musl/include/dlfcn.h, branch master

add time64 redirect for, and redirecting implementation of, dlsym

2019年11月02日T22:30:56+00:00

if symbols are being redirected to provide the new time64 ABI, dlsym
must perform matching redirections; otherwise, it would poke a hole in
the magic and return pointers to functions that are not safe to call
from a caller using time64 types.
rather than duplicating a table of redirections, use the time64
symbols present in libc's symbol table to derive the decision for
whether a particular symbol needs to be redirected.

const-qualify the address argument to dladdr

2014年01月07日T03:03:38+00:00

this agrees with implementation practice on glibc and BSD systems, and
is the const-correct way to do things; it eliminates warnings from
passing pointers to const. the prototype without const came from
seemingly erroneous man pages.

implement minimal dlinfo function

2013年06月29日T16:46:46+00:00

add RTLD_NODELETE flag for dlopen

2013年01月24日T03:18:45+00:00

this is a trivial no-op, because dlclose never deletes libraries. thus
we might as well have it in the header in case some application wants
it, since we're already providing it anyway.

add support for RTLD_NOLOAD to dlopen

2013年01月24日T03:07:45+00:00

based on patch by Pierre Carrier  that just added
the flag constant, but with minimal additional code so that it
actually works as documented. this is a nonstandard option but some
major software (reportedly, Firefox) uses it and it was easy to add
anyway.

default features: make musl usable without feature test macros

2012年09月08日T03:13:55+00:00

the old behavior of exposing nothing except plain ISO C can be
obtained by defining __STRICT_ANSI__ or using a compiler option (such
as -std=c99) that predefines it. the new default featureset is POSIX
with XSI plus _BSD_SOURCE. any explicit feature test macros will
inhibit the default.
installation docs have also been updated to reflect this change.

dladdr should be available under _BSD_SOURCE as well as _GNU_SOURCE

2012年09月07日T02:58:34+00:00

use restrict everywhere it's required by c99 and/or posix 2008

2012年09月07日T02:44:55+00:00

to deal with the fact that the public headers may be used with pre-c99
compilers, __restrict is used in place of restrict, and defined
appropriately for any supported compiler. we also avoid the form
[restrict] since older versions of gcc rejected it due to a bug in the
original c99 standard, and instead use the form *restrict.

dladdr support for dynamic linker (nonstandard extension)

2012年08月27日T01:09:26+00:00

based on patches submitted by boris brezillon. this commit also fixes
the issue whereby the main application and libc don't have the address
ranges of their mappings stored, which was theoretically a problem for
RTLD_NEXT support in dlsym; it didn't actually matter because libc
never calls dlsym, and it seemed to be doing the right thing (by
chance) for symbols in the main program as well.

further fixup dlfcn.h

2011年06月27日T05:02:28+00:00