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Fix execute assembly command

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This commit is contained in:
BullyWiiPlaza 2017-03-29 16:50:33 +02:00
parent e3a7118428
commit a77d0713b2
2 changed files with 39 additions and 15 deletions
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54
src/pygecko.c
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@ -50,7 +50,7 @@ struct pygecko_bss_t {
#define COMMAND_RPC 0x70
#define COMMAND_GET_SYMBOL 0x71
#define COMMAND_MEMORY_SEARCH 0x73
#define COMMAND_SYS_CALL 0x80
// #define COMMAND_SYSTEM_CALL 0x80
#define COMMAND_EXECUTE_ASSEMBLY 0x81
#define COMMAND_SERVER_VERSION 0x99
#define COMMAND_OS_VERSION 0x9A
@ -63,7 +63,7 @@ struct pygecko_bss_t {
#define FS_BUFFER_SIZE 0x1000
#define DATA_BUFFER_SIZE 0x5000
#define DISASSEMBLER_BUFFER_SIZE 0x1024
#define ASSEMBLY_BUFFER_SIZE 0x190
#define WRITE_SCREEN_MESSAGE_BUFFER_SIZE 100
#define SERVER_VERSION "02/25/2017"
#define ONLY_ZEROS_READ 0xB0
#define NON_ZEROS_READ 0xBD
@ -131,6 +131,24 @@ strm,
int flush
));
/*struct breakpoint {
u32 address;
u32 instruction;
};
// 10 general breakpoints + 2 step breakpoints
breakpoint breakpoints[12];
breakpoint *getBreakpoint(u32 address, int size) {
breakpoint *breakpointsList = breakpoints;
for (int breakpointIndex = 0; breakpointIndex < size; breakpointIndex++) {
if (breakpointsList[breakpointIndex].address == address) {
return &breakpointsList[breakpointIndex];
}
}
return 0;
}*/
unsigned char *memcpy_buffer[DATA_BUFFER_SIZE];
void pygecko_memcpy(unsigned char *destinationBuffer, unsigned char *sourceBuffer, unsigned int length) {
@ -243,7 +261,8 @@ static int sendbyte(struct pygecko_bss_t *bss, int sock, unsigned char byte) {
return sendwait(bss, sock, buffer, 1);
}
void performSystemCall(int value) {
/*void performSystemCall(int value) {
// TODO Exception DSI?
asm(
"li 0, %0\n"
"sc\n"
@ -252,7 +271,7 @@ void performSystemCall(int value) {
:"r"(value) // Input
:"0" // Overwritten register
);
}
}*/
void writeScreen(char message[100], int secondsDelay) {
// TODO Does nothing then crashes (in games)?
@ -1054,11 +1073,11 @@ static int rungecko(struct pygecko_bss_t *bss, int clientfd) {
break;
}
case COMMAND_WRITE_SCREEN: {
char message[100];
char message[WRITE_SCREEN_MESSAGE_BUFFER_SIZE];
ret = recvwait(bss, clientfd, buffer, 4);
ASSERT_FUNCTION_SUCCEEDED(ret, "recvwait (write screen seconds)")
int seconds = ((int *) buffer)[0];
receiveString(bss, clientfd, message, 100);
receiveString(bss, clientfd, message, WRITE_SCREEN_MESSAGE_BUFFER_SIZE);
writeScreen(message, seconds);
break;
@ -1215,27 +1234,32 @@ static int rungecko(struct pygecko_bss_t *bss, int clientfd) {
break;
}
case COMMAND_SYS_CALL: {
/*case COMMAND_SYSTEM_CALL: {
ret = recvwait(bss, clientfd, buffer, 4);
ASSERT_FUNCTION_SUCCEEDED(ret, "recvwait (syscall)")
ASSERT_FUNCTION_SUCCEEDED(ret, "recvwait (system call)")
int value = ((int *) buffer)[0];
// TODO Exception DSI
performSystemCall(value);
break;
}
}*/
case COMMAND_EXECUTE_ASSEMBLY: {
char assemblyBuffer[ASSEMBLY_BUFFER_SIZE] = {0};
// Receive the assembly
receiveString(bss, clientfd, assemblyBuffer, ASSEMBLY_BUFFER_SIZE);
receiveString(bss, clientfd, (char *) buffer, DATA_BUFFER_SIZE);
// Execute the assembly TODO Exception ISI
void (*function)() = (void *) assemblyBuffer;
// Write the assembly to an executable code region
int destinationAddress = 0x10000000 - DATA_BUFFER_SIZE;
pygecko_memcpy((unsigned char *) destinationAddress, buffer, DATA_BUFFER_SIZE);
// Execute the assembly from there
void (*function)() = (void (*)()) destinationAddress;
function();
// Clear the memory contents again
memset((void *) buffer, 0, DATA_BUFFER_SIZE);
pygecko_memcpy((unsigned char *) destinationAddress, buffer, DATA_BUFFER_SIZE);
break;
}
case COMMAND_SERVER_VERSION: {

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tcpgecko.elf
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