From: "Y.D." <qcloud1014@gmail.com>
To: libc-help@sourceware.org
Subject: Add a new function to dlfcn.h?
Date: Sun, 16 Aug 2020 20:52:00 +0800 [thread overview]
Message-ID: <CAF6YOcM5NJmrjDvcaps7d6g8QkbBzL0jPK3Nsb6TeTu0LP8FdQ@mail.gmail.com> (raw)
Hi all,
I'm trying to add a new function to glibc-2.32, and I'm working on getting
the memory size allocated to a shared object.
To achieve this, I want to use the private fields(l_map_start and
l_map_end) in struct link_map, which is said to be internal to dynamic
linker, so I want to add a function to dlfcn.h, just like dlopen() and
dlclose().
The question is, when I want to imitate the way dlopen works, I find that
the dlopen first calls functions in dlfcn/dlopen.c, and then functions in
elf/dl-open.c, which makes me very confused.
If I want to add a new function in dlfcn.h, what should I do? Do I have to
write a new file under dlfcn/ called dlusage.c, and another called
dl-usage.c under elf/? If this is the case, how should I modify the
Makefile in both directories?
Or can I just append one function in a few existing c files and headers?
Any help will be highly appreciated.
Best,
Fengkai
next reply other threads:[~2020-08-16 12:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-16 12:52 Y.D. [this message]
2020-08-16 12:59 ` Florian Weimer
2020-08-17 2:15 ` Y.D.
2020-08-25 12:46 ` Florian Weimer
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