Loads a custom ntdll.dll.so in wine for Bayonetta

ntdll_override.c

/* gcc -m32 -O2 -Wall -shared -fPIC -ldl -o ntdll_override.so ntdll_override.c */
#define _GNU_SOURCE
#include <dlfcn.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <stdlib.h>

typedef void* (*wine_dlopen_func_type)(const char *filename, int flag, char *error, size_t errorsize);

void *wine_dlopen(const char *filename, int flag, char *error, size_t errorsize)
{
	static const char* NTDLL = "ntdll.dll.so";
	static wine_dlopen_func_type wine_dlopen_func = NULL;
	if (!wine_dlopen_func)
		wine_dlopen_func = (wine_dlopen_func_type)dlsym(RTLD_NEXT, "wine_dlopen");
	static char ntdll_path_buf[PATH_MAX+1];
	static const char* ntdll_path = NULL;
	if (!ntdll_path && !access(NTDLL, R_OK))
		ntdll_path = realpath(NTDLL, ntdll_path_buf);
	if (ntdll_path) {
		const char *c;
		if ((c = strrchr(filename, '/')) && *c)
			++c;
		else
			c = filename;
		if (!strcmp(c, NTDLL))
			filename = ntdll_path;
	}
	return wine_dlopen_func(filename, flag, error, errorsize);
}