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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Unwind library interface
#![allow(non_camel_case_types)]
#![allow(dead_code)] // these are just bindings
use libc;
#[cfg(not(target_arch = "arm"))]
#[repr(C)]
pub enum _Unwind_Action
{
_UA_SEARCH_PHASE = 1,
_UA_CLEANUP_PHASE = 2,
_UA_HANDLER_FRAME = 4,
_UA_FORCE_UNWIND = 8,
_UA_END_OF_STACK = 16,
}
#[cfg(target_arch = "arm")]
#[repr(C)]
pub enum _Unwind_State
{
_US_VIRTUAL_UNWIND_FRAME = 0,
_US_UNWIND_FRAME_STARTING = 1,
_US_UNWIND_FRAME_RESUME = 2,
_US_ACTION_MASK = 3,
_US_FORCE_UNWIND = 8,
_US_END_OF_STACK = 16
}
#[repr(C)]
pub enum _Unwind_Reason_Code {
_URC_NO_REASON = 0,
_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
_URC_FATAL_PHASE2_ERROR = 2,
_URC_FATAL_PHASE1_ERROR = 3,
_URC_NORMAL_STOP = 4,
_URC_END_OF_STACK = 5,
_URC_HANDLER_FOUND = 6,
_URC_INSTALL_CONTEXT = 7,
_URC_CONTINUE_UNWIND = 8,
_URC_FAILURE = 9, // used only by ARM EABI
}
pub type _Unwind_Exception_Class = u64;
pub type _Unwind_Word = libc::uintptr_t;
#[cfg(target_arch = "x86")]
pub static unwinder_private_data_size: int = 5;
#[cfg(target_arch = "x86_64")]
pub static unwinder_private_data_size: int = 2;
#[cfg(target_arch = "arm")]
pub static unwinder_private_data_size: int = 20;
#[cfg(target_arch = "mips")]
pub static unwinder_private_data_size: int = 2;
pub struct _Unwind_Exception {
exception_class: _Unwind_Exception_Class,
exception_cleanup: _Unwind_Exception_Cleanup_Fn,
private: [_Unwind_Word, ..unwinder_private_data_size],
}
pub enum _Unwind_Context {}
pub type _Unwind_Exception_Cleanup_Fn =
extern "C" fn(unwind_code: _Unwind_Reason_Code,
exception: *_Unwind_Exception);
pub type _Unwind_Trace_Fn =
extern "C" fn(ctx: *_Unwind_Context,
arg: *libc::c_void) -> _Unwind_Reason_Code;
#[cfg(target_os = "linux")]
#[cfg(target_os = "freebsd")]
#[cfg(target_os = "win32")]
#[link(name = "gcc_s")]
extern {}
#[cfg(target_os = "android")]
#[link(name = "gcc")]
extern {}
extern "C" {
pub fn _Unwind_RaiseException(exception: *_Unwind_Exception)
-> _Unwind_Reason_Code;
pub fn _Unwind_DeleteException(exception: *_Unwind_Exception);
pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
trace_argument: *libc::c_void)
-> _Unwind_Reason_Code;
#[cfg(not(target_os = "android"),
not(target_os = "linux", target_arch = "arm"))]
pub fn _Unwind_GetIP(ctx: *_Unwind_Context) -> libc::uintptr_t;
#[cfg(not(target_os = "android"),
not(target_os = "linux", target_arch = "arm"))]
pub fn _Unwind_FindEnclosingFunction(pc: *libc::c_void) -> *libc::c_void;
}
// On android, the function _Unwind_GetIP is a macro, and this is the expansion
// of the macro. This is all copy/pasted directly from the header file with the
// definition of _Unwind_GetIP.
#[cfg(target_os = "android")]
#[cfg(target_os = "linux", target_arch = "arm")]
pub unsafe fn _Unwind_GetIP(ctx: *_Unwind_Context) -> libc::uintptr_t {
#[repr(C)]
enum _Unwind_VRS_Result {
_UVRSR_OK = 0,
_UVRSR_NOT_IMPLEMENTED = 1,
_UVRSR_FAILED = 2,
}
#[repr(C)]
enum _Unwind_VRS_RegClass {
_UVRSC_CORE = 0,
_UVRSC_VFP = 1,
_UVRSC_FPA = 2,
_UVRSC_WMMXD = 3,
_UVRSC_WMMXC = 4,
}
#[repr(C)]
enum _Unwind_VRS_DataRepresentation {
_UVRSD_UINT32 = 0,
_UVRSD_VFPX = 1,
_UVRSD_FPAX = 2,
_UVRSD_UINT64 = 3,
_UVRSD_FLOAT = 4,
_UVRSD_DOUBLE = 5,
}
type _Unwind_Word = libc::c_uint;
extern {
fn _Unwind_VRS_Get(ctx: *_Unwind_Context,
klass: _Unwind_VRS_RegClass,
word: _Unwind_Word,
repr: _Unwind_VRS_DataRepresentation,
data: *mut libc::c_void) -> _Unwind_VRS_Result;
}
let mut val: _Unwind_Word = 0;
let ptr = &mut val as *mut _Unwind_Word;
let _ = _Unwind_VRS_Get(ctx, _UVRSC_CORE, 15, _UVRSD_UINT32,
ptr as *mut libc::c_void);
(val & !1) as libc::uintptr_t
}
// This function also doesn't exist on android or arm/linux, so make it a no-op
#[cfg(target_os = "android")]
#[cfg(target_os = "linux", target_arch = "arm")]
pub unsafe fn _Unwind_FindEnclosingFunction(pc: *libc::c_void) -> *libc::c_void {
pc
}
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