Commit Graph

75 Commits

Author SHA1 Message Date
Rui Paulo
029a737371 Don't link drti.o with libelf_pic.a. This means that all software with
userland SDT probes must be linked with libelf explicitly.

Requested by:	kib
Sponsored by:	The FreeBSD Foundation
2010-08-21 17:29:59 +00:00
Rui Paulo
9329096b80 Install a PIC libelf. This will be needed by the DTrace runtime
instrumentation object (dtri.o).

Sponsored by:	The FreeBSD Foundation
2010-08-21 10:40:12 +00:00
Joel Dahl
c2025a7660 Fix typos, spelling, formatting and mdoc mistakes found by Nobuyuki while
translating these manual pages.  Minor corrections by me.

Submitted by:	Nobuyuki Koganemaru <n-kogane@syd.odn.ne.jp>
2010-08-16 15:18:30 +00:00
Kai Wang
f4717fa913 Add translation support for section type SHT_SUNW_dof.
Submitted by:	rpaulo
MFC after:	2 weeks
2010-08-11 19:59:31 +00:00
Joel Dahl
799162a628 Spelling fixes. 2010-08-03 17:40:09 +00:00
Kai Wang
41bc155d1f Protect GNUHASH translation functions with #ifdef; unbreak cross
toolchain build.

Reported by:	jchandra
MFC after:	1 month
2010-07-28 11:01:07 +00:00
Kai Wang
85de6c411e * Remove a superfluous error description.
* Document an additional error that may be returned: `ELF_E_ARCHIVE`.

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 13:29:00 +00:00
Kai Wang
0806107365 Add a cross-reference to elf_rawfile(3).
Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 13:23:07 +00:00
Kai Wang
52d63629e6 * Note that ar(1) archives may also be opened using elf_memory(3).
* Ignore the passed in value of the `fd` argument for ar(1) archives
  opened with elf_memory(3).

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 13:18:57 +00:00
Kai Wang
d284162491 Remove a redundant word.
Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 13:00:01 +00:00
Kai Wang
d961c5b461 Move helper functions _libelf_ar_get_{name,number,string}() and
`_libelf_ar_open()` to a new compilation unit "libelf_ar_util.c"
to break the circular dependency between "elf_memory.o" and
"libelf_ar.o".

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 12:54:34 +00:00
Kai Wang
e2efa43644 Fix a memory leak.
Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 12:30:58 +00:00
Kai Wang
86f5401b91 * Deprecate elf_getshnum(), elf_getphnum() and elf_getshstrndx() in
favour of `elf_getshdrnum()`, `elf_getphdrnum()` and `elf_getshdrstrndx()`
  respectively.
* Add new manual pages for `elf_getshdrstrndx()`, `elf_getphdrnum()` and
  `elf_getshdrnum()`.
* Add a deprecation warning for `elf_getshstrndx()`, `elf_getphnum()` and
  `elf_getshnum()`.

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 12:14:50 +00:00
Kai Wang
9eab8b61d9 Avoid switching between "unsigned char" and "char" in the C code
generated from "libelf_convert.m4".

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 11:26:18 +00:00
Kai Wang
1d69e83ddd Add support for translating sections of type ELF_T_GNUHASH.
Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 10:57:22 +00:00
Kai Wang
fff07a4233 - Document that the *fsize() functions return a size of 1 for Elf
types that don't have a fixed size.
- The *fsize() functions should return a size of 1, for variable length
  types.
- Redefine symbol ELF_T_LAST to match the current end of the list.

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 10:39:29 +00:00
Kai Wang
f0f10541db Perform additional checks when translating between file and memory
representations of ELF types.

The ELF(3) API allows applications to request a conversion that is
`in-place', i.e., with source and destinations data buffers being
the same.  However, the file and memory sizes of ELF sections that
have additional internal structure, such as those of type `Elf_Note',
or `Elf_GNU_Hash_Header', can be determined only known after the
type-specific headers that comprise the first few words in these
sections are read and translated.

Pass in the size of destination buffer to type translation routines
in "libelf_convert.m4" and have these routines return an error code
if the translated data would not fit inside the destination buffer.

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 10:25:02 +00:00
Kai Wang
5d261af96d Reduce verbosity.
Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 10:11:46 +00:00
Kai Wang
a2cf6dae18 - Return zero for file sizes of ELF types that have a variable size.
- Neaten a few comments.

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 10:08:25 +00:00
Kai Wang
135fdd3027 Note that the *_fsize() functions are only defined for ELF types that
have a fixed size.

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 10:02:59 +00:00
Kai Wang
0e3c61d436 Changes for supporting GNU Hash sections.
Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 09:56:42 +00:00
Kai Wang
894afa87d6 Add a new ELF type denoting GNU style hash tables.
Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 09:51:24 +00:00
Kai Wang
7384c87800 Allow an application that updates only the ELF Ehdr to work.
Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 09:47:14 +00:00
Kai Wang
f44d4dafb4 Use <unistd.h> to declare the prototype for ftruncate().
Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 09:33:45 +00:00
Kai Wang
c0308c2c84 Bug fix: permit the creation of zero-sized sections.
Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 09:27:16 +00:00
Kai Wang
3fd7b10a01 Improve compatibility with other implementations of the ELF(3) API:
when an output file has no program headers, set the 'e_phentsize'
field of the ELF executable header to zero.

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 09:20:40 +00:00
Kai Wang
e8968eb491 Bug fix: when updating headers using the gelf_update_*() functions,
the appropriate `dirty' bit needs to be set for both the Elf32 and
Elf64 case.

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 08:58:52 +00:00
Kai Wang
7ee5b008fb - Correctly handle sections of type SHT_NOBITS. For these sections:
- elf_getdata() and elf_rawdata() should return an "Elf_Data" structure
    that has its "d_buf" member set to NULL and "d_size" member set to
    the nominal 'size' of the section.  [1]
  - Update the manual page for these functions.
- Fix a memory leak in an error handling path inside elf_getdata().
- Use _libelf_allocate_data() in elf_newdata() for consistency.

Obtained from:	elftoolchain
MFC after:		1 month
2010-07-21 08:54:46 +00:00
Kai Wang
c0aaca95a7 Remove a superfluous comment.
Obtained from:	     elftoolchain
MFC after:	     1 month
2010-07-21 08:43:48 +00:00
Kai Wang
b2c6fcf986 * Improve compatibility with existing application code by permitting the
use of `elf_getbase()` on non-archive members. This change is needed
  for gcc LTO (-flto) to work properly.
* Style fix: paranthesize returned values.
* Document the current behaviour of `elf_getbase()`.

Tested by:	gerald, Steve Kargl (original patch)
Obtained from:	elftoolchain
MFC after:	3 days
2010-06-13 10:58:50 +00:00
Ulrich Spörlein
2a10d6d199 mdoc: fix parenthesis
Reviewed by:	brueffer
2010-05-11 23:08:31 +00:00
Ulrich Spörlein
aa12cea2cc mdoc: order prologue macros consistently by Dd/Dt/Os
Although groff_mdoc(7) gives another impression, this is the ordering
most widely used and also required by mdocml/mandoc.

Reviewed by:	ru
Approved by:	philip, ed (mentors)
2010-04-14 19:08:06 +00:00
Christian Brueffer
0ae739d6b2 Remove useless .TE groff macro.
Submitted by:	Joerg Sonnenberger
MFC after:	3 days
2010-01-12 17:38:23 +00:00
Ed Schouten
daaf575910 Build lib/ with WARNS=6 by default.
Similar to libexec/, do the same with lib/. Make WARNS=6 the norm and
lower it when needed.

I'm setting WARNS?=0 for secure/. It seems secure/ includes the
Makefile.inc provided by lib/. I'm not going to touch that directory.
Most of the code there is contributed anyway.
2010-01-02 09:58:07 +00:00
David E. O'Brien
449c70725e Don't need to set symbol, default value is OK. 2009-03-12 04:44:09 +00:00
Joseph Koshy
175efc49f4 Add a README. 2009-01-05 05:14:26 +00:00
John Birrell
9445f413ee Relax the strict type check because gcc as distributed doesn't create
debug strtabs with type SHT_STRTAB. Although we could change FreeBSD's
gcc, we really need to play nicely with gcc as distributed by the FSF.
2008-05-23 07:35:36 +00:00
John Birrell
7d15d0a9c6 Change the alignment of the NOTE to match what gcc does. 2008-05-23 07:33:45 +00:00
John Birrell
c4607eb7ad Add the case for SHT_AMD64_UNWIND. 2008-05-23 07:32:19 +00:00
Christian Brueffer
662cac9f23 Fix some "in in" typos in comments.
PR:		121490
Submitted by:	Anatoly Borodin <anatoly.borodin@gmail.com>
Approved by:	rwatson (mentor), jkoshy
MFC after:	3 days
2008-03-26 07:32:08 +00:00
Joseph Koshy
b23372cd8e Ensure that the section header table is written out in an order
consistent with the section indices returned to the application by
elf_ndxscn().

Submitted by:		kaiw
2008-03-19 06:06:34 +00:00
Joseph Koshy
df7d1e2023 Clarify that the ELF library only sets the sh_entsize field of a
section header entry if the application is not taking charge of ELF
object layout.

Update (c) years, and bump the manual page's date.

Submitted by:		kaiw
2008-03-19 05:07:49 +00:00
Joseph Koshy
2a100d2353 - Fix an off-by-one bug in _libelf_insert_section(). [1]
- Update (c) years.

Submitted by:		kaiw [1]
2008-03-03 04:29:25 +00:00
Joseph Koshy
48f9a2656a Translate the r_info field of ELF relocation records when converting
between 64 and 32 bit variants.

Submitted by:		kaiw
2008-03-02 06:33:10 +00:00
Joseph Koshy
e77357ea2d Document the return type for gelf_fsize(3).
Submitted by:		kaiw
2008-02-04 18:50:28 +00:00
Joseph Koshy
742fe6de5d - Allow source descriptors with no data to be used as arguments to the
elf{32,64}_xlateto[fm]() translation functions.  This change makes our
  libelf compatible with other ELF(3) implementations. [1]
- Update manual page to reflect this change.
- Style fixes: wrap a long line.

Submitted by:	jb [1]
2007-11-26 03:09:33 +00:00
Joseph Koshy
1eb6c69045 Sections of type SHT_GNU_versym use ELF type ELF_T_HALF. Update manual
page and code to match.

Submitted by:	jb
MFC After: 	1 day
2007-11-23 11:29:36 +00:00
Joseph Koshy
a3347b3e74 Consistently use the word 'flag' to refer to ELF_F_* constants.
MFC after:	1 day
2007-10-22 03:38:43 +00:00
Joseph Koshy
cb32f86c1d Remove references to the 'e_phnum' field of the ELF header. Instead,
point the reader to the elf_getphnum() function.

MFC after:	1 day
2007-10-21 05:15:07 +00:00
Joseph Koshy
a649990050 Refer the reader to the elf_update(3) manual page for more information
on application control of ELF object layout.

MFC after:	1 day
2007-10-21 05:08:40 +00:00