5 ** Iteration of unwind register states support
6 Doug Moore <dougm@rice.edu>
7 ** Freebsd/Armv6 support
8 Konstantin Belousov <kib@freebsd.org>
9 ** Many, many dwarf bugfixes
10 ** Mips remote unwind support
11 ** aarch64 ptrace support
16 ** dwarf parsing improvements
17 ** Fast stacktraces for aarch64 & arm
23 ** coredump unwind support
25 ** Improved support for PowerPC, ARM
26 ** Lots of cleanups, perf tweaks
31 ** Fast unwind (rbp, rsp, rip only) on x86_64 with a fallback to
32 slow code path (Lassi Tuura)
33 ** Improved local and remote unwinding on ARM (Ken Werner)
34 ** Testing, stability and many fixes on x86 (Paul Pluzhnikov)
35 ** FreeBSD port and clean separation of OS specific bits
37 ** Thanks for all the bug reports, contributions and testing!
41 ** Greatly improved x86-64 support thanks to Arun Sharma.
42 ** Support for PPC64 added by Jose Flavio Aguilar Paulino.
46 ** Fix address-leak triggered by invalid byte-order. Fixed by Andreas Schwab.
47 ** On ia64, get_static_proc_name() no longer uses a weak reference to
48 _Uelf64_get_proc_name(), since that was causing problems with archive
49 libraries and no longer served any apparent purpose. Fixed by
54 ** Fix a typo in the man-page of unw_create_addr_space().
55 ** Fix an off-by-1 bug in the handling of the dynamic ALIAS directive
56 for ia64. Reported by Todd L. Miller.
57 ** Fix a bug in libunwind-ptrace which could cause crash due to extraneous
62 ** Fix a typo in _ReadSLEB.c which caused hangs when throwing exceptions
63 from Intel ICC-compiled programs. Reported by Tommy Hoffner.
67 ** Make it possible to link against libunwind-ia64.a only (i.e., without
68 requiring libunwind.a as well). This keeps apps which need only
69 remote unwinding cleaner, since they logically have no dependency
71 ** Dont link against libatomic_ops for now. Due to a packaging bug on
72 Debian, linking against this library causes libunwind.so to get
73 a dependency on libatomic_ops.so, which is not at all what we want.
74 Fortunately, we don't have to link against that library on x86 or
75 ia64 since the library is strictly needed only for platforms with
76 poor atomic operation support. Once the libatomic_ops package is fixed,
77 we can re-enable linking against libatomic_ops.
81 ** Fixed bug which caused _UPT_get_dyn_info_list_addr() to sometimes fail
82 needlessly. Found by Todd L. Miller.
84 ** When using GCC to build libunwind on ia64, libunwind.so had an
85 unresolved reference to __divdi3. This is undesirable since it
86 creates an implicit dependency on libgcc. This problem has been
87 fixed in the 0.98.2 release by explicitly linking against libgcc.a
88 when building libunwind.
92 ** Fixed a bug which caused "make install" to install libunwind-common.h.in
93 instead of libunwind-common.h.
94 ** Fixed a bug in the ia64 {sig,}longjmp() which showed on
95 SuSE Linux 9 because it's using a newer compiler & the EPC-based system
97 ** Fixed incorrect offsets in tests/ia64-test-nat-asm.S.
98 Warning: you'll need a GNU assembler dated later than 21-Sep-2004 to
99 get this file translated correctly. With an old assembler, "make check"
100 will get lots of failures when running Gia64-test-nat or Lia64-test-nat!
101 ** Convert tests/bt into a full-blown test-case. It's designed to
102 trigger a (rarely-encountered) bug in the GNU assembler on ia64.
103 The assembler has been fixed and once the libraries (libc etc)
104 have been rebuilt, this test will pass.
105 ** Added test-case tests/run-ptrace-misc which, on ia64, triggers a bug in
106 current GCC (including v3.4.2) which causes bad unwind info.
110 ** Update libunwind to be compliant with the updated/expanded
111 ia64 unwind specificiation by HJ Lu [1]. This is needed for
112 GCC 3.4 compatibility.
114 [1] http://www.kernel.org/pub/linux/devel/gcc/unwind/
116 ** Initial support for x86-64 has been added courtesy of Max Asbock.
117 Along with this came a bunch of DWARF2 unwinder fixes.
119 ** A new rountine unw_strerror() has been added courtesy of
122 ** Including <libunwind.h> now defines 4 macros that can be used
123 to determine the version number of libunwind. Specifically,
124 UNW_VERSION_MAJOR, UNW_VERSION_MINOR, UNW_VERSION, and
125 UNW_VERSION_CODE are defined by the header now.
128 *** Fix a memory-leak in _UPT_get_dyn_info_list_addr() courtesy of Ed Connell.
129 *** Fix a crash in libunwind-ptrace courtesy of Mark Young.
130 *** Fix a bug in ia64-version of unw_init_remote() which prevented
131 it from working correctly for the local address space. Reported by
133 *** Many other small and not so small fixes.
137 ** unw_get_proc_name() may now be called from signal-handler.
139 ** The ptrace-helper routines are now declared in libunwind-ptrace.h.
140 Applications which use ptrace-based unwinding should include
141 <libunwind-ptrace.h> to get the _UPT_*() routines declared.
143 ** libunwind has been split into a "local-only" and a "generic" versions.
144 The former is optimized for local unwinding (within a process) and
145 is called libunwind.so (shared version) or libunwind.a (archive
146 version). The generic version is not limited to unwinding within a
147 process and is called libunwind-generic.so (shared version)
148 libunwind-generic.a (archive version). Similarly, the ptrace()
149 support has been separated out into a convenience library called
150 libunwind-ptrace.a. For the most part, backwards-compatibility
151 is retained. However, when building an application which uses
152 libunwind, it may be necessary to change the linker command-line
153 as shown in the table below:
155 Application which does: Before v0.97: With v0.97:
156 ----------------------- ------------- -----------
157 local unwinding only: -lunwind -lunwind
158 remote unwinding: -lunwind -lunwind-generic
159 cross unwinding: -lunwind-PLAT -lunwind-PLAT
160 ptrace-based unwinding: -lunwind -lunwind-ptrace -lunwind-generic
162 The motivation for this splitting is to keep libunwind.so as minimal
163 as possible. This library will eventually be loaded by most (if not
164 all) executables and hence it is important to ensure that it can
165 be loaded as quickly as possible.
167 ** unw_getcontext() tuned on IA-64.
169 The unw_getcontext() routine used to be provided by (GNU) libc
170 (getcontext()). This caused unnecessary overhead (e.g., an
171 unnecessary system-call to sigprocmask()). The new
172 unw_getcontext() only does the work really needed for libunwind and
173 hence performs much better. However, this change implies that
174 programs linked against libunwind v0.97 won't be
175 backwards-compatible with earlier versions (there would be an
176 unresolved symbol for _Uia64_getcontext()).
178 ** Fix NaT-bit handling on IA-64.
180 New test-cases have been added to test the handling of the NaT bit
181 (and floating-point NaT values) and all discovered/known bugs have
184 ** Initial DWARF-based unwinder for x86.
186 There is a beginning for a DWARF-based unwinder for x86. Work for
187 x86-64-support based on this DWARF unwinder is currently underway
188 at IBM and it is expected that this support will be merged into the
194 ** _Unwind_*() routines defined by the C++ ABI are now included in
200 ** Bigger, better, faster, or so the theory goes.
205 ** More bug-fixes & improved HP-UX support.
210 ** Bug-fix release. IA-64 unwinder can now be built with Intel compiler (ECC).
215 ** Lots of documentation updates
216 ** Some portability fixes.
221 ** The libunwind API is mostly feature-complete at this point (hence the
222 version jump from v0.2 to v0.9).
227 ** Automated configuration/build with autoconf and automake.
228 ** Added support for building libunwind as a shared library.
229 ** Added support for remote unwinding.
230 ** Added support for cross-building.
231 ** Added two new routines to the API:
234 ** Added multi-architecture supports (lets a single application use
235 the unwind libraries for multiple target architectures; this is useful,
236 e.g., useful for building a debugger that can support multiple targets
237 such as x86, ia64, etc.)
242 ** Added support for exception handling.
247 ** It's a brand new package.