Commit Graph

1972 Commits

Author SHA1 Message Date
Carlos O'Donell
141af660d8 Add comments to vDSO hwcap loading process.
Loading of the vDSO pseudo-hwcap from the type 2 GNU note is
a rather arcane and poorly documented process. Given that I had
a chance to review this code today I thought I would add all
of the things I had to lookup to verify the validity of the
process.

With a single .note.GNU the vDSO can register up to 64 flags,
though in practice you are limited to 64 - _DL_FIRST_EXTRA
bits which on x86 is 12 bits.

The only use of this that I know of is in the Xen support
in Linux where they use the 1st bit to indicate "nosegneg".
I see "We use bit 1 to avoid bugs in some versions of glibc
when bit 0 is used; the choice is otherwise arbitrary.", but
no reference to a glibc bug anywhere. The code as-is should
support bit zero, so we still have that free for future use.

The kernel, glibc, and ld.so.cache must coordinate to ensure
that bit values don't go too high and are used consistently.

---

2013-05-13  Carlos O'Donell  <carlos@redhat.com>

	* elf/dl-hwcaps.c (_dl_important_hwcaps): Comment vDSO hwcap loading.
	* elf/ldconfig.c (is_hwcap_platform): Comment each hwcap check.
	(main): Comment "tls" pseudo-hwcap.
2013-05-14 00:06:35 -04:00
Florian Weimer
4c0fe6fe42 Use *stat64 instead of *stat in installed programs
This ensures reliable operation on file systems with inode numbers
which do not fit into 32 bits.
2013-05-10 11:42:17 +02:00
Carlos O'Donell
3612972234 Add more comments to dlclose() algorithm.
The algorithm for scanning dependencies upon dlclose is
less than immediately obvious. This patch adds two bits
of comments that explain why you start the dependency
search at l_initfini[1], and why you need to restart
the search.

---

2013-05-09  Carlos O'Donell  <carlos@redhat.com>

	* elf/dl-close.c (_dl_close_worker): Add comments.
2013-05-09 17:37:15 -04:00
Roland McGrath
976e2f0381 Remove a dead declaration. 2013-05-06 17:06:50 -07:00
Roland McGrath
d5e8275481 Split _dl_writev out from _dl_debug_vdprintf. 2013-05-06 11:30:41 -07:00
Roland McGrath
60bfd54cbb Fix NEED_DL_SYSINFO{,_DSO} conditionalization in _dl_sysdep_start. 2013-05-03 15:09:48 -07:00
Joseph Myers
73709b2611 Move x86_64-specific audit tests to sysdeps/x86_64/. 2013-04-25 19:23:11 +00:00
David Holsgrove
9fbf9acabe Adding MicroBlaze support to elf/elf.h
Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
2013-04-16 09:48:08 +10:00
Andreas Schwab
273cdee86d Fix invalid free of memory allocated during rtld init 2013-04-11 09:22:05 +02:00
Carlos O'Donell
7208a313b9 dl_open_worker: Memset all of seen array.
The seen array was doubled in size recently, but the memset to clear
the array was not adjusted. We adjust the memset to always be correct
regardless of the size of seen.

---

2013-04-06  Carlos O'Donell  <carlos@redhat.com>

	[BZ #15309]
	* elf/dl-open.c (dl_open_worker): memset all of seen array.
2013-04-06 17:00:02 -04:00
Roland McGrath
dc0a026385 Make _dl_phdr pointer to const. 2013-03-28 15:39:32 -07:00
Roland McGrath
3d3436ae68 Consolidate declarations of _dl_phdr, _dl_phnum. 2013-03-28 15:33:57 -07:00
Andreas Schwab
aaa8cb4b43 Add support for rtld directory different from slib directory 2013-03-19 12:07:26 +01:00
Roland McGrath
aefc9b8c7c Clean up _dl_pagesize initialization. 2013-03-15 14:35:17 -07:00
Roland McGrath
7775448e57 Fix NEED_DL_SYSINFO_DSO conditionals. 2013-03-01 14:44:44 -08:00
Petr Machata
08cbd996d3 Add ARM relocation constants to elf/elf.h. 2013-02-20 16:19:04 +00:00
Mike Frysinger
6ff444c418 unify xmalloc prototypes & friends
These prototypes are duplicated in many places.  Add a dedicated
header for holding prototypes for program-specific functions to
avoid that.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-02-18 17:16:05 -05:00
Siddhesh Poyarekar
be179c8a36 New function _dl_find_dso_for_object
Consolidate code to search for an address within a DSO.
2013-02-18 18:00:17 +05:30
Andreas Jaeger
f238fd190b Sort Versions files 2013-02-17 16:34:04 +01:00
Joseph Myers
2bdd4ca6b6 Remove miscellaneous bounded-pointers relics in C code. 2013-02-15 00:51:53 +00:00
Joseph Myers
e97ed6ddbe Remove bp-sym.h and BP_SYM uses from C code. 2013-02-14 13:12:02 +00:00
Joseph Myers
70d9946a44 Remove __ptrvalue, __bounded and __unbounded. 2013-02-13 23:30:40 +00:00
Carlos O'Donell
b2d3c3befb Add more comments to _dl_load_cache_lookup().
Calling _dl_load_cache_lookup will load the cache if not already.
If loading the cache fails no more attempts will be made to load
the cache.
2013-02-08 12:55:34 -05:00
Carlos O'Donell
b39949d211 ARM: Support loading unmarked objects from cache.
ARM now supports loading unmarked objects from
the dynamic loader cache. Unmarked objects can
be used with the hard-float or soft-float ABI.
We must support loading unmarked objects during
the transition period from a binutils that does
not mark objects to one that does mark them with
the correct ELF flags.

Signed-off-by: Carlos O'Donell <carlos@redhat.com>
2013-02-08 12:26:12 -05:00
Roland McGrath
f1d70dad53 Remove lots of inline keywords. 2013-02-07 14:44:18 -08:00
Roland McGrath
573c29b288 Replace an alloca use with a variable-length array. 2013-02-05 12:15:56 -08:00
Andreas Schwab
903ae060db Don't use GLIBC_PRIVATE errno outside of libraries 2013-02-04 10:01:54 +01:00
Jan Kratochvil
542f94662e Improve link_map.l_addr comment. 2013-02-02 10:29:17 +01:00
Adam Conrad
5655a0b58e Build elf/tst-array2 and elf/tst-array5 with --no-as-needed
* elf/Makefile (LDFLAGS-tst-array2): Add $(no-as-needed).
	(LDFLAGS-tst-array5): Likewise.
2013-01-22 23:05:33 -07:00
H.J. Lu
22676eafed Implement x86 SIZE32/SIZE64 relocations 2013-01-16 20:31:03 -08:00
Steve Ellcey
0e8529e94f 2013-01-11 Steve Ellcey <sellcey@mips.com>
* elf/elf.h (EF_MIPS_ARCH_32): Fix value.
	(EF_MIPS_ARCH_64): Fix value.
	(EF_MIPS_ARCH_32R2): New.
	(EF_MIPS_ARCH_64R2): New.
2013-01-11 11:20:05 -08:00
H.J. Lu
740b3dbee8 Add --enable-hardcoded-path-in-tests configure option 2013-01-11 07:14:18 -08:00
Roland McGrath
e7f68ef4bc Fix whitespace in elf.h MIPS macros. 2013-01-10 14:55:27 -08:00
Joseph Myers
828beb132d Use __extension__ with long long in installed headers. 2013-01-10 20:19:45 +00:00
Joseph Myers
568035b787 Update copyright notices with scripts/update-copyrights. 2013-01-02 19:05:09 +00:00
Joseph Myers
f4cf5f2d8b Add script to update copyright notices and reformat some to facilitate its use. 2013-01-01 16:29:10 +00:00
David S. Miller
0549fbba96 Update copyright years.
* catgets/gencat.c: Update copyright year.
	* csu/version.c: Likewise.
	* debug/catchsegv.sh: Likewise.
	* debug/pcprofiledump.c: Likewise.
	* debug/xtrace.sh: Likewise.
	* elf/ldconfig.c: Likewise.
	* elf/ldd.bash.in: Likewise.
	* elf/pldd.c: Likewise.
	* elf/sotruss.ksh: Likewise.
	* elf/sprof.c: Likewise.
	* iconv/iconv_prog.c: Likewise.
	* iconv/iconvconfig.c: Likewise.
	* locale/programs/locale.c: Likewise.
	* locale/programs/localedef.c: Likewise.
	* login/programs/pt_chown.c: Likewise.
	* malloc/memusage.sh: Likewise.
	* malloc/memusagestat.c: Likewise.
	* malloc/mtrace.pl: Likewise.
	* nscd/nscd.c: Likewise.
	* nss/getent.c: Likewise.
	* nss/makedb.c: Likewise.
	* posix/getconf.c: Likewise.
2013-01-01 00:11:43 -08:00
Andreas Jaeger
af5843efa0 Add values from Linux 3.7 to <elf.h> 2012-12-28 13:06:01 +01:00
Carlos O'Donell
c93ec1f091 Warn about unsupported DT_FLAGS_1 flags.
The dynamic loader will now warn about unsupported DT_FLAGS_1
flags when run with LD_DEBUG=files or LD_DEBUG=all.
2012-11-29 18:12:23 -08:00
H.J. Lu
c515fb5148 Cast to __intptr_t before casting pointer to int64 2012-11-26 16:45:36 -08:00
Andreas Schwab
d260b3b403 sotruss: fix argument parsing 2012-11-26 20:58:27 +01:00
Mike Frysinger
800938a126 use $(READELF) rather than readelf
We setup $(READELF) and use it everywhere, so fix the two places
that were using readelf directly.

Reported-by: Denis M. <god@politeia.in>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2012-11-23 15:23:18 -05:00
H.J. Lu
7e1be74125 Check supported DF_1_XXX bits 2012-11-21 06:33:19 -08:00
Steve McIntyre
1f51ee9246 Add ldconfig cache tag handling for AArch64
* sysdeps/generic/ldconfig.h (FLAG_AARCH64_LIB64): New macro.
	* elf/cache.c (print_entry): Print ",AArch64" for
	FLAG_AARCH64_LIB64.

Signed-off-by: Steve McIntyre <steve.mcintyre@linaro.org>
Reviewed-by: Carlos O'Donell <carlos@systemhalted.org>
2012-11-19 01:22:33 -05:00
Steve McIntyre
6665d4a25d Add ldconfig cache tag handling for ARM hard-float ABI
* sysdeps/generic/ldconfig.h (FLAG_ARM_LIBHF): New macro.
	* elf/cache.c (print_entry): Print ",hard-float" for
	FLAG_ARM_LIBHF.

Signed-off-by: Steve McIntyre <steve.mcintyre@linaro.org>
Reviewed-by: Carlos O'Donell <carlos@systemhalted.org>
2012-11-19 01:12:53 -05:00
Joseph Myers
150dc1a05a Remove ELF_MACHINE_NO_PLT conditionals. 2012-11-17 01:51:20 +00:00
H.J. Lu
bcbf9830b7 Set constructor/destructor priority to 1000 2012-11-16 07:40:38 -08:00
H.J. Lu
2e64d2659d Skip audit if l_reloc_result is NULL 2012-11-14 15:44:40 -08:00
Joseph Myers
8b748aed2a Support --with-pkgversion and --with-bugurl. 2012-11-09 22:13:45 +00:00
Marcus Shawcroft
57241e26e5 Adjust comment above AArch64 relocs. 2012-11-08 08:19:30 +00:00