11 Commits

Author SHA1 Message Date
kib
3547dab066 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
kib
7695aca762 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
imp
39a3668dcc 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
jb
bf543444cf PR:
Submitted by:
Reviewed by:
Approved by:
Obtained from:
MFC after:
Security:
Move the relocation definitions to the common elf header so that DTrace
can use them on one architecture targeted to a different one.

Add the additional ELF types defines in Sun's "Linker and Libraries"
manual.
2006-10-04 21:37:10 +00:00
cognet
ccd457af25 Use ELFDATA2MSB if we're building big endian.
Noticed by:	Oleksandr Tymoshenko <gonzo freebsd org>
2006-08-24 23:00:03 +00:00
cognet
792c8e2f49 Use a magic number to know we were started from the elf wrapper.
Add a dummy _start function to make the non-elf version of the wrapper work.
2005-11-24 02:27:55 +00:00
cognet
98a436bcc5 Add the Elf32_Auxinfo declaretion.
Define AT_*.
(Maybe some of this could go in a MI header ?)
2004-05-04 22:21:36 +00:00
peter
8ecb3577d8 Add sysentvec->sv_fixlimits() hook so that we can catch cases on 64 bit
systems where the data/stack/etc limits are too big for a 32 bit process.

Move the 5 or so identical instances of ELF_RTLD_ADDR() into imgact_elf.c.

Supply an ia32_fixlimits function.  Export the clip/default values to
sysctl under the compat.ia32 heirarchy.

Have mmap(0, ...) respect the current p->p_limits[RLIMIT_DATA].rlim_max
value rather than the sysctl tweakable variable.  This allows mmap to
place mappings at sensible locations when limits have been reduced.

Have the imgact_elf.c ld-elf.so.1 placement algorithm use the same
method as mmap(0, ...) now does.

Note that we cannot remove all references to the sysctl tweakable
maxdsiz etc variables because /etc/login.conf specifies a datasize
of 'unlimited'.  And that causes exec etc to fail since it can no
longer find space to mmap things.
2003-09-25 01:10:26 +00:00
ps
db0d5cd641 Make MAXTSIZ, DFLDSIZ, MAXDSIZ, DFLSSIZ, MAXSSIZ, SGROWSIZ loader
tunable.

Reviewed by:	peter
MFC after:	2 weeks
2001-10-10 23:06:54 +00:00
obrien
f5e17318b3 Fix style of defines. 2001-06-09 05:21:17 +00:00
obrien
ff1c47a0de StrongARM platform-specific definitions. 2001-01-04 05:23:06 +00:00