* Copyright (c) 2010 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <stdbool.h>
#include <strings.h>
#include <unistd.h>
+#include <mach/vm_page_size.h>
#include "_libkernel_init.h"
extern int mach_init(void);
#if TARGET_OS_OSX
+
+#if !defined(__i386__)
+
+#include "system-version-compat-support.h"
+#include <sys/sysctl.h>
+
+extern bool _system_version_compat_check_path_suffix(const char *orig_path);
+extern int _system_version_compat_open_shim(int opened_fd, int openat_fd, const char *orig_path, int oflag, mode_t mode,
+ int (*close_syscall)(int), int (*open_syscall)(const char *, int, mode_t),
+ int (*openat_syscall)(int, const char *, int, mode_t),
+ int (*fcntl_syscall)(int, int, long));
+
+extern bool (*system_version_compat_check_path_suffix)(const char *orig_path);
+extern int (*system_version_compat_open_shim)(int opened_fd, int openat_fd, const char *orig_path, int oflag, mode_t mode,
+ int (*close_syscall)(int), int (*open_syscall)(const char *, int, mode_t),
+ int (*openat_syscall)(int, const char *, int, mode_t),
+ int (*fcntl_syscall)(int, int, long));
+
+extern system_version_compat_mode_t system_version_compat_mode;
+
+int __sysctlbyname(const char *name, size_t namelen, void *oldp, size_t *oldlenp, void *newp, size_t newlen);
+#endif /* !defined(__i386__) */
+
__attribute__((visibility("default")))
extern bool _os_xbs_chrooted;
bool _os_xbs_chrooted;
-#endif
+#endif /* TARGET_OS_OSX */
/* dlsym() funcptr is for legacy support in exc_catcher */
void* (*_dlsym)(void*, const char*) __attribute__((visibility("hidden")));
__attribute__((visibility("hidden")))
_libkernel_functions_t _libkernel_functions;
+
void
__libkernel_init(_libkernel_functions_t fns,
- const char *envp[] __attribute__((unused)),
- const char *apple[] __attribute__((unused)),
- const struct ProgramVars *vars __attribute__((unused)))
+ const char *envp[] __attribute__((unused)),
+ const char *apple[] __attribute__((unused)),
+ const struct ProgramVars *vars __attribute__((unused)))
{
_libkernel_functions = fns;
if (fns->dlsym) {
_dlsym = fns->dlsym;
}
mach_init();
+#if TARGET_OS_OSX
+ for (size_t i = 0; envp[i]; i++) {
+
+#if defined(__i386__) || defined(__x86_64__)
+ const char *VM_KERNEL_PAGE_SHIFT_ENV = "VM_KERNEL_PAGE_SIZE_4K=1";
+ if (vm_kernel_page_shift != 12 && strcmp(VM_KERNEL_PAGE_SHIFT_ENV, envp[i]) == 0) {
+ vm_kernel_page_shift = 12;
+ vm_kernel_page_size = 1 << vm_kernel_page_shift;
+ vm_kernel_page_mask = vm_kernel_page_size - 1;
+ }
+#endif /* defined(__i386__) || defined(__x86_64__) */
+ }
+#endif /* TARGET_OS_OSX */
+}
+
+void
+__libkernel_init_late(_libkernel_late_init_config_t config)
+{
+ if (config->version >= 1) {
+#if TARGET_OS_OSX && !defined(__i386__)
+ if (config->enable_system_version_compat) {
+ /* enable the version compatibility shim for this process (macOS only) */
+
+ /* first hook up the shims we reference from open{at}() */
+ system_version_compat_check_path_suffix = _system_version_compat_check_path_suffix;
+ system_version_compat_open_shim = _system_version_compat_open_shim;
+
+ system_version_compat_mode = SYSTEM_VERSION_COMPAT_MODE_MACOSX;
+
+ /*
+ * tell the kernel the shim is enabled for this process so it can shim any
+ * necessary sysctls
+ */
+ int enable = 1;
+ __sysctlbyname("kern.system_version_compat", strlen("kern.system_version_compat"),
+ NULL, NULL, &enable, sizeof(enable));
+ } else if ((config->version >= 2) && config->enable_ios_version_compat) {
+ /* enable the iOS ProductVersion compatibility shim for this process */
+
+ /* first hook up the shims we reference from open{at}() */
+ system_version_compat_check_path_suffix = _system_version_compat_check_path_suffix;
+ system_version_compat_open_shim = _system_version_compat_open_shim;
+
+ system_version_compat_mode = SYSTEM_VERSION_COMPAT_MODE_IOS;
+
+ /*
+ * We don't currently shim any sysctls for iOS apps running on macOS so we
+ * don't need to inform the kernel that this app has the SystemVersion shim enabled.
+ */
+ }
+#endif /* TARGET_OS_OSX && !defined(__i386__) */
+ }
}
projects / apple / xnu.git / blobdiff