//===----------------------------------------------------------------------===//
#include "Unix.h"
+#include "llvm/System/DataTypes.h"
#include "llvm/System/Process.h"
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
-/// AllocateRWXMemory - Allocate a slab of memory with read/write/execute
+#ifdef __APPLE__
+#include <mach/mach.h>
+#endif
+
+/// AllocateRWX - Allocate a slab of memory with read/write/execute
/// permissions. This is typically used for JIT applications where we want
/// to emit code to the memory then jump to it. Getting this type of memory
/// is very OS specific.
///
llvm::sys::MemoryBlock
-llvm::sys::Memory::AllocateRWX(unsigned NumBytes, const MemoryBlock* NearBlock,
+llvm::sys::Memory::AllocateRWX(size_t NumBytes, const MemoryBlock* NearBlock,
std::string *ErrMsg) {
if (NumBytes == 0) return MemoryBlock();
- long pageSize = Process::GetPageSize();
- unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
+ size_t pageSize = Process::GetPageSize();
+ size_t NumPages = (NumBytes+pageSize-1)/pageSize;
int fd = -1;
#ifdef NEED_DEV_ZERO_FOR_MMAP
void* start = NearBlock ? (unsigned char*)NearBlock->base() +
NearBlock->size() : 0;
+#if defined(__APPLE__) && defined(__arm__)
+ void *pa = ::mmap(start, pageSize*NumPages, PROT_READ|PROT_EXEC,
+ flags, fd, 0);
+#else
void *pa = ::mmap(start, pageSize*NumPages, PROT_READ|PROT_WRITE|PROT_EXEC,
flags, fd, 0);
+#endif
if (pa == MAP_FAILED) {
if (NearBlock) //Try again without a near hint
return AllocateRWX(NumBytes, 0);
MakeErrMsg(ErrMsg, "Can't allocate RWX Memory");
return MemoryBlock();
}
- MemoryBlock result;
- result.Address = pa;
- result.Size = NumPages*pageSize;
- return result;
-}
-
-/// AllocateRWMemory - Allocate a slab of memory with read/write permissions.
-/// This memory needs to have executable permissions set before it can be used
-/// to execute JIT'ed code.
-llvm::sys::MemoryBlock
-llvm::sys::Memory::AllocateRW(unsigned NumBytes, const MemoryBlock* NearBlock,
- std::string *ErrMsg) {
- if (NumBytes == 0) return MemoryBlock();
-
- long pageSize = Process::GetPageSize();
- unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
- int fd = -1;
-#ifdef NEED_DEV_ZERO_FOR_MMAP
- static int zero_fd = open("/dev/zero", O_RDWR);
- if (zero_fd == -1) {
- MakeErrMsg(ErrMsg, "Can't open /dev/zero device");
- return MemoryBlock();
+#if defined(__APPLE__) && defined(__arm__)
+ kern_return_t kr = vm_protect(mach_task_self(), (vm_address_t)pa,
+ (vm_size_t)(pageSize*NumPages), 0,
+ VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_COPY);
+ if (KERN_SUCCESS != kr) {
+ MakeErrMsg(ErrMsg, "vm_protect max RX failed");
+ return sys::MemoryBlock();
}
- fd = zero_fd;
-#endif
- int flags = MAP_PRIVATE |
-#ifdef HAVE_MMAP_ANONYMOUS
- MAP_ANONYMOUS
-#else
- MAP_ANON
+ kr = vm_protect(mach_task_self(), (vm_address_t)pa,
+ (vm_size_t)(pageSize*NumPages), 0,
+ VM_PROT_READ | VM_PROT_WRITE);
+ if (KERN_SUCCESS != kr) {
+ MakeErrMsg(ErrMsg, "vm_protect RW failed");
+ return sys::MemoryBlock();
+ }
#endif
- ;
- void* start = NearBlock ? (unsigned char*)NearBlock->base() +
- NearBlock->size() : 0;
-
- void *pa = ::mmap(start, pageSize*NumPages, PROT_READ|PROT_WRITE,
- flags, fd, 0);
- if (pa == MAP_FAILED) {
- if (NearBlock) //Try again without a near hint
- return AllocateRW(NumBytes, 0);
-
- MakeErrMsg(ErrMsg, "Can't allocate RWX Memory");
- return MemoryBlock();
- }
MemoryBlock result;
result.Address = pa;
result.Size = NumPages*pageSize;
+
return result;
}
return false;
}
+bool llvm::sys::Memory::setWritable (MemoryBlock &M, std::string *ErrMsg) {
+#if defined(__APPLE__) && defined(__arm__)
+ if (M.Address == 0 || M.Size == 0) return false;
+ sys::Memory::InvalidateInstructionCache(M.Address, M.Size);
+ kern_return_t kr = vm_protect(mach_task_self(), (vm_address_t)M.Address,
+ (vm_size_t)M.Size, 0, VM_PROT_READ | VM_PROT_WRITE);
+ return KERN_SUCCESS == kr;
+#else
+ return true;
+#endif
+}
+
+bool llvm::sys::Memory::setExecutable (MemoryBlock &M, std::string *ErrMsg) {
+#if defined(__APPLE__) && defined(__arm__)
+ if (M.Address == 0 || M.Size == 0) return false;
+ sys::Memory::InvalidateInstructionCache(M.Address, M.Size);
+ kern_return_t kr = vm_protect(mach_task_self(), (vm_address_t)M.Address,
+ (vm_size_t)M.Size, 0, VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_COPY);
+ return KERN_SUCCESS == kr;
+#else
+ return false;
+#endif
+}
+
+bool llvm::sys::Memory::setRangeWritable(const void *Addr, size_t Size) {
+#if defined(__APPLE__) && defined(__arm__)
+ kern_return_t kr = vm_protect(mach_task_self(), (vm_address_t)Addr,
+ (vm_size_t)Size, 0,
+ VM_PROT_READ | VM_PROT_WRITE);
+ return KERN_SUCCESS == kr;
+#else
+ return true;
+#endif
+}
+
+bool llvm::sys::Memory::setRangeExecutable(const void *Addr, size_t Size) {
+#if defined(__APPLE__) && defined(__arm__)
+ kern_return_t kr = vm_protect(mach_task_self(), (vm_address_t)Addr,
+ (vm_size_t)Size, 0,
+ VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_COPY);
+ return KERN_SUCCESS == kr;
+#else
+ return true;
+#endif
+}