741 lines
18 KiB
C
741 lines
18 KiB
C
/* GNU/Linux on ARM native support.
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Copyright 1999, 2000, 2001, 2002, 2004, 2005
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program 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 2 of the License, or
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(at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "inferior.h"
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#include "gdbcore.h"
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#include "gdb_string.h"
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#include "regcache.h"
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#include "target.h"
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#include "linux-nat.h"
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#include "arm-tdep.h"
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#include <sys/user.h>
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#include <sys/ptrace.h>
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#include <sys/utsname.h>
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#include <sys/procfs.h>
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/* Prototypes for supply_gregset etc. */
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#include "gregset.h"
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extern int arm_apcs_32;
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#define typeNone 0x00
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#define typeSingle 0x01
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#define typeDouble 0x02
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#define typeExtended 0x03
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#define FPWORDS 28
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#define ARM_CPSR_REGNUM 16
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typedef union tagFPREG
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{
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unsigned int fSingle;
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unsigned int fDouble[2];
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unsigned int fExtended[3];
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}
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FPREG;
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typedef struct tagFPA11
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{
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FPREG fpreg[8]; /* 8 floating point registers */
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unsigned int fpsr; /* floating point status register */
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unsigned int fpcr; /* floating point control register */
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unsigned char fType[8]; /* type of floating point value held in
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floating point registers. */
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int initflag; /* NWFPE initialization flag. */
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}
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FPA11;
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/* The following variables are used to determine the version of the
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underlying GNU/Linux operating system. Examples:
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GNU/Linux 2.0.35 GNU/Linux 2.2.12
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os_version = 0x00020023 os_version = 0x0002020c
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os_major = 2 os_major = 2
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os_minor = 0 os_minor = 2
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os_release = 35 os_release = 12
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Note: os_version = (os_major << 16) | (os_minor << 8) | os_release
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These are initialized using get_linux_version() from
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_initialize_arm_linux_nat(). */
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static unsigned int os_version, os_major, os_minor, os_release;
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/* On GNU/Linux, threads are implemented as pseudo-processes, in which
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case we may be tracing more than one process at a time. In that
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case, inferior_ptid will contain the main process ID and the
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individual thread (process) ID. get_thread_id () is used to get
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the thread id if it's available, and the process id otherwise. */
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int
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get_thread_id (ptid_t ptid)
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{
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int tid = TIDGET (ptid);
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if (0 == tid)
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tid = PIDGET (ptid);
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return tid;
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}
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#define GET_THREAD_ID(PTID) get_thread_id ((PTID));
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static void
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fetch_nwfpe_single (unsigned int fn, FPA11 * fpa11)
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{
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unsigned int mem[3];
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mem[0] = fpa11->fpreg[fn].fSingle;
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mem[1] = 0;
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mem[2] = 0;
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regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
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}
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static void
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fetch_nwfpe_double (unsigned int fn, FPA11 * fpa11)
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{
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unsigned int mem[3];
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mem[0] = fpa11->fpreg[fn].fDouble[1];
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mem[1] = fpa11->fpreg[fn].fDouble[0];
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mem[2] = 0;
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regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
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}
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static void
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fetch_nwfpe_none (unsigned int fn)
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{
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unsigned int mem[3] =
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{0, 0, 0};
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regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
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}
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static void
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fetch_nwfpe_extended (unsigned int fn, FPA11 * fpa11)
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{
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unsigned int mem[3];
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mem[0] = fpa11->fpreg[fn].fExtended[0]; /* sign & exponent */
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mem[1] = fpa11->fpreg[fn].fExtended[2]; /* ls bits */
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mem[2] = fpa11->fpreg[fn].fExtended[1]; /* ms bits */
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regcache_raw_supply (current_regcache, ARM_F0_REGNUM + fn, (char *) &mem[0]);
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}
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static void
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fetch_nwfpe_register (int regno, FPA11 * fpa11)
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{
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int fn = regno - ARM_F0_REGNUM;
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switch (fpa11->fType[fn])
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{
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case typeSingle:
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fetch_nwfpe_single (fn, fpa11);
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break;
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case typeDouble:
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fetch_nwfpe_double (fn, fpa11);
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break;
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case typeExtended:
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fetch_nwfpe_extended (fn, fpa11);
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break;
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default:
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fetch_nwfpe_none (fn);
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}
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}
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static void
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store_nwfpe_single (unsigned int fn, FPA11 *fpa11)
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{
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unsigned int mem[3];
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regcache_raw_collect (current_regcache, ARM_F0_REGNUM + fn,
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(char *) &mem[0]);
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fpa11->fpreg[fn].fSingle = mem[0];
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fpa11->fType[fn] = typeSingle;
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}
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static void
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store_nwfpe_double (unsigned int fn, FPA11 *fpa11)
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{
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unsigned int mem[3];
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regcache_raw_collect (current_regcache, ARM_F0_REGNUM + fn,
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(char *) &mem[0]);
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fpa11->fpreg[fn].fDouble[1] = mem[0];
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fpa11->fpreg[fn].fDouble[0] = mem[1];
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fpa11->fType[fn] = typeDouble;
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}
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void
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store_nwfpe_extended (unsigned int fn, FPA11 *fpa11)
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{
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unsigned int mem[3];
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regcache_raw_collect (current_regcache, ARM_F0_REGNUM + fn,
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(char *) &mem[0]);
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fpa11->fpreg[fn].fExtended[0] = mem[0]; /* sign & exponent */
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fpa11->fpreg[fn].fExtended[2] = mem[1]; /* ls bits */
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fpa11->fpreg[fn].fExtended[1] = mem[2]; /* ms bits */
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fpa11->fType[fn] = typeDouble;
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}
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void
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store_nwfpe_register (int regno, FPA11 * fpa11)
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{
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if (register_cached (regno))
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{
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unsigned int fn = regno - ARM_F0_REGNUM;
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switch (fpa11->fType[fn])
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{
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case typeSingle:
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store_nwfpe_single (fn, fpa11);
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break;
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case typeDouble:
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store_nwfpe_double (fn, fpa11);
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break;
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case typeExtended:
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store_nwfpe_extended (fn, fpa11);
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break;
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}
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}
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}
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/* Get the value of a particular register from the floating point
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state of the process and store it into regcache. */
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static void
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fetch_fpregister (int regno)
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{
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int ret, tid;
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FPA11 fp;
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/* Get the thread id for the ptrace call. */
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tid = GET_THREAD_ID (inferior_ptid);
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/* Read the floating point state. */
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ret = ptrace (PT_GETFPREGS, tid, 0, &fp);
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if (ret < 0)
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{
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warning (_("Unable to fetch floating point register."));
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return;
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}
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/* Fetch fpsr. */
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if (ARM_FPS_REGNUM == regno)
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regcache_raw_supply (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
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/* Fetch the floating point register. */
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if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
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{
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int fn = regno - ARM_F0_REGNUM;
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switch (fp.fType[fn])
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{
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case typeSingle:
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fetch_nwfpe_single (fn, &fp);
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break;
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case typeDouble:
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fetch_nwfpe_double (fn, &fp);
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break;
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case typeExtended:
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fetch_nwfpe_extended (fn, &fp);
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break;
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default:
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fetch_nwfpe_none (fn);
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}
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}
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}
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/* Get the whole floating point state of the process and store it
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into regcache. */
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static void
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fetch_fpregs (void)
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{
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int ret, regno, tid;
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FPA11 fp;
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/* Get the thread id for the ptrace call. */
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tid = GET_THREAD_ID (inferior_ptid);
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/* Read the floating point state. */
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ret = ptrace (PT_GETFPREGS, tid, 0, &fp);
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if (ret < 0)
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{
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warning (_("Unable to fetch the floating point registers."));
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return;
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}
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/* Fetch fpsr. */
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regcache_raw_supply (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
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/* Fetch the floating point registers. */
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for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
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{
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int fn = regno - ARM_F0_REGNUM;
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switch (fp.fType[fn])
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{
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case typeSingle:
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fetch_nwfpe_single (fn, &fp);
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break;
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case typeDouble:
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fetch_nwfpe_double (fn, &fp);
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break;
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case typeExtended:
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fetch_nwfpe_extended (fn, &fp);
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break;
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default:
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fetch_nwfpe_none (fn);
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}
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}
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}
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/* Save a particular register into the floating point state of the
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process using the contents from regcache. */
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static void
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store_fpregister (int regno)
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{
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int ret, tid;
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FPA11 fp;
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/* Get the thread id for the ptrace call. */
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tid = GET_THREAD_ID (inferior_ptid);
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/* Read the floating point state. */
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ret = ptrace (PT_GETFPREGS, tid, 0, &fp);
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if (ret < 0)
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{
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warning (_("Unable to fetch the floating point registers."));
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return;
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}
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/* Store fpsr. */
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if (ARM_FPS_REGNUM == regno && register_cached (ARM_FPS_REGNUM))
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regcache_raw_collect (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
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/* Store the floating point register. */
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if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
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{
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store_nwfpe_register (regno, &fp);
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}
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ret = ptrace (PTRACE_SETFPREGS, tid, 0, &fp);
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if (ret < 0)
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{
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warning (_("Unable to store floating point register."));
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return;
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}
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}
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/* Save the whole floating point state of the process using
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the contents from regcache. */
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static void
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store_fpregs (void)
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{
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int ret, regno, tid;
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FPA11 fp;
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/* Get the thread id for the ptrace call. */
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tid = GET_THREAD_ID (inferior_ptid);
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/* Read the floating point state. */
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ret = ptrace (PT_GETFPREGS, tid, 0, &fp);
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if (ret < 0)
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{
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warning (_("Unable to fetch the floating point registers."));
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return;
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}
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/* Store fpsr. */
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if (register_cached (ARM_FPS_REGNUM))
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regcache_raw_collect (current_regcache, ARM_FPS_REGNUM, (char *) &fp.fpsr);
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/* Store the floating point registers. */
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for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
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{
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fetch_nwfpe_register (regno, &fp);
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}
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ret = ptrace (PTRACE_SETFPREGS, tid, 0, &fp);
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if (ret < 0)
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{
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warning (_("Unable to store floating point registers."));
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return;
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}
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}
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/* Fetch a general register of the process and store into
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regcache. */
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static void
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fetch_register (int regno)
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{
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int ret, tid;
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elf_gregset_t regs;
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/* Get the thread id for the ptrace call. */
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tid = GET_THREAD_ID (inferior_ptid);
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ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
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if (ret < 0)
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{
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warning (_("Unable to fetch general register."));
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return;
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}
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if (regno >= ARM_A1_REGNUM && regno < ARM_PC_REGNUM)
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regcache_raw_supply (current_regcache, regno, (char *) ®s[regno]);
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if (ARM_PS_REGNUM == regno)
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{
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if (arm_apcs_32)
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regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
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(char *) ®s[ARM_CPSR_REGNUM]);
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else
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regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
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(char *) ®s[ARM_PC_REGNUM]);
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}
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if (ARM_PC_REGNUM == regno)
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{
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regs[ARM_PC_REGNUM] = ADDR_BITS_REMOVE (regs[ARM_PC_REGNUM]);
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regcache_raw_supply (current_regcache, ARM_PC_REGNUM,
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(char *) ®s[ARM_PC_REGNUM]);
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}
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}
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/* Fetch all general registers of the process and store into
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regcache. */
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static void
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fetch_regs (void)
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{
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int ret, regno, tid;
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elf_gregset_t regs;
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/* Get the thread id for the ptrace call. */
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tid = GET_THREAD_ID (inferior_ptid);
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ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
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if (ret < 0)
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{
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warning (_("Unable to fetch general registers."));
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return;
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}
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for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
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regcache_raw_supply (current_regcache, regno, (char *) ®s[regno]);
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if (arm_apcs_32)
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regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
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(char *) ®s[ARM_CPSR_REGNUM]);
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else
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regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
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(char *) ®s[ARM_PC_REGNUM]);
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regs[ARM_PC_REGNUM] = ADDR_BITS_REMOVE (regs[ARM_PC_REGNUM]);
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regcache_raw_supply (current_regcache, ARM_PC_REGNUM,
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(char *) ®s[ARM_PC_REGNUM]);
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}
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/* Store all general registers of the process from the values in
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regcache. */
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static void
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store_register (int regno)
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{
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int ret, tid;
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elf_gregset_t regs;
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if (!register_cached (regno))
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return;
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/* Get the thread id for the ptrace call. */
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tid = GET_THREAD_ID (inferior_ptid);
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/* Get the general registers from the process. */
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ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
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if (ret < 0)
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{
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warning (_("Unable to fetch general registers."));
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return;
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}
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if (regno >= ARM_A1_REGNUM && regno <= ARM_PC_REGNUM)
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regcache_raw_collect (current_regcache, regno, (char *) ®s[regno]);
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else if (arm_apcs_32 && regno == ARM_PS_REGNUM)
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regcache_raw_collect (current_regcache, regno,
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(char *) ®s[ARM_CPSR_REGNUM]);
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else if (!arm_apcs_32 && regno == ARM_PS_REGNUM)
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regcache_raw_collect (current_regcache, ARM_PC_REGNUM,
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(char *) ®s[ARM_PC_REGNUM]);
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ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
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if (ret < 0)
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{
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warning (_("Unable to store general register."));
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return;
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}
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}
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static void
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store_regs (void)
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{
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int ret, regno, tid;
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elf_gregset_t regs;
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/* Get the thread id for the ptrace call. */
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tid = GET_THREAD_ID (inferior_ptid);
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|
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/* Fetch the general registers. */
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ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
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if (ret < 0)
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{
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warning (_("Unable to fetch general registers."));
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return;
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}
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for (regno = ARM_A1_REGNUM; regno <= ARM_PC_REGNUM; regno++)
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{
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if (register_cached (regno))
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regcache_raw_collect (current_regcache, regno, (char *) ®s[regno]);
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}
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if (arm_apcs_32 && register_cached (ARM_PS_REGNUM))
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regcache_raw_collect (current_regcache, ARM_PS_REGNUM,
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(char *) ®s[ARM_CPSR_REGNUM]);
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ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
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|
|
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);
|
|
}
|
|
}
|
|
|
|
/* Fill register regno (if it is a general-purpose register) in
|
|
*gregsetp with the appropriate value from GDB's register array.
|
|
If regno is -1, do this for all registers. */
|
|
|
|
void
|
|
fill_gregset (gdb_gregset_t *gregsetp, int regno)
|
|
{
|
|
if (-1 == regno)
|
|
{
|
|
int regnum;
|
|
for (regnum = ARM_A1_REGNUM; regnum <= ARM_PC_REGNUM; regnum++)
|
|
regcache_raw_collect (current_regcache, regnum,
|
|
(char *) &(*gregsetp)[regnum]);
|
|
}
|
|
else if (regno >= ARM_A1_REGNUM && regno <= ARM_PC_REGNUM)
|
|
regcache_raw_collect (current_regcache, regno,
|
|
(char *) &(*gregsetp)[regno]);
|
|
|
|
if (ARM_PS_REGNUM == regno || -1 == regno)
|
|
{
|
|
if (arm_apcs_32)
|
|
regcache_raw_collect (current_regcache, ARM_PS_REGNUM,
|
|
(char *) &(*gregsetp)[ARM_CPSR_REGNUM]);
|
|
else
|
|
regcache_raw_collect (current_regcache, ARM_PC_REGNUM,
|
|
(char *) &(*gregsetp)[ARM_PC_REGNUM]);
|
|
}
|
|
}
|
|
|
|
/* Fill GDB's register array with the general-purpose register values
|
|
in *gregsetp. */
|
|
|
|
void
|
|
supply_gregset (gdb_gregset_t *gregsetp)
|
|
{
|
|
int regno, reg_pc;
|
|
|
|
for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
|
|
regcache_raw_supply (current_regcache, regno,
|
|
(char *) &(*gregsetp)[regno]);
|
|
|
|
if (arm_apcs_32)
|
|
regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
|
|
(char *) &(*gregsetp)[ARM_CPSR_REGNUM]);
|
|
else
|
|
regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
|
|
(char *) &(*gregsetp)[ARM_PC_REGNUM]);
|
|
|
|
reg_pc = ADDR_BITS_REMOVE ((CORE_ADDR)(*gregsetp)[ARM_PC_REGNUM]);
|
|
regcache_raw_supply (current_regcache, ARM_PC_REGNUM, (char *) ®_pc);
|
|
}
|
|
|
|
/* Fill register regno (if it is a floating-point register) in
|
|
*fpregsetp with the appropriate value from GDB's register array.
|
|
If regno is -1, do this for all registers. */
|
|
|
|
void
|
|
fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
|
|
{
|
|
FPA11 *fp = (FPA11 *) fpregsetp;
|
|
|
|
if (-1 == regno)
|
|
{
|
|
int regnum;
|
|
for (regnum = ARM_F0_REGNUM; regnum <= ARM_F7_REGNUM; regnum++)
|
|
store_nwfpe_register (regnum, fp);
|
|
}
|
|
else if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
|
|
{
|
|
store_nwfpe_register (regno, fp);
|
|
return;
|
|
}
|
|
|
|
/* Store fpsr. */
|
|
if (ARM_FPS_REGNUM == regno || -1 == regno)
|
|
regcache_raw_collect (current_regcache, ARM_FPS_REGNUM,
|
|
(char *) &fp->fpsr);
|
|
}
|
|
|
|
/* Fill GDB's register array with the floating-point register values
|
|
in *fpregsetp. */
|
|
|
|
void
|
|
supply_fpregset (gdb_fpregset_t *fpregsetp)
|
|
{
|
|
int regno;
|
|
FPA11 *fp = (FPA11 *) fpregsetp;
|
|
|
|
/* Fetch fpsr. */
|
|
regcache_raw_supply (current_regcache, ARM_FPS_REGNUM, (char *) &fp->fpsr);
|
|
|
|
/* Fetch the floating point registers. */
|
|
for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
|
|
{
|
|
fetch_nwfpe_register (regno, fp);
|
|
}
|
|
}
|
|
|
|
int
|
|
arm_linux_kernel_u_size (void)
|
|
{
|
|
return (sizeof (struct user));
|
|
}
|
|
|
|
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. */
|
|
add_target (t);
|
|
}
|