bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Remove custom frame info registration on i686-pc-windows-gnu

Browse source 
The indirection is no longer needed since we always link to libgcc
even when the panic_abort runtime is used. Instead we can just call
the libgcc functions directly.
This commit is contained in:
Amanieu d'Antras 2022-02-09 14:16:57 +00:00
parent 5ff0876694
commit c110329f25
4 changed files with 14 additions and 51 deletions
Download patch file Download diff file Expand all files Collapse all files

19
library/rtstartup/rsbegin.rs
View file

@ -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