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Diffstat (limited to 'gnu/usr.bin/kgdb/infcmd.c')
| -rw-r--r-- | gnu/usr.bin/kgdb/infcmd.c | 1200 |
1 files changed, 1200 insertions, 0 deletions
diff --git a/gnu/usr.bin/kgdb/infcmd.c b/gnu/usr.bin/kgdb/infcmd.c new file mode 100644 index 000000000000..a9db0c6749c5 --- /dev/null +++ b/gnu/usr.bin/kgdb/infcmd.c @@ -0,0 +1,1200 @@ +/*- + * This code is derived from software copyrighted by the Free Software + * Foundation. + * + * Modified 1991 by Donn Seeley at UUNET Technologies, Inc. + * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory. + */ + +#ifndef lint +static char sccsid[] = "@(#)infcmd.c 6.4 (Berkeley) 5/8/91"; +#endif /* not lint */ + +/* Memory-access and commands for inferior process, for GDB. + Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc. + +This file is part of GDB. + +GDB 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 1, or (at your option) +any later version. + +GDB 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 GDB; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include <stdio.h> +#include "defs.h" +#include "param.h" +#include "symtab.h" +#include "frame.h" +#include "inferior.h" +#include "environ.h" +#include "value.h" + +#include <signal.h> +#include <sys/param.h> + +#define ERROR_NO_INFERIOR \ + if (inferior_pid == 0) error ("The program is not being run."); + +/* String containing arguments to give to the program, + with a space added at the front. Just a space means no args. */ + +static char *inferior_args; + +/* File name for default use for standard in/out in the inferior. */ + +char *inferior_io_terminal; + +/* Pid of our debugged inferior, or 0 if no inferior now. */ + +int inferior_pid; + +/* Last signal that the inferior received (why it stopped). */ + +int stop_signal; + +/* Address at which inferior stopped. */ + +CORE_ADDR stop_pc; + +/* Stack frame when program stopped. */ + +FRAME_ADDR stop_frame_address; + +/* Number of breakpoint it stopped at, or 0 if none. */ + +int stop_breakpoint; + +/* Nonzero if stopped due to a step command. */ + +int stop_step; + +/* Nonzero if stopped due to completion of a stack dummy routine. */ + +int stop_stack_dummy; + +/* Nonzero if stopped due to a random (unexpected) signal in inferior + process. */ + +int stopped_by_random_signal; + +/* Range to single step within. + If this is nonzero, respond to a single-step signal + by continuing to step if the pc is in this range. */ + +CORE_ADDR step_range_start; /* Inclusive */ +CORE_ADDR step_range_end; /* Exclusive */ + +/* Stack frame address as of when stepping command was issued. + This is how we know when we step into a subroutine call, + and how to set the frame for the breakpoint used to step out. */ + +FRAME_ADDR step_frame_address; + +/* 1 means step over all subroutine calls. + -1 means step over calls to undebuggable functions. */ + +int step_over_calls; + +/* If stepping, nonzero means step count is > 1 + so don't print frame next time inferior stops + if it stops due to stepping. */ + +int step_multi; + +/* Environment to use for running inferior, + in format described in environ.h. */ + +struct environ *inferior_environ; + +CORE_ADDR read_pc (); +struct command_line *get_breakpoint_commands (); +void breakpoint_clear_ignore_counts (); + + +int +have_inferior_p () +{ + return inferior_pid != 0; +} + +static void +set_args_command (args) + char *args; +{ + free (inferior_args); + if (!args) args = ""; + inferior_args = concat (" ", args, ""); +} + +void +tty_command (file, from_tty) + char *file; + int from_tty; +{ + if (file == 0) + error_no_arg ("terminal name for running target process"); + + inferior_io_terminal = savestring (file, strlen (file)); +} + +static void +run_command (args, from_tty) + char *args; + int from_tty; +{ + extern char **environ; + register int i; + char *exec_file; + char *allargs; + + extern int sys_nerr; + extern int errno; + + dont_repeat (); + + if (inferior_pid) + { + extern int inhibit_confirm; + if (!(inhibit_confirm || + query ("The program being debugged has been started already.\n\ +Start it from the beginning? "))) + error ("Program not restarted."); + kill_inferior (); + } + +#if 0 + /* On the other hand, some users want to do + break open + ignore 1 40 + run + So it's not clear what is best. */ + + /* It is confusing to the user for ignore counts to stick around + from previous runs of the inferior. So clear them. */ + breakpoint_clear_ignore_counts (); +#endif + + exec_file = (char *) get_exec_file (1); + + if (remote_debugging) + { + if (from_tty) + { + printf ("Starting program: %s\n", exec_file); + fflush (stdout); + } + } + else + { + if (args) + set_args_command (args); + + if (from_tty) + { + printf ("Starting program: %s%s\n", + exec_file, inferior_args); + fflush (stdout); + } + + allargs = concat ("exec ", exec_file, inferior_args); + inferior_pid = create_inferior (allargs, environ_vector (inferior_environ)); + } + + clear_proceed_status (); + + start_inferior (); +} + +void +cont_command (proc_count_exp, from_tty) + char *proc_count_exp; + int from_tty; +{ + ERROR_NO_INFERIOR; + + clear_proceed_status (); + + /* If have argument, set proceed count of breakpoint we stopped at. */ + + if (stop_breakpoint > 0 && proc_count_exp) + { + set_ignore_count (stop_breakpoint, + parse_and_eval_address (proc_count_exp) - 1, + from_tty); + if (from_tty) + printf (" "); + } + + if (from_tty) + printf ("Continuing.\n"); + + proceed (-1, -1, 0); +} + +/* Step until outside of current statement. */ +static void step_1 (); + +static void +step_command (count_string) +{ + step_1 (0, 0, count_string); +} + +/* Likewise, but skip over subroutine calls as if single instructions. */ + +static void +next_command (count_string) +{ + step_1 (1, 0, count_string); +} + +/* Likewise, but step only one instruction. */ + +static void +stepi_command (count_string) +{ + step_1 (0, 1, count_string); +} + +static void +nexti_command (count_string) +{ + step_1 (1, 1, count_string); +} + +static void +step_1 (skip_subroutines, single_inst, count_string) + int skip_subroutines; + int single_inst; + char *count_string; +{ + register int count = 1; + + ERROR_NO_INFERIOR; + count = count_string ? parse_and_eval_address (count_string) : 1; + + for (; count > 0; count--) + { + clear_proceed_status (); + + step_frame_address = FRAME_FP (get_current_frame ()); + + if (! single_inst) + { + find_pc_line_pc_range (stop_pc, &step_range_start, &step_range_end); + if (step_range_end == 0) + { + int misc; + + misc = find_pc_misc_function (stop_pc); + terminal_ours (); + printf ("Current function has no line number information.\n"); + fflush (stdout); + + /* No info or after _etext ("Can't happen") */ + if (misc == -1 || misc == misc_function_count - 1) + error ("No data available on pc function."); + + printf ("Single stepping until function exit.\n"); + fflush (stdout); + + step_range_start = misc_function_vector[misc].address; + step_range_end = misc_function_vector[misc + 1].address; + } + } + else + { + /* Say we are stepping, but stop after one insn whatever it does. + Don't step through subroutine calls even to undebuggable + functions. */ + step_range_start = step_range_end = 1; + if (!skip_subroutines) + step_over_calls = 0; + } + + if (skip_subroutines) + step_over_calls = 1; + + step_multi = (count > 1); + proceed (-1, -1, 1); + if (! stop_step) + break; + } +} + +/* Continue program at specified address. */ + +static void +jump_command (arg, from_tty) + char *arg; + int from_tty; +{ + register CORE_ADDR addr; + struct symtabs_and_lines sals; + struct symtab_and_line sal; + + ERROR_NO_INFERIOR; + + if (!arg) + error_no_arg ("starting address"); + + sals = decode_line_spec_1 (arg, 1); + if (sals.nelts != 1) + { + error ("Unreasonable jump request"); + } + + sal = sals.sals[0]; + free (sals.sals); + + if (sal.symtab == 0 && sal.pc == 0) + error ("No source file has been specified."); + + if (sal.pc == 0) + sal.pc = find_line_pc (sal.symtab, sal.line); + + { + struct symbol *fn = get_frame_function (get_current_frame ()); + struct symbol *sfn = find_pc_function (sal.pc); + if (fn != 0 && sfn != fn + && ! query ("Line %d is not in `%s'. Jump anyway? ", + sal.line, SYMBOL_NAME (fn))) + error ("Not confirmed."); + } + + if (sal.pc == 0) + error ("No line %d in file \"%s\".", sal.line, sal.symtab->filename); + + addr = sal.pc; + + clear_proceed_status (); + + if (from_tty) + printf ("Continuing at 0x%x.\n", addr); + + proceed (addr, 0, 0); +} + +/* Continue program giving it specified signal. */ + +static void +signal_command (signum_exp, from_tty) + char *signum_exp; + int from_tty; +{ + register int signum; + + dont_repeat (); /* Too dangerous. */ + ERROR_NO_INFERIOR; + + if (!signum_exp) + error_no_arg ("signal number"); + + signum = parse_and_eval_address (signum_exp); + + clear_proceed_status (); + + if (from_tty) + printf ("Continuing with signal %d.\n", signum); + + proceed (stop_pc, signum, 0); +} + +/* Execute a "stack dummy", a piece of code stored in the stack + by the debugger to be executed in the inferior. + + To call: first, do PUSH_DUMMY_FRAME. + Then push the contents of the dummy. It should end with a breakpoint insn. + Then call here, passing address at which to start the dummy. + + The contents of all registers are saved before the dummy frame is popped + and copied into the buffer BUFFER. + + The dummy's frame is automatically popped whenever that break is hit. + If that is the first time the program stops, run_stack_dummy + returns to its caller with that frame already gone. + Otherwise, the caller never gets returned to. */ + +/* 4 => return instead of letting the stack dummy run. */ + +static int stack_dummy_testing = 0; + +void +run_stack_dummy (addr, buffer) + CORE_ADDR addr; + REGISTER_TYPE *buffer; +{ + /* Now proceed, having reached the desired place. */ + clear_proceed_status (); +#ifdef notdef + if (stack_dummy_testing & 4) + { + POP_FRAME; + return; + } +#endif + proceed (addr, 0, 0); + + if (!stop_stack_dummy) + error ("Cannot continue previously requested operation."); + + /* On return, the stack dummy has been popped already. */ + + read_register_bytes(0, buffer, REGISTER_BYTES); +} + +/* Proceed until we reach the given line as argument or exit the + function. When called with no argument, proceed until we reach a + different source line with pc greater than our current one or exit + the function. We skip calls in both cases. + + The effect of this command with an argument is identical to setting + a momentary breakpoint at the line specified and executing + "finish". + + Note that eventually this command should probably be changed so + that only source lines are printed out when we hit the breakpoint + we set. I'm going to postpone this until after a hopeful rewrite + of wait_for_inferior and the proceed status code. -- randy */ + +void +until_next_command (arg, from_tty) + char *arg; + int from_tty; +{ + FRAME frame; + CORE_ADDR pc; + struct symbol *func; + struct symtab_and_line sal; + + clear_proceed_status (); + + frame = get_current_frame (); + + /* Step until either exited from this function or greater + than the current line (if in symbolic section) or pc (if + not). */ + + pc = read_pc (); + func = find_pc_function (pc); + + if (!func) + { + int misc_func = find_pc_misc_function (pc); + + if (misc_func != -1) + error ("Execution is not within a known function."); + + step_range_start = misc_function_vector[misc_func].address; + step_range_end = pc; + } + else + { + sal = find_pc_line (pc, 0); + + step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func)); + step_range_end = sal.end; + } + + step_over_calls = 1; + step_frame_address = FRAME_FP (frame); + + step_multi = 0; /* Only one call to proceed */ + + proceed (-1, -1, 1); +} + +void +until_command (arg, from_tty) + char *arg; + int from_tty; +{ + if (!have_inferior_p ()) + error ("The program is not being run."); + + if (arg) + until_break_command (arg, from_tty); + else + until_next_command (arg, from_tty); +} + +/* "finish": Set a temporary breakpoint at the place + the selected frame will return to, then continue. */ + +static void +finish_command (arg, from_tty) + char *arg; + int from_tty; +{ + struct symtab_and_line sal; + register FRAME frame; + struct frame_info *fi; + register struct symbol *function; + + if (!have_inferior_p ()) + error ("The program is not being run."); + if (arg) + error ("The \"finish\" command does not take any arguments."); + + frame = get_prev_frame (selected_frame); + if (frame == 0) + error ("\"finish\" not meaningful in the outermost frame."); + + clear_proceed_status (); + + fi = get_frame_info (frame); + sal = find_pc_line (fi->pc, 0); + sal.pc = fi->pc; + set_momentary_breakpoint (sal, frame); + + /* Find the function we will return from. */ + + fi = get_frame_info (selected_frame); + function = find_pc_function (fi->pc); + + if (from_tty) + { + printf ("Run till exit from "); + print_selected_frame (); + } + + proceed (-1, -1, 0); + + if (stop_breakpoint == -3 && function != 0) + { + struct type *value_type; + register value val; + CORE_ADDR funcaddr; + extern char registers[]; + + value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (function)); + if (!value_type) + fatal ("internal: finish_command: function has no target type"); + + if (TYPE_CODE (value_type) == TYPE_CODE_VOID) + return; + + funcaddr = BLOCK_START (SYMBOL_BLOCK_VALUE (function)); + + val = value_being_returned (value_type, registers, + using_struct_return (function, + funcaddr, + value_type)); + + printf ("Value returned is $%d = ", record_latest_value (val)); + value_print (val, stdout, 0, Val_no_prettyprint); + putchar ('\n'); + } +} + +static void +program_info () +{ + if (inferior_pid == 0) + { + printf ("The program being debugged is not being run.\n"); + return; + } + + printf ("Program being debugged is in process %d, stopped at 0x%x.\n", + inferior_pid, stop_pc); + if (stop_step) + printf ("It stopped after being stepped.\n"); + else if (stop_breakpoint > 0) + printf ("It stopped at breakpoint %d.\n", stop_breakpoint); + else if (stop_signal) + printf ("It stopped with signal %d (%s).\n", + stop_signal, sys_siglist[stop_signal]); + + printf ("\nType \"info stack\" or \"info reg\" for more information.\n"); +} + +static void +environment_info (var) + char *var; +{ + if (var) + { + register char *val = get_in_environ (inferior_environ, var); + if (val) + printf ("%s = %s\n", var, val); + else + printf ("Environment variable \"%s\" not defined.\n", var); + } + else + { + register char **vector = environ_vector (inferior_environ); + while (*vector) + printf ("%s\n", *vector++); + } +} + +static void +set_environment_command (arg) + char *arg; +{ + register char *p, *val, *var; + int nullset = 0; + + if (arg == 0) + error_no_arg ("environment variable and value"); + + /* Find seperation between variable name and value */ + p = (char *) index (arg, '='); + val = (char *) index (arg, ' '); + + if (p != 0 && val != 0) + { + /* We have both a space and an equals. If the space is before the + equals and the only thing between the two is more space, use + the equals */ + if (p > val) + while (*val == ' ') + val++; + + /* Take the smaller of the two. If there was space before the + "=", they will be the same right now. */ + p = arg + min (p - arg, val - arg); + } + else if (val != 0 && p == 0) + p = val; + + if (p == arg) + error_no_arg ("environment variable to set"); + + if (p == 0 || p[1] == 0) + { + nullset = 1; + if (p == 0) + p = arg + strlen (arg); /* So that savestring below will work */ + } + else + { + /* Not setting variable value to null */ + val = p + 1; + while (*val == ' ' || *val == '\t') + val++; + } + + while (p != arg && (p[-1] == ' ' || p[-1] == '\t')) p--; + + var = savestring (arg, p - arg); + if (nullset) + { + printf ("Setting environment variable \"%s\" to null value.\n", var); + set_in_environ (inferior_environ, var, ""); + } + else + set_in_environ (inferior_environ, var, val); + free (var); +} + +static void +unset_environment_command (var, from_tty) + char *var; + int from_tty; +{ + if (var == 0) + /* If there is no argument, delete all environment variables. + Ask for confirmation if reading from the terminal. */ + if (!from_tty || query ("Delete all environment variables? ")) + { + free_environ (inferior_environ); + inferior_environ = make_environ (); + } + + unset_in_environ (inferior_environ, var); +} + +/* Read an integer from debugged memory, given address and number of bytes. */ + +long +read_memory_integer (memaddr, len) + CORE_ADDR memaddr; + int len; +{ + char cbuf; + short sbuf; + int ibuf; + long lbuf; + int result_err; + extern int sys_nerr; + + if (len == sizeof (char)) + { + result_err = read_memory (memaddr, &cbuf, len); + if (result_err) + error ("Error reading memory address 0x%x: %s (%d).", + memaddr, (result_err < sys_nerr ? + sys_errlist[result_err] : + "uknown error"), result_err); + return cbuf; + } + if (len == sizeof (short)) + { + result_err = read_memory (memaddr, &sbuf, len); + if (result_err) + error ("Error reading memory address 0x%x: %s (%d).", + memaddr, (result_err < sys_nerr ? + sys_errlist[result_err] : + "uknown error"), result_err); + return sbuf; + } + if (len == sizeof (int)) + { + result_err = read_memory (memaddr, &ibuf, len); + if (result_err) + error ("Error reading memory address 0x%x: %s (%d).", + memaddr, (result_err < sys_nerr ? + sys_errlist[result_err] : + "uknown error"), result_err); + return ibuf; + } + if (len == sizeof (lbuf)) + { + result_err = read_memory (memaddr, &lbuf, len); + if (result_err) + error ("Error reading memory address 0x%x: %s (%d).", + memaddr, (result_err < sys_nerr ? + sys_errlist[result_err] : + "uknown error"), result_err); + return lbuf; + } + error ("Cannot handle integers of %d bytes.", len); +} + +CORE_ADDR +read_pc () +{ + return (CORE_ADDR) read_register (PC_REGNUM); +} + +void +write_pc (val) + CORE_ADDR val; +{ + write_register (PC_REGNUM, (long) val); +#ifdef NPC_REGNUM + write_register (NPC_REGNUM, (long) val+4); +#endif +} + +char *reg_names[] = REGISTER_NAMES; + +#if !defined (DO_REGISTERS_INFO) +static void +print_one_register(i) + int i; +{ + unsigned char raw_buffer[MAX_REGISTER_RAW_SIZE]; + unsigned char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE]; + REGISTER_TYPE val; + + /* Get the data in raw format, then convert also to virtual format. */ + read_relative_register_raw_bytes (i, raw_buffer); + REGISTER_CONVERT_TO_VIRTUAL (i, raw_buffer, virtual_buffer); + + fputs_filtered (reg_names[i], stdout); + print_spaces_filtered (15 - strlen (reg_names[i]), stdout); + + /* If virtual format is floating, print it that way. */ + if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT + && ! INVALID_FLOAT (virtual_buffer, REGISTER_VIRTUAL_SIZE (i))) + val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, + stdout, 0, 1, 0, Val_pretty_default); + /* Else if virtual format is too long for printf, + print in hex a byte at a time. */ + else if (REGISTER_VIRTUAL_SIZE (i) > sizeof (long)) + { + register int j; + printf_filtered ("0x"); + for (j = 0; j < REGISTER_VIRTUAL_SIZE (i); j++) + printf_filtered ("%02x", virtual_buffer[j]); + } + /* Else print as integer in hex and in decimal. */ + else + { + long val; + + bcopy (virtual_buffer, &val, sizeof (long)); + if (val == 0) + printf_filtered ("0"); + else + printf_filtered ("0x%08x %d", val, val); + } + + /* If register has different raw and virtual formats, + print the raw format in hex now. */ + + if (REGISTER_CONVERTIBLE (i)) + { + register int j; + + printf_filtered (" (raw 0x"); + for (j = 0; j < REGISTER_RAW_SIZE (i); j++) + printf_filtered ("%02x", raw_buffer[j]); + printf_filtered (")"); + } + printf_filtered ("\n"); +} + + +/* Print out the machine register regnum. If regnum is -1, + print all registers. + For most machines, having all_registers_info() print the + register(s) one per line is good enough. If a different format + is required, (eg, for SPARC or Pyramid 90x, which both have + lots of regs), or there is an existing convention for showing + all the registers, define the macro DO_REGISTERS_INFO(regnum) + to provide that format. */ +static void +do_registers_info (regnum, fpregs) + int regnum; + int fpregs; +{ + register int i; + + if (regnum >= 0) { + print_one_register(regnum); + return; + } +#ifdef notdef + printf_filtered ( +"Register Contents (relative to selected stack frame)\n\n"); +#endif + for (i = 0; i < NUM_REGS; i++) + if (TYPE_CODE(REGISTER_VIRTUAL_TYPE(i)) != TYPE_CODE_FLT || + fpregs) + print_one_register(i); +} +#endif /* no DO_REGISTERS_INFO. */ + +static void +registers_info (addr_exp, fpregs) + char *addr_exp; + int fpregs; +{ + int regnum; + + if (!have_inferior_p () && !have_core_file_p ()) + error ("No inferior or core file"); + + if (addr_exp) + { + if (*addr_exp >= '0' && *addr_exp <= '9') + regnum = atoi (addr_exp); + else + { + register char *p = addr_exp; + if (p[0] == '$') + p++; + for (regnum = 0; regnum < NUM_REGS; regnum++) + if (!strcmp (p, reg_names[regnum])) + break; + if (regnum == NUM_REGS) + error ("%s: invalid register name.", addr_exp); + } + } + else + regnum = -1; + +#ifdef DO_REGISTERS_INFO + DO_REGISTERS_INFO(regnum); +#else + do_registers_info(regnum, fpregs); +#endif +} + +static void +all_registers_info (addr_exp) + char *addr_exp; +{ + registers_info(addr_exp, 1); +} + +static void +nofp_registers_info (addr_exp) + char *addr_exp; +{ + registers_info(addr_exp, 0); +} + + +#ifdef ATTACH_DETACH +#define PROCESS_ATTACH_ALLOWED 1 +#else +#define PROCESS_ATTACH_ALLOWED 0 +#endif +/* + * TODO: + * Should save/restore the tty state since it might be that the + * program to be debugged was started on this tty and it wants + * the tty in some state other than what we want. If it's running + * on another terminal or without a terminal, then saving and + * restoring the tty state is a harmless no-op. + * This only needs to be done if we are attaching to a process. + */ + +/* + * attach_command -- + * takes a program started up outside of gdb and ``attaches'' to it. + * This stops it cold in its tracks and allows us to start tracing it. + * For this to work, we must be able to send the process a + * signal and we must have the same effective uid as the program. + */ +static void +attach_command (args, from_tty) + char *args; + int from_tty; +{ + char *exec_file; + int pid; + int remote = 0; + + dont_repeat(); + + if (!args) + error_no_arg ("process-id or device file to attach"); + + while (*args == ' ' || *args == '\t') args++; + + if (args[0] < '0' || args[0] > '9') + remote = 1; + else +#ifndef ATTACH_DETACH + error ("Can't attach to a process on this machine."); +#else + pid = atoi (args); +#endif + + if (inferior_pid) + { + if (query ("A program is being debugged already. Kill it? ")) + kill_inferior (); + else + error ("Inferior not killed."); + } + + exec_file = (char *) get_exec_file (1); + + if (from_tty) + { + if (remote) + printf ("Attaching remote machine\n"); + else + printf ("Attaching program: %s pid %d\n", + exec_file, pid); + fflush (stdout); + } + + if (remote) + { + remote_open (args, from_tty); + start_remote (); + } +#ifdef ATTACH_DETACH + else + attach_program (pid); +#endif +} + +/* + * detach_command -- + * takes a program previously attached to and detaches it. + * The program resumes execution and will no longer stop + * on signals, etc. We better not have left any breakpoints + * in the program or it'll die when it hits one. For this + * to work, it may be necessary for the process to have been + * previously attached. It *might* work if the program was + * started via the normal ptrace (PTRACE_TRACEME). + */ + +static void +detach_command (args, from_tty) + char *args; + int from_tty; +{ + int signal = 0; + +#ifdef ATTACH_DETACH + if (inferior_pid && !remote_debugging) + { + if (from_tty) + { + char *exec_file = (char *)get_exec_file (0); + if (exec_file == 0) + exec_file = ""; + printf ("Detaching program: %s pid %d\n", + exec_file, inferior_pid); + fflush (stdout); + } + if (args) + signal = atoi (args); + + detach (signal); + inferior_pid = 0; + } + else +#endif + { + if (!remote_debugging) + error ("Not currently attached to subsidiary or remote process."); + + if (args) + error ("Argument given to \"detach\" when remotely debugging."); + + inferior_pid = 0; + remote_close (from_tty); + } +} + +/* ARGSUSED */ +static void +float_info (addr_exp) + char *addr_exp; +{ +#ifdef FLOAT_INFO + FLOAT_INFO; +#else + printf ("No floating point info available for this processor.\n"); +#endif +} + +extern struct cmd_list_element *setlist, *deletelist; + +void +_initialize_infcmd () +{ + add_com ("tty", class_run, tty_command, + "Set terminal for future runs of program being debugged."); + + add_cmd ("args", class_run, set_args_command, + "Specify arguments to give program being debugged when it is started.\n\ +Follow this command with any number of args, to be passed to the program.", + &setlist); + + add_info ("environment", environment_info, + "The environment to give the program, or one variable's value.\n\ +With an argument VAR, prints the value of environment variable VAR to\n\ +give the program being debugged. With no arguments, prints the entire\n\ +environment to be given to the program."); + + add_cmd ("environment", class_run, unset_environment_command, + "Cancel environment variable VAR for the program.\n\ +This does not affect the program until the next \"run\" command.", + &deletelist); + + add_cmd ("environment", class_run, set_environment_command, + "Set environment variable value to give the program.\n\ +Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\ +VALUES of environment variables are uninterpreted strings.\n\ +This does not affect the program until the next \"run\" command.", + &setlist); + +#ifdef ATTACH_DETACH + add_com ("attach", class_run, attach_command, + "Attach to a process that was started up outside of GDB.\n\ +This command may take as argument a process id or a device file.\n\ +For a process id, you must have permission to send the process a signal,\n\ +and it must have the same effective uid as the debugger.\n\ +For a device file, the file must be a connection to a remote debug server.\n\n\ +Before using \"attach\", you must use the \"exec-file\" command\n\ +to specify the program running in the process,\n\ +and the \"symbol-file\" command to load its symbol table."); +#else + add_com ("attach", class_run, attach_command, + "Attach to a process that was started up outside of GDB.\n\ +This commands takes as an argument the name of a device file.\n\ +This file must be a connection to a remote debug server.\n\n\ +Before using \"attach\", you must use the \"exec-file\" command\n\ +to specify the program running in the process,\n\ +and the \"symbol-file\" command to load its symbol table."); +#endif + add_com ("detach", class_run, detach_command, + "Detach the process previously attached.\n\ +The process is no longer traced and continues its execution."); + + add_com ("signal", class_run, signal_command, + "Continue program giving it signal number SIGNUMBER."); + + add_com ("stepi", class_run, stepi_command, + "Step one instruction exactly.\n\ +Argument N means do this N times (or till program stops for another reason)."); + add_com_alias ("si", "stepi", class_alias, 0); + + add_com ("nexti", class_run, nexti_command, + "Step one instruction, but proceed through subroutine calls.\n\ +Argument N means do this N times (or till program stops for another reason)."); + add_com_alias ("ni", "nexti", class_alias, 0); + + add_com ("finish", class_run, finish_command, + "Execute until selected stack frame returns.\n\ +Upon return, the value returned is printed and put in the value history."); + + add_com ("next", class_run, next_command, + "Step program, proceeding through subroutine calls.\n\ +Like the \"step\" command as long as subroutine calls do not happen;\n\ +when they do, the call is treated as one instruction.\n\ +Argument N means do this N times (or till program stops for another reason)."); + add_com_alias ("n", "next", class_run, 1); + + add_com ("step", class_run, step_command, + "Step program until it reaches a different source line.\n\ +Argument N means do this N times (or till program stops for another reason)."); + add_com_alias ("s", "step", class_run, 1); + + add_com ("until", class_run, until_command, + "Execute until the program reaches a source line greater than the current\n\ +or a specified line or address or function (same args as break command).\n\ +Execution will also stop upon exit from the current stack frame."); + add_com_alias ("u", "until", class_run, 1); + + add_com ("jump", class_run, jump_command, + "Continue program being debugged at specified line or address.\n\ +Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\ +for an address to start at."); + + add_com ("cont", class_run, cont_command, + "Continue program being debugged, after signal or breakpoint.\n\ +If proceeding from breakpoint, a number N may be used as an argument:\n\ +then the same breakpoint won't break until the Nth time it is reached."); + add_com_alias ("c", "cont", class_run, 1); + + add_com ("run", class_run, run_command, + "Start debugged program. You may specify arguments to give it.\n\ +Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\ +Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\ +With no arguments, uses arguments last specified (with \"run\" or \"set args\".\n\ +To cancel previous arguments and run with no arguments,\n\ +use \"set args\" without arguments."); + add_com_alias ("r", "run", class_run, 1); + + add_info ("registers", nofp_registers_info, + "List of registers and their contents, for selected stack frame.\n\ +Register name as argument means describe only that register.\n\ +(Doesn't display floating point registers; use 'info all-registers'.)\n"); + + add_info ("all-registers", all_registers_info, + "List of registers and their contents, for selected stack frame.\n\ +Register name as argument means describe only that register."); + + add_info ("program", program_info, + "Execution status of the program."); + + add_info ("float", float_info, + "Print the status of the floating point unit\n"); + + inferior_args = savestring (" ", 1); /* By default, no args. */ + inferior_environ = make_environ (); + init_environ (inferior_environ); +} + |