Update copyright and description.

[ldid.git] / ldid.cpp

diff --git a/ldid.cpp b/ldid.cpp
index 5ee0675713efb9623466618cd418a1b75c560b60..ff9358d23917bc83843f5fd18bc8e7168267a718 100644 (file)
--- a/ldid.cpp
+++ b/ldid.cpp
@@ -1,5 +1,5 @@
-/* JocStrap - Java/Objective-C Bootstrap
- * Copyright (C) 2007  Jay Freeman (saurik)
+/* ldid - (Mach-O) Link-Loader Identity Editor
+ * Copyright (C) 2007-2010  Jay Freeman (saurik)
 */
 
 /*
@@ -68,11 +68,7 @@ struct fat_arch {
 struct mach_header {
     uint32_t magic;
     uint32_t cputype;
-
-    // XXX: byte swapped?
-    uint16_t cpusubtype;
-    uint16_t caps;
-
+    uint32_t cpusubtype;
     uint32_t filetype;
     uint32_t ncmds;
     uint32_t sizeofcmds;
@@ -182,12 +178,14 @@ int32_t Swap_(int32_t value) {
     return Swap_(static_cast<uint32_t>(value));
 }
 
+bool little_(true);
+
 uint16_t Swap(uint16_t value) {
-    return true ? Swap_(value) : value;
+    return little_ ? Swap_(value) : value;
 }
 
 uint32_t Swap(uint32_t value) {
-    return true ? Swap_(value) : value;
+    return little_ ? Swap_(value) : value;
 }
 
 int16_t Swap(int16_t value) {
@@ -296,6 +294,14 @@ class Framework {
         return size_;
     }
 
+    uint32_t GetCPUType() const {
+        return Swap(mach_header_->cputype);
+    }
+
+    uint16_t GetCPUSubtype() const {
+        return Swap(mach_header_->cpusubtype) & 0xff;
+    }
+
     std::vector<struct load_command *> GetLoadCommands() {
         std::vector<struct load_command *> load_commands;
 
@@ -459,6 +465,13 @@ void sha1(uint8_t *hash, uint8_t *data, size_t size) {
 }
 
 int main(int argc, const char *argv[]) {
+    union {
+        uint16_t word;
+        uint8_t byte[2];
+    } endian = {1};
+
+    little_ = endian.byte[0];
+
     bool flag_R(false);
     bool flag_t(false);
     bool flag_p(false);
@@ -567,7 +580,7 @@ int main(int argc, const char *argv[]) {
             size_t size = _not(size_t);
             const char *arch; {
                 Framework framework(path);
-                framework->flags |= MH_DYLDLINK;
+                framework->flags = framework.Swap(framework.Swap(framework->flags) | MH_DYLDLINK);
 
                 _foreach (load_command, framework.GetLoadCommands()) {
                     uint32_t cmd(framework.Swap((*load_command)->cmd));
@@ -582,24 +595,34 @@ int main(int argc, const char *argv[]) {
                 if (size == _not(size_t))
                     size = framework.GetSize();
 
-                switch (framework->cputype) {
-                    case 7: switch (framework->cpusubtype) {
+                switch (framework.GetCPUType()) {
+                    case 7: switch (framework.GetCPUSubtype()) {
                         case 3: arch = "i386"; break;
                         default: arch = NULL; break;
                     } break;
 
-                    case 12: switch (framework->cpusubtype) {
+                    case 12: switch (framework.GetCPUSubtype()) {
                         case 0: arch = "arm"; break;
                         case 6: arch = "armv6"; break;
                         case 9: arch = "armv7"; break;
                         default: arch = NULL; break;
                     } break;
 
-                    case 16777223: switch (framework->cpusubtype) {
+                    case 18: switch (framework.GetCPUSubtype()) {
+                        case 10: arch = "ppc7400"; break;
+                        default: arch = NULL; break;
+                    } break;
+
+                    case 16777223: switch (framework.GetCPUSubtype()) {
                         case 3: arch = "x86_64"; break;
                         default: arch = NULL; break;
                     } break;
 
+                    case 16777234: switch (framework.GetCPUSubtype()) {
+                        case 0: arch = "ppc64"; break;
+                        default: arch = NULL; break;
+                    } break;
+
                     default: arch = NULL; break;
                 }
             }