From 138d456785a35c02a9dd9370ca662fb9d5698e91 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Thu, 14 Jul 2022 14:51:45 +0200
Subject: [vmware16] ADD MISSING FILE

---
 core/modules/vmware16/usb-patcher.c | 57 +++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 core/modules/vmware16/usb-patcher.c

(limited to 'core/modules/vmware16')

diff --git a/core/modules/vmware16/usb-patcher.c b/core/modules/vmware16/usb-patcher.c
new file mode 100644
index 00000000..b9faaf71
--- /dev/null
+++ b/core/modules/vmware16/usb-patcher.c
@@ -0,0 +1,57 @@
+#define _GNU_SOURCE
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <errno.h>
+
+char* findSequence(char *buffer, size_t len, size_t offset);
+
+int main(int argc, char**argv)
+{
+	int fd;
+	ssize_t flen;
+	char *exe, *offset;
+	fd = open( argv[1], O_RDWR );
+	if ( fd == -1 ) {
+		perror( "Cannot open argv[1]" );
+		return 1;
+	}
+	flen = lseek( fd, 0, SEEK_END );
+	if ( flen < 0 ) {
+		perror( "File length bad" );
+		return 2;
+	}
+	flen &= ~( sysconf( _SC_PAGE_SIZE ) - 1 );
+	printf( "Mapping %d bytes.\n", (int)flen );
+	exe = mmap( NULL, flen, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 );
+	if ( exe == NULL ) {
+		perror( "mmap failed" );
+		return 3;
+	}
+	close( fd );
+	offset = findSequence( exe, flen, 0 );
+	if ( offset == NULL ) {
+		printf( "Sequence not found\n" );
+		return 4;
+	}
+	if ( findSequence( exe, flen, ( offset - exe ) + 19 ) != NULL ) {
+		printf( "Found more than one match\n" );
+		return 5;
+	}
+	printf( "Mapped at %p, instruction at %p\n", exe, offset );
+	offset[8] = '\xfd';
+	munmap( exe, flen );
+	printf( "File patched.\n" );
+	return 0;
+}
+
+
+char* findSequence(char *buffer, size_t len, size_t offset)
+{
+	return memmem( buffer + offset, len - offset,
+			"\x41\x56\x41\x55\x41\x54\x41\x89\xf5\x55\x53\x48\x89\xfd\xbf\x0d\x00\x00\x00", 19 );
+}
-- 
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