/* ICE interface for the NEC V850 for GDB, the GNU debugger. Copyright 1996, 2000 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "defs.h" #include "gdb_string.h" #include "frame.h" #include "symtab.h" #include "inferior.h" #include "breakpoint.h" #include "symfile.h" #include "target.h" #include "objfiles.h" #include "gdbcore.h" #include "value.h" #include "command.h" #include #include /* for WM_USER */ extern unsigned long int strtoul (const char *nptr, char **endptr, int base); /* Local data definitions */ struct MessageIO { int size; /* length of input or output in bytes */ char *buf; /* buffer having the input/output information */ }; /* Prototypes for functions located in other files */ extern void break_command PARAMS ((char *, int)); extern void stepi_command PARAMS ((char *, int)); extern void nexti_command PARAMS ((char *, int)); extern void continue_command PARAMS ((char *, int)); extern int (*ui_loop_hook) PARAMS ((int)); /* Prototypes for local functions */ static int init_hidden_window PARAMS ((void)); static LRESULT CALLBACK v850ice_wndproc PARAMS ((HWND, UINT, WPARAM, LPARAM)); static void v850ice_files_info PARAMS ((struct target_ops * ignore)); static int v850ice_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, int should_write, struct target_ops * target)); static void v850ice_prepare_to_store PARAMS ((void)); static void v850ice_fetch_registers PARAMS ((int regno)); static void v850ice_resume PARAMS ((int pid, int step, enum target_signal siggnal)); static void v850ice_open PARAMS ((char *name, int from_tty)); static void v850ice_close PARAMS ((int quitting)); static void v850ice_stop PARAMS ((void)); static void v850ice_store_registers PARAMS ((int regno)); static void v850ice_mourn PARAMS ((void)); static int v850ice_wait PARAMS ((int pid, struct target_waitstatus * status)); static void v850ice_kill PARAMS ((void)); static void v850ice_detach PARAMS ((char *args, int from_tty)); static int v850ice_insert_breakpoint PARAMS ((CORE_ADDR, char *)); static int v850ice_remove_breakpoint PARAMS ((CORE_ADDR, char *)); static void v850ice_command PARAMS ((char *, int)); static int ice_disassemble PARAMS ((unsigned long, int, char *)); static int ice_lookup_addr PARAMS ((unsigned long *, char *, char *)); static int ice_lookup_symbol PARAMS ((unsigned long, char *)); static void ice_SimulateDisassemble PARAMS ((char *, int)); static void ice_SimulateAddrLookup PARAMS ((char *, int)); static void ice_Simulate_SymLookup PARAMS ((char *, int)); static void ice_fputs (const char *, struct ui_file *); static int ice_file PARAMS ((char *)); static int ice_cont PARAMS ((char *)); static int ice_stepi PARAMS ((char *)); static int ice_nexti PARAMS ((char *)); static void togdb_force_update PARAMS ((void)); static void do_gdb (char *, char *, void (*func) PARAMS ((char *, int)), int); /* Globals */ static HWND hidden_hwnd; /* HWND for messages */ long (__stdcall * ExeAppReq) PARAMS ((char *, long, char *, struct MessageIO *)); long (__stdcall * RegisterClient) PARAMS ((HWND)); long (__stdcall * UnregisterClient) PARAMS ((void)); /* Globals local to this file only */ static int ice_open = 0; /* Is ICE open? */ static char *v850_CB_Result; /* special char array for saving 'callback' results */ static int SimulateCallback; /* simulate a callback event */ #define MAX_BLOCK_SIZE 64*1024 /* Cannot transfer memory in blocks bigger than this */ /* MDI/ICE Message IDs */ #define GSINGLESTEP 0x200 /* single-step target */ #define GRESUME 0x201 /* resume target */ #define GREADREG 0x202 /* read a register */ #define GWRITEREG 0x203 /* write a register */ #define GWRITEBLOCK 0x204 /* write a block of memory */ #define GREADBLOCK 0x205 /* read a block of memory */ #define GSETBREAK 0x206 /* set a breakpoint */ #define GREMOVEBREAK 0x207 /* remove a breakpoint */ #define GHALT 0x208 /* ??? */ #define GCHECKSTATUS 0x209 /* check status of ICE */ #define GMDIREPLY 0x210 /* Reply for previous query - NOT USED */ #define GDOWNLOAD 0x211 /* something for MDI */ #define GCOMMAND 0x212 /* execute command in ice */ #define GLOADFILENAME 0x213 /* retrieve load filename */ #define GWRITEMEM 0x214 /* write word, half-word, or byte */ /* GCHECKSTATUS return codes: */ #define ICE_Idle 0x00 #define ICE_Breakpoint 0x01 /* hit a breakpoint */ #define ICE_Stepped 0x02 /* have stepped */ #define ICE_Exception 0x03 /* have exception */ #define ICE_Halted 0x04 /* hit a user halt */ #define ICE_Exited 0x05 /* called exit */ #define ICE_Terminated 0x06 /* user terminated */ #define ICE_Running 0x07 #define ICE_Unknown 0x99 /* Windows messages */ #define WM_STATE_CHANGE WM_USER+101 #define WM_SYM_TO_ADDR WM_USER+102 #define WM_ADDR_TO_SYM WM_USER+103 #define WM_DISASSEMBLY WM_USER+104 #define WM_SOURCE WM_USER+105 /* STATE_CHANGE codes */ #define STATE_CHANGE_REGS 1 /* Register(s) changed */ #define STATE_CHANGE_LOAD 2 /* HW reset */ #define STATE_CHANGE_RESET 3 /* Load new file */ #define STATE_CHANGE_CONT 4 /* Run target */ #define STATE_CHANGE_STOP 5 /* Stop target */ #define STATE_CHANGE_STEPI 6 /* Stepi target */ #define STATE_CHANGE_NEXTI 7 /* Nexti target */ static struct target_ops v850ice_ops; /* Forward decl */ /* This function creates a hidden window */ static int init_hidden_window () { WNDCLASS class; if (hidden_hwnd != NULL) return 1; class.style = 0; class.cbClsExtra = 0; class.cbWndExtra = 0; class.hInstance = GetModuleHandle (0); class.hbrBackground = NULL; class.lpszMenuName = NULL; class.lpszClassName = "gdb_v850ice"; class.lpfnWndProc = v850ice_wndproc; class.hIcon = NULL; class.hCursor = NULL; if (!RegisterClass (&class)) return 0; hidden_hwnd = CreateWindow ("gdb_v850ice", "gdb_v850ice", WS_TILED, 0, 0, 0, 0, NULL, NULL, class.hInstance, NULL); if (hidden_hwnd == NULL) { char buf[200]; DWORD err; err = GetLastError (); FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, 0, buf, 200, NULL); printf_unfiltered ("Could not create window: %s", buf); return 0; } return 1; } /* This function is installed as the message handler for the hidden window which QBox will use to communicate with gdb. It recognize and acts on the following messages: WM_SYM_TO_ADDR \ WM_ADDR_TO_SYM | Not implemented at NEC's request WM_DISASSEMBLY / WM_STATE_CHANGE - tells us that a state change has occured in the ICE */ static LRESULT CALLBACK v850ice_wndproc (hwnd, message, wParam, lParam) HWND hwnd; UINT message; WPARAM wParam; LPARAM lParam; { LRESULT result = FALSE; switch (message) { case WM_SYM_TO_ADDR: MessageBox (0, "Symbol resolution\nNot implemented", "GDB", MB_OK); break; case WM_ADDR_TO_SYM: MessageBox (0, "Address resolution\nNot implemented", "GDB", MB_OK); break; case WM_SOURCE: break; case WM_STATE_CHANGE: switch (wParam) { case STATE_CHANGE_LOAD: { struct MessageIO iob; char buf[128]; iob.buf = buf; iob.size = 128; /* Load in a new file... Need filename */ ExeAppReq ("GDB", GLOADFILENAME, NULL, &iob); if (!catch_errors ((catch_errors_ftype *) ice_file, iob.buf, "", RETURN_MASK_ALL)) printf_unfiltered ("load errored\n"); } break; case STATE_CHANGE_RESET: registers_changed (); flush_cached_frames (); togdb_force_update (); result = TRUE; break; case STATE_CHANGE_REGS: registers_changed (); togdb_force_update (); result = TRUE; break; case STATE_CHANGE_CONT: if (!catch_errors ((catch_errors_ftype *) ice_cont, NULL, "", RETURN_MASK_ALL)) printf_unfiltered ("continue errored\n"); result = TRUE; break; case STATE_CHANGE_STEPI: if (!catch_errors ((catch_errors_ftype *) ice_stepi, (PTR) (int) lParam, "", RETURN_MASK_ALL)) printf_unfiltered ("stepi errored\n"); result = TRUE; break; case STATE_CHANGE_NEXTI: if (!catch_errors ((catch_errors_ftype *) ice_nexti, (PTR) (int) lParam, "", RETURN_MASK_ALL)) printf_unfiltered ("nexti errored\n"); result = TRUE; break; } } if (result == FALSE) return DefWindowProc (hwnd, message, wParam, lParam); return FALSE; } /* Code for opening a connection to the ICE. */ static void v850ice_open (name, from_tty) char *name; int from_tty; { HINSTANCE handle; if (name) error ("Too many arguments."); target_preopen (from_tty); unpush_target (&v850ice_ops); if (from_tty) puts_filtered ("V850ice debugging\n"); push_target (&v850ice_ops); /* Switch to using v850ice target now */ target_terminal_init (); /* Initialize everything necessary to facilitate communication between QBox, gdb, and the DLLs which control the ICE */ if (ExeAppReq == NULL) { handle = LoadLibrary ("necmsg.dll"); if (handle == NULL) error ("Cannot load necmsg.dll"); ExeAppReq = (long (*)PARAMS ((char *, long, char *, struct MessageIO *))) GetProcAddress (handle, "ExeAppReq"); RegisterClient = (long (*)PARAMS ((HWND))) GetProcAddress (handle, "RegisterClient"); UnregisterClient = (long (*)PARAMS ((void))) GetProcAddress (handle, "UnregisterClient"); if (ExeAppReq == NULL || RegisterClient == NULL || UnregisterClient == NULL) error ("Could not find requisite functions in necmsg.dll."); if (!init_hidden_window ()) error ("could not initialize message handling"); } /* Tell the DLL we are here */ RegisterClient (hidden_hwnd); ice_open = 1; /* Without this, some commands which require an active target (such as kill) won't work. This variable serves (at least) double duty as both the pid of the target process (if it has such), and as a flag indicating that a target is active. These functions should be split out into seperate variables, especially since GDB will someday have a notion of debugging several processes. */ inferior_pid = 42000; start_remote (); return; } /* Clean up connection to a remote debugger. */ /* ARGSUSED */ static void v850ice_close (quitting) int quitting; { if (ice_open) { UnregisterClient (); ice_open = 0; inferior_pid = 0; } } /* Stop the process on the ice. */ static void v850ice_stop () { /* This is silly, but it works... */ v850ice_command ("stop", 0); } static void v850ice_detach (args, from_tty) char *args; int from_tty; { if (args) error ("Argument given to \"detach\" when remotely debugging."); pop_target (); if (from_tty) puts_filtered ("Ending v850ice debugging.\n"); } /* Tell the remote machine to resume. */ static void v850ice_resume (pid, step, siggnal) int pid, step; enum target_signal siggnal; { long retval; char buf[256]; struct MessageIO iob; iob.size = 0; iob.buf = buf; if (step) retval = ExeAppReq ("GDB", GSINGLESTEP, "step", &iob); else retval = ExeAppReq ("GDB", GRESUME, "run", &iob); if (retval) error ("ExeAppReq (step = %d) returned %d", step, retval); } /* Wait until the remote machine stops, then return, storing status in STATUS just as `wait' would. Returns "pid" (though it's not clear what, if anything, that means in the case of this target). */ static int v850ice_wait (pid, status) int pid; struct target_waitstatus *status; { long v850_status; char buf[256]; struct MessageIO iob; int done = 0; int count = 0; iob.size = 0; iob.buf = buf; do { if (count++ % 100000) { ui_loop_hook (0); count = 0; } v850_status = ExeAppReq ("GDB", GCHECKSTATUS, NULL, &iob); switch (v850_status) { case ICE_Idle: case ICE_Breakpoint: case ICE_Stepped: case ICE_Halted: status->kind = TARGET_WAITKIND_STOPPED; status->value.sig = TARGET_SIGNAL_TRAP; done = 1; break; case ICE_Exception: status->kind = TARGET_WAITKIND_SIGNALLED; status->value.sig = TARGET_SIGNAL_SEGV; done = 1; break; case ICE_Exited: status->kind = TARGET_WAITKIND_EXITED; status->value.integer = 0; done = 1; break; case ICE_Terminated: status->kind = TARGET_WAITKIND_SIGNALLED; status->value.sig = TARGET_SIGNAL_KILL; done = 1; break; default: break; } } while (!done); return inferior_pid; } static int convert_register (regno, buf) int regno; char *buf; { if (regno <= 31) sprintf (buf, "r%d", regno); else if (REGISTER_NAME (regno)[0] == 's' && REGISTER_NAME (regno)[1] == 'r') return 0; else sprintf (buf, "%s", REGISTER_NAME (regno)); return 1; } /* Read the remote registers into the block REGS. */ /* Note that the ICE returns register contents as ascii hex strings. We have to convert that to an unsigned long, and then call store_unsigned_integer to convert it to target byte-order if necessary. */ static void v850ice_fetch_registers (regno) int regno; { long retval; char cmd[100]; char val[100]; struct MessageIO iob; unsigned long regval; char *p; if (regno == -1) { for (regno = 0; regno < NUM_REGS; regno++) v850ice_fetch_registers (regno); return; } strcpy (cmd, "reg "); if (!convert_register (regno, &cmd[4])) return; iob.size = sizeof val; iob.buf = val; retval = ExeAppReq ("GDB", GREADREG, cmd, &iob); if (retval) error ("1: ExeAppReq returned %d: cmd = %s", retval, cmd); regval = strtoul (val, NULL, 16); if (regval == 0 && p == val) error ("v850ice_fetch_registers (%d): bad value from ICE: %s.", regno, val); store_unsigned_integer (val, REGISTER_RAW_SIZE (regno), regval); supply_register (regno, val); } /* Store register REGNO, or all registers if REGNO == -1, from the contents of REGISTERS. */ static void v850ice_store_registers (regno) int regno; { long retval; char cmd[100]; unsigned long regval; char buf[256]; struct MessageIO iob; iob.size = 0; iob.buf = buf; if (regno == -1) { for (regno = 0; regno < NUM_REGS; regno++) v850ice_store_registers (regno); return; } regval = extract_unsigned_integer (®isters[REGISTER_BYTE (regno)], REGISTER_RAW_SIZE (regno)); strcpy (cmd, "reg "); if (!convert_register (regno, &cmd[4])) return; sprintf (cmd + strlen (cmd), "=0x%x", regval); retval = ExeAppReq ("GDB", GWRITEREG, cmd, &iob); if (retval) error ("2: ExeAppReq returned %d: cmd = %s", retval, cmd); } /* Prepare to store registers. Nothing to do here, since the ICE can write one register at a time. */ static void v850ice_prepare_to_store () { } /* Read or write LEN bytes from inferior memory at MEMADDR, transferring to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is nonzero. Returns length of data written or read; 0 for error. We can only read/write MAX_BLOCK_SIZE bytes at a time, though, or the DLL dies */ /* ARGSUSED */ static int v850ice_xfer_memory (memaddr, myaddr, len, should_write, target) CORE_ADDR memaddr; char *myaddr; int len; int should_write; struct target_ops *target; /* ignored */ { long retval; char cmd[100]; struct MessageIO iob; int sent; if (should_write) { if (len == 4 || len == 2 || len == 1) { long value = 0; char buf[256]; char c; iob.size = 0; iob.buf = buf; sent = 0; switch (len) { case 4: c = 'w'; value |= (long) ((myaddr[3] << 24) & 0xff000000); value |= (long) ((myaddr[2] << 16) & 0x00ff0000); value |= (long) ((myaddr[1] << 8) & 0x0000ff00); value |= (long) (myaddr[0] & 0x000000ff); break; case 2: c = 'h'; value |= (long) ((myaddr[1] << 8) & 0xff00); value |= (long) (myaddr[0] & 0x00ff); break; case 1: c = 'b'; value |= (long) (myaddr[0] & 0xff); break; } sprintf (cmd, "memory %c c 0x%x=0x%x", c, (int) memaddr, value); retval = ExeAppReq ("GDB", GWRITEMEM, cmd, &iob); if (retval == 0) sent = len; } else { sent = 0; do { iob.size = len > MAX_BLOCK_SIZE ? MAX_BLOCK_SIZE : len; iob.buf = myaddr; sprintf (cmd, "memory b c 0x%x=0x00 l=%d", (int) memaddr, iob.size); retval = ExeAppReq ("GDB", GWRITEBLOCK, cmd, &iob); if (retval != 0) break; len -= iob.size; memaddr += iob.size; myaddr += iob.size; sent += iob.size; } while (len > 0); } } else { unsigned char *tmp; unsigned char *t; int i; tmp = alloca (len + 100); t = tmp; memset (tmp + len, 0xff, 100); sent = 0; do { iob.size = len > MAX_BLOCK_SIZE ? MAX_BLOCK_SIZE : len; iob.buf = tmp; sprintf (cmd, "memory b 0x%x l=%d", (int) memaddr, iob.size); retval = ExeAppReq ("GDB", GREADBLOCK, cmd, &iob); if (retval != 0) break; len -= iob.size; memaddr += iob.size; sent += iob.size; tmp += iob.size; } while (len > 0); if (retval == 0) { for (i = 0; i < 100; i++) { if (t[sent + i] != 0xff) { warning ("GREADBLOCK trashed bytes after transfer area."); break; } } memcpy (myaddr, t, sent); } } if (retval != 0) error ("3: ExeAppReq returned %d: cmd = %s", retval, cmd); return sent; } static void v850ice_files_info (ignore) struct target_ops *ignore; { puts_filtered ("Debugging a target via the NEC V850 ICE.\n"); } static int v850ice_insert_breakpoint (addr, contents_cache) CORE_ADDR addr; char *contents_cache; { long retval; char cmd[100]; char buf[256]; struct MessageIO iob; iob.size = 0; iob.buf = buf; sprintf (cmd, "%d, ", addr); retval = ExeAppReq ("GDB", GSETBREAK, cmd, &iob); if (retval) error ("ExeAppReq (GSETBREAK) returned %d: cmd = %s", retval, cmd); return 0; } static int v850ice_remove_breakpoint (addr, contents_cache) CORE_ADDR addr; char *contents_cache; { long retval; char cmd[100]; char buf[256]; struct MessageIO iob; iob.size = 0; iob.buf = buf; sprintf (cmd, "%d, ", addr); retval = ExeAppReq ("GDB", GREMOVEBREAK, cmd, &iob); if (retval) error ("ExeAppReq (GREMOVEBREAK) returned %d: cmd = %s", retval, cmd); return 0; } static void v850ice_kill () { target_mourn_inferior (); inferior_pid = 0; } static void v850ice_mourn () { } static void v850ice_load (filename, from_tty) char *filename; int from_tty; { struct MessageIO iob; char buf[256]; iob.size = 0; iob.buf = buf; generic_load (filename, from_tty); ExeAppReq ("GDB", GDOWNLOAD, filename, &iob); } static int ice_file (arg) char *arg; { char *s; target_detach (NULL, 0); pop_target (); printf_unfiltered ("\n"); s = arg; while (*s != '\0') { if (*s == '\\') *s = '/'; s++; } /* Safegaurd against confusing the breakpoint routines... */ delete_command (NULL, 0); /* Must supress from_tty, otherwise we could start asking if the user really wants to load a new symbol table, etc... */ printf_unfiltered ("Reading symbols from %s...", arg); exec_file_command (arg, 0); symbol_file_command (arg, 0); printf_unfiltered ("done\n"); /* exec_file_command will kill our target, so reinstall the ICE as the target. */ v850ice_open (NULL, 0); togdb_force_update (); return 1; } static int ice_cont (c) char *c; { printf_filtered ("continue (ice)\n"); ReplyMessage ((LRESULT) 1); continue_command (NULL, 1); return 1; } static void do_gdb (cmd, str, func, count) char *cmd; char *str; void (*func) PARAMS ((char *, int)); int count; { ReplyMessage ((LRESULT) 1); while (count--) { printf_unfiltered (str); func (NULL, 0); } } static int ice_stepi (c) char *c; { int count = (int) c; do_gdb ("gdb_immediate stepi", "stepi (ice)\n", stepi_command, count); return 1; } static int ice_nexti (c) char *c; { int count = (int) c; do_gdb ("gdb_immediate nexti", "nexti (ice)\n", nexti_command, count); return 1; } static void v850ice_command (arg, from_tty) char *arg; int from_tty; { struct MessageIO iob; char buf[256]; iob.buf = buf; iob.size = 0; ExeAppReq ("GDB", GCOMMAND, arg, &iob); } static void togdb_force_update (void) { } /* Define the target subroutine names */ static void init_850ice_ops (void) { v850ice_ops.to_shortname = "ice"; v850ice_ops.to_longname = "NEC V850 ICE interface"; v850ice_ops.to_doc = "Debug a system controlled by a NEC 850 ICE."; v850ice_ops.to_open = v850ice_open; v850ice_ops.to_close = v850ice_close; v850ice_ops.to_attach = NULL; v850ice_ops.to_post_attach = NULL; v850ice_ops.to_require_attach = NULL; v850ice_ops.to_detach = v850ice_detach; v850ice_ops.to_require_detach = NULL; v850ice_ops.to_resume = v850ice_resume; v850ice_ops.to_wait = v850ice_wait; v850ice_ops.to_post_wait = NULL; v850ice_ops.to_fetch_registers = v850ice_fetch_registers; v850ice_ops.to_store_registers = v850ice_store_registers; v850ice_ops.to_prepare_to_store = v850ice_prepare_to_store; v850ice_ops.to_xfer_memory = v850ice_xfer_memory; v850ice_ops.to_files_info = v850ice_files_info; v850ice_ops.to_insert_breakpoint = v850ice_insert_breakpoint; v850ice_ops.to_remove_breakpoint = v850ice_remove_breakpoint; v850ice_ops.to_terminal_init = NULL; v850ice_ops.to_terminal_inferior = NULL; v850ice_ops.to_terminal_ours_for_output = NULL; v850ice_ops.to_terminal_ours = NULL; v850ice_ops.to_terminal_info = NULL; v850ice_ops.to_kill = v850ice_kill; v850ice_ops.to_load = v850ice_load; v850ice_ops.to_lookup_symbol = NULL; v850ice_ops.to_create_inferior = NULL; v850ice_ops.to_mourn_inferior = v850ice_mourn; v850ice_ops.to_can_run = 0; v850ice_ops.to_notice_signals = 0; v850ice_ops.to_thread_alive = NULL; v850ice_ops.to_stop = v850ice_stop; v850ice_ops.to_pid_to_exec_file = NULL; v850ice_ops.to_core_file_to_sym_file = NULL; v850ice_ops.to_stratum = process_stratum; v850ice_ops.DONT_USE = NULL; v850ice_ops.to_has_all_memory = 1; v850ice_ops.to_has_memory = 1; v850ice_ops.to_has_stack = 1; v850ice_ops.to_has_registers = 1; v850ice_ops.to_has_execution = 1; v850ice_ops.to_sections = NULL; v850ice_ops.to_sections_end = NULL; v850ice_ops.to_magic = OPS_MAGIC; } void _initialize_v850ice () { init_850ice_ops (); add_target (&v850ice_ops); add_com ("ice", class_obscure, v850ice_command, "Send command to ICE"); }