/* S390 native-dependent code for GDB, the GNU debugger.
- Copyright (C) 2001-2014 Free Software Foundation, Inc.
+ Copyright (C) 2001-2015 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 "linux-nat.h"
#include "auxv.h"
#include "gregset.h"
+#include "regset.h"
#include "s390-linux-tdep.h"
#include "elf/common.h"
static int have_regset_system_call = 0;
static int have_regset_tdb = 0;
-/* Map registers to gregset/ptrace offsets.
- These arrays are defined in s390-tdep.c. */
+/* Register map for 32-bit executables running under a 64-bit
+ kernel. */
#ifdef __s390x__
-#define regmap_gregset s390x_regmap_gregset
-#else
-#define regmap_gregset s390_regmap_gregset
+static const struct regcache_map_entry s390_64_regmap_gregset[] =
+ {
+ /* Skip PSWM and PSWA, since they must be handled specially. */
+ { 2, REGCACHE_MAP_SKIP, 8 },
+ { 1, S390_R0_UPPER_REGNUM, 4 }, { 1, S390_R0_REGNUM, 4 },
+ { 1, S390_R1_UPPER_REGNUM, 4 }, { 1, S390_R1_REGNUM, 4 },
+ { 1, S390_R2_UPPER_REGNUM, 4 }, { 1, S390_R2_REGNUM, 4 },
+ { 1, S390_R3_UPPER_REGNUM, 4 }, { 1, S390_R3_REGNUM, 4 },
+ { 1, S390_R4_UPPER_REGNUM, 4 }, { 1, S390_R4_REGNUM, 4 },
+ { 1, S390_R5_UPPER_REGNUM, 4 }, { 1, S390_R5_REGNUM, 4 },
+ { 1, S390_R6_UPPER_REGNUM, 4 }, { 1, S390_R6_REGNUM, 4 },
+ { 1, S390_R7_UPPER_REGNUM, 4 }, { 1, S390_R7_REGNUM, 4 },
+ { 1, S390_R8_UPPER_REGNUM, 4 }, { 1, S390_R8_REGNUM, 4 },
+ { 1, S390_R9_UPPER_REGNUM, 4 }, { 1, S390_R9_REGNUM, 4 },
+ { 1, S390_R10_UPPER_REGNUM, 4 }, { 1, S390_R10_REGNUM, 4 },
+ { 1, S390_R11_UPPER_REGNUM, 4 }, { 1, S390_R11_REGNUM, 4 },
+ { 1, S390_R12_UPPER_REGNUM, 4 }, { 1, S390_R12_REGNUM, 4 },
+ { 1, S390_R13_UPPER_REGNUM, 4 }, { 1, S390_R13_REGNUM, 4 },
+ { 1, S390_R14_UPPER_REGNUM, 4 }, { 1, S390_R14_REGNUM, 4 },
+ { 1, S390_R15_UPPER_REGNUM, 4 }, { 1, S390_R15_REGNUM, 4 },
+ { 16, S390_A0_REGNUM, 4 },
+ { 1, REGCACHE_MAP_SKIP, 4 }, { 1, S390_ORIG_R2_REGNUM, 4 },
+ { 0 }
+ };
+
+static const struct regset s390_64_gregset =
+ {
+ s390_64_regmap_gregset,
+ regcache_supply_regset,
+ regcache_collect_regset
+ };
+
+#define S390_PSWM_OFFSET 0
+#define S390_PSWA_OFFSET 8
#endif
-#define regmap_fpregset s390_regmap_fpregset
-
-/* Fill the regset described by MAP into REGCACHE, using the values
- from REGP. The MAP array represents each register as a pair
- (offset, regno) of short integers and is terminated with -1. */
-
-static void
-s390_native_supply (struct regcache *regcache, const short *map,
- const gdb_byte *regp)
-{
- for (; map[0] >= 0; map += 2)
- regcache_raw_supply (regcache, map[1], regp ? regp + map[0] : NULL);
-}
-
-/* Collect the register REGNO out of the regset described by MAP from
- REGCACHE into REGP. If REGNO == -1, do this for all registers in
- this regset. */
-
-static void
-s390_native_collect (const struct regcache *regcache, const short *map,
- int regno, gdb_byte *regp)
-{
- for (; map[0] >= 0; map += 2)
- if (regno == -1 || regno == map[1])
- regcache_raw_collect (regcache, map[1], regp + map[0]);
-}
-
/* Fill GDB's register array with the general-purpose register values
in *REGP.
if (gdbarch_ptr_bit (gdbarch) == 32)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- ULONGEST pswm = 0, pswa = 0;
+ ULONGEST pswm, pswa;
gdb_byte buf[4];
- const short *map;
-
- for (map = regmap_gregset; map[0] >= 0; map += 2)
- {
- const gdb_byte *p = (const gdb_byte *) regp + map[0];
- int regno = map[1];
-
- if (regno == S390_PSWM_REGNUM)
- pswm = extract_unsigned_integer (p, 8, byte_order);
- else if (regno == S390_PSWA_REGNUM)
- pswa = extract_unsigned_integer (p, 8, byte_order);
- else
- {
- if ((regno >= S390_R0_REGNUM && regno <= S390_R15_REGNUM)
- || regno == S390_ORIG_R2_REGNUM)
- p += 4;
- regcache_raw_supply (regcache, regno, p);
- }
- }
+ regcache_supply_regset (&s390_64_gregset, regcache, -1,
+ regp, sizeof (gregset_t));
+ pswm = extract_unsigned_integer ((const gdb_byte *) regp
+ + S390_PSWM_OFFSET, 8, byte_order);
+ pswa = extract_unsigned_integer ((const gdb_byte *) regp
+ + S390_PSWA_OFFSET, 8, byte_order);
store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000);
regcache_raw_supply (regcache, S390_PSWM_REGNUM, buf);
store_unsigned_integer (buf, 4, byte_order,
}
#endif
- s390_native_supply (regcache, regmap_gregset, (const gdb_byte *) regp);
+ regcache_supply_regset (&s390_gregset, regcache, -1, regp,
+ sizeof (gregset_t));
}
/* Fill register REGNO (if it is a general-purpose register) in
struct gdbarch *gdbarch = get_regcache_arch (regcache);
if (gdbarch_ptr_bit (gdbarch) == 32)
{
- gdb_byte *psw_p[2];
- const short *map;
-
- for (map = regmap_gregset; map[0] >= 0; map += 2)
- {
- gdb_byte *p = (gdb_byte *) regp + map[0];
- int reg = map[1];
-
- if (reg >= S390_PSWM_REGNUM && reg <= S390_PSWA_REGNUM)
- psw_p[reg - S390_PSWM_REGNUM] = p;
-
- else if (regno == -1 || regno == reg)
- {
- if ((reg >= S390_R0_REGNUM && reg <= S390_R15_REGNUM)
- || reg == S390_ORIG_R2_REGNUM)
- {
- memset (p, 0, 4);
- p += 4;
- }
- regcache_raw_collect (regcache, reg, p);
- }
- }
+ regcache_collect_regset (&s390_64_gregset, regcache, regno,
+ regp, sizeof (gregset_t));
if (regno == -1
|| regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM)
pswa = extract_unsigned_integer (buf, 4, byte_order);
if (regno == -1 || regno == S390_PSWM_REGNUM)
- store_unsigned_integer (psw_p[0], 8, byte_order,
- ((pswm & 0xfff7ffff) << 32) |
+ store_unsigned_integer ((gdb_byte *) regp + S390_PSWM_OFFSET, 8,
+ byte_order, ((pswm & 0xfff7ffff) << 32) |
(pswa & 0x80000000));
if (regno == -1 || regno == S390_PSWA_REGNUM)
- store_unsigned_integer (psw_p[1], 8, byte_order,
- pswa & 0x7fffffff);
+ store_unsigned_integer ((gdb_byte *) regp + S390_PSWA_OFFSET, 8,
+ byte_order, pswa & 0x7fffffff);
}
return;
}
#endif
- s390_native_collect (regcache, regmap_gregset, regno, (gdb_byte *) regp);
+ regcache_collect_regset (&s390_gregset, regcache, regno, regp,
+ sizeof (gregset_t));
}
/* Fill GDB's register array with the floating-point register values
void
supply_fpregset (struct regcache *regcache, const fpregset_t *regp)
{
- s390_native_supply (regcache, regmap_fpregset, (const gdb_byte *) regp);
+ regcache_supply_regset (&s390_fpregset, regcache, -1, regp,
+ sizeof (fpregset_t));
}
/* Fill register REGNO (if it is a general-purpose register) in
void
fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno)
{
- s390_native_collect (regcache, regmap_fpregset, regno, (gdb_byte *) regp);
+ regcache_collect_regset (&s390_fpregset, regcache, regno, regp,
+ sizeof (fpregset_t));
}
/* Find the TID for the current inferior thread to use with ptrace. */
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. */
+/* Fetch all registers in the kernel's register set whose number is
+ REGSET_ID, whose size is REGSIZE, and whose layout is described by
+ REGSET, 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, const short *regmap)
+ int regset_id, int regsize, const struct regset *regset)
{
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)
+ if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0)
{
if (errno == ENODATA)
- s390_native_supply (regcache, regmap, NULL);
+ regcache_supply_regset (regset, regcache, -1, NULL, regsize);
else
perror_with_name (_("Couldn't get register set"));
}
else
- s390_native_supply (regcache, regmap, buf);
+ regcache_supply_regset (regset, regcache, -1, buf, regsize);
}
-/* 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. */
+/* Store all registers in the kernel's register set whose number is
+ REGSET_ID, whose size is REGSIZE, and whose layout is described by
+ REGSET, from GDB's register cache back to process/thread TID. */
static void
store_regset (struct regcache *regcache, int tid,
- int regset, int regsize, const short *regmap)
+ int regset_id, int regsize, const struct regset *regset)
{
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)
+ if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0)
perror_with_name (_("Couldn't get register set"));
- s390_native_collect (regcache, regmap, -1, buf);
+ regcache_collect_regset (regset, regcache, -1, buf, regsize);
- if (ptrace (PTRACE_SETREGSET, tid, (long) regset, (long) &iov) < 0)
+ if (ptrace (PTRACE_SETREGSET, tid, (long) regset_id, (long) &iov) < 0)
perror_with_name (_("Couldn't set register set"));
}
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));
+ ? &s390_last_break_regset : &s390x_last_break_regset));
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);
+ &s390_system_call_regset);
if (have_regset_tdb)
if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum))
fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset,
- s390_regmap_tdb);
+ &s390_tdb_regset);
}
/* Store register REGNUM back into the child process. If REGNUM is
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);
+ &s390_system_call_regset);
}
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