/* GNU/Linux on ARM native support.
- Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2006
- Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009,
+ 2010 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
+ 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,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "inferior.h"
#include "regcache.h"
#include "target.h"
#include "linux-nat.h"
+#include "target-descriptions.h"
+#include "auxv.h"
#include "arm-tdep.h"
#include "arm-linux-tdep.h"
+#include <elf/common.h>
#include <sys/user.h>
#include <sys/ptrace.h>
#include <sys/utsname.h>
/* Defines ps_err_e, struct ps_prochandle. */
#include "gdb_proc_service.h"
+#include "features/arm-with-iwmmxt.c"
+#include "features/arm-with-vfpv2.c"
+#include "features/arm-with-vfpv3.c"
+#include "features/arm-with-neon.c"
+
#ifndef PTRACE_GET_THREAD_AREA
#define PTRACE_GET_THREAD_AREA 22
#endif
+#ifndef PTRACE_GETWMMXREGS
+#define PTRACE_GETWMMXREGS 18
+#define PTRACE_SETWMMXREGS 19
+#endif
+
+#ifndef PTRACE_GETVFPREGS
+#define PTRACE_GETVFPREGS 27
+#define PTRACE_SETVFPREGS 28
+#endif
+
+/* These are in <asm/elf.h> in current kernels. */
+#define HWCAP_VFP 64
+#define HWCAP_IWMMXT 512
+#define HWCAP_NEON 4096
+#define HWCAP_VFPv3 8192
+#define HWCAP_VFPv3D16 16384
+
+/* A flag for whether the WMMX registers are available. */
+static int arm_linux_has_wmmx_registers;
+
+/* The number of 64-bit VFP registers we have (expect this to be 0,
+ 16, or 32). */
+static int arm_linux_vfp_register_count;
+
extern int arm_apcs_32;
/* The following variables are used to determine the version of the
tid = PIDGET (ptid);
return tid;
}
-#define GET_THREAD_ID(PTID) get_thread_id ((PTID));
+
+#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)
+fetch_fpregister (struct regcache *regcache, int regno)
{
int ret, tid;
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
/* Fetch fpsr. */
if (ARM_FPS_REGNUM == regno)
- regcache_raw_supply (current_regcache, ARM_FPS_REGNUM,
+ regcache_raw_supply (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);
+ supply_nwfpe_register (regcache, regno, fp);
}
/* Get the whole floating point state of the process and store it
into regcache. */
static void
-fetch_fpregs (void)
+fetch_fpregs (struct regcache *regcache)
{
int ret, regno, tid;
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
}
/* Fetch fpsr. */
- regcache_raw_supply (current_regcache, ARM_FPS_REGNUM,
+ regcache_raw_supply (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);
+ supply_nwfpe_register (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)
+store_fpregister (const struct regcache *regcache, int regno)
{
int ret, tid;
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
}
/* Store fpsr. */
- if (ARM_FPS_REGNUM == regno && register_cached (ARM_FPS_REGNUM))
- regcache_raw_collect (current_regcache, ARM_FPS_REGNUM,
- fp + NWFPE_FPSR_OFFSET);
+ if (ARM_FPS_REGNUM == regno && regcache_valid_p (regcache, ARM_FPS_REGNUM))
+ regcache_raw_collect (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);
+ collect_nwfpe_register (regcache, regno, fp);
ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
if (ret < 0)
the contents from regcache. */
static void
-store_fpregs (void)
+store_fpregs (const struct regcache *regcache)
{
int ret, regno, tid;
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
}
/* Store fpsr. */
- if (register_cached (ARM_FPS_REGNUM))
- regcache_raw_collect (current_regcache, ARM_FPS_REGNUM,
- fp + NWFPE_FPSR_OFFSET);
+ if (regcache_valid_p (regcache, ARM_FPS_REGNUM))
+ regcache_raw_collect (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);
+ if (regcache_valid_p (regcache, regno))
+ collect_nwfpe_register (regcache, regno, fp);
ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
if (ret < 0)
regcache. */
static void
-fetch_register (int regno)
+fetch_register (struct regcache *regcache, int regno)
{
int ret, tid;
elf_gregset_t regs;
}
if (regno >= ARM_A1_REGNUM && regno < ARM_PC_REGNUM)
- regcache_raw_supply (current_regcache, regno, (char *) ®s[regno]);
+ regcache_raw_supply (regcache, regno, (char *) ®s[regno]);
if (ARM_PS_REGNUM == regno)
{
if (arm_apcs_32)
- regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
- (char *) ®s[ARM_CPSR_REGNUM]);
+ regcache_raw_supply (regcache, ARM_PS_REGNUM,
+ (char *) ®s[ARM_CPSR_GREGNUM]);
else
- regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
+ regcache_raw_supply (regcache, ARM_PS_REGNUM,
(char *) ®s[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,
+ regs[ARM_PC_REGNUM] = gdbarch_addr_bits_remove
+ (get_regcache_arch (regcache),
+ regs[ARM_PC_REGNUM]);
+ regcache_raw_supply (regcache, ARM_PC_REGNUM,
(char *) ®s[ARM_PC_REGNUM]);
}
}
regcache. */
static void
-fetch_regs (void)
+fetch_regs (struct regcache *regcache)
{
int ret, regno, tid;
elf_gregset_t regs;
}
for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
- regcache_raw_supply (current_regcache, regno, (char *) ®s[regno]);
+ regcache_raw_supply (regcache, regno, (char *) ®s[regno]);
if (arm_apcs_32)
- regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
- (char *) ®s[ARM_CPSR_REGNUM]);
+ regcache_raw_supply (regcache, ARM_PS_REGNUM,
+ (char *) ®s[ARM_CPSR_GREGNUM]);
else
- regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
+ regcache_raw_supply (regcache, ARM_PS_REGNUM,
(char *) ®s[ARM_PC_REGNUM]);
- regs[ARM_PC_REGNUM] = ADDR_BITS_REMOVE (regs[ARM_PC_REGNUM]);
- regcache_raw_supply (current_regcache, ARM_PC_REGNUM,
+ regs[ARM_PC_REGNUM] = gdbarch_addr_bits_remove
+ (get_regcache_arch (regcache), regs[ARM_PC_REGNUM]);
+ regcache_raw_supply (regcache, ARM_PC_REGNUM,
(char *) ®s[ARM_PC_REGNUM]);
}
regcache. */
static void
-store_register (int regno)
+store_register (const struct regcache *regcache, int regno)
{
int ret, tid;
elf_gregset_t regs;
- if (!register_cached (regno))
+ if (!regcache_valid_p (regcache, regno))
return;
/* Get the thread id for the ptrace call. */
}
if (regno >= ARM_A1_REGNUM && regno <= ARM_PC_REGNUM)
- regcache_raw_collect (current_regcache, regno, (char *) ®s[regno]);
+ regcache_raw_collect (regcache, regno, (char *) ®s[regno]);
else if (arm_apcs_32 && regno == ARM_PS_REGNUM)
- regcache_raw_collect (current_regcache, regno,
- (char *) ®s[ARM_CPSR_REGNUM]);
+ regcache_raw_collect (regcache, regno,
+ (char *) ®s[ARM_CPSR_GREGNUM]);
else if (!arm_apcs_32 && regno == ARM_PS_REGNUM)
- regcache_raw_collect (current_regcache, ARM_PC_REGNUM,
+ regcache_raw_collect (regcache, ARM_PC_REGNUM,
(char *) ®s[ARM_PC_REGNUM]);
ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
}
static void
-store_regs (void)
+store_regs (const struct regcache *regcache)
{
int ret, regno, tid;
elf_gregset_t regs;
for (regno = ARM_A1_REGNUM; regno <= ARM_PC_REGNUM; regno++)
{
- if (register_cached (regno))
- regcache_raw_collect (current_regcache, regno, (char *) ®s[regno]);
+ if (regcache_valid_p (regcache, regno))
+ regcache_raw_collect (regcache, regno, (char *) ®s[regno]);
}
- if (arm_apcs_32 && register_cached (ARM_PS_REGNUM))
- regcache_raw_collect (current_regcache, ARM_PS_REGNUM,
- (char *) ®s[ARM_CPSR_REGNUM]);
+ if (arm_apcs_32 && regcache_valid_p (regcache, ARM_PS_REGNUM))
+ regcache_raw_collect (regcache, ARM_PS_REGNUM,
+ (char *) ®s[ARM_CPSR_GREGNUM]);
ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
}
}
+/* Fetch all WMMX registers of the process and store into
+ regcache. */
+
+#define IWMMXT_REGS_SIZE (16 * 8 + 6 * 4)
+
+static void
+fetch_wmmx_regs (struct regcache *regcache)
+{
+ char regbuf[IWMMXT_REGS_SIZE];
+ int ret, regno, tid;
+
+ /* Get the thread id for the ptrace call. */
+ tid = GET_THREAD_ID (inferior_ptid);
+
+ ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
+ if (ret < 0)
+ {
+ warning (_("Unable to fetch WMMX registers."));
+ return;
+ }
+
+ for (regno = 0; regno < 16; regno++)
+ regcache_raw_supply (regcache, regno + ARM_WR0_REGNUM,
+ ®buf[regno * 8]);
+
+ for (regno = 0; regno < 2; regno++)
+ regcache_raw_supply (regcache, regno + ARM_WCSSF_REGNUM,
+ ®buf[16 * 8 + regno * 4]);
+
+ for (regno = 0; regno < 4; regno++)
+ regcache_raw_supply (regcache, regno + ARM_WCGR0_REGNUM,
+ ®buf[16 * 8 + 2 * 4 + regno * 4]);
+}
+
+static void
+store_wmmx_regs (const struct regcache *regcache)
+{
+ char regbuf[IWMMXT_REGS_SIZE];
+ int ret, regno, tid;
+
+ /* Get the thread id for the ptrace call. */
+ tid = GET_THREAD_ID (inferior_ptid);
+
+ ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
+ if (ret < 0)
+ {
+ warning (_("Unable to fetch WMMX registers."));
+ return;
+ }
+
+ for (regno = 0; regno < 16; regno++)
+ if (regcache_valid_p (regcache, regno + ARM_WR0_REGNUM))
+ regcache_raw_collect (regcache, regno + ARM_WR0_REGNUM,
+ ®buf[regno * 8]);
+
+ for (regno = 0; regno < 2; regno++)
+ if (regcache_valid_p (regcache, regno + ARM_WCSSF_REGNUM))
+ regcache_raw_collect (regcache, regno + ARM_WCSSF_REGNUM,
+ ®buf[16 * 8 + regno * 4]);
+
+ for (regno = 0; regno < 4; regno++)
+ if (regcache_valid_p (regcache, regno + ARM_WCGR0_REGNUM))
+ regcache_raw_collect (regcache, regno + ARM_WCGR0_REGNUM,
+ ®buf[16 * 8 + 2 * 4 + regno * 4]);
+
+ ret = ptrace (PTRACE_SETWMMXREGS, tid, 0, regbuf);
+
+ if (ret < 0)
+ {
+ warning (_("Unable to store WMMX registers."));
+ return;
+ }
+}
+
+/* Fetch and store VFP Registers. The kernel object has space for 32
+ 64-bit registers, and the FPSCR. This is even when on a VFPv2 or
+ VFPv3D16 target. */
+#define VFP_REGS_SIZE (32 * 8 + 4)
+
+static void
+fetch_vfp_regs (struct regcache *regcache)
+{
+ char regbuf[VFP_REGS_SIZE];
+ int ret, regno, tid;
+
+ /* Get the thread id for the ptrace call. */
+ tid = GET_THREAD_ID (inferior_ptid);
+
+ ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf);
+ if (ret < 0)
+ {
+ warning (_("Unable to fetch VFP registers."));
+ return;
+ }
+
+ for (regno = 0; regno < arm_linux_vfp_register_count; regno++)
+ regcache_raw_supply (regcache, regno + ARM_D0_REGNUM,
+ (char *) regbuf + regno * 8);
+
+ regcache_raw_supply (regcache, ARM_FPSCR_REGNUM,
+ (char *) regbuf + 32 * 8);
+}
+
+static void
+store_vfp_regs (const struct regcache *regcache)
+{
+ char regbuf[VFP_REGS_SIZE];
+ int ret, regno, tid;
+
+ /* Get the thread id for the ptrace call. */
+ tid = GET_THREAD_ID (inferior_ptid);
+
+ ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf);
+ if (ret < 0)
+ {
+ warning (_("Unable to fetch VFP registers (for update)."));
+ return;
+ }
+
+ for (regno = 0; regno < arm_linux_vfp_register_count; regno++)
+ regcache_raw_collect (regcache, regno + ARM_D0_REGNUM,
+ (char *) regbuf + regno * 8);
+
+ regcache_raw_collect (regcache, ARM_FPSCR_REGNUM,
+ (char *) regbuf + 32 * 8);
+
+ ret = ptrace (PTRACE_SETVFPREGS, tid, 0, regbuf);
+
+ if (ret < 0)
+ {
+ warning (_("Unable to store VFP 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)
+arm_linux_fetch_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
{
if (-1 == regno)
{
- fetch_regs ();
- fetch_fpregs ();
+ fetch_regs (regcache);
+ fetch_fpregs (regcache);
+ if (arm_linux_has_wmmx_registers)
+ fetch_wmmx_regs (regcache);
+ if (arm_linux_vfp_register_count > 0)
+ fetch_vfp_regs (regcache);
}
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);
+ if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
+ fetch_register (regcache, regno);
+ else if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
+ fetch_fpregister (regcache, regno);
+ else if (arm_linux_has_wmmx_registers
+ && regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
+ fetch_wmmx_regs (regcache);
+ else if (arm_linux_vfp_register_count > 0
+ && regno >= ARM_D0_REGNUM
+ && regno <= ARM_D0_REGNUM + arm_linux_vfp_register_count)
+ fetch_vfp_regs (regcache);
}
}
point registers depending upon the value of regno. */
static void
-arm_linux_store_inferior_registers (int regno)
+arm_linux_store_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
{
if (-1 == regno)
{
- store_regs ();
- store_fpregs ();
+ store_regs (regcache);
+ store_fpregs (regcache);
+ if (arm_linux_has_wmmx_registers)
+ store_wmmx_regs (regcache);
+ if (arm_linux_vfp_register_count > 0)
+ store_vfp_regs (regcache);
}
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);
+ if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
+ store_register (regcache, regno);
+ else if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
+ store_fpregister (regcache, regno);
+ else if (arm_linux_has_wmmx_registers
+ && regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
+ store_wmmx_regs (regcache);
+ else if (arm_linux_vfp_register_count > 0
+ && regno >= ARM_D0_REGNUM
+ && regno <= ARM_D0_REGNUM + arm_linux_vfp_register_count)
+ store_vfp_regs (regcache);
}
}
thread debugging. */
void
-fill_gregset (gdb_gregset_t *gregsetp, int regno)
+fill_gregset (const struct regcache *regcache,
+ gdb_gregset_t *gregsetp, int regno)
{
- arm_linux_collect_gregset (NULL, current_regcache, regno, gregsetp, 0);
+ arm_linux_collect_gregset (NULL, regcache, regno, gregsetp, 0);
}
void
-supply_gregset (gdb_gregset_t *gregsetp)
+supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
{
- arm_linux_supply_gregset (NULL, current_regcache, -1, gregsetp, 0);
+ arm_linux_supply_gregset (NULL, regcache, -1, gregsetp, 0);
}
void
-fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
+fill_fpregset (const struct regcache *regcache,
+ gdb_fpregset_t *fpregsetp, int regno)
{
- arm_linux_collect_nwfpe (NULL, current_regcache, regno, fpregsetp, 0);
+ arm_linux_collect_nwfpe (NULL, regcache, regno, fpregsetp, 0);
}
/* Fill GDB's register array with the floating-point register values
in *fpregsetp. */
void
-supply_fpregset (gdb_fpregset_t *fpregsetp)
+supply_fpregset (struct regcache *regcache, const 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));
+ arm_linux_supply_nwfpe (NULL, regcache, -1, fpregsetp, 0);
}
/* Fetch the thread-local storage pointer for libthread_db. */
return ((*vmajor << 16) | (*vminor << 8) | *vrelease);
}
+static const struct target_desc *
+arm_linux_read_description (struct target_ops *ops)
+{
+ CORE_ADDR arm_hwcap = 0;
+ arm_linux_has_wmmx_registers = 0;
+ arm_linux_vfp_register_count = 0;
+
+ if (target_auxv_search (ops, AT_HWCAP, &arm_hwcap) != 1)
+ {
+ return NULL;
+ }
+
+ if (arm_hwcap & HWCAP_IWMMXT)
+ {
+ arm_linux_has_wmmx_registers = 1;
+ if (tdesc_arm_with_iwmmxt == NULL)
+ initialize_tdesc_arm_with_iwmmxt ();
+ return tdesc_arm_with_iwmmxt;
+ }
+
+ if (arm_hwcap & HWCAP_VFP)
+ {
+ int pid;
+ char *buf;
+ const struct target_desc * result = NULL;
+
+ /* NEON implies VFPv3-D32 or no-VFP unit. Say that we only support
+ Neon with VFPv3-D32. */
+ if (arm_hwcap & HWCAP_NEON)
+ {
+ arm_linux_vfp_register_count = 32;
+ if (tdesc_arm_with_neon == NULL)
+ initialize_tdesc_arm_with_neon ();
+ result = tdesc_arm_with_neon;
+ }
+ else if ((arm_hwcap & (HWCAP_VFPv3 | HWCAP_VFPv3D16)) == HWCAP_VFPv3)
+ {
+ arm_linux_vfp_register_count = 32;
+ if (tdesc_arm_with_vfpv3 == NULL)
+ initialize_tdesc_arm_with_vfpv3 ();
+ result = tdesc_arm_with_vfpv3;
+ }
+ else
+ {
+ arm_linux_vfp_register_count = 16;
+ if (tdesc_arm_with_vfpv2 == NULL)
+ initialize_tdesc_arm_with_vfpv2 ();
+ result = tdesc_arm_with_vfpv2;
+ }
+
+ /* Now make sure that the kernel supports reading these
+ registers. Support was added in 2.6.30. */
+ pid = GET_LWP (inferior_ptid);
+ errno = 0;
+ buf = alloca (VFP_REGS_SIZE);
+ if (ptrace (PTRACE_GETVFPREGS, pid, 0, buf) < 0
+ && errno == EIO)
+ result = NULL;
+
+ return result;
+ }
+
+ return NULL;
+}
+
void _initialize_arm_linux_nat (void);
void
t->to_fetch_registers = arm_linux_fetch_inferior_registers;
t->to_store_registers = arm_linux_store_inferior_registers;
+ t->to_read_description = arm_linux_read_description;
+
/* Register the target. */
linux_nat_add_target (t);
}
projects / deliverable / binutils-gdb.git / blobdiff