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Diffstat (limited to 'gdb/remote-nindy.c')
| -rw-r--r-- | gdb/remote-nindy.c | 962 |
1 files changed, 962 insertions, 0 deletions
diff --git a/gdb/remote-nindy.c b/gdb/remote-nindy.c new file mode 100644 index 0000000..5724f42 --- /dev/null +++ b/gdb/remote-nindy.c @@ -0,0 +1,962 @@ +/* Memory-access and commands for remote NINDY process, for GDB. + Copyright (C) 1990-1991 Free Software Foundation, Inc. + Contributed by Intel Corporation. Modified from remote.c by Chris Benenati. + +GDB is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY. No author or distributor accepts responsibility to anyone +for the consequences of using it or for whether it serves any +particular purpose or works at all, unless he says so in writing. +Refer to the GDB General Public License for full details. + +Everyone is granted permission to copy, modify and redistribute GDB, +but only under the conditions described in the GDB General Public +License. A copy of this license is supposed to have been given to you +along with GDB so you can know your rights and responsibilities. It +should be in a file named COPYING. Among other things, the copyright +notice and this notice must be preserved on all copies. + +In other words, go ahead and share GDB, but don't try to stop +anyone else from sharing it farther. Help stamp out software hoarding! +*/ + +/* +Except for the data cache routines, this file bears little resemblence +to remote.c. A new (although similar) protocol has been specified, and +portions of the code are entirely dependent on having an i80960 with a +NINDY ROM monitor at the other end of the line. +*/ + +/***************************************************************************** + * + * REMOTE COMMUNICATION PROTOCOL BETWEEN GDB960 AND THE NINDY ROM MONITOR. + * + * + * MODES OF OPERATION + * ----- -- --------- + * + * As far as NINDY is concerned, GDB is always in one of two modes: command + * mode or passthrough mode. + * + * In command mode (the default) pre-defined packets containing requests + * are sent by GDB to NINDY. NINDY never talks except in reponse to a request. + * + * Once the the user program is started, GDB enters passthrough mode, to give + * the user program access to the terminal. GDB remains in this mode until + * NINDY indicates that the program has stopped. + * + * + * PASSTHROUGH MODE + * ----------- ---- + * + * GDB writes all input received from the keyboard directly to NINDY, and writes + * all characters received from NINDY directly to the monitor. + * + * Keyboard input is neither buffered nor echoed to the monitor. + * + * GDB remains in passthrough mode until NINDY sends a single ^P character, + * to indicate that the user process has stopped. + * + * Note: + * GDB assumes NINDY performs a 'flushreg' when the user program stops. + * + * + * COMMAND MODE + * ------- ---- + * + * All info (except for message ack and nak) is transferred between gdb + * and the remote processor in messages of the following format: + * + * <info>#<checksum> + * + * where + * # is a literal character + * + * <info> ASCII information; all numeric information is in the + * form of hex digits ('0'-'9' and lowercase 'a'-'f'). + * + * <checksum> + * is a pair of ASCII hex digits representing an 8-bit + * checksum formed by adding together each of the + * characters in <info>. + * + * The receiver of a message always sends a single character to the sender + * to indicate that the checksum was good ('+') or bad ('-'); the sender + * re-transmits the entire message over until a '+' is received. + * + * In response to a command NINDY always sends back either data or + * a result code of the form "Xnn", where "nn" are hex digits and "X00" + * means no errors. (Exceptions: the "s" and "c" commands don't respond.) + * + * SEE THE HEADER OF THE FILE "gdb.c" IN THE NINDY MONITOR SOURCE CODE FOR A + * FULL DESCRIPTION OF LEGAL COMMANDS. + * + * SEE THE FILE "stop.h" IN THE NINDY MONITOR SOURCE CODE FOR A LIST + * OF STOP CODES. + * + ******************************************************************************/ + +#include <stdio.h> +#include <signal.h> +#include <sys/types.h> +#include <setjmp.h> + +#include "defs.h" +#include "param.h" +#include "frame.h" +#include "inferior.h" +#include "target.h" +#include "gdbcore.h" +#include "command.h" +#include "bfd.h" +#include "ieee-float.h" + +#include "wait.h" +#include <sys/ioctl.h> +#include <sys/file.h> +#include <ctype.h> +#include "nindy-share/ttycntl.h" +#include "nindy-share/demux.h" +#include "nindy-share/env.h" +#include "nindy-share/stop.h" + +extern int unlink(); +extern char *getenv(); +extern char *mktemp(); + +extern char *coffstrip(); +extern void add_syms_addr_command (); +extern value call_function_by_hand (); +extern void generic_mourn_inferior (); + +extern struct target_ops nindy_ops; +extern jmp_buf to_top_level; +extern FILE *instream; +extern struct ext_format ext_format_i960[]; /* i960-tdep.c */ + +extern char ninStopWhy (); + +int nindy_initial_brk; /* nonzero if want to send an initial BREAK to nindy */ +int nindy_old_protocol; /* nonzero if want to use old protocol */ +char *nindy_ttyname; /* name of tty to talk to nindy on, or null */ + +#define DLE '\020' /* Character NINDY sends to indicate user program has + * halted. */ +#define TRUE 1 +#define FALSE 0 + +int nindy_fd = 0; /* Descriptor for I/O to NINDY */ +static int have_regs = 0; /* 1 iff regs read since i960 last halted */ +static int regs_changed = 0; /* 1 iff regs were modified since last read */ + +extern char *exists(); +static void dcache_flush (), dcache_poke (), dcache_init(); +static int dcache_fetch (); + +/* FIXME, we can probably use the normal terminal_inferior stuff here. + We have to do terminal_inferior and then set up the passthrough + settings initially. Thereafter, terminal_ours and terminal_inferior + will automatically swap the settings around for us. */ + +/* Restore TTY to normal operation */ + +static TTY_STRUCT orig_tty; /* TTY attributes before entering passthrough */ + +static void +restore_tty() +{ + ioctl( 0, TIOCSETN, &orig_tty ); +} + + +/* Recover from ^Z or ^C while remote process is running */ + +static void (*old_ctrlc)(); /* Signal handlers before entering passthrough */ + +#ifdef SIGTSTP +static void (*old_ctrlz)(); +#endif + +static +#ifdef USG +void +#endif +cleanup() +{ + restore_tty(); + signal(SIGINT, old_ctrlc); +#ifdef SIGTSTP + signal(SIGTSTP, old_ctrlz); +#endif + error("\n\nYou may need to reset the 80960 and/or reload your program.\n"); +} + +/* Clean up anything that needs cleaning when losing control. */ + +static char *savename; + +static void +nindy_close (quitting) + int quitting; +{ + if (nindy_fd) + close (nindy_fd); + nindy_fd = 0; + + if (savename) + free (savename); + savename = 0; +} + +/* Open a connection to a remote debugger. + FIXME, there should be a way to specify the various options that are + now specified with gdb command-line options. (baud_rate, old_protocol, + and initial_brk) */ +void +nindy_open (name, from_tty) + char *name; /* "/dev/ttyXX", "ttyXX", or "XX": tty to be opened */ + int from_tty; +{ + + if (!name) + error_no_arg ("serial port device name"); + + nindy_close (0); + + have_regs = regs_changed = 0; + dcache_init(); + + /* Allow user to interrupt the following -- we could hang if + * there's no NINDY at the other end of the remote tty. + */ + immediate_quit++; + nindy_fd = ninConnect( name, baud_rate? baud_rate: "9600", + nindy_initial_brk, !from_tty, nindy_old_protocol ); + immediate_quit--; + + if ( nindy_fd < 0 ){ + nindy_fd = 0; + error( "Can't open tty '%s'", name ); + } + + savename = savestring (name, strlen (name)); + push_target (&nindy_ops); + target_fetch_registers(-1); +} + +/* User-initiated quit of nindy operations. */ + +static void +nindy_detach (name, from_tty) + char *name; + int from_tty; +{ + dont_repeat (); + if (name) + error ("Too many arguments"); + pop_target (); +} + +static void +nindy_files_info () +{ + printf("\tAttached to %s at %s bps%s%s.\n", savename, + baud_rate? baud_rate: "9600", + nindy_old_protocol? " in old protocol": "", + nindy_initial_brk? " with initial break": ""); +} + +/****************************************************************************** + * remote_load: + * Download an object file to the remote system by invoking the "comm960" + * utility. We look for "comm960" in $G960BIN, $G960BASE/bin, and + * DEFAULT_BASE/bin/HOST/bin where + * DEFAULT_BASE is defined in env.h, and + * HOST must be defined on the compiler invocation line. + ******************************************************************************/ + +static void +nindy_load( filename, from_tty ) + char *filename; + int from_tty; +{ + char *tmpfile; + struct cleanup *old_chain; + char *scratch_pathname; + int scratch_chan; + + if (!filename) + filename = get_exec_file (1); + + filename = tilde_expand (filename); + make_cleanup (free, filename); + + scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0, + &scratch_pathname); + if (scratch_chan < 0) + perror_with_name (filename); + close (scratch_chan); /* Slightly wasteful FIXME */ + + have_regs = regs_changed = 0; + mark_breakpoints_out(); + inferior_pid = 0; + dcache_flush(); + + tmpfile = coffstrip(scratch_pathname); + if ( tmpfile ){ + old_chain = make_cleanup(unlink,tmpfile); + immediate_quit++; + ninDownload( tmpfile, !from_tty ); +/* FIXME, don't we want this merged in here? */ + immediate_quit--; + do_cleanups (old_chain); + } +} + + + +/* Return the number of characters in the buffer before the first DLE character. + */ + +static +int +non_dle( buf, n ) + char *buf; /* Character buffer; NOT '\0'-terminated */ + int n; /* Number of characters in buffer */ +{ + int i; + + for ( i = 0; i < n; i++ ){ + if ( buf[i] == DLE ){ + break; + } + } + return i; +} + +/* Tell the remote machine to resume. */ + +void +nindy_resume (step, siggnal) + int step, siggnal; +{ + if (siggnal != 0 && siggnal != stop_signal) + error ("Can't send signals to remote NINDY targets."); + + dcache_flush(); + if ( regs_changed ){ + nindy_store_registers (); + regs_changed = 0; + } + have_regs = 0; + ninGo( step ); +} + +/* Wait until the remote machine stops. While waiting, operate in passthrough + * mode; i.e., pass everything NINDY sends to stdout, and everything from + * stdin to NINDY. + * + * Return to caller, storing status in 'status' just as `wait' would. + */ + +void +nindy_wait( status ) + WAITTYPE *status; +{ + DEMUX_DECL; /* OS-dependent data needed by DEMUX... macros */ + char buf[500]; /* FIXME, what is "500" here? */ + int i, n; + unsigned char stop_exit; + unsigned char stop_code; + TTY_STRUCT tty; + long ip_value, fp_value, sp_value; /* Reg values from stop */ + + + WSETEXIT( (*status), 0 ); + + /* OPERATE IN PASSTHROUGH MODE UNTIL NINDY SENDS A DLE CHARACTER */ + + /* Save current tty attributes, set up signals to restore them. + */ + ioctl( 0, TIOCGETP, &orig_tty ); + old_ctrlc = signal( SIGINT, cleanup ); +#ifdef SIGTSTP + old_ctrlz = signal( SIGTSTP, cleanup ); +#endif + + /* Pass input from keyboard to NINDY as it arrives. + * NINDY will interpret <CR> and perform echo. + */ + tty = orig_tty; + TTY_NINDYTERM( tty ); + ioctl( 0, TIOCSETN, &tty ); + + while ( 1 ){ + /* Go to sleep until there's something for us on either + * the remote port or stdin. + */ + + DEMUX_WAIT( nindy_fd ); + + /* Pass input through to correct place */ + + n = DEMUX_READ( 0, buf, sizeof(buf) ); + if ( n ){ /* Input on stdin */ + write( nindy_fd, buf, n ); + } + + n = DEMUX_READ( nindy_fd, buf, sizeof(buf) ); + if ( n ){ /* Input on remote */ + /* Write out any characters in buffer preceding DLE */ + i = non_dle( buf, n ); + if ( i > 0 ){ + write( 1, buf, i ); + } + + if ( i != n ){ + /* There *was* a DLE in the buffer */ + stop_exit = ninStopWhy( &stop_code, + &ip_value, &fp_value, &sp_value); + if ( !stop_exit && (stop_code==STOP_SRQ) ){ + immediate_quit++; + ninSrq(); + immediate_quit--; + } else { + /* Get out of loop */ + supply_register (IP_REGNUM, &ip_value); + supply_register (FP_REGNUM, &fp_value); + supply_register (SP_REGNUM, &sp_value); + break; + } + } + } + } + + signal( SIGINT, old_ctrlc ); +#ifdef SIGTSTP + signal( SIGTSTP, old_ctrlz ); +#endif + restore_tty(); + + if ( stop_exit ){ /* User program exited */ + WSETEXIT( (*status), stop_code ); + } else { /* Fault or trace */ + switch (stop_code){ + case STOP_GDB_BPT: + case TRACE_STEP: + /* Make it look like a VAX trace trap */ + stop_code = SIGTRAP; + break; + default: + /* The target is not running Unix, and its + faults/traces do not map nicely into Unix signals. + Make sure they do not get confused with Unix signals + by numbering them with values higher than the highest + legal Unix signal. code in i960_print_fault(), + called via PRINT_RANDOM_SIGNAL, will interpret the + value. */ + stop_code += NSIG; + break; + } + WSETSTOP( (*status), stop_code ); + } +} + +/* Read the remote registers into the block REGS. */ + +/* This is the block that ninRegsGet and ninRegsPut handles. */ +struct nindy_regs { + char local_regs[16 * 4]; + char global_regs[16 * 4]; + char pcw_acw[2 * 4]; + char ip[4]; + char tcw[4]; + char fp_as_double[4 * 8]; +}; + +static int +nindy_fetch_registers(regno) + int regno; +{ + struct nindy_regs nindy_regs; + int regnum, inv; + double dub; + + immediate_quit++; + ninRegsGet( (char *) &nindy_regs ); + immediate_quit--; + + bcopy (nindy_regs.local_regs, ®isters[REGISTER_BYTE (R0_REGNUM)], 16*4); + bcopy (nindy_regs.global_regs, ®isters[REGISTER_BYTE (G0_REGNUM)], 16*4); + bcopy (nindy_regs.pcw_acw, ®isters[REGISTER_BYTE (PCW_REGNUM)], 2*4); + bcopy (nindy_regs.ip, ®isters[REGISTER_BYTE (IP_REGNUM)], 1*4); + bcopy (nindy_regs.tcw, ®isters[REGISTER_BYTE (TCW_REGNUM)], 1*4); + for (regnum = FP0_REGNUM; regnum < FP0_REGNUM + 4; regnum++) { + dub = unpack_double (builtin_type_double, + &nindy_regs.fp_as_double[8 * (regnum - FP0_REGNUM)], + &inv); + /* dub now in host byte order */ + double_to_ieee_extended (ext_format_i960, &dub, + ®isters[REGISTER_BYTE (regnum)]); + } + + registers_fetched (); + return 0; +} + +static void +nindy_prepare_to_store() +{ + nindy_fetch_registers(-1); +} + +static int +nindy_store_registers(regno) + int regno; +{ + struct nindy_regs nindy_regs; + int regnum, inv; + double dub; + + bcopy (®isters[REGISTER_BYTE (R0_REGNUM)], nindy_regs.local_regs, 16*4); + bcopy (®isters[REGISTER_BYTE (G0_REGNUM)], nindy_regs.global_regs, 16*4); + bcopy (®isters[REGISTER_BYTE (PCW_REGNUM)], nindy_regs.pcw_acw, 2*4); + bcopy (®isters[REGISTER_BYTE (IP_REGNUM)], nindy_regs.ip, 1*4); + bcopy (®isters[REGISTER_BYTE (TCW_REGNUM)], nindy_regs.tcw, 1*4); + /* Float regs. Only works on IEEE_FLOAT hosts. */ + for (regnum = FP0_REGNUM; regnum < FP0_REGNUM + 4; regnum++) { + ieee_extended_to_double (ext_format_i960, + ®isters[REGISTER_BYTE (regnum)], &dub); + /* dub now in host byte order */ + /* FIXME-someday, the arguments to unpack_double are backward. + It expects a target double and returns a host; we pass the opposite. + This mostly works but not quite. */ + dub = unpack_double (builtin_type_double, &dub, &inv); + /* dub now in target byte order */ + bcopy ((char *)&dub, &nindy_regs.fp_as_double[8 * (regnum - FP0_REGNUM)], + 8); + } + + immediate_quit++; + ninRegsPut( (char *) &nindy_regs ); + immediate_quit--; + return 0; +} + +/* Read a word from remote address ADDR and return it. + * This goes through the data cache. + */ +int +nindy_fetch_word (addr) + CORE_ADDR addr; +{ + return dcache_fetch (addr); +} + +/* Write a word WORD into remote address ADDR. + This goes through the data cache. */ + +void +nindy_store_word (addr, word) + CORE_ADDR addr; + int word; +{ + dcache_poke (addr, word); +} + +/* Copy LEN bytes to or from inferior's memory starting at MEMADDR + to debugger memory starting at MYADDR. Copy to inferior if + WRITE is nonzero. Returns the length copied. + + This is stolen almost directly from infptrace.c's child_xfer_memory, + which also deals with a word-oriented memory interface. Sometime, + FIXME, rewrite this to not use the word-oriented routines. */ + +int +nindy_xfer_inferior_memory(memaddr, myaddr, len, write) + CORE_ADDR memaddr; + char *myaddr; + int len; + int write; +{ + register int i; + /* Round starting address down to longword boundary. */ + register CORE_ADDR addr = memaddr & - sizeof (int); + /* Round ending address up; get number of longwords that makes. */ + register int count + = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); + /* Allocate buffer of that many longwords. */ + register int *buffer = (int *) alloca (count * sizeof (int)); + + if (write) + { + /* Fill start and end extra bytes of buffer with existing memory data. */ + + if (addr != memaddr || len < (int)sizeof (int)) { + /* Need part of initial word -- fetch it. */ + buffer[0] = nindy_fetch_word (addr); + } + + if (count > 1) /* FIXME, avoid if even boundary */ + { + buffer[count - 1] + = nindy_fetch_word (addr + (count - 1) * sizeof (int)); + } + + /* Copy data to be written over corresponding part of buffer */ + + bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); + + /* Write the entire buffer. */ + + for (i = 0; i < count; i++, addr += sizeof (int)) + { + errno = 0; + nindy_store_word (addr, buffer[i]); + if (errno) + return 0; + } + } + else + { + /* Read all the longwords */ + for (i = 0; i < count; i++, addr += sizeof (int)) + { + errno = 0; + buffer[i] = nindy_fetch_word (addr); + if (errno) + return 0; + QUIT; + } + + /* Copy appropriate bytes out of the buffer. */ + bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); + } + return len; +} + +/* The data cache records all the data read from the remote machine + since the last time it stopped. + + Each cache block holds 16 bytes of data + starting at a multiple-of-16 address. */ + +#define DCACHE_SIZE 64 /* Number of cache blocks */ + +struct dcache_block { + struct dcache_block *next, *last; + unsigned int addr; /* Address for which data is recorded. */ + int data[4]; +}; + +struct dcache_block dcache_free, dcache_valid; + +/* Free all the data cache blocks, thus discarding all cached data. */ +static +void +dcache_flush () +{ + register struct dcache_block *db; + + while ((db = dcache_valid.next) != &dcache_valid) + { + remque (db); + insque (db, &dcache_free); + } +} + +/* + * If addr is present in the dcache, return the address of the block + * containing it. + */ +static +struct dcache_block * +dcache_hit (addr) + unsigned int addr; +{ + register struct dcache_block *db; + + if (addr & 3) + abort (); + + /* Search all cache blocks for one that is at this address. */ + db = dcache_valid.next; + while (db != &dcache_valid) + { + if ((addr & 0xfffffff0) == db->addr) + return db; + db = db->next; + } + return NULL; +} + +/* Return the int data at address ADDR in dcache block DC. */ +static +int +dcache_value (db, addr) + struct dcache_block *db; + unsigned int addr; +{ + if (addr & 3) + abort (); + return (db->data[(addr>>2)&3]); +} + +/* Get a free cache block, put or keep it on the valid list, + and return its address. The caller should store into the block + the address and data that it describes, then remque it from the + free list and insert it into the valid list. This procedure + prevents errors from creeping in if a ninMemGet is interrupted + (which used to put garbage blocks in the valid list...). */ +static +struct dcache_block * +dcache_alloc () +{ + register struct dcache_block *db; + + if ((db = dcache_free.next) == &dcache_free) + { + /* If we can't get one from the free list, take last valid and put + it on the free list. */ + db = dcache_valid.last; + remque (db); + insque (db, &dcache_free); + } + + remque (db); + insque (db, &dcache_valid); + return (db); +} + +/* Return the contents of the word at address ADDR in the remote machine, + using the data cache. */ +static +int +dcache_fetch (addr) + CORE_ADDR addr; +{ + register struct dcache_block *db; + + db = dcache_hit (addr); + if (db == 0) + { + db = dcache_alloc (); + immediate_quit++; + ninMemGet(addr & ~0xf, (unsigned char *)db->data, 16); + immediate_quit--; + db->addr = addr & ~0xf; + remque (db); /* Off the free list */ + insque (db, &dcache_valid); /* On the valid list */ + } + return (dcache_value (db, addr)); +} + +/* Write the word at ADDR both in the data cache and in the remote machine. */ +static void +dcache_poke (addr, data) + CORE_ADDR addr; + int data; +{ + register struct dcache_block *db; + + /* First make sure the word is IN the cache. DB is its cache block. */ + db = dcache_hit (addr); + if (db == 0) + { + db = dcache_alloc (); + immediate_quit++; + ninMemGet(addr & ~0xf, (unsigned char *)db->data, 16); + immediate_quit--; + db->addr = addr & ~0xf; + remque (db); /* Off the free list */ + insque (db, &dcache_valid); /* On the valid list */ + } + + /* Modify the word in the cache. */ + db->data[(addr>>2)&3] = data; + + /* Send the changed word. */ + immediate_quit++; + ninMemPut(addr, (unsigned char *)&data, 4); + immediate_quit--; +} + +/* The cache itself. */ +struct dcache_block the_cache[DCACHE_SIZE]; + +/* Initialize the data cache. */ +static void +dcache_init () +{ + register i; + register struct dcache_block *db; + + db = the_cache; + dcache_free.next = dcache_free.last = &dcache_free; + dcache_valid.next = dcache_valid.last = &dcache_valid; + for (i=0;i<DCACHE_SIZE;i++,db++) + insque (db, &dcache_free); +} + + +static void +nindy_create_inferior (execfile, args, env) + char *execfile; + char *args; + char **env; +{ + int entry_pt; + int pid; + + if (args && *args) + error ("Can't pass arguments to remote NINDY process"); + + if (execfile == 0 || exec_bfd == 0) + error ("No exec file specified"); + + entry_pt = (int) bfd_get_start_address (exec_bfd); + + pid = 42; + +#ifdef CREATE_INFERIOR_HOOK + CREATE_INFERIOR_HOOK (pid); +#endif + +/* The "process" (board) is already stopped awaiting our commands, and + the program is already downloaded. We just set its PC and go. */ + + inferior_pid = pid; /* Needed for wait_for_inferior below */ + + clear_proceed_status (); + +#if defined (START_INFERIOR_HOOK) + START_INFERIOR_HOOK (); +#endif + + /* Tell wait_for_inferior that we've started a new process. */ + init_wait_for_inferior (); + + /* Set up the "saved terminal modes" of the inferior + based on what modes we are starting it with. */ + target_terminal_init (); + + /* Install inferior's terminal modes. */ + target_terminal_inferior (); + + /* remote_start(args); */ + /* trap_expected = 0; */ + /* insert_step_breakpoint (); FIXME, do we need this? */ + proceed ((CORE_ADDR)entry_pt, -1, 0); /* Let 'er rip... */ +} + +static void +reset_command(args, from_tty) + char *args; + int from_tty; +{ + if ( !nindy_fd ){ + error( "No target system to reset -- use 'target nindy' command."); + } + if ( query("Really reset the target system?",0,0) ){ + send_break( nindy_fd ); + tty_flush( nindy_fd ); + } +} + +void +nindy_kill (args, from_tty) + char *args; + int from_tty; +{ + return; /* Ignore attempts to kill target system */ +} + +/* Clean up when a program exits. + + The program actually lives on in the remote processor's RAM, and may be + run again without a download. Don't leave it full of breakpoint + instructions. */ + +void +nindy_mourn_inferior () +{ + remove_breakpoints (); + generic_mourn_inferior (); /* Do all the proper things now */ +} + +/* This routine is run as a hook, just before the main command loop is + entered. If gdb is configured for the i960, but has not had its + nindy target specified yet, this will loop prompting the user to do so. + + Unlike the loop provided by Intel, we actually let the user get out + of this with a RETURN. This is useful when e.g. simply examining + an i960 object file on the host system. */ + +nindy_before_main_loop () +{ + char ttyname[100]; + char *p, *p2; + + setjmp(to_top_level); + while (current_target != &nindy_ops) { /* remote tty not specified yet */ + if ( instream == stdin ){ + printf("\nAttach /dev/ttyNN -- specify NN, or \"quit\" to quit: "); + fflush( stdout ); + } + fgets( ttyname, sizeof(ttyname)-1, stdin ); + + /* Strip leading and trailing whitespace */ + for ( p = ttyname; isspace(*p); p++ ){ + ; + } + if ( *p == '\0' ){ + return; /* User just hit spaces or return, wants out */ + } + for ( p2= p; !isspace(*p2) && (*p2 != '\0'); p2++ ){ + ; + } + *p2= '\0'; + if ( !strcmp("quit",p) ){ + exit(1); + } + + nindy_open( p, 1 ); + + /* Now that we have a tty open for talking to the remote machine, + download the executable file if one was specified. */ + if ( !setjmp(to_top_level) && exec_bfd ) { + target_load (bfd_get_filename (exec_bfd), 1); + } + } +} + +/* Define the target subroutine names */ + +struct target_ops nindy_ops = { + "nindy", "Remote serial target in i960 NINDY-specific protocol", + nindy_open, nindy_close, + 0, nindy_detach, nindy_resume, nindy_wait, + nindy_fetch_registers, nindy_store_registers, + nindy_prepare_to_store, 0, 0, /* conv_from, conv_to */ + nindy_xfer_inferior_memory, nindy_files_info, + 0, 0, /* insert_breakpoint, remove_breakpoint, */ + 0, 0, 0, 0, 0, /* Terminal crud */ + nindy_kill, + nindy_load, add_syms_addr_command, + call_function_by_hand, + 0, /* lookup_symbol */ + nindy_create_inferior, + nindy_mourn_inferior, + process_stratum, 0, /* next */ + 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ + OPS_MAGIC, /* Always the last thing */ +}; + +void +_initialize_nindy () +{ + add_target (&nindy_ops); + add_com ("reset", class_obscure, reset_command, + "Send a 'break' to the remote target system.\n\ +Only useful if the target has been equipped with a circuit\n\ +to perform a hard reset when a break is detected."); +} |