-/* Cadillac interface routines.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#include "defs.h"
-#include "symtab.h"
-#include "inferior.h"
-#include "command.h"
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/param.h>
-#include <connection.h>
-#include <genericreq.h>
-#include <debuggerreq.h>
-#include <debuggerconn.h>
-#include <ttyconn.h>
-#include <varargs.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <sys/filio.h>
-#include <setjmp.h>
-#include <signal.h>
-#include <sys/errno.h>
-#include <termios.h>
-#include <strings.h>
-
-/* Connection block for debugger<=>kernel communications. */
-static Connection *conn = 0;
-
-/* fd for our socket to the kernel. */
-static int kerfd;
-
-/* The kernel's ID for this instance of the program. */
-static int program_id;
-
-static int instance_id;
-
-/* The fd for the pty associated with the inferior. */
-static int inferior_pty = -1;
-static int inferior_tty = -1;
-
-static int has_run = 0;
-
-extern int cadillac;
-
-char **pprompt; /* Pointer to pointer to prompt */
-\f
-static void
-prompt()
-{
- fputs_filtered(*pprompt, stdout);
-}
-
-/* This routine redirects the output of fputs_filtered to the kernel so that
- the user can see what's going on in his debugger window. */
-
-void
-cadillac_fputs(ptr)
- char *ptr;
-{
- if (conn)
- CVWriteTranscriptInfo (conn, instance_id, ptr);
- else
- fputs (ptr, stdout);
-}
-
-/* Copy all data from the pty to the kernel. */
-
-static void
-pty_to_kernel()
-{
- CTtyRequest *req;
- char buf[1024];
- int cc;
-
- while (1)
- {
- cc = read(inferior_pty, buf, sizeof(buf));
-
- if (cc == 0
- || (cc < 0
- && errno == EWOULDBLOCK))
- break;
-
- if (cc < 0)
- {
- close(inferior_pty);
- inferior_pty = -1;
- perror("pty read error");
- break;
- }
-
- req = CWriteTtyRequest(conn, TextIORType);
- CWriteVstringLen(conn, buf, cc);
- CWriteLength(conn);
- }
- CWriteRequestBuffer(conn);
-}
-
-/* Copy data from the kernel to the pty. */
-
-static void
-kernel_to_pty(data, len)
- char *data;
- int len;
-{
- int cc;
-
- cc = write(inferior_pty, data, len);
-
- if (cc != len)
- {
- if (cc < 0)
- {
- close(inferior_pty);
- inferior_pty = -1;
- perror("pty write error");
- return;
- }
- printf("Couldn't write all the data to the pty, wanted %d, got %d\n",
- len, cc);
- }
-}
-
-/* Tell the kernel where we are in the program, and what the stack looks like.
- */
-
-static void
-send_status()
-{
- static int linecount = 48;
- struct symtab_and_line sal;
- struct symbol *symbol;
- char *funcname, *filename;
- static int foo = 0;
- static int sent_prog_inst = 0;
-
- if (!has_run)
- return;
-
- if (inferior_pid == 0) /* target has died */
- {
- CVWriteProgramTerminatedInfo(conn,
- instance_id,
- ""
- );
- return;
- }
-
- sal = find_pc_line(stop_pc, 0);
- symbol = find_pc_function(stop_pc);
-
- funcname = symbol ? symbol->name : "";
- filename = sal.symtab ? sal.symtab->filename : "";
-
- if (!sent_prog_inst)
- {
- sent_prog_inst = 1;
- CVWriteProgramInstanceInfo(conn,
- program_id,
- instance_id,
- "", /* hostname */
- "", /* arglist */
- ""
- );
- }
-
- CVWriteStackSizeInfo(conn,
- instance_id,
- 1, /* XXX - frame depth */
- CInnerFrameIs0,
- foo++ ? 1 : 0, /* XXX - frame diff */
- ""
- );
-
- CVWriteStackFrameInfo(conn,
- instance_id,
- sal.line,
- CFileLinePos,
- 0, /* XXX - frame # */
- funcname,
- filename,
- "" /* XXX ? transcript */
- );
-
- CVWriteProgramStoppedInfo(conn,
- instance_id,
- 0, /* XXX - breakpoint # or signal # */
- CDebuggerCommand,
- funcname,
- "" /* XXX ? transcript */
- );
-}
-
-/* Tell the kernel that the target is now running. */
-
-static void
-go_busy()
-{
- CVWriteProgramBusyInfo(conn,
- instance_id,
- ""); /* XXX ? transcript */
- CWriteRequestBuffer(conn); /* Must take place synchronusly! */
-}
-
-/* This wrapper routine is needed because execute_command modifies the command
- string that it's given. It also echos the commands. */
-
-static void
-execute_command_1(va_alist)
- va_dcl
-{
- char buf[100]; /* XXX - make buf dynamic! */
- char *cmd;
- va_list args;
-
- va_start(args);
-
- cmd = va_arg(args, char *);
-
- vsprintf(buf, cmd, args);
-
- printf_filtered("%s\n", buf);
- execute_command(buf, 1);
-
- va_end(args);
-}
-
-#ifdef KERNEL_RECORD
-FILE *kerout;
-
-static int
-kernel_record(fd, ptr, num)
- int fd, num;
- char *ptr;
-
-{
- fwrite(ptr, num, 1, kerout);
- fflush(kerout);
- return write(fd, ptr, num);
-}
-#endif
-
-void
-cadillac_condition_breakpoint(b)
- struct breakpoint *b;
-{
- CVWriteBreakConditionInfo(conn,
- instance_id,
- b->number,
- b->cond_string ? b->cond_string : "",
- "" /* transcript */
- );
-}
-
-void
-cadillac_commands_breakpoint(b)
- struct breakpoint *b;
-{
- struct command_line *l;
-
- CVWriteBreakCommandBegInfo(conn,
- instance_id,
- b->number,
- ""); /* transcript */
-
- for (l = b->commands; l; l = l->next)
- CVWriteBreakCommandEntryInfo(conn,
- instance_id,
- l->line,
- ""); /* transcript */
-
- CVWriteBreakCommandEndInfo(conn,
- instance_id,
- ""); /* transcript */
-}
-
-static void
-breakpoint_notify(b, action)
- struct breakpoint *b;
- int action;
-{
- struct symtab *s;
- struct symbol *s1;
- char *funcname = "", *filename = "", *included_in_filename = "";
-
- if (b->type != bp_breakpoint)
- return;
-
- s = b->symtab;
-
- if (s)
- {
- filename = s->filename;
- s1 = find_pc_function(b->address);
- if (s1)
- funcname = SYMBOL_NAME(s1);
- }
-
- CVWriteBreakpointInfo (conn,
- instance_id,
- b->number,
- b->line_number,
- CFileLinePos,
- CBreakOnInstrAccess,
- action,
- b->ignore_count,
- funcname,
- filename,
- "", /* included_in_filename */
- "" /* transcript */
- );
-
- if (b->commands)
- cadillac_commands_breakpoint(b);
-}
-
-void
-cadillac_create_breakpoint(b)
- struct breakpoint *b;
-{
- breakpoint_notify(b, CEnableBreakpoint);
-}
-
-void
-cadillac_delete_breakpoint(b)
- struct breakpoint *b;
-{
- breakpoint_notify(b, CDeleteBreakpoint);
-}
-
-void
-cadillac_enable_breakpoint(b)
- struct breakpoint *b;
-{
- breakpoint_notify(b, CEnableBreakpoint);
-}
-
-void
-cadillac_disable_breakpoint(b)
- struct breakpoint *b;
-{
- breakpoint_notify(b, CDisableBreakpoint);
-}
-
-void
-cadillac_ignore_breakpoint(b)
- struct breakpoint *b;
-{
- breakpoint_notify(b, CBreakAttrUnchanged);
-}
-
-static int command_line_length = 0;
-static char *command_line_text = 0;
-
-int
-cadillac_reading()
-{
- if (command_line_text)
- return 1;
- else
- return 0;
-}
-
-char *
-cadillac_command_line_input()
-{
- char *p;
-
- if (command_line_length <= 0)
- return (char *)NULL;
-
- p = command_line_text;
-
- while (command_line_length-- > 0)
- {
- if (*command_line_text == '\n')
- {
- *command_line_text = '\000';
- command_line_text++;
- break;
- }
- command_line_text++;
- }
-
- return p;
-}
-
-/* Open up a pty and its associated tty. Return the fd of the tty. */
-
-char *
-cadillac_getpty()
-{
- int n, ptyfd, ttyfd;
- static char dev[30];
- struct stat statbuf;
- struct termios termios;
-
-#define HIGHPTY (('z' - 'p') * 16 - 1)
-
- if (inferior_pty >= 0) /* Only do this once */
- return dev;
-
- for (n = 0; n <= HIGHPTY; n++)
- {
- sprintf(dev, "/dev/pty%c%x", n/16 + 'p', n%16);
- if (stat(dev, &statbuf))
- break;
- ptyfd = open(dev, O_RDWR);
- if (ptyfd < 0)
- continue;
- sprintf(dev, "/dev/tty%c%x", n/16 + 'p', n%16);
- ttyfd = open(dev, O_RDWR);
- if (ttyfd < 0) {close(ptyfd); continue;}
-
- /* Setup pty for non-blocking I/O. Also make it give us a SIGIO when
- there's data available. */
-
- n = fcntl(ptyfd, F_GETFL, 0);
- fcntl(ptyfd, F_SETFL, n|FNDELAY|FASYNC);
- fcntl(ptyfd, F_SETOWN, getpid());
-
- tcgetattr(ttyfd, &termios);
- termios.c_oflag &= ~OPOST; /* No post-processing */
- tcsetattr(ttyfd, TCSANOW, &termios);
-
- inferior_pty = ptyfd;
- inferior_tty = ttyfd;
- return dev;
- }
-
- error ("getpty: can't get a pty\n");
-}
-\f
-/* Examine a protocol packet from the driver. */
-
-static int
-kernel_dispatch(interrupt)
- int interrupt; /* Non-zero means we are at interrupt level
- and can only do a few commands. */
-{
- register CHeader *head;
-
- head = (CHeader *)CPeekNextRequest (conn);
- if (head == NULL)
- {
- fprintf (stderr, "EOF on kernel read!\n");
- exit (1);
- }
-
- if (interrupt)
- switch (head->reqType)
- {
- case KillProgramRType:
- case TextIORType:
- case StopRType:
- break;
- default:
- return;
- }
-
- if (head->reqType < LastTtyRequestRType)
- {
- CTtyRequest* req = CReadTtyRequest (conn);
- switch (req->head.reqType)
- {
- case AcceptConnectionRType:
- /* Tell the rest of the world that cadillac is now set up */
- CSkipRequest (conn);
- break;
-
- case RefuseConnectionRType:
- fprintf (stderr, "Debugger connection refused\n");
- exit (1);
-
- case KillProgramRType:
- exit (0);
-
- case TextIORType:
- {
- char *p;
- ReqLen len;
-
- p = CGetVstring(conn, &len);
- kernel_to_pty(p, len);
- }
- break;
- default:
- fprintf(stderr, "Unknown request type = %d\n",
- req->head.reqType);
- break;
- }
- }
- else
- {
- CVDebuggerRequest *req = CVReadDebuggerRequest (conn);
- if (!req)
- {
- fprintf (stderr, "CVReadDebuggerRequest returned NULL, type = %d\n",
- head->reqType);
- exit(1);
- }
-
- switch (req->head.request->reqType)
- {
- case OpenProgramInstanceRType:
- {
- char *arglist, buf[100]; /* XXX - Make buf dynamic! */
- int arglen;
- /* XXX - should notice when program_id changes */
- arglist = req->openProgramInstance.progArglist.text;
- arglen = req->openProgramInstance.progArglist.byteLen;
-
- execute_command_1("break main");
- execute_command_1("enable delete $bpnum");
- if (arglist)
- {
- execute_command_1("set args %.*s", arglen, arglist);
- }
- execute_command_1("run");
- }
- break;
- case QuitDebuggerRType:
- exit (0);
- case RunRType:
- if (req->run.request->useArglist == CNewArglist)
- {
- execute_command_1("set args %.*s",
- req->run.progArglist.byteLen,
- req->run.progArglist.text);
- }
- execute_command_1("run");
- break;
- case ContinueRType:
- execute_command_1("continue");
- break;
- case StepRType:
- execute_command_1("step %d", req->step.request->stepCount);
- break;
- case NextRType:
- execute_command_1("next %d", req->next.request->nextCount);
- break;
- case ChangeStackFrameRType:
- switch (req->changeStackFrame.request->frameMovement)
- {
- case CToCurrentStackFrame:
- execute_command_1("frame %d",
- req->changeStackFrame.request->frameNo);
- break;
- case CToInnerStackFrame:
- execute_command_1("down %d",
- req->changeStackFrame.request->frameNo);
- break;
- case CToOuterStackFrame:
- execute_command_1("up %d",
- req->changeStackFrame.request->frameNo);
- break;
- case CToAbsoluteStackFrame:
- printf_filtered("ChangeStackFrame ToAbsolute\n");
- break;
- }
- break;
- case BackTraceRType:
- /* XXX - deal with limit??? */
- execute_command_1("backtrace");
- break;
- case FinishRType:
- execute_command_1("finish");
- break;
- case TerminateProgramRType:
- execute_command_1("kill");
- break;
- case NewBreakpointRType:
- {
- char *tail;
- int skipped;
-
- tail = rindex(req->newBreakpoint.fileName.text, '/');
- if (!tail)
- tail = req->newBreakpoint.fileName.text;
- else
- tail++;
- skipped = tail - req->newBreakpoint.fileName.text;
- execute_command_1("break %.*s:%d",
- req->newBreakpoint.fileName.byteLen - skipped,
- tail,
- req->newBreakpoint.request->fileLinePos);
- }
- break;
- case StopRType:
- {
- extern int pgrp_inferior;
- killpg(pgrp_inferior, SIGINT);
- }
- break;
- case UserInputRType:
- {
- char *text;
- long len;
-
- /* XXX - should really break command up into seperate lines
- and spoon-feed it to execute_command */
-
- text = req->userInput.userInput.text;
- len = req->userInput.userInput.byteLen;
-
- if (text[len-1] == '\n') text[len-1] = '\000';
- execute_command (text);
- break;
- }
- case ChangeBreakpointRType:
- switch (req->changeBreakpoint.request->breakpointAttr)
- {
- case CEnableBreakpoint:
- execute_command_1("enable %d",
- req->changeBreakpoint.request->breakpointId);
- break;
- case CDisableBreakpoint:
- execute_command_1("disable %d",
- req->changeBreakpoint.request->breakpointId);
- break;
- case CDeleteBreakpoint:
- execute_command_1("delete %d",
- req->changeBreakpoint.request->breakpointId);
- break;
- case CBreakAttrUnchanged:
- execute_command_1("ignore %d %d",
- req->changeBreakpoint.request->breakpointId,
- req->changeBreakpoint.request->ignoreCount);
- break;
- default:
- printf_filtered("Got to ChangeBreakpoint\n");
- printf_filtered(" breakpointId = %d\n",
- req->changeBreakpoint.request->breakpointId);
- printf_filtered(" breakpointType = %d\n",
- req->changeBreakpoint.request->breakpointType);
- printf_filtered(" breakpointAttr = %d\n",
- req->changeBreakpoint.request->breakpointAttr);
- printf_filtered(" ignoreCount = %d\n",
- req->changeBreakpoint.request->ignoreCount);
- break;
- }
- break;
- case BreakConditionRType:
- execute_command_1("condition %d %.*s",
- req->breakCondition.request->breakpointId,
- req->breakCondition.condition.byteLen,
- req->breakCondition.condition.text);
- break;
- case BreakCommandsRType:
- /* Put pointers to where cadillac_command_line_input() can find
- them. */
- command_line_length = req->breakCommands.commands.byteLen;
- command_line_text = req->breakCommands.commands.text;
- execute_command_1("commands %d",
- req->breakCommands.request->breakpointId);
- command_line_text = (char *)NULL;
- command_line_length = 0;
- break;
- default:
- fprintf(stderr, "Unknown request type = %d\n",
- req->head.request->reqType);
- break;
- }
- free (req); /* Should probably call CVFreeDebuggerRequest() here, but
- can't do so if interrupt level has mucked with req->
- request. CVFreeDebuggerRequest() only ends up calling
- free() anyway! */
- }
-}
-\f
-#define KERNEL_EVENT 1
-#define PTY_EVENT 2
-
-/* Return a bitmask indicating if the kernel or the pty did something
- interesting. Set poll to non-zero if you don't want to wait. */
-
-static int
-wait_for_events(poll)
- int poll;
-{
- fd_set readfds;
- int numfds;
- int eventmask = 0;
- static struct timeval tv = {0};
-
- /* Output all pending requests. */
- CWriteRequestBuffer(conn);
-
- /* Wait till there's some activity from the kernel or the pty. */
- do
- {
- FD_ZERO(&readfds);
- FD_SET(kerfd, &readfds);
- if (inferior_pty > 0)
- FD_SET(inferior_pty, &readfds);
- if (poll)
- numfds = select(sizeof(readfds)*8, &readfds, 0, 0, &tv);
- else
- numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0);
- }
- while (numfds <= 0 && !poll);
-
- if (FD_ISSET(inferior_pty, &readfds))
- eventmask |= PTY_EVENT;
-
- if (FD_ISSET(kerfd, &readfds))
- eventmask |= KERNEL_EVENT;
-
- return eventmask;
-}
-\f
-/* Establish contact with the kernel. */
-
-void
-cadillac_initialize(cadillac_id, execarg)
- char *cadillac_id;
- char *execarg;
-{
- CTtyRequest *req;
- char *ctmp;
- extern long strtol(char *str, char **ptr, int base);
- char pathname[MAXPATHLEN];
- int n;
-
- if (!execarg) execarg = "";
-
- printf("gdb-debugger pid=%d\n", getpid()); /* XXX - debugging only */
-
- /* First establish the connection with the kernel. */
-
- kerfd = COpenClientSocket(NULL);
- if (kerfd < 0) {
- printf("COpenClientSocket() failed\n");
- exit(1);
- }
-
- /* Setup for I/O interrupts when appropriate. */
-
- n = fcntl(kerfd, F_GETFL, 0);
- fcntl(kerfd, F_SETFL, n|FASYNC);
- fcntl(kerfd, F_SETOWN, getpid());
-
- /* Setup connection buffering. */
-
- CSetSocketBufferSize (kerfd, 12000);
-
- /* Generate a new connection control block. */
-
- conn = NewConnection (0, kerfd, kerfd);
- if (!conn) {
- printf("NewConnection() failed\n");
- exit(1);
- }
-
-#ifdef KERNEL_RECORD
- kerout = fopen("kernel.output", "+w");
-
- CReadWriteHooks(conn, conn->previewMethod, conn->readMethod, kernel_record);
-#endif
-
- /* Tell the kernel that we are the "debugger". */
-
- req = CWriteTtyRequest (conn, QueryConnectionRType);
- req->generic.queryconnection.major = 0;
- req->generic.queryconnection.minor = 0;
- req->generic.queryconnection.cadillacId1=strtol(cadillac_id, &ctmp, 16);
- req->generic.queryconnection.cadillacId2 = strtol(++ctmp, NULL, 16);
- req->generic.queryconnection.nProtocols = 1;
- CWriteProtocol (conn, 0, 0, "debugger");
- CWriteLength (conn);
-
- /* Tell the kernel that we are actually running. */
-
- /* KROCK ALERT!!! The kernel doesn't really care about the arguments to
- the program at all! It only cares that argument 7 be the name of the
- target program. So, we just fill in the rest of the slots with
- padding. I hope the kernel never cares about this! */
-
- req = CWriteTtyRequest (conn, RunningProgramRType);
- req->runningprogram.argc = 8;
- getwd (pathname);
- CWriteVstring0 (conn, pathname);
-
- CWriteVstring0 (conn, "0");
- CWriteVstring0 (conn, "1");
- CWriteVstring0 (conn, "2");
- CWriteVstring0 (conn, "3");
- CWriteVstring0 (conn, "4");
- CWriteVstring0 (conn, "5");
- CWriteVstring0 (conn, "6");
- CWriteVstring0 (conn, execarg);
- CWriteLength (conn);
-
- /* Tell the kernel our PID and all that */
-
- program_id = 1;
- CVWriteDebugProgramInfo(conn,
- getpid(),
- program_id,
- execarg,
- "");
-
- /* Tell the rest of the world that Cadillac is now set up. */
- cadillac = 1;
-}
-
-/* This is called from execute_command, and provides a wrapper around
- various command routines in a place where both protocol messages and
- user input both flow through.
-*/
-
-void
-cadillac_call_command(cmdblk, arg, from_tty)
- struct cmd_list_element *cmdblk;
- char *arg;
- int from_tty;
-{
- if (cmdblk->class == class_run)
- {
- go_busy();
- has_run = 1;
- (*cmdblk->function.cfunc)(arg, from_tty);
- send_status();
- }
- else
- (*cmdblk->function.cfunc)(arg, from_tty);
-
- prompt();
-}
-
-void
-cadillac_new_process()
-{
- instance_id = inferior_pid;
-}
-
-static void
-iosig()
-{
- while (1)
- {
- int eventmask;
-
- eventmask = wait_for_events(1);
-
- if (eventmask == 0)
- return;
-
- if (eventmask & PTY_EVENT)
- pty_to_kernel();
-
- if (eventmask & KERNEL_EVENT)
- kernel_dispatch(1);
- }
-}
-
-int
-cadillac_wait(status)
- int *status;
-{
- int pid;
-
- signal(SIGIO, iosig);
-
- pid = wait(status);
-
- signal(SIGIO, SIG_DFL);
- return pid;
-}
-
-static void
-null_routine(arg)
- int arg;
-{
-}
-
-/* All requests from the Cadillac kernel eventually end up here. */
-
-void
-cadillac_main_loop(pp)
- char **pp;
-{
- CTtyRequest *req;
- struct cleanup *old_chain;
-
- pprompt = pp;
-
-/* We will come thru here any time there is an error, so send status if
- necessary. */
-
- send_status();
-
- prompt();
-
- /* The actual event loop! */
-
- while (1)
- {
- int eventmask;
-
- eventmask = wait_for_events(0);
-
- if (eventmask & PTY_EVENT)
- pty_to_kernel();
-
- if (eventmask & KERNEL_EVENT)
- {
- old_chain = make_cleanup(null_routine, 0);
- kernel_dispatch(0);
- bpstat_do_actions(&stop_bpstat);
- do_cleanups(old_chain);
- }
- }
-}
projects / deliverable / binutils-gdb.git / blobdiff