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[Bug libc/11767] New: RFE: dlopen of in-memory ET_DYN or ET_EXEC object
- From: "jreiser at BitWagon dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: 29 Jun 2010 18:02:14 -0000
- Subject: [Bug libc/11767] New: RFE: dlopen of in-memory ET_DYN or ET_EXEC object
- Reply-to: sourceware-bugzilla at sourceware dot org
Request For Enhancement (RFE): Please implement some way to add an ELF object
(ET_DYN or ET_EXEC) that already is in memory, into the set of modules that are
managed by the runtime loader rtld, instead of requiring dlopen() of a file from
the filesystem. This capability is useful for managing modules that are created
at runtime, and/or to help implement protection and access controls, etc.
Here is a suggestion of syntax and semantics: a new function
#include <link.h> /* macro-ize Elf32_Xxx vs. Elf64_Xxx */
void *handle = dlopen_phdr(ElfW(Phdr) const *phdr, int n_phdr, int flag);
which is much like dlopen() except that the mmap()s already have been done
before calling dlopen_phdr(). The "slide" value (adjustment in load address)
may be computed from the difference between the input phdr parameter and the
PT_PHDR.p_vaddr that is found in the vector of ElfW(Phdr)s.
--
Summary: RFE: dlopen of in-memory ET_DYN or ET_EXEC object
Product: glibc
Version: 2.12
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: drepper at redhat dot com
ReportedBy: jreiser at BitWagon dot com
CC: glibc-bugs at sources dot redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=11767
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