1 files changed, 99 insertions, 0 deletions
diff --git a/sideband/src/pt_sb_file.c b/sideband/src/pt_sb_file.c
new file mode 100644
index 0000000000000..0849111a9f3d7
--- /dev/null
+++ b/sideband/src/pt_sb_file.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2017-2019, Intel Corporation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *  * Neither the name of Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "pt_sb_file.h"
+
+#include <stdint.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "intel-pt.h"
+
+
+int pt_sb_file_load(void **pbuffer, size_t *psize, const char *filename,
+		    size_t begin, size_t end)
+{
+	size_t size;
+	FILE *file;
+	void *content;
+	long fsize, fbegin, fend;
+	int errcode;
+
+	if (!pbuffer || !psize || !filename)
+		return -pte_invalid;
+
+	if (end && end <= begin)
+		return -pte_invalid;
+
+	if (LONG_MAX < begin || LONG_MAX < end)
+		return -pte_invalid;
+
+	file = fopen(filename, "rb");
+	if (!file)
+		return -pte_bad_file;
+
+	errcode = fseek(file, 0, SEEK_END);
+	if (errcode)
+		goto out_file;
+
+	fsize = ftell(file);
+	if (fsize < 0)
+		goto out_file;
+
+	fbegin = (long) begin;
+	if (!end)
+		fend = fsize;
+	else {
+		fend = (long) end;
+		if (fsize < fend)
+			fend = fsize;
+	}
+
+	size = (size_t) (fend - fbegin);
+
+	errcode = fseek(file, fbegin, SEEK_SET);
+	if (errcode)
+		goto out_file;
+
+	content = malloc(size);
+	if (!content) {
+		fclose(file);
+		return -pte_nomem;
+	}
+
+	*psize = fread(content, 1, size, file);
+	*pbuffer = content;
+
+	fclose(file);
+	return 0;
+
+out_file:
+	fclose(file);
+	return -pte_bad_file;
+}