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Merge pull request #1644 from polaris-/gdb-fixes
Adopted WinterMute's gdbstub changes
This commit is contained in:
bunnei
commit
a4c5d8fd50
2 changed files with 107 additions and 28 deletions
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@ -36,25 +36,43 @@
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static void PrintHelp()
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{
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std::cout << "Usage: citra <filename>" << std::endl;
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std::cout << "Usage: citra [options] <filename>" << std::endl;
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std::cout << "--help, -h Display this information" << std::endl;
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std::cout << "--gdbport, -g number Enable gdb stub on port number" << std::endl;
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}
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/// Application entry point
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int main(int argc, char **argv) {
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Config config;
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int option_index = 0;
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bool use_gdbstub = Settings::values.use_gdbstub;
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u32 gdb_port = static_cast<u32>(Settings::values.gdbstub_port);
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char *endarg;
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std::string boot_filename;
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static struct option long_options[] = {
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{ "help", no_argument, 0, 'h' },
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{ "gdbport", required_argument, 0, 'g' },
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{ 0, 0, 0, 0 }
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};
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while (optind < argc) {
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char arg = getopt_long(argc, argv, ":h", long_options, &option_index);
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char arg = getopt_long(argc, argv, ":hg:", long_options, &option_index);
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if (arg != -1) {
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switch (arg) {
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case 'h':
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PrintHelp();
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return 0;
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case 'g':
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errno = 0;
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gdb_port = strtoul(optarg, &endarg, 0);
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use_gdbstub = true;
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if (endarg == optarg) errno = EINVAL;
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if (errno != 0) {
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perror("--gdbport");
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exit(1);
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}
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break;
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}
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} else {
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boot_filename = argv[optind];
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@ -73,11 +91,10 @@ int main(int argc, char **argv) {
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return -1;
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}
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Config config;
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log_filter.ParseFilterString(Settings::values.log_filter);
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GDBStub::ToggleServer(Settings::values.use_gdbstub);
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GDBStub::SetServerPort(static_cast<u32>(Settings::values.gdbstub_port));
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GDBStub::ToggleServer(use_gdbstub);
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GDBStub::SetServerPort(gdb_port);
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std::unique_ptr<EmuWindow_SDL2> emu_window = std::make_unique<EmuWindow_SDL2>();
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@ -60,6 +60,59 @@ const u32 R15_REGISTER = 15;
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const u32 CPSR_REGISTER = 25;
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const u32 FPSCR_REGISTER = 58;
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// For sample XML files see the GDB source /gdb/features
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// GDB also wants the l character at the start
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// This XML defines what the registers are for this specific ARM device
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static const char* target_xml =
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R"(l<?xml version="1.0"?>
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<!DOCTYPE target SYSTEM "gdb-target.dtd">
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<target version="1.0">
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<feature name="org.gnu.gdb.arm.core">
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<reg name="r0" bitsize="32"/>
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<reg name="r1" bitsize="32"/>
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<reg name="r2" bitsize="32"/>
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<reg name="r3" bitsize="32"/>
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<reg name="r4" bitsize="32"/>
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<reg name="r5" bitsize="32"/>
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<reg name="r6" bitsize="32"/>
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<reg name="r7" bitsize="32"/>
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<reg name="r8" bitsize="32"/>
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<reg name="r9" bitsize="32"/>
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<reg name="r10" bitsize="32"/>
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<reg name="r11" bitsize="32"/>
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<reg name="r12" bitsize="32"/>
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<reg name="sp" bitsize="32" type="data_ptr"/>
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<reg name="lr" bitsize="32"/>
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<reg name="pc" bitsize="32" type="code_ptr"/>
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<!-- The CPSR is register 25, rather than register 16, because
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the FPA registers historically were placed between the PC
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and the CPSR in the "g" packet. -->
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<reg name="cpsr" bitsize="32" regnum="25"/>
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</feature>
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<feature name="org.gnu.gdb.arm.vfp">
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<reg name="d0" bitsize="64" type="float"/>
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<reg name="d1" bitsize="64" type="float"/>
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<reg name="d2" bitsize="64" type="float"/>
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<reg name="d3" bitsize="64" type="float"/>
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<reg name="d4" bitsize="64" type="float"/>
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<reg name="d5" bitsize="64" type="float"/>
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<reg name="d6" bitsize="64" type="float"/>
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<reg name="d7" bitsize="64" type="float"/>
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<reg name="d8" bitsize="64" type="float"/>
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<reg name="d9" bitsize="64" type="float"/>
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<reg name="d10" bitsize="64" type="float"/>
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<reg name="d11" bitsize="64" type="float"/>
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<reg name="d12" bitsize="64" type="float"/>
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<reg name="d13" bitsize="64" type="float"/>
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<reg name="d14" bitsize="64" type="float"/>
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<reg name="d15" bitsize="64" type="float"/>
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<reg name="fpscr" bitsize="32" type="int" group="float"/>
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</feature>
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</target>
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)";
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namespace GDBStub {
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static int gdbserver_socket = -1;
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@ -211,7 +264,7 @@ static u8 ReadByte() {
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}
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/// Calculate the checksum of the current command buffer.
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static u8 CalculateChecksum(u8 *buffer, u32 length) {
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static u8 CalculateChecksum(u8* buffer, u32 length) {
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return static_cast<u8>(std::accumulate(buffer, buffer + length, 0, std::plus<u8>()));
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}
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@ -353,8 +406,15 @@ static void SendReply(const char* reply) {
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static void HandleQuery() {
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LOG_DEBUG(Debug_GDBStub, "gdb: query '%s'\n", command_buffer + 1);
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if (!strcmp(reinterpret_cast<const char*>(command_buffer + 1), "TStatus")) {
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const char* query = reinterpret_cast<const char*>(command_buffer + 1);
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if (strcmp(query, "TStatus") == 0 ) {
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SendReply("T0");
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} else if (strncmp(query, "Supported:", strlen("Supported:")) == 0) {
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// PacketSize needs to be large enough for target xml
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SendReply("PacketSize=800;qXfer:features:read+");
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} else if (strncmp(query, "Xfer:features:read:target.xml:", strlen("Xfer:features:read:target.xml:")) == 0) {
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SendReply(target_xml);
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} else {
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SendReply("");
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}
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@ -491,29 +551,25 @@ static void ReadRegisters() {
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memset(buffer, 0, sizeof(buffer));
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u8* bufptr = buffer;
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for (int i = 0, reg = 0; reg <= FPSCR_REGISTER; i++, reg++) {
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if (reg <= R15_REGISTER) {
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IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetReg(reg));
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} else if (reg == CPSR_REGISTER) {
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IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetCPSR());
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} else if (reg == CPSR_REGISTER - 1) {
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// Dummy FPA register, ignore
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IntToGdbHex(bufptr + i * CHAR_BIT, 0);
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} else if (reg < CPSR_REGISTER) {
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// Dummy FPA registers, ignore
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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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IntToGdbHex(bufptr + (i + 2) * CHAR_BIT, 0);
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i += 2;
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} else if (reg > CPSR_REGISTER && reg < FPSCR_REGISTER) {
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IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetVFPReg(reg - CPSR_REGISTER - 1));
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IntToGdbHex(bufptr + (i + 1) * CHAR_BIT, 0);
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i++;
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} else if (reg == FPSCR_REGISTER) {
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IntToGdbHex(bufptr + i * CHAR_BIT, Core::g_app_core->GetVFPSystemReg(VFP_FPSCR));
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}
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for (int reg = 0; reg <= R15_REGISTER; reg++) {
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IntToGdbHex(bufptr + reg * CHAR_BIT, Core::g_app_core->GetReg(reg));
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}
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bufptr += (16 * CHAR_BIT);
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IntToGdbHex(bufptr, Core::g_app_core->GetCPSR());
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bufptr += CHAR_BIT;
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for (int reg = 0; reg <= 31; reg++) {
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IntToGdbHex(bufptr + reg * CHAR_BIT, Core::g_app_core->GetVFPReg(reg));
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}
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bufptr += (32 * CHAR_BIT);
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IntToGdbHex(bufptr, Core::g_app_core->GetVFPSystemReg(VFP_FPSCR));
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SendReply(reinterpret_cast<char*>(buffer));
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}
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@ -885,6 +941,12 @@ void Init(u16 port) {
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LOG_ERROR(Debug_GDBStub, "Failed to create gdb socket");
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}
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// Set socket to SO_REUSEADDR so it can always bind on the same port
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int reuse_enabled = 1;
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if (setsockopt(tmpsock, SOL_SOCKET, SO_REUSEADDR, (const char*)&reuse_enabled, sizeof(reuse_enabled)) < 0) {
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LOG_ERROR(Debug_GDBStub, "Failed to set gdb socket option");
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}
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const sockaddr* server_addr = reinterpret_cast<const sockaddr*>(&saddr_server);
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socklen_t server_addrlen = sizeof(saddr_server);
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if (bind(tmpsock, server_addr, server_addrlen) < 0) {
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