mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-25 02:53:48 +08:00
365 lines
10 KiB
C
365 lines
10 KiB
C
/* Functions specific to running gdb native on an ns32k running NetBSD
|
||
Copyright 1989, 1992, 1993, 1994, 1996, 1998, 1999, 2000, 2001
|
||
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 <sys/types.h>
|
||
#include <sys/ptrace.h>
|
||
#include <machine/reg.h>
|
||
#include <machine/frame.h>
|
||
#include <machine/pcb.h>
|
||
|
||
#include "defs.h"
|
||
#include "inferior.h"
|
||
#include "target.h"
|
||
#include "gdbcore.h"
|
||
#include "regcache.h"
|
||
|
||
#define RF(dst, src) \
|
||
memcpy(®isters[REGISTER_BYTE(dst)], &src, sizeof(src))
|
||
|
||
#define RS(src, dst) \
|
||
memcpy(&dst, ®isters[REGISTER_BYTE(src)], sizeof(dst))
|
||
|
||
void
|
||
fetch_inferior_registers (int regno)
|
||
{
|
||
struct reg inferior_registers;
|
||
struct fpreg inferior_fpregisters;
|
||
|
||
ptrace (PT_GETREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) & inferior_registers, 0);
|
||
ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
|
||
|
||
RF (R0_REGNUM + 0, inferior_registers.r_r0);
|
||
RF (R0_REGNUM + 1, inferior_registers.r_r1);
|
||
RF (R0_REGNUM + 2, inferior_registers.r_r2);
|
||
RF (R0_REGNUM + 3, inferior_registers.r_r3);
|
||
RF (R0_REGNUM + 4, inferior_registers.r_r4);
|
||
RF (R0_REGNUM + 5, inferior_registers.r_r5);
|
||
RF (R0_REGNUM + 6, inferior_registers.r_r6);
|
||
RF (R0_REGNUM + 7, inferior_registers.r_r7);
|
||
|
||
RF (SP_REGNUM, inferior_registers.r_sp);
|
||
RF (FP_REGNUM, inferior_registers.r_fp);
|
||
RF (PC_REGNUM, inferior_registers.r_pc);
|
||
RF (PS_REGNUM, inferior_registers.r_psr);
|
||
|
||
RF (FPS_REGNUM, inferior_fpregisters.r_fsr);
|
||
RF (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
|
||
RF (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
|
||
RF (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
|
||
RF (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
|
||
RF (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
|
||
RF (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
|
||
RF (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
|
||
RF (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
|
||
registers_fetched ();
|
||
}
|
||
|
||
void
|
||
store_inferior_registers (int regno)
|
||
{
|
||
struct reg inferior_registers;
|
||
struct fpreg inferior_fpregisters;
|
||
|
||
RS (R0_REGNUM + 0, inferior_registers.r_r0);
|
||
RS (R0_REGNUM + 1, inferior_registers.r_r1);
|
||
RS (R0_REGNUM + 2, inferior_registers.r_r2);
|
||
RS (R0_REGNUM + 3, inferior_registers.r_r3);
|
||
RS (R0_REGNUM + 4, inferior_registers.r_r4);
|
||
RS (R0_REGNUM + 5, inferior_registers.r_r5);
|
||
RS (R0_REGNUM + 6, inferior_registers.r_r6);
|
||
RS (R0_REGNUM + 7, inferior_registers.r_r7);
|
||
|
||
RS (SP_REGNUM, inferior_registers.r_sp);
|
||
RS (FP_REGNUM, inferior_registers.r_fp);
|
||
RS (PC_REGNUM, inferior_registers.r_pc);
|
||
RS (PS_REGNUM, inferior_registers.r_psr);
|
||
|
||
RS (FPS_REGNUM, inferior_fpregisters.r_fsr);
|
||
RS (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
|
||
RS (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
|
||
RS (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
|
||
RS (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
|
||
RS (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
|
||
RS (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
|
||
RS (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
|
||
RS (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
|
||
|
||
ptrace (PT_SETREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) & inferior_registers, 0);
|
||
ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
|
||
(PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
|
||
}
|
||
|
||
|
||
/* XXX - Add this to machine/regs.h instead? */
|
||
struct coreregs
|
||
{
|
||
struct reg intreg;
|
||
struct fpreg freg;
|
||
};
|
||
|
||
/* Get registers from a core file. REG_ADDR is unused. */
|
||
static void
|
||
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
|
||
unsigned int reg_addr)
|
||
{
|
||
struct coreregs *core_reg;
|
||
|
||
core_reg = (struct coreregs *) core_reg_sect;
|
||
|
||
/*
|
||
* We have *all* registers
|
||
* in the first core section.
|
||
* Ignore which.
|
||
*/
|
||
|
||
if (core_reg_size < sizeof (*core_reg))
|
||
{
|
||
fprintf_unfiltered (gdb_stderr, "Couldn't read regs from core file\n");
|
||
return;
|
||
}
|
||
|
||
/* Integer registers */
|
||
RF (R0_REGNUM + 0, core_reg->intreg.r_r0);
|
||
RF (R0_REGNUM + 1, core_reg->intreg.r_r1);
|
||
RF (R0_REGNUM + 2, core_reg->intreg.r_r2);
|
||
RF (R0_REGNUM + 3, core_reg->intreg.r_r3);
|
||
RF (R0_REGNUM + 4, core_reg->intreg.r_r4);
|
||
RF (R0_REGNUM + 5, core_reg->intreg.r_r5);
|
||
RF (R0_REGNUM + 6, core_reg->intreg.r_r6);
|
||
RF (R0_REGNUM + 7, core_reg->intreg.r_r7);
|
||
|
||
RF (SP_REGNUM, core_reg->intreg.r_sp);
|
||
RF (FP_REGNUM, core_reg->intreg.r_fp);
|
||
RF (PC_REGNUM, core_reg->intreg.r_pc);
|
||
RF (PS_REGNUM, core_reg->intreg.r_psr);
|
||
|
||
/* Floating point registers */
|
||
RF (FPS_REGNUM, core_reg->freg.r_fsr);
|
||
RF (FP0_REGNUM + 0, core_reg->freg.r_freg[0]);
|
||
RF (FP0_REGNUM + 2, core_reg->freg.r_freg[2]);
|
||
RF (FP0_REGNUM + 4, core_reg->freg.r_freg[4]);
|
||
RF (FP0_REGNUM + 6, core_reg->freg.r_freg[6]);
|
||
RF (LP0_REGNUM + 1, core_reg->freg.r_freg[1]);
|
||
RF (LP0_REGNUM + 3, core_reg->freg.r_freg[3]);
|
||
RF (LP0_REGNUM + 5, core_reg->freg.r_freg[5]);
|
||
RF (LP0_REGNUM + 7, core_reg->freg.r_freg[7]);
|
||
registers_fetched ();
|
||
}
|
||
|
||
/* Register that we are able to handle ns32knbsd core file formats.
|
||
FIXME: is this really bfd_target_unknown_flavour? */
|
||
|
||
static struct core_fns nat_core_fns =
|
||
{
|
||
bfd_target_unknown_flavour, /* core_flavour */
|
||
default_check_format, /* check_format */
|
||
default_core_sniffer, /* core_sniffer */
|
||
fetch_core_registers, /* core_read_registers */
|
||
NULL /* next */
|
||
};
|
||
|
||
void
|
||
_initialize_ns32knbsd_nat (void)
|
||
{
|
||
add_core_fns (&nat_core_fns);
|
||
}
|
||
|
||
|
||
/*
|
||
* kernel_u_size() is not helpful on NetBSD because
|
||
* the "u" struct is NOT in the core dump file.
|
||
*/
|
||
|
||
#ifdef FETCH_KCORE_REGISTERS
|
||
/*
|
||
* Get registers from a kernel crash dump or live kernel.
|
||
* Called by kcore-nbsd.c:get_kcore_registers().
|
||
*/
|
||
void
|
||
fetch_kcore_registers (struct pcb *pcb)
|
||
{
|
||
struct switchframe sf;
|
||
struct reg intreg;
|
||
int dummy;
|
||
|
||
/* Integer registers */
|
||
if (target_read_memory ((CORE_ADDR) pcb->pcb_ksp, (char *) &sf, sizeof sf))
|
||
error ("Cannot read integer registers.");
|
||
|
||
/* We use the psr at kernel entry */
|
||
if (target_read_memory ((CORE_ADDR) pcb->pcb_onstack, (char *) &intreg, sizeof intreg))
|
||
error ("Cannot read processor status register.");
|
||
|
||
dummy = 0;
|
||
RF (R0_REGNUM + 0, dummy);
|
||
RF (R0_REGNUM + 1, dummy);
|
||
RF (R0_REGNUM + 2, dummy);
|
||
RF (R0_REGNUM + 3, sf.sf_r3);
|
||
RF (R0_REGNUM + 4, sf.sf_r4);
|
||
RF (R0_REGNUM + 5, sf.sf_r5);
|
||
RF (R0_REGNUM + 6, sf.sf_r6);
|
||
RF (R0_REGNUM + 7, sf.sf_r7);
|
||
|
||
dummy = pcb->pcb_kfp + 8;
|
||
RF (SP_REGNUM, dummy);
|
||
RF (FP_REGNUM, sf.sf_fp);
|
||
RF (PC_REGNUM, sf.sf_pc);
|
||
RF (PS_REGNUM, intreg.r_psr);
|
||
|
||
/* Floating point registers */
|
||
RF (FPS_REGNUM, pcb->pcb_fsr);
|
||
RF (FP0_REGNUM + 0, pcb->pcb_freg[0]);
|
||
RF (FP0_REGNUM + 2, pcb->pcb_freg[2]);
|
||
RF (FP0_REGNUM + 4, pcb->pcb_freg[4]);
|
||
RF (FP0_REGNUM + 6, pcb->pcb_freg[6]);
|
||
RF (LP0_REGNUM + 1, pcb->pcb_freg[1]);
|
||
RF (LP0_REGNUM + 3, pcb->pcb_freg[3]);
|
||
RF (LP0_REGNUM + 5, pcb->pcb_freg[5]);
|
||
RF (LP0_REGNUM + 7, pcb->pcb_freg[7]);
|
||
registers_fetched ();
|
||
}
|
||
#endif /* FETCH_KCORE_REGISTERS */
|
||
|
||
void
|
||
clear_regs (void)
|
||
{
|
||
double zero = 0.0;
|
||
int null = 0;
|
||
|
||
/* Integer registers */
|
||
RF (R0_REGNUM + 0, null);
|
||
RF (R0_REGNUM + 1, null);
|
||
RF (R0_REGNUM + 2, null);
|
||
RF (R0_REGNUM + 3, null);
|
||
RF (R0_REGNUM + 4, null);
|
||
RF (R0_REGNUM + 5, null);
|
||
RF (R0_REGNUM + 6, null);
|
||
RF (R0_REGNUM + 7, null);
|
||
|
||
RF (SP_REGNUM, null);
|
||
RF (FP_REGNUM, null);
|
||
RF (PC_REGNUM, null);
|
||
RF (PS_REGNUM, null);
|
||
|
||
/* Floating point registers */
|
||
RF (FPS_REGNUM, zero);
|
||
RF (FP0_REGNUM + 0, zero);
|
||
RF (FP0_REGNUM + 2, zero);
|
||
RF (FP0_REGNUM + 4, zero);
|
||
RF (FP0_REGNUM + 6, zero);
|
||
RF (LP0_REGNUM + 0, zero);
|
||
RF (LP0_REGNUM + 1, zero);
|
||
RF (LP0_REGNUM + 2, zero);
|
||
RF (LP0_REGNUM + 3, zero);
|
||
return;
|
||
}
|
||
|
||
/* Return number of args passed to a frame.
|
||
Can return -1, meaning no way to tell. */
|
||
|
||
int
|
||
frame_num_args (struct frame_info *fi)
|
||
{
|
||
CORE_ADDR enter_addr;
|
||
CORE_ADDR argp;
|
||
int inst;
|
||
int args;
|
||
int i;
|
||
|
||
if (read_memory_integer (fi->frame, 4) == 0 && fi->pc < 0x10000)
|
||
{
|
||
/* main is always called with three args */
|
||
return (3);
|
||
}
|
||
enter_addr = ns32k_get_enter_addr (fi->pc);
|
||
if (enter_addr = 0)
|
||
return (-1);
|
||
argp = enter_addr == 1 ? SAVED_PC_AFTER_CALL (fi) : FRAME_SAVED_PC (fi);
|
||
for (i = 0; i < 16; i++)
|
||
{
|
||
/*
|
||
* After a bsr gcc may emit the following instructions
|
||
* to remove the arguments from the stack:
|
||
* cmpqd 0,tos - to remove 4 bytes from the stack
|
||
* cmpd tos,tos - to remove 8 bytes from the stack
|
||
* adjsp[bwd] -n - to remove n bytes from the stack
|
||
* Gcc sometimes delays emitting these instructions and
|
||
* may even throw a branch between our feet.
|
||
*/
|
||
inst = read_memory_integer (argp, 4);
|
||
args = read_memory_integer (argp + 2, 4);
|
||
if ((inst & 0xff) == 0xea)
|
||
{ /* br */
|
||
args = ((inst >> 8) & 0xffffff) | (args << 24);
|
||
if (args & 0x80)
|
||
{
|
||
if (args & 0x40)
|
||
{
|
||
args = ntohl (args);
|
||
}
|
||
else
|
||
{
|
||
args = ntohs (args & 0xffff);
|
||
if (args & 0x2000)
|
||
args |= 0xc000;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
args = args & 0xff;
|
||
if (args & 0x40)
|
||
args |= 0x80;
|
||
}
|
||
argp += args;
|
||
continue;
|
||
}
|
||
if ((inst & 0xffff) == 0xb81f) /* cmpqd 0,tos */
|
||
return (1);
|
||
else if ((inst & 0xffff) == 0xbdc7) /* cmpd tos,tos */
|
||
return (2);
|
||
else if ((inst & 0xfffc) == 0xa57c)
|
||
{ /* adjsp[bwd] */
|
||
switch (inst & 3)
|
||
{
|
||
case 0:
|
||
args = ((args & 0xff) + 0x80);
|
||
break;
|
||
case 1:
|
||
args = ((ntohs (args) & 0xffff) + 0x8000);
|
||
break;
|
||
case 3:
|
||
args = -ntohl (args);
|
||
break;
|
||
default:
|
||
return (-1);
|
||
}
|
||
if (args / 4 > 10 || (args & 3) != 0)
|
||
continue;
|
||
return (args / 4);
|
||
}
|
||
argp += 1;
|
||
}
|
||
return (-1);
|
||
}
|