| /* Sequent Symmetry host interface, for GDB when running under Unix. |
| Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1999, 2000, |
| 2001 |
| 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" |
| #include "regcache.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 (int regno) |
| { |
| struct pt_regset regs; |
| int i; |
| |
| /* 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, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) & regs, 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, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) & regs, 0); |
| } |
| |
| void |
| fetch_inferior_registers (int regno) |
| { |
| int i; |
| struct pt_regset regs; |
| |
| registers_fetched (); |
| |
| mptrace (XPT_RREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) & regs, 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 (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 (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 (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 (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 (void) |
| { |
| char ubuf[UPAGES * NBPG]; |
| struct pt_regset regset; |
| |
| if (have_inferior_p ()) |
| { |
| PTRACE_READ_REGS (PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) & regset); |
| } |
| 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 (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(). |
| */ |
| ptid_t |
| child_wait (ptid_t ptid, 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 |
| int pid = PIDGET (ptid); |
| |
| 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 != PIDGET (inferior_ptid)) |
| { |
| /* 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: |
| internal_error (__FILE__, __LINE__, |
| "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 != PIDGET (inferior_ptid)); /* Some other child died or stopped */ |
| |
| return pid_to_ptid (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. |
| */ |
| ptid_t |
| child_wait (ptid_t ptid, struct target_waitstatus *ourstatus) |
| { |
| int save_errno; |
| int status; |
| int pid = PIDGET (ptid); |
| |
| 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 pid_to_ptid (-1); |
| } |
| } |
| while (pid != PIDGET (inferior_ptid)); /* Some other child died or stopped */ |
| store_waitstatus (ourstatus, status); |
| return pid_to_ptid (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 (int request, int pid, PTRACE_ARG3_TYPE addr, int data) |
| { |
| return ptrace (request, pid, addr, data); |
| } |
| |
| int |
| call_mptrace (int request, int 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 (void) |
| { |
| if (ptid_equal (inferior_ptid, null_ptid)) |
| 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 (PIDGET (inferior_ptid), SIGKILL); |
| #ifdef ATTACH_DETACH |
| detach (SIGKILL); |
| #else /* ATTACH_DETACH */ |
| ptrace (PT_KILL, PIDGET (inferior_ptid), 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 (ptid_t ptid, int step, enum target_signal signal) |
| { |
| int pid = PIDGET (ptid); |
| |
| errno = 0; |
| |
| if (pid == -1) |
| pid = PIDGET (inferior_ptid); |
| |
| /* 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 (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 (int signo) |
| { |
| int rv; |
| |
| rv = mptrace (XPT_UNDEBUG, PIDGET (inferior_ptid), 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. TARGET is ignored. |
| |
| 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 (CORE_ADDR memaddr, char *myaddr, int len, int write, |
| struct mem_attrib *attrib, |
| struct target_ops *target) |
| { |
| register int i; |
| /* Round starting address down to longword boundary. */ |
| register CORE_ADDR addr = memaddr & -(CORE_ADDR) 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. */ |
| /* FIXME (alloca): This code, cloned from infptrace.c, is unsafe |
| because it uses alloca to allocate a buffer of arbitrary size. |
| For very large xfers, this could crash GDB's stack. */ |
| 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, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) addr, |
| 0); |
| } |
| |
| if (count > 1) /* FIXME, avoid if even boundary */ |
| { |
| buffer[count - 1] |
| = ptrace (PT_RTEXT, PIDGET (inferior_ptid), |
| ((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, PIDGET (inferior_ptid), (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, PIDGET (inferior_ptid), (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, PIDGET (inferior_ptid), |
| (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 (void) |
| { |
| #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) |
| { |
| internal_error (__FILE__, __LINE__, |
| "_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) |
| { |
| internal_error (__FILE__, __LINE__, |
| "_initialize_symm_nat(): sigaddset(SIGCHLD): %s", |
| safe_strerror (errno)); |
| } |
| rv = sigprocmask (SIG_BLOCK, &set, (sigset_t *) NULL); |
| if (-1 == rv) |
| { |
| internal_error (__FILE__, __LINE__, |
| "_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) |
| { |
| internal_error (__FILE__, __LINE__, |
| "_initialize_symm_nat(): sigaction(SIGCHLD): %s", |
| safe_strerror (errno)); |
| } |
| #endif |
| } |