/* S390 native-dependent code for GDB, the GNU debugger.
- Copyright (C) 2001, 2003, 2004, 2005 Free Software Foundation, Inc
+ Copyright (C) 2001, 2003-2007, 2009, 2012 Free Software Foundation,
+ Inc.
Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
for IBM Deutschland Entwicklung GmbH, IBM Corporation.
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 "tm.h"
#include "regcache.h"
#include "inferior.h"
#include "target.h"
#include "linux-nat.h"
+#include "auxv.h"
+#include "gregset.h"
#include "s390-tdep.h"
+#include "elf/common.h"
#include <asm/ptrace.h>
#include <sys/ptrace.h>
#include <asm/types.h>
#include <sys/procfs.h>
#include <sys/ucontext.h>
+#include <elf.h>
+#ifndef HWCAP_S390_HIGH_GPRS
+#define HWCAP_S390_HIGH_GPRS 512
+#endif
+
+#ifndef PTRACE_GETREGSET
+#define PTRACE_GETREGSET 0x4204
+#endif
+
+#ifndef PTRACE_SETREGSET
+#define PTRACE_SETREGSET 0x4205
+#endif
+
+static int have_regset_last_break = 0;
+static int have_regset_system_call = 0;
/* Map registers to gregset/ptrace offsets.
These arrays are defined in s390-tdep.c. */
/* When debugging a 32-bit executable running under a 64-bit kernel,
we have to fix up the 64-bit registers we get from the kernel
to make them look like 32-bit registers. */
+
+static void
+s390_native_supply (struct regcache *regcache, int regno,
+ const gdb_byte *regp, int *regmap)
+{
+ int offset = regmap[regno];
+
#ifdef __s390x__
-#define SUBOFF(i) \
- ((TARGET_PTR_BIT == 32 \
- && ((i) == S390_PSWA_REGNUM \
- || ((i) >= S390_R0_REGNUM && (i) <= S390_R15_REGNUM)))? 4 : 0)
-#else
-#define SUBOFF(i) 0
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ if (offset != -1 && gdbarch_ptr_bit (gdbarch) == 32)
+ {
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
+ if (regno == S390_PSWM_REGNUM)
+ {
+ ULONGEST pswm;
+ gdb_byte buf[4];
+
+ pswm = extract_unsigned_integer (regp + regmap[S390_PSWM_REGNUM],
+ 8, byte_order);
+
+ store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000);
+ regcache_raw_supply (regcache, regno, buf);
+ return;
+ }
+
+ if (regno == S390_PSWA_REGNUM)
+ {
+ ULONGEST pswm, pswa;
+ gdb_byte buf[4];
+
+ pswa = extract_unsigned_integer (regp + regmap[S390_PSWA_REGNUM],
+ 8, byte_order);
+ pswm = extract_unsigned_integer (regp + regmap[S390_PSWM_REGNUM],
+ 8, byte_order);
+
+ store_unsigned_integer (buf, 4, byte_order,
+ (pswa & 0x7fffffff) | (pswm & 0x80000000));
+ regcache_raw_supply (regcache, regno, buf);
+ return;
+ }
+
+ if ((regno >= S390_R0_REGNUM && regno <= S390_R15_REGNUM)
+ || regno == S390_ORIG_R2_REGNUM)
+ offset += 4;
+ }
+#endif
+
+ if (offset != -1)
+ regcache_raw_supply (regcache, regno, regp + offset);
+}
+
+static void
+s390_native_collect (const struct regcache *regcache, int regno,
+ gdb_byte *regp, int *regmap)
+{
+ int offset = regmap[regno];
+
+#ifdef __s390x__
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ if (offset != -1 && gdbarch_ptr_bit (gdbarch) == 32)
+ {
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
+ if (regno == S390_PSWM_REGNUM)
+ {
+ ULONGEST pswm;
+ gdb_byte buf[4];
+
+ regcache_raw_collect (regcache, regno, buf);
+ pswm = extract_unsigned_integer (buf, 4, byte_order);
+
+ /* We don't know the final addressing mode until the PSW address
+ is known, so leave it as-is. When the PSW address is collected
+ (below), the addressing mode will be updated. */
+ store_unsigned_integer (regp + regmap[S390_PSWM_REGNUM],
+ 4, byte_order, pswm & 0xfff7ffff);
+ return;
+ }
+
+ if (regno == S390_PSWA_REGNUM)
+ {
+ ULONGEST pswa;
+ gdb_byte buf[4];
+
+ regcache_raw_collect (regcache, regno, buf);
+ pswa = extract_unsigned_integer (buf, 4, byte_order);
+
+ store_unsigned_integer (regp + regmap[S390_PSWA_REGNUM],
+ 8, byte_order, pswa & 0x7fffffff);
+
+ /* Update basic addressing mode bit in PSW mask, see above. */
+ store_unsigned_integer (regp + regmap[S390_PSWM_REGNUM] + 4,
+ 4, byte_order, pswa & 0x80000000);
+ return;
+ }
+
+ if ((regno >= S390_R0_REGNUM && regno <= S390_R15_REGNUM)
+ || regno == S390_ORIG_R2_REGNUM)
+ {
+ memset (regp + offset, 0, 4);
+ offset += 4;
+ }
+ }
#endif
+ if (offset != -1)
+ regcache_raw_collect (regcache, regno, regp + offset);
+}
/* Fill GDB's register array with the general-purpose register values
in *REGP. */
void
-supply_gregset (gregset_t *regp)
+supply_gregset (struct regcache *regcache, const gregset_t *regp)
{
int i;
for (i = 0; i < S390_NUM_REGS; i++)
- if (regmap_gregset[i] != -1)
- regcache_raw_supply (current_regcache, i,
- (char *)regp + regmap_gregset[i] + SUBOFF (i));
+ s390_native_supply (regcache, i, (const gdb_byte *) regp, regmap_gregset);
}
/* Fill register REGNO (if it is a general-purpose register) in
*REGP with the value in GDB's register array. If REGNO is -1,
do this for all registers. */
void
-fill_gregset (gregset_t *regp, int regno)
+fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno)
{
int i;
for (i = 0; i < S390_NUM_REGS; i++)
- if (regmap_gregset[i] != -1)
- if (regno == -1 || regno == i)
- regcache_raw_collect (current_regcache, i,
- (char *)regp + regmap_gregset[i] + SUBOFF (i));
+ if (regno == -1 || regno == i)
+ s390_native_collect (regcache, i, (gdb_byte *) regp, regmap_gregset);
}
/* Fill GDB's register array with the floating-point register values
in *REGP. */
void
-supply_fpregset (fpregset_t *regp)
+supply_fpregset (struct regcache *regcache, const fpregset_t *regp)
{
int i;
for (i = 0; i < S390_NUM_REGS; i++)
- if (regmap_fpregset[i] != -1)
- regcache_raw_supply (current_regcache, i,
- ((char *)regp) + regmap_fpregset[i]);
+ s390_native_supply (regcache, i, (const gdb_byte *) regp, regmap_fpregset);
}
/* Fill register REGNO (if it is a general-purpose register) in
*REGP with the value in GDB's register array. If REGNO is -1,
do this for all registers. */
void
-fill_fpregset (fpregset_t *regp, int regno)
+fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno)
{
int i;
for (i = 0; i < S390_NUM_REGS; i++)
- if (regmap_fpregset[i] != -1)
- if (regno == -1 || regno == i)
- regcache_raw_collect (current_regcache, i,
- ((char *)regp) + regmap_fpregset[i]);
+ if (regno == -1 || regno == i)
+ s390_native_collect (regcache, i, (gdb_byte *) regp, regmap_fpregset);
}
/* Find the TID for the current inferior thread to use with ptrace. */
/* Fetch all general-purpose registers from process/thread TID and
store their values in GDB's register cache. */
static void
-fetch_regs (int tid)
+fetch_regs (struct regcache *regcache, int tid)
{
gregset_t regs;
ptrace_area parea;
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't get registers"));
- supply_gregset (®s);
+ supply_gregset (regcache, (const gregset_t *) ®s);
}
/* Store all valid general-purpose registers in GDB's register cache
into the process/thread specified by TID. */
static void
-store_regs (int tid, int regnum)
+store_regs (const struct regcache *regcache, int tid, int regnum)
{
gregset_t regs;
ptrace_area parea;
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't get registers"));
- fill_gregset (®s, regnum);
+ fill_gregset (regcache, ®s, regnum);
if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't write registers"));
/* Fetch all floating-point registers from process/thread TID and store
their values in GDB's register cache. */
static void
-fetch_fpregs (int tid)
+fetch_fpregs (struct regcache *regcache, int tid)
{
fpregset_t fpregs;
ptrace_area parea;
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't get floating point status"));
- supply_fpregset (&fpregs);
+ supply_fpregset (regcache, (const fpregset_t *) &fpregs);
}
/* Store all valid floating-point registers in GDB's register cache
into the process/thread specified by TID. */
static void
-store_fpregs (int tid, int regnum)
+store_fpregs (const struct regcache *regcache, int tid, int regnum)
{
fpregset_t fpregs;
ptrace_area parea;
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't get floating point status"));
- fill_fpregset (&fpregs, regnum);
+ fill_fpregset (regcache, &fpregs, regnum);
if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't write floating point status"));
}
+/* Fetch all registers in the kernel's register set whose number is REGSET,
+ whose size is REGSIZE, and whose layout is described by REGMAP, from
+ process/thread TID and store their values in GDB's register cache. */
+static void
+fetch_regset (struct regcache *regcache, int tid,
+ int regset, int regsize, int *regmap)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ gdb_byte *buf = alloca (regsize);
+ struct iovec iov;
+ int i;
+
+ iov.iov_base = buf;
+ iov.iov_len = regsize;
+
+ if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) < 0)
+ perror_with_name (_("Couldn't get register set"));
+
+ for (i = 0; i < S390_NUM_REGS; i++)
+ s390_native_supply (regcache, i, buf, regmap);
+}
+
+/* Store all registers in the kernel's register set whose number is REGSET,
+ whose size is REGSIZE, and whose layout is described by REGMAP, from
+ GDB's register cache back to process/thread TID. */
+static void
+store_regset (struct regcache *regcache, int tid,
+ int regset, int regsize, int *regmap)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ gdb_byte *buf = alloca (regsize);
+ struct iovec iov;
+ int i;
+
+ iov.iov_base = buf;
+ iov.iov_len = regsize;
+
+ if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) < 0)
+ perror_with_name (_("Couldn't get register set"));
+
+ for (i = 0; i < S390_NUM_REGS; i++)
+ s390_native_collect (regcache, i, buf, regmap);
+
+ if (ptrace (PTRACE_SETREGSET, tid, (long) regset, (long) &iov) < 0)
+ perror_with_name (_("Couldn't set register set"));
+}
+
+/* Check whether the kernel provides a register set with number REGSET
+ of size REGSIZE for process/thread TID. */
+static int
+check_regset (int tid, int regset, int regsize)
+{
+ gdb_byte *buf = alloca (regsize);
+ struct iovec iov;
+
+ iov.iov_base = buf;
+ iov.iov_len = regsize;
+
+ if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) < 0)
+ return 0;
+ else
+ return 1;
+}
+
/* Fetch register REGNUM from the child process. If REGNUM is -1, do
this for all registers. */
static void
-s390_linux_fetch_inferior_registers (int regnum)
+s390_linux_fetch_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
{
int tid = s390_inferior_tid ();
if (regnum == -1
|| (regnum < S390_NUM_REGS && regmap_gregset[regnum] != -1))
- fetch_regs (tid);
+ fetch_regs (regcache, tid);
if (regnum == -1
|| (regnum < S390_NUM_REGS && regmap_fpregset[regnum] != -1))
- fetch_fpregs (tid);
+ fetch_fpregs (regcache, tid);
+
+ if (have_regset_last_break)
+ if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM)
+ fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8,
+ (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32
+ ? s390_regmap_last_break : s390x_regmap_last_break));
+
+ if (have_regset_system_call)
+ if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM)
+ fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4,
+ s390_regmap_system_call);
}
/* Store register REGNUM back into the child process. If REGNUM is
-1, do this for all registers. */
static void
-s390_linux_store_inferior_registers (int regnum)
+s390_linux_store_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
{
int tid = s390_inferior_tid ();
if (regnum == -1
|| (regnum < S390_NUM_REGS && regmap_gregset[regnum] != -1))
- store_regs (tid, regnum);
+ store_regs (regcache, tid, regnum);
if (regnum == -1
|| (regnum < S390_NUM_REGS && regmap_fpregset[regnum] != -1))
- store_fpregs (tid, regnum);
+ store_fpregs (regcache, tid, regnum);
+
+ /* S390_LAST_BREAK_REGNUM is read-only. */
+
+ if (have_regset_system_call)
+ if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM)
+ store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4,
+ s390_regmap_system_call);
}
{
per_lowcore_bits per_lowcore;
ptrace_area parea;
+ int result;
/* Speed up common case. */
if (!watch_base)
if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea) < 0)
perror_with_name (_("Couldn't retrieve watchpoint status"));
- return per_lowcore.perc_storage_alteration == 1
- && per_lowcore.perc_store_real_address == 0;
+ result = (per_lowcore.perc_storage_alteration == 1
+ && per_lowcore.perc_store_real_address == 0);
+
+ if (result)
+ {
+ /* Do not report this watchpoint again. */
+ memset (&per_lowcore, 0, sizeof (per_lowcore));
+ if (ptrace (PTRACE_POKEUSR_AREA, s390_inferior_tid (), &parea) < 0)
+ perror_with_name (_("Couldn't clear watchpoint status"));
+ }
+
+ return result;
}
static void
-s390_fix_watch_points (void)
+s390_fix_watch_points (struct lwp_info *lp)
{
- int tid = s390_inferior_tid ();
+ int tid;
per_struct per_info;
ptrace_area parea;
CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0;
struct watch_area *area;
+ tid = TIDGET (lp->ptid);
+ if (tid == 0)
+ tid = PIDGET (lp->ptid);
+
for (area = watch_base; area; area = area->next)
{
watch_lo_addr = min (watch_lo_addr, area->lo_addr);
}
static int
-s390_insert_watchpoint (CORE_ADDR addr, int len)
+s390_insert_watchpoint (CORE_ADDR addr, int len, int type,
+ struct expression *cond)
{
+ struct lwp_info *lp;
struct watch_area *area = xmalloc (sizeof (struct watch_area));
+
if (!area)
return -1;
area->next = watch_base;
watch_base = area;
- s390_fix_watch_points ();
+ ALL_LWPS (lp)
+ s390_fix_watch_points (lp);
return 0;
}
static int
-s390_remove_watchpoint (CORE_ADDR addr, int len)
+s390_remove_watchpoint (CORE_ADDR addr, int len, int type,
+ struct expression *cond)
{
+ struct lwp_info *lp;
struct watch_area *area, **parea;
for (parea = &watch_base; *parea; parea = &(*parea)->next)
*parea = area->next;
xfree (area);
- s390_fix_watch_points ();
+ ALL_LWPS (lp)
+ s390_fix_watch_points (lp);
return 0;
}
static int
s390_can_use_hw_breakpoint (int type, int cnt, int othertype)
+{
+ return type == bp_hardware_watchpoint;
+}
+
+static int
+s390_region_ok_for_hw_watchpoint (CORE_ADDR addr, int cnt)
{
return 1;
}
static int
-s390_region_size_ok_for_hw_watchpoint (int cnt)
+s390_target_wordsize (void)
+{
+ int wordsize = 4;
+
+ /* Check for 64-bit inferior process. This is the case when the host is
+ 64-bit, and in addition bit 32 of the PSW mask is set. */
+#ifdef __s390x__
+ long pswm;
+
+ errno = 0;
+ pswm = (long) ptrace (PTRACE_PEEKUSER, s390_inferior_tid (), PT_PSWMASK, 0);
+ if (errno == 0 && (pswm & 0x100000000ul) != 0)
+ wordsize = 8;
+#endif
+
+ return wordsize;
+}
+
+static int
+s390_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
+ gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
{
+ int sizeof_auxv_field = s390_target_wordsize ();
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
+ gdb_byte *ptr = *readptr;
+
+ if (endptr == ptr)
+ return 0;
+
+ if (endptr - ptr < sizeof_auxv_field * 2)
+ return -1;
+
+ *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order);
+ ptr += sizeof_auxv_field;
+ *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order);
+ ptr += sizeof_auxv_field;
+
+ *readptr = ptr;
return 1;
}
+#ifdef __s390x__
+static unsigned long
+s390_get_hwcap (void)
+{
+ CORE_ADDR field;
+
+ if (target_auxv_search (¤t_target, AT_HWCAP, &field))
+ return (unsigned long) field;
+
+ return 0;
+}
+#endif
+
+static const struct target_desc *
+s390_read_description (struct target_ops *ops)
+{
+ int tid = s390_inferior_tid ();
+
+ have_regset_last_break
+ = check_regset (tid, NT_S390_LAST_BREAK, 8);
+ have_regset_system_call
+ = check_regset (tid, NT_S390_SYSTEM_CALL, 4);
+
+#ifdef __s390x__
+ /* If GDB itself is compiled as 64-bit, we are running on a machine in
+ z/Architecture mode. If the target is running in 64-bit addressing
+ mode, report s390x architecture. If the target is running in 31-bit
+ addressing mode, but the kernel supports using 64-bit registers in
+ that mode, report s390 architecture with 64-bit GPRs. */
+
+ if (s390_target_wordsize () == 8)
+ return (have_regset_system_call? tdesc_s390x_linux64v2 :
+ have_regset_last_break? tdesc_s390x_linux64v1 :
+ tdesc_s390x_linux64);
+
+ if (s390_get_hwcap () & HWCAP_S390_HIGH_GPRS)
+ return (have_regset_system_call? tdesc_s390_linux64v2 :
+ have_regset_last_break? tdesc_s390_linux64v1 :
+ tdesc_s390_linux64);
+#endif
+
+ /* If GDB itself is compiled as 31-bit, or if we're running a 31-bit inferior
+ on a 64-bit kernel that does not support using 64-bit registers in 31-bit
+ mode, report s390 architecture with 32-bit GPRs. */
+ return (have_regset_system_call? tdesc_s390_linux32v2 :
+ have_regset_last_break? tdesc_s390_linux32v1 :
+ tdesc_s390_linux32);
+}
void _initialize_s390_nat (void);
/* Add our watchpoint methods. */
t->to_can_use_hw_breakpoint = s390_can_use_hw_breakpoint;
- t->to_region_size_ok_for_hw_watchpoint = s390_region_size_ok_for_hw_watchpoint;
+ t->to_region_ok_for_hw_watchpoint = s390_region_ok_for_hw_watchpoint;
t->to_have_continuable_watchpoint = 1;
t->to_stopped_by_watchpoint = s390_stopped_by_watchpoint;
t->to_insert_watchpoint = s390_insert_watchpoint;
t->to_remove_watchpoint = s390_remove_watchpoint;
+ /* Detect target architecture. */
+ t->to_read_description = s390_read_description;
+ t->to_auxv_parse = s390_auxv_parse;
+
/* Register the target. */
- add_target (t);
+ linux_nat_add_target (t);
+ linux_nat_set_new_thread (t, s390_fix_watch_points);
}
projects / deliverable / binutils-gdb.git / blobdiff