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Merge pull request #187 from tevador/pr-netbsd

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Fix compilation and JIT support on NetBSD

1. Disable hugepages (not supported).
2. Force W^X (required).
3. When allocating JIT memory, PROT_EXEC must be reserved
   in order to set the pages executable later.
This commit is contained in:
tevador 2020-06-28 16:35:19 +02:00 • committed by GitHub
commit a1c08a2f41
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6 changed files with 21 additions and 11 deletions
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4
src/jit_compiler.hpp
View file

@ -35,3 +35,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#else
#include "jit_compiler_fallback.hpp"
#endif
#if defined(__OpenBSD__) || defined(__NetBSD__)
#define RANDOMX_FORCE_SECURE
#endif

2
src/randomx.cpp
View file

@ -43,7 +43,7 @@ extern "C" {
randomx_flags randomx_get_flags() {
randomx_flags flags = RANDOMX_HAVE_COMPILER ? RANDOMX_FLAG_JIT : RANDOMX_FLAG_DEFAULT;
randomx::Cpu cpu;
#ifdef __OpenBSD__
#ifdef RANDOMX_FORCE_SECURE
if (flags == RANDOMX_FLAG_JIT) {
flags |= RANDOMX_FLAG_SECURE;
}

2
src/tests/affinity.cpp
View file

@ -65,7 +65,7 @@ set_thread_affinity(std::thread::native_handle_type thread,
(thread_policy_t)&policy, 1);
#elif defined(_WIN32) || defined(__CYGWIN__)
rc = SetThreadAffinityMask(reinterpret_cast<HANDLE>(thread), 1ULL << cpuid) == 0 ? -2 : 0;
#elif !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__ANDROID__)
#elif !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__ANDROID__) && !defined(__NetBSD__)
cpu_set_t cs;
CPU_ZERO(&cs);
CPU_SET(cpuid, &cs);

5
src/tests/benchmark.cpp
View file

@ -40,6 +40,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "../dataset.hpp"
#include "../blake2/endian.h"
#include "../common.hpp"
#include "../jit_compiler.hpp"
#ifdef _WIN32
#include <windows.h>
#include <VersionHelpers.h>
@ -199,7 +200,7 @@ int main(int argc, char** argv) {
}
if (jit) {
flags |= RANDOMX_FLAG_JIT;
#ifdef __OpenBSD__
#ifdef RANDOMX_FORCE_SECURE
flags |= RANDOMX_FLAG_SECURE;
#endif
}
@ -211,7 +212,7 @@ int main(int argc, char** argv) {
if (miningMode) {
flags |= RANDOMX_FLAG_FULL_MEM;
}
#ifndef __OpenBSD__
#ifndef RANDOMX_FORCE_SECURE
if (secure) {
flags |= RANDOMX_FLAG_SECURE;
}

10
src/tests/tests.cpp
View file

@ -143,7 +143,7 @@ int main() {
randomx::JitCompiler jit;
jit.generateSuperscalarHash(cache->programs, cache->reciprocalCache);
jit.generateDatasetInitCode();
#ifdef __OpenBSD__
#ifdef RANDOMX_FORCE_SECURE
jit.enableExecution();
#else
jit.enableAll();
@ -954,7 +954,7 @@ int main() {
assert(ibc.memMask == randomx::ScratchpadL3Mask);
});
#ifdef __OpenBSD__
#ifdef RANDOMX_FORCE_SECURE
vm = randomx_create_vm(RANDOMX_FLAG_DEFAULT | RANDOMX_FLAG_SECURE, cache, nullptr);
#else
vm = randomx_create_vm(RANDOMX_FLAG_DEFAULT, cache, nullptr);
@ -1009,10 +1009,10 @@ int main() {
vm = nullptr;
cache = randomx_alloc_cache(RANDOMX_FLAG_JIT);
initCache("test key 000");
#ifdef __OpenBSD__
vm = randomx_create_vm(RANDOMX_FLAG_DEFAULT | RANDOMX_FLAG_SECURE, cache, nullptr);
#ifdef RANDOMX_FORCE_SECURE
vm = randomx_create_vm(RANDOMX_FLAG_JIT | RANDOMX_FLAG_SECURE, cache, nullptr);
#else
vm = randomx_create_vm(RANDOMX_FLAG_DEFAULT, cache, nullptr);
vm = randomx_create_vm(RANDOMX_FLAG_JIT, cache, nullptr);
#endif
}

9
src/virtual_memory.cpp
View file

@ -94,7 +94,12 @@ void* allocMemoryPages(std::size_t bytes) {
if (mem == nullptr)
throw std::runtime_error(getErrorMessage("allocMemoryPages - VirtualAlloc"));
#else
mem = mmap(nullptr, bytes, PAGE_READWRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
#if defined(__NetBSD__)
#define RESERVED_FLAGS PROT_MPROTECT(PROT_EXEC)
#else
#define RESERVED_FLAGS 0
#endif
mem = mmap(nullptr, bytes, PAGE_READWRITE | RESERVED_FLAGS, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
if (mem == MAP_FAILED)
throw std::runtime_error("allocMemoryPages - mmap failed");
#endif
@ -141,7 +146,7 @@ void* allocLargePagesMemory(std::size_t bytes) {
mem = mmap(nullptr, bytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, VM_FLAGS_SUPERPAGE_SIZE_2MB, 0);
#elif defined(__FreeBSD__)
mem = mmap(nullptr, bytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_ALIGNED_SUPER, -1, 0);
#elif defined(__OpenBSD__)
#elif defined(__OpenBSD__) || defined(__NetBSD__)
mem = MAP_FAILED; // OpenBSD does not support huge pages
#else
mem = mmap(nullptr, bytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, -1, 0);