Rename all HPPA files to fit into unique DOS filenames:

  *hppabsd*  => *hppab*       *hppahpux* => *hppah*

1 files changed, 1427 insertions, 0 deletions

diff --git a/gdb/hppah-tdep.c b/gdb/hppah-tdep.c
new file mode 100644
index 0000000..27bf9e9
--- /dev/null
+++ b/gdb/hppah-tdep.c
@@ -0,0 +1,1427 @@
+/* Machine-dependent code which would otherwise be in inflow.c and core.c,
+   for GDB, the GNU debugger.  This code is for the HP PA-RISC cpu.
+   Copyright 1986, 1987, 1989, 1990, 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "defs.h"
+#include "frame.h"
+#include "inferior.h"
+#include "value.h"
+
+/* For argument passing to the inferior */
+#include "symtab.h"
+
+#ifdef USG
+#include <sys/types.h>
+#endif
+
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+
+#ifdef COFF_ENCAPSULATE
+#include "a.out.encap.h"
+#else
+#include <a.out.h>
+#endif
+#ifndef N_SET_MAGIC
+#define N_SET_MAGIC(exec, val) ((exec).a_magic = (val))
+#endif
+
+/*#include <sys/user.h>		After a.out.h  */
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/ptrace.h>
+#include <machine/psl.h>
+
+#ifdef KERNELDEBUG
+#include <sys/vmmac.h>
+#include <machine/machparam.h>
+#include <machine/vmparam.h>
+#include <machine/pde.h>
+#include <machine/cpu.h>
+#include <machine/iomod.h>
+#include <machine/pcb.h>
+#include <machine/rpb.h>
+#include <ctype.h>
+
+extern int kernel_debugging;
+extern CORE_ADDR startup_file_start;
+extern CORE_ADDR startup_file_end;
+
+#define	KERNOFF		((unsigned)KERNBASE)
+#define	INKERNEL(x)	((x) >= KERNOFF && (x) < KERNOFF + ctob(slr))
+
+static int ok_to_cache();
+static void set_kernel_boundaries();
+
+int devmem = 0;
+int vtophys_ready = 0;
+int kerneltype;
+#define	OS_BSD	1
+#define	OS_MACH	2
+#endif
+
+#include "gdbcore.h"
+#include "gdbcmd.h"
+
+extern int errno;
+
+
+
+
+
+
+/* Last modification time of executable file.
+   Also used in source.c to compare against mtime of a source file.  */
+
+extern int exec_mtime;
+
+/* Virtual addresses of bounds of the two areas of memory in the core file.  */
+
+/* extern CORE_ADDR data_start; */
+extern CORE_ADDR data_end;
+extern CORE_ADDR stack_start;
+extern CORE_ADDR stack_end;
+
+/* Virtual addresses of bounds of two areas of memory in the exec file.
+   Note that the data area in the exec file is used only when there is no core file.  */
+
+extern CORE_ADDR text_start;
+extern CORE_ADDR text_end;
+
+extern CORE_ADDR exec_data_start;
+extern CORE_ADDR exec_data_end;
+
+/* Address in executable file of start of text area data.  */
+
+extern int text_offset;
+
+/* Address in executable file of start of data area data.  */
+
+extern int exec_data_offset;
+
+/* Address in core file of start of data area data.  */
+
+extern int data_offset;
+
+/* Address in core file of start of stack area data.  */
+
+extern int stack_offset;
+
+struct header file_hdr;
+struct som_exec_auxhdr exec_hdr;
+
+#ifdef KERNELDEBUG
+/*
+ * Kernel debugging routines.
+ */
+
+static struct pcb pcb;
+static struct pde *pdir;
+static struct hte *htbl;
+static u_int npdir, nhtbl;
+
+static CORE_ADDR
+ksym_lookup(name)
+	char *name;
+{
+	struct symbol *sym;
+	int i;
+
+	if ((i = lookup_misc_func(name)) < 0)
+		error("kernel symbol `%s' not found.", name);
+
+	return (misc_function_vector[i].address);
+}
+
+/*
+ * (re-)set the variables that tell "inside_entry_file" where to end
+ * a stack backtrace.
+ */
+void
+set_kernel_boundaries()
+{
+	switch (kerneltype) {
+	case OS_MACH:
+		startup_file_start = ksym_lookup("$syscall");
+		startup_file_end = ksym_lookup("trap");
+		break;
+	case OS_BSD:
+		startup_file_start = ksym_lookup("syscallinit");
+		startup_file_end = ksym_lookup("$syscallexit");
+		break;
+	}
+}
+
+/*
+ * return true if 'len' bytes starting at 'addr' can be read out as
+ * longwords and/or locally cached (this is mostly for memory mapped
+ * i/o register access when debugging remote kernels).
+ */
+static int
+ok_to_cache(addr, len)
+{
+	static CORE_ADDR ioptr;
+
+	if (! ioptr)
+		ioptr = ksym_lookup("ioptr");
+
+	if (addr >= ioptr && addr < SPA_HIGH)
+		return (0);
+
+	return (1);
+}
+
+static
+physrd(addr, dat, len)
+	u_int addr;
+	char *dat;
+{
+	if (lseek(corechan, addr, L_SET) == -1)
+		return (-1);
+	if (read(corechan, dat, len) != len)
+		return (-1);
+
+	return (0);
+}
+
+/*
+ * When looking at kernel data space through /dev/mem or with a core file, do
+ * virtual memory mapping.
+ */
+static CORE_ADDR
+vtophys(space, addr)
+	unsigned space;
+	CORE_ADDR addr;
+{
+	struct pde *pptr;
+	u_int hindx, vpageno, ppageno;
+	CORE_ADDR phys = ~0;
+
+	if (!vtophys_ready) {
+		phys = addr;		/* XXX for kvread */
+	} else if (kerneltype == OS_BSD) {
+		/* make offset into a virtual page no */
+		vpageno = btop(addr);
+		/*
+		 *  Determine index into hash table, initialize pptr to this
+		 *  entry (since first word of pte & hte are same), and set
+		 *  physical page number for first entry in chain.
+		 */
+		hindx = pdirhash(space, addr) & (nhtbl-1);
+		pptr = (struct pde *) &htbl[hindx];
+		ppageno = pptr->pde_next;
+		while (1) {
+			if (pptr->pde_end)
+				break;
+			pptr = &pdir[ppageno];
+			/*
+			 *  If space id & virtual page number match, return
+			 *  "next PDIR entry of previous PDIR entry" as the
+			 *  physical page or'd with offset into page.
+			 */
+			if (pptr->pde_space == space &&
+			    pptr->pde_page == vpageno) {
+				phys = (CORE_ADDR) ((u_int)ptob(ppageno) |
+						    (addr & PGOFSET));
+				break;
+			}
+			ppageno = pptr->pde_next;
+		}
+	}
+#ifdef MACHKERNELDEBUG
+	else if (kerneltype == OS_MACH) {
+	  mach_vtophys(space, addr, &phys);
+	}
+#endif
+#if 0
+	printf("vtophys(%x.%x) -> %x\n", space, addr, phys);
+#endif
+	return (phys);
+}
+
+static
+kvread(addr)
+	CORE_ADDR addr;
+{
+	CORE_ADDR paddr;
+
+	paddr = vtophys(0, addr);
+	if (paddr != ~0)
+		if (physrd(paddr, (char *)&addr, sizeof(addr)) == 0)
+			return (addr);
+
+	return (~0);
+}
+
+static void
+read_pcb(addr)
+     u_int addr;
+{
+	int i, off;
+	extern char registers[];
+	static int reg2pcb[] = {
+		/* RPB */
+		-1,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17,
+		18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
+		45, 52, 51, 75, 74, 49, 53, 54, 55, 56, -1, 70, 66, 67, 68, 69,
+		71, 72, 73, 34, 42, 43, 44, 46, 47, 58, 59, 60, -1, -1, -1, -1,
+		-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+		-1, -1, -1, -1,
+		/* BSD */
+		-1,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
+		15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
+		43, 64, 67, 68, 67, 47, 51, 52, 53, 54, -1, 35, 31, 32, 33, 34,
+		36, 37, 38, 39, 40, 41, 42, 44, 45, 56, 57, 58,102,103,104, -1,
+		70, 71, 72, 73, 74, 75, 76, 77, 78, 80, 82, 84, 86, 88, 90, 92,
+		94, 96, 98, 100,
+		/* Mach */
+		-1, -1,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13,
+		14, 15, 16, -1, -1, -1, -1, -1, -1, -1, -1, 17, -1, -1, 18, -1,
+		25, -1, -1, -1, -1, 30, -1, -1, -1, -1, -1, 20, -1, -1, -1, 19,
+		21, 22, 23, 24, 26, 27, -1, 28, 29, -1, -1, -1, -1, -1, -1, -1,
+		34, 35, 36, 37, 38, 39, 40, 41, -1, -1, -1, -1, -1, -1, -1, -1,
+		42, 44, 46, 48
+	};
+	static struct rpb *rpbaddr = (struct rpb *) 0;
+	static u_int rpbpcbaddr = 0;
+
+	if (!remote_debugging) {
+		/*
+		 * If we are debugging a post-mortem and this is the first
+		 * call of read_pcb, read the RPB.  Also assoicate the
+		 * thread/proc running at the time with the RPB.
+		 */
+		if (!devmem && rpbpcbaddr == 0) {
+			CORE_ADDR raddr = ksym_lookup("rpb");
+			int usepcb = 1;
+
+			if (raddr != ~0) {
+				rpbaddr = (struct rpb *) malloc(sizeof *rpbaddr);
+				if (!physrd(raddr, (char *)rpbaddr, sizeof *rpbaddr)) {
+					rpbpcbaddr = addr;
+					usepcb = 0;
+				}
+			}
+			if (usepcb) {
+				error("cannot read rpb, using pcb for registers\n");
+				if (rpbaddr)
+					free((char *)rpbaddr);
+				rpbpcbaddr = ~0;
+			}
+		}
+		if (physrd (addr, (char *)&pcb, sizeof pcb))
+			error ("cannot read pcb at %x.\n", addr);
+	} else {
+		if (remote_read_inferior_memory(addr, (char *)&pcb, sizeof pcb))
+			error ("cannot read pcb at %x.\n", addr);
+	}
+
+	if (kerneltype == OS_BSD) {
+		printf("p0br %lx p0lr %lx p1br %lx p1lr %lx\n",
+		       pcb.pcb_p0br, pcb.pcb_p0lr, pcb.pcb_p1br, pcb.pcb_p1lr);
+		off = NUM_REGS;
+	} else {
+		printf("pcb %lx psw %lx ksp %lx\n",
+		       addr, ((int *)&pcb)[31], ((int *)&pcb)[32]);
+		off = NUM_REGS * 2;
+	}
+	/*
+	 * get the register values out of the sys pcb and
+	 * store them where `read_register' will find them.
+	 */
+	bzero(registers, REGISTER_BYTES);
+	for (i = 0; i < NUM_REGS; ++i)
+		if (reg2pcb[i+off] != -1)
+			supply_register(i, &((int *)&pcb)[reg2pcb[i+off]]);
+	/*
+	 * If the RPB is valid for this thread/proc use the register values
+	 * contained there.
+	 */
+	if (addr == rpbpcbaddr) {
+		off = 0;
+		for (i = 0; i < NUM_REGS; ++i)
+			if (reg2pcb[i+off] != -1)
+				supply_register(i, &((int *)rpbaddr)[reg2pcb[i+off]]);
+	}
+}
+
+void
+setup_kernel_debugging()
+{
+	struct stat stb;
+	CORE_ADDR addr;
+
+	fstat(corechan, &stb);
+	devmem = 0;
+	if ((stb.st_mode & S_IFMT) == S_IFCHR && stb.st_rdev == makedev(2, 0))
+		devmem = 1;
+
+	/* XXX */
+	if (lookup_misc_func("Sysmap") < 0)
+		kerneltype = OS_MACH;
+	else
+		kerneltype = OS_BSD;
+
+	if (kerneltype == OS_BSD) {
+		int len, err = 0;
+
+		/*
+		 * Hash table and PDIR are equivalently mapped
+		 */
+		nhtbl = kvread(ksym_lookup("nhtbl"));
+		if (nhtbl != ~0) {
+			len = nhtbl * sizeof(*htbl);
+			htbl = (struct hte *) malloc(len);
+			if (htbl) {
+				addr = kvread(ksym_lookup("htbl"));
+				if (physrd(addr, (char *)htbl, len))
+					err++;
+			} else
+				err++;
+		} else
+			err++;
+		npdir = kvread(ksym_lookup("npdir"));
+		if (npdir != ~0) {
+			len = npdir * sizeof(*pdir);
+			pdir = (struct pde *) malloc(len);
+			if (pdir) {
+				addr = kvread(ksym_lookup("pdir"));
+				if (physrd(addr, (char *)pdir, len))
+					err++;
+			} else
+				err++;
+		} else
+			err++;
+		if (err) {
+			error("cannot read PDIR/HTBL");
+			return;
+		}
+		vtophys_ready = 1;
+
+		/*
+		 * pcb where "panic" saved registers in first thing in
+		 * current u-area.  The current u-area is pointed to by
+		 * "uptr".
+		 */
+		addr = kvread(ksym_lookup("uptr"));
+		if (addr == ~0) {
+			error("cannot read current u-area address");
+			return;
+		}
+		read_pcb(vtophys(0, addr));	/* XXX space */
+		if (!devmem) {
+			/* find stack frame */
+			CORE_ADDR panicstr;
+			char buf[256];
+			register char *cp;
+			
+			panicstr = kvread(ksym_lookup("panicstr"));
+			if (panicstr == ~0)
+				return;
+			kernel_core_file_hook(panicstr, buf, sizeof(buf));
+			for (cp = buf; cp < &buf[sizeof(buf)] && *cp; cp++)
+				if (!isascii(*cp) || (!isprint(*cp) && !isspace(*cp)))
+					*cp = '?';
+			if (*cp)
+				*cp = '\0';
+			printf("panic: %s\n", buf);
+		}
+	}
+#ifdef MACHKERNELDEBUG
+	else {
+		int *thread;
+
+		/*
+		 * Set up address translation
+		 */
+		if (mach_vtophys_init() == 0) {
+			error("cannot initialize vtophys for Mach");
+			return;
+		}
+		vtophys_ready = 1;
+
+		/*
+		 * Locate active thread and read PCB
+		 * XXX MAJOR HACK
+		 *	- assumes uni-processor
+		 *	- assumes position of pcb to avoid mach includes
+		 */
+		thread = (int *)kvread(ksym_lookup("active_threads"));
+		addr = kvread(&thread[9]);		/* XXX: pcb addr */
+		read_pcb(vtophys(0, addr));
+	}
+#endif
+}
+
+vtop_command(arg)
+	char *arg;
+{
+	u_int sp, off, pa;
+
+	if (!arg)
+		error_no_arg("kernel virtual address");
+	if (!kernel_debugging)
+		error("not debugging kernel");
+
+	sp = 0;		/* XXX */
+	off = (u_int) parse_and_eval_address(arg);
+	pa = vtophys(sp, off);
+	printf("%lx.%lx -> ", sp, off);
+	if (pa == ~0)
+		printf("<invalid>\n");
+	else
+		printf("%lx\n", pa);
+}
+
+set_paddr_command(arg)
+	char *arg;
+{
+	u_int addr;
+
+	if (!arg) {
+		if (kerneltype == OS_BSD)
+			error_no_arg("ps-style address for new process");
+		else
+			error_no_arg("thread structure virtual address");
+	}
+	if (!kernel_debugging)
+		error("not debugging kernel");
+
+	addr = (u_int) parse_and_eval_address(arg);
+	if (kerneltype == OS_BSD)
+		addr = ctob(addr);
+	else {
+		addr = kvread(&(((int *)addr)[9]));	/* XXX: pcb addr */
+		addr = vtophys(0, addr);		/* XXX space */
+	}
+	read_pcb(addr);
+
+	flush_cached_frames();
+	set_current_frame(create_new_frame(read_register(FP_REGNUM), read_pc()));
+	select_frame(get_current_frame(), 0);
+}
+
+/*
+ * read len bytes from kernel virtual address 'addr' into local 
+ * buffer 'buf'.  Return 0 if read ok, 1 otherwise.  On read
+ * errors, portion of buffer not read is zeroed.
+ */
+kernel_core_file_hook(addr, buf, len)
+	CORE_ADDR addr;
+	char *buf;
+	int len;
+{
+	int i;
+	CORE_ADDR paddr;
+
+	while (len > 0) {
+		paddr = vtophys(0, addr);	/* XXX space */
+		if (paddr == ~0) {
+			bzero(buf, len);
+			return (1);
+		}
+		/* we can't read across a page boundary */
+		i = min(len, NBPG - (addr & PGOFSET));
+		if (physrd(paddr, buf, i)) {
+			bzero(buf, len);
+			return (1);
+		}
+		buf += i;
+		addr += i;
+		len -= i;
+	}
+	return (0);
+}
+#endif
+
+
+
+
+
+
+/* Routines to extract various sized constants out of hppa 
+   instructions. */
+
+/* This assumes that no garbage lies outside of the lower bits of 
+   value. */
+
+int
+sign_extend (val, bits)
+     unsigned val, bits;
+{
+  return (int)(val >> bits - 1 ? (-1 << bits) | val : val);
+}
+
+/* For many immediate values the sign bit is the low bit! */
+
+int
+low_sign_extend (val, bits)
+     unsigned val, bits;
+{
+  return (int)((val & 0x1 ? (-1 << (bits - 1)) : 0) | val >> 1);
+}
+/* extract the immediate field from a ld{bhw}s instruction */
+
+
+
+unsigned
+get_field (val, from, to)
+     unsigned val, from, to;
+{
+  val = val >> 31 - to;
+  return val & ((1 << 32 - from) - 1);
+}
+
+unsigned
+set_field (val, from, to, new_val)
+     unsigned *val, from, to;
+{
+  unsigned mask = ~((1 << (to - from + 1)) << (31 - from));
+  return *val = *val & mask | (new_val << (31 - from));
+}
+
+/* extract a 3-bit space register number from a be, ble, mtsp or mfsp */
+
+extract_3 (word)
+     unsigned word;
+{
+  return GET_FIELD (word, 18, 18) << 2 | GET_FIELD (word, 16, 17);
+}
+       
+extract_5_load (word)
+     unsigned word;
+{
+  return low_sign_extend (word >> 16 & MASK_5, 5);
+}
+
+/* extract the immediate field from a st{bhw}s instruction */
+
+int
+extract_5_store (word)
+     unsigned word;
+{
+  return low_sign_extend (word & MASK_5, 5);
+}
+
+/* extract an 11 bit immediate field */
+
+int
+extract_11 (word)
+     unsigned word;
+{
+  return low_sign_extend (word & MASK_11, 11);
+}
+
+/* extract a 14 bit immediate field */
+
+int
+extract_14 (word)
+     unsigned word;
+{
+  return low_sign_extend (word & MASK_14, 14);
+}
+
+/* deposit a 14 bit constant in a word */
+
+unsigned
+deposit_14 (opnd, word)
+     int opnd;
+     unsigned word;
+{
+  unsigned sign = (opnd < 0 ? 1 : 0);
+
+  return word | ((unsigned)opnd << 1 & MASK_14)  | sign;
+}
+
+/* extract a 21 bit constant */
+
+int
+extract_21 (word)
+     unsigned word;
+{
+  int val;
+
+  word &= MASK_21;
+  word <<= 11;
+  val = GET_FIELD (word, 20, 20);
+  val <<= 11;
+  val |= GET_FIELD (word, 9, 19);
+  val <<= 2;
+  val |= GET_FIELD (word, 5, 6);
+  val <<= 5;
+  val |= GET_FIELD (word, 0, 4);
+  val <<= 2;
+  val |= GET_FIELD (word, 7, 8);
+  return sign_extend (val, 21) << 11;
+}
+
+/* deposit a 21 bit constant in a word. Although 21 bit constants are
+   usually the top 21 bits of a 32 bit constant, we assume that only
+   the low 21 bits of opnd are relevant */
+
+unsigned
+deposit_21 (opnd, word)
+     unsigned opnd, word;
+{
+  unsigned val = 0;
+
+  val |= GET_FIELD (opnd, 11 + 14, 11 + 18);
+  val <<= 2;
+  val |= GET_FIELD (opnd, 11 + 12, 11 + 13);
+  val <<= 2;
+  val |= GET_FIELD (opnd, 11 + 19, 11 + 20);
+  val <<= 11;
+  val |= GET_FIELD (opnd, 11 + 1, 11 + 11);
+  val <<= 1;
+  val |= GET_FIELD (opnd, 11 + 0, 11 + 0);
+  return word | val;
+}
+
+/* extract a 12 bit constant from branch instructions */
+
+int
+extract_12 (word)
+     unsigned word;
+{
+  return sign_extend (GET_FIELD (word, 19, 28) |
+		      GET_FIELD (word, 29, 29) << 10 |
+		      (word & 0x1) << 11, 12) << 2;
+}
+
+/* extract a 17 bit constant from branch instructions, returning the
+   19 bit signed value. */
+
+int
+extract_17 (word)
+     unsigned word;
+{
+  return sign_extend (GET_FIELD (word, 19, 28) |
+		      GET_FIELD (word, 29, 29) << 10 |
+		      GET_FIELD (word, 11, 15) << 11 |
+		      (word & 0x1) << 16, 17) << 2;
+}
+
+
+CORE_ADDR
+frame_saved_pc (frame)
+     FRAME frame;
+{
+  if (get_current_frame () == frame)
+    {
+      struct frame_saved_regs saved_regs;
+      CORE_ADDR pc = get_frame_pc (frame);
+
+      get_frame_saved_regs (frame, &saved_regs);
+      if (pc >= millicode_start && pc < millicode_end)
+	return read_register (31);
+      else if (saved_regs.regs[RP_REGNUM])
+	return read_memory_integer (saved_regs.regs[RP_REGNUM], 4);
+      else
+	return read_register (RP_REGNUM);
+    }
+  return read_memory_integer (frame->frame - 20, 4) & ~0x3;
+}
+
+
+/* To see if a frame chain is valid, see if the caller looks like it
+   was compiled with gcc. */
+
+int frame_chain_valid (chain, thisframe)
+     FRAME_ADDR chain;
+     FRAME thisframe;
+{
+  if (chain && (chain > 0x60000000 
+		/* || remote_debugging   -this is no longer used */
+#ifdef KERNELDEBUG
+		|| kernel_debugging
+#endif
+		))
+    {
+      CORE_ADDR pc = get_pc_function_start (FRAME_SAVED_PC (thisframe));
+
+      if (!inside_entry_file (pc))
+	return 0;
+      /* look for stw rp, -20(0,sp); copy 4,1; copy sp, 4 */
+      if (read_memory_integer (pc, 4) == 0x6BC23FD9)			
+	pc = pc + 4;							
+      
+      if (read_memory_integer (pc, 4) == 0x8040241 &&
+	  read_memory_integer (pc + 4, 4) == 0x81E0244)			
+	return 1;
+      else
+	return 0;
+    }
+  else
+    return 0;
+}
+
+/* Some helper functions. gcc_p returns 1 if the function beginning at 
+   pc appears to have been compiled with gcc. hpux_cc_p returns 1 if
+   fn was compiled with hpux cc. gcc functions look like :
+
+   stw     rp,-0x14(sp) ; optional
+   or      r4,r0,r1
+   or      sp,r0,r4
+   stwm    r1,framesize(sp)
+
+   hpux cc functions look like:
+
+   stw     rp,-0x14(sp) ; optional.
+   stwm    r3,framesiz(sp)
+   */
+
+gcc_p (pc)
+     CORE_ADDR pc;
+{
+  if (read_memory_integer (pc, 4) == 0x6BC23FD9)			
+    pc = pc + 4;							
+      
+  if (read_memory_integer (pc, 4) == 0x8040241 &&
+      read_memory_integer (pc + 4, 4) == 0x81E0244)			
+    return 1;
+  return 0;
+}
+
+  
+find_dummy_frame_regs (frame, frame_saved_regs)
+     struct frame_info *frame;
+     struct frame_saved_regs *frame_saved_regs;
+{
+  CORE_ADDR fp = frame->frame;
+  int i;
+  
+  frame_saved_regs->regs[RP_REGNUM] = fp - 20 & ~0x3;
+  frame_saved_regs->regs[FP_REGNUM] = fp;
+  frame_saved_regs->regs[1] = fp + 8;
+  frame_saved_regs->regs[3] = fp + 12;
+  for (fp += 16, i = 3; i < 30; fp += 4, i++)
+    frame_saved_regs->regs[i] = fp;
+  frame_saved_regs->regs[31] = fp;
+  fp += 4;
+  for (i = FP0_REGNUM; i < NUM_REGS; i++, fp += 8)
+    frame_saved_regs->regs[i] = fp;
+  /* depend on last increment of fp */
+  frame_saved_regs->regs[IPSW_REGNUM] = fp - 4;
+  frame_saved_regs->regs[SAR_REGNUM] = fp;
+  fp += 4;
+  frame_saved_regs->regs[PCOQ_TAIL_REGNUM] = fp;
+  frame_saved_regs->regs[PCSQ_TAIL_REGNUM] = fp;
+}
+
+CORE_ADDR
+hp_push_arguments (nargs, args, sp, struct_return, struct_addr)
+     int nargs;
+     value *args;
+     CORE_ADDR sp;
+     int struct_return;
+     CORE_ADDR struct_addr;
+{
+  /* array of arguments' offsets */
+  int *offset = (int *)alloca(nargs);
+  int cum = 0;
+  int i, alignment;
+  
+  for (i = 0; i < nargs; i++)
+    {
+      cum += TYPE_LENGTH (VALUE_TYPE (args[i]));
+      /* value must go at proper alignment. Assume alignment is a
+	 power of two.*/
+      alignment = hp_alignof (VALUE_TYPE (args[i]));
+      if (cum % alignment)
+	cum = (cum + alignment) & -alignment;
+      offset[i] = -cum;
+    }
+  for (i == 0; i < nargs; i++)
+    {
+      write_memory (sp + offset[i], VALUE_CONTENTS (args[i]), sizeof(int));
+    }
+  sp += min ((cum + 7) & -8, 48);
+  if (struct_return)
+    write_register (28, struct_addr);
+  return sp + 48;
+}
+
+/* return the alignment of a type in bytes. Structures have the maximum
+   alignment required by their fields. */
+
+int
+hp_alignof (arg)
+     struct type *arg;
+{
+  int max_align, align, i;
+  switch (TYPE_CODE (arg))
+    {
+    case TYPE_CODE_PTR:
+    case TYPE_CODE_INT:
+    case TYPE_CODE_FLT:
+      return TYPE_LENGTH (arg);
+    case TYPE_CODE_ARRAY:
+      return hp_alignof (TYPE_FIELD_TYPE (arg, 0));
+    case TYPE_CODE_STRUCT:
+    case TYPE_CODE_UNION:
+      max_align = 2;
+      for (i = 0; i < TYPE_NFIELDS (arg); i++)
+	{
+	  /* Bit fields have no real alignment. */
+	  if (!TYPE_FIELD_BITPOS (arg, i))
+	    {
+	      align = hp_alignof (TYPE_FIELD_TYPE (arg, i));
+	      max_align = max (max_align, align);
+	    }
+	}
+      return max_align;
+    default:
+      return 4;
+    }
+}
+
+/* Print the register regnum, or all registers if regnum is -1 */
+
+pa_do_registers_info (regnum, fpregs)
+     int regnum;
+     int fpregs;
+{
+  char raw_regs [REGISTER_BYTES];
+  int i;
+  
+  for (i = 0; i < NUM_REGS; i++)
+    read_relative_register_raw_bytes (i, raw_regs + REGISTER_BYTE (i));
+  if (regnum = -1)
+    pa_print_registers (raw_regs, regnum);
+  else if (regnum < FP0_REGNUM)
+    {
+      printf ("%s %x\n", reg_names[regnum], *(long *)(raw_regs +
+						      REGISTER_BYTE (regnum)));
+    }
+  else
+    pa_print_fp_reg (regnum);
+}
+
+pa_print_registers (raw_regs, regnum)
+     char *raw_regs;
+     int regnum;
+{
+  int i;
+
+  for (i = 0; i < 18; i++)
+    printf ("%8.8s: %8x  %8.8s: %8x  %8.8s: %8x  %8.8s: %8x\n",
+		     reg_names[i],
+		     *(int *)(raw_regs + REGISTER_BYTE (i)),
+		     reg_names[i + 18],
+		     *(int *)(raw_regs + REGISTER_BYTE (i + 18)),
+		     reg_names[i + 36],
+		     *(int *)(raw_regs + REGISTER_BYTE (i + 36)),
+		     reg_names[i + 54],
+		     *(int *)(raw_regs + REGISTER_BYTE (i + 54)));
+  for (i = 72; i < NUM_REGS; i++)
+    pa_print_fp_reg (i);
+}
+
+pa_print_fp_reg (i)
+     int i;
+{
+  unsigned char raw_buffer[MAX_REGISTER_RAW_SIZE];
+  unsigned char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
+  REGISTER_TYPE val;
+
+  /* Get the data in raw format, then convert also to virtual format.  */
+  read_relative_register_raw_bytes (i, raw_buffer);
+  REGISTER_CONVERT_TO_VIRTUAL (i, raw_buffer, virtual_buffer);
+
+  fputs_filtered (reg_names[i], stdout);
+  print_spaces_filtered (15 - strlen (reg_names[i]), stdout);
+
+  val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, stdout, 0,
+	     1, 0, Val_pretty_default);
+  printf_filtered ("\n");
+
+}
+
+/*
+ * Virtual to physical translation routines for Utah's Mach 3.0
+ */
+#ifdef MACHKERNELDEBUG
+
+#define STATIC
+
+#if 0	/* too many includes to resolve, too much crap */
+#include <kern/queue.h>
+#include <vm/pmap.h>	
+#include <mach/vm_prot.h>
+#else
+/* queue.h */
+struct queue_entry {
+	struct queue_entry	*next;		/* next element */
+	struct queue_entry	*prev;		/* previous element */
+};
+
+typedef struct queue_entry	*queue_t;
+typedef	struct queue_entry	queue_head_t;
+typedef	struct queue_entry	queue_chain_t;
+typedef	struct queue_entry	*queue_entry_t;
+
+/* pmap.h */
+#define HP800_HASHSIZE		1024
+#define HP800_HASHSIZE_LOG2	10
+
+#define pmap_hash(space, offset) \
+	(((unsigned) (space) << 5 ^ \
+	  ((unsigned) (offset) >> 19 | (unsigned) (space) << 13) ^ \
+	  (unsigned) (offset) >> 11) & (HP800_HASHSIZE-1))
+
+struct mapping {
+	queue_head_t	hash_link;	/* hash table links */
+	queue_head_t	phys_link;	/* for mappings of a given PA */
+	space_t		space;		/* virtual space */
+	unsigned	offset;		/* virtual page number */
+	unsigned	tlbpage;	/* physical page (for TLB load) */
+	unsigned	tlbprot;	/* prot/access rights (for TLB load) */
+	struct pmap	*pmap;		/* pmap mapping belongs to */
+};
+
+struct phys_entry {
+	queue_head_t	phys_link;	/* head of mappings of a given PA */
+	struct mapping	*writer;	/* mapping with R/W access */
+	unsigned	tlbprot;	/* TLB format protection */
+};
+
+#endif
+
+#define atop(a)		((unsigned)(a) >> 11)
+#define ptoa(p)		((unsigned)(p) << 11)
+#define trunc_page(a)	((unsigned)(a) & ~2047)
+
+STATIC long equiv_end;
+STATIC queue_head_t *Ovtop_table, *vtop_table, *Ofree_mapping, free_mapping;
+STATIC struct phys_entry *Ophys_table, *phys_table;
+STATIC long vm_last_phys, vm_first_phys;
+STATIC struct mapping *firstmap, *lastmap, *Omap_table, *map_table;
+STATIC unsigned Omlow, Omhigh, Omhead, Ovlow, Ovhigh, Oplow, Ophigh;
+STATIC unsigned mlow, mhigh, mhead, vlow, vhigh, plow, phigh;
+STATIC int vtopsize, physsize, mapsize;
+STATIC int kmemfd;
+
+#define IS_OVTOPPTR(p)	((unsigned)(p) >= Ovlow && (unsigned)(p) < Ovhigh)
+#define IS_OMAPPTR(p)	((unsigned)(p) >= Omlow && (unsigned)(p) < Omhigh)
+#define IS_OPHYSPTR(p)	((unsigned)(p) >= Oplow && (unsigned)(p) < Ophigh)
+#define IS_VTOPPTR(p)	((unsigned)(p) >= vlow && (unsigned)(p) < vhigh)
+#define IS_MAPPTR(p)	((unsigned)(p) >= mlow && (unsigned)(p) < mhigh)
+#define IS_PHYSPTR(p)	((unsigned)(p) >= plow && (unsigned)(p) < phigh)
+
+struct mapstate {
+	char	unused;
+	char	flags;
+	short	hashix;
+	short	physix;
+} *mapstate;
+
+/* flags */
+#define M_ISFREE	1
+#define M_ISHASH	2
+#define M_ISPHYS	4
+
+mach_vtophys_init()
+{
+	int errors = 0;
+
+	if (!readdata())
+		errors++;
+	if (!verifydata())
+		errors++;
+	if (!errors)
+		return(1);
+	fflush(stdout);
+	fprintf(stderr,
+		"translate: may not be able to translate all addresses\n");
+	return(0);
+}
+
+mach_vtophys(space, off, pa)
+	unsigned space, off, *pa;
+{
+	register int i;
+	register queue_t qp;
+	register struct mapping *mp;
+	int poff;
+
+	/*
+	 * Kernel IO or equivilently mapped, one to one.
+	 */
+	if (space == 0 && (long)off < equiv_end) {
+		*pa = off;
+		return(1);
+	}
+	/*
+	 * Else look it up in specified space
+	 */
+	poff = off - trunc_page(off);
+	off = trunc_page(off);
+	qp = &vtop_table[pmap_hash(space, off)];
+	for (mp = (struct mapping *)qp->next;
+	     qp != (queue_entry_t)mp;
+	     mp = (struct mapping *)mp->hash_link.next) {
+		if (mp->space == space && mp->offset == off) {
+			*pa = (mp->tlbpage << 7) | poff;
+			return(1);
+		}
+	}
+	return(0);
+}
+
+STATIC
+readdata()
+{
+	char *tmp, *mach_malloc();
+	long size;
+
+	/* easy scalars */
+	mach_read("equiv_end", ~0, (char *)&equiv_end, sizeof equiv_end);
+	mach_read("vm_first_phys", ~0,
+		  (char *)&vm_first_phys, sizeof vm_first_phys);
+	mach_read("vm_last_phys", ~0,
+		  (char *)&vm_last_phys, sizeof vm_last_phys);
+	mach_read("firstmap", ~0, (char *)&firstmap, sizeof firstmap);
+	mach_read("lastmap", ~0, (char *)&lastmap, sizeof lastmap);
+
+	/* virtual to physical hash table */
+	vtopsize = HP800_HASHSIZE;
+	size = vtopsize * sizeof(queue_head_t);
+	tmp = mach_malloc("vtop table", size);
+	mach_read("vtop_table", ~0, (char *)&Ovtop_table, sizeof Ovtop_table);
+	mach_read("vtop table", (CORE_ADDR)Ovtop_table, tmp, size);
+	vtop_table = (queue_head_t *) tmp;
+
+	/* inverted page table */
+	physsize = atop(vm_last_phys - vm_first_phys);
+	size = physsize * sizeof(struct phys_entry);
+	tmp = mach_malloc("phys table", size);
+	mach_read("phys_table", ~0, (char *)&Ophys_table, sizeof Ophys_table);
+	mach_read("phys table", (CORE_ADDR)Ophys_table, tmp, size);
+	phys_table = (struct phys_entry *) tmp;
+
+	/* mapping structures */
+	Ofree_mapping = (queue_head_t *) ksym_lookup("free_mapping");
+	mach_read("free mapping", (CORE_ADDR)Ofree_mapping,
+		  (char *) &free_mapping, sizeof free_mapping);
+	Omap_table = firstmap;
+	mapsize = lastmap - firstmap;
+	size = mapsize * sizeof(struct mapping);
+	tmp = mach_malloc("mapping table", size);
+	mach_read("mapping table", (CORE_ADDR)Omap_table, tmp, size);
+	map_table = (struct mapping *) tmp;
+
+	/* set limits */
+	Ovlow = (unsigned) Ovtop_table;
+	Ovhigh = (unsigned) &Ovtop_table[vtopsize];
+	Oplow = (unsigned) Ophys_table;
+	Ophigh = (unsigned) &Ophys_table[physsize];
+	Omhead = (unsigned) Ofree_mapping;
+	Omlow = (unsigned) firstmap;
+	Omhigh = (unsigned) lastmap;
+	mlow = (unsigned) map_table;
+	mhigh = (unsigned) &map_table[mapsize];
+	mhead = (unsigned) &free_mapping;
+	vlow = (unsigned) vtop_table;
+	vhigh = (unsigned) &vtop_table[vtopsize];
+	plow = (unsigned) phys_table;
+	phigh = (unsigned) &phys_table[physsize];
+
+#if 0
+	fprintf(stderr, "Ovtop [%#x-%#x) Ophys [%#x-%#x) Omap %#x [%#x-%#x)\n",
+		Ovlow, Ovhigh, Oplow, Ophigh, Omhead, Omlow, Omhigh);
+	fprintf(stderr, "vtop [%#x-%#x) phys [%#x-%#x) map %#x [%#x-%#x)\n",
+		vlow, vhigh, plow, phigh, mhead, mlow, mhigh);
+#endif
+	return(adjustdata());
+}
+
+STATIC unsigned
+ptrcvt(ptr)
+	unsigned ptr;
+{
+	unsigned ret;
+	char *str;
+
+	if (ptr == 0) {
+		ret = ptr;
+		str = "null";
+	} else if (IS_OVTOPPTR(ptr)) {
+		ret = vlow + (ptr - Ovlow);
+		str = "vtop";
+	} else if (IS_OPHYSPTR(ptr)) {
+		ret = plow + (ptr - Oplow);
+		str = "phys";
+	} else if (IS_OMAPPTR(ptr)) {
+		ret = mlow + (ptr - Omlow);
+		str = "map";
+	} else if (ptr == Omhead) {
+		ret = mhead;
+		str = "maphead";
+	} else {
+		error("bogus pointer %#x", ptr);
+		str = "wild";
+		ret = ptr;
+	}
+#if 0
+	fprintf(stderr, "%x (%s) -> %x\n", ptr, str, ret);
+#endif
+	return(ret);
+}
+
+STATIC int
+adjustdata()
+{
+	register int i, lim;
+	queue_head_t *nq;
+	struct phys_entry *np;
+	struct mapping *nm;
+
+	/* hash table */
+	lim = vtopsize;
+	for (nq = vtop_table; nq < &vtop_table[lim]; nq++) {
+		nq->next = (queue_entry_t) ptrcvt((unsigned)nq->next);
+		nq->prev = (queue_entry_t) ptrcvt((unsigned)nq->prev);
+	}
+
+	/* IPT */
+	lim = physsize;
+	for (np = phys_table; np < &phys_table[lim]; np++) {
+		np->phys_link.next = (queue_entry_t)
+			ptrcvt((unsigned)np->phys_link.next);
+		np->phys_link.prev = (queue_entry_t)
+			ptrcvt((unsigned)np->phys_link.prev);
+		np->writer = (struct mapping *) ptrcvt((unsigned)np->writer);
+	}
+
+	/* mapping table */
+	free_mapping.next = (queue_entry_t)ptrcvt((unsigned)free_mapping.next);
+	free_mapping.prev = (queue_entry_t)ptrcvt((unsigned)free_mapping.prev);
+	lim = mapsize;
+	for (nm = map_table; nm < &map_table[lim]; nm++) {
+		nm->hash_link.next = (queue_entry_t)
+			ptrcvt((unsigned)nm->hash_link.next);
+		nm->hash_link.prev = (queue_entry_t)
+			ptrcvt((unsigned)nm->hash_link.prev);
+		nm->phys_link.next = (queue_entry_t)
+			ptrcvt((unsigned)nm->phys_link.next);
+		nm->phys_link.prev = (queue_entry_t)
+			ptrcvt((unsigned)nm->phys_link.prev);
+	}
+	return(1);
+}
+
+/*
+ * Consistency checks, make sure:
+ *
+ *	1. all mappings are accounted for
+ *	2. no cycles
+ *	3. no wild pointers
+ *	4. consisent TLB state
+ */
+STATIC int
+verifydata()
+{
+	register struct mapstate *ms;
+	register int i;
+	int errors = 0;
+
+	mapstate = (struct mapstate *)
+		mach_malloc("map state", mapsize * sizeof(struct mapstate));
+	for (ms = mapstate; ms < &mapstate[mapsize]; ms++) {
+		ms->flags = 0;
+		ms->hashix = ms->physix = -2;
+	}
+
+	/*
+	 * Check the free list
+	 */
+	checkhashchain(&free_mapping, M_ISFREE, -1);
+	/*
+	 * Check every hash chain
+	 */
+	for (i = 0; i < vtopsize; i++)
+		checkhashchain(&vtop_table[i], M_ISHASH, i);
+	/*
+	 * Check every phys chain
+	 */
+	for (i = 0; i < physsize; i++)
+		checkphyschain(&phys_table[i].phys_link, M_ISPHYS, i);
+	/*
+	 * Cycle through mapstate looking for anomolies
+	 */
+	ms = mapstate;
+	for (i = 0; i < mapsize; i++) {
+		switch (ms->flags) {
+		case M_ISFREE:
+		case M_ISHASH|M_ISPHYS:
+			break;
+		case 0:
+			merror(ms, "not found");
+			errors++;
+			break;
+		case M_ISHASH:
+			merror(ms, "in vtop but not phys");
+			errors++;
+			break;
+		case M_ISPHYS:
+			merror(ms, "in phys but not vtop");
+			errors++;
+			break;
+		default:
+			merror(ms, "totally bogus");
+			errors++;
+			break;
+		}
+		ms++;
+	}
+	return(errors ? 0 : 1);
+}
+
+STATIC void
+checkhashchain(qhp, flag, ix)
+	queue_entry_t qhp;
+{
+	register queue_entry_t qp, pqp;
+	register struct mapping *mp;
+	struct mapstate *ms;
+
+	qp = qhp->next;
+	/*
+	 * First element is not a mapping structure,
+	 * chain must be empty.
+	 */
+	if (!IS_MAPPTR(qp)) {
+		if (qp != qhp || qp != qhp->prev)
+			fatal("bad vtop_table header pointer");
+	} else {
+		pqp = qhp;
+		do {
+			mp = (struct mapping *) qp;
+			qp = &mp->hash_link;
+			if (qp->prev != pqp)
+				fatal("bad hash_link prev pointer");
+			ms = &mapstate[mp-map_table];
+			ms->flags |= flag;
+			ms->hashix = ix;
+			pqp = (queue_entry_t) mp;
+			qp = qp->next;
+		} while (IS_MAPPTR(qp));
+		if (qp != qhp)
+			fatal("bad hash_link next pointer");
+	}
+}
+
+STATIC void
+checkphyschain(qhp, flag, ix)
+	queue_entry_t qhp;
+{
+	register queue_entry_t qp, pqp;
+	register struct mapping *mp;
+	struct mapstate *ms;
+
+	qp = qhp->next;
+	/*
+	 * First element is not a mapping structure,
+	 * chain must be empty.
+	 */
+	if (!IS_MAPPTR(qp)) {
+		if (qp != qhp || qp != qhp->prev)
+			fatal("bad phys_table header pointer");
+	} else {
+		pqp = qhp;
+		do {
+			mp = (struct mapping *) qp;
+			qp = &mp->phys_link;
+			if (qp->prev != pqp)
+				fatal("bad phys_link prev pointer");
+			ms = &mapstate[mp-map_table];
+			ms->flags |= flag;
+			ms->physix = ix;
+			pqp = (queue_entry_t) mp;
+			qp = qp->next;
+		} while (IS_MAPPTR(qp));
+		if (qp != qhp)
+			fatal("bad phys_link next pointer");
+	}
+}
+
+STATIC void
+merror(ms, str)
+	struct mapstate *ms;
+	char *str;
+{
+	terminal_ours();
+	fflush(stdout);
+	fprintf(stderr,
+		"vtophys: %s: %c%c%c, hashix %d, physix %d, mapping %x\n",
+		str,
+		(ms->flags & M_ISFREE) ? 'F' : '-',
+		(ms->flags & M_ISHASH) ? 'H' : '-',
+		(ms->flags & M_ISPHYS) ? 'P' : '-',
+		ms->hashix, ms->physix, &map_table[ms-mapstate]);
+	return_to_top_level();
+}
+
+STATIC int
+mach_read(str, from, top, size)
+	char *str;
+	CORE_ADDR from;
+	char *top;
+	int size;
+{
+	CORE_ADDR paddr;
+
+	if (from == ~0)
+		from = ksym_lookup(str);
+	paddr = vtophys(0, from);
+	if (paddr == ~0 || physrd(paddr, top, size) != 0)
+		fatal("cannot read %s", str);
+}
+
+STATIC char *
+mach_malloc(str, size)
+	char *str;
+	int size;
+{
+	char *ptr = (char *) malloc(size);
+
+	if (ptr == 0)
+		fatal("no memory for %s", str);
+	return(ptr);
+}
+#endif
+
+#ifdef KERNELDEBUG
+void
+_initialize_hp9k8_dep()
+{
+	add_com ("process-address", class_obscure, set_paddr_command,
+"The process identified by (ps-style) ADDR becomes the\n\
+\"current\" process context for kernel debugging.");
+	add_com_alias ("paddr", "process-address", class_obscure, 0);
+	add_com ("virtual-to-physical", class_obscure, vtop_command,
+"Translates the kernel virtual address ADDR into a physical address.");
+	add_com_alias ("vtop", "virtual-to-physical", class_obscure, 0);
+}
+#endif