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https://github.com/PabloMK7/citra.git
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Fix bug with reading addresses and lengths
This commit is contained in:
polaris-
parent
b6422038b5
commit
bcea959910
1 changed files with 55 additions and 45 deletions
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@ -126,6 +126,22 @@ static u8 NibbleToHex(u8 n) {
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}
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}
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/**
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* Converts input hex string characters into an array of equivalent of u8 bytes.
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*
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* @param dest Pointer to buffer to store u8 bytes.
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* @param src Pointer to array of output hex string characters.
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* @param len Length of src array.
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*/
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static u32 HexToInt(u8* src, u32 len) {
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u32 output = 0;
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while (len-- > 0) {
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output = (output << 4) | HexCharToValue(src[0]);
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src++;
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}
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return output;
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}
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/**
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* Converts input array of u8 bytes into their equivalent hex string characters.
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*
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@ -133,7 +149,7 @@ static u8 NibbleToHex(u8 n) {
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* @param src Pointer to array of u8 bytes.
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* @param len Length of src array.
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*/
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static void MemToHex(u8* dest, u8* src, u32 len) {
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static void MemToGdbHex(u8* dest, u8* src, u32 len) {
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while (len-- > 0) {
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u8 tmp = *src++;
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*dest++ = NibbleToHex(tmp >> 4);
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@ -142,13 +158,13 @@ static void MemToHex(u8* dest, u8* src, u32 len) {
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}
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/**
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* Converts input hex string characters into an array of equivalent of u8 bytes.
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* Converts input gdb-formatted hex string characters into an array of equivalent of u8 bytes.
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*
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* @param dest Pointer to buffer to store u8 bytes.
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* @param src Pointer to array of output hex string characters.
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* @param len Length of src array.
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*/
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static void HexToMem(u8* dest, u8* src, u32 len) {
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static void GdbHexToMem(u8* dest, u8* src, u32 len) {
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while (len-- > 0) {
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*dest++ = (HexCharToValue(src[0]) << 4) | HexCharToValue(src[1]);
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src += 2;
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@ -156,11 +172,11 @@ static void HexToMem(u8* dest, u8* src, u32 len) {
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}
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/**
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* Convert a u32 into a hex string.
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* Convert a u32 into a gdb-formatted hex string.
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*
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* @param dest Pointer to buffer to store output hex string characters.
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*/
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static void IntToHex(u8* dest, u32 v) {
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static void IntToGdbHex(u8* dest, u32 v) {
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for (int i = 0; i < 8; i += 2) {
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dest[i + 1] = NibbleToHex(v >> (4 * i));
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dest[i] = NibbleToHex(v >> (4 * (i + 1)));
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@ -168,11 +184,11 @@ static void IntToHex(u8* dest, u32 v) {
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}
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/**
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* Convert a hex string into a u32.
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* Convert a gdb-formatted hex string into a u32.
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*
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* @param src Pointer to hex string.
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*/
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static u32 HexToInt(u8* src) {
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static u32 GdbHexToInt(u8* src) {
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u32 output = 0;
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for (int i = 0; i < 8; i += 2) {
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@ -455,14 +471,14 @@ static void ReadRegister() {
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}
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if (id >= R0_REGISTER && id <= R15_REGISTER) {
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IntToHex(reply, Core::g_app_core->GetReg(id));
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IntToGdbHex(reply, Core::g_app_core->GetReg(id));
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} else if (id == CSPR_REGISTER) {
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IntToHex(reply, Core::g_app_core->GetCPSR());
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IntToGdbHex(reply, Core::g_app_core->GetCPSR());
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} else if (id > CSPR_REGISTER && id < FPSCR_REGISTER) {
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IntToHex(reply, Core::g_app_core->GetVFPReg(id - CSPR_REGISTER - 1)); // VFP registers should start at 26, so one after CSPR_REGISTER
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IntToGdbHex(reply, Core::g_app_core->GetVFPReg(id - CSPR_REGISTER - 1)); // VFP registers should start at 26, so one after CSPR_REGISTER
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} else if (id == FPSCR_REGISTER) {
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IntToHex(reply, Core::g_app_core->GetVFPSystemReg(VFP_FPSCR)); // Get FPSCR
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IntToHex(reply + 8, 0);
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IntToGdbHex(reply, Core::g_app_core->GetVFPSystemReg(VFP_FPSCR)); // Get FPSCR
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IntToGdbHex(reply + 8, 0);
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} else {
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return SendReply("E01");
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}
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@ -478,20 +494,20 @@ static void ReadRegisters() {
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u8* bufptr = buffer;
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for (int i = 0, reg = 0; i <= MAX_REGISTERS; i++, reg++) {
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if (i <= R15_REGISTER) {
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IntToHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetReg(reg));
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IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetReg(reg));
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} else if (i == CSPR_REGISTER) {
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IntToHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetCPSR());
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IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetCPSR());
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} else if (i < CSPR_REGISTER) {
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IntToHex(bufptr + i * CHAR_BIT, 0);
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IntToHex(bufptr + (i + 1) * CHAR_BIT, 0);
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IntToGdbHex(bufptr + i * CHAR_BIT, 0);
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IntToGdbHex(bufptr + (i + 1) * CHAR_BIT, 0);
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i++; // These registers seem to be all 64bit instead of 32bit, so skip two instead of one
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reg++;
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} else if (i > CSPR_REGISTER && i < MAX_REGISTERS) {
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IntToHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetVFPReg(reg - CSPR_REGISTER - 1));
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IntToHex(bufptr + (i + 1) * CHAR_BIT, 0);
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IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetVFPReg(reg - CSPR_REGISTER - 1));
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IntToGdbHex(bufptr + (i + 1) * CHAR_BIT, 0);
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i++;
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} else if (i == MAX_REGISTERS) {
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IntToHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetVFPSystemReg(VFP_FPSCR));
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IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetVFPSystemReg(VFP_FPSCR));
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}
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}
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@ -510,13 +526,13 @@ static void WriteRegister() {
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}
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if (id >= R0_REGISTER && id <= R15_REGISTER) {
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Core::g_app_core->SetReg(id, HexToInt(buffer_ptr));
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Core::g_app_core->SetReg(id, GdbHexToInt(buffer_ptr));
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} else if (id == CSPR_REGISTER) {
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Core::g_app_core->SetCPSR(HexToInt(buffer_ptr));
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Core::g_app_core->SetCPSR(GdbHexToInt(buffer_ptr));
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} else if (id > CSPR_REGISTER && id < FPSCR_REGISTER) {
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Core::g_app_core->SetVFPReg(id - CSPR_REGISTER - 1, HexToInt(buffer_ptr));
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Core::g_app_core->SetVFPReg(id - CSPR_REGISTER - 1, GdbHexToInt(buffer_ptr));
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} else if (id == FPSCR_REGISTER) {
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Core::g_app_core->SetVFPSystemReg(VFP_FPSCR, HexToInt(buffer_ptr));
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Core::g_app_core->SetVFPSystemReg(VFP_FPSCR, GdbHexToInt(buffer_ptr));
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} else {
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return SendReply("E01");
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}
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@ -533,17 +549,17 @@ static void WriteRegisters() {
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for (int i = 0, reg = 0; i <= MAX_REGISTERS; i++, reg++) {
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if (i <= R15_REGISTER) {
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Core::g_app_core->SetReg(reg, HexToInt(buffer_ptr + i * CHAR_BIT));
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Core::g_app_core->SetReg(reg, GdbHexToInt(buffer_ptr + i * CHAR_BIT));
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} else if (i == CSPR_REGISTER) {
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Core::g_app_core->SetCPSR(HexToInt(buffer_ptr + i * CHAR_BIT));
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Core::g_app_core->SetCPSR(GdbHexToInt(buffer_ptr + i * CHAR_BIT));
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} else if (i < CSPR_REGISTER) {
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i++; // These registers seem to be all 64bit instead of 32bit, so skip two instead of one
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reg++;
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} else if (i > CSPR_REGISTER && i < MAX_REGISTERS) {
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Core::g_app_core->SetVFPReg(reg - CSPR_REGISTER - 1, HexToInt(buffer_ptr + i * CHAR_BIT));
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Core::g_app_core->SetVFPReg(reg - CSPR_REGISTER - 1, GdbHexToInt(buffer_ptr + i * CHAR_BIT));
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i++; // Skip padding
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} else if (i == MAX_REGISTERS) {
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Core::g_app_core->SetVFPSystemReg(VFP_FPSCR, HexToInt(buffer_ptr + i * CHAR_BIT));
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Core::g_app_core->SetVFPSystemReg(VFP_FPSCR, GdbHexToInt(buffer_ptr + i * CHAR_BIT));
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}
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}
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@ -556,12 +572,12 @@ static void ReadMemory() {
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auto start_offset = command_buffer+1;
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auto addr_pos = std::find(start_offset, command_buffer+command_length, ',');
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PAddr addr = 0;
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HexToMem((u8*)&addr, start_offset, (addr_pos - start_offset) / 2);
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PAddr addr = HexToInt(start_offset, addr_pos - start_offset);
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start_offset = addr_pos+1;
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u32 len = 0;
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HexToMem((u8*)&len, start_offset, ((command_buffer + command_length) - start_offset) / 2);
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u32 len = HexToInt(start_offset, (command_buffer + command_length) - start_offset);
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LOG_DEBUG(Debug_GDBStub, "gdb: addr: %08x len: %08x\n", addr, len);
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if (len * 2 > sizeof(reply)) {
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SendReply("E01");
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@ -572,7 +588,7 @@ static void ReadMemory() {
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return SendReply("E0");
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}
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MemToHex(reply, data, len);
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MemToGdbHex(reply, data, len);
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reply[len * 2] = '\0';
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SendReply(reinterpret_cast<char*>(reply));
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}
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@ -581,20 +597,18 @@ static void ReadMemory() {
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static void WriteMemory() {
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auto start_offset = command_buffer+1;
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auto addr_pos = std::find(start_offset, command_buffer+command_length, ',');
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PAddr addr = 0;
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HexToMem((u8*)&addr, start_offset, (addr_pos - start_offset) / 2);
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PAddr addr = HexToInt(start_offset, addr_pos - start_offset);
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start_offset = addr_pos+1;
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auto len_pos = std::find(start_offset, command_buffer+command_length, ':');
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u32 len = 0;
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HexToMem((u8*)&len, start_offset, (len_pos - start_offset) / 2);
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u32 len = HexToInt(start_offset, len_pos - start_offset);
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u8* dst = Memory::GetPointer(addr);
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if (!dst) {
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return SendReply("E00");
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}
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HexToMem(dst, len_pos + 1, len);
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GdbHexToMem(dst, len_pos + 1, len);
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SendReply("OK");
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}
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@ -677,12 +691,10 @@ static void AddBreakpoint() {
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auto start_offset = command_buffer+3;
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auto addr_pos = std::find(start_offset, command_buffer+command_length, ',');
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PAddr addr = 0;
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HexToMem((u8*)&addr, start_offset, (addr_pos - start_offset) / 2);
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PAddr addr = HexToInt(start_offset, addr_pos - start_offset);
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start_offset = addr_pos+1;
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u32 len = 0;
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HexToMem((u8*)&len, start_offset, ((command_buffer + command_length) - start_offset) / 2);
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u32 len = HexToInt(start_offset, (command_buffer + command_length) - start_offset);
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if (type == BreakpointType::Access) {
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// Access is made up of Read and Write types, so add both breakpoints
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@ -727,12 +739,10 @@ static void RemoveBreakpoint() {
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auto start_offset = command_buffer+3;
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auto addr_pos = std::find(start_offset, command_buffer+command_length, ',');
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PAddr addr = 0;
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HexToMem((u8*)&addr, start_offset, (addr_pos - start_offset) / 2);
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PAddr addr = HexToInt(start_offset, addr_pos - start_offset);
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start_offset = addr_pos+1;
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u32 len = 0;
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HexToMem((u8*)&len, start_offset, ((command_buffer + command_length) - start_offset) / 2);
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u32 len = HexToInt(start_offset, (command_buffer + command_length) - start_offset);
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if (type == BreakpointType::Access) {
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// Access is made up of Read and Write types, so add both breakpoints
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