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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:06:31 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:06:31 +0000
commit2ff14448863ac1a1dd9533461708e29aae170c2d (patch)
tree85b9fea2bbfe3f06473cfa381eed11f273b57c5c /library/rtstartup
parentAdding debian version 1.64.0+dfsg1-1. (diff)
downloadrustc-2ff14448863ac1a1dd9533461708e29aae170c2d.tar.xz
rustc-2ff14448863ac1a1dd9533461708e29aae170c2d.zip
Adding debian version 1.65.0+dfsg1-2.debian/1.65.0+dfsg1-2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'library/rtstartup')
-rw-r--r--library/rtstartup/rsbegin.rs19
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