From ac1ed5b7f634062d899320bc19ff65d037b9a04e Mon Sep 17 00:00:00 2001
From: Pierre Pronchery <khorben@defora.org>
Date: Sun, 27 Apr 2025 00:24:42 +0200
Subject: [PATCH] format: import a Mach-O plug-in

---
 src/format/mach-o.c     | 136 ++++++++++++++++++++++++++++++++++++++++
 src/format/project.conf |   6 +-
 2 files changed, 141 insertions(+), 1 deletion(-)
 create mode 100644 src/format/mach-o.c

diff --git a/src/format/mach-o.c b/src/format/mach-o.c
new file mode 100644
index 0000000..0afe0fc
--- /dev/null
+++ b/src/format/mach-o.c
@@ -0,0 +1,136 @@
+/* $Id$ */
+/* Copyright (c) 2025 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS Devel Asm */
+/* This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+
+
+#include <System.h>
+#include <string.h>
+#include "Asm.h"
+
+
+/* Mach-O */
+/* private */
+/* types */
+struct _AsmFormatPlugin
+{
+	AsmFormatPluginHelper * helper;
+};
+
+
+/* prototypes */
+/* plug-in */
+static AsmFormatPlugin * _macho_init(AsmFormatPluginHelper * helper,
+		char const * arch);
+static int _macho_destroy(AsmFormatPlugin * format);
+static char const * _macho_guess(AsmFormatPlugin * format, char const * hint);
+static int _macho_section(AsmFormatPlugin * format, char const * section);
+static int _macho_decode(AsmFormatPlugin * format, int raw);
+static int _macho_decode_section(AsmFormatPlugin * format, AsmSection * section,
+		AsmArchInstructionCall ** calls, size_t * calls_cnt);
+
+
+/* public */
+/* variables */
+/* plug-in */
+AsmFormatPluginDefinition format_plugin =
+{
+	"mach-o",
+	"Mach-O file",
+	LICENSE_GNU_LGPL3_FLAGS,
+	NULL,
+	0,
+	_macho_init,
+	_macho_destroy,
+	_macho_guess,
+	NULL,
+	NULL,
+	_macho_section,
+	NULL,
+	_macho_decode,
+	_macho_decode_section
+};
+
+
+/* private */
+/* functions */
+/* plug-in */
+/* macho_init */
+static AsmFormatPlugin * _macho_init(AsmFormatPluginHelper * helper,
+		char const * arch)
+{
+	AsmFormatPlugin * macho;
+	(void) arch;
+
+	if((macho = object_new(sizeof(*macho))) == NULL)
+		return NULL;
+	macho->helper = helper;
+	return macho;
+}
+
+
+/* macho_destroy */
+static int _macho_destroy(AsmFormatPlugin * format)
+{
+	object_delete(format);
+	return 0;
+}
+
+
+/* macho_guess */
+static char const * _macho_guess(AsmFormatPlugin * format, char const * hint)
+{
+	(void) format;
+
+	return hint;
+}
+
+
+/* macho_section */
+static int _macho_section(AsmFormatPlugin * format, char const * section)
+{
+	(void) format;
+	(void) section;
+
+	/* ignore sections */
+	return 0;
+}
+
+
+/* macho_decode */
+static int _macho_decode(AsmFormatPlugin * format, int raw)
+{
+	AsmFormatPluginHelper * helper = format->helper;
+	off_t offset;
+	(void) raw;
+
+	if((offset = helper->seek(helper->format, 0, SEEK_END)) >= 0
+			&& helper->set_section(helper->format, 0, 0, ".text", 0,
+				offset, 0) != NULL)
+		return 0;
+	return -1;
+}
+
+
+/* macho_decode_section */
+static int _macho_decode_section(AsmFormatPlugin * format, AsmSection * section,
+		AsmArchInstructionCall ** calls, size_t * calls_cnt)
+{
+	AsmFormatPluginHelper * helper = format->helper;
+
+	if(section->id != 0)
+		return -1;
+	return helper->decode(helper->format, section->offset, section->size,
+			section->base, calls, calls_cnt);
+}
diff --git a/src/format/project.conf b/src/format/project.conf
index 4d3c2aa..f0c8212 100644
--- a/src/format/project.conf
+++ b/src/format/project.conf
@@ -1,4 +1,4 @@
-targets=dex,elf,flat,java,mbr,pe,template
+targets=dex,elf,flat,java,mach-o,mbr,pe,template
 cppflags_force=-I../../include
 cflags_force=`pkg-config --cflags libSystem` -fPIC
 cflags=-W -Wall -g -O2 -D_FORTIFY_SOURCE=2 -fstack-protector
@@ -33,6 +33,10 @@ type=plugin
 sources=java.c
 install=$(LIBDIR)/Asm/format
 
+[mach-o]
+type=plugin
+sources=mach-o.c
+
 [mbr]
 type=plugin
 sources=mbr.c