svn commit: r358708 - head/contrib/elftoolchain/readelf

[Ed Maste]

Author: emaste
Date: Fri Mar  6 15:58:52 2020
New Revision: 358708
URL: https://svnweb.freebsd.org/changeset/base/358708

Log:
  readelf: decode and print Xen ELF note strings
  
  Sponsored by:	The FreeBSD Foundation

Modified:
  head/contrib/elftoolchain/readelf/readelf.c

Modified: head/contrib/elftoolchain/readelf/readelf.c
==============================================================================
--- head/contrib/elftoolchain/readelf/readelf.c	Fri Mar  6 15:57:21 2020	(r358707)
+++ head/contrib/elftoolchain/readelf/readelf.c	Fri Mar  6 15:58:52 2020	(r358708)
@@ -3677,6 +3677,33 @@ static struct flag_desc note_feature_ctl_flags[] = {
 };
 
 static void
+dump_note_string(const char *description, const char *s, size_t len)
+{
+	size_t i;
+	int printable = 1;
+
+	if (len == 0 || s[--len] != '\0') {
+		printable = 0;
+	} else {
+		for (i = 0; i < len; i++) {
+			if (!isprint(s[i])) {
+				printable = 0;
+				break;
+			}
+		}
+	}
+
+	if (printable) {
+		printf("   %s: %s\n", description, s);
+	} else {
+		printf("   description data:");
+		for (i = 0; i < len; i++)
+			printf(" %02x", (unsigned char)s[i]);
+		printf("\n");
+	}
+}
+
+static void
 dump_notes_data(struct readelf *re, const char *name, uint32_t type,
     const char *buf, size_t sz)
 {
@@ -3714,6 +3741,30 @@ dump_notes_data(struct readelf *re, const char *name, 
 		switch (type) {
 		case NT_GNU_PROPERTY_TYPE_0:
 			dump_gnu_property_type_0(re, buf, sz);
+			return;
+		}
+	} else if (strcmp(name, "Xen") == 0) {
+		switch (type) {
+		case 5:
+			dump_note_string("Xen version", buf, sz);
+			return;
+		case 6:
+			dump_note_string("Guest OS", buf, sz);
+			return;
+		case 7:
+			dump_note_string("Guest version", buf, sz);
+			return;
+		case 8:
+			dump_note_string("Loader", buf, sz);
+			return;
+		case 9:
+			dump_note_string("PAE mode", buf, sz);
+			return;
+		case 10:
+			dump_note_string("Features", buf, sz);
+			return;
+		case 11:
+			dump_note_string("BSD symtab", buf, sz);
 			return;
 		}
 	}