OS X kernel support (see capstone-engine#528)

MichaelBuckley · Nov 10, 2015 · b8741bd · b8741bd
1 parent ae7c484
commit b8741bd
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diff --git a/Makefile b/Makefile
@@ -45,6 +45,12 @@ endif
 
 ifeq ($(CAPSTONE_HAS_OSXKERNEL), yes)
 CFLAGS += -DCAPSTONE_HAS_OSXKERNEL
+SDKROOT ?= $(shell xcodebuild -version -sdk macosx Path)
+CFLAGS += -mmacosx-version-min=10.5 \
+		  -isysroot$(SDKROOT) \
+		  -I$(SDKROOT)/System/Library/Frameworks/Kernel.framework/Headers \
+		  -mkernel \
+		  -fno-builtin
 endif
 
 CFLAGS += $(foreach arch,$(LIBARCHS),-arch $(arch))

diff --git a/config.mk b/config.mk
@@ -73,3 +73,10 @@ CAPSTONE_STATIC ?= yes
 # a shared library.
 
 CAPSTONE_SHARED ?= yes
+
+################################################################################
+# Change 'CAPSTONE_HAS_OSXKERNEL = no' to 'CAPSTONE_HAS_OSXKERNEL = yes' to
+# enable OS X kernel embedding support. If 'CAPSTONE_USE_SYS_DYN_MEM = yes',
+# then kern_os_* functions are used for memory management.
+
+CAPSTONE_HAS_OSXKERNEL ?= no
diff --git a/cs.c b/cs.c
@@ -79,12 +79,29 @@ static void archs_enable(void)
 unsigned int all_arch = 0;
 
 #ifdef CAPSTONE_USE_SYS_DYN_MEM
+#ifndef CAPSTONE_HAS_OSXKERNEL
 cs_malloc_t cs_mem_malloc = malloc;
 cs_calloc_t cs_mem_calloc = calloc;
 cs_realloc_t cs_mem_realloc = realloc;
 cs_free_t cs_mem_free = free;
 cs_vsnprintf_t cs_vsnprintf = vsnprintf;
 #else
+extern void* kern_os_malloc(size_t size);
+extern void kern_os_free(void* addr);
+extern void* kern_os_realloc(void* addr, size_t nsize);
+
+static void* cs_kern_os_calloc(size_t num, size_t size)
+{
+	return kern_os_malloc(num * size); // malloc bzeroes the buffer
+}
+
+cs_malloc_t cs_mem_malloc = kern_os_malloc;
+cs_calloc_t cs_mem_calloc = cs_kern_os_calloc;
+cs_realloc_t cs_mem_realloc = kern_os_realloc;
+cs_free_t cs_mem_free = kern_os_free;
+cs_vsnprintf_t cs_vsnprintf = vsnprintf;
+#endif
+#else
 cs_malloc_t cs_mem_malloc = NULL;
 cs_calloc_t cs_mem_calloc = NULL;
 cs_realloc_t cs_mem_realloc = NULL;

diff --git a/make.sh b/make.sh
@@ -169,5 +169,6 @@ case "$TARGET" in
   "ios_armv7" ) build_iOS armv7 $*;;
   "ios_armv7s" ) build_iOS armv7s $*;;
   "ios_arm64" ) build_iOS arm64 $*;;
+  "osx-kernel" ) CAPSTONE_USE_SYS_DYN_MEM=yes CAPSTONE_HAS_OSXKERNEL=yes CAPSTONE_ARCHS=x86 CAPSTONE_SHARED=no CAPSTONE_BUILD_CORE_ONLY=yes build $*;;
   * ) echo "Usage: make.sh [nix32|cross-win32|cross-win64|cygwin-mingw32|cygwin-mingw64|ios|ios_armv7|ios_armv7s|ios_arm64|cross-android arm|cross-android arm64|clang|gcc|install|uninstall]"; exit 1;;
 esac