/* Native support for HPPA-RISC machine running HPUX, for GDB.
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/* Native support for HPPA-RISC machine running HPUX, for GDB.
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Copyright 1991, 1992 Free Software Foundation, Inc.
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Copyright 1991, 1992 Free Software Foundation, Inc.
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This file is part of GDB.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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Boston, MA 02111-1307, USA. */
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#define U_REGS_OFFSET 0
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#define U_REGS_OFFSET 0
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#define KERNEL_U_ADDR 0
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#define KERNEL_U_ADDR 0
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/* What a coincidence! */
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/* What a coincidence! */
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#define REGISTER_U_ADDR(addr, blockend, regno) \
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#define REGISTER_U_ADDR(addr, blockend, regno) \
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{ addr = (int)(blockend) + REGISTER_BYTE (regno);}
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{ addr = (int)(blockend) + REGISTER_BYTE (regno);}
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/* This isn't really correct, because ptrace is actually a 32-bit
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/* This isn't really correct, because ptrace is actually a 32-bit
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interface. However, the modern HP-UX targets all really use
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interface. However, the modern HP-UX targets all really use
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ttrace, which is a 64-bit interface --- a debugger running in
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ttrace, which is a 64-bit interface --- a debugger running in
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either 32- or 64-bit mode can debug a 64-bit process. BUT, the
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either 32- or 64-bit mode can debug a 64-bit process. BUT, the
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code doesn't use ttrace directly --- it calls call_ptrace instead,
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code doesn't use ttrace directly --- it calls call_ptrace instead,
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which is supposed to be drop-in substitute for ptrace. In other
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which is supposed to be drop-in substitute for ptrace. In other
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words, they access a 64-bit system call (ttrace) through a
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words, they access a 64-bit system call (ttrace) through a
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compatibility layer which is allegedly a 32-bit interface.
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compatibility layer which is allegedly a 32-bit interface.
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So I don't feel the least bit guilty about this. */
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So I don't feel the least bit guilty about this. */
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#define PTRACE_ARG3_TYPE CORE_ADDR
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#define PTRACE_ARG3_TYPE CORE_ADDR
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/* HPUX 8.0, in its infinite wisdom, has chosen to prototype ptrace
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/* HPUX 8.0, in its infinite wisdom, has chosen to prototype ptrace
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with five arguments, so programs written for normal ptrace lose. */
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with five arguments, so programs written for normal ptrace lose. */
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#define FIVE_ARG_PTRACE
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#define FIVE_ARG_PTRACE
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/* We need to figure out where the text region is so that we use the
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/* We need to figure out where the text region is so that we use the
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appropriate ptrace operator to manipulate text. Simply reading/writing
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appropriate ptrace operator to manipulate text. Simply reading/writing
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user space will crap out HPUX. */
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user space will crap out HPUX. */
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#define NEED_TEXT_START_END 1
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#define NEED_TEXT_START_END 1
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/* This macro defines the register numbers (from REGISTER_NAMES) that
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/* This macro defines the register numbers (from REGISTER_NAMES) that
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are effectively unavailable to the user through ptrace(). It allows
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are effectively unavailable to the user through ptrace(). It allows
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us to include the whole register set in REGISTER_NAMES (inorder to
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us to include the whole register set in REGISTER_NAMES (inorder to
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better support remote debugging). If it is used in
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better support remote debugging). If it is used in
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fetch/store_inferior_registers() gdb will not complain about I/O errors
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fetch/store_inferior_registers() gdb will not complain about I/O errors
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on fetching these registers. If all registers in REGISTER_NAMES
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on fetching these registers. If all registers in REGISTER_NAMES
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are available, then return false (0). */
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are available, then return false (0). */
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#define CANNOT_STORE_REGISTER(regno) \
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#define CANNOT_STORE_REGISTER(regno) \
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((regno) == 0) || \
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((regno) == 0) || \
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((regno) == PCSQ_HEAD_REGNUM) || \
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((regno) == PCSQ_HEAD_REGNUM) || \
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((regno) >= PCSQ_TAIL_REGNUM && (regno) < IPSW_REGNUM) || \
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((regno) >= PCSQ_TAIL_REGNUM && (regno) < IPSW_REGNUM) || \
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((regno) > IPSW_REGNUM && (regno) < FP4_REGNUM)
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((regno) > IPSW_REGNUM && (regno) < FP4_REGNUM)
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/* In hppah-nat.c: */
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/* In hppah-nat.c: */
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#define FETCH_INFERIOR_REGISTERS
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#define FETCH_INFERIOR_REGISTERS
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#define CHILD_XFER_MEMORY
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#define CHILD_XFER_MEMORY
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#define CHILD_POST_FOLLOW_INFERIOR_BY_CLONE
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#define CHILD_POST_FOLLOW_INFERIOR_BY_CLONE
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#define CHILD_POST_FOLLOW_VFORK
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#define CHILD_POST_FOLLOW_VFORK
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/* While this is for use by threaded programs, it doesn't appear
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/* While this is for use by threaded programs, it doesn't appear
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* to hurt non-threaded ones. This is used in infrun.c: */
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* to hurt non-threaded ones. This is used in infrun.c: */
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#define PREPARE_TO_PROCEED(select_it) hppa_prepare_to_proceed()
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#define PREPARE_TO_PROCEED(select_it) hppa_prepare_to_proceed()
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extern int hppa_prepare_to_proceed PARAMS ((void));
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extern int hppa_prepare_to_proceed PARAMS ((void));
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/* In infptrace.c or infttrace.c: */
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/* In infptrace.c or infttrace.c: */
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#define CHILD_PID_TO_EXEC_FILE
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#define CHILD_PID_TO_EXEC_FILE
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#define CHILD_POST_STARTUP_INFERIOR
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#define CHILD_POST_STARTUP_INFERIOR
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#define CHILD_ACKNOWLEDGE_CREATED_INFERIOR
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#define CHILD_ACKNOWLEDGE_CREATED_INFERIOR
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#define CHILD_INSERT_FORK_CATCHPOINT
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#define CHILD_INSERT_FORK_CATCHPOINT
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#define CHILD_REMOVE_FORK_CATCHPOINT
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#define CHILD_REMOVE_FORK_CATCHPOINT
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#define CHILD_INSERT_VFORK_CATCHPOINT
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#define CHILD_INSERT_VFORK_CATCHPOINT
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#define CHILD_REMOVE_VFORK_CATCHPOINT
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#define CHILD_REMOVE_VFORK_CATCHPOINT
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#define CHILD_HAS_FORKED
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#define CHILD_HAS_FORKED
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#define CHILD_HAS_VFORKED
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#define CHILD_HAS_VFORKED
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#define CHILD_CAN_FOLLOW_VFORK_PRIOR_TO_EXEC
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#define CHILD_CAN_FOLLOW_VFORK_PRIOR_TO_EXEC
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#define CHILD_INSERT_EXEC_CATCHPOINT
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#define CHILD_INSERT_EXEC_CATCHPOINT
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#define CHILD_REMOVE_EXEC_CATCHPOINT
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#define CHILD_REMOVE_EXEC_CATCHPOINT
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#define CHILD_HAS_EXECD
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#define CHILD_HAS_EXECD
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#define CHILD_REPORTED_EXEC_EVENTS_PER_EXEC_CALL
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#define CHILD_REPORTED_EXEC_EVENTS_PER_EXEC_CALL
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#define CHILD_HAS_SYSCALL_EVENT
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#define CHILD_HAS_SYSCALL_EVENT
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#define CHILD_POST_ATTACH
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#define CHILD_POST_ATTACH
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#define CHILD_THREAD_ALIVE
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#define CHILD_THREAD_ALIVE
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#define CHILD_PID_TO_STR
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#define CHILD_PID_TO_STR
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#define REQUIRE_ATTACH(pid) hppa_require_attach(pid)
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#define REQUIRE_ATTACH(pid) hppa_require_attach(pid)
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extern int hppa_require_attach PARAMS ((int));
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extern int hppa_require_attach PARAMS ((int));
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#define REQUIRE_DETACH(pid,signal) hppa_require_detach(pid,signal)
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#define REQUIRE_DETACH(pid,signal) hppa_require_detach(pid,signal)
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extern int hppa_require_detach PARAMS ((int, int));
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extern int hppa_require_detach PARAMS ((int, int));
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/* So we can cleanly use code in infptrace.c. */
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/* So we can cleanly use code in infptrace.c. */
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#define PT_KILL PT_EXIT
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#define PT_KILL PT_EXIT
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#define PT_STEP PT_SINGLE
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#define PT_STEP PT_SINGLE
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#define PT_CONTINUE PT_CONTIN
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#define PT_CONTINUE PT_CONTIN
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/* FIXME HP MERGE : Previously, PT_RDUAREA. this is actually fixed
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/* FIXME HP MERGE : Previously, PT_RDUAREA. this is actually fixed
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in gdb-hp-snapshot-980509 */
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in gdb-hp-snapshot-980509 */
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#define PT_READ_U PT_RUAREA
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#define PT_READ_U PT_RUAREA
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#define PT_WRITE_U PT_WUAREA
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#define PT_WRITE_U PT_WUAREA
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#define PT_READ_I PT_RIUSER
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#define PT_READ_I PT_RIUSER
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#define PT_READ_D PT_RDUSER
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#define PT_READ_D PT_RDUSER
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#define PT_WRITE_I PT_WIUSER
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#define PT_WRITE_I PT_WIUSER
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#define PT_WRITE_D PT_WDUSER
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#define PT_WRITE_D PT_WDUSER
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/* attach/detach works to some extent under BSD and HPUX. So long
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/* attach/detach works to some extent under BSD and HPUX. So long
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as the process you're attaching to isn't blocked waiting on io,
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as the process you're attaching to isn't blocked waiting on io,
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blocked waiting on a signal, or in a system call things work
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blocked waiting on a signal, or in a system call things work
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fine. (The problems in those cases are related to the fact that
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fine. (The problems in those cases are related to the fact that
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the kernel can't provide complete register information for the
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the kernel can't provide complete register information for the
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target process... Which really pisses off GDB.) */
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target process... Which really pisses off GDB.) */
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#define ATTACH_DETACH
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#define ATTACH_DETACH
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/* In infptrace or infttrace.c: */
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/* In infptrace or infttrace.c: */
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/* Starting with HP-UX 10.30, support is provided (in the form of
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/* Starting with HP-UX 10.30, support is provided (in the form of
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ttrace requests) for memory-protection-based hardware watchpoints.
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ttrace requests) for memory-protection-based hardware watchpoints.
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The 10.30 implementation of these functions reside in infttrace.c.
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The 10.30 implementation of these functions reside in infttrace.c.
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Stubs of these functions will be provided in infptrace.c, so that
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Stubs of these functions will be provided in infptrace.c, so that
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10.20 will at least link. However, the "can I use a fast watchpoint?"
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10.20 will at least link. However, the "can I use a fast watchpoint?"
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query will always return "No" for 10.20. */
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query will always return "No" for 10.20. */
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#define TARGET_HAS_HARDWARE_WATCHPOINTS
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#define TARGET_HAS_HARDWARE_WATCHPOINTS
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/* The PA can watch any number of locations (generic routines already check
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/* The PA can watch any number of locations (generic routines already check
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that all intermediates are in watchable memory locations). */
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that all intermediates are in watchable memory locations). */
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#define TARGET_CAN_USE_HARDWARE_WATCHPOINT(type, cnt, ot) \
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#define TARGET_CAN_USE_HARDWARE_WATCHPOINT(type, cnt, ot) \
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hppa_can_use_hw_watchpoint(type, cnt, ot)
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hppa_can_use_hw_watchpoint(type, cnt, ot)
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/* The PA can also watch memory regions of arbitrary size, since we're using
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/* The PA can also watch memory regions of arbitrary size, since we're using
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a page-protection scheme. (On some targets, apparently watch registers
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a page-protection scheme. (On some targets, apparently watch registers
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are used, which can only accomodate regions of REGISTER_SIZE.) */
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are used, which can only accomodate regions of REGISTER_SIZE.) */
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#define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(byte_count) \
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#define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(byte_count) \
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(1)
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(1)
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/* However, some addresses may not be profitable to use hardware to watch,
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/* However, some addresses may not be profitable to use hardware to watch,
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or may be difficult to understand when the addressed object is out of
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or may be difficult to understand when the addressed object is out of
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scope, and hence should be unwatched. On some targets, this may have
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scope, and hence should be unwatched. On some targets, this may have
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severe performance penalties, such that we might as well use regular
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severe performance penalties, such that we might as well use regular
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watchpoints, and save (possibly precious) hardware watchpoints for other
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watchpoints, and save (possibly precious) hardware watchpoints for other
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locations.
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locations.
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On HP-UX, we choose not to watch stack-based addresses, because
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On HP-UX, we choose not to watch stack-based addresses, because
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[1] Our implementation relies on page protection traps. The granularity
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[1] Our implementation relies on page protection traps. The granularity
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of these is large and so can generate many false hits, which are expensive
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of these is large and so can generate many false hits, which are expensive
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to respond to.
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to respond to.
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[2] Watches of "*p" where we may not know the symbol that p points to,
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[2] Watches of "*p" where we may not know the symbol that p points to,
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make it difficult to know when the addressed object is out of scope, and
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make it difficult to know when the addressed object is out of scope, and
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hence shouldn't be watched. Page protection that isn't removed when the
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hence shouldn't be watched. Page protection that isn't removed when the
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addressed object is out of scope will either degrade execution speed
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addressed object is out of scope will either degrade execution speed
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(false hits) or give false triggers (when the address is recycled by
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(false hits) or give false triggers (when the address is recycled by
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other calls).
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other calls).
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Since either of these points results in a slow-running inferior, we might
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Since either of these points results in a slow-running inferior, we might
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as well use normal watchpoints, aka single-step & test. */
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as well use normal watchpoints, aka single-step & test. */
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#define TARGET_RANGE_PROFITABLE_FOR_HW_WATCHPOINT(pid,start,len) \
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#define TARGET_RANGE_PROFITABLE_FOR_HW_WATCHPOINT(pid,start,len) \
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hppa_range_profitable_for_hw_watchpoint(pid, start, (LONGEST)(len))
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hppa_range_profitable_for_hw_watchpoint(pid, start, (LONGEST)(len))
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/* On HP-UX, we're using page-protection to implement hardware watchpoints.
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/* On HP-UX, we're using page-protection to implement hardware watchpoints.
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When an instruction attempts to write to a write-protected memory page,
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When an instruction attempts to write to a write-protected memory page,
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a SIGBUS is raised. At that point, the write has not actually occurred.
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a SIGBUS is raised. At that point, the write has not actually occurred.
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We must therefore remove page-protections; single-step the inferior (to
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We must therefore remove page-protections; single-step the inferior (to
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allow the write to happen); restore page-protections; and check whether
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allow the write to happen); restore page-protections; and check whether
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any watchpoint triggered.
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any watchpoint triggered.
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If none did, then the write was to a "nearby" location that just happens
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If none did, then the write was to a "nearby" location that just happens
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to fall on the same page as a watched location, and so can be ignored.
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to fall on the same page as a watched location, and so can be ignored.
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The only intended client of this macro is wait_for_inferior(), in infrun.c.
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The only intended client of this macro is wait_for_inferior(), in infrun.c.
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When HAVE_NONSTEPPABLE_WATCHPOINT is true, that function will take care
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When HAVE_NONSTEPPABLE_WATCHPOINT is true, that function will take care
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of the stepping & etc. */
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of the stepping & etc. */
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#define STOPPED_BY_WATCHPOINT(W) \
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#define STOPPED_BY_WATCHPOINT(W) \
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((W.kind == TARGET_WAITKIND_STOPPED) && \
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((W.kind == TARGET_WAITKIND_STOPPED) && \
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(stop_signal == TARGET_SIGNAL_BUS) && \
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(stop_signal == TARGET_SIGNAL_BUS) && \
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! stepped_after_stopped_by_watchpoint && \
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! stepped_after_stopped_by_watchpoint && \
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bpstat_have_active_hw_watchpoints ())
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bpstat_have_active_hw_watchpoints ())
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/* When a hardware watchpoint triggers, we'll move the inferior past it
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/* When a hardware watchpoint triggers, we'll move the inferior past it
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by removing all eventpoints; stepping past the instruction that caused
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by removing all eventpoints; stepping past the instruction that caused
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the trigger; reinserting eventpoints; and checking whether any watched
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the trigger; reinserting eventpoints; and checking whether any watched
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location changed. */
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location changed. */
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#define HAVE_NONSTEPPABLE_WATCHPOINT
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#define HAVE_NONSTEPPABLE_WATCHPOINT
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/* Our implementation of "hardware" watchpoints uses memory page-protection
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/* Our implementation of "hardware" watchpoints uses memory page-protection
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faults. However, HP-UX has unfortunate interactions between these and
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faults. However, HP-UX has unfortunate interactions between these and
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system calls; basically, it's unsafe to have page protections on when a
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system calls; basically, it's unsafe to have page protections on when a
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syscall is running. Therefore, we also ask for notification of syscall
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syscall is running. Therefore, we also ask for notification of syscall
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entries and returns. When the inferior enters a syscall, we disable
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entries and returns. When the inferior enters a syscall, we disable
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h/w watchpoints. When the inferior returns from a syscall, we reenable
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h/w watchpoints. When the inferior returns from a syscall, we reenable
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h/w watchpoints.
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h/w watchpoints.
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infptrace.c supplies dummy versions of these; infttrace.c is where the
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infptrace.c supplies dummy versions of these; infttrace.c is where the
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meaningful implementations are.
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meaningful implementations are.
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*/
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*/
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#define TARGET_ENABLE_HW_WATCHPOINTS(pid) \
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#define TARGET_ENABLE_HW_WATCHPOINTS(pid) \
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hppa_enable_page_protection_events (pid)
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hppa_enable_page_protection_events (pid)
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extern void hppa_enable_page_protection_events PARAMS ((int));
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extern void hppa_enable_page_protection_events PARAMS ((int));
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#define TARGET_DISABLE_HW_WATCHPOINTS(pid) \
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#define TARGET_DISABLE_HW_WATCHPOINTS(pid) \
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hppa_disable_page_protection_events (pid)
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hppa_disable_page_protection_events (pid)
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extern void hppa_disable_page_protection_events PARAMS ((int));
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extern void hppa_disable_page_protection_events PARAMS ((int));
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/* Use these macros for watchpoint insertion/deletion. */
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/* Use these macros for watchpoint insertion/deletion. */
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#define target_insert_watchpoint(addr, len, type) \
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#define target_insert_watchpoint(addr, len, type) \
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hppa_insert_hw_watchpoint (inferior_pid, addr, (LONGEST)(len), type)
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hppa_insert_hw_watchpoint (inferior_pid, addr, (LONGEST)(len), type)
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#define target_remove_watchpoint(addr, len, type) \
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#define target_remove_watchpoint(addr, len, type) \
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hppa_remove_hw_watchpoint (inferior_pid, addr, (LONGEST)(len), type)
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hppa_remove_hw_watchpoint (inferior_pid, addr, (LONGEST)(len), type)
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/* We call our k-thread processes "threads", rather
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/* We call our k-thread processes "threads", rather
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* than processes. So we need a new way to print
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* than processes. So we need a new way to print
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* the string. Code is in hppah-nat.c.
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* the string. Code is in hppah-nat.c.
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*/
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*/
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extern char *child_pid_to_str PARAMS ((pid_t));
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extern char *child_pid_to_str PARAMS ((pid_t));
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#define target_tid_to_str( pid ) \
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#define target_tid_to_str( pid ) \
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hppa_tid_to_str( pid )
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hppa_tid_to_str( pid )
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extern char *hppa_tid_to_str PARAMS ((pid_t));
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extern char *hppa_tid_to_str PARAMS ((pid_t));
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/* For this, ID can be either a process or thread ID, and the function
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/* For this, ID can be either a process or thread ID, and the function
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will describe it appropriately, returning the description as a printable
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will describe it appropriately, returning the description as a printable
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string.
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string.
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The function that implements this macro is defined in infptrace.c and
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The function that implements this macro is defined in infptrace.c and
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infttrace.c.
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infttrace.c.
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*/
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*/
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#define target_pid_or_tid_to_str(ID) \
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#define target_pid_or_tid_to_str(ID) \
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hppa_pid_or_tid_to_str (ID)
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hppa_pid_or_tid_to_str (ID)
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extern char *hppa_pid_or_tid_to_str PARAMS ((pid_t));
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extern char *hppa_pid_or_tid_to_str PARAMS ((pid_t));
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/* This is used when handling events caused by a call to vfork(). On ptrace-
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/* This is used when handling events caused by a call to vfork(). On ptrace-
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based HP-UXs, when you resume the vforked child, the parent automagically
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based HP-UXs, when you resume the vforked child, the parent automagically
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begins running again. To prevent this runaway, this function is used.
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begins running again. To prevent this runaway, this function is used.
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Note that for vfork on HP-UX, we receive three events of interest:
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Note that for vfork on HP-UX, we receive three events of interest:
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1. the vfork event for the new child process
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1. the vfork event for the new child process
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2. the exit or exec event of the new child process (actually, you get
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2. the exit or exec event of the new child process (actually, you get
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two exec events on ptrace-based HP-UXs)
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two exec events on ptrace-based HP-UXs)
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3. the vfork event for the original parent process
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3. the vfork event for the original parent process
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The first is always received first. The other two may be received in any
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The first is always received first. The other two may be received in any
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order; HP-UX doesn't guarantee an order.
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order; HP-UX doesn't guarantee an order.
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*/
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*/
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#define ENSURE_VFORKING_PARENT_REMAINS_STOPPED(PID) \
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#define ENSURE_VFORKING_PARENT_REMAINS_STOPPED(PID) \
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hppa_ensure_vforking_parent_remains_stopped (PID)
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hppa_ensure_vforking_parent_remains_stopped (PID)
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extern void hppa_ensure_vforking_parent_remains_stopped PARAMS ((int));
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extern void hppa_ensure_vforking_parent_remains_stopped PARAMS ((int));
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/* This is used when handling events caused by a call to vfork().
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/* This is used when handling events caused by a call to vfork().
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On ttrace-based HP-UXs, the parent vfork and child exec arrive more or less
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On ttrace-based HP-UXs, the parent vfork and child exec arrive more or less
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together. That is, you could do two wait()s without resuming either parent
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together. That is, you could do two wait()s without resuming either parent
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or child, and get both events.
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or child, and get both events.
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|
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On ptrace-based HP-UXs, you must resume the child after its exec event is
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On ptrace-based HP-UXs, you must resume the child after its exec event is
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delivered or you won't get the parent's vfork. I.e., you can't just wait()
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delivered or you won't get the parent's vfork. I.e., you can't just wait()
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and get the parent vfork, after receiving the child exec.
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and get the parent vfork, after receiving the child exec.
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*/
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*/
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#define RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK() \
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#define RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK() \
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hppa_resume_execd_vforking_child_to_get_parent_vfork ()
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hppa_resume_execd_vforking_child_to_get_parent_vfork ()
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extern int hppa_resume_execd_vforking_child_to_get_parent_vfork PARAMS ((void));
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extern int hppa_resume_execd_vforking_child_to_get_parent_vfork PARAMS ((void));
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#define HPUXHPPA
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#define HPUXHPPA
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#define MAY_SWITCH_FROM_INFERIOR_PID (1)
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#define MAY_SWITCH_FROM_INFERIOR_PID (1)
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#define MAY_FOLLOW_EXEC (1)
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#define MAY_FOLLOW_EXEC (1)
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#define USE_THREAD_STEP_NEEDED (1)
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#define USE_THREAD_STEP_NEEDED (1)
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