Commit Graph

8 Commits

Author SHA1 Message Date
Konstantin Belousov
39198f15ee Add AT_STACKPROT elf aux vector. Will be used to inform rtld about the
initial stack protection set by the kernel image activator.
2011-01-07 14:22:34 +00:00
Konstantin Belousov
ee235befcb Supply some useful information to the started image using ELF aux vectors.
In particular, provide pagesize and pagesizes array, the canary value
for SSP use, number of host CPUs and osreldate.

Tested by:	marius (sparc64)
MFC after:	1 month
2010-08-17 08:55:45 +00:00
Marius Strobl
a430b967b5 Change the load base to below 2GB so PIE binaries work including when
compiled to use the Medium/Low code model, which we currently default
to for the userland. GNU/Linux has moved their default to Medium/Middle
some time ago, which probably explains why the current GNU ld(1) uses
a base in the range between 32 and 44 bits instead.

Submitted by:	kib
2009-10-18 13:08:15 +00:00
Konstantin Belousov
023063938a Define architectural load bases for PIE binaries. Addresses were selected
by looking at the bases used for non-relocatable executables by gnu ld(1),
and adjusting it slightly.

Discussed with:	bz
Reviewed by:	kan
Tested by:	bz (i386, amd64), bsam (linux)
MFC after:	some time
2009-10-10 15:31:24 +00:00
Konstantin Belousov
a4f2b2b0c6 Add AT_EXECPATH ELF auxinfo entry type. The value's a_ptr is a pointer
to the full path of the image that is being executed.
Increase AT_COUNT.

Remove no longer true comment about types used in Linux ELF binaries,
listed types contain FreeBSD-specific entries.

Reviewed by:	kan
2009-03-17 12:50:16 +00:00
Warner Losh
db3cd725a5 AT_DEBUG and AT_BRK were OBE like 10 years ago, so retire them.
Reviewed by:	peter
2008-12-17 06:56:58 +00:00
John Birrell
34408d484b The relocation definitions are now defined in the machine independent
elf_common.h so that one arch can identify relocations on another
arch.
2006-11-03 23:03:46 +00:00
Kip Macy
2405f16615 placate Grim Reaper with sun4v support 2006-10-05 06:14:28 +00:00