@@ -56,7 +56,16 @@ static const uint eeWaitCycles = 3072;
bool eeEventTestIsActive = false ;
u32 eeloadMain = 0 ;
u32 g_eeloadMain = 0 , g_eeloadExec = 0 , g_osdsys_str = 0 ;
/* I don't know how much space for args there is in the memory block used for args in full boot mode,
but in fast boot mode, the block we use can fit at least 16 argv pointers (varies with BIOS version).
The second EELOAD call during full boot has three built-in arguments ("EELOAD rom0:PS2LOGO <ELF>"),
meaning that only the first 13 game arguments supplied by the user can be added on and passed through.
In fast boot mode, 15 arguments can fit because the only call to EELOAD is "<ELF> <<args>>". */
const int kMaxArgs = 16 ;
uptr g_argPtrs[kMaxArgs ];
#define DEBUG_LAUNCHARG 0 // show lots of helpful console messages as the launch arguments are passed to the game
extern SysMainMemory& GetVmMemory ();
@@ -110,7 +119,7 @@ void cpuReset()
// is why I found out about this) --air
LastELF = L" "
eeloadMain = 0 ;
g_eeloadMain = 0 , g_eeloadExec = 0 , g_osdsys_str = 0 ;
}
void cpuShutdown ()
@@ -540,6 +549,49 @@ void __fastcall eeGameStarting()
}
}
// Count arguments, save their starting locations, and replace the space separators with null terminators so they're separate strings
int ParseArgumentString (u32 arg_block)
{
if (!arg_block)
return 0 ;
int argc = 1 ; // one arg is guaranteed at least
g_argPtrs[0 ] = arg_block; // first arg is right here
bool wasSpace = false ; // status of last char. scanned
int args_len = strlen ((char *)PSM (arg_block));
for (int i = 0 ; i < args_len; i++)
{
char curchar = *(char *)PSM (arg_block + i);
if (curchar == ' \0 '
break ; // should never reach this
bool isSpace = (curchar == ' '
if (isSpace)
memset (PSM (arg_block + i), 0 , 1 );
else if (wasSpace) // then we're at a new arg
{
if (argc < kMaxArgs )
{
g_argPtrs[argc] = arg_block + i;
argc++;
}
else
{
Console.WriteLn (" ParseArgumentString: Discarded additional arguments beyond the maximum of %d." kMaxArgs );
break ;
}
}
wasSpace = isSpace;
}
#if DEBUG_LAUNCHARG
// Check our args block
Console.WriteLn (" ParseArgumentString: Saving these strings:"
for (int a = 0 ; a < argc; a++)
Console.WriteLn (" %p -> '%s'." char *)PSM (g_argPtrs[a]));
#endif
return argc;
}
// Called from recompilers; __fastcall define is mandatory.
void __fastcall eeloadHook ()
{
@@ -554,9 +606,71 @@ void __fastcall eeloadHook()
int disctype = GetPS2ElfName (discelf);
std::string elfname;
if (cpuRegs.GPR .n .a0 .SD [0 ] >= 2 ) // argc >= 2
elfname = (char *)PSM (memRead32 (cpuRegs.GPR .n .a1 .UD [0 ] + 4 )); // argv[1]
int argc = cpuRegs.GPR .n .a0 .SD [0 ];
if (argc) // calls to EELOAD *after* the first one during the startup process will come here
{
#if DEBUG_LAUNCHARG
Console.WriteLn (" eeloadHook: EELOAD was called with %d arguments according to $a0 and %d according to vargs block:"
argc, memRead32 (cpuRegs.GPR .n .a1 .UD [0 ] - 4 ));
for (int a = 0 ; a < argc; a++)
Console.WriteLn (" argv[%d]: %p -> %p -> '%s'" GPR .n .a1 .UL [0 ] + (a * 4 ),
memRead32 (cpuRegs.GPR .n .a1 .UD [0 ] + (a * 4 )), (char *)PSM (memRead32 (cpuRegs.GPR .n .a1 .UD [0 ] + (a * 4 ))));
#endif
if (argc > 1 )
elfname = (char *)PSM (memRead32 (cpuRegs.GPR .n .a1 .UD [0 ] + 4 )); // argv[1] in OSDSYS's invocation "EELOAD <game ELF>"
// This code fires if the user chooses "full boot". First the Sony Computer Entertainment screen appears. This is the result
// of an EELOAD call that does not want to accept launch arguments (but we patch it to do so in eeloadHook2() in fast boot
// mode). Then EELOAD is called with the argument "rom0:PS2LOGO". At this point, we do not need any additional tricks
// because EELOAD is now ready to accept launch arguments. So in full-boot mode, we simply wait for PS2LOGO to be called,
// then we add the desired launch arguments. PS2LOGO passes those on to the game itself as it calls EELOAD a third time.
if (!g_Conf->CurrentGameArgs .empty () && !strcmp (elfname.c_str (), " rom0:PS2LOGO"
{
const char *argString = g_Conf->CurrentGameArgs .c_str ();
Console.WriteLn (" eeloadHook: Supplying launch argument(s) '%s' to module '%s'..." c_str ());
// Join all arguments by space characters so they can be processed as one string by ParseArgumentString(), then add the
// user's launch arguments onto the end
u32 arg_ptr = 0 ;
int arg_len = 0 ;
for (int a = 0 ; a < argc; a++)
{
arg_ptr = memRead32 (cpuRegs.GPR .n .a1 .UD [0 ] + (a * 4 ));
arg_len = strlen ((char *)PSM (arg_ptr));
memset (PSM (arg_ptr + arg_len), 0x20 , 1 );
}
strcpy ((char *)PSM (arg_ptr + arg_len + 1 ), g_Conf->CurrentGameArgs .c_str ());
u32 first_arg_ptr = memRead32 (cpuRegs.GPR .n .a1 .UD [0 ]);
#if DEBUG_LAUNCHARG
Console.WriteLn (" eeloadHook: arg block is '%s'." char *)PSM (first_arg_ptr));
#endif
argc = ParseArgumentString (first_arg_ptr);
// Write pointer to next slot in $a1
for (int a = 0 ; a < argc; a++)
memWrite32 (cpuRegs.GPR .n .a1 .UD [0 ] + (a * 4 ), g_argPtrs[a]);
cpuRegs.GPR .n .a0 .SD [0 ] = argc;
#if DEBUG_LAUNCHARG
// Check our work
Console.WriteLn (" eeloadHook: New arguments are:"
for (int a = 0 ; a < argc; a++)
Console.WriteLn (" argv[%d]: %p -> '%s'" memRead32 (cpuRegs.GPR .n .a1 .UD [0 ] + (a * 4 )),
(char *)PSM (memRead32 (cpuRegs.GPR .n .a1 .UD [0 ] + (a * 4 ))));
#endif
}
// else it's presumed that the invocation is "EELOAD <game ELF> <<launch args>>", coming from PS2LOGO, and we needn't do
// anything more
}
#if DEBUG_LAUNCHARG
// This code fires in full/fast boot mode when EELOAD is called the first/only time. When EELOAD is not given any arguments,
// it calls rom0:OSDSYS by default, which displays the Sony Computer Entertainment screen. OSDSYS then calls "EELOAD
// rom0:PS2LOGO" and we end up above.
else
Console.WriteLn (" eeloadHook: EELOAD was called with no arguments."
#endif
// If "fast boot" was chosen, then on EELOAD's first call we won't yet know what the game's ELF is. Find the name and write it
// into EELOAD's memory.
if (g_SkipBiosHack && elfname.empty ())
{
std::string elftoload;
@@ -571,44 +685,72 @@ void __fastcall eeloadHook()
elftoload = discelf.ToUTF8 ();
}
// When fast-booting, we insert the game's ELF name into EELOAD so that the game is called instead of the default call of
// "rom0:OSDSYS"; any launch arguments supplied by the user will be inserted into EELOAD later by eeloadHook2()
if (!elftoload.empty ())
{
#if 0
// FIXME: you'd think that changing argc and argv would work but no, need to work out why not
// This method would support adding command line arguments to homebrew (and is generally less hacky)
// It works if you hook on rom0:PS2LOGO loading, but not on the first call with no arguments
cpuRegs.GPR.n.a0.SD[0] = 2; // argc = 2
// argv[0] = "EELOAD"
strcpy((char*)PSM(cpuRegs.GPR.n.a1.UD[0] + 0x40), "EELOAD");
memWrite32(cpuRegs.GPR.n.a1.UD[0] + 0, cpuRegs.GPR.n.a1.UD[0] + 0x40);
// argv[1] = elftoload
strcpy((char*)PSM(cpuRegs.GPR.n.a1.UD[0] + 0x47), elftoload.c_str());
memWrite32(cpuRegs.GPR.n.a1.UD[0] + 4, cpuRegs.GPR.n.a1.UD[0] + 0x47);
memWrite32(cpuRegs.GPR.n.a1.UD[0] + 8, 0);
g_GameLoading = true;
return;
#else
// The strings are all 64-bit aligned. Why? I don't know, but they are
for (u32 osdsys_str = EELOAD_START; osdsys_str < EELOAD_START + EELOAD_SIZE; osdsys_str += 8 ) {
if (!strcmp ((char *)PSM (osdsys_str), " rom0:OSDSYS"
for (u32 osdsys_ptr = osdsys_str - 4 ; osdsys_ptr >= EELOAD_START; osdsys_ptr -= 4 ) {
if (memRead32 (osdsys_ptr) == osdsys_str) {
strcpy ((char *)PSM (cpuRegs.GPR .n .a1 .UD [0 ] + 0x40 ), elftoload.c_str ());
memWrite32 (osdsys_ptr, cpuRegs.GPR .n .a1 .UD [0 ] + 0x40 );
g_GameLoading = true ;
return ;
}
}
// Find and save location of default/fallback call "rom0:OSDSYS"; to be used later by eeloadHook2()
for (g_osdsys_str = EELOAD_START; g_osdsys_str < EELOAD_START + EELOAD_SIZE; g_osdsys_str += 8 ) // strings are 64-bit aligned
{
if (!strcmp ((char *)PSM (g_osdsys_str), " rom0:OSDSYS"
{
// Overwrite OSDSYS with game's ELF name
strcpy ((char *)PSM (g_osdsys_str), elftoload.c_str ());
g_GameLoading = true ;
return ;
}
}
#endif
}
}
if (!g_GameStarted && (disctype == 2 || disctype == 1 ) && elfname == discelf)
g_GameLoading = true ;
}
// Called from recompilers; __fastcall define is mandatory.
// Only called if g_SkipBiosHack is true
void __fastcall eeloadHook2 ()
{
if (g_Conf->CurrentGameArgs .empty ())
return ;
if (!g_osdsys_str)
{
Console.WriteLn (" eeloadHook2: Called before \" rom0:OSDSYS\" was found by eeloadHook()!"
return ;
}
const char *argString = g_Conf->CurrentGameArgs .c_str ();
Console.WriteLn (" eeloadHook2: Supplying launch argument(s) '%s' to ELF '%s'." char *)PSM (g_osdsys_str));
// Add args string after game's ELF name that was written over "rom0:OSDSYS" by eeloadHook(). In between the ELF name and args
// string we insert a space character so that ParseArgumentString() has one continuous string to process.
int game_len = strlen ((char *)PSM (g_osdsys_str));
memset (PSM (g_osdsys_str + game_len), 0x20 , 1 );
strcpy ((char *)PSM (g_osdsys_str + game_len + 1 ), g_Conf->CurrentGameArgs .c_str ());
#if DEBUG_LAUNCHARG
Console.WriteLn (" eeloadHook2: arg block is '%s'." char *)PSM (g_osdsys_str));
#endif
int argc = ParseArgumentString (g_osdsys_str);
// Back up 4 bytes from start of args block for every arg + 4 bytes for start of argv pointer block, write pointers
uptr block_start = g_osdsys_str - (argc * 4 );
for (int a = 0 ; a < argc; a++)
{
#if DEBUG_LAUNCHARG
Console.WriteLn (" eeloadHook2: Writing address %p to location %p." 4 ));
#endif
memWrite32 (block_start + (a * 4 ), g_argPtrs[a]);
}
// Save argc and argv as incoming arguments for EELOAD function which calls ExecPS2()
#if DEBUG_LAUNCHARG
Console.WriteLn (" eeloadHook2: Saving %d and %p in $a0 and $a1."
#endif
cpuRegs.GPR .n .a0 .SD [0 ] = argc;
cpuRegs.GPR .n .a1 .UD [0 ] = block_start;
}
inline bool isBranchOrJump (u32 addr)
{
u32 op = memRead32 (addr);
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