forked from M-Labs/artiq-zynq
Egor Savkin
a519d24074
Co-authored-by: Egor Savkin <es@m-labs.hk> Co-committed-by: Egor Savkin <es@m-labs.hk>
284 lines
9.9 KiB
Rust
284 lines
9.9 KiB
Rust
#![allow(nonstandard_style)]
|
|
|
|
use libc::{c_int, c_void, uintptr_t};
|
|
|
|
#[repr(C)]
|
|
#[derive(Debug, Copy, Clone, PartialEq)]
|
|
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 EHABI
|
|
}
|
|
pub use _Unwind_Reason_Code::*;
|
|
|
|
pub type _Unwind_Exception_Class = u64;
|
|
pub type _Unwind_Word = uintptr_t;
|
|
pub type _Unwind_Ptr = uintptr_t;
|
|
pub type _Unwind_Trace_Fn = extern "C" fn(ctx: *mut _Unwind_Context, arg: *mut c_void) -> _Unwind_Reason_Code;
|
|
|
|
#[cfg(target_arch = "x86")]
|
|
pub const unwinder_private_data_size: usize = 5;
|
|
|
|
#[cfg(target_arch = "x86_64")]
|
|
pub const unwinder_private_data_size: usize = 6;
|
|
|
|
#[cfg(all(target_arch = "arm", not(target_os = "ios")))]
|
|
pub const unwinder_private_data_size: usize = 20;
|
|
|
|
#[cfg(all(target_arch = "arm", target_os = "ios"))]
|
|
pub const unwinder_private_data_size: usize = 5;
|
|
|
|
#[cfg(target_arch = "aarch64")]
|
|
pub const unwinder_private_data_size: usize = 2;
|
|
|
|
#[cfg(target_arch = "mips")]
|
|
pub const unwinder_private_data_size: usize = 2;
|
|
|
|
#[cfg(target_arch = "mips64")]
|
|
pub const unwinder_private_data_size: usize = 2;
|
|
|
|
#[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
|
|
pub const unwinder_private_data_size: usize = 2;
|
|
|
|
#[cfg(target_arch = "s390x")]
|
|
pub const unwinder_private_data_size: usize = 2;
|
|
|
|
#[cfg(target_arch = "sparc64")]
|
|
pub const unwinder_private_data_size: usize = 2;
|
|
|
|
#[cfg(target_arch = "riscv64")]
|
|
pub const unwinder_private_data_size: usize = 2;
|
|
|
|
#[cfg(target_os = "emscripten")]
|
|
pub const unwinder_private_data_size: usize = 20;
|
|
|
|
#[cfg(all(target_arch = "hexagon", target_os = "linux"))]
|
|
pub const unwinder_private_data_size: usize = 35;
|
|
|
|
#[repr(C)]
|
|
pub struct _Unwind_Exception {
|
|
pub exception_class: _Unwind_Exception_Class,
|
|
pub exception_cleanup: _Unwind_Exception_Cleanup_Fn,
|
|
pub 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: *mut _Unwind_Exception);
|
|
#[cfg_attr(
|
|
all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
|
|
link(name = "unwind", kind = "static")
|
|
)]
|
|
extern "C" {
|
|
#[unwind(allowed)]
|
|
pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !;
|
|
pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception);
|
|
pub fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void;
|
|
pub fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
|
|
pub fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
|
|
pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
|
|
}
|
|
|
|
cfg_if::cfg_if! {
|
|
if #[cfg(all(any(target_os = "ios", target_os = "netbsd", not(target_arch = "arm"))))] {
|
|
// Not ARM EHABI
|
|
#[repr(C)]
|
|
#[derive(Copy, Clone, PartialEq)]
|
|
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,
|
|
}
|
|
pub use _Unwind_Action::*;
|
|
|
|
#[cfg_attr(all(feature = "llvm-libunwind",
|
|
any(target_os = "fuchsia", target_os = "linux")),
|
|
link(name = "unwind", kind = "static"))]
|
|
extern "C" {
|
|
pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word;
|
|
pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word);
|
|
pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word;
|
|
pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word);
|
|
pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int)
|
|
-> _Unwind_Word;
|
|
pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
|
|
}
|
|
|
|
} else {
|
|
// ARM EHABI
|
|
#[repr(C)]
|
|
#[derive(Copy, Clone, PartialEq)]
|
|
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,
|
|
}
|
|
pub use _Unwind_State::*;
|
|
|
|
#[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,
|
|
}
|
|
use _Unwind_VRS_RegClass::*;
|
|
#[repr(C)]
|
|
enum _Unwind_VRS_DataRepresentation {
|
|
_UVRSD_UINT32 = 0,
|
|
_UVRSD_VFPX = 1,
|
|
_UVRSD_FPAX = 2,
|
|
_UVRSD_UINT64 = 3,
|
|
_UVRSD_FLOAT = 4,
|
|
_UVRSD_DOUBLE = 5,
|
|
}
|
|
use _Unwind_VRS_DataRepresentation::*;
|
|
|
|
pub const UNWIND_POINTER_REG: c_int = 12;
|
|
pub const UNWIND_SP_REG: c_int = 13;
|
|
pub const UNWIND_IP_REG: c_int = 15;
|
|
|
|
#[cfg_attr(all(feature = "llvm-libunwind",
|
|
any(target_os = "fuchsia", target_os = "linux")),
|
|
link(name = "unwind", kind = "static"))]
|
|
extern "C" {
|
|
fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context,
|
|
regclass: _Unwind_VRS_RegClass,
|
|
regno: _Unwind_Word,
|
|
repr: _Unwind_VRS_DataRepresentation,
|
|
data: *mut c_void)
|
|
-> _Unwind_VRS_Result;
|
|
|
|
fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context,
|
|
regclass: _Unwind_VRS_RegClass,
|
|
regno: _Unwind_Word,
|
|
repr: _Unwind_VRS_DataRepresentation,
|
|
data: *mut c_void)
|
|
-> _Unwind_VRS_Result;
|
|
}
|
|
|
|
// On Android or ARM/Linux, these are implemented as macros:
|
|
|
|
pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word {
|
|
let mut val: _Unwind_Word = 0;
|
|
_Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
|
|
&mut val as *mut _ as *mut c_void);
|
|
val
|
|
}
|
|
|
|
pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
|
|
let mut value = value;
|
|
_Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
|
|
&mut value as *mut _ as *mut c_void);
|
|
}
|
|
|
|
pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context)
|
|
-> _Unwind_Word {
|
|
let val = _Unwind_GetGR(ctx, UNWIND_IP_REG);
|
|
(val & !1) as _Unwind_Word
|
|
}
|
|
|
|
pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context,
|
|
value: _Unwind_Word) {
|
|
// Propagate thumb bit to instruction pointer
|
|
let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG) & 1;
|
|
let value = value | thumb_state;
|
|
_Unwind_SetGR(ctx, UNWIND_IP_REG, value);
|
|
}
|
|
|
|
pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context,
|
|
ip_before_insn: *mut c_int)
|
|
-> _Unwind_Word {
|
|
*ip_before_insn = 0;
|
|
_Unwind_GetIP(ctx)
|
|
}
|
|
|
|
// This function also doesn't exist on Android or ARM/Linux, so make it a no-op
|
|
pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void {
|
|
pc
|
|
}
|
|
}
|
|
} // cfg_if!
|
|
|
|
cfg_if::cfg_if! {
|
|
if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
|
|
// Not 32-bit iOS
|
|
#[cfg_attr(all(feature = "llvm-libunwind",
|
|
any(target_os = "fuchsia", target_os = "linux")),
|
|
link(name = "unwind", kind = "static"))]
|
|
extern "C" {
|
|
#[unwind(allowed)]
|
|
pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
|
|
pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
|
|
trace_argument: *mut c_void)
|
|
-> _Unwind_Reason_Code;
|
|
}
|
|
} else {
|
|
// 32-bit iOS uses SjLj and does not provide _Unwind_Backtrace()
|
|
#[cfg_attr(all(feature = "llvm-libunwind",
|
|
any(target_os = "fuchsia", target_os = "linux")),
|
|
link(name = "unwind", kind = "static"))]
|
|
extern "C" {
|
|
#[unwind(allowed)]
|
|
pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
|
|
}
|
|
|
|
#[inline]
|
|
pub unsafe fn _Unwind_RaiseException(exc: *mut _Unwind_Exception) -> _Unwind_Reason_Code {
|
|
_Unwind_SjLj_RaiseException(exc)
|
|
}
|
|
}
|
|
} // cfg_if!
|
|
|
|
cfg_if::cfg_if! {
|
|
if #[cfg(all(windows, target_arch = "x86_64", target_env = "gnu"))] {
|
|
// We declare these as opaque types. This is fine since you just need to
|
|
// pass them to _GCC_specific_handler and forget about them.
|
|
pub enum EXCEPTION_RECORD {}
|
|
pub type LPVOID = *mut c_void;
|
|
pub enum CONTEXT {}
|
|
pub enum DISPATCHER_CONTEXT {}
|
|
pub type EXCEPTION_DISPOSITION = c_int;
|
|
type PersonalityFn = unsafe extern "C" fn(version: c_int,
|
|
actions: _Unwind_Action,
|
|
exception_class: _Unwind_Exception_Class,
|
|
exception_object: *mut _Unwind_Exception,
|
|
context: *mut _Unwind_Context)
|
|
-> _Unwind_Reason_Code;
|
|
|
|
extern "C" {
|
|
pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD,
|
|
establisherFrame: LPVOID,
|
|
contextRecord: *mut CONTEXT,
|
|
dispatcherContext: *mut DISPATCHER_CONTEXT,
|
|
personality: PersonalityFn)
|
|
-> EXCEPTION_DISPOSITION;
|
|
}
|
|
}
|
|
} // cfg_if!
|
|
|
|
#[no_mangle]
|
|
extern "C" fn abort() {
|
|
panic!("Abort!");
|
|
}
|