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| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | NEWS | 10 |
2 files changed, 14 insertions, 0 deletions
@@ -1,3 +1,7 @@ +2014-08-12 Roland McGrath <roland@hack.frob.com> + + * NEWS: Mention x86-64 ld.so use of Intel MPX instructions. + 2014-08-12 Bernard Ogden <bernie.ogden@linaro.org> [BZ #16892] @@ -97,6 +97,16 @@ Version 2.20 silently replaced with the "C" locale when running in AT_SECURE mode (e.g., in a SUID program). This is no longer necessary because of the additional checks. + +* On x86-64, the dynamic linker's lazy-binding support is now compatible + with application code using Intel MPX instructions. (With all previous + versions, the MPX register state could be clobbered when making calls + into or out of a shared library.) Note that while the new dynamic + linker is compatible with all known x86 hardware whether or not it + supports Intel MPX, some x86 instruction-set emulators might fail to + handle the new instruction encodings. This is known to affect Valgrind + versions up through 3.9 (but will be fixed in the forthcoming 3.10 + release), and might affect other tools that do instruction emulation. Version 2.19 |