old-cross-binutils/gdb/m32r-linux-nat.c
Daniel Jacobowitz f973ed9c9f * linux-nat.c (linux_ops_saved): New.
(super_mourn_inferior, kill_inferior, threaded, linux_nat_ops)
	(child_mourn_inferior, child_wait, linux_nat_create_inferior)
	(linux_nat_fetch_registers, linux_nat_store_registers)
	(linux_nat_child_post_startup_inferior, init_linux_nat_ops): Delete.
	(init_lwp_list): Don't set threaded.
	(add_lwp): Don't modify threaded.
	(delete_lwp): Don't mention non-threaded mode.
	(linux_nat_switch_fork): New.
	(linux_nat_attach): Update inferior_ptid.
	(linux_nat_wait): Handle num_lwps == 0 at entry.  Don't check
	threaded flag.
	(linux_nat_kill): Handle pending forks and saved forks.
	(linux_nat_mourn_inferior): Handle saved forks.
	(linux_nat_pid_to_str): Don't use the LWP form when there is
	only one thread.
	(linux_target): Don't set to_wait, to_kill, or to_mourn_inferior.
	(linux_nat_add_target): New.
	(_initialize_linux_nat): Don't initialize the linux native target
	here.
	* linux-nat.h (linux_nat_add_target, linux_nat_switch_fork): New
	prototypes.
	* linux-fork.c: Include "linux-nat.h".
	(add_fork): Update initial PID.
	(fork_load_infrun_state): Call linux_nat_switch_fork.
	* Makefile.in (linux-fork.o): Update.

	* alpha-linux-nat.c (_initialize_alpha_linux_nat): Use
	linux_nat_add_target instead of add_target.
	* amd64-linux-nat.c (_initialize_amd64_linux_nat): Likewise.
	* arm-linux-nat.c (_initialize_arm_linux_nat): Likewise.
	* hppa-linux-nat.c (_initialize_hppa_linux_nat): Likewise.
	* ia64-linux-nat.c (_initialize_ia64_linux_nat): Likewise.
	* i386-linux-nat.c (_initialize_i386_linux_nat): Likewise.
	* m32r-linux-nat.c (_initialize_m32r_linux_nat): Likewise.
	* m68klinux-nat.c (_initialize_m68k_linux_nat): Likewise.
	* mips-linux-nat.c (_initialize_mips_linux_nat): Likewise.
	* ppc-linux-nat.c (_initialize_ppc_linux_nat): Likewise.
	* s390-nat.c (_initialize_s390_nat): Likewise.
	* sparc-linux-nat.c (_initialize_sparc_linux_nat): Likewise.
	* sparc64-linux-nat.c (_initialize_sparc64_linux_nat): Likewise.
2006-03-24 23:08:16 +00:00

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/* Native-dependent code for GNU/Linux m32r.
Copyright (C) 2004, 2005, 2006 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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "inferior.h"
#include "gdbcore.h"
#include "regcache.h"
#include "linux-nat.h"
#include "target.h"
#include "gdb_assert.h"
#include "gdb_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 (elf_gregset_t * gregsetp)
{
elf_greg_t *regp = (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++)
{
switch (i)
{
case PSW_REGNUM:
*(regp + regmap[i]) =
((0x00c1 & bbpsw) << 8) | ((0xc100 & psw) >> 8);
break;
case CBR_REGNUM:
*(regp + regmap[i]) = ((psw >> 8) & 1);
break;
}
if (i != M32R_SP_REGNUM)
regcache_raw_supply (current_regcache, i, regp + regmap[i]);
else if (psw & 0x8000)
regcache_raw_supply (current_regcache, i, regp + SPU_REGMAP);
else
regcache_raw_supply (current_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 (int tid)
{
elf_gregset_t regs;
if (ptrace (PTRACE_GETREGS, tid, 0, (int) &regs) < 0)
perror_with_name (_("Couldn't get registers"));
supply_gregset (&regs);
}
/* 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 (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 (current_regcache, i, regp + regmap[i]);
else if (psw & 0x8000)
regcache_raw_collect (current_regcache, i, regp + SPU_REGMAP);
else
regcache_raw_collect (current_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 (int tid, int regno)
{
elf_gregset_t regs;
if (ptrace (PTRACE_GETREGS, tid, 0, (int) &regs) < 0)
perror_with_name (_("Couldn't get registers"));
fill_gregset (&regs, regno);
if (ptrace (PTRACE_SETREGS, tid, 0, (int) &regs) < 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 (gdb_fpregset_t *fpregs)
{
}
void
fill_fpregset (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 (int regno)
{
int tid;
/* GNU/Linux LWP ID's are process ID's. */
tid = TIDGET (inferior_ptid);
if (tid == 0)
tid = PIDGET (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 (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 (int regno)
{
int tid;
/* GNU/Linux LWP ID's are process ID's. */
if ((tid = TIDGET (inferior_ptid)) == 0)
tid = PIDGET (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 (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);
}