mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
262 lines
6.7 KiB
C
262 lines
6.7 KiB
C
/* Native-dependent code for GNU/Linux m32r.
|
||
|
||
Copyright (C) 2004-2014 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 3 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, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#include "defs.h"
|
||
#include "inferior.h"
|
||
#include "gdbcore.h"
|
||
#include "regcache.h"
|
||
#include "linux-nat.h"
|
||
#include "target.h"
|
||
|
||
#include "gdb_assert.h"
|
||
#include <string.h>
|
||
#include <sys/ptrace.h>
|
||
#include <sys/user.h>
|
||
#include <sys/procfs.h>
|
||
|
||
/* Prototypes for supply_gregset etc. */
|
||
#include "gregset.h"
|
||
|
||
#include "m32r-tdep.h"
|
||
|
||
|
||
|
||
|
||
/* Since EVB register is not available for native debug, we reduce
|
||
the number of registers. */
|
||
#define M32R_LINUX_NUM_REGS (M32R_NUM_REGS - 1)
|
||
|
||
/* Mapping between the general-purpose registers in `struct user'
|
||
format and GDB's register array layout. */
|
||
static int regmap[] = {
|
||
4, 5, 6, 7, 0, 1, 2, 8,
|
||
9, 10, 11, 12, 13, 24, 25, 23,
|
||
19, 19, 26, 23, 22, 20, 16, 15
|
||
};
|
||
|
||
#define PSW_REGMAP 19
|
||
#define BBPSW_REGMAP 21
|
||
#define SPU_REGMAP 23
|
||
#define SPI_REGMAP 26
|
||
|
||
/* Doee (??) apply to the corresponding SET requests as well. */
|
||
#define GETREGS_SUPPLIES(regno) (0 <= (regno) \
|
||
&& (regno) <= M32R_LINUX_NUM_REGS)
|
||
|
||
|
||
|
||
/* Transfering the general-purpose registers between GDB, inferiors
|
||
and core files. */
|
||
|
||
/* Fill GDB's register array with the general-purpose register values
|
||
in *GREGSETP. */
|
||
|
||
void
|
||
supply_gregset (struct regcache *regcache, const elf_gregset_t * gregsetp)
|
||
{
|
||
const elf_greg_t *regp = (const elf_greg_t *) gregsetp;
|
||
int i;
|
||
unsigned long psw, bbpsw;
|
||
|
||
psw = *(regp + PSW_REGMAP);
|
||
bbpsw = *(regp + BBPSW_REGMAP);
|
||
|
||
for (i = 0; i < M32R_LINUX_NUM_REGS; i++)
|
||
{
|
||
elf_greg_t regval;
|
||
|
||
switch (i)
|
||
{
|
||
case PSW_REGNUM:
|
||
regval = ((0x00c1 & bbpsw) << 8) | ((0xc100 & psw) >> 8);
|
||
break;
|
||
case CBR_REGNUM:
|
||
regval = ((psw >> 8) & 1);
|
||
break;
|
||
default:
|
||
regval = *(regp + regmap[i]);
|
||
break;
|
||
}
|
||
|
||
if (i != M32R_SP_REGNUM)
|
||
regcache_raw_supply (regcache, i, ®val);
|
||
else if (psw & 0x8000)
|
||
regcache_raw_supply (regcache, i, regp + SPU_REGMAP);
|
||
else
|
||
regcache_raw_supply (regcache, i, regp + SPI_REGMAP);
|
||
}
|
||
}
|
||
|
||
/* Fetch all general-purpose registers from process/thread TID and
|
||
store their values in GDB's register array. */
|
||
|
||
static void
|
||
fetch_regs (struct regcache *regcache, int tid)
|
||
{
|
||
elf_gregset_t regs;
|
||
|
||
if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0)
|
||
perror_with_name (_("Couldn't get registers"));
|
||
|
||
supply_gregset (regcache, (const elf_gregset_t *) ®s);
|
||
}
|
||
|
||
/* Fill register REGNO (if it is a general-purpose register) in
|
||
*GREGSETPS with the value in GDB's register array. If REGNO is -1,
|
||
do this for all registers. */
|
||
|
||
void
|
||
fill_gregset (const struct regcache *regcache,
|
||
elf_gregset_t * gregsetp, int regno)
|
||
{
|
||
elf_greg_t *regp = (elf_greg_t *) gregsetp;
|
||
int i;
|
||
unsigned long psw, bbpsw, tmp;
|
||
|
||
psw = *(regp + PSW_REGMAP);
|
||
bbpsw = *(regp + BBPSW_REGMAP);
|
||
|
||
for (i = 0; i < M32R_LINUX_NUM_REGS; i++)
|
||
{
|
||
if (regno != -1 && regno != i)
|
||
continue;
|
||
|
||
if (i == CBR_REGNUM || i == PSW_REGNUM)
|
||
continue;
|
||
|
||
if (i == SPU_REGNUM || i == SPI_REGNUM)
|
||
continue;
|
||
|
||
if (i != M32R_SP_REGNUM)
|
||
regcache_raw_collect (regcache, i, regp + regmap[i]);
|
||
else if (psw & 0x8000)
|
||
regcache_raw_collect (regcache, i, regp + SPU_REGMAP);
|
||
else
|
||
regcache_raw_collect (regcache, i, regp + SPI_REGMAP);
|
||
}
|
||
}
|
||
|
||
/* Store all valid general-purpose registers in GDB's register array
|
||
into the process/thread specified by TID. */
|
||
|
||
static void
|
||
store_regs (const struct regcache *regcache, int tid, int regno)
|
||
{
|
||
elf_gregset_t regs;
|
||
|
||
if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0)
|
||
perror_with_name (_("Couldn't get registers"));
|
||
|
||
fill_gregset (regcache, ®s, regno);
|
||
|
||
if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0)
|
||
perror_with_name (_("Couldn't write registers"));
|
||
}
|
||
|
||
|
||
|
||
/* Transfering floating-point registers between GDB, inferiors and cores.
|
||
Since M32R has no floating-point registers, these functions do nothing. */
|
||
|
||
void
|
||
supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregs)
|
||
{
|
||
}
|
||
|
||
void
|
||
fill_fpregset (const struct regcache *regcache,
|
||
gdb_fpregset_t *fpregs, int regno)
|
||
{
|
||
}
|
||
|
||
|
||
|
||
/* Transferring arbitrary registers between GDB and inferior. */
|
||
|
||
/* Fetch register REGNO from the child process. If REGNO is -1, do
|
||
this for all registers (including the floating point and SSE
|
||
registers). */
|
||
|
||
static void
|
||
m32r_linux_fetch_inferior_registers (struct target_ops *ops,
|
||
struct regcache *regcache, int regno)
|
||
{
|
||
int tid;
|
||
|
||
/* GNU/Linux LWP ID's are process ID's. */
|
||
tid = ptid_get_lwp (inferior_ptid);
|
||
if (tid == 0)
|
||
tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
|
||
|
||
/* Use the PTRACE_GETREGS request whenever possible, since it
|
||
transfers more registers in one system call, and we'll cache the
|
||
results. */
|
||
if (regno == -1 || GETREGS_SUPPLIES (regno))
|
||
{
|
||
fetch_regs (regcache, tid);
|
||
return;
|
||
}
|
||
|
||
internal_error (__FILE__, __LINE__,
|
||
_("Got request for bad register number %d."), regno);
|
||
}
|
||
|
||
/* Store register REGNO back into the child process. If REGNO is -1,
|
||
do this for all registers (including the floating point and SSE
|
||
registers). */
|
||
static void
|
||
m32r_linux_store_inferior_registers (struct target_ops *ops,
|
||
struct regcache *regcache, int regno)
|
||
{
|
||
int tid;
|
||
|
||
/* GNU/Linux LWP ID's are process ID's. */
|
||
if ((tid = ptid_get_lwp (inferior_ptid)) == 0)
|
||
tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
|
||
|
||
/* Use the PTRACE_SETREGS request whenever possible, since it
|
||
transfers more registers in one system call. */
|
||
if (regno == -1 || GETREGS_SUPPLIES (regno))
|
||
{
|
||
store_regs (regcache, tid, regno);
|
||
return;
|
||
}
|
||
|
||
internal_error (__FILE__, __LINE__,
|
||
_("Got request to store bad register number %d."), regno);
|
||
}
|
||
|
||
void _initialize_m32r_linux_nat (void);
|
||
|
||
void
|
||
_initialize_m32r_linux_nat (void)
|
||
{
|
||
struct target_ops *t;
|
||
|
||
/* Fill in the generic GNU/Linux methods. */
|
||
t = linux_target ();
|
||
|
||
/* Add our register access methods. */
|
||
t->to_fetch_registers = m32r_linux_fetch_inferior_registers;
|
||
t->to_store_registers = m32r_linux_store_inferior_registers;
|
||
|
||
/* Register the target. */
|
||
linux_nat_add_target (t);
|
||
}
|