first cut on binutils/gcc support for hppa-*-openbsd*; tested on i386 host

8 files changed, 444 insertions, 0 deletions

diff --git a/gnu/usr.bin/binutils/gdb/config/pa/hppaelf.mh b/gnu/usr.bin/binutils/gdb/config/pa/hppaelf.mh
new file mode 100644
index 00000000000..fd6bfb35e79
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/config/pa/hppaelf.mh
@@ -0,0 +1,7 @@
+# Host: Hewlett-Packard PA-RISC machine, running BSD w/ elf
+XDEPFILES=  ser-tcp.o
+XM_FILE= xm-hppab.h
+NAT_FILE= nm-hppab.h
+NATDEPFILES= hppab-nat.o corelow.o core-elf.o inftarg.o fork-child.o somread.o infptrace.o hpread.o somsolib.o
+
+GDBSERVER_DEPFILES= low-hppaelf.o
diff --git a/gnu/usr.bin/binutils/gdb/config/pa/hppaelf.mt b/gnu/usr.bin/binutils/gdb/config/pa/hppaelf.mt
new file mode 100644
index 00000000000..33b30cb1c65
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/config/pa/hppaelf.mt
@@ -0,0 +1,3 @@
+# Target: HP PA-RISC running bsd
+TDEPFILES= hppa-tdep.o remote-pa.o
+TM_FILE= tm-hppab.h
diff --git a/gnu/usr.bin/binutils/gdb/config/pa/nm-obsd.h b/gnu/usr.bin/binutils/gdb/config/pa/nm-obsd.h
new file mode 100644
index 00000000000..b31ab5c9bb7
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/config/pa/nm-obsd.h
@@ -0,0 +1,135 @@
+/* HP PA-RISC machine native support for BSD, for GDB.
+   Copyright 1991, 1992 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.  */
+
+#include "somsolib.h"
+
+#define U_REGS_OFFSET 0
+
+#define KERNEL_U_ADDR 0
+
+/* What a coincidence! */
+#define REGISTER_U_ADDR(addr, blockend, regno)				\
+{ addr = (int)(blockend) + REGISTER_BYTE (regno);}
+
+/* 3rd argument to ptrace is supposed to be a caddr_t.  */
+
+#define	PTRACE_ARG3_TYPE caddr_t
+
+/* HPUX 8.0, in its infinite wisdom, has chosen to prototype ptrace
+   with five arguments, so programs written for normal ptrace lose.  */
+#define FIVE_ARG_PTRACE
+
+
+/* This macro defines the register numbers (from REGISTER_NAMES) that
+   are effectively unavailable to the user through ptrace().  It allows
+   us to include the whole register set in REGISTER_NAMES (inorder to
+   better support remote debugging).  If it is used in
+   fetch/store_inferior_registers() gdb will not complain about I/O errors
+   on fetching these registers.  If all registers in REGISTER_NAMES
+   are available, then return false (0).  */
+
+#define CANNOT_STORE_REGISTER(regno)            \
+                   ((regno) == 0) ||     \
+                   ((regno) == PCSQ_HEAD_REGNUM) || \
+                   ((regno) >= PCSQ_TAIL_REGNUM && (regno) < IPSW_REGNUM) ||  \
+                   ((regno) > IPSW_REGNUM && (regno) < FP4_REGNUM)
+
+/* fetch_inferior_registers is in hppab-nat.c.  */
+#define FETCH_INFERIOR_REGISTERS
+
+/* attach/detach works to some extent under BSD and HPUX.  So long
+   as the process you're attaching to isn't blocked waiting on io,
+   blocked waiting on a signal, or in a system call things work 
+   fine.  (The problems in those cases are related to the fact that
+   the kernel can't provide complete register information for the
+   target process...  Which really pisses off GDB.)  */
+
+#define ATTACH_DETACH
+
+/* The PA-BSD kernel has support for using the data memory break bit
+   to implement fast watchpoints.
+
+   Watchpoints on the PA act much like traditional page protection
+   schemes, but with some notable differences.
+
+   First, a special bit in the page table entry is used to cause
+   a trap when a specific page is written to.  This avoids having
+   to overload watchpoints on the page protection bits.  This makes
+   it possible for the kernel to easily decide if a trap was caused
+   by a watchpoint or by the user writing to protected memory and can
+   signal the user program differently in each case.  
+   
+   Second, the PA has a bit in the processor status word which causes
+   data memory breakpoints (aka watchpoints) to be disabled for a single
+   instruction.  This bit can be used to avoid the overhead of unprotecting
+   and reprotecting pages when it becomes necessary to step over a watchpoint.
+
+
+   When the kernel receives a trap indicating a write to a page which
+   is being watched, the kernel performs a couple of simple actions.  First
+   is sets the magic "disable memory breakpoint" bit in the processor
+   status word, it then sends a SIGTRAP to the process which caused the
+   trap.
+
+   GDB will take control and catch the signal for the inferior.  GDB then
+   examines the PSW-X bit to determine if the SIGTRAP was caused by a 
+   watchpoint firing.  If so GDB single steps the inferior over the
+   instruction which caused the watchpoint to trigger (note because the
+   kernel disabled the data memory break bit for one instruction no trap
+   will be taken!).  GDB will then determines the appropriate action to
+   take.  (this may include restarting the inferior if the watchpoint
+   fired because of a write to an address on the same page as a watchpoint,
+   but no write to the watched address occured).  */
+
+#define TARGET_HAS_HARDWARE_WATCHPOINTS	/* Enable the code in procfs.c */
+
+/* The PA can watch any number of locations, there's no need for it to reject
+   anything (generic routines already check that all intermediates are
+   in memory).  */
+#define TARGET_CAN_USE_HARDWARE_WATCHPOINT(type, cnt, ot) \
+	((type) == bp_hardware_watchpoint)
+
+/* When a hardware watchpoint fires off the PC will be left at the
+   instruction which caused the watchpoint.  It will be necessary for
+   GDB to step over the watchpoint.
+
+   On a PA running BSD, it is trivial to identify when it will be
+   necessary to step over a hardware watchpoint as we can examine
+   the PSW-X bit.  If the bit is on, then we trapped because of a 
+   watchpoint, else we trapped for some other reason.  */
+#define STOPPED_BY_WATCHPOINT(W) \
+  ((W).kind == TARGET_WAITKIND_STOPPED \
+   && (W).value.sig == TARGET_SIGNAL_TRAP \
+   && ((int) read_register (IPSW_REGNUM) & 0x00100000))
+
+/* The PA can single step over a watchpoint if the kernel has set the
+   "X" bit in the processor status word (disable data memory breakpoint
+   for one instruction).
+
+   The kernel will always set this bit before notifying the inferior
+   that it hit a watchpoint.  Thus, the inferior can single step over
+   the instruction which caused the watchpoint to fire.  This avoids
+   the traditional need to disable the watchpoint, step the inferior,
+   then enable the watchpoint again.  */
+#define HAVE_STEPPABLE_WATCHPOINT
+
+/* Use these macros for watchpoint insertion/deletion.  */
+/* type can be 0: write watch, 1: read watch, 2: access watch (read/write) */
+#define target_insert_watchpoint(addr, len, type) hppa_set_watchpoint (addr, len, 1)
+#define target_remove_watchpoint(addr, len, type) hppa_set_watchpoint (addr, len, 0)
diff --git a/gnu/usr.bin/binutils/gdb/config/pa/tm-hppaobsd.h b/gnu/usr.bin/binutils/gdb/config/pa/tm-hppaobsd.h
new file mode 100644
index 00000000000..87697f48e5d
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/config/pa/tm-hppaobsd.h
@@ -0,0 +1,49 @@
+/* Parameters for execution on an HP PA-RISC machine running BSD, for GDB.
+   Contributed by the Center for Software Science at the
+   University of Utah (pa-gdb-bugs@cs.utah.edu).  */
+
+/* For BSD:
+
+   The signal context structure pointer is always saved at the base
+   of the frame + 0x4.
+
+   We get the PC & SP directly from the sigcontext structure itself.
+   For other registers we have to dive in a little deeper: 
+
+   The hardware save state pointer is at offset 0x10 within the 
+   signal context structure.
+
+   Within the hardware save state, registers are found in the same order
+   as the register numbers in GDB. */
+
+#define FRAME_SAVED_PC_IN_SIGTRAMP(FRAME, TMP) \
+{ \
+  *(TMP) = read_memory_integer ((FRAME)->frame + 0x4, 4); \
+  *(TMP) = read_memory_integer (*(TMP) + 0x18, 4); \
+}
+
+#define FRAME_BASE_BEFORE_SIGTRAMP(FRAME, TMP) \
+{ \
+  *(TMP) = read_memory_integer ((FRAME)->frame + 0x4, 4); \
+  *(TMP) = read_memory_integer (*(TMP) + 0x8, 4); \
+}
+
+#define FRAME_FIND_SAVED_REGS_IN_SIGTRAMP(FRAME, FSR) \
+{ \
+  int i; \
+  CORE_ADDR TMP; \
+  TMP = read_memory_integer ((FRAME)->frame + 0x4, 4); \
+  TMP = read_memory_integer (TMP + 0x10, 4); \
+  for (i = 0; i < NUM_REGS; i++) \
+    { \
+      if (i == SP_REGNUM) \
+	(FSR)->regs[SP_REGNUM] = read_memory_integer (TMP + SP_REGNUM * 4, 4); \
+      else \
+	(FSR)->regs[i] = TMP + i * 4; \
+    } \
+}
+
+/* It's mostly just the common stuff.  */
+#include "pa/tm-hppa.h"
+
+#define	GDB_TARGET_IS_PA_ELF
diff --git a/gnu/usr.bin/binutils/gdb/config/pa/xm-hppaobsd.h b/gnu/usr.bin/binutils/gdb/config/pa/xm-hppaobsd.h
new file mode 100644
index 00000000000..463c1e08dcb
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/config/pa/xm-hppaobsd.h
@@ -0,0 +1,33 @@
+/* Parameters for hosting on an HPPA PA-RISC machine, running BSD, for GDB.
+   Copyright 1991, 1992 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.  */
+
+/* This is a big-endian host.  */
+
+#define	HOST_BYTE_ORDER	BIG_ENDIAN
+
+#include "pa/xm-pa.h"
+
+#ifndef SEEK_SET
+#  define SEEK_SET    0		/* Set file pointer to "offset" */
+#  define SEEK_CUR    1		/* Set file pointer to current plus "offset" */
+#  define SEEK_END    2		/* Set file pointer to EOF plus "offset" */
+#endif /* SEEK_SET */
diff --git a/gnu/usr.bin/binutils/gdb/configure.host b/gnu/usr.bin/binutils/gdb/configure.host
index cb6ff7b1f31..af18d910db0 100644
--- a/gnu/usr.bin/binutils/gdb/configure.host
+++ b/gnu/usr.bin/binutils/gdb/configure.host
@@ -44,6 +44,7 @@ hppa*-*-bsd*)		gdb_host=hppabsd ;;
 hppa*-*-hiux*)		gdb_host=hppahpux ;;
 hppa*-*-hpux*)		gdb_host=hppahpux ;;
 hppa*-*-osf*)		gdb_host=hppaosf ;;
+hppa*-*-openbsd*)	gdb_host=obsd ;;
 
 i[3456]86-ncr-*)	gdb_host=ncr3000 ;;
 i[3456]86-sequent-bsd*)	gdb_host=symmetry ;;  # dynix
diff --git a/gnu/usr.bin/binutils/gdb/configure.tgt b/gnu/usr.bin/binutils/gdb/configure.tgt
index 0717726aa92..721d4ecda4d 100644
--- a/gnu/usr.bin/binutils/gdb/configure.tgt
+++ b/gnu/usr.bin/binutils/gdb/configure.tgt
@@ -63,6 +63,7 @@ hppa*-*-pro*)		gdb_target=hppapro ;;
 hppa*-*-hpux*)		gdb_target=hppahpux ;;
 hppa*-*-hiux*)		gdb_target=hppahpux ;;
 hppa*-*-osf*)		gdb_target=hppaosf ;;
+hppa*-*-openbsd*)	gdb_target=obsd ;;
 
 i[3456]86-sequent-bsd*)	gdb_target=symmetry ;;
 i[3456]86-sequent-sysv4*) gdb_target=ptx4 ;;
diff --git a/gnu/usr.bin/binutils/gdb/hppaobsd-nat.c b/gnu/usr.bin/binutils/gdb/hppaobsd-nat.c
new file mode 100644
index 00000000000..57360f3fd64
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/hppaobsd-nat.c
@@ -0,0 +1,215 @@
+/* Machine-dependent hooks for the unix child process stratum.  This
+   code is for the HP PA-RISC cpu.
+
+   Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993 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>
+
+/* Use an extra level of indirection for ptrace calls.
+   This lets us breakpoint usefully on call_ptrace.   It also
+   allows us to pass an extra argument to ptrace without
+   using an ANSI-C specific macro.  */
+
+#define ptrace call_ptrace
+
+#if !defined (offsetof)
+#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
+#endif
+
+/* U_REGS_OFFSET is the offset of the registers within the u area.  */
+#if !defined (U_REGS_OFFSET)
+#define U_REGS_OFFSET \
+  ptrace (PT_READ_U, inferior_pid, \
+          (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \
+    - KERNEL_U_ADDR
+#endif
+
+/* Fetch one register.  */
+
+static void
+fetch_register (regno)
+     int regno;
+{
+  register unsigned int regaddr;
+  char buf[MAX_REGISTER_RAW_SIZE];
+  register int i;
+
+  /* Offset of registers within the u area.  */
+  unsigned int offset;
+
+  offset = U_REGS_OFFSET;
+
+  regaddr = register_addr (regno, offset);
+  for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
+    {
+      errno = 0;
+      *(int *) &buf[i] = ptrace (PT_RUREGS, inferior_pid,
+				 (PTRACE_ARG3_TYPE) regaddr, 0);
+      regaddr += sizeof (int);
+      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 register %s: %s", reg_names[regno], err);
+	  warning (msg);
+	  goto error_exit;
+	}
+    }
+  supply_register (regno, buf);
+ error_exit:;
+}
+
+/* Fetch all registers, or just one, from the child process.  */
+
+void
+fetch_inferior_registers (regno)
+     int regno;
+{
+  if (regno == -1)
+    for (regno = 0; regno < NUM_REGS; regno++)
+      fetch_register (regno);
+  else
+    fetch_register (regno);
+}
+
+/* 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 (regno)
+     int regno;
+{
+  register unsigned int regaddr;
+  char buf[80];
+  extern char registers[];
+  register int i;
+  unsigned int offset = U_REGS_OFFSET;
+  int scratch;
+
+  if (regno >= 0)
+    {
+      if (CANNOT_STORE_REGISTER (regno))
+	return;
+      regaddr = register_addr (regno, offset);
+      errno = 0;
+      if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM)
+        {
+          scratch = *(int *) &registers[REGISTER_BYTE (regno)] | 0x3;
+          ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+                  scratch);
+          if (errno != 0)
+            {
+	      /* Error, even if attached.  Failing to write these two
+		 registers is pretty serious.  */
+              sprintf (buf, "writing register number %d", regno);
+              perror_with_name (buf);
+            }
+        }
+      else
+	for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
+	  {
+	    errno = 0;
+	    ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+		    *(int *) &registers[REGISTER_BYTE (regno) + i]);
+	    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 register %s: %s",
+			 reg_names[regno], err);
+		warning (msg);
+		return;
+	      }
+	    regaddr += sizeof(int);
+	  }
+    }
+  else
+    for (regno = 0; regno < NUM_REGS; regno++)
+      store_inferior_registers (regno);
+}
+
+/* PT_PROT is specific to the PA BSD kernel and isn't documented
+   anywhere (except here).  
+
+   PT_PROT allows one to enable/disable the data memory break bit
+   for pages of memory in an inferior process.  This bit is used
+   to cause "Data memory break traps" to occur when the appropriate
+   page is written to.
+
+   The arguments are as follows:
+
+      PT_PROT -- The ptrace action to perform.
+
+      INFERIOR_PID -- The pid of the process who's page table entries
+      will be modified.
+
+      PT_ARGS -- The *address* of a 3 word block of memory which has
+      additional information:
+
+        word 0 -- The start address to watch.  This should be a page-aligned
+	address.
+
+	word 1 -- The ending address to watch.  Again, this should be a 
+	page aligned address.
+
+	word 2 -- Nonzero to enable the data memory break bit on the
+	given address range or zero to disable the data memory break
+	bit on the given address range.
+
+  This call may fail if the given addresses are not valid in the inferior
+  process.  This most often happens when restarting a program which
+  as watchpoints inserted on heap or stack memory.  */
+	
+#define PT_PROT 21
+
+int
+hppa_set_watchpoint (addr, len, flag)
+     int addr, len, flag;
+{
+  int pt_args[3];
+  pt_args[0] = addr;
+  pt_args[1] = addr + len;
+  pt_args[2] = flag;
+
+  /* Mask off the lower 12 bits since we want to work on a page basis.  */
+  pt_args[0] >>= 12; 
+  pt_args[1] >>= 12; 
+
+  /* Rounding adjustments.  */
+  pt_args[1] -= pt_args[0]; 
+  pt_args[1]++; 
+
+  /* Put the lower 12 bits back as zero.  */
+  pt_args[0] <<= 12; 
+  pt_args[1] <<= 12; 
+
+  /* Do it.  */
+  return ptrace (PT_PROT, inferior_pid, (PTRACE_ARG3_TYPE) pt_args, 0);
+}