diff options
Diffstat (limited to 'gdb/symm-nat.c')
| -rw-r--r-- | gdb/symm-nat.c | 846 |
1 files changed, 0 insertions, 846 deletions
diff --git a/gdb/symm-nat.c b/gdb/symm-nat.c deleted file mode 100644 index 0461066..0000000 --- a/gdb/symm-nat.c +++ /dev/null @@ -1,846 +0,0 @@ -/* Sequent Symmetry host interface, for GDB when running under Unix. - Copyright 1986, 1987, 1989, 1991, 1992, 1994 Free Software Foundation, Inc. - -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., 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 "defs.h" -#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 "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> -#define TERMINAL struct sgttyb - -#include "gdbcore.h" - -void -store_inferior_registers(regno) -int regno; -{ - struct pt_regset regs; - 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_edx = *(int *)®isters[REGISTER_BYTE(1)]; - regs.pr_esi = *(int *)®isters[REGISTER_BYTE(6)]; - regs.pr_edi = *(int *)®isters[REGISTER_BYTE(7)]; - regs.pr_esp = *(int *)®isters[REGISTER_BYTE(14)]; - regs.pr_ebp = *(int *)®isters[REGISTER_BYTE(15)]; - regs.pr_eip = *(int *)®isters[REGISTER_BYTE(16)]; - regs.pr_flags = *(int *)®isters[REGISTER_BYTE(17)]; - for (i = 0; i < 31; i++) - { - regs.pr_fpa.fpa_regs[i] = - *(int *)®isters[REGISTER_BYTE(FP1_REGNUM+i)]; - } - 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 -fetch_inferior_registers (regno) - int regno; -{ - int i; - struct pt_regset regs; - extern char registers[]; - - registers_fetched (); - - 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 *)®isters[REGISTER_BYTE(EDX_REGNUM)] = regs.pr_edx; - *(int *)®isters[REGISTER_BYTE(ESI_REGNUM)] = regs.pr_esi; - *(int *)®isters[REGISTER_BYTE(EDI_REGNUM)] = regs.pr_edi; - *(int *)®isters[REGISTER_BYTE(EBP_REGNUM)] = regs.pr_ebp; - *(int *)®isters[REGISTER_BYTE(ESP_REGNUM)] = regs.pr_esp; - *(int *)®isters[REGISTER_BYTE(EIP_REGNUM)] = regs.pr_eip; - *(int *)®isters[REGISTER_BYTE(EFLAGS_REGNUM)] = regs.pr_flags; - for (i = 0; i < FPA_NREGS; i++) - { - *(int *)®isters[REGISTER_BYTE(FP1_REGNUM+i)] = - regs.pr_fpa.fpa_regs[i]; - } - memcpy (®isters[REGISTER_BYTE(ST0_REGNUM)], regs.pr_fpu.fpu_stack[0], 10); - memcpy (®isters[REGISTER_BYTE(ST1_REGNUM)], regs.pr_fpu.fpu_stack[1], 10); - memcpy (®isters[REGISTER_BYTE(ST2_REGNUM)], regs.pr_fpu.fpu_stack[2], 10); - memcpy (®isters[REGISTER_BYTE(ST3_REGNUM)], regs.pr_fpu.fpu_stack[3], 10); - memcpy (®isters[REGISTER_BYTE(ST4_REGNUM)], regs.pr_fpu.fpu_stack[4], 10); - memcpy (®isters[REGISTER_BYTE(ST5_REGNUM)], regs.pr_fpu.fpu_stack[5], 10); - memcpy (®isters[REGISTER_BYTE(ST6_REGNUM)], regs.pr_fpu.fpu_stack[6], 10); - memcpy (®isters[REGISTER_BYTE(ST7_REGNUM)], regs.pr_fpu.fpu_stack[7], 10); -} - -/* FIXME: This should be merged with i387-tdep.c as well. */ -static -print_fpu_status(ep) -struct pt_regset ep; -{ - int i; - int bothstatus; - int top; - int fpreg; - unsigned char *p; - - printf_unfiltered("80387:"); - if (ep.pr_fpu.fpu_ip == 0) { - printf_unfiltered(" not in use.\n"); - return; - } else { - 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_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_unfiltered ("regno tag msb lsb value\n"); - for (fpreg = 7; fpreg >= 0; fpreg--) - { - double val; - - printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg); - - switch ((ep.pr_fpu.fpu_tag >> (fpreg * 2)) & 3) - { - 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_unfiltered ("%02x", ep.pr_fpu.fpu_stack[fpreg][i]); - - 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); - if (ep.pr_fpu.fpu_rsvd2) - warning ("rsvd2 is 0x%x\n", ep.pr_fpu.fpu_rsvd2); - if (ep.pr_fpu.fpu_rsvd3) - warning ("rsvd3 is 0x%x\n", ep.pr_fpu.fpu_rsvd3); - if (ep.pr_fpu.fpu_rsvd5) - warning ("rsvd5 is 0x%x\n", ep.pr_fpu.fpu_rsvd5); -} - - -print_1167_control_word(pcr) -unsigned int pcr; - -{ - int pcr_tmp; - - pcr_tmp = pcr & FPA_PCR_MODE; - printf_unfiltered("\tMODE= %#x; RND= %#x ", pcr_tmp, pcr_tmp & 12); - switch (pcr_tmp & 12) { - case 0: - printf_unfiltered("RN (Nearest Value)"); - break; - case 1: - printf_unfiltered("RZ (Zero)"); - break; - case 2: - printf_unfiltered("RP (Positive Infinity)"); - break; - case 3: - printf_unfiltered("RM (Negative Infinity)"); - break; - } - printf_unfiltered("; IRND= %d ", pcr_tmp & 2); - if (0 == pcr_tmp & 2) { - printf_unfiltered("(same as RND)\n"); - } else { - printf_unfiltered("(toward zero)\n"); - } - pcr_tmp = pcr & FPA_PCR_EM; - 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_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; -#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_unfiltered(" (Greater than)"); - break; - 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_unfiltered(" (Undefined)"); - break; - } - printf_unfiltered("\n"); - pcr_tmp = pcr & FPA_PCR_AE; - 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) -long regs[FPA_NREGS]; - -{ - int i; - - union { - double d; - long l[2]; - } xd; - union { - float f; - long l; - } xf; - - - for (i = 0; i < FPA_NREGS; i++) { - xf.l = regs[i]; - printf_unfiltered("%%fp%d: raw= %#x, single= %f", i+1, regs[i], xf.f); - if (!(i & 1)) { - printf_unfiltered("\n"); - } else { - xd.l[1] = regs[i]; - xd.l[0] = regs[i+1]; - printf_unfiltered(", double= %f\n", xd.d); - } - } -} - -print_fpa_status(ep) -struct pt_regset ep; - -{ - - printf_unfiltered("WTL 1167:"); - if (ep.pr_fpa.fpa_pcr !=0) { - printf_unfiltered("\n"); - print_1167_control_word(ep.pr_fpa.fpa_pcr); - print_1167_regs(ep.pr_fpa.fpa_regs); - } else { - 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]; - struct pt_regset regset; - - if (have_inferior_p()) - { - PTRACE_READ_REGS (inferior_pid, (PTRACE_ARG3_TYPE) ®set); - } - else - { - int corechan = bfd_cache_lookup (core_bfd); - if (lseek (corechan, 0, 0) < 0) - { - perror ("seek on core file"); - } - if (myread (corechan, ubuf, UPAGES*NBPG) < 0) - { - perror ("read on core file"); - } - /* only interested in the floating point registers */ - regset.pr_fpu = ((struct user *) ubuf)->u_fpusave; - regset.pr_fpa = ((struct user *) ubuf)->u_fpasave; - } - 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 */ - - - -/* 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"); -} - -#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 */ - -/* Default the type of the ptrace transfer to int. */ -#ifndef PTRACE_XFER_TYPE -#define PTRACE_XFER_TYPE int -#endif - - -/* 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 -} |