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| author | Igor Zamyatin <igor.zamyatin@intel.com> | 2015-07-09 06:50:12 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2015-08-02 06:54:17 -0700 |
| commit | 9e4fc7f67f6695f294ae759a6b540f5d08a56f0c (patch) | |
| tree | dfe6eebc992c2e7d69c7611aa05c3ed43b157a95 /ChangeLog.old-ports-ia64 | |
| parent | b15f277bac14482c8b2dda4931ebf919644932fa (diff) | |
| download | glibc-9e4fc7f67f6695f294ae759a6b540f5d08a56f0c.tar.gz glibc-9e4fc7f67f6695f294ae759a6b540f5d08a56f0c.tar.xz glibc-9e4fc7f67f6695f294ae759a6b540f5d08a56f0c.zip | |
Preserve bound registers for pointer pass/return
We need to save/restore bound registers and add a BND prefix before branches in _dl_runtime_profile so that bound registers for pointer pass and return are preserved when LD_AUDIT is used. [BZ #18134] * sysdeps/i386/configure.ac: Set HAVE_MPX_SUPPORT. * sysdeps/i386/configure: Regenerated. * sysdeps/i386/dl-trampoline.S (PRESERVE_BND_REGS_PREFIX): New. (_dl_runtime_profile): Save and restore Intel MPX return bound registers when calling _dl_call_pltexit. Add PRESERVE_BND_REGS_PREFIX before return. * sysdeps/i386/link-defines.sym (LRV_BND0_OFFSET): New. (LRV_BND1_OFFSET): Likewise. * sysdeps/x86/bits/link.h (La_i86_retval): Add lrv_bnd0 and lrv_bnd1. * sysdeps/x86_64/dl-trampoline.S (_dl_runtime_profile): Fix typo in bndmov encoding. * sysdeps/x86_64/dl-trampoline.h: Properly save and restore Intel MPX bound registers. Add PRESERVE_BND_REGS_PREFIX before branch instructions to preserve bounds.
Diffstat (limited to 'ChangeLog.old-ports-ia64')
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