diff options
Diffstat (limited to 'library/rtstartup/rsbegin.rs')
| -rw-r--r-- | library/rtstartup/rsbegin.rs | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/library/rtstartup/rsbegin.rs b/library/rtstartup/rsbegin.rs index c6a4548ec..1df0c8970 100644 --- a/library/rtstartup/rsbegin.rs +++ b/library/rtstartup/rsbegin.rs @@ -35,6 +35,16 @@ pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) { drop_in_place(to_drop); } +// Frame unwind info registration +// +// Each module's image contains a frame unwind info section (usually +// ".eh_frame"). When a module is loaded/unloaded into the process, the +// unwinder must be informed about the location of this section in memory. The +// methods of achieving that vary by the platform. On some (e.g., Linux), the +// unwinder can discover unwind info sections on its own (by dynamically +// enumerating currently loaded modules via the dl_iterate_phdr() API and +// finding their ".eh_frame" sections); Others, like Windows, require modules +// to actively register their unwind info sections via unwinder API. #[cfg(all(target_os = "windows", target_arch = "x86", target_env = "gnu"))] pub mod eh_frames { #[no_mangle] @@ -62,20 +72,19 @@ pub mod eh_frames { } // Unwind info registration/deregistration routines. - // See the docs of libpanic_unwind. extern "C" { - fn rust_eh_register_frames(eh_frame_begin: *const u8, object: *mut u8); - fn rust_eh_unregister_frames(eh_frame_begin: *const u8, object: *mut u8); + fn __register_frame_info(eh_frame_begin: *const u8, object: *mut u8); + fn __deregister_frame_info(eh_frame_begin: *const u8, object: *mut u8); } unsafe extern "C" fn init() { // register unwind info on module startup - rust_eh_register_frames(&__EH_FRAME_BEGIN__ as *const u8, &mut OBJ as *mut _ as *mut u8); + __register_frame_info(&__EH_FRAME_BEGIN__ as *const u8, &mut OBJ as *mut _ as *mut u8); } unsafe extern "C" fn uninit() { // unregister on shutdown - rust_eh_unregister_frames(&__EH_FRAME_BEGIN__ as *const u8, &mut OBJ as *mut _ as *mut u8); + __deregister_frame_info(&__EH_FRAME_BEGIN__ as *const u8, &mut OBJ as *mut _ as *mut u8); } // MinGW-specific init/uninit routine registration |