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- /* this ver hacked up by jrd for atari st */
-
- /* Low level interface to ptrace, for GDB when running under Unix.
- Copyright (C) 1986, 1987 Free Software Foundation, Inc.
-
- 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!
- */
-
- #include "defs.h"
- #include "param.h"
- #include "frame.h"
- #include "inferior.h"
-
- #include <stdio.h>
- #include <types.h>
- #include <file.h>
- #include <param.h>
- /* #include <dir.h> */
- #include <signal.h>
- #include <ioctl.h>
-
- #define TERMINAL struct sgttyb
-
- extern int errno;
-
- /* Nonzero if we are debugging an attached outside process
- rather than an inferior. */
-
- static int attach_flag;
-
-
- /* Record terminal status separately for debugger and inferior. */
-
- static TERMINAL sg_inferior;
- static TERMINAL sg_ours;
- static int tflags_inferior;
- static int tflags_ours;
-
- #ifdef TIOCGLTC
- static struct tchars tc_inferior;
- static struct tchars tc_ours;
- static struct ltchars ltc_inferior;
- static struct ltchars ltc_ours;
- static int lmode_inferior;
- static int lmode_ours;
- #endif /* TIOCGLTC */
-
- #ifdef TIOCGPGRP
- static int pgrp_inferior;
- static int pgrp_ours;
- #else
- static int (*sigint_ours) ();
- static int (*sigquit_ours) ();
- #endif /* TIOCGPGRP */
-
- /* Copy of inferior_io_terminal when inferior was last started. */
- static char *inferior_thisrun_terminal;
-
- static void terminal_ours_1 ();
-
- /* Nonzero if our terminal settings are in effect.
- Zero if the inferior's settings are in effect. */
- static int terminal_is_ours;
-
- /* Initialize the terminal settings we record for the inferior,
- before we actually run the inferior. */
-
- void
- terminal_init_inferior ()
- {
- /*
- if (remote_debugging)
- return;
- */
-
- sg_inferior = sg_ours;
- tflags_inferior = tflags_ours;
-
- #ifdef TIOCGLTC
- tc_inferior = tc_ours;
- ltc_inferior = ltc_ours;
- lmode_inferior = lmode_ours;
- #endif /* TIOCGLTC */
-
- #ifdef TIOCGPGRP
- pgrp_inferior = inferior_pid;
- #endif /* TIOCGPGRP */
-
- terminal_is_ours = 1;
- }
-
- /* Put the inferior's terminal settings into effect.
- This is preparation for starting or resuming the inferior. */
-
- void
- terminal_inferior ()
- {
- /*
- if (remote_debugging)
- return;
- */
-
- if (terminal_is_ours) /* && inferior_thisrun_terminal == 0) */
- {
- /* good grief...
- fcntl (0, F_SETFL, tflags_inferior);
- fcntl (0, F_SETFL, tflags_inferior);
- ioctl (0, TIOCSETN, &sg_inferior);
- */
-
- #ifdef TIOCGLTC
- ioctl (0, TIOCSETC, &tc_inferior);
- ioctl (0, TIOCSLTC, <c_inferior);
- /* ioctl (0, TIOCLSET, &lmode_inferior); ??? */
- #endif /* TIOCGLTC */
-
- #ifdef TIOCGPGRP
- ioctl (0, TIOCSPGRP, &pgrp_inferior);
- #else
- sigint_ours = (signal (SIGINT, SIG_IGN));
- sigquit_ours = (signal (SIGQUIT, SIG_IGN));
- #endif /* TIOCGPGRP */
- }
- terminal_is_ours = 0;
- }
-
- /* Put some of our terminal settings into effect,
- enough to get proper results from our output,
- but do not change into or out of RAW mode
- so that no input is discarded.
-
- After doing this, either terminal_ours or terminal_inferior
- should be called to get back to a normal state of affairs. */
-
- void
- terminal_ours_for_output ()
- {
- /*
- if (remote_debugging)
- return;
- */
-
- terminal_ours_1 (1);
- }
-
- /* Put our terminal settings into effect.
- First record the inferior's terminal settings
- so they can be restored properly later. */
-
- void
- terminal_ours ()
- {
- /*
- if (remote_debugging)
- return;
- */
-
- terminal_ours_1 (0);
- }
-
- static void
- terminal_ours_1 (output_only)
- int output_only;
- {
- #ifdef TIOCGPGRP
- /* Ignore this signal since it will happen when we try to set the pgrp. */
- int (*osigttou) ();
- #endif /* TIOCGPGRP */
-
- if (!terminal_is_ours) /* && inferior_thisrun_terminal == 0) */
- {
- terminal_is_ours = 1;
-
- #ifdef TIOCGPGRP
- osigttou = signal (SIGTTOU, SIG_IGN);
-
- ioctl (0, TIOCGPGRP, &pgrp_inferior);
- ioctl (0, TIOCSPGRP, &pgrp_ours);
-
- signal (SIGTTOU, osigttou);
- #else
- signal (SIGINT, sigint_ours);
- signal (SIGQUIT, sigquit_ours);
- #endif /* TIOCGPGRP */
-
- /* tflags_inferior = fcntl (0, F_GETFL, 0); ??? */
- ioctl (0, TIOCGETP, &sg_inferior);
-
- #ifdef TIOCGLTC
- ioctl (0, TIOCGETC, &tc_inferior);
- ioctl (0, TIOCGLTC, <c_inferior);
- /* ioctl (0, TIOCLGET, &lmode_inferior); ??? */
- #endif /* TIOCGLTC */
- }
-
- #ifdef HAVE_TERMIO
- sg_ours.c_lflag |= ICANON;
- if (output_only && !(sg_inferior.c_lflag & ICANON))
- sg_ours.c_lflag &= ~ICANON;
- #else /* not HAVE_TERMIO */
- sg_ours.sg_flags &= ~RAW & ~CBREAK;
- if (output_only)
- sg_ours.sg_flags |= (RAW | CBREAK) & sg_inferior.sg_flags;
- #endif /* not HAVE_TERMIO */
-
- /* ???
- fcntl (0, F_SETFL, tflags_ours);
- fcntl (0, F_SETFL, tflags_ours);
- ioctl (0, TIOCSETN, &sg_ours);
-
- #ifdef TIOCGLTC
- ioctl (0, TIOCSETC, &tc_ours);
- ioctl (0, TIOCSLTC, <c_ours);
- ioctl (0, TIOCLSET, &lmode_ours);
- #endif /* TIOCGLTC */
-
- #ifdef HAVE_TERMIO
- sg_ours.c_lflag |= ICANON;
- #else /* not HAVE_TERMIO */
- sg_ours.sg_flags &= ~RAW & ~CBREAK;
- #endif /* not HAVE_TERMIO */
- }
-
- static void
- term_status_command ()
- {
- register int i;
-
- /*
- if (remote_debugging)
- {
- printf_filtered ("No terminal status when remote debugging.\n");
- return;
- }
- */
-
- printf_filtered ("Inferior's terminal status (currently saved by GDB):\n");
-
- #ifdef HAVE_TERMIO
-
- printf_filtered ("fcntl flags = 0x%x, c_iflag = 0x%x, c_oflag = 0x%x,\n",
- tflags_inferior, sg_inferior.c_iflag, sg_inferior.c_oflag);
- printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
- sg_inferior.c_cflag, sg_inferior.c_lflag, sg_inferior.c_line);
- printf_filtered ("c_cc: ");
- for (i = 0; (i < NCC); i += 1)
- printf_filtered ("0x%x ", sg_inferior.c_cc[i]);
- printf_filtered ("\n");
-
- #else /* not HAVE_TERMIO */
-
- printf_filtered ("fcntl flags = 0x%x, lmode = 0x%x,\nsgttyb.sg_flags = 0x%x.\n",
- tflags_inferior, lmode_inferior,
- sg_inferior.sg_flags);
- printf_filtered ("tchars: ");
- for (i = 0; i < sizeof (struct tchars); i++)
- printf_filtered ("0x%x ", ((char *)&tc_inferior)[i]);
- printf_filtered ("\n");
- printf_filtered ("ltchars: ");
- for (i = 0; i < sizeof (struct ltchars); i++)
- printf_filtered ("0x%x ", ((char *)<c_inferior)[i]);
-
- #endif /* not HAVE_TERMIO */
- }
-
- static void
- new_tty (ttyname)
- char *ttyname;
- {
- register int tty;
- register int fd;
-
- #if 0
- /* I think it is better not to do this. Then C-z on the GDB terminal
- will still stop the program, while C-z on the data terminal
- will be input. */
-
- /* Disconnect the child process from our controlling terminal. */
- tty = open("/dev/tty", O_RDWR);
- if (tty > 0)
- {
- ioctl(tty, TIOCNOTTY, 0);
- close(tty);
- }
- #endif
- /* Now open the specified new terminal. */
-
- tty = open(ttyname, O_RDWR);
- if (tty == -1)
- _exit(1);
-
- /* who the hell knows...
- dup2(tty, 0);
- dup2(tty, 1);
- dup2(tty, 2);
- */
- close(tty);
- }
-
- /* Start an inferior process and returns its pid.
- ALLARGS is a vector of program-name and args.
- ENV is the environment vector to pass. */
-
- int
- create_inferior (allargs, env)
- char **allargs;
- char **env;
- {
- int pid;
- extern int sys_nerr;
- extern char *sys_errlist[];
- extern int errno;
-
- /* exec is said to fail if the executable is open. */
- close_exec_file ();
-
- #ifdef eunuchs
- /* this cruft left here as reminder of the hard way eunuchs does this. */
- pid = vfork ();
- if (pid < 0)
- perror_with_name ("vfork");
-
- if (pid == 0)
- {
- #ifdef TIOCGPGRP
- /* Run inferior in a separate process group. */
- /* ???
- setpgrp (getpid (), getpid ());
- */
- #endif /* TIOCGPGRP */
-
- inferior_thisrun_terminal = inferior_io_terminal;
- if (inferior_io_terminal != 0)
- new_tty (inferior_io_terminal);
-
- /* Not needed on Sun, at least, and loses there
- because it clobbers the superior. */
- /*??? signal (SIGQUIT, SIG_DFL);
- signal (SIGINT, SIG_DFL); */
-
- ptrace (0);
- execle ("/bin/sh", "sh", "-c", allargs, 0, env);
-
- fprintf_filtered (stderr, "Cannot exec /bin/sh: %s.\n",
- errno < sys_nerr ? sys_errlist[errno] : "unknown error");
- fflush (stderr);
- _exit (0177);
- }
- #else
- /* atari code here */
- pid = st_execle_kludge(allargs, env);
- #endif
- return pid;
- }
-
- /* Kill the inferior process. Make us have no inferior. */
-
- static void
- kill_command ()
- {
- /*
- if (remote_debugging)
- return;
- */
- if (inferior_pid == 0)
- error ("The program is not being run.");
- if (!query ("Kill the inferior process? "))
- error ("Not confirmed.");
- kill_inferior ();
- }
-
- kill_inferior ()
- {
- /*
- if (remote_debugging)
- return;
- */
- if (inferior_pid == 0)
- return;
- /* ptrace (8, inferior_pid, 0, 0);
- wait (0); */
- st_child_exit();
- inferior_died ();
- }
-
- inferior_died ()
- {
- inferior_pid = 0;
- attach_flag = 0;
- mark_breakpoints_out ();
- reopen_exec_file ();
- if (have_core_file_p ())
- set_current_frame (read_register (FP_REGNUM));
- }
-
- /* Resume execution of the inferior process.
- If STEP is nonzero, single-step it.
- If SIGNAL is nonzero, give it that signal. */
-
- void
- resume (step, signal)
- int step;
- int signal;
- {
- errno = 0;
- /*
- if (remote_debugging)
- remote_resume (step, signal);
- else
- */
- {
- /*
- ptrace (step ? 9 : 7, inferior_pid, 1, signal);
- if (errno)
- perror_with_name ("ptrace");
- */
- if (step)
- st_child_single_step();
- else
- st_child_continue();
- }
- }
-
- #ifdef ATTACH_DETACH
-
- /* Start debugging the process whose number is PID. */
-
- attach (pid)
- int pid;
- {
- errno = 0;
- /* meaningless on st...
- ptrace (PTRACE_ATTACH, pid, 0, 0);
- if (errno)
- perror_with_name ("ptrace");
- attach_flag = 1;
- */
- return pid;
- }
-
- /* Stop debugging the process whose number is PID
- and continue it with signal number SIGNAL.
- SIGNAL = 0 means just continue it. */
-
- void
- detach (signal)
- int signal;
- {
- errno = 0;
- /* ditto...
- ptrace (PTRACE_DETACH, inferior_pid, 1, signal);
- if (errno)
- perror_with_name ("ptrace");
- */
- attach_flag = 0;
- }
- #endif /* ATTACH_DETACH */
-
-
- void
- fetch_inferior_registers ()
- {
- register int regno;
- register unsigned int regaddr;
- char buf[MAX_REGISTER_RAW_SIZE];
- register int i;
-
- /* who knows what this is really doing???
- #ifdef UMAX_PTRACE
- unsigned int offset = 0;
- #else
- struct user u;
- unsigned int offset = (char *) &u.u_ar0 - (char *) &u;
- offset = ptrace (3, inferior_pid, offset, 0) - KERNEL_U_ADDR;
- #endif
- */
-
- unsigned int offset = 0;
-
- for (regno = 0; regno < NUM_REGS; regno++)
- {
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
- {
- /*
- *(int *) &buf[i] = ptrace (3, inferior_pid, regaddr, 0);
- */
- *(int *) &buf[0] = st_child_read_register(regaddr);
-
- regaddr += sizeof (int);
- }
- /* fprintf_filtered(stderr, "supplying register %d from buf %X val %X\n",
- regno, buf, *(long * )&buf); */
- supply_register (regno, buf);
- }
- }
-
- /* Store our register values back into the inferior.
- If REGNO is -1, do this for all registers.
- Otherwise, REGNO specifies which register (so we can save time). */
-
- store_inferior_registers (regno)
- int regno;
- {
- register unsigned int regaddr;
- char buf[80];
-
- /* more blecherosity
- #ifdef UMAX_PTRACE
- unsigned int offset = 0;
- #else
- struct user u;
- unsigned int offset = (char *) &u.u_ar0 - (char *) &u;
- offset = ptrace (3, inferior_pid, offset, 0) - KERNEL_U_ADDR;
- #endif
- */
-
- unsigned int offset = 0;
-
- if (regno >= 0)
- {
- regaddr = register_addr (regno, offset);
- errno = 0;
- /*
- ptrace (6, inferior_pid, regaddr, read_register (regno));
- */
- st_child_write_register(regaddr, read_register (regno));
-
- if (errno != 0)
- {
- printf_filtered (buf, "writing register number %d", regno);
- perror_with_name (buf);
- }
- }
- else for (regno = 0; regno < NUM_REGS; regno++)
- {
- regaddr = register_addr (regno, offset);
- errno = 0;
- /*
- ptrace (6, inferior_pid, regaddr, read_register (regno));
- */
- st_child_write_register(regaddr, read_register (regno));
-
- if (errno != 0)
- {
- printf_filtered (buf, "writing register number %d", regno);
- perror_with_name (buf);
- }
- }
- }
-
-
- /* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
- in the NEW_SUN_PTRACE case.
- It ought to be straightforward. But it appears that writing did
- not write the data that I specified. I cannot understand where
- it got the data that it actually did write. */
-
- /* Copy LEN bytes from inferior's memory starting at MEMADDR
- to debugger memory starting at MYADDR. */
-
- read_inferior_memory (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- {
- 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));
-
- /* Read all the longwords */
- for (i = 0; i < count; i++, addr += sizeof (int))
- {
- /* if (remote_debugging)
- buffer[i] = remote_fetch_word (addr);
- else
- */
- /*
- buffer[i] = ptrace (1, inferior_pid, addr, 0);
- */
- buffer[i] = st_child_read_word(addr);
- }
-
- /* Copy appropriate bytes out of the buffer. */
- bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
- }
-
- /* Copy LEN bytes of data from debugger memory at MYADDR
- to inferior's memory at MEMADDR.
- On failure (cannot write the inferior)
- returns the value of errno. */
-
- int
- write_inferior_memory (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- {
- 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));
- extern int errno;
-
- /* Fill start and end extra bytes of buffer with existing memory data. */
-
- /*
- if (remote_debugging)
- buffer[0] = remote_fetch_word (addr);
- else
- */
- /*
- buffer[0] = ptrace (1, inferior_pid, addr, 0);
- */
- buffer[0] = st_child_read_word(addr);
-
- if (count > 1)
- {
- /*
- if (remote_debugging)
- buffer[count - 1]
- = remote_fetch_word (addr + (count - 1) * sizeof (int));
- else
- */
- buffer[count - 1]
- /*
- = ptrace (1, inferior_pid,
- addr + (count - 1) * sizeof (int), 0);
- */
- = st_child_read_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;
- /*
- if (remote_debugging)
- remote_store_word (addr, buffer[i]);
- else
- */
- /*
- ptrace (4, inferior_pid, addr, buffer[i]);
- */
- st_child_write_word(addr, buffer[i]);
- if (errno)
- return errno;
- }
-
- return 0;
- }
-
- /* good grief...
- static void
- try_writing_regs_command ()
- {
- register int i;
- register int value;
- extern int errno;
-
- if (inferior_pid == 0)
- error ("There is no inferior process now.");
-
- for (i = 0; ; i += 2)
- {
- QUIT;
- errno = 0;
- value = ptrace (3, inferior_pid, i, 0);
- ptrace (6, inferior_pid, i, value);
- if (errno == 0)
- {
- printf_filtered (" Succeeded with address 0x%x; value 0x%x (%d).\n",
- i, value, value);
- }
- else if ((i & 0377) == 0)
- printf_filtered (" Failed at 0x%x.\n", i);
- }
- }
- */
-
-
- void
- initialize_st_inflo ()
- {
- add_com ("term-status", class_obscure, term_status_command,
- "Print info on inferior's saved terminal status.");
-
- /*
- add_com ("try-writing-regs", class_obscure, try_writing_regs_command,
- "Try writing all locations in inferior's system block.\n\
- Report which ones can be written.");
- */
-
- add_com ("kill", class_run, kill_command,
- "Kill execution of program being debugged.");
-
- inferior_pid = 0;
-
- ioctl (0, TIOCGETP, &sg_ours);
- /* fcntl (0, F_GETFL, tflags_ours); ??? */
-
- /* ???
- #ifdef TIOCGLTC
- ioctl (0, TIOCGETC, &tc_ours);
- ioctl (0, TIOCGLTC, <c_ours);
- ioctl (0, TIOCLGET, &lmode_ours);
- #endif /* TIOCGLTC */
-
- /* ???
- #ifdef TIOCGPGRP
- ioctl (0, TIOCGPGRP, &pgrp_ours);
- #endif /* TIOCGPGRP */
-
- terminal_is_ours = 1;
- }
-