Attachment 143165 Details for Bug 107990 – LD_PRELOAD shim

LD_PRELOAD shim

dyinglight-shim.c (text/x-csrc), 1.32 KB, created by John Brooks on 2019-01-19 19:29:34 UTC

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Creator: John Brooks

Created: 2019-01-19 19:29:34 UTC

Size: 1.32 KB

patch

obsolete

>/*
> * LD_PRELOAD shim which makes GetProcAddress return NULL for
> * glMapNamedBufferRangeEXT, which allows Dying Light to work on Mesa when Mesa
> * is compiled with GLVND enabled.
> *
> * Build with: gcc -s -O2 -shared -fPIC -o dyinglight-shim.{so,c} -ldl
> *
> * Use by running the game with LD_PRELOAD=/path/to/dyinglight-shim.so
> * On Steam this would look like: LD_PRELOAD=/path/to/dyinglight-shim.so %command%
> *
> * Adapted from Thomas J. Moore's LD_PRELOAD shim for Divinity: Original Sin:
> * https://bugs.freedesktop.org/show_bug.cgi?id=93551#c32
> */
>
>/* for RTLD_NEXT */
>#ifndef _GNU_SOURCE
>#define _GNU_SOURCE
>#endif
>#include <dlfcn.h>
>#include <GL/gl.h>
>#include <string.h>
>
>#define _GLX_PUBLIC
>
>_GLX_PUBLIC void (*glXGetProcAddressARB(const GLubyte * procName)) (void) {
>	static void* next = NULL;
>	if (strcmp((const char *) procName, "glMapNamedBufferRangeEXT") == 0)
>		return NULL;
>	if (!next)
>		next = dlsym(RTLD_NEXT, "glXGetProcAddressARB");
>	return ((_GLX_PUBLIC void (*(*)(const GLubyte *))(void))next)(procName);
>}
>
>_GLX_PUBLIC void (*glXGetProcAddress(const GLubyte * procName)) (void) {
>	static void* next = NULL;
>	if (strcmp((const char *) procName, "glMapNamedBufferRangeEXT") == 0)
>		return NULL;
>	if (!next)
>		next = dlsym(RTLD_NEXT, "glXGetProcAddress");
>	return ((_GLX_PUBLIC void (*(*)(const GLubyte *))(void))next)(procName);
>}

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