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From gcc documentation, we can read:
" ...
-fasynchronous-unwind-tables
Generate unwind table in dwarf2 format, if supported by target
machine. The table is exact at each instruction boundary, so it can be
used for stack unwinding from asynchronous events (such as debugger or
garbage collector)
..."
So it seems better rather than using -funwind-tables (glibc seems to prefer
-fasynchronous-unwind-tables).
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
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For backtrace to work is enough to use -funwind-tables instead
of -fexceptions.
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
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When libubacktrace is not enabled there is no need to link in libgcc_eh
Fixes bootstrap failures with (gcc-4.5.x) stage1 compilers that --disable-shared
Signed-off-by: Jason Woodward <jason.woodward@timesys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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Fix makefile lean target removing the old reference to the non
existing libubacktrace_ARCH_OUT variable.
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
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This reverts commit 7a080cd149c7b25d415d76506510d55b34819fc2.
This symbol is in fact different (as it is set no 'n').
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Config symbals that are not set are empty, not 'n'.
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linked too
Signed-off-by: Henning Heinold <heinold@inf.fu-berlin.de>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
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Use the initial implementation for SH4 based on dwarf for all archs.
Indeed there are not obvious reason for which it should not work in general.
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
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A new shared object, libubacktrace.so.0 is added to uClibc
to provide backtrace functions to support application self-debugging.
This set of functions requires to dynamically load libgcc_s.so so they
need to call dlopen/dlsym that are provided by libdl. For this reason
they cannot be included into libc.so.0 but are provided by a new library.
User application that wants to use backtrace needs to be compiled with
-fexceptions option and -rdynamic to get full symbols printed and must be
linked against libubacktrace.so
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
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