41 lines
1.8 KiB
Diff
41 lines
1.8 KiB
Diff
[PATCH] ld.so: ldd crashes when __LDSO_SEARCH_INTERP_PATH__ is not #defined
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Since b65c7b2c79debcb9017e31913e01eeaa280106fb, the implicit search path
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can be disabled by not #defining __LDSO_SEARCH_INTERP_PATH__. This
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causes _dl_ldsopath to never be set, so it remains NULL. _dl_ldsopath is
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still used when __LDSO_LDD_SUPPORT__ is #defined, to strip the path off
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of the beginning of the absolute path to the ld.so interpreter in use
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for printing. The _dl_strlen will crash with a NULL argument.
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Rather than relying on _dl_ldsopath, this change causes ldd to compute
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the interpreter's basename directly.
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glibc ld.so seems to print the full path to the interpreter without
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any computed basename or =>. I personally prefer glibc's behavior, but
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to preserve backwards compatibility with uClibc ld.so, the existing
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format with the computed basename, =>, and full path is used here. This
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enables simpler (and unchanged) text processing in a pipeline.
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Signed-off-by: Mark Mentovai <mark at moxienet.com>
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---
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ldso/ldso/ldso.c | 12 +++++++++---
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--- a/ldso/ldso/ldso.c
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+++ b/ldso/ldso/ldso.c
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@@ -925,9 +925,15 @@ void _dl_get_ready_to_run(struct elf_res
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#ifdef __LDSO_LDD_SUPPORT__
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/* End of the line for ldd.... */
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if (trace_loaded_objects) {
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- _dl_dprintf(1, "\t%s => %s (%x)\n",
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- rpnt->dyn->libname + _dl_strlen(_dl_ldsopath) + 1,
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- rpnt->dyn->libname, DL_LOADADDR_BASE(rpnt->dyn->loadaddr));
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+ /* glibc ld.so/ldd would just do
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+ * _dl_dprintf(1, "\t%s (%x)\n", rpnt->dyn->libname,
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+ * DL_LOADADDR_BASE(rpnt->dyn->loadaddr));
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+ * but uClibc has always used the => format. */
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+ char *ptmp = _dl_strrchr(rpnt->dyn->libname, '/');
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+ if (ptmp != rpnt->dyn->libname)
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+ ++ptmp;
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+ _dl_dprintf(1, "\t%s => %s (%x)\n", ptmp, rpnt->dyn->libname,
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+ DL_LOADADDR_BASE(rpnt->dyn->loadaddr));
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_dl_exit(0);
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}
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#endif
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