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-rw-r--r--library/unwind/src/lib.rs3
-rw-r--r--library/unwind/src/libunwind.rs13
-rw-r--r--library/unwind/src/unwinding.rs105
3 files changed, 116 insertions, 5 deletions
diff --git a/library/unwind/src/lib.rs b/library/unwind/src/lib.rs
index 335bded71..eeee98f75 100644
--- a/library/unwind/src/lib.rs
+++ b/library/unwind/src/lib.rs
@@ -26,6 +26,9 @@ cfg_if::cfg_if! {
))] {
mod libunwind;
pub use libunwind::*;
+ } else if #[cfg(target_os = "xous")] {
+ mod unwinding;
+ pub use unwinding::*;
} else {
// no unwinder on the system!
// - wasm32 (not emscripten, which is "unix" family)
diff --git a/library/unwind/src/libunwind.rs b/library/unwind/src/libunwind.rs
index dba64aa74..1b5f6f9dd 100644
--- a/library/unwind/src/libunwind.rs
+++ b/library/unwind/src/libunwind.rs
@@ -103,7 +103,10 @@ pub type _Unwind_Exception_Cleanup_Fn =
// and RFC 2841
#[cfg_attr(
any(
- all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
+ all(
+ feature = "llvm-libunwind",
+ any(target_os = "fuchsia", target_os = "linux", target_os = "xous")
+ ),
all(target_os = "windows", target_env = "gnu", target_abi = "llvm")
),
link(name = "unwind", kind = "static", modifiers = "-bundle")
@@ -134,7 +137,7 @@ if #[cfg(any(target_os = "ios", target_os = "tvos", target_os = "watchos", targe
pub use _Unwind_Action::*;
#[cfg_attr(
- all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
+ all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")),
link(name = "unwind", kind = "static", modifiers = "-bundle")
)]
extern "C" {
@@ -192,7 +195,7 @@ if #[cfg(any(target_os = "ios", target_os = "tvos", target_os = "watchos", targe
pub const UNWIND_IP_REG: c_int = 15;
#[cfg_attr(
- all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
+ all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")),
link(name = "unwind", kind = "static", modifiers = "-bundle")
)]
extern "C" {
@@ -258,14 +261,14 @@ 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")),
+ all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")),
link(name = "unwind", kind = "static", modifiers = "-bundle")
)]
extern "C-unwind" {
pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
}
#[cfg_attr(
- all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
+ all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")),
link(name = "unwind", kind = "static", modifiers = "-bundle")
)]
extern "C" {
diff --git a/library/unwind/src/unwinding.rs b/library/unwind/src/unwinding.rs
new file mode 100644
index 000000000..1a4187b22
--- /dev/null
+++ b/library/unwind/src/unwinding.rs
@@ -0,0 +1,105 @@
+#![allow(nonstandard_style)]
+
+use libc::{c_int, c_void};
+
+#[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::*;
+
+#[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 use unwinding::abi::UnwindContext;
+pub use unwinding::abi::UnwindException;
+pub enum _Unwind_Context {}
+
+pub use unwinding::custom_eh_frame_finder::{
+ set_custom_eh_frame_finder, EhFrameFinder, FrameInfo, FrameInfoKind,
+};
+
+pub type _Unwind_Exception_Class = u64;
+pub type _Unwind_Word = *const u8;
+pub type _Unwind_Ptr = *const u8;
+
+pub const unwinder_private_data_size: usize = core::mem::size_of::<UnwindException>()
+ - core::mem::size_of::<_Unwind_Exception_Class>()
+ - core::mem::size_of::<_Unwind_Exception_Cleanup_Fn>();
+
+pub type _Unwind_Exception_Cleanup_Fn =
+ extern "C" fn(unwind_code: _Unwind_Reason_Code, exception: *mut _Unwind_Exception);
+
+#[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 unsafe fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr {
+ let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
+ unwinding::abi::_Unwind_GetDataRelBase(ctx) as _Unwind_Ptr
+}
+
+pub unsafe fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr {
+ let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
+ unwinding::abi::_Unwind_GetTextRelBase(ctx) as _Unwind_Ptr
+}
+
+pub unsafe fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr {
+ let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
+ unwinding::abi::_Unwind_GetRegionStart(ctx) as _Unwind_Ptr
+}
+
+pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
+ let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
+ unwinding::abi::_Unwind_SetGR(ctx, reg_index, value as usize)
+}
+
+pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word) {
+ let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
+ unwinding::abi::_Unwind_SetIP(ctx, value as usize)
+}
+
+pub unsafe fn _Unwind_GetIPInfo(
+ ctx: *mut _Unwind_Context,
+ ip_before_insn: *mut c_int,
+) -> _Unwind_Word {
+ let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
+ let ip_before_insn = unsafe { &mut *(ip_before_insn as *mut c_int) };
+ unsafe { &*(unwinding::abi::_Unwind_GetIPInfo(ctx, ip_before_insn) as _Unwind_Word) }
+}
+
+pub unsafe fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void {
+ let ctx = unsafe { &mut *(ctx as *mut UnwindContext<'_>) };
+ unwinding::abi::_Unwind_GetLanguageSpecificData(ctx)
+}
+
+pub unsafe fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code {
+ let exception = unsafe { &mut *(exception as *mut UnwindException) };
+ unsafe { core::mem::transmute(unwinding::abi::_Unwind_RaiseException(exception)) }
+}
+
+pub unsafe fn _Unwind_DeleteException(exception: *mut _Unwind_Exception) {
+ let exception = unsafe { &mut *(exception as *mut UnwindException) };
+ unsafe { unwinding::abi::_Unwind_DeleteException(exception) }
+}
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