/* S390 native-dependent code for GDB, the GNU debugger.
- Copyright (C) 2001, 2003, 2004, 2005, 2006, 2007, 2009
- Free Software Foundation, Inc
+ Copyright (C) 2001-2013 Free Software Foundation, Inc.
Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
for IBM Deutschland Entwicklung GmbH, IBM Corporation.
#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>
#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. */
return;
}
- if (regno >= S390_R0_REGNUM && regno <= S390_R15_REGNUM)
+ if ((regno >= S390_R0_REGNUM && regno <= S390_R15_REGNUM)
+ || regno == S390_ORIG_R2_REGNUM)
offset += 4;
}
#endif
return;
}
- if (regno >= S390_R0_REGNUM && regno <= S390_R15_REGNUM)
+ if ((regno >= S390_R0_REGNUM && regno <= S390_R15_REGNUM)
+ || regno == S390_ORIG_R2_REGNUM)
{
memset (regp + offset, 0, 4);
offset += 4;
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
if (regnum == -1
|| (regnum < S390_NUM_REGS && regmap_fpregset[regnum] != -1))
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
if (regnum == -1
|| (regnum < S390_NUM_REGS && regmap_fpregset[regnum] != -1))
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);
}
}
static void
-s390_fix_watch_points (ptid_t ptid)
+s390_fix_watch_points (struct lwp_info *lp)
{
int tid;
CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0;
struct watch_area *area;
- tid = TIDGET (ptid);
+ tid = TIDGET (lp->ptid);
if (tid == 0)
- tid = PIDGET (ptid);
+ tid = PIDGET (lp->ptid);
for (area = watch_base; area; area = area->next)
{
watch_base = area;
ALL_LWPS (lp)
- s390_fix_watch_points (lp->ptid);
+ s390_fix_watch_points (lp);
return 0;
}
xfree (area);
ALL_LWPS (lp)
- s390_fix_watch_points (lp->ptid);
+ s390_fix_watch_points (lp);
return 0;
}
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);
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
gdb_byte *ptr = *readptr;
if (endptr == ptr)
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
that mode, report s390 architecture with 64-bit GPRs. */
if (s390_target_wordsize () == 8)
- return tdesc_s390x_linux64;
+ 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 tdesc_s390_linux64;
+ 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 tdesc_s390_linux32;
+ return (have_regset_system_call? tdesc_s390_linux32v2 :
+ have_regset_last_break? tdesc_s390_linux32v1 :
+ tdesc_s390_linux32);
}
void _initialize_s390_nat (void);
projects / deliverable / binutils-gdb.git / blobdiff