//============================================================
//
//  sdlos_*.c - OS specific low level code
//
//  Copyright (c) 1996-2010, Nicola Salmoria and the MAME Team.
//  Visit http://mamedev.org for licensing and usage restrictions.
//
//  SDLMAME by Olivier Galibert and R. Belmont
//
//============================================================

#include <sys/mman.h>
#include <signal.h>
#ifdef MAME_DEBUG
#include <unistd.h>
#endif

// MAME headers
#include "osdcore.h"


//============================================================
//  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)
	return (void *)mmap(0, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0);
#elif defined(SDLMAME_UNIX)
	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
//============================================================

void osd_break_into_debugger(const char *message)
{
	#ifdef MAME_DEBUG
	printf("MAME exception: %s\n", message);
	printf("Attempting to fall into debugger\n");
	kill(getpid(), SIGTRAP);
	#else
	printf("Ignoring MAME exception: %s\n", message);
	#endif
}
