From db7fbfe8029ecf9126a2cb0e7b0d2c372fe47daa Mon Sep 17 00:00:00 2001
From: Andrew Lamoureux <andrew@vector35.com>
Date: Tue, 21 Nov 2017 16:33:51 -0500
Subject: example: use arch plugins for cmdline disassembler

---
 examples/cmdline_disasm/src/disasm.cpp | 152 +++++++++++++++++++++++++++++++++
 1 file changed, 152 insertions(+)
 create mode 100644 examples/cmdline_disasm/src/disasm.cpp

(limited to 'examples/cmdline_disasm/src/disasm.cpp')

diff --git a/examples/cmdline_disasm/src/disasm.cpp b/examples/cmdline_disasm/src/disasm.cpp
new file mode 100644
index 00000000..c763fc11
--- /dev/null
+++ b/examples/cmdline_disasm/src/disasm.cpp
@@ -0,0 +1,152 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "binaryninjacore.h"
+#include "binaryninjaapi.h"
+
+using namespace BinaryNinja;
+
+/* forward declarations */
+int parse_nib(const char *str, uint8_t *val);
+int parse_uint8_hex(const char *str, uint8_t *result);
+
+/******************************************************************************
+ MAIN
+******************************************************************************/
+
+void usage(int ac, char **av)
+{
+	(void)ac;
+	printf("  syntax: %s <arch+mode> <byte0> <byte1> ...\n", av[0]);
+	printf("examples:\n");
+	printf("  %s x86 83   83 ec 0c\n", av[0]);
+	printf("  %s x86_64   48 89 e5\n", av[0]);
+	printf("  %s armv7    14 d0 4d e2\n", av[0]);
+	printf("  %s armv7eb  d0 14 e2 4d\n", av[0]);
+	printf("  %s thumb2   4f f0 00 0c\n", av[0]);
+	printf("  %s thumb2eb f0 4f 0c 00\n", av[0]);
+	printf("  %s ppc      93 e1 ff fc\n", av[0]);
+	printf("  %s aarch64  ff 43 00 d1\n", av[0]);
+	printf("  %s mips32   27 bd ff f0\n", av[0]);
+	printf("  %s mipsel32 f0 ff bd 27\n", av[0]);
+}
+
+int main(int ac, char **av)
+{
+	int rc = -1;
+	unsigned int i;
+
+	char					*archmode;
+	BNArchitecture			*arch;
+
+	size_t					nBytesDisasm;
+
+	uint8_t					input[64];
+	unsigned int			input_n;
+
+	BNInstructionTextToken	*ttResult = NULL;
+	size_t					ttCount;
+
+	char					*path_bundled_plugins;
+
+	/* plugin path */
+	path_bundled_plugins = BNGetBundledPluginDirectory();
+	printf("using bundled plugin path: %s\n", path_bundled_plugins);
+	BNSetBundledPluginDirectory(path_bundled_plugins);
+	BNInitCorePlugins();
+
+	/* parse architecture argument */
+	if(ac < 2)
+		{ usage(ac, av); goto cleanup; }
+	archmode = av[1];
+
+	printf("looking up architecture \"%s\"\n", archmode);
+	arch = BNGetArchitectureByName(archmode);
+	if(!arch) {
+		printf("ERROR: BNGetArchitectureByName() (is \"%s\" valid?)\n", archmode);
+		usage(ac, av);
+		goto cleanup;
+	}
+
+	/* parse bytes argument */
+	input_n = ac - 2;
+	for(i=0; i<input_n && i<sizeof(input); ++i) {
+		if(parse_uint8_hex(av[i+2], input+i)) {
+			printf("ERROR: can't parse byte: %s\n", av[i+2]);
+			goto cleanup;
+		}
+	}
+
+	printf("parsed bytes: ");
+	for(i=0; i<input_n; ++i)
+		printf("%02X ", input[i]);
+	printf("\n");
+
+	/* actually disassemble now */
+	nBytesDisasm = input_n;
+	BNGetInstructionText(arch, (const uint8_t *)input, 0, &nBytesDisasm,
+	  &ttResult, &ttCount);
+
+	//printf("%zu text tokens\n", ttCount);
+
+	for(i=0; i<ttCount; ++i)
+		printf("%s", ttResult[i].text);
+	printf("\n");
+
+	/* done! */
+	cleanup:
+	if(ttResult)
+		BNFreeInstructionText(ttResult, ttCount);
+	return rc;
+}
+
+/******************************************************************************
+ PARSING
+******************************************************************************/
+
+int parse_nib(const char *str, uint8_t *val)
+{
+	int rc = -1;
+	char c = *str;
+
+	if(c>='0' && c<='9') {
+		*val = c-'0';
+		rc = 0;
+	}
+	else if(c>='a' && c<='f') {
+		*val = 10 + (c-'a');
+		rc = 0;
+	}
+	else if(c>='A' && c<='F') {
+		*val = 10 + (c-'A');
+		rc = 0;
+	}
+	else {
+		printf("ERROR: %s('%c', ...)\n", __func__, c);
+	}
+
+	return rc;
+}
+
+int parse_uint8_hex(const char *str, uint8_t *result)
+{
+	int rc=-1;
+	uint8_t v1, v2;
+
+	if(parse_nib(str, &v1))
+		goto cleanup;
+	if(parse_nib(str+1, &v2))
+		goto cleanup;
+
+	*result = (v1 << 4) | v2;
+	rc = 0;
+
+	cleanup:
+	return rc;
+}
+
-- 
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