820 lines
22 KiB
C
820 lines
22 KiB
C
/* Low level interface to ptrace, for GDB when running under Unix.
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Copyright (C) 1988, 1989 Free Software Foundation, Inc.
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This file is part of GDB.
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GDB 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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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GDB 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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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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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along with GDB; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include "defs.h"
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#include "param.h"
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#include "frame.h"
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#include "inferior.h"
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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/* #include <fcntl.h> Can we live without this? */
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#include <a.out.h>
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#ifndef N_SET_MAGIC
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#define N_SET_MAGIC(exec, val) ((exec).a_magic = (val))
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#endif
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#include <sys/user.h> /* After a.out.h */
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#include <sys/file.h>
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#include <sys/stat.h>
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extern int errno;
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/* This function simply calls ptrace with the given arguments.
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It exists so that all calls to ptrace are isolated in this
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machine-dependent file. */
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int
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call_ptrace (request, pid, arg3, arg4)
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int request, pid, arg3, arg4;
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{
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return ptrace (request, pid, arg3, arg4);
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}
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kill_inferior ()
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{
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if (remote_debugging)
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return;
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if (inferior_pid == 0)
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return;
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ptrace (8, inferior_pid, 0, 0);
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wait (0);
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inferior_died ();
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}
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/* This is used when GDB is exiting. It gives less chance of error.*/
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kill_inferior_fast ()
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{
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if (remote_debugging)
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return;
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if (inferior_pid == 0)
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return;
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ptrace (8, inferior_pid, 0, 0);
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wait (0);
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}
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/* Resume execution of the inferior process.
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If STEP is nonzero, single-step it.
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If SIGNAL is nonzero, give it that signal. */
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void
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resume (step, signal)
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int step;
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int signal;
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{
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errno = 0;
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if (remote_debugging)
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remote_resume (step, signal);
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else
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{
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ptrace (step ? 9 : 7, inferior_pid, 1, signal);
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if (errno)
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perror_with_name ("ptrace");
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}
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}
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void
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fetch_inferior_registers ()
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{
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register int regno, datum;
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register unsigned int regaddr;
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int reg_buf[NUM_REGS+1];
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struct user u;
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register int skipped_frames = 0;
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if (remote_debugging)
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remote_fetch_registers ();
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else
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{
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for (regno = 0; regno < 64; regno++) {
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reg_buf[regno] = ptrace (3, inferior_pid, regno, 0);
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#if defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
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printf ("Fetching %s from inferior, got %0x\n",
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reg_names[regno],
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reg_buf[regno]);
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#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
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if (reg_buf[regno] == -1 && errno == EIO) {
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printf("fetch_interior_registers: fetching %s from inferior\n",
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reg_names[regno]);
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errno = 0;
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}
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supply_register (regno, reg_buf+regno);
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}
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/* that leaves regs 64, 65, and 66 */
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datum = ptrace (3, inferior_pid,
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((char *)&u.u_pcb.pcb_csp) -
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((char *)&u), 0);
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/* FIXME: Find the Current Frame Pointer (CFP). CFP is a global
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register (ie, NOT windowed), that gets saved in a frame iff
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the code for that frame has a prologue (ie, "adsf N"). If
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there is a prologue, the adsf insn saves the old cfp in
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pr13, cfp is set to sp, and N bytes of locals are allocated
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(sp is decremented by n).
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This makes finding CFP hard. I guess the right way to do it
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is:
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- If this is the innermost frame, believe ptrace() or
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the core area.
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- Otherwise:
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Find the first insn of the current frame.
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- find the saved pc;
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- find the call insn that saved it;
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- figure out where the call is to;
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- if the first insn is an adsf, we got a frame
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pointer. */
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/* Normal processors have separate stack pointers for user and
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kernel mode. Getting the last user mode frame on such
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machines is easy: the kernel context of the ptrace()'d
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process is on the kernel stack, and the USP points to what
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we want. But Pyramids only have a single cfp for both user and
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kernel mode. And processes being ptrace()'d have some
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kernel-context control frames on their stack.
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To avoid tracing back into the kernel context of an inferior,
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we skip 0 or more contiguous control frames where the pc is
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in the kernel. */
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while (1) {
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register int inferior_saved_pc;
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inferior_saved_pc = ptrace (1, inferior_pid, datum+((32+15)*4), 0);
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if (inferior_saved_pc > 0) break;
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#if defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
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printf("skipping kernel frame %08x, pc=%08x\n", datum,
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inferior_saved_pc);
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#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
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skipped_frames++;
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datum -= CONTROL_STACK_FRAME_SIZE;
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}
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reg_buf[CSP_REGNUM] = datum;
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supply_register(CSP_REGNUM, reg_buf+CSP_REGNUM);
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#ifdef PYRAMID_CONTROL_FRAME_DEBUGGING
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if (skipped_frames) {
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fprintf (stderr,
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"skipped %d frames from %x to %x; cfp was %x, now %x\n",
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skipped_frames, reg_buf[CSP_REGNUM]);
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}
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#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
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}
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}
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/* Store our register values back into the inferior.
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If REGNO is -1, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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store_inferior_registers (regno)
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int regno;
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{
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register unsigned int regaddr;
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char buf[80];
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if (regno >= 0)
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{
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if ((0 <= regno) && (regno < 64)) {
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/*regaddr = register_addr (regno, offset);*/
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regaddr = regno;
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errno = 0;
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ptrace (6, inferior_pid, regaddr, read_register (regno));
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if (errno != 0)
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{
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sprintf (buf, "writing register number %d", regno);
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perror_with_name (buf);
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}
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}
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}
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else for (regno = 0; regno < NUM_REGS; regno++)
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{
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/*regaddr = register_addr (regno, offset);*/
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regaddr = regno;
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errno = 0;
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ptrace (6, inferior_pid, regaddr, read_register (regno));
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if (errno != 0)
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{
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sprintf (buf, "writing all regs, number %d", regno);
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perror_with_name (buf);
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}
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}
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}
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/* Copy LEN bytes from inferior's memory starting at MEMADDR
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to debugger memory starting at MYADDR.
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On failure (cannot read from inferior, usually because address is out
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of bounds) returns the value of errno. */
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int
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read_inferior_memory (memaddr, myaddr, len)
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CORE_ADDR memaddr;
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char *myaddr;
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int len;
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{
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register int i;
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/* Round starting address down to longword boundary. */
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register CORE_ADDR addr = memaddr & - sizeof (int);
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/* Round ending address up; get number of longwords that makes. */
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register int count
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= (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
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/* Allocate buffer of that many longwords. */
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register int *buffer = (int *) alloca (count * sizeof (int));
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extern int errno;
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/* Read all the longwords */
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for (i = 0; i < count; i++, addr += sizeof (int))
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{
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errno = 0;
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#if 0
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/*This is now done by read_memory, because when this function did it,
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reading a byte or short int hardware port read whole longs, causing
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serious side effects
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such as bus errors and unexpected hardware operation. This would
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also be a problem with ptrace if the inferior process could read
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or write hardware registers, but that's not usually the case. */
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if (remote_debugging)
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buffer[i] = remote_fetch_word (addr);
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else
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#endif
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buffer[i] = ptrace (1, inferior_pid, addr, 0);
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if (errno)
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return errno;
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}
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/* Copy appropriate bytes out of the buffer. */
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bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
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return 0;
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}
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/* Copy LEN bytes of data from debugger memory at MYADDR
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to inferior's memory at MEMADDR.
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On failure (cannot write the inferior)
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returns the value of errno. */
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int
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write_inferior_memory (memaddr, myaddr, len)
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CORE_ADDR memaddr;
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char *myaddr;
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int len;
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{
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register int i;
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/* Round starting address down to longword boundary. */
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register CORE_ADDR addr = memaddr & - sizeof (int);
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/* Round ending address up; get number of longwords that makes. */
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register int count
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= (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
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/* Allocate buffer of that many longwords. */
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register int *buffer = (int *) alloca (count * sizeof (int));
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extern int errno;
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/* Fill start and end extra bytes of buffer with existing memory data. */
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if (remote_debugging)
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buffer[0] = remote_fetch_word (addr);
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else
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buffer[0] = ptrace (1, inferior_pid, addr, 0);
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if (count > 1)
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{
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if (remote_debugging)
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buffer[count - 1]
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= remote_fetch_word (addr + (count - 1) * sizeof (int));
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else
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buffer[count - 1]
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= ptrace (1, inferior_pid,
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addr + (count - 1) * sizeof (int), 0);
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}
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/* Copy data to be written over corresponding part of buffer */
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bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
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/* Write the entire buffer. */
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for (i = 0; i < count; i++, addr += sizeof (int))
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{
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errno = 0;
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if (remote_debugging)
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remote_store_word (addr, buffer[i]);
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else
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ptrace (4, inferior_pid, addr, buffer[i]);
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if (errno)
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return errno;
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}
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return 0;
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}
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/*** Extensions to core and dump files, for GDB. */
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extern unsigned int last_frame_offset;
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#ifdef PYRAMID_CORE
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/* Can't make definitions here static, since core.c needs them
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to do bounds checking on the core-file areas. O well. */
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/* have two stacks: one for data, one for register windows. */
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extern CORE_ADDR reg_stack_start;
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extern CORE_ADDR reg_stack_end;
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/* need this so we can find the global registers: they never get saved. */
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static CORE_ADDR global_reg_offset;
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static CORE_ADDR last_frame_address;
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static CORE_ADDR last_frame_offset;
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/* Address in core file of start of register window stack area.
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Don't know if is this any of meaningful, useful or necessary. */
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static CORE_ADDR reg_stack_offset;
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#endif /* PYRAMID_CORE */
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/* Work with core dump and executable files, for GDB.
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This code would be in core.c if it weren't machine-dependent. */
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#ifndef N_TXTADDR
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#define N_TXTADDR(hdr) 0
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#endif /* no N_TXTADDR */
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#ifndef N_DATADDR
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#define N_DATADDR(hdr) hdr.a_text
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#endif /* no N_DATADDR */
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/* Make COFF and non-COFF names for things a little more compatible
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to reduce conditionals later. */
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#ifdef COFF_FORMAT
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#define a_magic magic
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#endif
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#ifndef COFF_FORMAT
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#ifndef AOUTHDR
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#define AOUTHDR struct exec
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#endif
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#endif
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extern char *sys_siglist[];
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/* Hook for `exec_file_command' command to call. */
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extern void (*exec_file_display_hook) ();
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/* File names of core file and executable file. */
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extern char *corefile;
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extern char *execfile;
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/* Descriptors on which core file and executable file are open.
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Note that the execchan is closed when an inferior is created
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and reopened if the inferior dies or is killed. */
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extern int corechan;
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extern int execchan;
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/* Last modification time of executable file.
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Also used in source.c to compare against mtime of a source file. */
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extern int exec_mtime;
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/* Virtual addresses of bounds of the two areas of memory in the core file. */
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extern CORE_ADDR data_start;
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extern CORE_ADDR data_end;
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extern CORE_ADDR stack_start;
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extern CORE_ADDR stack_end;
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#ifdef PYRAMID_CORE
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/* Well, "two areas of memory" on most machines; but pyramids have a
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third area, for the register-window stack, and we need its
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base and bound too. */
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extern CORE_ADDR reg_stack_start;
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extern CORE_ADDR reg_stack_start;
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#endif /* PYRAMID_CORE */
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/* Virtual addresses of bounds of two areas of memory in the exec file.
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Note that the data area in the exec file is used only when there is no core file. */
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extern CORE_ADDR text_start;
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extern CORE_ADDR text_end;
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extern CORE_ADDR exec_data_start;
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extern CORE_ADDR exec_data_end;
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/* Address in executable file of start of text area data. */
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extern int text_offset;
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/* Address in executable file of start of data area data. */
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extern int exec_data_offset;
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/* Address in core file of start of data area data. */
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extern int data_offset;
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/* Address in core file of start of stack area data. */
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extern int stack_offset;
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#ifdef COFF_FORMAT
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/* various coff data structures */
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extern FILHDR file_hdr;
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extern SCNHDR text_hdr;
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extern SCNHDR data_hdr;
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#endif /* not COFF_FORMAT */
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/* a.out header saved in core file. */
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extern AOUTHDR core_aouthdr;
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/* a.out header of exec file. */
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extern AOUTHDR exec_aouthdr;
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extern void validate_files ();
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core_file_command (filename, from_tty)
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char *filename;
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int from_tty;
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{
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int val;
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extern char registers[];
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/* Discard all vestiges of any previous core file
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and mark data and stack spaces as empty. */
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if (corefile)
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free (corefile);
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corefile = 0;
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if (corechan >= 0)
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close (corechan);
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corechan = -1;
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data_start = 0;
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data_end = 0;
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stack_start = STACK_END_ADDR;
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stack_end = STACK_END_ADDR;
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#ifdef PYRAMID_CORE
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reg_stack_start = CONTROL_STACK_ADDR;
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reg_stack_end = CONTROL_STACK_ADDR; /* this isn't strictly true...*/
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#endif /* PYRAMID_CORE */
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/* Now, if a new core file was specified, open it and digest it. */
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if (filename)
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{
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filename = tilde_expand (filename);
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make_cleanup (free, filename);
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if (have_inferior_p ())
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error ("To look at a core file, you must kill the inferior with \"kill\".");
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corechan = open (filename, O_RDONLY, 0);
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if (corechan < 0)
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perror_with_name (filename);
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/* 4.2-style (and perhaps also sysV-style) core dump file. */
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{
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struct user u;
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unsigned int reg_offset;
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val = myread (corechan, &u, sizeof u);
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if (val < 0)
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perror_with_name ("Not a core file: reading upage");
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if (val != sizeof u)
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error ("Not a core file: could only read %d bytes", val);
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data_start = exec_data_start;
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data_end = data_start + NBPG * u.u_dsize;
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data_offset = NBPG * UPAGES;
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stack_offset = NBPG * (UPAGES + u.u_dsize);
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/* find registers in core file */
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#ifdef PYRAMID_PTRACE
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stack_start = stack_end - NBPG * u.u_ussize;
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reg_stack_offset = stack_offset + (NBPG *u.u_ussize);
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reg_stack_end = reg_stack_start + NBPG * u.u_cssize;
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last_frame_address = ((int) u.u_pcb.pcb_csp);
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last_frame_offset = reg_stack_offset + last_frame_address
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- CONTROL_STACK_ADDR ;
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global_reg_offset = (char *)&u - (char *)&u.u_pcb.pcb_gr0 ;
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/* skip any control-stack frames that were executed in the
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kernel. */
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while (1) {
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char buf[4];
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val = lseek (corechan, last_frame_offset+(47*4), 0);
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if (val < 0)
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perror_with_name (filename);
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val = myread (corechan, buf, sizeof buf);
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if (val < 0)
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perror_with_name (filename);
|
||
|
||
if (*(int *)buf >= 0)
|
||
break;
|
||
printf ("skipping frame %0x\n", last_frame_address);
|
||
last_frame_offset -= CONTROL_STACK_FRAME_SIZE;
|
||
last_frame_address -= CONTROL_STACK_FRAME_SIZE;
|
||
}
|
||
reg_offset = last_frame_offset;
|
||
|
||
#if 1 || defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
|
||
printf ("Control stack pointer = 0x%08x\n",
|
||
u.u_pcb.pcb_csp);
|
||
printf ("offset to control stack %d outermost frame %d (%0x)\n",
|
||
reg_stack_offset, reg_offset, last_frame_address);
|
||
#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
|
||
|
||
#else /* not PYRAMID_CORE */
|
||
stack_start = stack_end - NBPG * u.u_ssize;
|
||
reg_offset = (int) u.u_ar0 - KERNEL_U_ADDR;
|
||
#endif /* not PYRAMID_CORE */
|
||
|
||
#ifdef __not_on_pyr_yet
|
||
/* Some machines put an absolute address in here and some put
|
||
the offset in the upage of the regs. */
|
||
reg_offset = (int) u.u_ar0;
|
||
if (reg_offset > NBPG * UPAGES)
|
||
reg_offset -= KERNEL_U_ADDR;
|
||
#endif
|
||
|
||
/* I don't know where to find this info.
|
||
So, for now, mark it as not available. */
|
||
N_SET_MAGIC (core_aouthdr, 0);
|
||
|
||
/* Read the register values out of the core file and store
|
||
them where `read_register' will find them. */
|
||
|
||
{
|
||
register int regno;
|
||
|
||
for (regno = 0; regno < 64; regno++)
|
||
{
|
||
char buf[MAX_REGISTER_RAW_SIZE];
|
||
|
||
val = lseek (corechan, register_addr (regno, reg_offset), 0);
|
||
if (val < 0
|
||
|| (val = myread (corechan, buf, sizeof buf)) < 0)
|
||
{
|
||
char * buffer = (char *) alloca (strlen (reg_names[regno])
|
||
+ 30);
|
||
strcpy (buffer, "Reading register ");
|
||
strcat (buffer, reg_names[regno]);
|
||
|
||
perror_with_name (buffer);
|
||
}
|
||
|
||
if (val < 0)
|
||
perror_with_name (filename);
|
||
#ifdef PYRAMID_CONTROL_FRAME_DEBUGGING
|
||
printf ("[reg %s(%d), offset in file %s=0x%0x, addr =0x%0x, =%0x]\n",
|
||
reg_names[regno], regno, filename,
|
||
register_addr(regno, reg_offset),
|
||
regno * 4 + last_frame_address,
|
||
*((int *)buf));
|
||
#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
|
||
supply_register (regno, buf);
|
||
}
|
||
}
|
||
}
|
||
if (filename[0] == '/')
|
||
corefile = savestring (filename, strlen (filename));
|
||
else
|
||
{
|
||
corefile = concat (current_directory, "/", filename);
|
||
}
|
||
|
||
#if 1 || defined(PYRAMID_CONTROL_FRAME_DEBUGGING)
|
||
printf ("Providing CSP (%0x) as nominal address of current frame.\n",
|
||
last_frame_address);
|
||
#endif PYRAMID_CONTROL_FRAME_DEBUGGING
|
||
/* FIXME: Which of the following is correct? */
|
||
#if 0
|
||
set_current_frame ( create_new_frame (read_register (FP_REGNUM),
|
||
read_pc ()));
|
||
#else
|
||
set_current_frame ( create_new_frame (last_frame_address,
|
||
read_pc ()));
|
||
#endif
|
||
|
||
select_frame (get_current_frame (), 0);
|
||
validate_files ();
|
||
}
|
||
else if (from_tty)
|
||
printf ("No core file now.\n");
|
||
}
|
||
|
||
exec_file_command (filename, from_tty)
|
||
char *filename;
|
||
int from_tty;
|
||
{
|
||
int val;
|
||
|
||
/* Eliminate all traces of old exec file.
|
||
Mark text segment as empty. */
|
||
|
||
if (execfile)
|
||
free (execfile);
|
||
execfile = 0;
|
||
data_start = 0;
|
||
data_end -= exec_data_start;
|
||
text_start = 0;
|
||
text_end = 0;
|
||
exec_data_start = 0;
|
||
exec_data_end = 0;
|
||
if (execchan >= 0)
|
||
close (execchan);
|
||
execchan = -1;
|
||
|
||
/* Now open and digest the file the user requested, if any. */
|
||
|
||
if (filename)
|
||
{
|
||
filename = tilde_expand (filename);
|
||
make_cleanup (free, filename);
|
||
|
||
execchan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
|
||
&execfile);
|
||
if (execchan < 0)
|
||
perror_with_name (filename);
|
||
|
||
#ifdef COFF_FORMAT
|
||
#else /* not COFF_FORMAT */
|
||
{
|
||
struct stat st_exec;
|
||
|
||
#ifdef gould
|
||
#endif /* gould */
|
||
val = myread (execchan, &exec_aouthdr, sizeof (AOUTHDR));
|
||
|
||
if (val < 0)
|
||
perror_with_name (filename);
|
||
|
||
text_start = N_TXTADDR (exec_aouthdr);
|
||
exec_data_start = N_DATADDR (exec_aouthdr);
|
||
#ifdef gould
|
||
#else
|
||
text_offset = N_TXTOFF (exec_aouthdr);
|
||
exec_data_offset = N_TXTOFF (exec_aouthdr) + exec_aouthdr.a_text;
|
||
#endif
|
||
text_end = text_start + exec_aouthdr.a_text;
|
||
exec_data_end = exec_data_start + exec_aouthdr.a_data;
|
||
data_start = exec_data_start;
|
||
data_end += exec_data_start;
|
||
|
||
fstat (execchan, &st_exec);
|
||
exec_mtime = st_exec.st_mtime;
|
||
}
|
||
#endif /* not COFF_FORMAT */
|
||
|
||
validate_files ();
|
||
}
|
||
else if (from_tty)
|
||
printf ("No exec file now.\n");
|
||
|
||
/* Tell display code (if any) about the changed file name. */
|
||
if (exec_file_display_hook)
|
||
(*exec_file_display_hook) (filename);
|
||
}
|
||
|
||
/*** Prettier register printing. ***/
|
||
|
||
/* Print registers in the same format as pyramid's dbx, adb, sdb. */
|
||
pyr_print_registers(reg_buf, regnum)
|
||
long *reg_buf[];
|
||
{
|
||
register int regno;
|
||
int usp, ksp;
|
||
struct user u;
|
||
|
||
for (regno = 0; regno < 16; regno++) {
|
||
printf/*_filtered*/ ("%6.6s: %8x %6.6s: %8x %6s: %8x %6s: %8x\n",
|
||
reg_names[regno], reg_buf[regno],
|
||
reg_names[regno+16], reg_buf[regno+16],
|
||
reg_names[regno+32], reg_buf[regno+32],
|
||
reg_names[regno+48], reg_buf[regno+48]);
|
||
}
|
||
usp = ptrace (3, inferior_pid,
|
||
((char *)&u.u_pcb.pcb_usp) -
|
||
((char *)&u), 0);
|
||
ksp = ptrace (3, inferior_pid,
|
||
((char *)&u.u_pcb.pcb_ksp) -
|
||
((char *)&u), 0);
|
||
printf/*_filtered*/ ("\n%6.6s: %8x %6.6s: %8x (%08x) %6.6s %8x\n",
|
||
reg_names[CSP_REGNUM],reg_buf[CSP_REGNUM],
|
||
reg_names[KSP_REGNUM], reg_buf[KSP_REGNUM], ksp,
|
||
"usp", usp);
|
||
}
|
||
|
||
/* Print the register regnum, or all registers if regnum is -1. */
|
||
|
||
pyr_do_registers_info (regnum)
|
||
int regnum;
|
||
{
|
||
/* On a pyr, we know a virtual register can always fit in an long.
|
||
Here (and elsewhere) we take advantage of that. Yuk. */
|
||
long raw_regs[MAX_REGISTER_RAW_SIZE*NUM_REGS];
|
||
register int i;
|
||
|
||
for (i = 0 ; i < 64 ; i++) {
|
||
read_relative_register_raw_bytes(i, raw_regs+i);
|
||
}
|
||
if (regnum == -1)
|
||
pyr_print_registers (raw_regs, regnum);
|
||
else
|
||
for (i = 0; i < NUM_REGS; i++)
|
||
if (i == regnum) {
|
||
long val = raw_regs[i];
|
||
|
||
fputs_filtered (reg_names[i], stdout);
|
||
printf_filtered(":");
|
||
print_spaces_filtered (6 - strlen (reg_names[i]), stdout);
|
||
if (val == 0)
|
||
printf_filtered ("0");
|
||
else
|
||
printf_filtered ("0x%08x %d", val, val);
|
||
printf_filtered("\n");
|
||
}
|
||
}
|
||
|
||
/*** Debugging editions of various macros from m-pyr.h ****/
|
||
|
||
CORE_ADDR frame_locals_address (frame)
|
||
FRAME frame;
|
||
{
|
||
register int addr = find_saved_register (frame,CFP_REGNUM);
|
||
register int result = read_memory_integer (addr, 4);
|
||
#ifdef PYRAMID_CONTROL_FRAME_DEBUGGING
|
||
fprintf (stderr,
|
||
"\t[[..frame_locals:%8x, %s= %x @%x fcfp= %x foo= %x\n\t gr13=%x pr13=%x tr13=%x @%x]]\n",
|
||
frame->frame,
|
||
reg_names[CFP_REGNUM],
|
||
result, addr,
|
||
frame->frame_cfp, (CFP_REGNUM),
|
||
|
||
|
||
read_register(13), read_register(29), read_register(61),
|
||
find_saved_register(frame, 61));
|
||
#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
|
||
|
||
/* FIXME: I thought read_register (CFP_REGNUM) should be the right answer;
|
||
or at least CFP_REGNUM relative to FRAME (ie, result).
|
||
There seems to be a bug in the way the innermost frame is set up. */
|
||
|
||
return ((frame->next) ? result: frame->frame_cfp);
|
||
}
|
||
|
||
CORE_ADDR frame_args_addr (frame)
|
||
FRAME frame;
|
||
{
|
||
register int addr = find_saved_register (frame,CFP_REGNUM);
|
||
register int result = read_memory_integer (addr, 4);
|
||
|
||
#ifdef PYRAMID_CONTROL_FRAME_DEBUGGING
|
||
fprintf (stderr,
|
||
"\t[[..frame_args:%8x, %s= %x @%x fcfp= %x r_r= %x\n\t gr13=%x pr13=%x tr13=%x @%x]]\n",
|
||
frame->frame,
|
||
reg_names[CFP_REGNUM],
|
||
result, addr,
|
||
frame->frame_cfp, read_register(CFP_REGNUM),
|
||
|
||
read_register(13), read_register(29), read_register(61),
|
||
find_saved_register(frame, 61));
|
||
#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */
|
||
|
||
/* FIXME: I thought read_register (CFP_REGNUM) should be the right answer;
|
||
or at least CFP_REGNUM relative to FRAME (ie, result).
|
||
There seems to be a bug in the way the innermost frame is set up. */
|
||
return ((frame->next) ? result: frame->frame_cfp);
|
||
}
|