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

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]

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/libelf/Version.map b/lib/libelf/Version.map
index e8cc819..2c8e81d 100644
--- a/lib/libelf/Version.map
+++ b/lib/libelf/Version.map
@@ -39,6 +39,7 @@ global:
 	elf_getdata;
 	elf_getident;
 	elf_getscn;
+	elf_getphnum;
 	elf_getshnum;
 	elf_getshstrndx;
 	elf_hash;