RetroArch/frontend/platform/platform_gx_exec.c
2013-04-29 22:05:21 -04:00

150 lines
4.6 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
* Copyright (C) 2011-2013 - Daniel De Matteis
* Copyright (C) 2012-2013 - Michael Lelli
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <string.h>
#include <fat.h>
#include <gctypes.h>
#include <ogc/cache.h>
#include <ogc/lwp_threads.h>
#include <ogc/system.h>
#include <ogc/usbstorage.h>
#include <sdcard/wiisd_io.h>
#define EXECUTE_ADDR ((uint8_t *) 0x91800000)
#define BOOTER_ADDR ((uint8_t *) 0x93000000)
#define ARGS_ADDR ((uint8_t *) 0x93200000)
extern uint8_t _binary_wii_app_booter_app_booter_bin_start[];
extern uint8_t _binary_wii_app_booter_app_booter_bin_end[];
#define booter_start _binary_wii_app_booter_app_booter_bin_start
#define booter_end _binary_wii_app_booter_app_booter_bin_end
#include "../../retroarch_logger.h"
#include "../../file.h"
static void dol_copy_argv_path(const char *dolpath, const char *argpath)
{
char tmp[PATH_MAX];
size_t len, t_len;
struct __argv *argv = (struct __argv *) ARGS_ADDR;
memset(ARGS_ADDR, 0, sizeof(struct __argv));
char *cmdline = (char *) ARGS_ADDR + sizeof(struct __argv);
argv->argvMagic = ARGV_MAGIC;
argv->commandLine = cmdline;
len = 0;
// a device-less fullpath
if (dolpath[0] == '/')
{
char *dev = strchr(__system_argv->argv[0], ':');
t_len = dev - __system_argv->argv[0] + 1;
memcpy(cmdline, __system_argv->argv[0], t_len);
len += t_len;
}
// a relative path
else if (strstr(dolpath, "sd:/") != dolpath && strstr(dolpath, "usb:/") != dolpath &&
strstr(dolpath, "carda:/") != dolpath && strstr(dolpath, "cardb:/") != dolpath)
{
fill_pathname_parent_dir(tmp, __system_argv->argv[0], sizeof(tmp));
t_len = strlen(tmp);
memcpy(cmdline, tmp, t_len);
len += t_len;
}
t_len = strlen(dolpath);
memcpy(cmdline + len, dolpath, t_len);
len += t_len;
cmdline[len++] = 0;
#ifndef IS_SALAMANDER
// file must be split into two parts, the path and the actual filename
// done to be compatible with loaders
if (argpath && strchr(argpath, '/') != NULL)
{
// basedir
fill_pathname_parent_dir(tmp, argpath, sizeof(tmp));
t_len = strlen(tmp);
memcpy(cmdline + len, tmp, t_len);
len += t_len;
cmdline[len++] = 0;
// filename
char *name = strrchr(argpath, '/') + 1;
t_len = strlen(name);
memcpy(cmdline + len, name, t_len);
len += t_len;
cmdline[len++] = 0;
}
#endif
cmdline[len++] = 0;
argv->length = len;
DCFlushRange(ARGS_ADDR, sizeof(struct __argv) + argv->length);
}
// WARNING: after we move any data into EXECUTE_ADDR, we can no longer use any
// heap memory and are restricted to the stack only
static void rarch_console_exec(const char *path, bool should_load_game)
{
RARCH_LOG("Attempt to load executable: [%s].\n", path);
FILE * fp = fopen(path, "rb");
if (fp == NULL)
{
RARCH_ERR("Could not open DOL file %s.\n", path);
return;
}
fseek(fp, 0, SEEK_END);
size_t size = ftell(fp);
fseek(fp, 0, SEEK_SET);
// try to allocate a buffer for it. if we can't, fail
void *dol = malloc(size);
if (!dol)
{
RARCH_ERR("Could not execute DOL file %s.\n", path);
fclose(fp);
return;
}
fread(dol, 1, size, fp);
fclose(fp);
fatUnmount("carda:");
fatUnmount("cardb:");
fatUnmount("sd:");
fatUnmount("usb:");
__io_wiisd.shutdown();
__io_usbstorage.shutdown();
// luckily for us, newlib's memmove doesn't allocate a seperate buffer for
// copying in situations of overlap, so it's safe to do this
memmove(EXECUTE_ADDR, dol, size);
DCFlushRange(EXECUTE_ADDR, size);
dol_copy_argv_path(path, should_load_game ? g_extern.fullpath : NULL);
size_t booter_size = booter_end - booter_start;
memcpy(BOOTER_ADDR, booter_start, booter_size);
DCFlushRange(BOOTER_ADDR, booter_size);
RARCH_LOG("jumping to %08x\n", (unsigned) BOOTER_ADDR);
SYS_ResetSystem(SYS_SHUTDOWN,0,0);
__lwp_thread_stopmultitasking((void (*)(void)) BOOTER_ADDR);
}