src/lib/libelf/_libelf.h, branch releng/8.4

MFC r210331-r210333,r210335,r210336,r210338,r210340,r210341,r210559.

2010-09-04T13:13:00Z

r210331: Add a new ELF type denoting GNU style hash tables. r210332: Changes for supporting GNU Hash sections. r210333: Note that the *_fsize() functions are only defined for ELF types that have a fixed size. r210335: - Return zero for file sizes of ELF types that have a variable size. - Neaten a few comments. r210336: Reduce verbosity. r210338: 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. r210340: - 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. r210341: Add support for translating sections of type ELF_T_GNUHASH. r210559: Protect GNUHASH translation functions with #ifdef; unbreak cross toolchain build.

MFC r210344,r210345,r210348.

2010-09-04T12:52:44Z

r210344: Avoid switching between "unsigned char" and "char" in the C code generated from "libelf_convert.m4". r210345: * 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()`. r210348: 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".

MFC r210329,r210330,r210347.

2010-09-04T12:40:06Z

r210329: Use to declare the prototype for ftruncate(). r210330: Allow an application that updates only the ELF Ehdr to work. r210347: Fix a memory leak.

Keep shadow copies of the `e_shnum', `e_phnum' and `e_shstrndx'

2006-12-25T02:22:22Z

members of the ELF Executable Header inside the library-private `struct _Elf' descriptor and only update the underlying Elf{32,64}_Ehdr structure on an elf_update(3) call. These fields of the Ehdr structure are technically `out of bounds' for an application program per the ELF(3) API, but we've seen applications that initialize a new Ehdr structure using memcpy(), messing up the library's invariants. [1] Implement elf_getphnum() and handle ELF objects with more than 64K program header table entries. Reported by: jb [1]

MFP4: Add an implementation of the ELF(3) and GELF(3) API set.

2006-11-11T17:16:35Z

Bump __FreeBSD_version. Reviewed by: jb