old-cross-binutils/gdb/arm-linux-nat.c
Daniel Jacobowitz cb587d836a * Makefile.in (arm_linux_tdep_h): New variable.
(arm-linux-nat.o, arm-linux-tdep.o): Update.
	* arm-linux-nat.c: Include "arm-linux-tdep.h".
	(typeNone, typeSingle, typeDouble, typeExtended)
	(FPWORDS, ARM_CPSR_REGNUM, FPREG, FPA11)
	(fetch_nwfpe_single, fetch_nwfpe_double, fetch_nwfpe_none)
	(fetch_nwfpe_extended, fetch_nwfpe_register, store_nwfpe_single)
	(store_nwfpe_double, store_nwfpe_extended, store_nwfpe_register):
	Delete.
	(fetch_fpregister, fetch_fpregs, store_fpregister, store_fpregs):
	Use gdb_byte buffers, NWFPE_FPSR_OFFSET, supply_nwfpe_register,
	and collect_nwfpe_register.
	(fill_gregset, supply_gregset, fill_fpregset, supply_fpregset): Use
	new regset functions.
	* arm-linux-tdep.c: Include "regset.h" and "arm-linux-tdep.h".
	(arm_apcs_32): New declaration.
	(ARM_LINUX_SIZEOF_GREGSET, arm_linux_supply_gregset)
	(arm_linux_collect_gregset, typeNone, typeSingle, typeDouble)
	(typeExtended, supply_nwfpe_register, collect_nwfpe_register)
	(arm_linux_supply_nwfpe, arm_linux_collect_nwfpe)
	(arm_linux_regset_from_core_section): New.
	(arm_linux_init_abi): Register arm_linux_regset_from_core_section.
	* arm-linux-tdep.h: New file.
	* arm-tdep.h (struct regset): Declare.
	(struct gdbarch_tdep): Add gregset, fpregset members.
	* config/arm/linux.mh (NATDEPFILES): Remove corelow.o and
	core-regset.o.
	* config/arm/linux.mt (TDEPFILES): Add corelow.o.
2006-07-12 20:46:33 +00:00

506 lines
13 KiB
C

/* GNU/Linux on ARM native support.
Copyright (C) 1999, 2000, 2001, 2002, 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 "gdb_string.h"
#include "regcache.h"
#include "target.h"
#include "linux-nat.h"
#include "arm-tdep.h"
#include "arm-linux-tdep.h"
#include <sys/user.h>
#include <sys/ptrace.h>
#include <sys/utsname.h>
#include <sys/procfs.h>
/* Prototypes for supply_gregset etc. */
#include "gregset.h"
/* Defines ps_err_e, struct ps_prochandle. */
#include "gdb_proc_service.h"
#ifndef PTRACE_GET_THREAD_AREA
#define PTRACE_GET_THREAD_AREA 22
#endif
extern int arm_apcs_32;
/* The following variables are used to determine the version of the
underlying GNU/Linux operating system. Examples:
GNU/Linux 2.0.35 GNU/Linux 2.2.12
os_version = 0x00020023 os_version = 0x0002020c
os_major = 2 os_major = 2
os_minor = 0 os_minor = 2
os_release = 35 os_release = 12
Note: os_version = (os_major << 16) | (os_minor << 8) | os_release
These are initialized using get_linux_version() from
_initialize_arm_linux_nat(). */
static unsigned int os_version, os_major, os_minor, os_release;
/* On GNU/Linux, threads are implemented as pseudo-processes, in which
case we may be tracing more than one process at a time. In that
case, inferior_ptid will contain the main process ID and the
individual thread (process) ID. get_thread_id () is used to get
the thread id if it's available, and the process id otherwise. */
int
get_thread_id (ptid_t ptid)
{
int tid = TIDGET (ptid);
if (0 == tid)
tid = PIDGET (ptid);
return tid;
}
#define GET_THREAD_ID(PTID) get_thread_id ((PTID));
/* Get the value of a particular register from the floating point
state of the process and store it into regcache. */
static void
fetch_fpregister (int regno)
{
int ret, tid;
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
/* Read the floating point state. */
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch floating point register."));
return;
}
/* Fetch fpsr. */
if (ARM_FPS_REGNUM == regno)
regcache_raw_supply (current_regcache, ARM_FPS_REGNUM,
fp + NWFPE_FPSR_OFFSET);
/* Fetch the floating point register. */
if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
supply_nwfpe_register (current_regcache, regno, fp);
}
/* Get the whole floating point state of the process and store it
into regcache. */
static void
fetch_fpregs (void)
{
int ret, regno, tid;
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
/* Read the floating point state. */
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch the floating point registers."));
return;
}
/* Fetch fpsr. */
regcache_raw_supply (current_regcache, ARM_FPS_REGNUM,
fp + NWFPE_FPSR_OFFSET);
/* Fetch the floating point registers. */
for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
supply_nwfpe_register (current_regcache, regno, fp);
}
/* Save a particular register into the floating point state of the
process using the contents from regcache. */
static void
store_fpregister (int regno)
{
int ret, tid;
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
/* Read the floating point state. */
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch the floating point registers."));
return;
}
/* Store fpsr. */
if (ARM_FPS_REGNUM == regno && register_cached (ARM_FPS_REGNUM))
regcache_raw_collect (current_regcache, ARM_FPS_REGNUM,
fp + NWFPE_FPSR_OFFSET);
/* Store the floating point register. */
if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
collect_nwfpe_register (current_regcache, regno, fp);
ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to store floating point register."));
return;
}
}
/* Save the whole floating point state of the process using
the contents from regcache. */
static void
store_fpregs (void)
{
int ret, regno, tid;
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
/* Read the floating point state. */
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to fetch the floating point registers."));
return;
}
/* Store fpsr. */
if (register_cached (ARM_FPS_REGNUM))
regcache_raw_collect (current_regcache, ARM_FPS_REGNUM,
fp + NWFPE_FPSR_OFFSET);
/* Store the floating point registers. */
for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
if (register_cached (regno))
collect_nwfpe_register (current_regcache, regno, fp);
ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
if (ret < 0)
{
warning (_("Unable to store floating point registers."));
return;
}
}
/* Fetch a general register of the process and store into
regcache. */
static void
fetch_register (int regno)
{
int ret, tid;
elf_gregset_t regs;
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs);
if (ret < 0)
{
warning (_("Unable to fetch general register."));
return;
}
if (regno >= ARM_A1_REGNUM && regno < ARM_PC_REGNUM)
regcache_raw_supply (current_regcache, regno, (char *) &regs[regno]);
if (ARM_PS_REGNUM == regno)
{
if (arm_apcs_32)
regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
(char *) &regs[ARM_CPSR_REGNUM]);
else
regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
(char *) &regs[ARM_PC_REGNUM]);
}
if (ARM_PC_REGNUM == regno)
{
regs[ARM_PC_REGNUM] = ADDR_BITS_REMOVE (regs[ARM_PC_REGNUM]);
regcache_raw_supply (current_regcache, ARM_PC_REGNUM,
(char *) &regs[ARM_PC_REGNUM]);
}
}
/* Fetch all general registers of the process and store into
regcache. */
static void
fetch_regs (void)
{
int ret, regno, tid;
elf_gregset_t regs;
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs);
if (ret < 0)
{
warning (_("Unable to fetch general registers."));
return;
}
for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
regcache_raw_supply (current_regcache, regno, (char *) &regs[regno]);
if (arm_apcs_32)
regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
(char *) &regs[ARM_CPSR_REGNUM]);
else
regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
(char *) &regs[ARM_PC_REGNUM]);
regs[ARM_PC_REGNUM] = ADDR_BITS_REMOVE (regs[ARM_PC_REGNUM]);
regcache_raw_supply (current_regcache, ARM_PC_REGNUM,
(char *) &regs[ARM_PC_REGNUM]);
}
/* Store all general registers of the process from the values in
regcache. */
static void
store_register (int regno)
{
int ret, tid;
elf_gregset_t regs;
if (!register_cached (regno))
return;
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
/* Get the general registers from the process. */
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs);
if (ret < 0)
{
warning (_("Unable to fetch general registers."));
return;
}
if (regno >= ARM_A1_REGNUM && regno <= ARM_PC_REGNUM)
regcache_raw_collect (current_regcache, regno, (char *) &regs[regno]);
else if (arm_apcs_32 && regno == ARM_PS_REGNUM)
regcache_raw_collect (current_regcache, regno,
(char *) &regs[ARM_CPSR_REGNUM]);
else if (!arm_apcs_32 && regno == ARM_PS_REGNUM)
regcache_raw_collect (current_regcache, ARM_PC_REGNUM,
(char *) &regs[ARM_PC_REGNUM]);
ret = ptrace (PTRACE_SETREGS, tid, 0, &regs);
if (ret < 0)
{
warning (_("Unable to store general register."));
return;
}
}
static void
store_regs (void)
{
int ret, regno, tid;
elf_gregset_t regs;
/* Get the thread id for the ptrace call. */
tid = GET_THREAD_ID (inferior_ptid);
/* Fetch the general registers. */
ret = ptrace (PTRACE_GETREGS, tid, 0, &regs);
if (ret < 0)
{
warning (_("Unable to fetch general registers."));
return;
}
for (regno = ARM_A1_REGNUM; regno <= ARM_PC_REGNUM; regno++)
{
if (register_cached (regno))
regcache_raw_collect (current_regcache, regno, (char *) &regs[regno]);
}
if (arm_apcs_32 && register_cached (ARM_PS_REGNUM))
regcache_raw_collect (current_regcache, ARM_PS_REGNUM,
(char *) &regs[ARM_CPSR_REGNUM]);
ret = ptrace (PTRACE_SETREGS, tid, 0, &regs);
if (ret < 0)
{
warning (_("Unable to store general registers."));
return;
}
}
/* Fetch registers from the child process. Fetch all registers if
regno == -1, otherwise fetch all general registers or all floating
point registers depending upon the value of regno. */
static void
arm_linux_fetch_inferior_registers (int regno)
{
if (-1 == regno)
{
fetch_regs ();
fetch_fpregs ();
}
else
{
if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM)
fetch_register (regno);
if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
fetch_fpregister (regno);
}
}
/* Store registers back into the inferior. Store all registers if
regno == -1, otherwise store all general registers or all floating
point registers depending upon the value of regno. */
static void
arm_linux_store_inferior_registers (int regno)
{
if (-1 == regno)
{
store_regs ();
store_fpregs ();
}
else
{
if ((regno < ARM_F0_REGNUM) || (regno > ARM_FPS_REGNUM))
store_register (regno);
if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
store_fpregister (regno);
}
}
/* Wrapper functions for the standard regset handling, used by
thread debugging. */
void
fill_gregset (gdb_gregset_t *gregsetp, int regno)
{
arm_linux_collect_gregset (NULL, current_regcache, regno, gregsetp, 0);
}
void
supply_gregset (gdb_gregset_t *gregsetp)
{
arm_linux_supply_gregset (NULL, current_regcache, -1, gregsetp, 0);
}
void
fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
{
arm_linux_collect_nwfpe (NULL, current_regcache, regno, fpregsetp, 0);
}
/* Fill GDB's register array with the floating-point register values
in *fpregsetp. */
void
supply_fpregset (gdb_fpregset_t *fpregsetp)
{
arm_linux_supply_nwfpe (NULL, current_regcache, -1, fpregsetp, 0);
}
int
arm_linux_kernel_u_size (void)
{
return (sizeof (struct user));
}
/* Fetch the thread-local storage pointer for libthread_db. */
ps_err_e
ps_get_thread_area (const struct ps_prochandle *ph,
lwpid_t lwpid, int idx, void **base)
{
if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
return PS_ERR;
/* IDX is the bias from the thread pointer to the beginning of the
thread descriptor. It has to be subtracted due to implementation
quirks in libthread_db. */
*base = (void *) ((char *)*base - idx);
return PS_OK;
}
static unsigned int
get_linux_version (unsigned int *vmajor,
unsigned int *vminor,
unsigned int *vrelease)
{
struct utsname info;
char *pmajor, *pminor, *prelease, *tail;
if (-1 == uname (&info))
{
warning (_("Unable to determine GNU/Linux version."));
return -1;
}
pmajor = strtok (info.release, ".");
pminor = strtok (NULL, ".");
prelease = strtok (NULL, ".");
*vmajor = (unsigned int) strtoul (pmajor, &tail, 0);
*vminor = (unsigned int) strtoul (pminor, &tail, 0);
*vrelease = (unsigned int) strtoul (prelease, &tail, 0);
return ((*vmajor << 16) | (*vminor << 8) | *vrelease);
}
void _initialize_arm_linux_nat (void);
void
_initialize_arm_linux_nat (void)
{
struct target_ops *t;
os_version = get_linux_version (&os_major, &os_minor, &os_release);
/* Fill in the generic GNU/Linux methods. */
t = linux_target ();
/* Add our register access methods. */
t->to_fetch_registers = arm_linux_fetch_inferior_registers;
t->to_store_registers = arm_linux_store_inferior_registers;
/* Register the target. */
linux_nat_add_target (t);
}