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musl/include/dlfcn.h

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initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
#ifndef _DLFCN_H
#define _DLFCN_H
further fixup dlfcn.h
2011-06-27 05:02:28 +00:00
#ifdef __cplusplus
extern "C" {
#endif
default features: make musl usable without feature test macros 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.
2012-09-08 03:13:55 +00:00
#include <features.h>
use restrict everywhere it's required by c99 and/or posix 2008 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.
2012-09-07 02:44:55 +00:00
match LSB/glibc constants for dynamic loader
2011-06-27 05:01:19 +00:00
#define RTLD_LAZY 1
#define RTLD_NOW 2
add support for RTLD_NOLOAD to dlopen based on patch by Pierre Carrier <pierre@gcarrier.fr> 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.
2013-01-24 03:07:45 +00:00
#define RTLD_NOLOAD 4
add RTLD_NODELETE flag for dlopen 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.
2013-01-24 03:18:45 +00:00
#define RTLD_NODELETE 4096
match LSB/glibc constants for dynamic loader
2011-06-27 05:01:19 +00:00
#define RTLD_GLOBAL 256
#define RTLD_LOCAL 0
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
further fixup dlfcn.h
2011-06-27 05:02:28 +00:00
#define RTLD_NEXT ((void *)-1)
#define RTLD_DEFAULT ((void *)0)
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
implement minimal dlinfo function
2013-06-29 16:46:46 +00:00
#define RTLD_DI_LINKMAP 2
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
int dlclose(void *);
char *dlerror(void);
void *dlopen(const char *, int);
use restrict everywhere it's required by c99 and/or posix 2008 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.
2012-09-07 02:44:55 +00:00
void *dlsym(void *__restrict, const char *__restrict);
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
dladdr should be available under _BSD_SOURCE as well as _GNU_SOURCE
2012-09-07 02:58:34 +00:00
#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
dladdr support for dynamic linker (nonstandard extension) 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.
2012-08-27 01:09:26 +00:00
typedef struct {
const char *dli_fname;
void *dli_fbase;
const char *dli_sname;
void *dli_saddr;
} Dl_info;
const-qualify the address argument to dladdr 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.
2014-01-07 03:03:38 +00:00
int dladdr(const void *, Dl_info *);
implement minimal dlinfo function
2013-06-29 16:46:46 +00:00
int dlinfo(void *, int, void *);
dladdr support for dynamic linker (nonstandard extension) 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.
2012-08-27 01:09:26 +00:00
#endif
further fixup dlfcn.h
2011-06-27 05:02:28 +00:00
#ifdef __cplusplus
}
#endif
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
#endif