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Implement non-working data breakpoints feedback

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This commit is contained in:
BullyWiiPlaza 2017-12-23 12:07:11 +01:00
parent 9ce7af45d7
commit 6b23b17d11
2 changed files with 39 additions and 37 deletions
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76
src/tcpgecko/hardware_breakpoints.h
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@ -41,53 +41,55 @@ static inline int getDABRAddress(void *interruptedContext) {
}
unsigned char basicDABRBreakpointHandler(OSContext *context) {
log_print("Getting DABR address\n");
// log_print("Getting DABR address\n");
int address = getDABRAddress(context);
log_printf("Got DABR address: %08x\n", address);
// log_printf("Got DABR address: %08x\n", address);
if (OSIsAddressValid((const void *) address)) {
log_printf("Data breakpoint address: %x08\n", address);
// log_printf("Data breakpoint address: %x08\n", address);
} else {
log_printf("Data breakpoint invalid address: %x08\n", address);
// log_printf("Data breakpoint invalid address: %x08\n", address);
}
return 0;
}
static void SetDataBreakpoint(unsigned int address, bool read, bool write) {
log_print("Before installing...\n");
// log_print("Before installing...\n");
DataBreakpoints_Install();
log_print("After installing...\n");
// log_print("After installing...\n");
RegisterDataBreakpointHandler(basicDABRBreakpointHandler);
log_print("After registering...\n");
// log_print("After registering...\n");
unsigned int dabr = address & ~0b00000111; //GCC \o/
log_printf("DABR 1: %08x\n", dabr);
// log_printf("DABR 1: %08x\n", dabr);
dabr |= 0b00000100; //enable translation
log_printf("DABR 2: %08x\n", dabr);
// log_printf("DABR 2: %08x\n", dabr);
if (read) {
dabr |= 0b00000001; //break on read
log_printf("DABR 3: %08x\n", dabr);
// log_printf("DABR 3: %08x\n", dabr);
}
if (write) {
dabr |= 0b00000010; //break on write
log_printf("DABR 4: %08x\n", dabr);
// log_printf("DABR 4: %08x\n", dabr);
}
log_print("Setting DABR...\n");
// log_print("Setting DABR...\n");
SC0x2D_KernelSetDABR(dabr);
log_print("DABR set!\n");
// log_print("DABR set!\n");
}
static unsigned char DataBreakpoints_DSIHandler(void *ctx) {
log_print("DSI handler\n");
OSContext *context = (OSContext *) ctx;
// log_print("DSI handler\n");
/*OSContext *context = (OSContext *) ctx;
if (context->dsisr & DSISR_DABR_MATCH) {
log_print("Running BP handler\n");
return bHandler(context);
}
// log_print("Running BP handler\n");
if (bHandler) {
return bHandler(context);
}
}*/
log_print("DSI exception\n");
// log_print("DSI exception\n");
return dsi_exception_cb(ctx);
}
@ -144,14 +146,14 @@ static inline int getIABRMatch(void *interruptedContext) {
unsigned char breakPointHandler(void *interruptedContext);
void registerBreakPointHandler() {
log_print("Registering breakpoint handler...\n");
// log_print("Registering breakpoint handler...\n");
// TODO Not working, never called?
// OSSetExceptionCallback((u8) OS_EXCEPTION_DSI, &breakPointHandler);
// OSSetExceptionCallback((u8) OS_EXCEPTION_ISI, &breakPointHandler);
// OSSetExceptionCallback((u8) OS_EXCEPTION_PROGRAM, &breakPointHandler);
OSSetExceptionCallbackEx((u8) OS_EXCEPTION_MODE_GLOBAL_ALL_CORES, (u8) OS_EXCEPTION_PROGRAM, &breakPointHandler);
// __OSSetInterruptHandler((u8) OS_EXCEPTION_PROGRAM, &breakPointHandler);
log_print("Breakpoint handler(s) registered!\n");
// log_print("Breakpoint handler(s) registered!\n");
}
/*void forceDebuggerInitialized() {
@ -165,11 +167,11 @@ void forceDebuggerPresent() {
}*/
static inline void setupBreakpointSupport() {
/*log_print("Clear and enable...\n");
/*// log_print("Clear and enable...\n");
__OSClearAndEnableInterrupt();
log_print("Restore...\n");
// log_print("Restore...\n");
OSRestoreInterrupts();
log_print("Enable...\n");
// log_print("Enable...\n");
OSEnableInterrupts();
forceDebuggerPresent();
forceDebuggerInitialized();*/
@ -179,11 +181,11 @@ static inline void setupBreakpointSupport() {
void setDataBreakpoint(int address, bool read, bool write) {
setupBreakpointSupport();
log_print("Setting DABR...\n");
// log_print("Setting DABR...\n");
OSSetDABR(1, address, read, write);
log_print("DABR set\n");
// log_print("DABR set\n");
int enabled = OSIsInterruptEnabled();
log_printf("Interrupts enabled: %i\n", enabled);
// log_printf("Interrupts enabled: %i\n", enabled);
}
void setInstructionBreakpoint(unsigned int address) {
@ -191,36 +193,36 @@ void setInstructionBreakpoint(unsigned int address) {
// int returnedAddress;
log_print("Setting IABR #1...\n");
// log_print("Setting IABR #1...\n");
// OSSetIABR(1, address);
setIABR(address);
log_print("IABR set #1...\n");
// log_print("IABR set #1...\n");
/*
// TODO Causes crash
returnedAddress = getIABRAddress();
log_printf("IABR spr value: %08x\n", returnedAddress);
// log_printf("IABR spr value: %08x\n", returnedAddress);
log_print("Setting IABR #2...\n");
// log_print("Setting IABR #2...\n");
setIABR(address);
log_print("IABR set #2...\n");
// log_print("IABR set #2...\n");
returnedAddress = mfspr(IABR);
log_printf("IABR spr value: %08x\n", returnedAddress);*/
// log_printf("IABR spr value: %08x\n", returnedAddress);*/
}
unsigned char breakPointHandler(void *interruptedContext) {
// Check for data breakpoints
int dataAddress = getDABRAddress(interruptedContext);
if (OSIsAddressValid((const void *) dataAddress)) {
log_printf("Data breakpoint address: %x08\n", dataAddress);
// log_printf("Data breakpoint address: %x08\n", dataAddress);
} else {
log_printf("Data breakpoint invalid address: %x08\n", dataAddress);
// log_printf("Data breakpoint invalid address: %x08\n", dataAddress);
// Check for instruction breakpoints
int instructionAddress = getIABRMatch(interruptedContext);
if (OSIsAddressValid((const void *) instructionAddress)) {
log_printf("Instruction breakpoint address: %x08\n", dataAddress);
// log_printf("Instruction breakpoint address: %x08\n", dataAddress);
} else {
log_print("Instruction breakpoint failed!\n");
// log_print("Instruction breakpoint failed!\n");
}
}

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tcpgecko.elf
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