Mark Johnston <ma...@freebsd.org> writes: > Author: markj > Date: Wed Feb 18 03:54:54 2015 > New Revision: 278934 > URL: https://svnweb.freebsd.org/changeset/base/278934 > > Log: > Remove drti.o's dependency on libelf. This makes it possible to add DTrace > probes to userland programs and libraries without also needing to link > libelf. > > dtrace -G places the __SUNW_dof symbol at the beginning of the DOF (DTrace > probe and provider metdata) section in the generated object file; drti.o > now just uses this symbol to locate the section. A complication occurs > when multiple dtrace-generated object files are linked together, since the > __SUNW_dof symbol defined in each file is global. This is handled by > using objcopy(1) to convert __SUNW_dof to a local symbol once drti.o has > been linked with the generated object file. Upstream, this is done using a > linker feature not present in GNU ld. > > Differential Revision: https://reviews.freebsd.org/D1757 > Reviewed by: rpaulo > MFC after: 1 month > Relnotes: yes
Any reason this wasn't MFC'd yet? It would serve as incentive to *not* add FreeBSD-specific conditionals for building dtrace probes in various upstream projects.
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