From 6a7d3fd0b5e4f4f71b57e39fb0d1613aca2db72e Mon Sep 17 00:00:00 2001 From: Andrew Cagney Date: Thu, 8 Apr 2004 20:03:52 +0000 Subject: 2004-04-08 Andrew Cagney * frame-unwind.c (struct frame_unwind_table, frame_unwind_init) (frame_unwind_prepend_unwinder, frame_unwind_append_sniffer) (frame_unwind_find_by_frame): Re-implement the unwind code so that it can both prepend and append sniffers. Replace frame_unwind_register_unwinder with frame_unwind_prepend_unwinder. * tramp-frame.c (tramp_frame_append): Use frame_unwind_prepend_unwinder. * frame-unwind.h (frame_unwind_prepend_unwinder): Replace frame_unwind_register_unwinder. * tramp-frame.h (tramp_frame_prepend_unwinder): Rename tramp_frame_append. * tramp-frame.c (tramp_frame_prepend_unwinder): Update. * mips-linux-tdep.c (mips_linux_init_abi, mips_linux_init_abi) (mips_linux_init_abi): Update. --- gdb/frame-unwind.h | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'gdb/frame-unwind.h') diff --git a/gdb/frame-unwind.h b/gdb/frame-unwind.h index 49f28896ffe..12d6dd240ed 100644 --- a/gdb/frame-unwind.h +++ b/gdb/frame-unwind.h @@ -131,11 +131,14 @@ struct frame_unwind frame_sniffer_ftype *sniffer; }; -/* Register a frame unwinder, _appending_ it to the end of the search - list. */ -extern void frame_unwind_register_unwinder (struct gdbarch *gdbarch, - const struct frame_unwind *unwinder); - +/* Register a frame unwinder, _prepending_ it to the front of the + search list (so it is sniffed before previously registered + unwinders). By using a prepend, later calls can install unwinders + that override earlier calls. This allows, for instance, an OSABI + to install a a more specific sigtramp unwinder that overrides the + traditional brute-force unwinder. */ +extern void frame_unwind_prepend_unwinder (struct gdbarch *gdbarch, + const struct frame_unwind *unwinder); /* Given the NEXT frame, take a wiff of THIS frame's registers (namely the PC and attributes) and if it is the applicable unwinder return -- cgit v1.2.1