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Diffstat (limited to 'src/osd/modules/lib/osdlib_unix.cpp')
-rw-r--r--src/osd/modules/lib/osdlib_unix.cpp134
1 files changed, 77 insertions, 57 deletions
diff --git a/src/osd/modules/lib/osdlib_unix.cpp b/src/osd/modules/lib/osdlib_unix.cpp
index c2a34be7c98..1c51a2666c7 100644
--- a/src/osd/modules/lib/osdlib_unix.cpp
+++ b/src/osd/modules/lib/osdlib_unix.cpp
@@ -8,23 +8,23 @@
//
//============================================================
-#include <cstdlib>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <csignal>
-#include <dlfcn.h>
+// MAME headers
+#include "osdcore.h"
+#include "osdlib.h"
+#include <SDL2/SDL.h>
+
+#include <csignal>
#include <cstdio>
+#include <cstdlib>
#include <iomanip>
#include <memory>
+#include <dlfcn.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <unistd.h>
-// MAME headers
-#include "osdcore.h"
-#include "osdlib.h"
-
-#include <SDL2/SDL.h>
//============================================================
// osd_getenv
@@ -54,37 +54,6 @@ void osd_process_kill()
}
//============================================================
-// osd_alloc_executable
-//
-// allocates "size" bytes of executable memory. this must take
-// things like NX support into account.
-//============================================================
-
-void *osd_alloc_executable(size_t size)
-{
-#if defined(SDLMAME_BSD) || defined(SDLMAME_MACOSX) || defined(SDLMAME_EMSCRIPTEN)
- return (void *)mmap(0, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0);
-#else
- return (void *)mmap(0, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, 0, 0);
-#endif
-}
-
-//============================================================
-// osd_free_executable
-//
-// frees memory allocated with osd_alloc_executable
-//============================================================
-
-void osd_free_executable(void *ptr, size_t size)
-{
-#ifdef SDLMAME_SOLARIS
- munmap((char *)ptr, size);
-#else
- munmap(ptr, size);
-#endif
-}
-
-//============================================================
// osd_break_into_debugger
//============================================================
@@ -133,25 +102,23 @@ int osd_getpid(void)
return getpid();
}
-//============================================================
-// dynamic_module_posix_impl
-//============================================================
namespace osd {
+
+namespace {
+
class dynamic_module_posix_impl : public dynamic_module
{
public:
- dynamic_module_posix_impl(std::vector<std::string> &libraries)
- : m_module(nullptr)
+ dynamic_module_posix_impl(std::vector<std::string> &&libraries) : m_libraries(std::move(libraries))
{
- m_libraries = libraries;
}
virtual ~dynamic_module_posix_impl() override
{
- if (m_module != nullptr)
+ if (m_module)
dlclose(m_module);
- };
+ }
protected:
virtual generic_fptr_t get_symbol_address(char const *symbol) override
@@ -161,19 +128,17 @@ protected:
* one of them, all additional symbols will be loaded from the same library
*/
if (m_module)
- {
return reinterpret_cast<generic_fptr_t>(dlsym(m_module, symbol));
- }
for (auto const &library : m_libraries)
{
- void *module = dlopen(library.c_str(), RTLD_LAZY);
+ void *const module = dlopen(library.c_str(), RTLD_LAZY);
if (module != nullptr)
{
- generic_fptr_t function = reinterpret_cast<generic_fptr_t>(dlsym(module, symbol));
+ generic_fptr_t const function = reinterpret_cast<generic_fptr_t>(dlsym(module, symbol));
- if (function != nullptr)
+ if (function)
{
m_module = module;
return function;
@@ -190,12 +155,67 @@ protected:
private:
std::vector<std::string> m_libraries;
- void * m_module;
+ void * m_module = nullptr;
};
+} // anonymous namespace
+
+
+bool invalidate_instruction_cache(void const *start, std::size_t size)
+{
+ char const *const begin(reinterpret_cast<char const *>(start));
+ char const *const end(begin + size);
+ __builtin___clear_cache(const_cast<char *>(begin), const_cast<char *>(end));
+ return true;
+}
+
+
+void *virtual_memory_allocation::do_alloc(std::initializer_list<std::size_t> blocks, std::size_t &size, std::size_t &page_size)
+{
+ long const p(sysconf(_SC_PAGE_SIZE));
+ if (0 >= p)
+ return nullptr;
+ std::size_t s(0);
+ for (std::size_t b : blocks)
+ s += (b + p - 1) / p;
+ s *= p;
+ if (!s)
+ return nullptr;
+#if defined(SDLMAME_BSD) || defined(SDLMAME_MACOSX) || defined(SDLMAME_EMSCRIPTEN)
+ int const fd(-1);
+#else
+ // TODO: portable applications are supposed to use -1 for anonymous mappings - detect whatever requires 0 specifically
+ int const fd(0);
+#endif
+ void *const result(mmap(nullptr, s, PROT_NONE, MAP_ANON | MAP_SHARED, fd, 0));
+ if (result == (void *)-1)
+ return nullptr;
+ size = s;
+ page_size = p;
+ return result;
+}
+
+void virtual_memory_allocation::do_free(void *start, std::size_t size)
+{
+ munmap(reinterpret_cast<char *>(start), size);
+}
+
+bool virtual_memory_allocation::do_set_access(void *start, std::size_t size, unsigned access)
+{
+ int prot((NONE == access) ? PROT_NONE : 0);
+ if (access & READ)
+ prot |= PROT_READ;
+ if (access & WRITE)
+ prot |= PROT_WRITE;
+ if (access & EXECUTE)
+ prot |= PROT_EXEC;
+ return mprotect(reinterpret_cast<char *>(start), size, prot) == 0;
+}
+
+
dynamic_module::ptr dynamic_module::open(std::vector<std::string> &&names)
{
- return std::make_unique<dynamic_module_posix_impl>(names);
+ return std::make_unique<dynamic_module_posix_impl>(std::move(names));
}
} // namespace osd