librtld_db: Use the auxv to figure out where to look up loader symbols.

Previously, librtld_db just hardcoded /libexec/ld-elf.so, which isn't
correct for processes that aren't using the native ABI. With this change,
librtld_db can be used to inspect non-native processes; in particular,
dtrace -c now works for 32-bit executables on amd64.

MFC after:	1 month

This commit is contained in:

Mark Johnston

2016-07-30 03:05:23 +00:00

parent e04d8562b6

commit a7e13d50fe

5 changed files with 176 additions and 33 deletions

									
										Makefile.inc1
									
		+3
		-1
	
												View File
												
				@@ -2095,7 +2095,9 @@ cddl/lib/libctf__L: lib/libz__L

				# cddl/lib/libdtrace requires lib/libproc and lib/librtld_db; it's only built

				# on select architectures though (see cddl/lib/Makefile)

				.if ${MACHINE_CPUARCH} != "sparc64"

				_prebuild_libs+=	lib/libproc lib/librtld_db

				_prebuild_libs+=	lib/libprocstat lib/libproc lib/librtld_db

				lib/libproc__L: lib/libprocstat__L

				lib/librtld_db__L: lib/libprocstat__L

				.endif

				.if ${MK_CRYPT} != "no"