about them.
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pub enum EXCEPTION_RECORD {}
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pub type LPVOID = *mut c_void;
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pub enum CONTEXT {}
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pub enum DISPATCHER_CONTEXT {}
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pub type EXCEPTION_DISPOSITION = c_int;
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type PersonalityFn = unsafe extern "C" fn(version: c_int,
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actions: _Unwind_Action,
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exception_class: _Unwind_Exception_Class,
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exception_object: *mut _Unwind_Exception,
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context: *mut _Unwind_Context)
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-> _Unwind_Reason_Code;
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extern "C" {
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pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD,
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establisherFrame: LPVOID,
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contextRecord: *mut CONTEXT,
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dispatcherContext: *mut DISPATCHER_CONTEXT,
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personality: PersonalityFn)
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-> EXCEPTION_DISPOSITION;
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}
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}
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} // cfg_if!
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