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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2022-01-24 10:46:17 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2022-02-01 14:49:46 -0300
commit32612615c58b394c3eb09f020f31310797ad3854 (patch)
tree3e6b65aaabd471f79a2179e75bbf64ccd1a6fa04 /bits
parent254d3d5aef2fd8430c469e1938209ac100ebf132 (diff)
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elf: Issue la_symbind for bind-now (BZ #23734)
The audit symbind callback is not called for binaries built with
-Wl,-z,now or when LD_BIND_NOW=1 is used, nor the PLT tracking callbacks
(plt_enter and plt_exit) since this would change the expected
program semantics (where no PLT is expected) and would have performance
implications (such as for BZ#15533).

LAV_CURRENT is also bumped to indicate the audit ABI change (where
la_symbind flags are set by the loader to indicate no possible PLT
trace).

To handle powerpc64 ELFv1 function descriptor, _dl_audit_symbind
requires to know whether bind-now is used so the symbol value is
updated to function text segment instead of the OPD (for lazy binding
this is done by PPC64_LOAD_FUNCPTR on _dl_runtime_resolve).

Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu,
powerpc64-linux-gnu.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'bits')
-rw-r--r--bits/link_lavcurrent.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/bits/link_lavcurrent.h b/bits/link_lavcurrent.h
index 7bfa4b9f4e..a852d41302 100644
--- a/bits/link_lavcurrent.h
+++ b/bits/link_lavcurrent.h
@@ -22,4 +22,4 @@
 #endif
 
 /* Version numbers for la_version handshake interface.  */
-#define LAV_CURRENT	1
+#define LAV_CURRENT	2