Initial public snapshot

With code from Bill. Thanks Bill!

1 files changed, 49 insertions, 0 deletions

diff --git a/src/dbg.c b/src/dbg.c
new file mode 100644
index 0000000..ca4e08e
--- /dev/null
+++ b/src/dbg.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright © 2021 Michael Smith <mikesmiffy128@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "con_.h"
+#include "intdefs.h"
+#include "ppmagic.h"
+#include "udis86.h"
+
+void dbg_hexdump(char *name, const void *p, int len) {
+	struct con_colour nice_colour = {160, 64, 200, 255}; // a nice purple colour
+	con_colourmsg(&nice_colour, "Hex dump \"%s\" (%p):", name, p);
+	for (const uchar *cp = p; cp - (uchar *)p < len; ++cp) {
+		// group into words and wrap every 8 words
+		switch ((cp - (uchar *)p) & 31) {
+			case 0: con_msg("\n"); break;
+			CASES(4, 8, 12, 16, 20, 24, 28): con_msg(" ");
+		}
+		con_colourmsg(&nice_colour, "%02X ", *cp);
+	}
+	con_msg("\n");
+}
+
+void dbg_asmdump(char *name, const void *p, int len) {
+	struct con_colour nice_colour = {40, 160, 140, 255}; // a nice teal colour
+	struct ud udis;
+	ud_init(&udis);
+	ud_set_mode(&udis, 32);
+	ud_set_input_buffer(&udis, p, len);
+	ud_set_syntax(&udis, UD_SYN_INTEL);
+	con_colourmsg(&nice_colour, "Disassembly \"%s\" (%p)\n", name, p);
+	while (ud_disassemble(&udis)) {
+		con_colourmsg(&nice_colour, "  %s\n", ud_insn_asm(&udis));
+	}
+}
+
+// vi: sw=4 ts=4 noet tw=80 cc=80