16d2cc8084
* inflow.c (job_control, attach_flag, generic_mourn_inferior): Remove, needed for both native and cross. * target.c (attach_flag, generic_mourn_inferior): Put here. * utils.c (job_control): Put here. (terminal.h): Don't include anymore.
1303 lines
33 KiB
C
1303 lines
33 KiB
C
/* Select target systems and architectures at runtime for GDB.
|
||
Copyright 1990, 1992, 1993, 1994 Free Software Foundation, Inc.
|
||
Contributed by Cygnus Support.
|
||
|
||
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 <errno.h>
|
||
#include <ctype.h>
|
||
#include "target.h"
|
||
#include "gdbcmd.h"
|
||
#include "symtab.h"
|
||
#include "inferior.h"
|
||
#include "bfd.h"
|
||
#include "symfile.h"
|
||
#include "objfiles.h"
|
||
#include "wait.h"
|
||
#include <signal.h>
|
||
|
||
extern int errno;
|
||
|
||
static void
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||
target_info PARAMS ((char *, int));
|
||
|
||
static void
|
||
cleanup_target PARAMS ((struct target_ops *));
|
||
|
||
static void
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||
maybe_kill_then_create_inferior PARAMS ((char *, char *, char **));
|
||
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||
static void
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||
maybe_kill_then_attach PARAMS ((char *, int));
|
||
|
||
static void
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||
kill_or_be_killed PARAMS ((int));
|
||
|
||
static void
|
||
default_terminal_info PARAMS ((char *, int));
|
||
|
||
static int
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||
nosymbol PARAMS ((char *, CORE_ADDR *));
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static void
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||
tcomplain PARAMS ((void));
|
||
|
||
static int
|
||
nomemory PARAMS ((CORE_ADDR, char *, int, int));
|
||
|
||
static int
|
||
return_zero PARAMS ((void));
|
||
|
||
static void
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||
ignore PARAMS ((void));
|
||
|
||
static void
|
||
target_command PARAMS ((char *, int));
|
||
|
||
static struct target_ops *
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find_default_run_target PARAMS ((char *));
|
||
|
||
/* Pointer to array of target architecture structures; the size of the
|
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array; the current index into the array; the allocated size of the
|
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array. */
|
||
struct target_ops **target_structs;
|
||
unsigned target_struct_size;
|
||
unsigned target_struct_index;
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||
unsigned target_struct_allocsize;
|
||
#define DEFAULT_ALLOCSIZE 10
|
||
|
||
/* The initial current target, so that there is always a semi-valid
|
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current target. */
|
||
|
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struct target_ops dummy_target = {"None", "None", "",
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0, 0, /* open, close */
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||
find_default_attach, 0, /* attach, detach */
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||
0, 0, /* resume, wait */
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||
0, 0, 0, /* registers */
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0, 0, /* memory */
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||
0, 0, /* bkpts */
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0, 0, 0, 0, 0, /* terminal */
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||
0, 0, /* kill, load */
|
||
0, /* lookup_symbol */
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||
find_default_create_inferior, /* create_inferior */
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||
0, /* mourn_inferior */
|
||
0, /* can_run */
|
||
0, /* notice_signals */
|
||
dummy_stratum, 0, /* stratum, next */
|
||
0, 0, 0, 0, 0, /* all mem, mem, stack, regs, exec */
|
||
0, 0, /* section pointers */
|
||
OPS_MAGIC,
|
||
};
|
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|
||
/* The target structure we are currently using to talk to a process
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or file or whatever "inferior" we have. */
|
||
|
||
struct target_ops *current_target;
|
||
|
||
/* The stack of target structures that have been pushed. */
|
||
|
||
struct target_ops **current_target_stack;
|
||
|
||
/* Command list for target. */
|
||
|
||
static struct cmd_list_element *targetlist = NULL;
|
||
|
||
/* Nonzero if we are debugging an attached outside process
|
||
rather than an inferior. */
|
||
|
||
int attach_flag;
|
||
|
||
/* The user just typed 'target' without the name of a target. */
|
||
|
||
/* ARGSUSED */
|
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static void
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||
target_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
fputs_filtered ("Argument required (target name). Try `help target'\n",
|
||
gdb_stdout);
|
||
}
|
||
|
||
/* Add a possible target architecture to the list. */
|
||
|
||
void
|
||
add_target (t)
|
||
struct target_ops *t;
|
||
{
|
||
if (t->to_magic != OPS_MAGIC)
|
||
{
|
||
fprintf_unfiltered(gdb_stderr, "Magic number of %s target struct wrong\n",
|
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t->to_shortname);
|
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abort();
|
||
}
|
||
|
||
if (!target_structs)
|
||
{
|
||
target_struct_allocsize = DEFAULT_ALLOCSIZE;
|
||
target_structs = (struct target_ops **) xmalloc
|
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(target_struct_allocsize * sizeof (*target_structs));
|
||
}
|
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if (target_struct_size >= target_struct_allocsize)
|
||
{
|
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target_struct_allocsize *= 2;
|
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target_structs = (struct target_ops **)
|
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xrealloc ((char *) target_structs,
|
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target_struct_allocsize * sizeof (*target_structs));
|
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}
|
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target_structs[target_struct_size++] = t;
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cleanup_target (t);
|
||
|
||
if (targetlist == NULL)
|
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add_prefix_cmd ("target", class_run, target_command,
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"Connect to a target machine or process.\n\
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The first argument is the type or protocol of the target machine.\n\
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Remaining arguments are interpreted by the target protocol. For more\n\
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information on the arguments for a particular protocol, type\n\
|
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`help target ' followed by the protocol name.",
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&targetlist, "target ", 0, &cmdlist);
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add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist);
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}
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|
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/* Stub functions */
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static void
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ignore ()
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||
{
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}
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/* ARGSUSED */
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static int
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nomemory (memaddr, myaddr, len, write)
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CORE_ADDR memaddr;
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char *myaddr;
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int len;
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int write;
|
||
{
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errno = EIO; /* Can't read/write this location */
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return 0; /* No bytes handled */
|
||
}
|
||
|
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static void
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||
tcomplain ()
|
||
{
|
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error ("You can't do that when your target is `%s'",
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current_target->to_shortname);
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||
}
|
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|
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void
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||
noprocess ()
|
||
{
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error ("You can't do that without a process to debug");
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||
}
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/* ARGSUSED */
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static int
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nosymbol (name, addrp)
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char *name;
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CORE_ADDR *addrp;
|
||
{
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return 1; /* Symbol does not exist in target env */
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}
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|
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/* ARGSUSED */
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static void
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||
default_terminal_info (args, from_tty)
|
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char *args;
|
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int from_tty;
|
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{
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printf_unfiltered("No saved terminal information.\n");
|
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}
|
||
|
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#if 0
|
||
/* With strata, this function is no longer needed. FIXME. */
|
||
/* This is the default target_create_inferior function. It looks up
|
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the stack for some target that cares to create inferiors, then
|
||
calls it -- or complains if not found. */
|
||
|
||
static void
|
||
upstack_create_inferior (exec, args, env)
|
||
char *exec;
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||
char *args;
|
||
char **env;
|
||
{
|
||
struct target_ops *t;
|
||
|
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for (t = current_target;
|
||
t;
|
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t = t->to_next)
|
||
{
|
||
if (t->to_create_inferior != upstack_create_inferior)
|
||
{
|
||
t->to_create_inferior (exec, args, env);
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||
return;
|
||
}
|
||
|
||
}
|
||
tcomplain();
|
||
}
|
||
#endif
|
||
|
||
/* This is the default target_create_inferior and target_attach function.
|
||
If the current target is executing, it asks whether to kill it off.
|
||
If this function returns without calling error(), it has killed off
|
||
the target, and the operation should be attempted. */
|
||
|
||
static void
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||
kill_or_be_killed (from_tty)
|
||
int from_tty;
|
||
{
|
||
if (target_has_execution)
|
||
{
|
||
printf_unfiltered ("You are already running a program:\n");
|
||
target_files_info ();
|
||
if (query ("Kill it? ")) {
|
||
target_kill ();
|
||
if (target_has_execution)
|
||
error ("Killing the program did not help.");
|
||
return;
|
||
} else {
|
||
error ("Program not killed.");
|
||
}
|
||
}
|
||
tcomplain();
|
||
}
|
||
|
||
static void
|
||
maybe_kill_then_attach (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
kill_or_be_killed (from_tty);
|
||
target_attach (args, from_tty);
|
||
}
|
||
|
||
static void
|
||
maybe_kill_then_create_inferior (exec, args, env)
|
||
char *exec;
|
||
char *args;
|
||
char **env;
|
||
{
|
||
kill_or_be_killed (0);
|
||
target_create_inferior (exec, args, env);
|
||
}
|
||
|
||
/* Clean up a target struct so it no longer has any zero pointers in it.
|
||
We default entries, at least to stubs that print error messages. */
|
||
|
||
static void
|
||
cleanup_target (t)
|
||
struct target_ops *t;
|
||
{
|
||
|
||
/* Check magic number. If wrong, it probably means someone changed
|
||
the struct definition, but not all the places that initialize one. */
|
||
if (t->to_magic != OPS_MAGIC)
|
||
{
|
||
fprintf_unfiltered(gdb_stderr, "Magic number of %s target struct wrong\n",
|
||
t->to_shortname);
|
||
abort();
|
||
}
|
||
|
||
#define de_fault(field, value) \
|
||
if (!t->field) t->field = value
|
||
|
||
/* FIELD DEFAULT VALUE */
|
||
|
||
de_fault (to_open, (void (*)())tcomplain);
|
||
de_fault (to_close, (void (*)())ignore);
|
||
de_fault (to_attach, maybe_kill_then_attach);
|
||
de_fault (to_detach, (void (*)())ignore);
|
||
de_fault (to_resume, (void (*)())noprocess);
|
||
de_fault (to_wait, (int (*)())noprocess);
|
||
de_fault (to_fetch_registers, (void (*)())ignore);
|
||
de_fault (to_store_registers, (void (*)())noprocess);
|
||
de_fault (to_prepare_to_store, (void (*)())noprocess);
|
||
de_fault (to_xfer_memory, (int (*)())nomemory);
|
||
de_fault (to_files_info, (void (*)())ignore);
|
||
de_fault (to_insert_breakpoint, memory_insert_breakpoint);
|
||
de_fault (to_remove_breakpoint, memory_remove_breakpoint);
|
||
de_fault (to_terminal_init, ignore);
|
||
de_fault (to_terminal_inferior, ignore);
|
||
de_fault (to_terminal_ours_for_output,ignore);
|
||
de_fault (to_terminal_ours, ignore);
|
||
de_fault (to_terminal_info, default_terminal_info);
|
||
de_fault (to_kill, (void (*)())noprocess);
|
||
de_fault (to_load, (void (*)())tcomplain);
|
||
de_fault (to_lookup_symbol, nosymbol);
|
||
de_fault (to_create_inferior, maybe_kill_then_create_inferior);
|
||
de_fault (to_mourn_inferior, (void (*)())noprocess);
|
||
de_fault (to_can_run, return_zero);
|
||
de_fault (to_notice_signals, (void (*)())ignore);
|
||
de_fault (to_next, 0);
|
||
de_fault (to_has_all_memory, 0);
|
||
de_fault (to_has_memory, 0);
|
||
de_fault (to_has_stack, 0);
|
||
de_fault (to_has_registers, 0);
|
||
de_fault (to_has_execution, 0);
|
||
|
||
#undef de_fault
|
||
}
|
||
|
||
/* Push a new target type into the stack of the existing target accessors,
|
||
possibly superseding some of the existing accessors.
|
||
|
||
Result is zero if the pushed target ended up on top of the stack,
|
||
nonzero if at least one target is on top of it.
|
||
|
||
Rather than allow an empty stack, we always have the dummy target at
|
||
the bottom stratum, so we can call the function vectors without
|
||
checking them. */
|
||
|
||
int
|
||
push_target (t)
|
||
struct target_ops *t;
|
||
{
|
||
struct target_ops *st, *prev;
|
||
|
||
for (prev = 0, st = current_target;
|
||
st;
|
||
prev = st, st = st->to_next) {
|
||
if ((int)(t->to_stratum) >= (int)(st->to_stratum))
|
||
break;
|
||
}
|
||
|
||
while (t->to_stratum == st->to_stratum) {
|
||
/* There's already something on this stratum. Close it off. */
|
||
(st->to_close) (0);
|
||
if (prev)
|
||
prev->to_next = st->to_next; /* Unchain old target_ops */
|
||
else
|
||
current_target = st->to_next; /* Unchain first on list */
|
||
st = st->to_next;
|
||
}
|
||
|
||
/* We have removed all targets in our stratum, now add ourself. */
|
||
t->to_next = st;
|
||
if (prev)
|
||
prev->to_next = t;
|
||
else
|
||
current_target = t;
|
||
|
||
cleanup_target (current_target);
|
||
return prev != 0;
|
||
}
|
||
|
||
/* Remove a target_ops vector from the stack, wherever it may be.
|
||
Return how many times it was removed (0 or 1 unless bug). */
|
||
|
||
int
|
||
unpush_target (t)
|
||
struct target_ops *t;
|
||
{
|
||
struct target_ops *u, *v;
|
||
int result = 0;
|
||
|
||
for (u = current_target, v = 0;
|
||
u;
|
||
v = u, u = u->to_next)
|
||
if (u == t)
|
||
{
|
||
if (v == 0)
|
||
pop_target(); /* unchain top copy */
|
||
else {
|
||
(t->to_close)(0); /* Let it clean up */
|
||
v->to_next = t->to_next; /* unchain middle copy */
|
||
}
|
||
result++;
|
||
}
|
||
return result;
|
||
}
|
||
|
||
void
|
||
pop_target ()
|
||
{
|
||
(current_target->to_close)(0); /* Let it clean up */
|
||
current_target = current_target->to_next;
|
||
#if 0
|
||
/* This will dump core if ever called--push_target expects current_target
|
||
to be non-NULL. But I don't think it's needed; I don't see how the
|
||
dummy_target could ever be removed from the stack. */
|
||
if (!current_target) /* At bottom, push dummy. */
|
||
push_target (&dummy_target);
|
||
#endif
|
||
}
|
||
|
||
#undef MIN
|
||
#define MIN(A, B) (((A) <= (B)) ? (A) : (B))
|
||
|
||
/* target_read_string -- read a null terminated string, up to LEN bytes,
|
||
from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
|
||
Set *STRING to a pointer to malloc'd memory containing the data; the caller
|
||
is responsible for freeing it. Return the number of bytes successfully
|
||
read. */
|
||
|
||
int
|
||
target_read_string (memaddr, string, len, errnop)
|
||
CORE_ADDR memaddr;
|
||
char **string;
|
||
int len;
|
||
int *errnop;
|
||
{
|
||
int tlen, origlen, offset, i;
|
||
char buf[4];
|
||
int errcode = 0;
|
||
char *buffer;
|
||
int buffer_allocated;
|
||
char *bufptr;
|
||
unsigned int nbytes_read = 0;
|
||
|
||
/* Small for testing. */
|
||
buffer_allocated = 4;
|
||
buffer = xmalloc (buffer_allocated);
|
||
bufptr = buffer;
|
||
|
||
origlen = len;
|
||
|
||
while (len > 0)
|
||
{
|
||
tlen = MIN (len, 4 - (memaddr & 3));
|
||
offset = memaddr & 3;
|
||
|
||
errcode = target_xfer_memory (memaddr & ~3, buf, 4, 0);
|
||
if (errcode != 0)
|
||
goto done;
|
||
|
||
if (bufptr - buffer + tlen > buffer_allocated)
|
||
{
|
||
unsigned int bytes;
|
||
bytes = bufptr - buffer;
|
||
buffer_allocated *= 2;
|
||
buffer = xrealloc (buffer, buffer_allocated);
|
||
bufptr = buffer + bytes;
|
||
}
|
||
|
||
for (i = 0; i < tlen; i++)
|
||
{
|
||
*bufptr++ = buf[i + offset];
|
||
if (buf[i + offset] == '\000')
|
||
{
|
||
nbytes_read += i + 1;
|
||
goto done;
|
||
}
|
||
}
|
||
|
||
memaddr += tlen;
|
||
len -= tlen;
|
||
nbytes_read += tlen;
|
||
}
|
||
done:
|
||
if (errnop != NULL)
|
||
*errnop = errcode;
|
||
if (string != NULL)
|
||
*string = buffer;
|
||
return nbytes_read;
|
||
}
|
||
|
||
/* Read LEN bytes of target memory at address MEMADDR, placing the results in
|
||
GDB's memory at MYADDR. Returns either 0 for success or an errno value
|
||
if any error occurs.
|
||
|
||
If an error occurs, no guarantee is made about the contents of the data at
|
||
MYADDR. In particular, the caller should not depend upon partial reads
|
||
filling the buffer with good data. There is no way for the caller to know
|
||
how much good data might have been transfered anyway. Callers that can
|
||
deal with partial reads should call target_read_memory_partial. */
|
||
|
||
int
|
||
target_read_memory (memaddr, myaddr, len)
|
||
CORE_ADDR memaddr;
|
||
char *myaddr;
|
||
int len;
|
||
{
|
||
return target_xfer_memory (memaddr, myaddr, len, 0);
|
||
}
|
||
|
||
/* Read LEN bytes of target memory at address MEMADDR, placing the results
|
||
in GDB's memory at MYADDR. Returns a count of the bytes actually read,
|
||
and optionally an errno value in the location pointed to by ERRNOPTR
|
||
if ERRNOPTR is non-null. */
|
||
|
||
int
|
||
target_read_memory_partial (memaddr, myaddr, len, errnoptr)
|
||
CORE_ADDR memaddr;
|
||
char *myaddr;
|
||
int len;
|
||
int *errnoptr;
|
||
{
|
||
int nread; /* Number of bytes actually read. */
|
||
int errcode; /* Error from last read. */
|
||
|
||
/* First try a complete read. */
|
||
errcode = target_xfer_memory (memaddr, myaddr, len, 0);
|
||
if (errcode == 0)
|
||
{
|
||
/* Got it all. */
|
||
nread = len;
|
||
}
|
||
else
|
||
{
|
||
/* Loop, reading one byte at a time until we get as much as we can. */
|
||
for (errcode = 0, nread = 0; len > 0 && errcode == 0; nread++, len--)
|
||
{
|
||
errcode = target_xfer_memory (memaddr++, myaddr++, 1, 0);
|
||
}
|
||
/* If an error, the last read was unsuccessful, so adjust count. */
|
||
if (errcode != 0)
|
||
{
|
||
nread--;
|
||
}
|
||
}
|
||
if (errnoptr != NULL)
|
||
{
|
||
*errnoptr = errcode;
|
||
}
|
||
return (nread);
|
||
}
|
||
|
||
int
|
||
target_write_memory (memaddr, myaddr, len)
|
||
CORE_ADDR memaddr;
|
||
char *myaddr;
|
||
int len;
|
||
{
|
||
return target_xfer_memory (memaddr, myaddr, len, 1);
|
||
}
|
||
|
||
/* Move memory to or from the targets. Iterate until all of it has
|
||
been moved, if necessary. The top target gets priority; anything
|
||
it doesn't want, is offered to the next one down, etc. Note the
|
||
business with curlen: if an early target says "no, but I have a
|
||
boundary overlapping this xfer" then we shorten what we offer to
|
||
the subsequent targets so the early guy will get a chance at the
|
||
tail before the subsequent ones do.
|
||
|
||
Result is 0 or errno value. */
|
||
|
||
int
|
||
target_xfer_memory (memaddr, myaddr, len, write)
|
||
CORE_ADDR memaddr;
|
||
char *myaddr;
|
||
int len;
|
||
int write;
|
||
{
|
||
int curlen;
|
||
int res;
|
||
struct target_ops *t;
|
||
|
||
/* to_xfer_memory is not guaranteed to set errno, even when it returns
|
||
0. */
|
||
errno = 0;
|
||
|
||
/* The quick case is that the top target does it all. */
|
||
res = current_target->to_xfer_memory
|
||
(memaddr, myaddr, len, write, current_target);
|
||
if (res == len)
|
||
return 0;
|
||
|
||
if (res > 0)
|
||
goto bump;
|
||
/* If res <= 0 then we call it again in the loop. Ah well. */
|
||
|
||
for (; len > 0;)
|
||
{
|
||
curlen = len; /* Want to do it all */
|
||
for (t = current_target;
|
||
t;
|
||
t = t->to_has_all_memory? 0: t->to_next)
|
||
{
|
||
res = t->to_xfer_memory(memaddr, myaddr, curlen, write, t);
|
||
if (res > 0) break; /* Handled all or part of xfer */
|
||
if (res == 0) continue; /* Handled none */
|
||
curlen = -res; /* Could handle once we get past res bytes */
|
||
}
|
||
if (res <= 0)
|
||
{
|
||
/* If this address is for nonexistent memory,
|
||
read zeros if reading, or do nothing if writing. Return error. */
|
||
if (!write)
|
||
memset (myaddr, 0, len);
|
||
if (errno == 0)
|
||
return EIO;
|
||
else
|
||
return errno;
|
||
}
|
||
bump:
|
||
memaddr += res;
|
||
myaddr += res;
|
||
len -= res;
|
||
}
|
||
return 0; /* We managed to cover it all somehow. */
|
||
}
|
||
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
target_info (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
struct target_ops *t;
|
||
int has_all_mem = 0;
|
||
|
||
if (symfile_objfile != NULL)
|
||
printf_unfiltered ("Symbols from \"%s\".\n", symfile_objfile->name);
|
||
|
||
#ifdef FILES_INFO_HOOK
|
||
if (FILES_INFO_HOOK ())
|
||
return;
|
||
#endif
|
||
|
||
for (t = current_target;
|
||
t;
|
||
t = t->to_next)
|
||
{
|
||
if ((int)(t->to_stratum) <= (int)dummy_stratum)
|
||
continue;
|
||
if (has_all_mem)
|
||
printf_unfiltered("\tWhile running this, gdb does not access memory from...\n");
|
||
printf_unfiltered("%s:\n", t->to_longname);
|
||
(t->to_files_info)(t);
|
||
has_all_mem = t->to_has_all_memory;
|
||
}
|
||
}
|
||
|
||
/* This is to be called by the open routine before it does
|
||
anything. */
|
||
|
||
void
|
||
target_preopen (from_tty)
|
||
int from_tty;
|
||
{
|
||
dont_repeat();
|
||
|
||
if (target_has_execution)
|
||
{
|
||
if (query ("A program is being debugged already. Kill it? "))
|
||
target_kill ();
|
||
else
|
||
error ("Program not killed.");
|
||
}
|
||
|
||
/* Calling target_kill may remove the target from the stack. But if
|
||
it doesn't (which seems like a win for UDI), remove it now. */
|
||
|
||
if (target_has_execution)
|
||
pop_target ();
|
||
}
|
||
|
||
/* Detach a target after doing deferred register stores. */
|
||
|
||
void
|
||
target_detach (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
/* Handle any optimized stores to the inferior. */
|
||
#ifdef DO_DEFERRED_STORES
|
||
DO_DEFERRED_STORES;
|
||
#endif
|
||
(current_target->to_detach) (args, from_tty);
|
||
}
|
||
|
||
void
|
||
target_link (modname, t_reloc)
|
||
char *modname;
|
||
CORE_ADDR *t_reloc;
|
||
{
|
||
if (STREQ(current_target->to_shortname, "rombug"))
|
||
{
|
||
(current_target->to_lookup_symbol) (modname, t_reloc);
|
||
if (*t_reloc == 0)
|
||
error("Unable to link to %s and get relocation in rombug", modname);
|
||
}
|
||
else
|
||
*t_reloc = (CORE_ADDR)-1;
|
||
}
|
||
|
||
/* Look through the list of possible targets for a target that can
|
||
execute a run or attach command without any other data. This is
|
||
used to locate the default process stratum.
|
||
|
||
Result is always valid (error() is called for errors). */
|
||
|
||
static struct target_ops *
|
||
find_default_run_target (do_mesg)
|
||
char *do_mesg;
|
||
{
|
||
struct target_ops **t;
|
||
struct target_ops *runable = NULL;
|
||
int count;
|
||
|
||
count = 0;
|
||
|
||
for (t = target_structs; t < target_structs + target_struct_size;
|
||
++t)
|
||
{
|
||
if (target_can_run(*t))
|
||
{
|
||
runable = *t;
|
||
++count;
|
||
}
|
||
}
|
||
|
||
if (count != 1)
|
||
error ("Don't know how to %s. Try \"help target\".", do_mesg);
|
||
|
||
return runable;
|
||
}
|
||
|
||
void
|
||
find_default_attach (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
struct target_ops *t;
|
||
|
||
t = find_default_run_target("attach");
|
||
(t->to_attach) (args, from_tty);
|
||
return;
|
||
}
|
||
|
||
void
|
||
find_default_create_inferior (exec_file, allargs, env)
|
||
char *exec_file;
|
||
char *allargs;
|
||
char **env;
|
||
{
|
||
struct target_ops *t;
|
||
|
||
t = find_default_run_target("run");
|
||
(t->to_create_inferior) (exec_file, allargs, env);
|
||
return;
|
||
}
|
||
|
||
static int
|
||
return_zero ()
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
struct target_ops *
|
||
find_core_target ()
|
||
{
|
||
struct target_ops **t;
|
||
struct target_ops *runable = NULL;
|
||
int count;
|
||
|
||
count = 0;
|
||
|
||
for (t = target_structs; t < target_structs + target_struct_size;
|
||
++t)
|
||
{
|
||
if ((*t)->to_stratum == core_stratum)
|
||
{
|
||
runable = *t;
|
||
++count;
|
||
}
|
||
}
|
||
|
||
return(count == 1 ? runable : NULL);
|
||
}
|
||
|
||
/* The inferior process has died. Long live the inferior! */
|
||
|
||
void
|
||
generic_mourn_inferior ()
|
||
{
|
||
inferior_pid = 0;
|
||
attach_flag = 0;
|
||
breakpoint_init_inferior ();
|
||
registers_changed ();
|
||
|
||
#ifdef CLEAR_DEFERRED_STORES
|
||
/* Delete any pending stores to the inferior... */
|
||
CLEAR_DEFERRED_STORES;
|
||
#endif
|
||
|
||
reopen_exec_file ();
|
||
reinit_frame_cache ();
|
||
|
||
/* 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 ();
|
||
}
|
||
|
||
/* This table must match in order and size the signals in enum target_signal
|
||
in target.h. */
|
||
static struct {
|
||
char *name;
|
||
char *string;
|
||
} signals [] =
|
||
{
|
||
{"0", "Signal 0"},
|
||
{"SIGHUP", "Hangup"},
|
||
{"SIGINT", "Interrupt"},
|
||
{"SIGQUIT", "Quit"},
|
||
{"SIGILL", "Illegal instruction"},
|
||
{"SIGTRAP", "Trace/breakpoint trap"},
|
||
{"SIGABRT", "Aborted"},
|
||
{"SIGEMT", "Emulation trap"},
|
||
{"SIGFPE", "Arithmetic exception"},
|
||
{"SIGKILL", "Killed"},
|
||
{"SIGBUS", "Bus error"},
|
||
{"SIGSEGV", "Segmentation fault"},
|
||
{"SIGSYS", "Bad system call"},
|
||
{"SIGPIPE", "Broken pipe"},
|
||
{"SIGALRM", "Alarm clock"},
|
||
{"SIGTERM", "Terminated"},
|
||
{"SIGURG", "Urgent I/O condition"},
|
||
{"SIGSTOP", "Stopped (signal)"},
|
||
{"SIGTSTP", "Stopped (user)"},
|
||
{"SIGCONT", "Continued"},
|
||
{"SIGCHLD", "Child status changed"},
|
||
{"SIGTTIN", "Stopped (tty input)"},
|
||
{"SIGTTOU", "Stopped (tty output)"},
|
||
{"SIGIO", "I/O possible"},
|
||
{"SIGXCPU", "CPU time limit exceeded"},
|
||
{"SIGXFSZ", "File size limit exceeded"},
|
||
{"SIGVTALRM", "Virtual timer expired"},
|
||
{"SIGPROF", "Profiling timer expired"},
|
||
{"SIGWINCH", "Window size changed"},
|
||
{"SIGLOST", "Resource lost"},
|
||
{"SIGUSR1", "User defined signal 1"},
|
||
{"SIGUSR2", "User defined signal 2"},
|
||
{"SIGPWR", "Power fail/restart"},
|
||
{"SIGPOLL", "Pollable event occurred"},
|
||
{"SIGWIND", "SIGWIND"},
|
||
{"SIGPHONE", "SIGPHONE"},
|
||
{"SIGWAITING", "Process's LWPs are blocked"},
|
||
{"SIGLWP", "Signal LWP"},
|
||
{"SIGDANGER", "Swap space dangerously low"},
|
||
{"SIGGRANT", "Monitor mode granted"},
|
||
{"SIGRETRACT", "Need to relinguish monitor mode"},
|
||
{"SIGMSG", "Monitor mode data available"},
|
||
{"SIGSOUND", "Sound completed"},
|
||
{"SIGSAK", "Secure attention"},
|
||
{NULL, "Unknown signal"},
|
||
{NULL, "Internal error: printing TARGET_SIGNAL_DEFAULT"},
|
||
|
||
/* Last entry, used to check whether the table is the right size. */
|
||
{NULL, "TARGET_SIGNAL_MAGIC"}
|
||
};
|
||
|
||
/* Return the string for a signal. */
|
||
char *
|
||
target_signal_to_string (sig)
|
||
enum target_signal sig;
|
||
{
|
||
return signals[sig].string;
|
||
}
|
||
|
||
/* Return the name for a signal. */
|
||
char *
|
||
target_signal_to_name (sig)
|
||
enum target_signal sig;
|
||
{
|
||
if (sig == TARGET_SIGNAL_UNKNOWN)
|
||
/* I think the code which prints this will always print it along with
|
||
the string, so no need to be verbose. */
|
||
return "?";
|
||
return signals[sig].name;
|
||
}
|
||
|
||
/* Given a name, return its signal. */
|
||
enum target_signal
|
||
target_signal_from_name (name)
|
||
char *name;
|
||
{
|
||
enum target_signal sig;
|
||
|
||
/* It's possible we also should allow "SIGCLD" as well as "SIGCHLD"
|
||
for TARGET_SIGNAL_SIGCHLD. SIGIOT, on the other hand, is more
|
||
questionable; seems like by now people should call it SIGABRT
|
||
instead. */
|
||
|
||
/* This ugly cast brought to you by the native VAX compiler. */
|
||
for (sig = TARGET_SIGNAL_HUP;
|
||
signals[sig].name != NULL;
|
||
sig = (enum target_signal)((int)sig + 1))
|
||
if (STREQ (name, signals[sig].name))
|
||
return sig;
|
||
return TARGET_SIGNAL_UNKNOWN;
|
||
}
|
||
|
||
/* The following functions are to help certain targets deal
|
||
with the signal/waitstatus stuff. They could just as well be in
|
||
a file called native-utils.c or unixwaitstatus-utils.c or whatever. */
|
||
|
||
/* Convert host signal to our signals. */
|
||
enum target_signal
|
||
target_signal_from_host (hostsig)
|
||
int hostsig;
|
||
{
|
||
/* A switch statement would make sense but would require special kludges
|
||
to deal with the cases where more than one signal has the same number. */
|
||
|
||
if (hostsig == 0) return TARGET_SIGNAL_0;
|
||
|
||
#if defined (SIGHUP)
|
||
if (hostsig == SIGHUP) return TARGET_SIGNAL_HUP;
|
||
#endif
|
||
#if defined (SIGINT)
|
||
if (hostsig == SIGINT) return TARGET_SIGNAL_INT;
|
||
#endif
|
||
#if defined (SIGQUIT)
|
||
if (hostsig == SIGQUIT) return TARGET_SIGNAL_QUIT;
|
||
#endif
|
||
#if defined (SIGILL)
|
||
if (hostsig == SIGILL) return TARGET_SIGNAL_ILL;
|
||
#endif
|
||
#if defined (SIGTRAP)
|
||
if (hostsig == SIGTRAP) return TARGET_SIGNAL_TRAP;
|
||
#endif
|
||
#if defined (SIGABRT)
|
||
if (hostsig == SIGABRT) return TARGET_SIGNAL_ABRT;
|
||
#endif
|
||
#if defined (SIGEMT)
|
||
if (hostsig == SIGEMT) return TARGET_SIGNAL_EMT;
|
||
#endif
|
||
#if defined (SIGFPE)
|
||
if (hostsig == SIGFPE) return TARGET_SIGNAL_FPE;
|
||
#endif
|
||
#if defined (SIGKILL)
|
||
if (hostsig == SIGKILL) return TARGET_SIGNAL_KILL;
|
||
#endif
|
||
#if defined (SIGBUS)
|
||
if (hostsig == SIGBUS) return TARGET_SIGNAL_BUS;
|
||
#endif
|
||
#if defined (SIGSEGV)
|
||
if (hostsig == SIGSEGV) return TARGET_SIGNAL_SEGV;
|
||
#endif
|
||
#if defined (SIGSYS)
|
||
if (hostsig == SIGSYS) return TARGET_SIGNAL_SYS;
|
||
#endif
|
||
#if defined (SIGPIPE)
|
||
if (hostsig == SIGPIPE) return TARGET_SIGNAL_PIPE;
|
||
#endif
|
||
#if defined (SIGALRM)
|
||
if (hostsig == SIGALRM) return TARGET_SIGNAL_ALRM;
|
||
#endif
|
||
#if defined (SIGTERM)
|
||
if (hostsig == SIGTERM) return TARGET_SIGNAL_TERM;
|
||
#endif
|
||
#if defined (SIGUSR1)
|
||
if (hostsig == SIGUSR1) return TARGET_SIGNAL_USR1;
|
||
#endif
|
||
#if defined (SIGUSR2)
|
||
if (hostsig == SIGUSR2) return TARGET_SIGNAL_USR2;
|
||
#endif
|
||
#if defined (SIGCLD)
|
||
if (hostsig == SIGCLD) return TARGET_SIGNAL_CHLD;
|
||
#endif
|
||
#if defined (SIGCHLD)
|
||
if (hostsig == SIGCHLD) return TARGET_SIGNAL_CHLD;
|
||
#endif
|
||
#if defined (SIGPWR)
|
||
if (hostsig == SIGPWR) return TARGET_SIGNAL_PWR;
|
||
#endif
|
||
#if defined (SIGWINCH)
|
||
if (hostsig == SIGWINCH) return TARGET_SIGNAL_WINCH;
|
||
#endif
|
||
#if defined (SIGURG)
|
||
if (hostsig == SIGURG) return TARGET_SIGNAL_URG;
|
||
#endif
|
||
#if defined (SIGIO)
|
||
if (hostsig == SIGIO) return TARGET_SIGNAL_IO;
|
||
#endif
|
||
#if defined (SIGPOLL)
|
||
if (hostsig == SIGPOLL) return TARGET_SIGNAL_POLL;
|
||
#endif
|
||
#if defined (SIGSTOP)
|
||
if (hostsig == SIGSTOP) return TARGET_SIGNAL_STOP;
|
||
#endif
|
||
#if defined (SIGTSTP)
|
||
if (hostsig == SIGTSTP) return TARGET_SIGNAL_TSTP;
|
||
#endif
|
||
#if defined (SIGCONT)
|
||
if (hostsig == SIGCONT) return TARGET_SIGNAL_CONT;
|
||
#endif
|
||
#if defined (SIGTTIN)
|
||
if (hostsig == SIGTTIN) return TARGET_SIGNAL_TTIN;
|
||
#endif
|
||
#if defined (SIGTTOU)
|
||
if (hostsig == SIGTTOU) return TARGET_SIGNAL_TTOU;
|
||
#endif
|
||
#if defined (SIGVTALRM)
|
||
if (hostsig == SIGVTALRM) return TARGET_SIGNAL_VTALRM;
|
||
#endif
|
||
#if defined (SIGPROF)
|
||
if (hostsig == SIGPROF) return TARGET_SIGNAL_PROF;
|
||
#endif
|
||
#if defined (SIGXCPU)
|
||
if (hostsig == SIGXCPU) return TARGET_SIGNAL_XCPU;
|
||
#endif
|
||
#if defined (SIGXFSZ)
|
||
if (hostsig == SIGXFSZ) return TARGET_SIGNAL_XFSZ;
|
||
#endif
|
||
#if defined (SIGWIND)
|
||
if (hostsig == SIGWIND) return TARGET_SIGNAL_WIND;
|
||
#endif
|
||
#if defined (SIGPHONE)
|
||
if (hostsig == SIGPHONE) return TARGET_SIGNAL_PHONE;
|
||
#endif
|
||
#if defined (SIGLOST)
|
||
if (hostsig == SIGLOST) return TARGET_SIGNAL_LOST;
|
||
#endif
|
||
#if defined (SIGWAITING)
|
||
if (hostsig == SIGWAITING) return TARGET_SIGNAL_WAITING;
|
||
#endif
|
||
#if defined (SIGLWP)
|
||
if (hostsig == SIGLWP) return TARGET_SIGNAL_LWP;
|
||
#endif
|
||
#if defined (SIGDANGER)
|
||
if (hostsig == SIGDANGER) return TARGET_SIGNAL_DANGER;
|
||
#endif
|
||
#if defined (SIGGRANT)
|
||
if (hostsig == SIGGRANT) return TARGET_SIGNAL_GRANT;
|
||
#endif
|
||
#if defined (SIGRETRACT)
|
||
if (hostsig == SIGRETRACT) return TARGET_SIGNAL_RETRACT;
|
||
#endif
|
||
#if defined (SIGMSG)
|
||
if (hostsig == SIGMSG) return TARGET_SIGNAL_MSG;
|
||
#endif
|
||
#if defined (SIGSOUND)
|
||
if (hostsig == SIGSOUND) return TARGET_SIGNAL_SOUND;
|
||
#endif
|
||
#if defined (SIGSAK)
|
||
if (hostsig == SIGSAK) return TARGET_SIGNAL_SAK;
|
||
#endif
|
||
return TARGET_SIGNAL_UNKNOWN;
|
||
}
|
||
|
||
int
|
||
target_signal_to_host (oursig)
|
||
enum target_signal oursig;
|
||
{
|
||
switch (oursig)
|
||
{
|
||
case TARGET_SIGNAL_0: return 0;
|
||
|
||
#if defined (SIGHUP)
|
||
case TARGET_SIGNAL_HUP: return SIGHUP;
|
||
#endif
|
||
#if defined (SIGINT)
|
||
case TARGET_SIGNAL_INT: return SIGINT;
|
||
#endif
|
||
#if defined (SIGQUIT)
|
||
case TARGET_SIGNAL_QUIT: return SIGQUIT;
|
||
#endif
|
||
#if defined (SIGILL)
|
||
case TARGET_SIGNAL_ILL: return SIGILL;
|
||
#endif
|
||
#if defined (SIGTRAP)
|
||
case TARGET_SIGNAL_TRAP: return SIGTRAP;
|
||
#endif
|
||
#if defined (SIGABRT)
|
||
case TARGET_SIGNAL_ABRT: return SIGABRT;
|
||
#endif
|
||
#if defined (SIGEMT)
|
||
case TARGET_SIGNAL_EMT: return SIGEMT;
|
||
#endif
|
||
#if defined (SIGFPE)
|
||
case TARGET_SIGNAL_FPE: return SIGFPE;
|
||
#endif
|
||
#if defined (SIGKILL)
|
||
case TARGET_SIGNAL_KILL: return SIGKILL;
|
||
#endif
|
||
#if defined (SIGBUS)
|
||
case TARGET_SIGNAL_BUS: return SIGBUS;
|
||
#endif
|
||
#if defined (SIGSEGV)
|
||
case TARGET_SIGNAL_SEGV: return SIGSEGV;
|
||
#endif
|
||
#if defined (SIGSYS)
|
||
case TARGET_SIGNAL_SYS: return SIGSYS;
|
||
#endif
|
||
#if defined (SIGPIPE)
|
||
case TARGET_SIGNAL_PIPE: return SIGPIPE;
|
||
#endif
|
||
#if defined (SIGALRM)
|
||
case TARGET_SIGNAL_ALRM: return SIGALRM;
|
||
#endif
|
||
#if defined (SIGTERM)
|
||
case TARGET_SIGNAL_TERM: return SIGTERM;
|
||
#endif
|
||
#if defined (SIGUSR1)
|
||
case TARGET_SIGNAL_USR1: return SIGUSR1;
|
||
#endif
|
||
#if defined (SIGUSR2)
|
||
case TARGET_SIGNAL_USR2: return SIGUSR2;
|
||
#endif
|
||
#if defined (SIGCHLD) || defined (SIGCLD)
|
||
case TARGET_SIGNAL_CHLD:
|
||
#if defined (SIGCHLD)
|
||
return SIGCHLD;
|
||
#else
|
||
return SIGCLD;
|
||
#endif
|
||
#endif /* SIGCLD or SIGCHLD */
|
||
#if defined (SIGPWR)
|
||
case TARGET_SIGNAL_PWR: return SIGPWR;
|
||
#endif
|
||
#if defined (SIGWINCH)
|
||
case TARGET_SIGNAL_WINCH: return SIGWINCH;
|
||
#endif
|
||
#if defined (SIGURG)
|
||
case TARGET_SIGNAL_URG: return SIGURG;
|
||
#endif
|
||
#if defined (SIGIO)
|
||
case TARGET_SIGNAL_IO: return SIGIO;
|
||
#endif
|
||
#if defined (SIGPOLL)
|
||
case TARGET_SIGNAL_POLL: return SIGPOLL;
|
||
#endif
|
||
#if defined (SIGSTOP)
|
||
case TARGET_SIGNAL_STOP: return SIGSTOP;
|
||
#endif
|
||
#if defined (SIGTSTP)
|
||
case TARGET_SIGNAL_TSTP: return SIGTSTP;
|
||
#endif
|
||
#if defined (SIGCONT)
|
||
case TARGET_SIGNAL_CONT: return SIGCONT;
|
||
#endif
|
||
#if defined (SIGTTIN)
|
||
case TARGET_SIGNAL_TTIN: return SIGTTIN;
|
||
#endif
|
||
#if defined (SIGTTOU)
|
||
case TARGET_SIGNAL_TTOU: return SIGTTOU;
|
||
#endif
|
||
#if defined (SIGVTALRM)
|
||
case TARGET_SIGNAL_VTALRM: return SIGVTALRM;
|
||
#endif
|
||
#if defined (SIGPROF)
|
||
case TARGET_SIGNAL_PROF: return SIGPROF;
|
||
#endif
|
||
#if defined (SIGXCPU)
|
||
case TARGET_SIGNAL_XCPU: return SIGXCPU;
|
||
#endif
|
||
#if defined (SIGXFSZ)
|
||
case TARGET_SIGNAL_XFSZ: return SIGXFSZ;
|
||
#endif
|
||
#if defined (SIGWIND)
|
||
case TARGET_SIGNAL_WIND: return SIGWIND;
|
||
#endif
|
||
#if defined (SIGPHONE)
|
||
case TARGET_SIGNAL_PHONE: return SIGPHONE;
|
||
#endif
|
||
#if defined (SIGLOST)
|
||
case TARGET_SIGNAL_LOST: return SIGLOST;
|
||
#endif
|
||
#if defined (SIGWAITING)
|
||
case TARGET_SIGNAL_WAITING: return SIGWAITING;
|
||
#endif
|
||
#if defined (SIGLWP)
|
||
case TARGET_SIGNAL_LWP: return SIGLWP;
|
||
#endif
|
||
#if defined (SIGDANGER)
|
||
case TARGET_SIGNAL_DANGER: return SIGDANGER;
|
||
#endif
|
||
#if defined (SIGGRANT)
|
||
case TARGET_SIGNAL_GRANT: return SIGGRANT;
|
||
#endif
|
||
#if defined (SIGRETRACT)
|
||
case TARGET_SIGNAL_RETRACT: return SIGRETRACT;
|
||
#endif
|
||
#if defined (SIGMSG)
|
||
case TARGET_SIGNAL_MSG: return SIGMSG;
|
||
#endif
|
||
#if defined (SIGSOUND)
|
||
case TARGET_SIGNAL_SOUND: return SIGSOUND;
|
||
#endif
|
||
#if defined (SIGSAK)
|
||
case TARGET_SIGNAL_SAK: return SIGSAK;
|
||
#endif
|
||
default:
|
||
/* The user might be trying to do "signal SIGSAK" where this system
|
||
doesn't have SIGSAK. */
|
||
warning ("Signal %s does not exist on this system.\n",
|
||
target_signal_to_name (oursig));
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
/* Helper function for child_wait and the Lynx derivatives of child_wait.
|
||
HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
|
||
translation of that in OURSTATUS. */
|
||
void
|
||
store_waitstatus (ourstatus, hoststatus)
|
||
struct target_waitstatus *ourstatus;
|
||
int hoststatus;
|
||
{
|
||
#ifdef CHILD_SPECIAL_WAITSTATUS
|
||
/* CHILD_SPECIAL_WAITSTATUS should return nonzero and set *OURSTATUS
|
||
if it wants to deal with hoststatus. */
|
||
if (CHILD_SPECIAL_WAITSTATUS (ourstatus, hoststatus))
|
||
return;
|
||
#endif
|
||
|
||
if (WIFEXITED (hoststatus))
|
||
{
|
||
ourstatus->kind = TARGET_WAITKIND_EXITED;
|
||
ourstatus->value.integer = WEXITSTATUS (hoststatus);
|
||
}
|
||
else if (!WIFSTOPPED (hoststatus))
|
||
{
|
||
ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
|
||
ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus));
|
||
}
|
||
else
|
||
{
|
||
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
||
ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus));
|
||
}
|
||
}
|
||
|
||
|
||
/* Convert a normal process ID to a string. Returns the string in a static
|
||
buffer. */
|
||
|
||
char *
|
||
normal_pid_to_str (pid)
|
||
int pid;
|
||
{
|
||
static char buf[30];
|
||
|
||
sprintf (buf, "process %d", pid);
|
||
|
||
return buf;
|
||
}
|
||
|
||
static char targ_desc[] =
|
||
"Names of targets and files being debugged.\n\
|
||
Shows the entire stack of targets currently in use (including the exec-file,\n\
|
||
core-file, and process, if any), as well as the symbol file name.";
|
||
|
||
void
|
||
_initialize_targets ()
|
||
{
|
||
current_target = &dummy_target;
|
||
cleanup_target (current_target);
|
||
|
||
add_info ("target", target_info, targ_desc);
|
||
add_info ("files", target_info, targ_desc);
|
||
|
||
if (!STREQ (signals[TARGET_SIGNAL_LAST].string, "TARGET_SIGNAL_MAGIC"))
|
||
abort ();
|
||
}
|