reactos/posix/lib/psxdll/dlfcn/dlsym.c

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/* $Id: dlsym.c,v 1.2 2002/02/20 09:17:56 hyperion Exp $
*/
/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS POSIX+ Subsystem
* FILE: subsys/psx/lib/psxdll/dlfcn/dlsym.c
* PURPOSE: Obtain the address of a symbol from a dlopen() object
* PROGRAMMER: KJK::Hyperion <noog@libero.it>
* UPDATE HISTORY:
* 19/12/2001: Created
*/
#include <ddk/ntddk.h>
#include <ntdll/rtl.h>
#include <ntdll/ldr.h>
#include <dlfcn.h>
#include <psx/dlfcn.h>
#include <psx/errno.h>
#include <psx/debug.h>
void *__dlsymn(void *, unsigned long int);
void *__dlsym(void *, int, const char *, unsigned long int);
void *dlsym(void *handle, const char *name)
{
return (__dlsym(handle, 1, name, 0));
}
void *__dlsymn(void *handle, unsigned long int ordinal)
{
return (__dlsym(handle, 0, 0, ordinal));
}
void *__dlsym(void *handle, int by_name, const char *name, unsigned long int ordinal)
{
struct __dlobj * pdloObject;
void * pProcAddr;
NTSTATUS nErrCode;
if(handle == RTLD_NEXT)
{
FIXME("implement RTLD_NEXT semantics");
return (NULL);
}
pdloObject = (struct __dlobj *) handle;
if(pdloObject->global)
{
FIXME("implement global symbol matching");
return (NULL);
}
if(by_name)
{
ANSI_STRING strName;
RtlInitAnsiString(&strName, (LPSTR)name);
nErrCode = LdrGetProcedureAddress
(
pdloObject->handle,
&strName,
0,
(PVOID *)&pProcAddr
);
}
else
{
nErrCode = LdrGetProcedureAddress
(
pdloObject->handle,
NULL,
ordinal,
(PVOID *)&pProcAddr
);
}
if(!NT_SUCCESS(nErrCode))
{
__dl_set_last_error(__status_to_errno(nErrCode));
return (NULL);
}
return pProcAddr;
}
/* EOF */