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	Commit message (Collapse)	Author	Age	Files	Lines
*	Preserve bound registers for pointer pass/return	Igor Zamyatin	2015-07-09	1	-0/+2
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	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.
*	Add and use sysdeps/i386/link-defines.sym	H.J. Lu	2015-07-07	1	-0/+18
	Define macros for fields in La_i86_regs and La_i86_retval and use them in dl-trampoline.S, instead of hardcoded values. * sysdeps/i386/Makefile (gen-as-const-headers)[elf]: Add link-defines.sym. * sysdeps/i386/dl-trampoline.S: Include <link-defines.h>. (_dl_runtime_profile): Use LONG_DOUBLE_SIZE, LRV_SIZE, LRV_EAX_OFFSET, LRV_EDX_OFFSET, LRV_ST0_OFFSET, LRV_ST1_OFFSET and LR_SIZE. * sysdeps/i386/link-defines.sym: New file.