46d185d3d1
the callers of symbol_file_add. Gets rid of heuristic fence-post warnings on mips and alpha targets when the PC resides in a shared library which is not yet read in. * coff-solib.c (coff_solib_add), cxux-nat.c (add_shared_symbol_files), irix5-nat.c (solib_add), osfsolib.c (solib_add), remote-vx.c (vx_open), solib.c (solib_add): Add call to reinit_frame_cache after all shared libraries are read in. * remote-udi.c (udi_load), remote-vx.c (vx_load_command), symfile.c (symbol_file_command, add_symbol_file_command): Add call to reinit_frame_cache after symbol_file_add.
1347 lines
36 KiB
C
1347 lines
36 KiB
C
/* Memory-access and commands for remote VxWorks processes, for GDB.
|
||
Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
|
||
Contributed by Wind River Systems and 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 "frame.h"
|
||
#include "inferior.h"
|
||
#include "wait.h"
|
||
#include "target.h"
|
||
#include "gdbcore.h"
|
||
#include "command.h"
|
||
#include "symtab.h"
|
||
#include "complaints.h"
|
||
#include "gdbcmd.h"
|
||
|
||
#include <string.h>
|
||
#include <errno.h>
|
||
#include <signal.h>
|
||
#include <fcntl.h>
|
||
#include <sys/types.h>
|
||
#include <sys/socket.h>
|
||
#define malloc bogon_malloc /* Sun claims "char *malloc()" not void * */
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||
#define free bogon_free /* Sun claims "int free()" not void */
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||
#define realloc bogon_realloc /* Sun claims "char *realloc()", not void * */
|
||
#include <rpc/rpc.h>
|
||
#undef malloc
|
||
#undef free
|
||
#undef realloc
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||
#include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */
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||
#include <netdb.h>
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||
#include "vx-share/ptrace.h"
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||
#include "vx-share/xdr_ptrace.h"
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||
#include "vx-share/xdr_ld.h"
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||
#include "vx-share/xdr_rdb.h"
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||
#include "vx-share/dbgRpcLib.h"
|
||
|
||
#include <symtab.h>
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||
|
||
extern void symbol_file_command ();
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||
extern int stop_soon_quietly; /* for wait_for_inferior */
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||
|
||
static int net_ptrace_clnt_call (); /* Forward decl */
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||
static enum clnt_stat net_clnt_call (); /* Forward decl */
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||
extern struct target_ops vx_ops, vx_run_ops; /* Forward declaration */
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||
|
||
/* Saved name of target host and called function for "info files".
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||
Both malloc'd. */
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||
|
||
static char *vx_host;
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||
static char *vx_running; /* Called function */
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||
|
||
/* Nonzero means target that is being debugged remotely has a floating
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||
point processor. */
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||
|
||
static int target_has_fp;
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||
|
||
/* Default error message when the network is forking up. */
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||
|
||
static const char rpcerr[] = "network target debugging: rpc error";
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||
|
||
CLIENT *pClient; /* client used in net debugging */
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static int ptraceSock = RPC_ANYSOCK;
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enum clnt_stat net_clnt_call();
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static void parse_args ();
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||
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static struct timeval rpcTimeout = { 10, 0 };
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static char *skip_white_space ();
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static char *find_white_space ();
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|
||
/* Tell the VxWorks target system to download a file.
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The load addresses of the text, data, and bss segments are
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stored in *pTextAddr, *pDataAddr, and *pBssAddr (respectively).
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Returns 0 for success, -1 for failure. */
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static int
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net_load (filename, pTextAddr, pDataAddr, pBssAddr)
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char *filename;
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CORE_ADDR *pTextAddr;
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CORE_ADDR *pDataAddr;
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||
CORE_ADDR *pBssAddr;
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||
{
|
||
enum clnt_stat status;
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||
struct ldfile ldstruct;
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||
struct timeval load_timeout;
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||
|
||
memset ((char *) &ldstruct, '\0', sizeof (ldstruct));
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||
|
||
/* We invoke clnt_call () here directly, instead of through
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net_clnt_call (), because we need to set a large timeout value.
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||
The load on the target side can take quite a while, easily
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more than 10 seconds. The user can kill this call by typing
|
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CTRL-C if there really is a problem with the load.
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||
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Do not change the tv_sec value without checking -- select() imposes
|
||
a limit of 10**8 on it for no good reason that I can see... */
|
||
|
||
load_timeout.tv_sec = 99999999; /* A large number, effectively inf. */
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load_timeout.tv_usec = 0;
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||
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||
status = clnt_call (pClient, VX_LOAD, xdr_wrapstring, &filename, xdr_ldfile,
|
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&ldstruct, load_timeout);
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||
|
||
if (status == RPC_SUCCESS)
|
||
{
|
||
if (*ldstruct.name == 0) /* load failed on VxWorks side */
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||
return -1;
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*pTextAddr = ldstruct.txt_addr;
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*pDataAddr = ldstruct.data_addr;
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*pBssAddr = ldstruct.bss_addr;
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return 0;
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||
}
|
||
else
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||
return -1;
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||
}
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|
||
/* returns 0 if successful, errno if RPC failed or VxWorks complains. */
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|
||
static int
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net_break (addr, procnum)
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int addr;
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u_long procnum;
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{
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enum clnt_stat status;
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int break_status;
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Rptrace ptrace_in; /* XXX This is stupid. It doesn't need to be a ptrace
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structure. How about something smaller? */
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memset ((char *) &ptrace_in, '\0', sizeof (ptrace_in));
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break_status = 0;
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ptrace_in.addr = addr;
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ptrace_in.pid = inferior_pid;
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status = net_clnt_call (procnum, xdr_rptrace, &ptrace_in, xdr_int,
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&break_status);
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|
||
if (status != RPC_SUCCESS)
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return errno;
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||
|
||
if (break_status == -1)
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return ENOMEM;
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return break_status; /* probably (FIXME) zero */
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}
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/* returns 0 if successful, errno otherwise */
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static int
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vx_insert_breakpoint (addr)
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int addr;
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{
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return net_break (addr, VX_BREAK_ADD);
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}
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/* returns 0 if successful, errno otherwise */
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static int
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vx_remove_breakpoint (addr)
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int addr;
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||
{
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return net_break (addr, VX_BREAK_DELETE);
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||
}
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|
||
/* Start an inferior process and sets inferior_pid to its pid.
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EXEC_FILE is the file to run.
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ALLARGS is a string containing the arguments to the program.
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ENV is the environment vector to pass.
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Returns process id. Errors reported with error().
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On VxWorks, we ignore exec_file. */
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static void
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vx_create_inferior (exec_file, args, env)
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char *exec_file;
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char *args;
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char **env;
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{
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enum clnt_stat status;
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arg_array passArgs;
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TASK_START taskStart;
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memset ((char *) &passArgs, '\0', sizeof (passArgs));
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memset ((char *) &taskStart, '\0', sizeof (taskStart));
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/* parse arguments, put them in passArgs */
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parse_args (args, &passArgs);
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if (passArgs.arg_array_len == 0)
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error ("You must specify a function name to run, and arguments if any");
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status = net_clnt_call (PROCESS_START, xdr_arg_array, &passArgs,
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xdr_TASK_START, &taskStart);
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if ((status != RPC_SUCCESS) || (taskStart.status == -1))
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error ("Can't create process on remote target machine");
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/* Save the name of the running function */
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vx_running = savestring (passArgs.arg_array_val[0],
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strlen (passArgs.arg_array_val[0]));
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push_target (&vx_run_ops);
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inferior_pid = taskStart.pid;
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||
/* We will get a trace trap after one instruction.
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Insert breakpoints and continue. */
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init_wait_for_inferior ();
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||
/* Set up the "saved terminal modes" of the inferior
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||
based on what modes we are starting it with. */
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||
target_terminal_init ();
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|
||
/* Install inferior's terminal modes. */
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||
target_terminal_inferior ();
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||
stop_soon_quietly = 1;
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wait_for_inferior (); /* Get the task spawn event */
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||
stop_soon_quietly = 0;
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/* insert_step_breakpoint (); FIXME, do we need this? */
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proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
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}
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/* Fill ARGSTRUCT in argc/argv form with the arguments from the
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argument string ARGSTRING. */
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||
static void
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parse_args (arg_string, arg_struct)
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||
register char *arg_string;
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arg_array *arg_struct;
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||
{
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||
register int arg_count = 0; /* number of arguments */
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||
register int arg_index = 0;
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||
register char *p0;
|
||
|
||
memset ((char *) arg_struct, '\0', sizeof (arg_array));
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||
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||
/* first count how many arguments there are */
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||
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||
p0 = arg_string;
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while (*p0 != '\0')
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||
{
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||
if (*(p0 = skip_white_space (p0)) == '\0')
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||
break;
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||
p0 = find_white_space (p0);
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arg_count++;
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||
}
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||
arg_struct->arg_array_len = arg_count;
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||
arg_struct->arg_array_val = (char **) xmalloc ((arg_count + 1)
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* sizeof (char *));
|
||
|
||
/* now copy argument strings into arg_struct. */
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||
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||
while (*(arg_string = skip_white_space (arg_string)))
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{
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p0 = find_white_space (arg_string);
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arg_struct->arg_array_val[arg_index++] = savestring (arg_string,
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p0 - arg_string);
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||
arg_string = p0;
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||
}
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||
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||
arg_struct->arg_array_val[arg_count] = NULL;
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||
}
|
||
|
||
/* Advance a string pointer across whitespace and return a pointer
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to the first non-white character. */
|
||
|
||
static char *
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||
skip_white_space (p)
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||
register char *p;
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||
{
|
||
while (*p == ' ' || *p == '\t')
|
||
p++;
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||
return p;
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||
}
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||
|
||
/* Search for the first unquoted whitespace character in a string.
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||
Returns a pointer to the character, or to the null terminator
|
||
if no whitespace is found. */
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||
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||
static char *
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find_white_space (p)
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register char *p;
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{
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||
register int c;
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||
|
||
while ((c = *p) != ' ' && c != '\t' && c)
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||
{
|
||
if (c == '\'' || c == '"')
|
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{
|
||
while (*++p != c && *p)
|
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{
|
||
if (*p == '\\')
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p++;
|
||
}
|
||
if (!*p)
|
||
break;
|
||
}
|
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p++;
|
||
}
|
||
return p;
|
||
}
|
||
|
||
/* Poll the VxWorks target system for an event related
|
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to the debugged task.
|
||
Returns -1 if remote wait failed, task status otherwise. */
|
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|
||
static int
|
||
net_wait (pEvent)
|
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RDB_EVENT *pEvent;
|
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{
|
||
int pid;
|
||
enum clnt_stat status;
|
||
|
||
memset ((char *) pEvent, '\0', sizeof (RDB_EVENT));
|
||
|
||
pid = inferior_pid;
|
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status = net_clnt_call (PROCESS_WAIT, xdr_int, &pid, xdr_RDB_EVENT, pEvent);
|
||
|
||
return (status == RPC_SUCCESS)? pEvent->status: -1;
|
||
}
|
||
|
||
/* Suspend the remote task.
|
||
Returns -1 if suspend fails on target system, 0 otherwise. */
|
||
|
||
static int
|
||
net_quit ()
|
||
{
|
||
int pid;
|
||
int quit_status;
|
||
enum clnt_stat status;
|
||
|
||
quit_status = 0;
|
||
|
||
/* don't let rdbTask suspend itself by passing a pid of 0 */
|
||
|
||
if ((pid = inferior_pid) == 0)
|
||
return -1;
|
||
|
||
status = net_clnt_call (VX_TASK_SUSPEND, xdr_int, &pid, xdr_int,
|
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&quit_status);
|
||
|
||
return (status == RPC_SUCCESS)? quit_status: -1;
|
||
}
|
||
|
||
/* Read a register or registers from the remote system. */
|
||
|
||
static void
|
||
vx_read_register (regno)
|
||
int regno;
|
||
{
|
||
int status;
|
||
Rptrace ptrace_in;
|
||
Ptrace_return ptrace_out;
|
||
C_bytes in_data;
|
||
C_bytes out_data;
|
||
extern char registers[];
|
||
|
||
memset ((char *) &ptrace_in, '\0', sizeof (ptrace_in));
|
||
memset ((char *) &ptrace_out, '\0', sizeof (ptrace_out));
|
||
|
||
/* FIXME, eventually only get the ones we need. */
|
||
registers_fetched ();
|
||
|
||
ptrace_in.pid = inferior_pid;
|
||
ptrace_out.info.more_data = (caddr_t) &out_data;
|
||
out_data.len = VX_NUM_REGS * REGISTER_RAW_SIZE (0);
|
||
out_data.bytes = (caddr_t) registers;
|
||
|
||
status = net_ptrace_clnt_call (PTRACE_GETREGS, &ptrace_in, &ptrace_out);
|
||
if (status)
|
||
error (rpcerr);
|
||
if (ptrace_out.status == -1)
|
||
{
|
||
errno = ptrace_out.errno;
|
||
perror_with_name ("net_ptrace_clnt_call(PTRACE_GETREGS)");
|
||
}
|
||
|
||
#ifdef VX_SIZE_FPREGS
|
||
/* If the target has floating point registers, fetch them.
|
||
Otherwise, zero the floating point register values in
|
||
registers[] for good measure, even though we might not
|
||
need to. */
|
||
|
||
if (target_has_fp)
|
||
{
|
||
ptrace_in.pid = inferior_pid;
|
||
ptrace_out.info.more_data = (caddr_t) &out_data;
|
||
out_data.len = VX_SIZE_FPREGS;
|
||
out_data.bytes = (caddr_t) ®isters[REGISTER_BYTE (FP0_REGNUM)];
|
||
|
||
status = net_ptrace_clnt_call (PTRACE_GETFPREGS, &ptrace_in, &ptrace_out);
|
||
if (status)
|
||
error (rpcerr);
|
||
if (ptrace_out.status == -1)
|
||
{
|
||
errno = ptrace_out.errno;
|
||
perror_with_name ("net_ptrace_clnt_call(PTRACE_GETFPREGS)");
|
||
}
|
||
}
|
||
else
|
||
{
|
||
memset (®isters[REGISTER_BYTE (FP0_REGNUM)], '\0', VX_SIZE_FPREGS);
|
||
}
|
||
#endif /* VX_SIZE_FPREGS */
|
||
}
|
||
|
||
/* Prepare to store registers. Since we will store all of them,
|
||
read out their current values now. */
|
||
|
||
static void
|
||
vx_prepare_to_store ()
|
||
{
|
||
/* Fetch all registers, if any of them are not yet fetched. */
|
||
read_register_bytes (0, NULL, REGISTER_BYTES);
|
||
}
|
||
|
||
|
||
/* Store our register values back into the inferior.
|
||
If REGNO is -1, do this for all registers.
|
||
Otherwise, REGNO specifies which register (so we can save time). */
|
||
/* FIXME, look at REGNO to save time here */
|
||
|
||
static void
|
||
vx_write_register (regno)
|
||
int regno;
|
||
{
|
||
C_bytes in_data;
|
||
C_bytes out_data;
|
||
extern char registers[];
|
||
int status;
|
||
Rptrace ptrace_in;
|
||
Ptrace_return ptrace_out;
|
||
|
||
memset ((char *) &ptrace_in, '\0', sizeof (ptrace_in));
|
||
memset ((char *) &ptrace_out, '\0', sizeof (ptrace_out));
|
||
|
||
ptrace_in.pid = inferior_pid;
|
||
ptrace_in.info.ttype = DATA;
|
||
ptrace_in.info.more_data = (caddr_t) &in_data;
|
||
|
||
in_data.bytes = registers;
|
||
|
||
in_data.len = VX_NUM_REGS * REGISTER_SIZE;
|
||
|
||
/* XXX change second param to be a proc number */
|
||
status = net_ptrace_clnt_call (PTRACE_SETREGS, &ptrace_in, &ptrace_out);
|
||
if (status)
|
||
error (rpcerr);
|
||
if (ptrace_out.status == -1)
|
||
{
|
||
errno = ptrace_out.errno;
|
||
perror_with_name ("net_ptrace_clnt_call(PTRACE_SETREGS)");
|
||
}
|
||
|
||
#ifdef VX_SIZE_FPREGS
|
||
/* Store floating point registers if the target has them. */
|
||
|
||
if (target_has_fp)
|
||
{
|
||
ptrace_in.pid = inferior_pid;
|
||
ptrace_in.info.ttype = DATA;
|
||
ptrace_in.info.more_data = (caddr_t) &in_data;
|
||
|
||
|
||
in_data.bytes = ®isters[REGISTER_BYTE (FP0_REGNUM)];
|
||
in_data.len = VX_SIZE_FPREGS;
|
||
|
||
status = net_ptrace_clnt_call (PTRACE_SETFPREGS, &ptrace_in, &ptrace_out);
|
||
if (status)
|
||
error (rpcerr);
|
||
if (ptrace_out.status == -1)
|
||
{
|
||
errno = ptrace_out.errno;
|
||
perror_with_name ("net_ptrace_clnt_call(PTRACE_SETFPREGS)");
|
||
}
|
||
}
|
||
#endif /* VX_SIZE_FPREGS */
|
||
}
|
||
|
||
/* Copy LEN bytes to or from remote inferior's memory starting at MEMADDR
|
||
to debugger memory starting at MYADDR. WRITE is true if writing to the
|
||
inferior.
|
||
Result is the number of bytes written or read (zero if error). The
|
||
protocol allows us to return a negative count, indicating that we can't
|
||
handle the current address but can handle one N bytes further, but
|
||
vxworks doesn't give us that information. */
|
||
|
||
static int
|
||
vx_xfer_memory (memaddr, myaddr, len, write, target)
|
||
CORE_ADDR memaddr;
|
||
char *myaddr;
|
||
int len;
|
||
int write;
|
||
struct target_ops *target; /* ignored */
|
||
{
|
||
int status;
|
||
Rptrace ptrace_in;
|
||
Ptrace_return ptrace_out;
|
||
C_bytes data;
|
||
|
||
memset ((char *) &ptrace_in, '\0', sizeof (ptrace_in));
|
||
memset ((char *) &ptrace_out, '\0', sizeof (ptrace_out));
|
||
|
||
ptrace_in.pid = inferior_pid; /* XXX pid unnecessary for READDATA */
|
||
ptrace_in.addr = (int) memaddr; /* Where from */
|
||
ptrace_in.data = len; /* How many bytes */
|
||
|
||
if (write)
|
||
{
|
||
ptrace_in.info.ttype = DATA;
|
||
ptrace_in.info.more_data = (caddr_t) &data;
|
||
|
||
data.bytes = (caddr_t) myaddr; /* Where from */
|
||
data.len = len; /* How many bytes (again, for XDR) */
|
||
|
||
/* XXX change second param to be a proc number */
|
||
status = net_ptrace_clnt_call (PTRACE_WRITEDATA, &ptrace_in, &ptrace_out);
|
||
}
|
||
else
|
||
{
|
||
ptrace_out.info.more_data = (caddr_t) &data;
|
||
data.bytes = myaddr; /* Where to */
|
||
data.len = len; /* How many (again, for XDR) */
|
||
|
||
/* XXX change second param to be a proc number */
|
||
status = net_ptrace_clnt_call (PTRACE_READDATA, &ptrace_in, &ptrace_out);
|
||
}
|
||
|
||
if (status)
|
||
error (rpcerr);
|
||
if (ptrace_out.status == -1)
|
||
{
|
||
return 0; /* No bytes moved */
|
||
}
|
||
return len; /* Moved *all* the bytes */
|
||
}
|
||
|
||
static void
|
||
vx_files_info ()
|
||
{
|
||
printf_unfiltered ("\tAttached to host `%s'", vx_host);
|
||
printf_unfiltered (", which has %sfloating point", target_has_fp? "": "no ");
|
||
printf_unfiltered (".\n");
|
||
}
|
||
|
||
static void
|
||
vx_run_files_info ()
|
||
{
|
||
printf_unfiltered ("\tRunning %s VxWorks process %s",
|
||
vx_running ? "child" : "attached",
|
||
local_hex_string (inferior_pid));
|
||
if (vx_running)
|
||
printf_unfiltered (", function `%s'", vx_running);
|
||
printf_unfiltered(".\n");
|
||
}
|
||
|
||
static void
|
||
vx_resume (pid, step, siggnal)
|
||
int pid;
|
||
int step;
|
||
enum target_signal siggnal;
|
||
{
|
||
int status;
|
||
Rptrace ptrace_in;
|
||
Ptrace_return ptrace_out;
|
||
|
||
if (pid == -1)
|
||
pid = inferior_pid;
|
||
|
||
if (siggnal != 0 && siggnal != stop_signal)
|
||
error ("Cannot send signals to VxWorks processes");
|
||
|
||
memset ((char *) &ptrace_in, '\0', sizeof (ptrace_in));
|
||
memset ((char *) &ptrace_out, '\0', sizeof (ptrace_out));
|
||
|
||
ptrace_in.pid = pid;
|
||
ptrace_in.addr = 1; /* Target side insists on this, or it panics. */
|
||
|
||
/* XXX change second param to be a proc number */
|
||
status = net_ptrace_clnt_call (step? PTRACE_SINGLESTEP: PTRACE_CONT,
|
||
&ptrace_in, &ptrace_out);
|
||
if (status)
|
||
error (rpcerr);
|
||
if (ptrace_out.status == -1)
|
||
{
|
||
errno = ptrace_out.errno;
|
||
perror_with_name ("Resuming remote process");
|
||
}
|
||
}
|
||
|
||
static void
|
||
vx_mourn_inferior ()
|
||
{
|
||
pop_target (); /* Pop back to no-child state */
|
||
generic_mourn_inferior ();
|
||
}
|
||
|
||
|
||
/* This function allows the addition of incrementally linked object files. */
|
||
|
||
static void
|
||
vx_load_command (arg_string, from_tty)
|
||
char* arg_string;
|
||
int from_tty;
|
||
{
|
||
CORE_ADDR text_addr;
|
||
CORE_ADDR data_addr;
|
||
CORE_ADDR bss_addr;
|
||
|
||
if (arg_string == 0)
|
||
error ("The load command takes a file name");
|
||
|
||
arg_string = tilde_expand (arg_string);
|
||
make_cleanup (free, arg_string);
|
||
|
||
dont_repeat ();
|
||
|
||
QUIT;
|
||
immediate_quit++;
|
||
if (net_load (arg_string, &text_addr, &data_addr, &bss_addr) == -1)
|
||
error ("Load failed on target machine");
|
||
immediate_quit--;
|
||
|
||
/* FIXME, for now we ignore data_addr and bss_addr. */
|
||
symbol_file_add (arg_string, from_tty, text_addr, 0, 0, 0);
|
||
|
||
/* Getting new symbols may change our opinion about what is
|
||
frameless. */
|
||
reinit_frame_cache ();
|
||
}
|
||
|
||
#ifdef FIXME /* Not ready for prime time */
|
||
/* Single step the target program at the source or machine level.
|
||
Takes an error exit if rpc fails.
|
||
Returns -1 if remote single-step operation fails, else 0. */
|
||
|
||
static int
|
||
net_step ()
|
||
{
|
||
enum clnt_stat status;
|
||
int step_status;
|
||
SOURCE_STEP source_step;
|
||
|
||
source_step.taskId = inferior_pid;
|
||
|
||
if (step_range_end)
|
||
{
|
||
source_step.startAddr = step_range_start;
|
||
source_step.endAddr = step_range_end;
|
||
}
|
||
else
|
||
{
|
||
source_step.startAddr = 0;
|
||
source_step.endAddr = 0;
|
||
}
|
||
|
||
status = net_clnt_call (VX_SOURCE_STEP, xdr_SOURCE_STEP, &source_step,
|
||
xdr_int, &step_status);
|
||
|
||
if (status == RPC_SUCCESS)
|
||
return step_status;
|
||
else
|
||
error (rpcerr);
|
||
}
|
||
#endif
|
||
|
||
/* Emulate ptrace using RPC calls to the VxWorks target system.
|
||
Returns nonzero (-1) if RPC status to VxWorks is bad, 0 otherwise. */
|
||
|
||
static int
|
||
net_ptrace_clnt_call (request, pPtraceIn, pPtraceOut)
|
||
enum ptracereq request;
|
||
Rptrace *pPtraceIn;
|
||
Ptrace_return *pPtraceOut;
|
||
{
|
||
enum clnt_stat status;
|
||
|
||
status = net_clnt_call (request, xdr_rptrace, pPtraceIn, xdr_ptrace_return,
|
||
pPtraceOut);
|
||
|
||
if (status != RPC_SUCCESS)
|
||
return -1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Query the target for the name of the file from which VxWorks was
|
||
booted. pBootFile is the address of a pointer to the buffer to
|
||
receive the file name; if the pointer pointed to by pBootFile is
|
||
NULL, memory for the buffer will be allocated by XDR.
|
||
Returns -1 if rpc failed, 0 otherwise. */
|
||
|
||
static int
|
||
net_get_boot_file (pBootFile)
|
||
char **pBootFile;
|
||
{
|
||
enum clnt_stat status;
|
||
|
||
status = net_clnt_call (VX_BOOT_FILE_INQ, xdr_void, (char *) 0,
|
||
xdr_wrapstring, pBootFile);
|
||
return (status == RPC_SUCCESS) ? 0 : -1;
|
||
}
|
||
|
||
/* Fetch a list of loaded object modules from the VxWorks target.
|
||
Returns -1 if rpc failed, 0 otherwise
|
||
There's no way to check if the returned loadTable is correct.
|
||
VxWorks doesn't check it. */
|
||
|
||
static int
|
||
net_get_symbols (pLoadTable)
|
||
ldtabl *pLoadTable; /* return pointer to ldtabl here */
|
||
{
|
||
enum clnt_stat status;
|
||
|
||
memset ((char *) pLoadTable, '\0', sizeof (struct ldtabl));
|
||
|
||
status = net_clnt_call (VX_STATE_INQ, xdr_void, 0, xdr_ldtabl, pLoadTable);
|
||
return (status == RPC_SUCCESS) ? 0 : -1;
|
||
}
|
||
|
||
/* Look up a symbol in the VxWorks target's symbol table.
|
||
Returns status of symbol read on target side (0=success, -1=fail)
|
||
Returns -1 and complain()s if rpc fails. */
|
||
|
||
struct complaint cant_contact_target =
|
||
{"Lost contact with VxWorks target", 0, 0};
|
||
|
||
static int
|
||
vx_lookup_symbol (name, pAddr)
|
||
char *name; /* symbol name */
|
||
CORE_ADDR *pAddr;
|
||
{
|
||
enum clnt_stat status;
|
||
SYMBOL_ADDR symbolAddr;
|
||
|
||
*pAddr = 0;
|
||
memset ((char *) &symbolAddr, '\0', sizeof (symbolAddr));
|
||
|
||
status = net_clnt_call (VX_SYMBOL_INQ, xdr_wrapstring, &name,
|
||
xdr_SYMBOL_ADDR, &symbolAddr);
|
||
if (status != RPC_SUCCESS) {
|
||
complain (&cant_contact_target);
|
||
return -1;
|
||
}
|
||
|
||
*pAddr = symbolAddr.addr;
|
||
return symbolAddr.status;
|
||
}
|
||
|
||
/* Check to see if the VxWorks target has a floating point coprocessor.
|
||
Returns 1 if target has floating point processor, 0 otherwise.
|
||
Calls error() if rpc fails. */
|
||
|
||
static int
|
||
net_check_for_fp ()
|
||
{
|
||
enum clnt_stat status;
|
||
bool_t fp = 0; /* true if fp processor is present on target board */
|
||
|
||
status = net_clnt_call (VX_FP_INQUIRE, xdr_void, 0, xdr_bool, &fp);
|
||
if (status != RPC_SUCCESS)
|
||
error (rpcerr);
|
||
|
||
return (int) fp;
|
||
}
|
||
|
||
/* Establish an RPC connection with the VxWorks target system.
|
||
Calls error () if unable to establish connection. */
|
||
|
||
static void
|
||
net_connect (host)
|
||
char *host;
|
||
{
|
||
struct sockaddr_in destAddr;
|
||
struct hostent *destHost;
|
||
unsigned long addr;
|
||
|
||
/* Get the internet address for the given host. Allow a numeric
|
||
IP address or a hostname. */
|
||
|
||
addr = inet_addr (host);
|
||
if (addr == -1)
|
||
{
|
||
destHost = (struct hostent *) gethostbyname (host);
|
||
if (destHost == NULL)
|
||
error ("Invalid hostname. Couldn't find remote host address.");
|
||
addr = * (unsigned long *) destHost->h_addr;
|
||
}
|
||
|
||
memset (&destAddr, '\0', sizeof (destAddr));
|
||
|
||
destAddr.sin_addr.s_addr = addr;
|
||
destAddr.sin_family = AF_INET;
|
||
destAddr.sin_port = 0; /* set to actual port that remote
|
||
ptrace is listening on. */
|
||
|
||
/* Create a tcp client transport on which to issue
|
||
calls to the remote ptrace server. */
|
||
|
||
ptraceSock = RPC_ANYSOCK;
|
||
pClient = clnttcp_create (&destAddr, RDBPROG, RDBVERS, &ptraceSock, 0, 0);
|
||
/* FIXME, here is where we deal with different version numbers of the proto */
|
||
|
||
if (pClient == NULL)
|
||
{
|
||
clnt_pcreateerror ("\tnet_connect");
|
||
error ("Couldn't connect to remote target.");
|
||
}
|
||
}
|
||
|
||
/* Sleep for the specified number of milliseconds
|
||
* (assumed to be less than 1000).
|
||
* If select () is interrupted, returns immediately;
|
||
* takes an error exit if select () fails for some other reason.
|
||
*/
|
||
|
||
static void
|
||
sleep_ms (ms)
|
||
long ms;
|
||
{
|
||
struct timeval select_timeout;
|
||
int status;
|
||
|
||
select_timeout.tv_sec = 0;
|
||
select_timeout.tv_usec = ms * 1000;
|
||
|
||
status = select (0, (fd_set *) 0, (fd_set *) 0, (fd_set *) 0, &select_timeout);
|
||
|
||
if (status < 0 && errno != EINTR)
|
||
perror_with_name ("select");
|
||
}
|
||
|
||
/* Wait for control to return from inferior to debugger.
|
||
If inferior gets a signal, we may decide to start it up again
|
||
instead of returning. That is why there is a loop in this function.
|
||
When this function actually returns it means the inferior
|
||
should be left stopped and GDB should read more commands. */
|
||
|
||
/* For network debugging with VxWorks.
|
||
* VxWorks knows when tasks hit breakpoints, receive signals, exit, etc,
|
||
* so vx_wait() receives this information directly from
|
||
* VxWorks instead of trying to figure out what happenned via a wait() call.
|
||
*/
|
||
|
||
static int
|
||
vx_wait (pid_to_wait_for, status)
|
||
int pid_to_wait_for;
|
||
struct target_waitstatus *status;
|
||
{
|
||
register int pid;
|
||
RDB_EVENT rdbEvent;
|
||
int quit_failed;
|
||
|
||
do
|
||
{
|
||
/* If CTRL-C is hit during this loop,
|
||
suspend the inferior process. */
|
||
|
||
quit_failed = 0;
|
||
if (quit_flag)
|
||
{
|
||
quit_failed = (net_quit () == -1);
|
||
quit_flag = 0;
|
||
}
|
||
|
||
/* If a net_quit () or net_wait () call has failed,
|
||
allow the user to break the connection with the target.
|
||
We can't simply error () out of this loop, since the
|
||
data structures representing the state of the inferior
|
||
are in an inconsistent state. */
|
||
|
||
if (quit_failed || net_wait (&rdbEvent) == -1)
|
||
{
|
||
terminal_ours ();
|
||
if (query ("Can't %s. Disconnect from target system? ",
|
||
(quit_failed) ? "suspend remote task"
|
||
: "get status of remote task"))
|
||
{
|
||
target_mourn_inferior();
|
||
error ("Use the \"target\" command to reconnect.");
|
||
}
|
||
else
|
||
{
|
||
terminal_inferior ();
|
||
continue;
|
||
}
|
||
}
|
||
|
||
pid = rdbEvent.taskId;
|
||
if (pid == 0)
|
||
{
|
||
sleep_ms (200); /* FIXME Don't kill the network too badly */
|
||
}
|
||
else if (pid != inferior_pid)
|
||
fatal ("Bad pid for debugged task: %s\n",
|
||
local_hex_string((unsigned long) pid));
|
||
} while (pid == 0);
|
||
|
||
/* The mostly likely kind. */
|
||
status->kind = TARGET_WAITKIND_STOPPED;
|
||
|
||
switch (rdbEvent.eventType)
|
||
{
|
||
case EVENT_EXIT:
|
||
status->kind = TARGET_WAITKIND_EXITED;
|
||
/* FIXME is it possible to distinguish between a
|
||
normal vs abnormal exit in VxWorks? */
|
||
status->value.integer = 0;
|
||
break;
|
||
|
||
case EVENT_START:
|
||
/* Task was just started. */
|
||
status->value.sig = TARGET_SIGNAL_TRAP;
|
||
break;
|
||
|
||
case EVENT_STOP:
|
||
status->value.sig = TARGET_SIGNAL_TRAP;
|
||
/* XXX was it stopped by a signal? act accordingly */
|
||
break;
|
||
|
||
case EVENT_BREAK: /* Breakpoint was hit. */
|
||
status->value.sig = TARGET_SIGNAL_TRAP;
|
||
break;
|
||
|
||
case EVENT_SUSPEND: /* Task was suspended, probably by ^C. */
|
||
status->value.sig = TARGET_SIGNAL_INT;
|
||
break;
|
||
|
||
case EVENT_BUS_ERR: /* Task made evil nasty reference. */
|
||
status->value.sig = TARGET_SIGNAL_BUS;
|
||
break;
|
||
|
||
case EVENT_ZERO_DIV: /* Division by zero */
|
||
status->value.sig = TARGET_SIGNAL_FPE;
|
||
break;
|
||
|
||
case EVENT_SIGNAL:
|
||
#ifdef I80960
|
||
status->value.sig = i960_fault_to_signal (rdbEvent.sigType);
|
||
#else
|
||
/* Back in the old days, before enum target_signal, this code used
|
||
to add NSIG to the signal number and claim that PRINT_RANDOM_SIGNAL
|
||
would take care of it. But PRINT_RANDOM_SIGNAL has never been
|
||
defined except on the i960, so I don't really know what we are
|
||
supposed to do on other architectures. */
|
||
status->value.sig = TARGET_SIGNAL_UNKNOWN;
|
||
#endif
|
||
break;
|
||
} /* switch */
|
||
return pid;
|
||
}
|
||
|
||
static int
|
||
symbol_stub (arg)
|
||
char *arg;
|
||
{
|
||
symbol_file_command (arg, 0);
|
||
return 1;
|
||
}
|
||
|
||
static int
|
||
add_symbol_stub (arg)
|
||
char *arg;
|
||
{
|
||
struct ldfile *pLoadFile = (struct ldfile *)arg;
|
||
|
||
printf_unfiltered("\t%s: ", pLoadFile->name);
|
||
symbol_file_add (pLoadFile->name, 0, pLoadFile->txt_addr, 0, 0, 0);
|
||
printf_unfiltered ("ok\n");
|
||
return 1;
|
||
}
|
||
/* Target command for VxWorks target systems.
|
||
|
||
Used in vxgdb. Takes the name of a remote target machine
|
||
running vxWorks and connects to it to initialize remote network
|
||
debugging. */
|
||
|
||
static void
|
||
vx_open (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
extern int close ();
|
||
char *bootFile;
|
||
extern char *source_path;
|
||
struct ldtabl loadTable;
|
||
struct ldfile *pLoadFile;
|
||
int i;
|
||
extern CLIENT *pClient;
|
||
int symbols_added = 0;
|
||
|
||
if (!args)
|
||
error_no_arg ("target machine name");
|
||
|
||
target_preopen (from_tty);
|
||
|
||
unpush_target (&vx_ops);
|
||
printf_unfiltered ("Attaching remote machine across net...\n");
|
||
gdb_flush (gdb_stdout);
|
||
|
||
/* Allow the user to kill the connect attempt by typing ^C.
|
||
Wait until the call to target_has_fp () completes before
|
||
disallowing an immediate quit, since even if net_connect ()
|
||
is successful, the remote debug server might be hung. */
|
||
|
||
immediate_quit++;
|
||
|
||
net_connect (args);
|
||
target_has_fp = net_check_for_fp ();
|
||
printf_filtered ("Connected to %s.\n", args);
|
||
|
||
immediate_quit--;
|
||
|
||
push_target (&vx_ops);
|
||
|
||
/* Save a copy of the target host's name. */
|
||
vx_host = savestring (args, strlen (args));
|
||
|
||
/* Find out the name of the file from which the target was booted
|
||
and load its symbol table. */
|
||
|
||
printf_filtered ("Looking in Unix path for all loaded modules:\n");
|
||
bootFile = NULL;
|
||
if (!net_get_boot_file (&bootFile))
|
||
{
|
||
if (*bootFile) {
|
||
printf_filtered ("\t%s: ", bootFile);
|
||
if (catch_errors
|
||
(symbol_stub, bootFile,
|
||
"Error while reading symbols from boot file:\n", RETURN_MASK_ALL))
|
||
puts_filtered ("ok\n");
|
||
} else if (from_tty)
|
||
printf_unfiltered ("VxWorks kernel symbols not loaded.\n");
|
||
}
|
||
else
|
||
error ("Can't retrieve boot file name from target machine.");
|
||
|
||
clnt_freeres (pClient, xdr_wrapstring, &bootFile);
|
||
|
||
if (net_get_symbols (&loadTable) != 0)
|
||
error ("Can't read loaded modules from target machine");
|
||
|
||
i = 0-1;
|
||
while (++i < loadTable.tbl_size)
|
||
{
|
||
QUIT; /* FIXME, avoids clnt_freeres below: mem leak */
|
||
pLoadFile = &loadTable.tbl_ent [i];
|
||
#ifdef WRS_ORIG
|
||
{
|
||
register int desc;
|
||
struct cleanup *old_chain;
|
||
char *fullname = NULL;
|
||
|
||
desc = openp (source_path, 0, pLoadFile->name, O_RDONLY, 0, &fullname);
|
||
if (desc < 0)
|
||
perror_with_name (pLoadFile->name);
|
||
old_chain = make_cleanup (close, desc);
|
||
add_file_at_addr (fullname, desc, pLoadFile->txt_addr, pLoadFile->data_addr,
|
||
pLoadFile->bss_addr);
|
||
do_cleanups (old_chain);
|
||
}
|
||
#else
|
||
/* Botches, FIXME:
|
||
(1) Searches the PATH, not the source path.
|
||
(2) data and bss are assumed to be at the usual offsets from text. */
|
||
if (catch_errors (add_symbol_stub, (char *)pLoadFile, (char *)0,
|
||
RETURN_MASK_ALL))
|
||
symbols_added = 1;
|
||
#endif
|
||
}
|
||
printf_filtered ("Done.\n");
|
||
|
||
clnt_freeres (pClient, xdr_ldtabl, &loadTable);
|
||
|
||
/* Getting new symbols may change our opinion about what is
|
||
frameless. */
|
||
if (symbols_added)
|
||
reinit_frame_cache ();
|
||
}
|
||
|
||
/* Takes a task started up outside of gdb and ``attaches'' to it.
|
||
This stops it cold in its tracks and allows us to start tracing it. */
|
||
|
||
static void
|
||
vx_attach (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
unsigned long pid;
|
||
char *cptr = 0;
|
||
Rptrace ptrace_in;
|
||
Ptrace_return ptrace_out;
|
||
int status;
|
||
|
||
if (!args)
|
||
error_no_arg ("process-id to attach");
|
||
|
||
pid = strtoul (args, &cptr, 0);
|
||
if ((cptr == args) || (*cptr != '\0'))
|
||
error ("Invalid process-id -- give a single number in decimal or 0xhex");
|
||
|
||
if (from_tty)
|
||
printf_unfiltered ("Attaching pid %s.\n",
|
||
local_hex_string((unsigned long) pid));
|
||
|
||
memset ((char *)&ptrace_in, '\0', sizeof (ptrace_in));
|
||
memset ((char *)&ptrace_out, '\0', sizeof (ptrace_out));
|
||
ptrace_in.pid = pid;
|
||
|
||
status = net_ptrace_clnt_call (PTRACE_ATTACH, &ptrace_in, &ptrace_out);
|
||
if (status == -1)
|
||
error (rpcerr);
|
||
if (ptrace_out.status == -1)
|
||
{
|
||
errno = ptrace_out.errno;
|
||
perror_with_name ("Attaching remote process");
|
||
}
|
||
|
||
/* It worked... */
|
||
push_target (&vx_run_ops);
|
||
/* The unsigned long pid will get turned into a signed int here,
|
||
but it doesn't seem to matter. inferior_pid must be signed
|
||
in order for other parts of GDB to work correctly. */
|
||
inferior_pid = pid;
|
||
vx_running = 0;
|
||
}
|
||
|
||
|
||
/* 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
|
||
vx_detach (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
Rptrace ptrace_in;
|
||
Ptrace_return ptrace_out;
|
||
int signal = 0;
|
||
int status;
|
||
|
||
if (args)
|
||
error ("Argument given to VxWorks \"detach\".");
|
||
|
||
if (from_tty)
|
||
printf_unfiltered ("Detaching pid %s.\n",
|
||
local_hex_string((unsigned long) inferior_pid));
|
||
|
||
if (args) /* FIXME, should be possible to leave suspended */
|
||
signal = atoi (args);
|
||
|
||
memset ((char *)&ptrace_in, '\0', sizeof (ptrace_in));
|
||
memset ((char *)&ptrace_out, '\0', sizeof (ptrace_out));
|
||
ptrace_in.pid = inferior_pid;
|
||
|
||
status = net_ptrace_clnt_call (PTRACE_DETACH, &ptrace_in, &ptrace_out);
|
||
if (status == -1)
|
||
error (rpcerr);
|
||
if (ptrace_out.status == -1)
|
||
{
|
||
errno = ptrace_out.errno;
|
||
perror_with_name ("Detaching VxWorks process");
|
||
}
|
||
|
||
inferior_pid = 0;
|
||
pop_target (); /* go back to non-executing VxWorks connection */
|
||
}
|
||
|
||
/* vx_kill -- takes a running task and wipes it out. */
|
||
|
||
static void
|
||
vx_kill ()
|
||
{
|
||
Rptrace ptrace_in;
|
||
Ptrace_return ptrace_out;
|
||
int status;
|
||
|
||
printf_unfiltered ("Killing pid %s.\n", local_hex_string((unsigned long) inferior_pid));
|
||
|
||
memset ((char *)&ptrace_in, '\0', sizeof (ptrace_in));
|
||
memset ((char *)&ptrace_out, '\0', sizeof (ptrace_out));
|
||
ptrace_in.pid = inferior_pid;
|
||
|
||
status = net_ptrace_clnt_call (PTRACE_KILL, &ptrace_in, &ptrace_out);
|
||
if (status == -1)
|
||
warning (rpcerr);
|
||
else if (ptrace_out.status == -1)
|
||
{
|
||
errno = ptrace_out.errno;
|
||
perror_with_name ("Killing VxWorks process");
|
||
}
|
||
|
||
/* If it gives good status, the process is *gone*, no events remain.
|
||
If the kill failed, assume the process is gone anyhow. */
|
||
inferior_pid = 0;
|
||
pop_target (); /* go back to non-executing VxWorks connection */
|
||
}
|
||
|
||
/* Clean up from the VxWorks process target as it goes away. */
|
||
|
||
static void
|
||
vx_proc_close (quitting)
|
||
int quitting;
|
||
{
|
||
inferior_pid = 0; /* No longer have a process. */
|
||
if (vx_running)
|
||
free (vx_running);
|
||
vx_running = 0;
|
||
}
|
||
|
||
/* Make an RPC call to the VxWorks target.
|
||
Returns RPC status. */
|
||
|
||
static enum clnt_stat
|
||
net_clnt_call (procNum, inProc, in, outProc, out)
|
||
enum ptracereq procNum;
|
||
xdrproc_t inProc;
|
||
char *in;
|
||
xdrproc_t outProc;
|
||
char *out;
|
||
{
|
||
enum clnt_stat status;
|
||
|
||
status = clnt_call (pClient, procNum, inProc, in, outProc, out, rpcTimeout);
|
||
|
||
if (status != RPC_SUCCESS)
|
||
clnt_perrno (status);
|
||
|
||
return status;
|
||
}
|
||
|
||
/* Clean up before losing control. */
|
||
|
||
static void
|
||
vx_close (quitting)
|
||
int quitting;
|
||
{
|
||
if (pClient)
|
||
clnt_destroy (pClient); /* The net connection */
|
||
pClient = 0;
|
||
|
||
if (vx_host)
|
||
free (vx_host); /* The hostname */
|
||
vx_host = 0;
|
||
}
|
||
|
||
/* A vxprocess target should be started via "run" not "target". */
|
||
/*ARGSUSED*/
|
||
static void
|
||
vx_proc_open (name, from_tty)
|
||
char *name;
|
||
int from_tty;
|
||
{
|
||
error ("Use the \"run\" command to start a VxWorks process.");
|
||
}
|
||
|
||
/* Target ops structure for accessing memory and such over the net */
|
||
|
||
struct target_ops vx_ops = {
|
||
"vxworks", "VxWorks target memory via RPC over TCP/IP",
|
||
"Use VxWorks target memory. \n\
|
||
Specify the name of the machine to connect to.",
|
||
vx_open, vx_close, vx_attach, 0, /* vx_detach, */
|
||
0, 0, /* resume, wait */
|
||
0, 0, /* read_reg, write_reg */
|
||
0, /* prep_to_store, */
|
||
vx_xfer_memory, vx_files_info,
|
||
0, 0, /* insert_breakpoint, remove_breakpoint */
|
||
0, 0, 0, 0, 0, /* terminal stuff */
|
||
0, /* vx_kill, */
|
||
vx_load_command,
|
||
vx_lookup_symbol,
|
||
vx_create_inferior, 0, /* mourn_inferior */
|
||
0, /* can_run */
|
||
0, /* notice_signals */
|
||
core_stratum, 0, /* next */
|
||
1, 1, 0, 0, 0, /* all mem, mem, stack, regs, exec */
|
||
0, 0, /* Section pointers */
|
||
OPS_MAGIC, /* Always the last thing */
|
||
};
|
||
|
||
/* Target ops structure for accessing VxWorks child processes over the net */
|
||
|
||
struct target_ops vx_run_ops = {
|
||
"vxprocess", "VxWorks process",
|
||
"VxWorks process, started by the \"run\" command.",
|
||
vx_proc_open, vx_proc_close, 0, vx_detach, /* vx_attach */
|
||
vx_resume, vx_wait,
|
||
vx_read_register, vx_write_register,
|
||
vx_prepare_to_store,
|
||
vx_xfer_memory, vx_run_files_info,
|
||
vx_insert_breakpoint, vx_remove_breakpoint,
|
||
0, 0, 0, 0, 0, /* terminal stuff */
|
||
vx_kill,
|
||
vx_load_command,
|
||
vx_lookup_symbol,
|
||
0, vx_mourn_inferior,
|
||
0, /* can_run */
|
||
0, /* notice_signals */
|
||
process_stratum, 0, /* next */
|
||
0, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */
|
||
/* all_mem is off to avoid spurious msg in "i files" */
|
||
0, 0, /* Section pointers */
|
||
OPS_MAGIC, /* Always the last thing */
|
||
};
|
||
/* ==> Remember when reading at end of file, there are two "ops" structs here. */
|
||
|
||
void
|
||
_initialize_vx ()
|
||
{
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("vxworks-timeout", class_support, var_uinteger,
|
||
(char *) &rpcTimeout.tv_sec,
|
||
"Set seconds to wait for rpc calls to return.\n\
|
||
Set the number of seconds to wait for rpc calls to return.", &setlist),
|
||
&showlist);
|
||
|
||
add_target (&vx_ops);
|
||
add_target (&vx_run_ops);
|
||
}
|