Add enough headers to support bdwgc

Author: aykevl

README.markdown

@@ -76,7 +76,7 @@ This is only rarely needed: macOS binaries will usually run just fine on a newer
 
 This project is licensed under APSL 2.0, a variety of BSD style licenses, and public domain code:
 
-  * `src/usr/include` is extracted from the Libc, xnu, libpthread, libdispatch, and Libm. The source files are under a mix of the APSL 2.0 and a variety of BSD-style licenses. There are a few files that just say "all rights reserved". All those files have been replaced with a public domain version so they are also in effect open source.
+  * `src/usr/include` is extracted from the Libc, xnu, cctools, libpthread, libdispatch, and Libm. The source files are under a mix of the APSL 2.0 and a variety of BSD-style licenses. There are a few files that just say "all rights reserved". All those files have been replaced with a public domain version so they are also in effect open source.
   * `src/*/libSystem.s` is extracted from the above, but because it's only a list of function names I don't believe it is covered by copyright and therefore can be considered public domain. If it is covered by copyright (I'm not a lawyer), it is covered by the same copyright as `src/usr/include` above.
   * Other files like the various update scripts are placed in the public domain.
 

generate-stubs.py

@@ -32,7 +32,13 @@
 def generateStubs(sysroot, outfile, target):
     # These symbols are not defined in the header files, but must be declared
     # anyway.
-    symbols = {'dyld_stub_binder', '___bzero', '__tlv_bootstrap'}
+    symbols = {
+        'dyld_stub_binder',
+        '___bzero',
+        '__tlv_bootstrap',
+        '___memmove_chk', '___memset_chk',
+        '___stack_chk_guard', '___stack_chk_fail',
+    }
 
     # Parse the src/libSystem.h file to get a list of functions declared in libSystem.
     index = clang.cindex.Index.create()

src/TargetConditionals.h

@@ -0,0 +1,33 @@
+// This file is placed in the public domain.
+//
+// This file is a replacement for TargetConditionals.h for which I can't find an
+// open source version in an open source Apple library. (There is one in
+// CarbonHeaders but it is outdated doesn't support ARM64).
+
+#define TARGET_CPU_PPC          0
+#define TARGET_CPU_PPC64        0
+#define TARGET_CPU_68K          0
+#define TARGET_CPU_X86          0
+#define TARGET_CPU_X86_64       defined(__x86_64__)
+#define TARGET_CPU_ARM          0
+#define TARGET_CPU_ARM64        defined(__arm64__)
+#define TARGET_CPU_MIPS         0
+#define TARGET_CPU_SPARC        0
+#define TARGET_CPU_ALPHA        0
+
+// We only support macOS (OSX) right now.
+#define TARGET_OS_WIN32       0
+#define TARGET_OS_WINDOWS     0
+#define TARGET_OS_UNIX        0
+#define TARGET_OS_LINUX       0
+#define TARGET_OS_MAC         1
+#define TARGET_OS_OSX         1
+#define TARGET_OS_IPHONE      0
+#define TARGET_OS_IOS         0
+#define TARGET_OS_MACCATALYST 0
+#define TARGET_OS_TV          0
+#define TARGET_OS_WATCH       0
+#define TARGET_OS_VISION      0
+#define TARGET_OS_BRIDGE      0
+#define TARGET_OS_SIMULATOR   0
+#define TARGET_OS_DRIVERKIT   0

src/arm64/libSystem.s

@@ -55,6 +55,12 @@ ___math_errhandling:
 .global ___mb_cur_max
 ___mb_cur_max:
 
+.global ___memmove_chk
+___memmove_chk:
+
+.global ___memset_chk
+___memset_chk:
+
 .global ___nan
 ___nan:
 
@@ -76,6 +82,12 @@ ___sputc:
 .global ___srget
 ___srget:
 
+.global ___stack_chk_fail
+___stack_chk_fail:
+
+.global ___stack_chk_guard
+___stack_chk_guard:
+
 .global ___stderrp
 ___stderrp: