/* Sequent Symmetry host interface, for GDB when running under Unix.
- Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1991, 1992, 1994 Free Software Foundation, Inc.
This file is part of GDB.
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. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* FIXME, some 387-specific items of use taken from i387-tdep.c -- ought to be
merged back in. */
#include "frame.h"
#include "inferior.h"
#include "symtab.h"
+#include "target.h"
+/* FIXME: What is the _INKERNEL define for? */
+#define _INKERNEL
#include <signal.h>
+#undef _INKERNEL
+#include <sys/wait.h>
#include <sys/param.h>
#include <sys/user.h>
+#include <sys/proc.h>
#include <sys/dir.h>
#include <sys/ioctl.h>
-#include <sys/stat.h>
+#include "gdb_stat.h"
+#ifdef _SEQUENT_
+#include <sys/ptrace.h>
+#else
+/* Dynix has only machine/ptrace.h, which is already included by sys/user.h */
+/* Dynix has no mptrace call */
+#define mptrace ptrace
+#endif
#include "gdbcore.h"
#include <fcntl.h>
#include <sgtty.h>
int regno;
{
struct pt_regset regs;
- int reg_tmp, i;
+ int i;
extern char registers[];
-
+
+ /* FIXME: Fetching the registers is a kludge to initialize all elements
+ in the fpu and fpa status. This works for normal debugging, but
+ might cause problems when calling functions in the inferior.
+ At least fpu_control and fpa_pcr (probably more) should be added
+ to the registers array to solve this properly. */
+ mptrace (XPT_RREGS, inferior_pid, (PTRACE_ARG3_TYPE) ®s, 0);
+
regs.pr_eax = *(int *)®isters[REGISTER_BYTE(0)];
regs.pr_ebx = *(int *)®isters[REGISTER_BYTE(5)];
regs.pr_ecx = *(int *)®isters[REGISTER_BYTE(2)];
regs.pr_fpa.fpa_regs[i] =
*(int *)®isters[REGISTER_BYTE(FP1_REGNUM+i)];
}
- PTRACE_WRITE_REGS (inferior_pid, (PTRACE_ARG3_TYPE) ®s);
+ memcpy (regs.pr_fpu.fpu_stack[0], ®isters[REGISTER_BYTE(ST0_REGNUM)], 10);
+ memcpy (regs.pr_fpu.fpu_stack[1], ®isters[REGISTER_BYTE(ST1_REGNUM)], 10);
+ memcpy (regs.pr_fpu.fpu_stack[2], ®isters[REGISTER_BYTE(ST2_REGNUM)], 10);
+ memcpy (regs.pr_fpu.fpu_stack[3], ®isters[REGISTER_BYTE(ST3_REGNUM)], 10);
+ memcpy (regs.pr_fpu.fpu_stack[4], ®isters[REGISTER_BYTE(ST4_REGNUM)], 10);
+ memcpy (regs.pr_fpu.fpu_stack[5], ®isters[REGISTER_BYTE(ST5_REGNUM)], 10);
+ memcpy (regs.pr_fpu.fpu_stack[6], ®isters[REGISTER_BYTE(ST6_REGNUM)], 10);
+ memcpy (regs.pr_fpu.fpu_stack[7], ®isters[REGISTER_BYTE(ST7_REGNUM)], 10);
+ mptrace (XPT_WREGS, inferior_pid, (PTRACE_ARG3_TYPE) ®s, 0);
}
void
registers_fetched ();
- PTRACE_READ_REGS (inferior_pid, (PTRACE_ARG3_TYPE) ®s);
+ mptrace (XPT_RREGS, inferior_pid, (PTRACE_ARG3_TYPE) ®s, 0);
*(int *)®isters[REGISTER_BYTE(EAX_REGNUM)] = regs.pr_eax;
*(int *)®isters[REGISTER_BYTE(EBX_REGNUM)] = regs.pr_ebx;
*(int *)®isters[REGISTER_BYTE(ECX_REGNUM)] = regs.pr_ecx;
int fpreg;
unsigned char *p;
- printf("80387:");
+ printf_unfiltered("80387:");
if (ep.pr_fpu.fpu_ip == 0) {
- printf(" not in use.\n");
+ printf_unfiltered(" not in use.\n");
return;
} else {
- printf("\n");
+ printf_unfiltered("\n");
}
if (ep.pr_fpu.fpu_status != 0) {
print_387_status_word (ep.pr_fpu.fpu_status);
}
print_387_control_word (ep.pr_fpu.fpu_control);
- printf ("last exception: ");
- printf ("opcode 0x%x; ", ep.pr_fpu.fpu_rsvd4);
- printf ("pc 0x%x:0x%x; ", ep.pr_fpu.fpu_cs, ep.pr_fpu.fpu_ip);
- printf ("operand 0x%x:0x%x\n", ep.pr_fpu.fpu_data_offset, ep.pr_fpu.fpu_op_sel);
+ printf_unfiltered ("last exception: ");
+ printf_unfiltered ("opcode 0x%x; ", ep.pr_fpu.fpu_rsvd4);
+ printf_unfiltered ("pc 0x%x:0x%x; ", ep.pr_fpu.fpu_cs, ep.pr_fpu.fpu_ip);
+ printf_unfiltered ("operand 0x%x:0x%x\n", ep.pr_fpu.fpu_data_offset, ep.pr_fpu.fpu_op_sel);
top = (ep.pr_fpu.fpu_status >> 11) & 7;
- printf ("regno tag msb lsb value\n");
+ printf_unfiltered ("regno tag msb lsb value\n");
for (fpreg = 7; fpreg >= 0; fpreg--)
{
double val;
- printf ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
+ printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
switch ((ep.pr_fpu.fpu_tag >> (fpreg * 2)) & 3)
{
- case 0: printf ("valid "); break;
- case 1: printf ("zero "); break;
- case 2: printf ("trap "); break;
- case 3: printf ("empty "); break;
+ case 0: printf_unfiltered ("valid "); break;
+ case 1: printf_unfiltered ("zero "); break;
+ case 2: printf_unfiltered ("trap "); break;
+ case 3: printf_unfiltered ("empty "); break;
}
for (i = 9; i >= 0; i--)
- printf ("%02x", ep.pr_fpu.fpu_stack[fpreg][i]);
+ printf_unfiltered ("%02x", ep.pr_fpu.fpu_stack[fpreg][i]);
- i387_to_double (ep.pr_fpu.fpu_stack[fpreg], (char *)&val);
- printf (" %g\n", val);
+ i387_to_double ((char *)ep.pr_fpu.fpu_stack[fpreg], (char *)&val);
+ printf_unfiltered (" %g\n", val);
}
if (ep.pr_fpu.fpu_rsvd1)
warning ("rsvd1 is 0x%x\n", ep.pr_fpu.fpu_rsvd1);
int pcr_tmp;
pcr_tmp = pcr & FPA_PCR_MODE;
- printf("\tMODE= %#x; RND= %#x ", pcr_tmp, pcr_tmp & 12);
+ printf_unfiltered("\tMODE= %#x; RND= %#x ", pcr_tmp, pcr_tmp & 12);
switch (pcr_tmp & 12) {
case 0:
- printf("RN (Nearest Value)");
+ printf_unfiltered("RN (Nearest Value)");
break;
case 1:
- printf("RZ (Zero)");
+ printf_unfiltered("RZ (Zero)");
break;
case 2:
- printf("RP (Positive Infinity)");
+ printf_unfiltered("RP (Positive Infinity)");
break;
case 3:
- printf("RM (Negative Infinity)");
+ printf_unfiltered("RM (Negative Infinity)");
break;
}
- printf("; IRND= %d ", pcr_tmp & 2);
+ printf_unfiltered("; IRND= %d ", pcr_tmp & 2);
if (0 == pcr_tmp & 2) {
- printf("(same as RND)\n");
+ printf_unfiltered("(same as RND)\n");
} else {
- printf("(toward zero)\n");
+ printf_unfiltered("(toward zero)\n");
}
pcr_tmp = pcr & FPA_PCR_EM;
- printf("\tEM= %#x", pcr_tmp);
- if (pcr_tmp & FPA_PCR_EM_DM) printf(" DM");
- if (pcr_tmp & FPA_PCR_EM_UOM) printf(" UOM");
- if (pcr_tmp & FPA_PCR_EM_PM) printf(" PM");
- if (pcr_tmp & FPA_PCR_EM_UM) printf(" UM");
- if (pcr_tmp & FPA_PCR_EM_OM) printf(" OM");
- if (pcr_tmp & FPA_PCR_EM_ZM) printf(" ZM");
- if (pcr_tmp & FPA_PCR_EM_IM) printf(" IM");
- printf("\n");
+ printf_unfiltered("\tEM= %#x", pcr_tmp);
+ if (pcr_tmp & FPA_PCR_EM_DM) printf_unfiltered(" DM");
+ if (pcr_tmp & FPA_PCR_EM_UOM) printf_unfiltered(" UOM");
+ if (pcr_tmp & FPA_PCR_EM_PM) printf_unfiltered(" PM");
+ if (pcr_tmp & FPA_PCR_EM_UM) printf_unfiltered(" UM");
+ if (pcr_tmp & FPA_PCR_EM_OM) printf_unfiltered(" OM");
+ if (pcr_tmp & FPA_PCR_EM_ZM) printf_unfiltered(" ZM");
+ if (pcr_tmp & FPA_PCR_EM_IM) printf_unfiltered(" IM");
+ printf_unfiltered("\n");
pcr_tmp = FPA_PCR_CC;
- printf("\tCC= %#x", pcr_tmp);
- if (pcr_tmp & FPA_PCR_20MHZ) printf(" 20MHZ");
- if (pcr_tmp & FPA_PCR_CC_Z) printf(" Z");
- if (pcr_tmp & FPA_PCR_CC_C2) printf(" C2");
- if (pcr_tmp & FPA_PCR_CC_C1) printf(" C1");
- switch (pcr_tmp) {
- case FPA_PCR_CC_Z:
- printf(" (Equal)");
+ printf_unfiltered("\tCC= %#x", pcr_tmp);
+ if (pcr_tmp & FPA_PCR_20MHZ) printf_unfiltered(" 20MHZ");
+ if (pcr_tmp & FPA_PCR_CC_Z) printf_unfiltered(" Z");
+ if (pcr_tmp & FPA_PCR_CC_C2) printf_unfiltered(" C2");
+
+ /* Dynix defines FPA_PCR_CC_C0 to 0x100 and ptx defines
+ FPA_PCR_CC_C1 to 0x100. Use whichever is defined and assume
+ the OS knows what it is doing. */
+#ifdef FPA_PCR_CC_C1
+ if (pcr_tmp & FPA_PCR_CC_C1) printf_unfiltered(" C1");
+#else
+ if (pcr_tmp & FPA_PCR_CC_C0) printf_unfiltered(" C0");
+#endif
+
+ switch (pcr_tmp)
+ {
+ case FPA_PCR_CC_Z:
+ printf_unfiltered(" (Equal)");
break;
- case FPA_PCR_CC_C1:
- printf(" (Less than)");
+#ifdef FPA_PCR_CC_C1
+ case FPA_PCR_CC_C1:
+#else
+ case FPA_PCR_CC_C0:
+#endif
+ printf_unfiltered(" (Less than)");
break;
- case 0:
- printf(" (Greater than)");
+ case 0:
+ printf_unfiltered(" (Greater than)");
break;
- case FPA_PCR_CC_Z | FPA_PCR_CC_C1 | FPA_PCR_CC_C2:
- printf(" (Unordered)");
+ case FPA_PCR_CC_Z |
+#ifdef FPA_PCR_CC_C1
+ FPA_PCR_CC_C1
+#else
+ FPA_PCR_CC_C0
+#endif
+ | FPA_PCR_CC_C2:
+ printf_unfiltered(" (Unordered)");
break;
- default:
- printf(" (Undefined)");
+ default:
+ printf_unfiltered(" (Undefined)");
break;
- }
- printf("\n");
+ }
+ printf_unfiltered("\n");
pcr_tmp = pcr & FPA_PCR_AE;
- printf("\tAE= %#x", pcr_tmp);
- if (pcr_tmp & FPA_PCR_AE_DE) printf(" DE");
- if (pcr_tmp & FPA_PCR_AE_UOE) printf(" UOE");
- if (pcr_tmp & FPA_PCR_AE_PE) printf(" PE");
- if (pcr_tmp & FPA_PCR_AE_UE) printf(" UE");
- if (pcr_tmp & FPA_PCR_AE_OE) printf(" OE");
- if (pcr_tmp & FPA_PCR_AE_ZE) printf(" ZE");
- if (pcr_tmp & FPA_PCR_AE_EE) printf(" EE");
- if (pcr_tmp & FPA_PCR_AE_IE) printf(" IE");
- printf("\n");
+ printf_unfiltered("\tAE= %#x", pcr_tmp);
+ if (pcr_tmp & FPA_PCR_AE_DE) printf_unfiltered(" DE");
+ if (pcr_tmp & FPA_PCR_AE_UOE) printf_unfiltered(" UOE");
+ if (pcr_tmp & FPA_PCR_AE_PE) printf_unfiltered(" PE");
+ if (pcr_tmp & FPA_PCR_AE_UE) printf_unfiltered(" UE");
+ if (pcr_tmp & FPA_PCR_AE_OE) printf_unfiltered(" OE");
+ if (pcr_tmp & FPA_PCR_AE_ZE) printf_unfiltered(" ZE");
+ if (pcr_tmp & FPA_PCR_AE_EE) printf_unfiltered(" EE");
+ if (pcr_tmp & FPA_PCR_AE_IE) printf_unfiltered(" IE");
+ printf_unfiltered("\n");
}
print_1167_regs(regs)
for (i = 0; i < FPA_NREGS; i++) {
xf.l = regs[i];
- printf("%%fp%d: raw= %#x, single= %f", i+1, regs[i], xf.f);
+ printf_unfiltered("%%fp%d: raw= %#x, single= %f", i+1, regs[i], xf.f);
if (!(i & 1)) {
- printf("\n");
+ printf_unfiltered("\n");
} else {
xd.l[1] = regs[i];
xd.l[0] = regs[i+1];
- printf(", double= %f\n", xd.d);
+ printf_unfiltered(", double= %f\n", xd.d);
}
}
}
{
- printf("WTL 1167:");
+ printf_unfiltered("WTL 1167:");
if (ep.pr_fpa.fpa_pcr !=0) {
- printf("\n");
+ printf_unfiltered("\n");
print_1167_control_word(ep.pr_fpa.fpa_pcr);
print_1167_regs(ep.pr_fpa.fpa_regs);
} else {
- printf(" not in use.\n");
+ printf_unfiltered(" not in use.\n");
}
}
+#if 0 /* disabled because it doesn't go through the target vector. */
i386_float_info ()
{
char ubuf[UPAGES*NBPG];
print_fpu_status(regset);
print_fpa_status(regset);
}
+#endif
+
+static volatile int got_sigchld;
+
+/*ARGSUSED*/
+/* This will eventually be more interesting. */
+void
+sigchld_handler(signo)
+ int signo;
+{
+ got_sigchld++;
+}
+
+/*
+ * Signals for which the default action does not cause the process
+ * to die. See <sys/signal.h> for where this came from (alas, we
+ * can't use those macros directly)
+ */
+#ifndef sigmask
+#define sigmask(s) (1 << ((s) - 1))
+#endif
+#define SIGNALS_DFL_SAFE sigmask(SIGSTOP) | sigmask(SIGTSTP) | \
+ sigmask(SIGTTIN) | sigmask(SIGTTOU) | sigmask(SIGCHLD) | \
+ sigmask(SIGCONT) | sigmask(SIGWINCH) | sigmask(SIGPWR) | \
+ sigmask(SIGURG) | sigmask(SIGPOLL)
+
+#ifdef ATTACH_DETACH
+/*
+ * Thanks to XPT_MPDEBUGGER, we have to mange child_wait().
+ */
+int
+child_wait(pid, status)
+ int pid;
+ struct target_waitstatus *status;
+{
+ int save_errno, rv, xvaloff, saoff, sa_hand;
+ struct pt_stop pt;
+ struct user u;
+ sigset_t set;
+ /* Host signal number for a signal which the inferior terminates with, or
+ 0 if it hasn't terminated due to a signal. */
+ static int death_by_signal = 0;
+#ifdef SVR4_SHARED_LIBS /* use this to distinguish ptx 2 vs ptx 4 */
+ prstatus_t pstatus;
+#endif
+
+ do {
+ set_sigint_trap(); /* Causes SIGINT to be passed on to the
+ attached process. */
+ save_errno = errno;
+
+ got_sigchld = 0;
+
+ sigemptyset(&set);
+
+ while (got_sigchld == 0) {
+ sigsuspend(&set);
+ }
+
+ clear_sigint_trap();
+
+ rv = mptrace(XPT_STOPSTAT, 0, (char *)&pt, 0);
+ if (-1 == rv) {
+ printf("XPT_STOPSTAT: errno %d\n", errno); /* DEBUG */
+ continue;
+ }
+
+ pid = pt.ps_pid;
+
+ if (pid != inferior_pid) {
+ /* NOTE: the mystery fork in csh/tcsh needs to be ignored.
+ * We should not return new children for the initial run
+ * of a process until it has done the exec.
+ */
+ /* inferior probably forked; send it on its way */
+ rv = mptrace(XPT_UNDEBUG, pid, 0, 0);
+ if (-1 == rv) {
+ printf("child_wait: XPT_UNDEBUG: pid %d: %s\n", pid,
+ safe_strerror(errno));
+ }
+ continue;
+ }
+ /* FIXME: Do we deal with fork notification correctly? */
+ switch (pt.ps_reason) {
+ case PTS_FORK:
+ /* multi proc: treat like PTS_EXEC */
+ /*
+ * Pretend this didn't happen, since gdb isn't set up
+ * to deal with stops on fork.
+ */
+ rv = ptrace(PT_CONTSIG, pid, 1, 0);
+ if (-1 == rv) {
+ printf("PTS_FORK: PT_CONTSIG: error %d\n", errno);
+ }
+ continue;
+ case PTS_EXEC:
+ /*
+ * Pretend this is a SIGTRAP.
+ */
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = TARGET_SIGNAL_TRAP;
+ break;
+ case PTS_EXIT:
+ /*
+ * Note: we stop before the exit actually occurs. Extract
+ * the exit code from the uarea. If we're stopped in the
+ * exit() system call, the exit code will be in
+ * u.u_ap[0]. An exit due to an uncaught signal will have
+ * something else in here, see the comment in the default:
+ * case, below. Finally,let the process exit.
+ */
+ if (death_by_signal)
+ {
+ status->kind = TARGET_WAITKIND_SIGNALED;
+ status->value.sig = target_signal_from_host (death_by_signal);
+ death_by_signal = 0;
+ break;
+ }
+ xvaloff = (unsigned long)&u.u_ap[0] - (unsigned long)&u;
+ errno = 0;
+ rv = ptrace(PT_RUSER, pid, (char *)xvaloff, 0);
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = rv;
+ /*
+ * addr & data to mptrace() don't matter here, since
+ * the process is already dead.
+ */
+ rv = mptrace(XPT_UNDEBUG, pid, 0, 0);
+ if (-1 == rv) {
+ printf("child_wait: PTS_EXIT: XPT_UNDEBUG: pid %d error %d\n", pid,
+ errno);
+ }
+ break;
+ case PTS_WATCHPT_HIT:
+ fatal("PTS_WATCHPT_HIT\n");
+ break;
+ default:
+ /* stopped by signal */
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = target_signal_from_host (pt.ps_reason);
+ death_by_signal = 0;
+
+ if (0 == (SIGNALS_DFL_SAFE & sigmask(pt.ps_reason))) {
+ break;
+ }
+ /* else default action of signal is to die */
+#ifdef SVR4_SHARED_LIBS
+ rv = ptrace(PT_GET_PRSTATUS, pid, (char *)&pstatus, 0);
+ if (-1 == rv)
+ error("child_wait: signal %d PT_GET_PRSTATUS: %s\n",
+ pt.ps_reason, safe_strerror(errno));
+ if (pstatus.pr_cursig != pt.ps_reason) {
+ printf("pstatus signal %d, pt signal %d\n",
+ pstatus.pr_cursig, pt.ps_reason);
+ }
+ sa_hand = (int)pstatus.pr_action.sa_handler;
+#else
+ saoff = (unsigned long)&u.u_sa[0] - (unsigned long)&u;
+ saoff += sizeof(struct sigaction) * (pt.ps_reason - 1);
+ errno = 0;
+ sa_hand = ptrace(PT_RUSER, pid, (char *)saoff, 0);
+ if (errno)
+ error("child_wait: signal %d: RUSER: %s\n",
+ pt.ps_reason, safe_strerror(errno));
+#endif
+ if ((int)SIG_DFL == sa_hand) {
+ /* we will be dying */
+ death_by_signal = pt.ps_reason;
+ }
+ break;
+ }
+
+ } while (pid != inferior_pid); /* Some other child died or stopped */
+
+ return pid;
+}
+#else /* !ATTACH_DETACH */
+/*
+ * Simple child_wait() based on inftarg.c child_wait() for use until
+ * the MPDEBUGGER child_wait() works properly. This will go away when
+ * that is fixed.
+ */
+child_wait (pid, ourstatus)
+ int pid;
+ struct target_waitstatus *ourstatus;
+{
+ int save_errno;
+ int status;
+
+ do {
+ pid = wait (&status);
+ save_errno = errno;
+
+ if (pid == -1)
+ {
+ if (save_errno == EINTR)
+ continue;
+ fprintf (stderr, "Child process unexpectedly missing: %s.\n",
+ safe_strerror (save_errno));
+ ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
+ ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
+ return -1;
+ }
+ } while (pid != inferior_pid); /* Some other child died or stopped */
+ store_waitstatus (ourstatus, status);
+ return pid;
+}
+#endif /* ATTACH_DETACH */
+
+
+\f
+/* This function simply calls ptrace with the given arguments.
+ It exists so that all calls to ptrace are isolated in this
+ machine-dependent file. */
+int
+call_ptrace (request, pid, addr, data)
+ int request, pid;
+ PTRACE_ARG3_TYPE addr;
+ int data;
+{
+ return ptrace (request, pid, addr, data);
+}
+
+int
+call_mptrace(request, pid, addr, data)
+ int request, pid;
+ PTRACE_ARG3_TYPE addr;
+ int data;
+{
+ return mptrace(request, pid, addr, data);
+}
+
+#if defined (DEBUG_PTRACE)
+/* For the rest of the file, use an extra level of indirection */
+/* This lets us breakpoint usefully on call_ptrace. */
+#define ptrace call_ptrace
+#define mptrace call_mptrace
+#endif
+
+void
+kill_inferior ()
+{
+ if (inferior_pid == 0)
+ return;
+
+ /* For MPDEBUGGER, don't use PT_KILL, since the child will stop
+ again with a PTS_EXIT. Just hit him with SIGKILL (so he stops)
+ and detach. */
+
+ kill (inferior_pid, SIGKILL);
+#ifdef ATTACH_DETACH
+ detach(SIGKILL);
+#else /* ATTACH_DETACH */
+ ptrace(PT_KILL, inferior_pid, 0, 0);
+ wait((int *)NULL);
+#endif /* ATTACH_DETACH */
+ target_mourn_inferior ();
+}
+
+/* Resume execution of the inferior process.
+ If STEP is nonzero, single-step it.
+ If SIGNAL is nonzero, give it that signal. */
+
+void
+child_resume (pid, step, signal)
+ int pid;
+ int step;
+ enum target_signal signal;
+{
+ errno = 0;
+
+ if (pid == -1)
+ pid = inferior_pid;
+
+ /* An address of (PTRACE_ARG3_TYPE)1 tells ptrace to continue from where
+ it was. (If GDB wanted it to start some other way, we have already
+ written a new PC value to the child.)
+
+ If this system does not support PT_SSTEP, a higher level function will
+ have called single_step() to transmute the step request into a
+ continue request (by setting breakpoints on all possible successor
+ instructions), so we don't have to worry about that here. */
+
+ if (step)
+ ptrace (PT_SSTEP, pid, (PTRACE_ARG3_TYPE) 1, signal);
+ else
+ ptrace (PT_CONTSIG, pid, (PTRACE_ARG3_TYPE) 1, signal);
+
+ if (errno)
+ perror_with_name ("ptrace");
+}
+\f
+#ifdef ATTACH_DETACH
+/* Start debugging the process whose number is PID. */
+int
+attach (pid)
+ int pid;
+{
+ sigset_t set;
+ int rv;
+
+ rv = mptrace(XPT_DEBUG, pid, 0, 0);
+ if (-1 == rv) {
+ error("mptrace(XPT_DEBUG): %s", safe_strerror(errno));
+ }
+ rv = mptrace(XPT_SIGNAL, pid, 0, SIGSTOP);
+ if (-1 == rv) {
+ error("mptrace(XPT_SIGNAL): %s", safe_strerror(errno));
+ }
+ attach_flag = 1;
+ return pid;
+}
+
+void
+detach (signo)
+ int signo;
+{
+ int rv;
+
+ rv = mptrace(XPT_UNDEBUG, inferior_pid, 1, signo);
+ if (-1 == rv) {
+ error("mptrace(XPT_UNDEBUG): %s", safe_strerror(errno));
+ }
+ attach_flag = 0;
+}
+
+#endif /* ATTACH_DETACH */
+\f
+/* Default the type of the ptrace transfer to int. */
+#ifndef PTRACE_XFER_TYPE
+#define PTRACE_XFER_TYPE int
+#endif
+
+\f
+/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
+ in the NEW_SUN_PTRACE case.
+ It ought to be straightforward. But it appears that writing did
+ not write the data that I specified. I cannot understand where
+ it got the data that it actually did write. */
+
+/* Copy LEN bytes to or from inferior's memory starting at MEMADDR
+ to debugger memory starting at MYADDR. Copy to inferior if
+ WRITE is nonzero.
+
+ Returns the length copied, which is either the LEN argument or zero.
+ This xfer function does not do partial moves, since child_ops
+ doesn't allow memory operations to cross below us in the target stack
+ anyway. */
+
+int
+child_xfer_memory (memaddr, myaddr, len, write, target)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+ int write;
+ struct target_ops *target; /* ignored */
+{
+ register int i;
+ /* Round starting address down to longword boundary. */
+ register CORE_ADDR addr = memaddr & - sizeof (PTRACE_XFER_TYPE);
+ /* Round ending address up; get number of longwords that makes. */
+ register int count
+ = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1)
+ / sizeof (PTRACE_XFER_TYPE);
+ /* Allocate buffer of that many longwords. */
+ register PTRACE_XFER_TYPE *buffer
+ = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE));
+
+ if (write)
+ {
+ /* Fill start and end extra bytes of buffer with existing memory data. */
+
+ if (addr != memaddr || len < (int) sizeof (PTRACE_XFER_TYPE)) {
+ /* Need part of initial word -- fetch it. */
+ buffer[0] = ptrace (PT_RTEXT, inferior_pid, (PTRACE_ARG3_TYPE) addr,
+ 0);
+ }
+
+ if (count > 1) /* FIXME, avoid if even boundary */
+ {
+ buffer[count - 1]
+ = ptrace (PT_RTEXT, inferior_pid,
+ ((PTRACE_ARG3_TYPE)
+ (addr + (count - 1) * sizeof (PTRACE_XFER_TYPE))),
+ 0);
+ }
+
+ /* Copy data to be written over corresponding part of buffer */
+
+ memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)),
+ myaddr,
+ len);
+
+ /* Write the entire buffer. */
+
+ for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
+ {
+ errno = 0;
+ ptrace (PT_WDATA, inferior_pid, (PTRACE_ARG3_TYPE) addr,
+ buffer[i]);
+ if (errno)
+ {
+ /* Using the appropriate one (I or D) is necessary for
+ Gould NP1, at least. */
+ errno = 0;
+ ptrace (PT_WTEXT, inferior_pid, (PTRACE_ARG3_TYPE) addr,
+ buffer[i]);
+ }
+ if (errno)
+ return 0;
+ }
+ }
+ else
+ {
+ /* Read all the longwords */
+ for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
+ {
+ errno = 0;
+ buffer[i] = ptrace (PT_RTEXT, inferior_pid,
+ (PTRACE_ARG3_TYPE) addr, 0);
+ if (errno)
+ return 0;
+ QUIT;
+ }
+
+ /* Copy appropriate bytes out of the buffer. */
+ memcpy (myaddr,
+ (char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)),
+ len);
+ }
+ return len;
+}
+
+
+void
+_initialize_symm_nat ()
+{
+#ifdef ATTACH_DETACH
+/*
+ * the MPDEBUGGER is necessary for process tree debugging and attach
+ * to work, but it alters the behavior of debugged processes, so other
+ * things (at least child_wait()) will have to change to accomodate
+ * that.
+ *
+ * Note that attach is not implemented in dynix 3, and not in ptx
+ * until version 2.1 of the OS.
+ */
+ int rv;
+ sigset_t set;
+ struct sigaction sact;
+
+ rv = mptrace(XPT_MPDEBUGGER, 0, 0, 0);
+ if (-1 == rv) {
+ fatal("_initialize_symm_nat(): mptrace(XPT_MPDEBUGGER): %s",
+ safe_strerror(errno));
+ }
+
+ /*
+ * Under MPDEBUGGER, we get SIGCLHD when a traced process does
+ * anything of interest.
+ */
+
+ /*
+ * Block SIGCHLD. We leave it blocked all the time, and then
+ * call sigsuspend() in child_wait() to wait for the child
+ * to do something. None of these ought to fail, but check anyway.
+ */
+ sigemptyset(&set);
+ rv = sigaddset(&set, SIGCHLD);
+ if (-1 == rv) {
+ fatal("_initialize_symm_nat(): sigaddset(SIGCHLD): %s",
+ safe_strerror(errno));
+ }
+ rv = sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL);
+ if (-1 == rv) {
+ fatal("_initialize_symm_nat(): sigprocmask(SIG_BLOCK): %s",
+ safe_strerror(errno));
+ }
+
+ sact.sa_handler = sigchld_handler;
+ sigemptyset(&sact.sa_mask);
+ sact.sa_flags = SA_NOCLDWAIT; /* keep the zombies away */
+ rv = sigaction(SIGCHLD, &sact, (struct sigaction *)NULL);
+ if (-1 == rv) {
+ fatal("_initialize_symm_nat(): sigaction(SIGCHLD): %s",
+ safe_strerror(errno));
+ }
+#endif
+}
projects / deliverable / binutils-gdb.git / blobdiff