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/**
* PSXSDK
*
* RunEXE functionality
*/
#include <psx.h>
#include <stdio.h>
#include <string.h>
#include <runexe.h>
// Include runexe stage2 position independent code
extern void PSX_RunExeStage2();
extern void PSX_RunExeStage2_END();
static void *runExeBuffer;
int PSX_RunExe(void *exeBuffer)
{
//unsigned char *exe = exeBuffer;
unsigned int *exe = exeBuffer;
// Size of position indipendent code
int sz = PSX_RunExeStage2_END -
PSX_RunExeStage2;
if(!(PSX_GetInitFlags() & PSX_INIT_SAVESTATE))
{
printf("RunExe error: State was not saved!\n");
return 0;
}
if(((unsigned int)exeBuffer & 3))
{
printf("RunExe: Alignment violation.\n");
printf("Specified buffer must have an address which is a multiplier of 4.\n");
return 0;
}
// Check magic string
if(strcmp(exeBuffer, "PS-X EXE") != 0)
return 0; // Return failure if magic string couldn't be found
runExeBuffer = exeBuffer;
printf("PSXSDK RunExe Debug Information\n");
printf("t_addr = %08x\n", exe[6]);
printf("t_size = %08x\n", exe[7]);
printf("d_addr = %08x\n", exe[8]);
printf("d_size = %08x\n", exe[9]);
printf("b_addr = %08x\n", exe[10]);
printf("b_size = %08x\n", exe[11]);
printf("s_addr = %08x\n", exe[12]);
printf("s_size = %08x\n", exe[13]);
printf("OK..! Farewell.\n");
// Deinitialize the PSXSDK library
PSX_DeInit();
// Copy the position independent stage2 code in high memory
memcpy((void*)0x801fef00, PSX_RunExeStage2, sz);
// Stack is unusable now! Do not do anything else except calling the stage2 code.
// Jump to the stage2 code without using the stack..
__asm__("la $a0, runExeBuffer");
__asm__("nop");
__asm__("lw $a0, 0($a0)");
__asm__("j 0x801fef00");
__asm__("nop");
// This is never reached but keep the compiler happy
return 0;
}
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