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- /* 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
- target_info PARAMS ((char *, int));
-
- static void
- cleanup_target PARAMS ((struct target_ops *));
-
- static void
- maybe_kill_then_create_inferior PARAMS ((char *, char *, char **));
-
- static void
- maybe_kill_then_attach PARAMS ((char *, int));
-
- static void
- kill_or_be_killed PARAMS ((int));
-
- static void
- default_terminal_info PARAMS ((char *, int));
-
- static int
- nosymbol PARAMS ((char *, CORE_ADDR *));
-
- static void
- tcomplain PARAMS ((void));
-
- static int
- nomemory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
-
- static int
- return_zero PARAMS ((void));
-
- static void
- ignore PARAMS ((void));
-
- static void
- target_command PARAMS ((char *, int));
-
- static struct target_ops *
- find_default_run_target PARAMS ((char *));
-
- /* Pointer to array of target architecture structures; the size of the
- array; the current index into the array; the allocated size of the
- array. */
- struct target_ops **target_structs;
- unsigned target_struct_size;
- unsigned target_struct_index;
- unsigned target_struct_allocsize;
- #define DEFAULT_ALLOCSIZE 10
-
- /* The initial current target, so that there is always a semi-valid
- current target. */
-
- struct target_ops dummy_target = {
- "None", /* to_shortname */
- "None", /* to_longname */
- "", /* to_doc */
- 0, /* to_open */
- 0, /* to_close */
- find_default_attach, /* to_attach */
- 0, /* to_detach */
- 0, /* to_resume */
- 0, /* to_wait */
- 0, /* to_fetch_registers */
- 0, /* to_store_registers */
- 0, /* to_prepare_to_store */
- 0, /* to_xfer_memory */
- 0, /* to_files_info */
- 0, /* to_insert_breakpoint */
- 0, /* to_remove_breakpoint */
- 0, /* to_terminal_init */
- 0, /* to_terminal_inferior */
- 0, /* to_terminal_ours_for_output */
- 0, /* to_terminal_ours */
- 0, /* to_terminal_info */
- 0, /* to_kill */
- 0, /* to_load */
- 0, /* to_lookup_symbol */
- find_default_create_inferior, /* to_create_inferior */
- 0, /* to_mourn_inferior */
- 0, /* to_can_run */
- 0, /* to_notice_signals */
- 0, /* to_stop */
- dummy_stratum, /* to_stratum */
- 0, /* to_next */
- 0, /* to_next */
- 0, /* to_has_all_memory */
- 0, /* to_has_memory */
- 0, /* to_has_registers */
- 0, /* to_has_execution */
- 0, /* to_sections */
- 0, /* to_sections_end */
- OPS_MAGIC, /* to_magic */
- };
-
- /* Top of target stack. */
-
- struct target_stack_item *target_stack;
-
- /* The target structure we are currently using to talk to a process
- or file or whatever "inferior" we have. */
-
- struct target_ops current_target;
-
- /* 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 */
- static void
- 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 (!target_structs)
- {
- target_struct_allocsize = DEFAULT_ALLOCSIZE;
- target_structs = (struct target_ops **) xmalloc
- (target_struct_allocsize * sizeof (*target_structs));
- }
- if (target_struct_size >= target_struct_allocsize)
- {
- target_struct_allocsize *= 2;
- target_structs = (struct target_ops **)
- xrealloc ((char *) target_structs,
- target_struct_allocsize * sizeof (*target_structs));
- }
- target_structs[target_struct_size++] = t;
- /* cleanup_target (t);*/
-
- if (targetlist == NULL)
- add_prefix_cmd ("target", class_run, target_command,
- "Connect to a target machine or process.\n\
- The first argument is the type or protocol of the target machine.\n\
- Remaining arguments are interpreted by the target protocol. For more\n\
- information on the arguments for a particular protocol, type\n\
- `help target ' followed by the protocol name.",
- &targetlist, "target ", 0, &cmdlist);
- add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist);
- }
-
- /* Stub functions */
-
- static void
- ignore ()
- {
- }
-
- /* ARGSUSED */
- static int
- nomemory (memaddr, myaddr, len, write, t)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
- struct target_ops *t;
- {
- errno = EIO; /* Can't read/write this location */
- return 0; /* No bytes handled */
- }
-
- static void
- tcomplain ()
- {
- error ("You can't do that when your target is `%s'",
- current_target.to_shortname);
- }
-
- void
- noprocess ()
- {
- error ("You can't do that without a process to debug");
- }
-
- /* ARGSUSED */
- static int
- nosymbol (name, addrp)
- char *name;
- CORE_ADDR *addrp;
- {
- return 1; /* Symbol does not exist in target env */
- }
-
- /* ARGSUSED */
- static void
- default_terminal_info (args, from_tty)
- char *args;
- int from_tty;
- {
- printf_unfiltered("No saved terminal information.\n");
- }
-
- /* 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
- 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;
- {
-
- #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_stop, (void (*)())ignore);
-
- #undef de_fault
- }
-
- /* Go through the target stack from top to bottom, copying over zero entries in
- current_target. In effect, we are doing class inheritance through the
- pushed target vectors. */
-
- static void
- update_current_target ()
- {
- struct target_stack_item *item;
- struct target_ops *t;
-
- /* First, reset current_target */
- memset (¤t_target, 0, sizeof current_target);
-
- for (item = target_stack; item; item = item->next)
- {
- t = item->target_ops;
-
- #define INHERIT(FIELD, TARGET) \
- if (!current_target.FIELD) \
- current_target.FIELD = TARGET->FIELD
-
- INHERIT (to_shortname, t);
- INHERIT (to_longname, t);
- INHERIT (to_doc, t);
- INHERIT (to_open, t);
- INHERIT (to_close, t);
- INHERIT (to_attach, t);
- INHERIT (to_detach, t);
- INHERIT (to_resume, t);
- INHERIT (to_wait, t);
- INHERIT (to_fetch_registers, t);
- INHERIT (to_store_registers, t);
- INHERIT (to_prepare_to_store, t);
- INHERIT (to_xfer_memory, t);
- INHERIT (to_files_info, t);
- INHERIT (to_insert_breakpoint, t);
- INHERIT (to_remove_breakpoint, t);
- INHERIT (to_terminal_init, t);
- INHERIT (to_terminal_inferior, t);
- INHERIT (to_terminal_ours_for_output, t);
- INHERIT (to_terminal_ours, t);
- INHERIT (to_terminal_info, t);
- INHERIT (to_kill, t);
- INHERIT (to_load, t);
- INHERIT (to_lookup_symbol, t);
- INHERIT (to_create_inferior, t);
- INHERIT (to_mourn_inferior, t);
- INHERIT (to_can_run, t);
- INHERIT (to_notice_signals, t);
- INHERIT (to_stop, t);
- INHERIT (to_stratum, t);
- INHERIT (DONT_USE, t);
- INHERIT (to_has_all_memory, t);
- INHERIT (to_has_memory, t);
- INHERIT (to_has_stack, t);
- INHERIT (to_has_registers, t);
- INHERIT (to_has_execution, t);
- INHERIT (to_sections, t);
- INHERIT (to_sections_end, t);
- INHERIT (to_magic, t);
-
- #undef INHERIT
- }
- }
-
- /* 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_stack_item *cur, *prev, *tmp;
-
- /* 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();
- }
-
- /* Find the proper stratum to install this target in. */
-
- for (prev = NULL, cur = target_stack; cur; prev = cur, cur = cur->next)
- {
- if ((int)(t->to_stratum) >= (int)(cur->target_ops->to_stratum))
- break;
- }
-
- /* If there's already targets at this stratum, remove them. */
-
- if (cur)
- while (t->to_stratum == cur->target_ops->to_stratum)
- {
- /* There's already something on this stratum. Close it off. */
- (cur->target_ops->to_close) (0);
- if (prev)
- prev->next = cur->next; /* Unchain old target_ops */
- else
- target_stack = cur->next; /* Unchain first on list */
- tmp = cur->next;
- free (cur);
- cur = tmp;
- }
-
- /* We have removed all targets in our stratum, now add the new one. */
-
- tmp = (struct target_stack_item *)
- xmalloc (sizeof (struct target_stack_item));
- tmp->next = cur;
- tmp->target_ops = t;
-
- if (prev)
- prev->next = tmp;
- else
- target_stack = tmp;
-
- update_current_target ();
-
- cleanup_target (¤t_target); /* Fill in the gaps */
- 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). */
-
- int
- unpush_target (t)
- struct target_ops *t;
- {
- struct target_stack_item *cur, *prev;
-
- if (t->to_close)
- t->to_close (0); /* Let it clean up */
-
- /* Look for the specified target. Note that we assume that a target
- can only occur once in the target stack. */
-
- for (cur = target_stack, prev = NULL; cur; prev = cur, cur = cur->next)
- if (cur->target_ops == t)
- break;
-
- if (!cur)
- return 0; /* Didn't find target_ops, quit now */
-
- /* Unchain the target */
-
- if (!prev)
- target_stack = cur->next;
- else
- prev->next = cur->next;
-
- free (cur); /* Release the target_stack_item */
-
- update_current_target ();
- cleanup_target (¤t_target);
-
- return 1;
- }
-
- void
- pop_target ()
- {
- (current_target.to_close)(0); /* Let it clean up */
- if (unpush_target (target_stack->target_ops) == 1)
- return;
-
- fprintf_unfiltered(gdb_stderr,
- "pop_target couldn't find target %s\n",
- current_target.to_shortname);
- abort();
- }
-
- #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;
- struct target_stack_item *item;
-
- /* 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, ¤t_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 (item = target_stack; item; item = item->next)
- {
- t = item->target_ops;
- if (!t->to_has_memory)
- continue;
-
- res = t->to_xfer_memory (memaddr, myaddr, curlen, write, t);
- if (res > 0)
- break; /* Handled all or part of xfer */
- if (t->to_has_all_memory)
- break;
- }
-
- 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;
- struct target_stack_item *item;
- 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 (item = target_stack; item; item = item->next)
- {
- t = item->target_ops;
-
- if (!t->to_has_memory)
- continue;
-
- 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 ((*t)->to_can_run && 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 ()
- {
- extern int show_breakpoint_hit_counts;
-
- 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. */
- /* However, it is more confusing for the ignore counts to disappear when
- using hit counts. So don't clear them if we're counting hits. */
- if (!show_breakpoint_hit_counts)
- 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"},
- {"SIGPRIO", "SIGPRIO"},
- {"SIG33", "Real-time event 33"},
- {"SIG34", "Real-time event 34"},
- {"SIG35", "Real-time event 35"},
- {"SIG36", "Real-time event 36"},
- {"SIG37", "Real-time event 37"},
- {"SIG38", "Real-time event 38"},
- {"SIG39", "Real-time event 39"},
- {"SIG40", "Real-time event 40"},
- {"SIG41", "Real-time event 41"},
- {"SIG42", "Real-time event 42"},
- {"SIG43", "Real-time event 43"},
- {"SIG44", "Real-time event 44"},
- {"SIG45", "Real-time event 45"},
- {"SIG46", "Real-time event 46"},
- {"SIG47", "Real-time event 47"},
- {"SIG48", "Real-time event 48"},
- {"SIG49", "Real-time event 49"},
- {"SIG50", "Real-time event 50"},
- {"SIG51", "Real-time event 51"},
- {"SIG52", "Real-time event 52"},
- {"SIG53", "Real-time event 53"},
- {"SIG54", "Real-time event 54"},
- {"SIG55", "Real-time event 55"},
- {"SIG56", "Real-time event 56"},
- {"SIG57", "Real-time event 57"},
- {"SIG58", "Real-time event 58"},
- {"SIG59", "Real-time event 59"},
- {"SIG60", "Real-time event 60"},
- {"SIG61", "Real-time event 61"},
- {"SIG62", "Real-time event 62"},
- {"SIG63", "Real-time event 63"},
-
- {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
- #if defined (SIGPRIO)
- if (hostsig == SIGPRIO) return TARGET_SIGNAL_PRIO;
- #endif
- #if defined (REALTIME_LO)
- if (hostsig >= REALTIME_LO && hostsig < REALTIME_HI)
- return (enum target_signal)
- (hostsig - 33 + (int) TARGET_SIGNAL_REALTIME_33);
- #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
- #if defined (SIGPRIO)
- case TARGET_SIGNAL_PRIO: return SIGPRIO;
- #endif
- default:
- #if defined (REALTIME_LO)
- if (oursig >= TARGET_SIGNAL_REALTIME_33
- && oursig <= TARGET_SIGNAL_REALTIME_63)
- {
- int retsig =
- (int)oursig - (int)TARGET_SIGNAL_REALTIME_33 + REALTIME_LO;
- if (retsig < REALTIME_HI)
- return retsig;
- }
- #endif
- /* 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));
- }
- }
-
- /* In some circumstances we allow a command to specify a numeric
- signal. The idea is to keep these circumstances limited so that
- users (and scripts) develop portable habits. For comparison,
- POSIX.2 `kill' requires that 1,2,3,6,9,14, and 15 work (and using a
- numeric signal at all is obscelescent. We are slightly more
- lenient and allow 1-15 which should match host signal numbers on
- most systems. Use of symbolic signal names is strongly encouraged. */
-
- enum target_signal
- target_signal_from_command (num)
- int num;
- {
- if (num >= 1 && num <= 15)
- return (enum target_signal)num;
- error ("Only signals 1-15 are valid as numeric signals.\n\
- Use \"info signals\" for a list of symbolic signals.");
- }
-
- /* Returns zero to leave the inferior alone, one to interrupt it. */
- int (*target_activity_function) PARAMS ((void));
- int target_activity_fd;
-
- /* 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];
-
- if (STREQ (current_target.to_shortname, "remote"))
- sprintf (buf, "thread %d", pid);
- else
- 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 ()
- {
- push_target (&dummy_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 ();
- }
-