On 17 January 2018 at 15:55, Dave Watson <davejwat...@fb.com> wrote: >> > I didn't notice anything in particular looking at the commit logs. >> > I'll try and repro when I get a chance >> >> arm_find_proc_info() seems to start out trying eh_frame tables. Isn't >> it always best on ARM to start looking in the exidx tables? > > Sounds reasonable to me, although I'm not an arm expert. Did the > default change somewhere? I couldn't find anything looking at the > history.
I'm definitely not an expert! But the exidx tables are quite a bit smaller than the DWARF tables: on the code I'm working on, I see ~2MB on the MIPS target vs ~0.5MB on the ARM target for the unwind tables. And I don't think there's even an option in gcc to choose anything else. And this presentation by Linaro (who _are_ experts!) says "Unwinding on ARM is different - no .eh_frame but .ARM.exidx and .ARM.extab". https://wiki.linaro.org/KenWerner/Sandbox/libunwind?action=AttachFile&do=get&target=libunwind-LDS.pdf _______________________________________________ Libunwind-devel mailing list Libunwind-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/libunwind-devel
