/* S390 native-dependent code for GDB, the GNU debugger.
- Copyright (C) 2001-2016 Free Software Foundation, Inc.
+ Copyright (C) 2001-2018 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 "nat/linux-ptrace.h"
#include "gdbcmd.h"
+#include "s390-tdep.h"
#include "s390-linux-tdep.h"
#include "elf/common.h"
#include <sys/procfs.h>
#include <sys/ucontext.h>
#include <elf.h>
+#include <algorithm>
+#include "inf-ptrace.h"
/* Per-thread arch-specific data. */
static int have_regset_system_call = 0;
static int have_regset_tdb = 0;
static int have_regset_vxrs = 0;
+static int have_regset_gs = 0;
/* Register map for 32-bit executables running under a 64-bit
kernel. */
#define PER_CONTROL_SUSPENSION PER_BIT (41)
#define PER_CONTROL_ALTERATION PER_BIT (42)
+class s390_linux_nat_target final : public linux_nat_target
+{
+public:
+ /* Add our register access methods. */
+ void fetch_registers (struct regcache *, int) override;
+ void store_registers (struct regcache *, int) override;
+
+ /* Add our watchpoint methods. */
+ int can_use_hw_breakpoint (enum bptype, int, int) override;
+ int insert_hw_breakpoint (struct gdbarch *, struct bp_target_info *)
+ override;
+ int remove_hw_breakpoint (struct gdbarch *, struct bp_target_info *)
+ override;
+ int region_ok_for_hw_watchpoint (CORE_ADDR, int) override;
+ bool have_continuable_watchpoint () override { return true; }
+ bool stopped_by_watchpoint () override;
+ int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
+ struct expression *) override;
+ int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
+ struct expression *) override;
+
+ /* Detect target architecture. */
+ const struct target_desc *read_description () override;
+ int auxv_parse (gdb_byte **readptr,
+ gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
+ override;
+
+ /* Override linux_nat_target low methods. */
+ void low_new_thread (struct lwp_info *lp) override;
+ void low_delete_thread (struct arch_lwp_info *lp) override;
+ void low_prepare_to_resume (struct lwp_info *lp) override;
+ void low_new_fork (struct lwp_info *parent, pid_t child_pid) override;
+ void low_forget_process (pid_t pid) override;
+};
+
+static s390_linux_nat_target the_s390_linux_nat_target;
/* Fill GDB's register array with the general-purpose register values
in *REGP.
supply_gregset (struct regcache *regcache, const gregset_t *regp)
{
#ifdef __s390x__
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
if (gdbarch_ptr_bit (gdbarch) == 32)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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);
+ regcache->raw_supply (S390_PSWM_REGNUM, buf);
store_unsigned_integer (buf, 4, byte_order,
(pswa & 0x7fffffff) | (pswm & 0x80000000));
- regcache_raw_supply (regcache, S390_PSWA_REGNUM, buf);
+ regcache->raw_supply (S390_PSWA_REGNUM, buf);
return;
}
#endif
fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno)
{
#ifdef __s390x__
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
if (gdbarch_ptr_bit (gdbarch) == 32)
{
regcache_collect_regset (&s390_64_gregset, regcache, regno,
if (regno == -1 || regno == S390_PSWM_REGNUM)
{
pswm &= 0x80000000;
- regcache_raw_collect (regcache, S390_PSWM_REGNUM, buf);
+ regcache->raw_collect (S390_PSWM_REGNUM, buf);
pswm |= (extract_unsigned_integer (buf, 4, byte_order)
& 0xfff7ffff) << 32;
}
if (regno == -1 || regno == S390_PSWA_REGNUM)
{
- regcache_raw_collect (regcache, S390_PSWA_REGNUM, buf);
+ regcache->raw_collect (S390_PSWA_REGNUM, buf);
pswa = extract_unsigned_integer (buf, 4, byte_order);
pswm ^= (pswm ^ pswa) & 0x80000000;
pswa &= 0x7fffffff;
/* Fetch register REGNUM from the child process. If REGNUM is -1, do
this for all registers. */
-static void
-s390_linux_fetch_inferior_registers (struct target_ops *ops,
- struct regcache *regcache, int regnum)
+void
+s390_linux_nat_target::fetch_registers (struct regcache *regcache, int regnum)
{
- int tid = s390_inferior_tid ();
+ pid_t tid = get_ptrace_pid (regcache->ptid ());
if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum))
fetch_regs (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
+ (gdbarch_ptr_bit (regcache->arch ()) == 32
? &s390_last_break_regset : &s390x_last_break_regset));
if (have_regset_system_call)
fetch_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16,
&s390_vxrs_high_regset);
}
+
+ if (have_regset_gs)
+ {
+ if (regnum == -1 || (regnum >= S390_GSD_REGNUM
+ && regnum <= S390_GSEPLA_REGNUM))
+ fetch_regset (regcache, tid, NT_S390_GS_CB, 4 * 8,
+ &s390_gs_regset);
+ if (regnum == -1 || (regnum >= S390_BC_GSD_REGNUM
+ && regnum <= S390_BC_GSEPLA_REGNUM))
+ fetch_regset (regcache, tid, NT_S390_GS_BC, 4 * 8,
+ &s390_gsbc_regset);
+ }
}
/* Store register REGNUM back into the child process. If REGNUM is
-1, do this for all registers. */
-static void
-s390_linux_store_inferior_registers (struct target_ops *ops,
- struct regcache *regcache, int regnum)
+void
+s390_linux_nat_target::store_registers (struct regcache *regcache, int regnum)
{
- int tid = s390_inferior_tid ();
+ pid_t tid = get_ptrace_pid (regcache->ptid ());
if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum))
store_regs (regcache, tid, regnum);
/* Called whenever GDB is no longer debugging process PID. It deletes
data structures that keep track of hardware debug state. */
-static void
-s390_forget_process (pid_t pid)
+void
+s390_linux_nat_target::low_forget_process (pid_t pid)
{
struct s390_process_info *proc, **proc_link;
/* linux_nat_new_fork hook. */
-static void
-s390_linux_new_fork (struct lwp_info *parent, pid_t child_pid)
+void
+s390_linux_nat_target::low_new_fork (struct lwp_info *parent, pid_t child_pid)
{
pid_t parent_pid;
struct s390_debug_reg_state *parent_state;
per_info.lowcore.words.access_id);
}
-static int
-s390_stopped_by_watchpoint (struct target_ops *ops)
+bool
+s390_linux_nat_target::stopped_by_watchpoint ()
{
struct s390_debug_reg_state *state
= s390_get_debug_reg_state (ptid_get_pid (inferior_ptid));
per_lowcore_bits per_lowcore;
ptrace_area parea;
- int result;
if (show_debug_regs)
s390_show_debug_regs (s390_inferior_tid (), "stop");
/* Speed up common case. */
if (VEC_empty (s390_watch_area, state->watch_areas))
- return 0;
+ return false;
parea.len = sizeof (per_lowcore);
parea.process_addr = (addr_t) & per_lowcore;
if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea, 0) < 0)
perror_with_name (_("Couldn't retrieve watchpoint status"));
- result = (per_lowcore.perc_storage_alteration == 1
- && per_lowcore.perc_store_real_address == 0);
+ bool result = (per_lowcore.perc_storage_alteration == 1
+ && per_lowcore.perc_store_real_address == 0);
if (result)
{
/* Each time before resuming a thread, update its PER info. */
-static void
-s390_prepare_to_resume (struct lwp_info *lp)
+void
+s390_linux_nat_target::low_prepare_to_resume (struct lwp_info *lp)
{
int tid;
pid_t pid = ptid_get_pid (ptid_of_lwp (lp));
/* When attaching to a new thread, mark its PER info as changed. */
-static void
-s390_new_thread (struct lwp_info *lp)
+void
+s390_linux_nat_target::low_new_thread (struct lwp_info *lp)
{
s390_mark_per_info_changed (lp);
}
+/* Function to call when a thread is being deleted. */
+
+void
+s390_linux_nat_target::low_delete_thread (struct arch_lwp_info *arch_lwp)
+{
+ xfree (arch_lwp);
+}
+
/* Iterator callback for s390_refresh_per_info. */
static int
return 0;
}
-static int
-s390_insert_watchpoint (struct target_ops *self,
- CORE_ADDR addr, int len, enum target_hw_bp_type type,
- struct expression *cond)
+int
+s390_linux_nat_target::insert_watchpoint (CORE_ADDR addr, int len,
+ enum target_hw_bp_type type,
+ struct expression *cond)
{
s390_watch_area area;
struct s390_debug_reg_state *state
return s390_refresh_per_info ();
}
-static int
-s390_remove_watchpoint (struct target_ops *self,
- CORE_ADDR addr, int len, enum target_hw_bp_type type,
- struct expression *cond)
+int
+s390_linux_nat_target::remove_watchpoint (CORE_ADDR addr, int len,
+ enum target_hw_bp_type type,
+ struct expression *cond)
{
unsigned ix;
s390_watch_area *area;
/* Implement the "can_use_hw_breakpoint" target_ops method. */
-static int
-s390_can_use_hw_breakpoint (struct target_ops *self,
- enum bptype type, int cnt, int othertype)
+int
+s390_linux_nat_target::can_use_hw_breakpoint (enum bptype type,
+ int cnt, int othertype)
{
if (type == bp_hardware_watchpoint || type == bp_hardware_breakpoint)
return 1;
/* Implement the "insert_hw_breakpoint" target_ops method. */
-static int
-s390_insert_hw_breakpoint (struct target_ops *self,
- struct gdbarch *gdbarch,
- struct bp_target_info *bp_tgt)
+int
+s390_linux_nat_target::insert_hw_breakpoint (struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt)
{
s390_watch_area area;
struct s390_debug_reg_state *state;
/* Implement the "remove_hw_breakpoint" target_ops method. */
-static int
-s390_remove_hw_breakpoint (struct target_ops *self,
- struct gdbarch *gdbarch,
- struct bp_target_info *bp_tgt)
+int
+s390_linux_nat_target::remove_hw_breakpoint (struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt)
{
unsigned ix;
struct watch_area *area;
return -1;
}
-static int
-s390_region_ok_for_hw_watchpoint (struct target_ops *self,
- CORE_ADDR addr, int cnt)
+int
+s390_linux_nat_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int cnt)
{
return 1;
}
return wordsize;
}
-static int
-s390_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
- gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
+int
+s390_linux_nat_target::auxv_parse (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 ());
return 1;
}
-static const struct target_desc *
-s390_read_description (struct target_ops *ops)
+const struct target_desc *
+s390_linux_nat_target::read_description ()
{
int tid = s390_inferior_tid ();
{
CORE_ADDR hwcap = 0;
- target_auxv_search (¤t_target, AT_HWCAP, &hwcap);
+ target_auxv_search (current_top_target (), AT_HWCAP, &hwcap);
have_regset_tdb = (hwcap & HWCAP_S390_TE)
&& check_regset (tid, NT_S390_TDB, s390_sizeof_tdbregset);
&& check_regset (tid, NT_S390_VXRS_LOW, 16 * 8)
&& check_regset (tid, NT_S390_VXRS_HIGH, 16 * 16);
+ have_regset_gs = (hwcap & HWCAP_S390_GS)
+ && check_regset (tid, NT_S390_GS_CB, 4 * 8)
+ && check_regset (tid, NT_S390_GS_BC, 4 * 8);
+
if (s390_target_wordsize () == 8)
- return (have_regset_vxrs ?
+ return (have_regset_gs ? tdesc_s390x_gs_linux64 :
+ have_regset_vxrs ?
(have_regset_tdb ? tdesc_s390x_tevx_linux64 :
tdesc_s390x_vx_linux64) :
have_regset_tdb ? tdesc_s390x_te_linux64 :
tdesc_s390x_linux64);
if (hwcap & HWCAP_S390_HIGH_GPRS)
- return (have_regset_vxrs ?
+ return (have_regset_gs ? tdesc_s390_gs_linux64 :
+ have_regset_vxrs ?
(have_regset_tdb ? tdesc_s390_tevx_linux64 :
tdesc_s390_vx_linux64) :
have_regset_tdb ? tdesc_s390_te_linux64 :
tdesc_s390_linux32);
}
-void _initialize_s390_nat (void);
-
void
_initialize_s390_nat (void)
{
- struct target_ops *t;
-
- /* Fill in the generic GNU/Linux methods. */
- t = linux_target ();
-
- /* Add our register access methods. */
- t->to_fetch_registers = s390_linux_fetch_inferior_registers;
- t->to_store_registers = s390_linux_store_inferior_registers;
-
- /* Add our watchpoint methods. */
- t->to_can_use_hw_breakpoint = s390_can_use_hw_breakpoint;
- t->to_insert_hw_breakpoint = s390_insert_hw_breakpoint;
- t->to_remove_hw_breakpoint = s390_remove_hw_breakpoint;
- 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. */
- linux_nat_add_target (t);
- linux_nat_set_new_thread (t, s390_new_thread);
- linux_nat_set_prepare_to_resume (t, s390_prepare_to_resume);
- linux_nat_set_forget_process (t, s390_forget_process);
- linux_nat_set_new_fork (t, s390_linux_new_fork);
+ linux_target = &the_s390_linux_nat_target;
+ add_inf_child_target (&the_s390_linux_nat_target);
/* A maintenance command to enable showing the PER state. */
add_setshow_boolean_cmd ("show-debug-regs", class_maintenance,
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