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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-01-24 10:46:17 -0300 |
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| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-02-01 14:49:46 -0300 |
| commit | 32612615c58b394c3eb09f020f31310797ad3854 (patch) | |
| tree | 3e6b65aaabd471f79a2179e75bbf64ccd1a6fa04 /NEWS | |
| parent | 254d3d5aef2fd8430c469e1938209ac100ebf132 (diff) | |
| download | glibc-32612615c58b394c3eb09f020f31310797ad3854.tar.gz glibc-32612615c58b394c3eb09f020f31310797ad3854.tar.xz glibc-32612615c58b394c3eb09f020f31310797ad3854.zip | |
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 'NEWS')
| -rw-r--r-- | NEWS | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/NEWS b/NEWS index 61acf41e66..34151fb3f3 100644 --- a/NEWS +++ b/NEWS @@ -168,6 +168,10 @@ Deprecated and removed features, and other changes affecting compatibility: removal of the LD_TRACE_PRELINKING, and LD_USE_LOAD_BIAS, environment variables and their functionality in the dynamic loader. +* The audit module interface version LAV_CURRENT is increased to enable + proper bind-now support. The loader now advertises via the la_symbind + flags that PLT trace is not possible. + Changes to build and runtime requirements: [Add changes to build and runtime requirements here] |