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author | Mark Kettenis <kettenis@gnu.org> | 2004-12-18 17:36:33 +0000 |
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committer | Mark Kettenis <kettenis@gnu.org> | 2004-12-18 17:36:33 +0000 |
commit | 87285d5bcb0f5584fe164007d6df1addfaec3850 (patch) | |
tree | 5f38e18b5eab6b91c753f10b6e5aa6def66e095d /gdb/hppah-nat.c | |
parent | 1a20add74a2e59f528fe5e667a2cf6c135a4e2d4 (diff) | |
download | gdb-87285d5bcb0f5584fe164007d6df1addfaec3850.zip gdb-87285d5bcb0f5584fe164007d6df1addfaec3850.tar.gz gdb-87285d5bcb0f5584fe164007d6df1addfaec3850.tar.bz2 |
* hppah-nat.c: Remove file.
* infttrace.h: Remove file.
* infttrace.c: Remove file.
* Makefile.in (ALLDEPFILES): Remove hppah-nat.c
(infttrace_h): Remove variable.
(hppah-nat.o, infttrace.o): Remove dependencies.
* configure.host (hppa*64*-*-hpux11*): Remove.
* config/pa/hpux11w.mh: Remove file.
* config/pa/nm-hppah.h: Remove file.
* config/pa/nm-hppah11.h: Remove file.
Diffstat (limited to 'gdb/hppah-nat.c')
-rw-r--r-- | gdb/hppah-nat.c | 1440 |
1 files changed, 0 insertions, 1440 deletions
diff --git a/gdb/hppah-nat.c b/gdb/hppah-nat.c deleted file mode 100644 index bf6af6d..0000000 --- a/gdb/hppah-nat.c +++ /dev/null @@ -1,1440 +0,0 @@ -/* Native support code for HPUX PA-RISC, for GDB the GNU debugger. - - Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, - 1996, 1998, 1999, 2000, 2001, 2004 Free Software Foundation, Inc. - - Contributed by the Center for Software Science at the - University of Utah (pa-gdb-bugs@cs.utah.edu). - - 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. */ - - -#include "defs.h" -#include "inferior.h" -#include "target.h" -#include <sys/ptrace.h> -#include "gdbcore.h" -#include "gdb_wait.h" -#include "regcache.h" -#include "gdb_string.h" -#include "infttrace.h" -#include <signal.h> - -#include "hppa-tdep.h" - -static CORE_ADDR text_end; - -void -deprecated_hpux_text_end (struct target_ops *exec_ops) -{ - struct section_table *p; - - /* Set text_end to the highest address of the end of any readonly - code section. */ - /* FIXME: The comment above does not match the code. The code - checks for sections with are either code *or* readonly. */ - text_end = (CORE_ADDR) 0; - for (p = exec_ops->to_sections; p < exec_ops->to_sections_end; p++) - if (bfd_get_section_flags (p->bfd, p->the_bfd_section) - & (SEC_CODE | SEC_READONLY)) - { - if (text_end < p->endaddr) - text_end = p->endaddr; - } -} - - -static void fetch_register (int); - -void -fetch_inferior_registers (int regno) -{ - if (regno == -1) - for (regno = 0; regno < NUM_REGS; regno++) - fetch_register (regno); - else - fetch_register (regno); -} - -/* Our own version of the offsetof macro, since we can't assume ANSI C. */ -#define HPPAH_OFFSETOF(type, member) ((int) (&((type *) 0)->member)) - -/* 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). */ - -void -store_inferior_registers (int regno) -{ - unsigned int regaddr; - char buf[80]; - int i; - unsigned int offset = U_REGS_OFFSET; - int scratch; - - if (regno >= 0) - { - unsigned int addr, len, offset; - - if (CANNOT_STORE_REGISTER (regno)) - return; - - offset = 0; - len = register_size (current_gdbarch, regno); - - /* Requests for register zero actually want the save_state's - ss_flags member. As RM says: "Oh, what a hack!" */ - if (regno == 0) - { - save_state_t ss; - addr = HPPAH_OFFSETOF (save_state_t, ss_flags); - len = sizeof (ss.ss_flags); - - /* Note that ss_flags is always an int, no matter what - register_size (0) says. Assuming all HP-UX PA machines - are big-endian, put it at the least significant end of - the value, and zap the rest of the buffer. */ - offset = register_size (current_gdbarch, 0) - len; - } - - /* Floating-point registers come from the ss_fpblock area. */ - else if (regno >= HPPA_FP0_REGNUM) - addr = HPPAH_OFFSETOF (save_state_t, ss_fpblock) - + ((regno - HPPA_FP0_REGNUM) - * register_size (current_gdbarch, regno)); - - /* Wide registers come from the ss_wide area. - I think it's more PC to test (ss_flags & SS_WIDEREGS) to select - between ss_wide and ss_narrow than to use the raw register size. - But checking ss_flags would require an extra ptrace call for - every register reference. Bleah. */ - else if (len == 8) - addr = HPPAH_OFFSETOF (save_state_t, ss_wide) - + regno * 8; - - /* Narrow registers come from the ss_narrow area. Note that - ss_narrow starts with gr1, not gr0. */ - else if (len == 4) - addr = HPPAH_OFFSETOF (save_state_t, ss_narrow) - + (regno - 1) * 4; - else - internal_error (__FILE__, __LINE__, - "hppah-nat.c (write_register): unexpected register size"); - -#ifdef GDB_TARGET_IS_HPPA_20W - /* Unbelieveable. The PC head and tail must be written in 64bit hunks - or we will get an error. Worse yet, the oddball ptrace/ttrace - layering will not allow us to perform a 64bit register store. - - What a crock. */ - if ((regno == HPPA_PCOQ_HEAD_REGNUM || regno == HPPA_PCOQ_TAIL_REGNUM) && len == 8) - { - CORE_ADDR temp; - - regcache_raw_read (current_regcache, regno, &temp); - - /* Set the priv level (stored in the low two bits of the PC. */ - temp |= 0x3; - - ttrace_write_reg_64 (PIDGET (inferior_ptid), (CORE_ADDR)addr, - (CORE_ADDR)&temp); - - /* If we fail to write the PC, give a true error instead of - just a warning. */ - if (errno != 0) - { - char *err = safe_strerror (errno); - char *msg = alloca (strlen (err) + 128); - sprintf (msg, "writing `%s' register: %s", - REGISTER_NAME (regno), err); - perror_with_name (msg); - } - return; - } - - /* Another crock. HPUX complains if you write a nonzero value to - the high part of IPSW. What will it take for HP to catch a - clue about building sensible interfaces? */ - if (regno == HPPA_IPSW_REGNUM && len == 8) - { - int temp = 0; - - regcache_raw_write_part (current_regcache, regno, 0, - sizeof (int), &temp); - } -#endif - - for (i = 0; i < len; i += sizeof (int)) - { - int temp; - - errno = 0; - regcache_raw_read_part (current_regcache, regno, i, - sizeof (int), &temp); - call_ptrace (PT_WUREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) addr + i, - temp); - if (errno != 0) - { - /* Warning, not error, in case we are attached; sometimes - the kernel doesn't let us at the registers. */ - char *err = safe_strerror (errno); - char *msg = alloca (strlen (err) + 128); - sprintf (msg, "writing `%s' register: %s", - REGISTER_NAME (regno), err); - /* If we fail to write the PC, give a true error instead of - just a warning. */ - if (regno == HPPA_PCOQ_HEAD_REGNUM || regno == HPPA_PCOQ_TAIL_REGNUM) - perror_with_name (msg); - else - warning (msg); - return; - } - } - } - else - for (regno = 0; regno < NUM_REGS; regno++) - store_inferior_registers (regno); -} - - -/* Fetch a register's value from the process's U area. */ -static void -fetch_register (int regno) -{ - char buf[MAX_REGISTER_SIZE]; - unsigned int addr, len, offset; - int i; - - offset = 0; - len = register_size (current_gdbarch, regno); - - /* Requests for register zero actually want the save_state's - ss_flags member. As RM says: "Oh, what a hack!" */ - if (regno == 0) - { - save_state_t ss; - addr = HPPAH_OFFSETOF (save_state_t, ss_flags); - len = sizeof (ss.ss_flags); - - /* Note that ss_flags is always an int, no matter what - register_size (0) says. Assuming all HP-UX PA machines are - big-endian, put it at the least significant end of the value, - and zap the rest of the buffer. */ - offset = register_size (current_gdbarch, 0) - len; - memset (buf, 0, sizeof (buf)); - } - - /* Floating-point registers come from the ss_fpblock area. */ - else if (regno >= HPPA_FP0_REGNUM) - addr = (HPPAH_OFFSETOF (save_state_t, ss_fpblock) - + (DEPRECATED_REGISTER_BYTE (regno) - DEPRECATED_REGISTER_BYTE (HPPA_FP0_REGNUM))); - - /* Wide registers come from the ss_wide area. - I think it's more PC to test (ss_flags & SS_WIDEREGS) to select - between ss_wide and ss_narrow than to use the raw register size. - But checking ss_flags would require an extra ptrace call for - every register reference. Bleah. */ - else if (len == 8) - addr = (HPPAH_OFFSETOF (save_state_t, ss_wide) - + DEPRECATED_REGISTER_BYTE (regno)); - - /* Narrow registers come from the ss_narrow area. Note that - ss_narrow starts with gr1, not gr0. */ - else if (len == 4) - addr = (HPPAH_OFFSETOF (save_state_t, ss_narrow) - + (DEPRECATED_REGISTER_BYTE (regno) - DEPRECATED_REGISTER_BYTE (1))); - - else - internal_error (__FILE__, __LINE__, - "hppa-nat.c (fetch_register): unexpected register size"); - - for (i = 0; i < len; i += sizeof (int)) - { - errno = 0; - /* Copy an int from the U area to buf. Fill the least - significant end if len != raw_size. */ - * (int *) &buf[offset + i] = - call_ptrace (PT_RUREGS, PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) addr + i, 0); - if (errno != 0) - { - /* Warning, not error, in case we are attached; sometimes - the kernel doesn't let us at the registers. */ - char *err = safe_strerror (errno); - char *msg = alloca (strlen (err) + 128); - sprintf (msg, "reading `%s' register: %s", - REGISTER_NAME (regno), err); - warning (msg); - return; - } - } - - /* If we're reading an address from the instruction address queue, - mask out the bottom two bits --- they contain the privilege - level. */ - if (regno == HPPA_PCOQ_HEAD_REGNUM || regno == HPPA_PCOQ_TAIL_REGNUM) - buf[len - 1] &= ~0x3; - - regcache_raw_supply (current_regcache, regno, buf); -} - - -/* 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 - deprecated_child_ops doesn't allow memory operations to cross below - us in the target stack anyway. TARGET is ignored. */ - -int -child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, - struct mem_attrib *mem, - struct target_ops *target) -{ - int i; - /* Round starting address down to longword boundary. */ - CORE_ADDR addr = memaddr & - (CORE_ADDR)(sizeof (int)); - /* Round ending address up; get number of longwords that makes. */ - int count - = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); - - /* Allocate buffer of that many longwords. - Note -- do not use alloca to allocate this buffer since there is no - guarantee of when the buffer will actually be deallocated. - - This routine can be called over and over with the same call chain; - this (in effect) would pile up all those alloca requests until a call - to alloca was made from a point higher than this routine in the - call chain. */ - int *buffer = (int *) xmalloc (count * sizeof (int)); - - if (write) - { - /* Fill start and end extra bytes of buffer with existing memory data. */ - if (addr != memaddr || len < (int) sizeof (int)) - { - /* Need part of initial word -- fetch it. */ - buffer[0] = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER, - PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) addr, 0); - } - - if (count > 1) /* FIXME, avoid if even boundary */ - { - buffer[count - 1] - = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER, - PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) (addr - + (count - 1) * sizeof (int)), - 0); - } - - /* Copy data to be written over corresponding part of buffer */ - memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); - - /* Write the entire buffer. */ - for (i = 0; i < count; i++, addr += sizeof (int)) - { - int pt_status; - int pt_request; - /* The HP-UX kernel crashes if you use PT_WDUSER to write into the - text segment. FIXME -- does it work to write into the data - segment using WIUSER, or do these idiots really expect us to - figure out which segment the address is in, so we can use a - separate system call for it??! */ - errno = 0; - pt_request = (addr < text_end) ? PT_WIUSER : PT_WDUSER; - pt_status = call_ptrace (pt_request, - PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) addr, - buffer[i]); - - /* Did we fail? Might we've guessed wrong about which - segment this address resides in? Try the other request, - and see if that works... */ - if ((pt_status == -1) && errno) - { - errno = 0; - pt_request = (pt_request == PT_WIUSER) ? PT_WDUSER : PT_WIUSER; - pt_status = call_ptrace (pt_request, - PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) addr, - buffer[i]); - - /* No, we still fail. Okay, time to punt. */ - if ((pt_status == -1) && errno) - { - xfree (buffer); - return 0; - } - } - } - } - else - { - /* Read all the longwords */ - for (i = 0; i < count; i++, addr += sizeof (int)) - { - errno = 0; - buffer[i] = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER, - PIDGET (inferior_ptid), - (PTRACE_ARG3_TYPE) addr, 0); - if (errno) - { - xfree (buffer); - return 0; - } - QUIT; - } - - /* Copy appropriate bytes out of the buffer. */ - memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); - } - xfree (buffer); - return len; -} - -char *saved_child_execd_pathname = NULL; -int saved_vfork_pid; -enum { - STATE_NONE, - STATE_GOT_CHILD, - STATE_GOT_EXEC, - STATE_GOT_PARENT, - STATE_FAKE_EXEC -} saved_vfork_state = STATE_NONE; - -int -child_follow_fork (int follow_child) -{ - ptid_t last_ptid; - struct target_waitstatus last_status; - int has_vforked; - int parent_pid, child_pid; - - get_last_target_status (&last_ptid, &last_status); - has_vforked = (last_status.kind == TARGET_WAITKIND_VFORKED); - parent_pid = ptid_get_pid (last_ptid); - child_pid = last_status.value.related_pid; - - /* At this point, if we are vforking, breakpoints were already - detached from the child in child_wait; and the child has already - called execve(). If we are forking, both the parent and child - have breakpoints inserted. */ - - if (! follow_child) - { - if (! has_vforked) - { - detach_breakpoints (child_pid); -#ifdef SOLIB_REMOVE_INFERIOR_HOOK - SOLIB_REMOVE_INFERIOR_HOOK (child_pid); -#endif - } - - /* Detach from the child. */ - printf_unfiltered ("Detaching after fork from %s\n", - target_pid_to_str (pid_to_ptid (child_pid))); - hppa_require_detach (child_pid, 0); - - /* The parent and child of a vfork share the same address space. - Also, on some targets the order in which vfork and exec events - are received for parent in child requires some delicate handling - of the events. - - For instance, on ptrace-based HPUX we receive the child's vfork - event first, at which time the parent has been suspended by the - OS and is essentially untouchable until the child's exit or second - exec event arrives. At that time, the parent's vfork event is - delivered to us, and that's when we see and decide how to follow - the vfork. But to get to that point, we must continue the child - until it execs or exits. To do that smoothly, all breakpoints - must be removed from the child, in case there are any set between - the vfork() and exec() calls. But removing them from the child - also removes them from the parent, due to the shared-address-space - nature of a vfork'd parent and child. On HPUX, therefore, we must - take care to restore the bp's to the parent before we continue it. - Else, it's likely that we may not stop in the expected place. (The - worst scenario is when the user tries to step over a vfork() call; - the step-resume bp must be restored for the step to properly stop - in the parent after the call completes!) - - Sequence of events, as reported to gdb from HPUX: - - Parent Child Action for gdb to take - ------------------------------------------------------- - 1 VFORK Continue child - 2 EXEC - 3 EXEC or EXIT - 4 VFORK - - Now that the child has safely exec'd or exited, we must restore - the parent's breakpoints before we continue it. Else, we may - cause it run past expected stopping points. */ - - if (has_vforked) - reattach_breakpoints (parent_pid); - } - else - { - /* Needed to keep the breakpoint lists in sync. */ - if (! has_vforked) - detach_breakpoints (child_pid); - - /* Before detaching from the parent, remove all breakpoints from it. */ - remove_breakpoints (); - - /* Also reset the solib inferior hook from the parent. */ -#ifdef SOLIB_REMOVE_INFERIOR_HOOK - SOLIB_REMOVE_INFERIOR_HOOK (PIDGET (inferior_ptid)); -#endif - - /* Detach from the parent. */ - target_detach (NULL, 1); - - /* Attach to the child. */ - printf_unfiltered ("Attaching after fork to %s\n", - target_pid_to_str (pid_to_ptid (child_pid))); - hppa_require_attach (child_pid); - inferior_ptid = pid_to_ptid (child_pid); - - /* If we vforked, then we've also execed by now. The exec will be - reported momentarily. follow_exec () will handle breakpoints, so - we don't have to.. */ - if (!has_vforked) - follow_inferior_reset_breakpoints (); - } - - if (has_vforked) - { - /* If we followed the parent, don't try to follow the child's exec. */ - if (saved_vfork_state != STATE_GOT_PARENT - && saved_vfork_state != STATE_FAKE_EXEC) - fprintf_unfiltered (gdb_stdout, - "hppa: post follow vfork: confused state\n"); - - if (! follow_child || saved_vfork_state == STATE_GOT_PARENT) - saved_vfork_state = STATE_NONE; - else - return 1; - } - return 0; -} - -/* Format a process id, given PID. Be sure to terminate - this with a null--it's going to be printed via a "%s". */ -char * -child_pid_to_str (ptid_t ptid) -{ - /* Static because address returned */ - static char buf[30]; - pid_t pid = PIDGET (ptid); - - /* Extra NUL for paranoia's sake */ - sprintf (buf, "process %d%c", pid, '\0'); - - return buf; -} - -/* Format a thread id, given TID. Be sure to terminate - this with a null--it's going to be printed via a "%s". - - Note: This is a core-gdb tid, not the actual system tid. - See infttrace.c for details. */ -char * -hppa_tid_to_str (ptid_t ptid) -{ - /* Static because address returned */ - static char buf[30]; - /* This seems strange, but when I did the ptid conversion, it looked - as though a pid was always being passed. - Kevin Buettner */ - pid_t tid = PIDGET (ptid); - - /* Extra NULLs for paranoia's sake */ - sprintf (buf, "system thread %d%c", tid, '\0'); - - return buf; -} - -/*## */ -/* Enable HACK for ttrace work. In - * infttrace.c/require_notification_of_events, - * this is set to 0 so that the loop in child_wait - * won't loop. - */ -int not_same_real_pid = 1; -/*## */ - -/* Wait for child to do something. Return pid of child, or -1 in case - of error; store status through argument pointer OURSTATUS. */ - -ptid_t -child_wait (ptid_t ptid, struct target_waitstatus *ourstatus) -{ - int save_errno; - int status; - char *execd_pathname = NULL; - int exit_status; - int related_pid; - int syscall_id; - enum target_waitkind kind; - int pid; - - if (saved_vfork_state == STATE_FAKE_EXEC) - { - saved_vfork_state = STATE_NONE; - ourstatus->kind = TARGET_WAITKIND_EXECD; - ourstatus->value.execd_pathname = saved_child_execd_pathname; - return inferior_ptid; - } - - do - { - set_sigint_trap (); /* Causes SIGINT to be passed on to the - attached process. */ - set_sigio_trap (); - - pid = ptrace_wait (inferior_ptid, &status); - - save_errno = errno; - - clear_sigio_trap (); - - clear_sigint_trap (); - - if (pid == -1) - { - if (save_errno == EINTR) - continue; - - fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n", - safe_strerror (save_errno)); - - /* Claim it exited with unknown signal. */ - ourstatus->kind = TARGET_WAITKIND_SIGNALLED; - ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; - return pid_to_ptid (-1); - } - - /* Did it exit? - */ - if (target_has_exited (pid, status, &exit_status)) - { - /* ??rehrauer: For now, ignore this. */ - continue; - } - - if (!target_thread_alive (pid_to_ptid (pid))) - { - ourstatus->kind = TARGET_WAITKIND_SPURIOUS; - return pid_to_ptid (pid); - } - - if (hpux_has_forked (pid, &related_pid)) - { - /* Ignore the parent's fork event. */ - if (pid == PIDGET (inferior_ptid)) - { - ourstatus->kind = TARGET_WAITKIND_IGNORE; - return inferior_ptid; - } - - /* If this is the child's fork event, report that the - process has forked. */ - if (related_pid == PIDGET (inferior_ptid)) - { - ourstatus->kind = TARGET_WAITKIND_FORKED; - ourstatus->value.related_pid = pid; - return inferior_ptid; - } - } - - if (hpux_has_vforked (pid, &related_pid)) - { - if (pid == PIDGET (inferior_ptid)) - { - if (saved_vfork_state == STATE_GOT_CHILD) - saved_vfork_state = STATE_GOT_PARENT; - else if (saved_vfork_state == STATE_GOT_EXEC) - saved_vfork_state = STATE_FAKE_EXEC; - else - fprintf_unfiltered (gdb_stdout, - "hppah: parent vfork: confused\n"); - } - else if (related_pid == PIDGET (inferior_ptid)) - { - if (saved_vfork_state == STATE_NONE) - saved_vfork_state = STATE_GOT_CHILD; - else - fprintf_unfiltered (gdb_stdout, - "hppah: child vfork: confused\n"); - } - else - fprintf_unfiltered (gdb_stdout, - "hppah: unknown vfork: confused\n"); - - if (saved_vfork_state == STATE_GOT_CHILD) - { - child_post_startup_inferior (pid_to_ptid (pid)); - detach_breakpoints (pid); -#ifdef SOLIB_REMOVE_INFERIOR_HOOK - SOLIB_REMOVE_INFERIOR_HOOK (pid); -#endif - child_resume (pid_to_ptid (pid), 0, TARGET_SIGNAL_0); - ourstatus->kind = TARGET_WAITKIND_IGNORE; - return pid_to_ptid (related_pid); - } - else if (saved_vfork_state == STATE_FAKE_EXEC) - { - ourstatus->kind = TARGET_WAITKIND_VFORKED; - ourstatus->value.related_pid = related_pid; - return pid_to_ptid (pid); - } - else - { - /* We saw the parent's vfork, but we haven't seen the exec yet. - Wait for it, for simplicity's sake. It should be pending. */ - saved_vfork_pid = related_pid; - ourstatus->kind = TARGET_WAITKIND_IGNORE; - return pid_to_ptid (pid); - } - } - - if (hpux_has_execd (pid, &execd_pathname)) - { - /* On HP-UX, events associated with a vforking inferior come in - threes: a vfork event for the child (always first), followed - a vfork event for the parent and an exec event for the child. - The latter two can come in either order. Make sure we get - both. */ - if (saved_vfork_state != STATE_NONE) - { - if (saved_vfork_state == STATE_GOT_CHILD) - { - saved_vfork_state = STATE_GOT_EXEC; - /* On HP/UX with ptrace, the child must be resumed before - the parent vfork event is delivered. A single-step - suffices. */ - if (RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK ()) - target_resume (pid_to_ptid (pid), 1, TARGET_SIGNAL_0); - ourstatus->kind = TARGET_WAITKIND_IGNORE; - } - else if (saved_vfork_state == STATE_GOT_PARENT) - { - saved_vfork_state = STATE_FAKE_EXEC; - ourstatus->kind = TARGET_WAITKIND_VFORKED; - ourstatus->value.related_pid = saved_vfork_pid; - } - else - fprintf_unfiltered (gdb_stdout, - "hppa: exec: unexpected state\n"); - - saved_child_execd_pathname = execd_pathname; - - return inferior_ptid; - } - - /* Are we ignoring initial exec events? (This is likely because - we're in the process of starting up the inferior, and another - (older) mechanism handles those.) If so, we'll report this - as a regular stop, not an exec. - */ - if (inferior_ignoring_startup_exec_events) - { - inferior_ignoring_startup_exec_events--; - } - else - { - ourstatus->kind = TARGET_WAITKIND_EXECD; - ourstatus->value.execd_pathname = execd_pathname; - return pid_to_ptid (pid); - } - } - - /* All we must do with these is communicate their occurrence - to wait_for_inferior... - */ - if (hpux_has_syscall_event (pid, &kind, &syscall_id)) - { - ourstatus->kind = kind; - ourstatus->value.syscall_id = syscall_id; - return pid_to_ptid (pid); - } - - /*## } while (pid != PIDGET (inferior_ptid)); ## *//* Some other child died or stopped */ -/* hack for thread testing */ - } - while ((pid != PIDGET (inferior_ptid)) && not_same_real_pid); -/*## */ - - store_waitstatus (ourstatus, status); - return pid_to_ptid (pid); -} - -#if !defined (GDB_NATIVE_HPUX_11) - -/* The following code is a substitute for the infttrace.c versions used - with ttrace() in HPUX 11. */ - -/* This value is an arbitrary integer. */ -#define PT_VERSION 123456 - -/* This semaphore is used to coordinate the child and parent processes - after a fork(), and before an exec() by the child. See - parent_attach_all for details. */ - -typedef struct -{ - int parent_channel[2]; /* Parent "talks" to [1], child "listens" to [0] */ - int child_channel[2]; /* Child "talks" to [1], parent "listens" to [0] */ -} -startup_semaphore_t; - -#define SEM_TALK (1) -#define SEM_LISTEN (0) - -static startup_semaphore_t startup_semaphore; - -#ifdef PT_SETTRC -/* This function causes the caller's process to be traced by its - parent. This is intended to be called after GDB forks itself, - and before the child execs the target. - - Note that HP-UX ptrace is rather funky in how this is done. - If the parent wants to get the initial exec event of a child, - it must set the ptrace event mask of the child to include execs. - (The child cannot do this itself.) This must be done after the - child is forked, but before it execs. - - To coordinate the parent and child, we implement a semaphore using - pipes. After SETTRC'ing itself, the child tells the parent that - it is now traceable by the parent, and waits for the parent's - acknowledgement. The parent can then set the child's event mask, - and notify the child that it can now exec. - - (The acknowledgement by parent happens as a result of a call to - child_acknowledge_created_inferior.) */ - -int -parent_attach_all (int pid, PTRACE_ARG3_TYPE addr, int data) -{ - int pt_status = 0; - - /* We need a memory home for a constant. */ - int tc_magic_child = PT_VERSION; - int tc_magic_parent = 0; - - /* The remainder of this function is only useful for HPUX 10.0 and - later, as it depends upon the ability to request notification - of specific kinds of events by the kernel. */ -#if defined(PT_SET_EVENT_MASK) - - /* Notify the parent that we're potentially ready to exec(). */ - write (startup_semaphore.child_channel[SEM_TALK], - &tc_magic_child, - sizeof (tc_magic_child)); - - /* Wait for acknowledgement from the parent. */ - read (startup_semaphore.parent_channel[SEM_LISTEN], - &tc_magic_parent, - sizeof (tc_magic_parent)); - if (tc_magic_child != tc_magic_parent) - warning ("mismatched semaphore magic"); - - /* Discard our copy of the semaphore. */ - (void) close (startup_semaphore.parent_channel[SEM_LISTEN]); - (void) close (startup_semaphore.parent_channel[SEM_TALK]); - (void) close (startup_semaphore.child_channel[SEM_LISTEN]); - (void) close (startup_semaphore.child_channel[SEM_TALK]); -#endif - - return 0; -} -#endif - -int -hppa_require_attach (int pid) -{ - int pt_status; - CORE_ADDR pc; - CORE_ADDR pc_addr; - unsigned int regs_offset; - - /* Are we already attached? There appears to be no explicit way to - answer this via ptrace, so we try something which should be - innocuous if we are attached. If that fails, then we assume - we're not attached, and so attempt to make it so. */ - - errno = 0; - regs_offset = U_REGS_OFFSET; - pc_addr = register_addr (PC_REGNUM, regs_offset); - pc = call_ptrace (PT_READ_U, pid, (PTRACE_ARG3_TYPE) pc_addr, 0); - - if (errno) - { - errno = 0; - pt_status = call_ptrace (PT_ATTACH, pid, (PTRACE_ARG3_TYPE) 0, 0); - - if (errno) - return -1; - - /* Now we really are attached. */ - errno = 0; - } - attach_flag = 1; - return pid; -} - -int -hppa_require_detach (int pid, int signal) -{ - errno = 0; - call_ptrace (PT_DETACH, pid, (PTRACE_ARG3_TYPE) 1, signal); - errno = 0; /* Ignore any errors. */ - return pid; -} - -/* Since ptrace doesn't support memory page-protection events, which - are used to implement "hardware" watchpoints on HP-UX, these are - dummy versions, which perform no useful work. */ - -void -hppa_enable_page_protection_events (int pid) -{ -} - -void -hppa_disable_page_protection_events (int pid) -{ -} - -int -hppa_insert_hw_watchpoint (int pid, CORE_ADDR start, LONGEST len, int type) -{ - error ("Hardware watchpoints not implemented on this platform."); -} - -int -hppa_remove_hw_watchpoint (int pid, CORE_ADDR start, LONGEST len, int type) -{ - error ("Hardware watchpoints not implemented on this platform."); -} - -int -hppa_can_use_hw_watchpoint (int type, int cnt, int ot) -{ - return 0; -} - -int -hppa_range_profitable_for_hw_watchpoint (int pid, CORE_ADDR start, LONGEST len) -{ - error ("Hardware watchpoints not implemented on this platform."); -} - -char * -hppa_pid_or_tid_to_str (ptid_t id) -{ - /* In the ptrace world, there are only processes. */ - return child_pid_to_str (id); -} - -void -hppa_ensure_vforking_parent_remains_stopped (int pid) -{ - /* This assumes that the vforked parent is presently stopped, and - that the vforked child has just delivered its first exec event. - Calling kill() this way will cause the SIGTRAP to be delivered as - soon as the parent is resumed, which happens as soon as the - vforked child is resumed. See wait_for_inferior for the use of - this function. */ - kill (pid, SIGTRAP); -} - -int -hppa_resume_execd_vforking_child_to_get_parent_vfork (void) -{ - return 1; /* Yes, the child must be resumed. */ -} - -void -require_notification_of_events (int pid) -{ -#if defined(PT_SET_EVENT_MASK) - int pt_status; - ptrace_event_t ptrace_events; - int nsigs; - int signum; - - /* Instruct the kernel as to the set of events we wish to be - informed of. (This support does not exist before HPUX 10.0. - We'll assume if PT_SET_EVENT_MASK has not been defined by - <sys/ptrace.h>, then we're being built on pre-10.0.) */ - memset (&ptrace_events, 0, sizeof (ptrace_events)); - - /* Note: By default, all signals are visible to us. If we wish - the kernel to keep certain signals hidden from us, we do it - by calling sigdelset (ptrace_events.pe_signals, signal) for - each such signal here, before doing PT_SET_EVENT_MASK. */ - /* RM: The above comment is no longer true. We start with ignoring - all signals, and then add the ones we are interested in. We could - do it the other way: start by looking at all signals and then - deleting the ones that we aren't interested in, except that - multiple gdb signals may be mapped to the same host signal - (eg. TARGET_SIGNAL_IO and TARGET_SIGNAL_POLL both get mapped to - signal 22 on HPUX 10.20) We want to be notified if we are - interested in either signal. */ - sigfillset (&ptrace_events.pe_signals); - - /* RM: Let's not bother with signals we don't care about */ - nsigs = (int) TARGET_SIGNAL_LAST; - for (signum = nsigs; signum > 0; signum--) - { - if ((signal_stop_state (signum)) || - (signal_print_state (signum)) || - (!signal_pass_state (signum))) - { - if (target_signal_to_host_p (signum)) - sigdelset (&ptrace_events.pe_signals, - target_signal_to_host (signum)); - } - } - - ptrace_events.pe_set_event = 0; - - ptrace_events.pe_set_event |= PTRACE_SIGNAL; - ptrace_events.pe_set_event |= PTRACE_EXEC; - ptrace_events.pe_set_event |= PTRACE_FORK; - ptrace_events.pe_set_event |= PTRACE_VFORK; - /* ??rehrauer: Add this one when we're prepared to catch it... - ptrace_events.pe_set_event |= PTRACE_EXIT; - */ - - errno = 0; - pt_status = call_ptrace (PT_SET_EVENT_MASK, - pid, - (PTRACE_ARG3_TYPE) & ptrace_events, - sizeof (ptrace_events)); - if (errno) - perror_with_name ("ptrace"); - if (pt_status < 0) - return; -#endif -} - -void -require_notification_of_exec_events (int pid) -{ -#if defined(PT_SET_EVENT_MASK) - int pt_status; - ptrace_event_t ptrace_events; - - /* Instruct the kernel as to the set of events we wish to be - informed of. (This support does not exist before HPUX 10.0. - We'll assume if PT_SET_EVENT_MASK has not been defined by - <sys/ptrace.h>, then we're being built on pre-10.0.) */ - memset (&ptrace_events, 0, sizeof (ptrace_events)); - - /* Note: By default, all signals are visible to us. If we wish - the kernel to keep certain signals hidden from us, we do it - by calling sigdelset (ptrace_events.pe_signals, signal) for - each such signal here, before doing PT_SET_EVENT_MASK. */ - sigemptyset (&ptrace_events.pe_signals); - - ptrace_events.pe_set_event = 0; - - ptrace_events.pe_set_event |= PTRACE_EXEC; - /* ??rehrauer: Add this one when we're prepared to catch it... - ptrace_events.pe_set_event |= PTRACE_EXIT; - */ - - errno = 0; - pt_status = call_ptrace (PT_SET_EVENT_MASK, - pid, - (PTRACE_ARG3_TYPE) & ptrace_events, - sizeof (ptrace_events)); - if (errno) - perror_with_name ("ptrace"); - if (pt_status < 0) - return; -#endif -} - -/* This function is called by the parent process, with pid being the - ID of the child process, after the debugger has forked. */ - -void -child_acknowledge_created_inferior (int pid) -{ - /* We need a memory home for a constant. */ - int tc_magic_parent = PT_VERSION; - int tc_magic_child = 0; - - /* The remainder of this function is only useful for HPUX 10.0 and - later, as it depends upon the ability to request notification - of specific kinds of events by the kernel. */ -#if defined(PT_SET_EVENT_MASK) - /* Wait for the child to tell us that it has forked. */ - read (startup_semaphore.child_channel[SEM_LISTEN], - &tc_magic_child, - sizeof (tc_magic_child)); - - /* Notify the child that it can exec. - - In the infttrace.c variant of this function, we set the child's - event mask after the fork but before the exec. In the ptrace - world, it seems we can't set the event mask until after the exec. */ - write (startup_semaphore.parent_channel[SEM_TALK], - &tc_magic_parent, - sizeof (tc_magic_parent)); - - /* We'd better pause a bit before trying to set the event mask, - though, to ensure that the exec has happened. We don't want to - wait() on the child, because that'll screw up the upper layers - of gdb's execution control that expect to see the exec event. - - After an exec, the child is no longer executing gdb code. Hence, - we can't have yet another synchronization via the pipes. We'll - just sleep for a second, and hope that's enough delay... */ - sleep (1); - - /* Instruct the kernel as to the set of events we wish to be - informed of. */ - require_notification_of_exec_events (pid); - - /* Discard our copy of the semaphore. */ - (void) close (startup_semaphore.parent_channel[SEM_LISTEN]); - (void) close (startup_semaphore.parent_channel[SEM_TALK]); - (void) close (startup_semaphore.child_channel[SEM_LISTEN]); - (void) close (startup_semaphore.child_channel[SEM_TALK]); -#endif -} - -void -child_post_startup_inferior (ptid_t ptid) -{ - require_notification_of_events (PIDGET (ptid)); -} - -void -child_post_attach (int pid) -{ - require_notification_of_events (pid); -} - -int -child_insert_fork_catchpoint (int pid) -{ - /* This request is only available on HPUX 10.0 and later. */ -#if !defined(PT_SET_EVENT_MASK) - error ("Unable to catch forks prior to HPUX 10.0"); -#else - /* Enable reporting of fork events from the kernel. */ - /* ??rehrauer: For the moment, we're always enabling these events, - and just ignoring them if there's no catchpoint to catch them. */ - return 0; -#endif -} - -int -child_remove_fork_catchpoint (int pid) -{ - /* This request is only available on HPUX 10.0 and later. */ -#if !defined(PT_SET_EVENT_MASK) - error ("Unable to catch forks prior to HPUX 10.0"); -#else - /* Disable reporting of fork events from the kernel. */ - /* ??rehrauer: For the moment, we're always enabling these events, - and just ignoring them if there's no catchpoint to catch them. */ - return 0; -#endif -} - -int -child_insert_vfork_catchpoint (int pid) -{ - /* This request is only available on HPUX 10.0 and later. */ -#if !defined(PT_SET_EVENT_MASK) - error ("Unable to catch vforks prior to HPUX 10.0"); -#else - /* Enable reporting of vfork events from the kernel. */ - /* ??rehrauer: For the moment, we're always enabling these events, - and just ignoring them if there's no catchpoint to catch them. */ - return 0; -#endif -} - -int -child_remove_vfork_catchpoint (int pid) -{ - /* This request is only available on HPUX 10.0 and later. */ -#if !defined(PT_SET_EVENT_MASK) - error ("Unable to catch vforks prior to HPUX 10.0"); -#else - /* Disable reporting of vfork events from the kernel. */ - /* ??rehrauer: For the moment, we're always enabling these events, - and just ignoring them if there's no catchpoint to catch them. */ - return 0; -#endif -} - -int -hpux_has_forked (int pid, int *childpid) -{ - /* This request is only available on HPUX 10.0 and later. */ -#if !defined(PT_GET_PROCESS_STATE) - *childpid = 0; - return 0; -#else - int pt_status; - ptrace_state_t ptrace_state; - - errno = 0; - pt_status = call_ptrace (PT_GET_PROCESS_STATE, - pid, - (PTRACE_ARG3_TYPE) & ptrace_state, - sizeof (ptrace_state)); - if (errno) - perror_with_name ("ptrace"); - if (pt_status < 0) - return 0; - - if (ptrace_state.pe_report_event & PTRACE_FORK) - { - *childpid = ptrace_state.pe_other_pid; - return 1; - } - - return 0; -#endif -} - -int -hpux_has_vforked (int pid, int *childpid) -{ - /* This request is only available on HPUX 10.0 and later. */ -#if !defined(PT_GET_PROCESS_STATE) - *childpid = 0; - return 0; - -#else - int pt_status; - ptrace_state_t ptrace_state; - - errno = 0; - pt_status = call_ptrace (PT_GET_PROCESS_STATE, - pid, - (PTRACE_ARG3_TYPE) & ptrace_state, - sizeof (ptrace_state)); - if (errno) - perror_with_name ("ptrace"); - if (pt_status < 0) - return 0; - - if (ptrace_state.pe_report_event & PTRACE_VFORK) - { - *childpid = ptrace_state.pe_other_pid; - return 1; - } - - return 0; -#endif -} - -int -child_insert_exec_catchpoint (int pid) -{ - /* This request is only available on HPUX 10.0 and later. */ -#if !defined(PT_SET_EVENT_MASK) - error ("Unable to catch execs prior to HPUX 10.0"); - -#else - /* Enable reporting of exec events from the kernel. */ - /* ??rehrauer: For the moment, we're always enabling these events, - and just ignoring them if there's no catchpoint to catch them. */ - return 0; -#endif -} - -int -child_remove_exec_catchpoint (int pid) -{ - /* This request is only available on HPUX 10.0 and later. */ -#if !defined(PT_SET_EVENT_MASK) - error ("Unable to catch execs prior to HPUX 10.0"); - -#else - /* Disable reporting of exec events from the kernel. */ - /* ??rehrauer: For the moment, we're always enabling these events, - and just ignoring them if there's no catchpoint to catch them. */ - return 0; -#endif -} - -int -hpux_has_execd (int pid, char **execd_pathname) -{ - /* This request is only available on HPUX 10.0 and later. */ -#if !defined(PT_GET_PROCESS_STATE) - *execd_pathname = NULL; - return 0; - -#else - int pt_status; - ptrace_state_t ptrace_state; - - errno = 0; - pt_status = call_ptrace (PT_GET_PROCESS_STATE, - pid, - (PTRACE_ARG3_TYPE) & ptrace_state, - sizeof (ptrace_state)); - if (errno) - perror_with_name ("ptrace"); - if (pt_status < 0) - return 0; - - if (ptrace_state.pe_report_event & PTRACE_EXEC) - { - char *exec_file = target_pid_to_exec_file (pid); - *execd_pathname = savestring (exec_file, strlen (exec_file)); - return 1; - } - - return 0; -#endif -} - -int -child_reported_exec_events_per_exec_call (void) -{ - return 2; /* ptrace reports the event twice per call. */ -} - -int -hpux_has_syscall_event (int pid, enum target_waitkind *kind, int *syscall_id) -{ - /* This request is only available on HPUX 10.30 and later, via - the ttrace interface. */ - - *kind = TARGET_WAITKIND_SPURIOUS; - *syscall_id = -1; - return 0; -} - -char * -child_pid_to_exec_file (int pid) -{ - static char exec_file_buffer[1024]; - int pt_status; - CORE_ADDR top_of_stack; - char four_chars[4]; - int name_index; - int i; - ptid_t saved_inferior_ptid; - int done; - -#ifdef PT_GET_PROCESS_PATHNAME - /* As of 10.x HP-UX, there's an explicit request to get the pathname. */ - pt_status = call_ptrace (PT_GET_PROCESS_PATHNAME, - pid, - (PTRACE_ARG3_TYPE) exec_file_buffer, - sizeof (exec_file_buffer) - 1); - if (pt_status == 0) - return exec_file_buffer; -#endif - - /* It appears that this request is broken prior to 10.30. - If it fails, try a really, truly amazingly gross hack - that DDE uses, of pawing through the process' data - segment to find the pathname. */ - - top_of_stack = 0x7b03a000; - name_index = 0; - done = 0; - - /* On the chance that pid != inferior_ptid, set inferior_ptid - to pid, so that (grrrr!) implicit uses of inferior_ptid get - the right id. */ - - saved_inferior_ptid = inferior_ptid; - inferior_ptid = pid_to_ptid (pid); - - /* Try to grab a null-terminated string. */ - while (!done) - { - if (target_read_memory (top_of_stack, four_chars, 4) != 0) - { - inferior_ptid = saved_inferior_ptid; - return NULL; - } - for (i = 0; i < 4; i++) - { - exec_file_buffer[name_index++] = four_chars[i]; - done = (four_chars[i] == '\0'); - if (done) - break; - } - top_of_stack += 4; - } - - if (exec_file_buffer[0] == '\0') - { - inferior_ptid = saved_inferior_ptid; - return NULL; - } - - inferior_ptid = saved_inferior_ptid; - return exec_file_buffer; -} - -void -pre_fork_inferior (void) -{ - int status; - - status = pipe (startup_semaphore.parent_channel); - if (status < 0) - { - warning ("error getting parent pipe for startup semaphore"); - return; - } - - status = pipe (startup_semaphore.child_channel); - if (status < 0) - { - warning ("error getting child pipe for startup semaphore"); - return; - } -} - - -/* Check to see if the given thread is alive. - - This is a no-op, as ptrace doesn't support threads, so we just - return "TRUE". */ - -int -child_thread_alive (ptid_t ptid) -{ - return 1; -} - -#endif /* ! GDB_NATIVE_HPUX_11 */ |