termux-packages/x11-packages/mesa/shm-hook.patch

diff -uNr mesa-17.3.9/src/gallium/winsys/sw/xlib/xlib_sw_winsys.c mesa-17.3.9.mod/src/gallium/winsys/sw/xlib/xlib_sw_winsys.c
--- mesa-17.3.9/src/gallium/winsys/sw/xlib/xlib_sw_winsys.c	2018-04-18 11:44:00.000000000 +0300
+++ mesa-17.3.9.mod/src/gallium/winsys/sw/xlib/xlib_sw_winsys.c	2020-01-04 23:30:19.874977603 +0200
@@ -46,9 +46,84 @@
 #include <X11/Xlibint.h>
 #include <X11/Xutil.h>
 #include <sys/ipc.h>
-#include <sys/shm.h>
 #include <X11/extensions/XShm.h>
 
+#include <linux/shm.h>
+#include <dlfcn.h>
+
+#ifndef shmid_ds
+# define shmid_ds shmid64_ds
+#endif
+
+static void * (*android_shmat)(int shmid, const void *shmaddr, int shmflg) = NULL;
+static int (*android_shmdt)(const void *shmaddr) = NULL;
+static int (*android_shmget)(key_t key, size_t size, int shmflg) = NULL;
+static int (*android_shmctl)(int shmid, int cmd, struct shmid_ds *buf) = NULL;
+
+static void * shmat(int shmid, const void *shmaddr, int shmflg) {
+	if (!android_shmat) {
+		void *handle = dlopen("@TERMUX_PREFIX@/lib/libandroid-shmem.so", RTLD_LOCAL | RTLD_LAZY);
+
+		if (!handle) {
+				abort();
+		}
+
+		android_shmat = dlsym(handle, "shmat");
+
+		dlclose(handle);
+	}
+
+	return android_shmat(shmid, shmaddr, shmflg);
+}
+
+static int shmdt(const void *shmaddr) {
+	if (!android_shmdt) {
+		void *handle = dlopen("@TERMUX_PREFIX@/lib/libandroid-shmem.so", RTLD_LOCAL | RTLD_LAZY);
+
+		if (!handle) {
+				abort();
+		}
+
+		android_shmdt = dlsym(handle, "shmdt");
+
+		dlclose(handle);
+	}
+
+	return android_shmdt(shmaddr);
+}
+
+static int shmget(key_t key, size_t size, int shmflg) {
+	if (!android_shmget) {
+		void *handle = dlopen("@TERMUX_PREFIX@/lib/libandroid-shmem.so", RTLD_LOCAL | RTLD_LAZY);
+
+		if (!handle) {
+				abort();
+		}
+
+		android_shmget = dlsym(handle, "shmget");
+
+		dlclose(handle);
+	}
+
+	return android_shmget(key, size, shmflg);
+}
+
+static int shmctl(int shmid, int cmd, struct shmid_ds *buf) {
+	if (!android_shmctl) {
+		void *handle = dlopen("@TERMUX_PREFIX@/lib/libandroid-shmem.so", RTLD_LOCAL | RTLD_LAZY);
+
+		if (!handle) {
+				abort();
+		}
+
+		android_shmctl = dlsym(handle, "shmctl");
+
+		dlclose(handle);
+	}
+
+	return android_shmctl(shmid, cmd, buf);
+}
+
 DEBUG_GET_ONCE_BOOL_OPTION(xlib_no_shm, "XLIB_NO_SHM", FALSE)
 
 /**
diff -uNr mesa-17.3.9/src/mesa/drivers/x11/glxheader.h mesa-17.3.9.mod/src/mesa/drivers/x11/glxheader.h
--- mesa-17.3.9/src/mesa/drivers/x11/glxheader.h	2018-04-18 11:44:00.000000000 +0300
+++ mesa-17.3.9.mod/src/mesa/drivers/x11/glxheader.h	2020-01-04 23:38:48.043159877 +0200
@@ -34,7 +34,6 @@
 # include <X11/Xutil.h>
 # ifdef USE_XSHM  /* was SHM */
 #  include <sys/ipc.h>
-#  include <sys/shm.h>
 #  include <X11/extensions/XShm.h>
 # endif
 # include <GL/glx.h>
diff -uNr mesa-17.3.9/src/mesa/drivers/x11/xm_buffer.c mesa-17.3.9.mod/src/mesa/drivers/x11/xm_buffer.c
--- mesa-17.3.9/src/mesa/drivers/x11/xm_buffer.c	2018-04-18 11:44:00.000000000 +0300
+++ mesa-17.3.9.mod/src/mesa/drivers/x11/xm_buffer.c	2020-01-04 23:29:44.585678356 +0200
@@ -37,11 +37,86 @@
 #include "main/renderbuffer.h"
 #include "swrast/s_renderbuffer.h"
 
-
 #define XMESA_RENDERBUFFER 0x1234
 
 
 #if defined(USE_XSHM) 
+#include <linux/shm.h>
+#include <dlfcn.h>
+
+#ifndef shmid_ds
+# define shmid_ds shmid64_ds
+#endif
+
+static void * (*android_shmat)(int shmid, const void *shmaddr, int shmflg) = NULL;
+static int (*android_shmdt)(const void *shmaddr) = NULL;
+static int (*android_shmget)(key_t key, size_t size, int shmflg) = NULL;
+static int (*android_shmctl)(int shmid, int cmd, struct shmid_ds *buf) = NULL;
+
+static void * shmat(int shmid, const void *shmaddr, int shmflg) {
+	if (!android_shmat) {
+		void *handle = dlopen("@TERMUX_PREFIX@/lib/libandroid-shmem.so", RTLD_LOCAL | RTLD_LAZY);
+
+		if (!handle) {
+				abort();
+		}
+
+		android_shmat = dlsym(handle, "shmat");
+
+		dlclose(handle);
+	}
+
+	return android_shmat(shmid, shmaddr, shmflg);
+}
+
+static int shmdt(const void *shmaddr) {
+	if (!android_shmdt) {
+		void *handle = dlopen("@TERMUX_PREFIX@/lib/libandroid-shmem.so", RTLD_LOCAL | RTLD_LAZY);
+
+		if (!handle) {
+				abort();
+		}
+
+		android_shmdt = dlsym(handle, "shmdt");
+
+		dlclose(handle);
+	}
+
+	return android_shmdt(shmaddr);
+}
+
+static int shmget(key_t key, size_t size, int shmflg) {
+	if (!android_shmget) {
+		void *handle = dlopen("@TERMUX_PREFIX@/lib/libandroid-shmem.so", RTLD_LOCAL | RTLD_LAZY);
+
+		if (!handle) {
+				abort();
+		}
+
+		android_shmget = dlsym(handle, "shmget");
+
+		dlclose(handle);
+	}
+
+	return android_shmget(key, size, shmflg);
+}
+
+static int shmctl(int shmid, int cmd, struct shmid_ds *buf) {
+	if (!android_shmctl) {
+		void *handle = dlopen("@TERMUX_PREFIX@/lib/libandroid-shmem.so", RTLD_LOCAL | RTLD_LAZY);
+
+		if (!handle) {
+				abort();
+		}
+
+		android_shmctl = dlsym(handle, "shmctl");
+
+		dlclose(handle);
+	}
+
+	return android_shmctl(shmid, cmd, buf);
+}
+
 static volatile int mesaXErrorFlag = 0;
 
 /**