diff options
| -rw-r--r-- | gdb/ChangeLog | 5 | ||||
| -rw-r--r-- | gdb/configure.in | 6 | ||||
| -rw-r--r-- | gdb/remote-st2000.c | 1001 |
3 files changed, 1012 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 306a02f..5e0dcad 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,8 @@ +Mon Jun 8 14:17:42 1992 Stu Grossman (grossman at cygnus.com) + + * configure.in: Tandem debug monitor (st2000) support. + * remote-st2000.c, config/st2000.mt: ditto. + Fri Jun 5 11:51:01 1992 John Gilmore (gnu at cygnus.com) * blockframe.c (inside_entry_file, inside_main_func, diff --git a/gdb/configure.in b/gdb/configure.in index e09798f..825a628 100644 --- a/gdb/configure.in +++ b/gdb/configure.in @@ -233,6 +233,12 @@ m68030) esac ;; +m68kmote) + case "${target_vendor}" in + tandem) gdb_target=st2000 ;; + esac + ;; + none | arm | tahoe | vax | np1 | pn | np1 | pn | pyramid | merlin) gdb_target=${target_cpu} ;; diff --git a/gdb/remote-st2000.c b/gdb/remote-st2000.c new file mode 100644 index 0000000..778df86 --- /dev/null +++ b/gdb/remote-st2000.c @@ -0,0 +1,1001 @@ +/* Remote debugging interface for AMD 29000 EBMON on IBM PC, for GDB. + Copyright 1990, 1991, 1992 Free Software Foundation, Inc. + Contributed by Cygnus Support. Written by Jim Kingdon for Cygnus. + +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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* This is like remote.c but is for an esoteric situation-- + having a 29k board in a PC hooked up to a unix machine with + a serial line, and running ctty com1 on the PC, through which + the unix machine can run ebmon. Not to mention that the PC + has PC/NFS, so it can access the same executables that gdb can, + over the net in real time. */ + +#define TM_FILE_OVERRIDE +#include "defs.h" +#include <string.h> +#include "tm-29k.h" + +#include "inferior.h" +#include "wait.h" +#include "value.h" +#include <ctype.h> +#include <fcntl.h> +#include <signal.h> +#include <errno.h> +#include "terminal.h" +#include "target.h" +#include "gdbcore.h" + +extern struct target_ops eb_ops; /* Forward declaration */ + +static void eb_close(); + +#define LOG_FILE "eb.log" +#if defined (LOG_FILE) +FILE *log_file; +#endif + +static int timeout = 24; + +/* Descriptor for I/O to remote machine. Initialize it to -1 so that + eb_open knows that we don't have a file open when the program + starts. */ +int eb_desc = -1; + +/* stream which is fdopen'd from eb_desc. Only valid when + eb_desc != -1. */ +FILE *eb_stream; + +/* Read a character from the remote system, doing all the fancy + timeout stuff. */ +static int +readchar () +{ + char buf; + + buf = '\0'; +#ifdef HAVE_TERMIO + /* termio does the timeout for us. */ + read (eb_desc, &buf, 1); +#else + alarm (timeout); + if (read (eb_desc, &buf, 1) < 0) + { + if (errno == EINTR) + error ("Timeout reading from remote system."); + else + perror_with_name ("remote"); + } + alarm (0); +#endif + + if (buf == '\0') + error ("Timeout reading from remote system."); +#if defined (LOG_FILE) + putc (buf & 0x7f, log_file); +#endif + return buf & 0x7f; +} + +/* Keep discarding input from the remote system, until STRING is found. + Let the user break out immediately. */ +static void +expect (string) + char *string; +{ + char *p = string; + + immediate_quit = 1; + while (1) + { + if (readchar() == *p) + { + p++; + if (*p == '\0') + { + immediate_quit = 0; + return; + } + } + else + p = string; + } +} + +/* Keep discarding input until we see the ebmon prompt. + + The convention for dealing with the prompt is that you + o give your command + o *then* wait for the prompt. + + Thus the last thing that a procedure does with the serial line + will be an expect_prompt(). Exception: eb_resume does not + wait for the prompt, because the terminal is being handed over + to the inferior. However, the next thing which happens after that + is a eb_wait which does wait for the prompt. + Note that this includes abnormal exit, e.g. error(). This is + necessary to prevent getting into states from which we can't + recover. */ +static void +expect_prompt () +{ +#if defined (LOG_FILE) + /* This is a convenient place to do this. The idea is to do it often + enough that we never lose much data if we terminate abnormally. */ + fflush (log_file); +#endif + expect ("\n# "); +} + +/* Get a hex digit from the remote system & return its value. + If ignore_space is nonzero, ignore spaces (not newline, tab, etc). */ +static int +get_hex_digit (ignore_space) + int ignore_space; +{ + int ch; + while (1) + { + ch = readchar (); + if (ch >= '0' && ch <= '9') + return ch - '0'; + else if (ch >= 'A' && ch <= 'F') + return ch - 'A' + 10; + else if (ch >= 'a' && ch <= 'f') + return ch - 'a' + 10; + else if (ch == ' ' && ignore_space) + ; + else + { + expect_prompt (); + error ("Invalid hex digit from remote system."); + } + } +} + +/* Get a byte from eb_desc and put it in *BYT. Accept any number + leading spaces. */ +static void +get_hex_byte (byt) + char *byt; +{ + int val; + + val = get_hex_digit (1) << 4; + val |= get_hex_digit (0); + *byt = val; +} + +/* Get N 32-bit words from remote, each preceded by a space, + and put them in registers starting at REGNO. */ +static void +get_hex_regs (n, regno) + int n; + int regno; +{ + long val; + int i; + + for (i = 0; i < n; i++) + { + int j; + + val = 0; + for (j = 0; j < 8; j++) + val = (val << 4) + get_hex_digit (j == 0); + supply_register (regno++, &val); + } +} + +/* Called when SIGALRM signal sent due to alarm() timeout. */ +#ifndef HAVE_TERMIO + +#ifndef __STDC__ +#define volatile /**/ +#endif +volatile int n_alarms; + +void +eb_timer () +{ +#if 0 + if (kiodebug) + printf ("eb_timer called\n"); +#endif + n_alarms++; +} +#endif + +/* malloc'd name of the program on the remote system. */ +static char *prog_name = NULL; + +/* Nonzero if we have loaded the file ("yc") and not yet issued a "gi" + command. "gi" is supposed to happen exactly once for each "yc". */ +static int need_gi = 0; + +/* Number of SIGTRAPs we need to simulate. That is, the next + NEED_ARTIFICIAL_TRAP calls to eb_wait should just return + SIGTRAP without actually waiting for anything. */ + +static int need_artificial_trap = 0; + +/* This is called not only when we first attach, but also when the + user types "run" after having attached. */ +static void +eb_create_inferior (execfile, args, env) + char *execfile; + char *args; + char **env; +{ + int entry_pt; + + if (args && *args) + error ("Can't pass arguments to remote EBMON process"); + + if (execfile == 0 || exec_bfd == 0) + error ("No exec file specified"); + + entry_pt = (int) bfd_get_start_address (exec_bfd); + +#ifdef CREATE_INFERIOR_HOOK + CREATE_INFERIOR_HOOK (0); /* No process-ID */ +#endif + + { + /* OK, now read in the file. Y=read, C=COFF, D=no symbols + 0=start address, %s=filename. */ + + fprintf (eb_stream, "YC D,0:%s", prog_name); + + if (args != NULL) + fprintf(eb_stream, " %s", args); + + fprintf (eb_stream, "\n"); + fflush (eb_stream); + + expect_prompt (); + + need_gi = 1; + } + +/* The "process" (board) is already stopped awaiting our commands, and + the program is already downloaded. We just set its PC and go. */ + + clear_proceed_status (); + + /* 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 (); + + /* insert_step_breakpoint (); FIXME, do we need this? */ + proceed ((CORE_ADDR)entry_pt, -1, 0); /* Let 'er rip... */ +} + +/* Translate baud rates from integers to damn B_codes. Unix should + have outgrown this crap years ago, but even POSIX wouldn't buck it. */ + +#ifndef B19200 +#define B19200 EXTA +#endif +#ifndef B38400 +#define B38400 EXTB +#endif + +struct {int rate, damn_b;} baudtab[] = { + {0, B0}, + {50, B50}, + {75, B75}, + {110, B110}, + {134, B134}, + {150, B150}, + {200, B200}, + {300, B300}, + {600, B600}, + {1200, B1200}, + {1800, B1800}, + {2400, B2400}, + {4800, B4800}, + {9600, B9600}, + {19200, B19200}, + {38400, B38400}, + {-1, -1}, +}; + +int damn_b (rate) + int rate; +{ + int i; + + for (i = 0; baudtab[i].rate != -1; i++) + if (rate == baudtab[i].rate) return baudtab[i].damn_b; + return B38400; /* Random */ +} + + +/* Open a connection to a remote debugger. + NAME is the filename used for communication, then a space, + then the name of the program as we should name it to EBMON. */ + +static int baudrate = 9600; +static char *dev_name; +void +eb_open (name, from_tty) + char *name; + int from_tty; +{ + TERMINAL sg; + + char *p; + + target_preopen (from_tty); + + /* Find the first whitespace character, it separates dev_name from + prog_name. */ + if (name == 0) + goto erroid; + + for (p = name; + *p != '\0' && !isspace (*p); p++) + ; + if (*p == '\0') +erroid: + error ("\ +Please include the name of the device for the serial port,\n\ +the baud rate, and the name of the program to run on the remote system."); + dev_name = alloca (p - name + 1); + strncpy (dev_name, name, p - name); + dev_name[p - name] = '\0'; + + /* Skip over the whitespace after dev_name */ + for (; isspace (*p); p++) + /*EMPTY*/; + + if (1 != sscanf (p, "%d ", &baudrate)) + goto erroid; + + /* Skip the number and then the spaces */ + for (; isdigit (*p); p++) + /*EMPTY*/; + for (; isspace (*p); p++) + /*EMPTY*/; + + if (prog_name != NULL) + free (prog_name); + prog_name = savestring (p, strlen (p)); + + eb_close (0); + + eb_desc = open (dev_name, O_RDWR); + if (eb_desc < 0) + perror_with_name (dev_name); + ioctl (eb_desc, TIOCGETP, &sg); +#ifdef HAVE_TERMIO + sg.c_cc[VMIN] = 0; /* read with timeout. */ + sg.c_cc[VTIME] = timeout * 10; + sg.c_lflag &= ~(ICANON | ECHO); + sg.c_cflag = (sg.c_cflag & ~CBAUD) | damn_b (baudrate); +#else + sg.sg_ispeed = damn_b (baudrate); + sg.sg_ospeed = damn_b (baudrate); + sg.sg_flags |= RAW | ANYP; + sg.sg_flags &= ~ECHO; +#endif + + ioctl (eb_desc, TIOCSETP, &sg); + eb_stream = fdopen (eb_desc, "r+"); + + push_target (&eb_ops); + if (from_tty) + printf ("Remote %s debugging %s using %s\n", target_shortname, + prog_name, dev_name); + +#ifndef HAVE_TERMIO +#ifndef NO_SIGINTERRUPT + /* Cause SIGALRM's to make reads fail with EINTR instead of resuming + the read. */ + if (siginterrupt (SIGALRM, 1) != 0) + perror ("eb_open: error in siginterrupt"); +#endif + + /* Set up read timeout timer. */ + if ((void (*)) signal (SIGALRM, eb_timer) == (void (*)) -1) + perror ("eb_open: error in signal"); +#endif + +#if defined (LOG_FILE) + log_file = fopen (LOG_FILE, "w"); + if (log_file == NULL) + perror_with_name (LOG_FILE); +#endif + + /* Hello? Are you there? */ + write (eb_desc, "\n", 1); + + expect_prompt (); +} + +/* Close out all files and local state before this target loses control. */ + +static void +eb_close (quitting) + int quitting; +{ + + /* Due to a bug in Unix, fclose closes not only the stdio stream, + but also the file descriptor. So we don't actually close + eb_desc. */ + if (eb_stream) + fclose (eb_stream); /* This also closes eb_desc */ + if (eb_desc >= 0) + /* close (eb_desc); */ + + /* Do not try to close eb_desc again, later in the program. */ + eb_stream = NULL; + eb_desc = -1; + +#if defined (LOG_FILE) + if (log_file) { + if (ferror (log_file)) + printf ("Error writing log file.\n"); + if (fclose (log_file) != 0) + printf ("Error closing log file.\n"); + } +#endif +} + +/* Terminate the open connection to the remote debugger. + Use this when you want to detach and do something else + with your gdb. */ +void +eb_detach (from_tty) + int from_tty; +{ + pop_target(); /* calls eb_close to do the real work */ + if (from_tty) + printf ("Ending remote %s debugging\n", target_shortname); +} + +/* Tell the remote machine to resume. */ + +void +eb_resume (step, sig) + int step, sig; +{ + if (step) + { + write (eb_desc, "t 1,s\n", 6); + /* Wait for the echo. */ + expect ("t 1,s\r"); + /* Then comes a line containing the instruction we stepped to. */ + expect ("\n@"); + /* Then we get the prompt. */ + expect_prompt (); + + /* Force the next eb_wait to return a trap. Not doing anything + about I/O from the target means that the user has to type + "continue" to see any. This should be fixed. */ + need_artificial_trap = 1; + } + else + { + if (need_gi) + { + need_gi = 0; + write (eb_desc, "gi\n", 3); + + /* Swallow the echo of "gi". */ + expect ("gi\r"); + } + else + { + write (eb_desc, "GR\n", 3); + /* Swallow the echo. */ + expect ("GR\r"); + } + } +} + +/* Wait until the remote machine stops, then return, + storing status in STATUS just as `wait' would. */ + +int +eb_wait (status) + WAITTYPE *status; +{ + /* Strings to look for. '?' means match any single character. + Note that with the algorithm we use, the initial character + of the string cannot recur in the string, or we will not + find some cases of the string in the input. */ + + static char bpt[] = "Invalid interrupt taken - #0x50 - "; + /* It would be tempting to look for "\n[__exit + 0x8]\n" + but that requires loading symbols with "yc i" and even if + we did do that we don't know that the file has symbols. */ + static char exitmsg[] = "\n@????????I JMPTI GR121,LR0"; + char *bp = bpt; + char *ep = exitmsg; + + /* Large enough for either sizeof (bpt) or sizeof (exitmsg) chars. */ + char swallowed[50]; + /* Current position in swallowed. */ + char *swallowed_p = swallowed; + + int ch; + int ch_handled; + + int old_timeout = timeout; + + WSETEXIT ((*status), 0); + + if (need_artificial_trap != 0) + { + WSETSTOP ((*status), SIGTRAP); + need_artificial_trap--; + return 0; + } + + timeout = 0; /* Don't time out -- user program is running. */ + while (1) + { + ch_handled = 0; + ch = readchar (); + if (ch == *bp) + { + bp++; + if (*bp == '\0') + break; + ch_handled = 1; + + *swallowed_p++ = ch; + } + else + bp = bpt; + + if (ch == *ep || *ep == '?') + { + ep++; + if (*ep == '\0') + break; + + if (!ch_handled) + *swallowed_p++ = ch; + ch_handled = 1; + } + else + ep = exitmsg; + + if (!ch_handled) + { + char *p; + + /* Print out any characters which have been swallowed. */ + for (p = swallowed; p < swallowed_p; ++p) + putc (*p, stdout); + swallowed_p = swallowed; + + putc (ch, stdout); + } + } + expect_prompt (); + if (*bp== '\0') + WSETSTOP ((*status), SIGTRAP); + else + WSETEXIT ((*status), 0); + timeout = old_timeout; + + return 0; +} + +/* Return the name of register number REGNO + in the form input and output by EBMON. + + Returns a pointer to a static buffer containing the answer. */ +static char * +get_reg_name (regno) + int regno; +{ + static char buf[80]; + if (regno >= GR96_REGNUM && regno < GR96_REGNUM + 32) + sprintf (buf, "GR%03d", regno - GR96_REGNUM + 96); + else if (regno >= LR0_REGNUM && regno < LR0_REGNUM + 128) + sprintf (buf, "LR%03d", regno - LR0_REGNUM); + else if (regno == Q_REGNUM) + strcpy (buf, "SR131"); + else if (regno >= BP_REGNUM && regno <= CR_REGNUM) + sprintf (buf, "SR%03d", regno - BP_REGNUM + 133); + else if (regno == ALU_REGNUM) + strcpy (buf, "SR132"); + else if (regno >= IPC_REGNUM && regno <= IPB_REGNUM) + sprintf (buf, "SR%03d", regno - IPC_REGNUM + 128); + else if (regno >= VAB_REGNUM && regno <= LRU_REGNUM) + sprintf (buf, "SR%03d", regno - VAB_REGNUM); + else if (regno == GR1_REGNUM) + strcpy (buf, "GR001"); + return buf; +} + +/* Read the remote registers into the block REGS. */ + +static void +eb_fetch_registers () +{ + int reg_index; + int regnum_index; + char tempbuf[10]; + int i; + +#if 0 + /* This should not be necessary, because one is supposed to read the + registers only when the inferior is stopped (at least with + ptrace() and why not make it the same for remote?). */ + /* ^A is the "normal character" used to make sure we are talking to EBMON + and not to the program being debugged. */ + write (eb_desc, "\001\n"); + expect_prompt (); +#endif + + write (eb_desc, "dw gr96,gr127\n", 14); + for (reg_index = 96, regnum_index = GR96_REGNUM; + reg_index < 128; + reg_index += 4, regnum_index += 4) + { + sprintf (tempbuf, "GR%03d ", reg_index); + expect (tempbuf); + get_hex_regs (4, regnum_index); + expect ("\n"); + } + + for (i = 0; i < 128; i += 32) + { + /* The PC has a tendency to hang if we get these + all in one fell swoop ("dw lr0,lr127"). */ + sprintf (tempbuf, "dw lr%d\n", i); + write (eb_desc, tempbuf, strlen (tempbuf)); + for (reg_index = i, regnum_index = LR0_REGNUM + i; + reg_index < i + 32; + reg_index += 4, regnum_index += 4) + { + sprintf (tempbuf, "LR%03d ", reg_index); + expect (tempbuf); + get_hex_regs (4, regnum_index); + expect ("\n"); + } + } + + write (eb_desc, "dw sr133,sr133\n", 15); + expect ("SR133 "); + get_hex_regs (1, BP_REGNUM); + expect ("\n"); + + write (eb_desc, "dw sr134,sr134\n", 15); + expect ("SR134 "); + get_hex_regs (1, FC_REGNUM); + expect ("\n"); + + write (eb_desc, "dw sr135,sr135\n", 15); + expect ("SR135 "); + get_hex_regs (1, CR_REGNUM); + expect ("\n"); + + write (eb_desc, "dw sr131,sr131\n", 15); + expect ("SR131 "); + get_hex_regs (1, Q_REGNUM); + expect ("\n"); + + write (eb_desc, "dw sr0,sr14\n", 12); + for (reg_index = 0, regnum_index = VAB_REGNUM; + regnum_index <= LRU_REGNUM; + regnum_index += 4, reg_index += 4) + { + sprintf (tempbuf, "SR%03d ", reg_index); + expect (tempbuf); + get_hex_regs (reg_index == 12 ? 3 : 4, regnum_index); + expect ("\n"); + } + + /* There doesn't seem to be any way to get these. */ + { + int val = -1; + supply_register (FPE_REGNUM, &val); + supply_register (INT_REGNUM, &val); + supply_register (FPS_REGNUM, &val); + supply_register (EXO_REGNUM, &val); + } + + write (eb_desc, "dw gr1,gr1\n", 11); + expect ("GR001 "); + get_hex_regs (1, GR1_REGNUM); + expect_prompt (); +} + +/* Fetch register REGNO, or all registers if REGNO is -1. + Returns errno value. */ +void +eb_fetch_register (regno) + int regno; +{ + if (regno == -1) + eb_fetch_registers (); + else + { + char *name = get_reg_name (regno); + fprintf (eb_stream, "dw %s,%s\n", name, name); + expect (name); + expect (" "); + get_hex_regs (1, regno); + expect_prompt (); + } + return; +} + +/* Store the remote registers from the contents of the block REGS. */ + +static void +eb_store_registers () +{ + int i, j; + fprintf (eb_stream, "s gr1,%x\n", read_register (GR1_REGNUM)); + expect_prompt (); + + for (j = 0; j < 32; j += 16) + { + fprintf (eb_stream, "s gr%d,", j + 96); + for (i = 0; i < 15; ++i) + fprintf (eb_stream, "%x,", read_register (GR96_REGNUM + j + i)); + fprintf (eb_stream, "%x\n", read_register (GR96_REGNUM + j + 15)); + expect_prompt (); + } + + for (j = 0; j < 128; j += 16) + { + fprintf (eb_stream, "s lr%d,", j); + for (i = 0; i < 15; ++i) + fprintf (eb_stream, "%x,", read_register (LR0_REGNUM + j + i)); + fprintf (eb_stream, "%x\n", read_register (LR0_REGNUM + j + 15)); + expect_prompt (); + } + + fprintf (eb_stream, "s sr133,%x,%x,%x\n", read_register (BP_REGNUM), + read_register (FC_REGNUM), read_register (CR_REGNUM)); + expect_prompt (); + fprintf (eb_stream, "s sr131,%x\n", read_register (Q_REGNUM)); + expect_prompt (); + fprintf (eb_stream, "s sr0,"); + for (i = 0; i < 11; ++i) + fprintf (eb_stream, "%x,", read_register (VAB_REGNUM + i)); + fprintf (eb_stream, "%x\n", read_register (VAB_REGNUM + 11)); + expect_prompt (); +} + +/* Store register REGNO, or all if REGNO == 0. + Return errno value. */ +int +eb_store_register (regno) + int regno; +{ + if (regno == -1) + eb_store_registers (); + else + { + char *name = get_reg_name (regno); + fprintf (eb_stream, "s %s,%x\n", name, read_register (regno)); + /* Setting GR1 changes the numbers of all the locals, so + invalidate the register cache. Do this *after* calling + read_register, because we want read_register to return the + value that write_register has just stuffed into the registers + array, not the value of the register fetched from the + inferior. */ + if (regno == GR1_REGNUM) + registers_changed (); + expect_prompt (); + } + return 0; +} + +/* Get ready to modify the registers array. On machines which store + individual registers, this doesn't need to do anything. On machines + which store all the registers in one fell swoop, this makes sure + that registers contains all the registers from the program being + debugged. */ + +void +eb_prepare_to_store () +{ + /* Do nothing, since we can store individual regs */ +} + + +/* FIXME-someday! Merge these two. */ +int +eb_xfer_inferior_memory (memaddr, myaddr, len, write, target) + CORE_ADDR memaddr; + char *myaddr; + int len; + int write; + struct target_ops *target; /* ignored */ +{ + if (write) + return eb_write_inferior_memory (memaddr, myaddr, len); + else + return eb_read_inferior_memory (memaddr, myaddr, len); +} + +void +eb_files_info () +{ + printf ("\tAttached to %s at %d baud and running program %s.\n", + dev_name, baudrate, prog_name); +} + +/* Copy LEN bytes of data from debugger memory at MYADDR + to inferior's memory at MEMADDR. Returns length moved. */ +int +eb_write_inferior_memory (memaddr, myaddr, len) + CORE_ADDR memaddr; + char *myaddr; + int len; +{ + int i; + + for (i = 0; i < len; i++) + { + if ((i % 16) == 0) + fprintf (eb_stream, "sb %x,", memaddr + i); + if ((i % 16) == 15 || i == len - 1) + { + fprintf (eb_stream, "%x\n", ((unsigned char *)myaddr)[i]); + expect_prompt (); + } + else + fprintf (eb_stream, "%x,", ((unsigned char *)myaddr)[i]); + } + return len; +} + +/* Read LEN bytes from inferior memory at MEMADDR. Put the result + at debugger address MYADDR. Returns length moved. */ +int +eb_read_inferior_memory(memaddr, myaddr, len) + CORE_ADDR memaddr; + char *myaddr; + int len; +{ + int i; + + /* Number of bytes read so far. */ + int count; + + /* Starting address of this pass. */ + unsigned long startaddr; + + /* Number of bytes to read in this pass. */ + int len_this_pass; + + /* Note that this code works correctly if startaddr is just less + than UINT_MAX (well, really CORE_ADDR_MAX if there was such a + thing). That is, something like + eb_read_bytes (CORE_ADDR_MAX - 4, foo, 4) + works--it never adds len to memaddr and gets 0. */ + /* However, something like + eb_read_bytes (CORE_ADDR_MAX - 3, foo, 4) + doesn't need to work. Detect it and give up if there's an attempt + to do that. */ + if (((memaddr - 1) + len) < memaddr) { + errno = EIO; + return 0; + } + + startaddr = memaddr; + count = 0; + while (count < len) + { + len_this_pass = 16; + if ((startaddr % 16) != 0) + len_this_pass -= startaddr % 16; + if (len_this_pass > (len - count)) + len_this_pass = (len - count); + + fprintf (eb_stream, "db %x,%x\n", startaddr, + (startaddr - 1) + len_this_pass); + expect ("\n"); + + /* Look for 8 hex digits. */ + i = 0; + while (1) + { + if (isxdigit (readchar ())) + ++i; + else + { + expect_prompt (); + error ("Hex digit expected from remote system."); + } + if (i >= 8) + break; + } + + expect (" "); + + for (i = 0; i < len_this_pass; i++) + get_hex_byte (&myaddr[count++]); + + expect_prompt (); + + startaddr += len_this_pass; + } + return len; +} + +static void +eb_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 +eb_mourn_inferior () +{ + remove_breakpoints (); + generic_mourn_inferior (); /* Do all the proper things now */ +} +/* Define the target subroutine names */ + +struct target_ops eb_ops = { + "amd-eb", "Remote serial AMD EBMON target", + "Use a remote computer running EBMON connected by a serial line.\n\ +Arguments are the name of the device for the serial line,\n\ +the speed to connect at in bits per second, and the filename of the\n\ +executable as it exists on the remote computer. For example,\n\ + target amd-eb /dev/ttya 9600 demo", + eb_open, eb_close, + 0, eb_detach, eb_resume, eb_wait, + eb_fetch_register, eb_store_register, + eb_prepare_to_store, 0, 0, /* conv_to, conv_from */ + eb_xfer_inferior_memory, eb_files_info, + 0, 0, /* Breakpoints */ + 0, 0, 0, 0, 0, /* Terminal handling */ + eb_kill, + 0, /* load */ + 0, /* lookup_symbol */ + eb_create_inferior, + eb_mourn_inferior, + process_stratum, 0, /* next */ + 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ + 0, 0, /* Section pointers */ + OPS_MAGIC, /* Always the last thing */ +}; + +void +_initialize_remote_eb () +{ + add_target (&eb_ops); +} |