/* GNU/Linux/CRIS specific low level interface, for the remote server for GDB.
- Copyright (C) 1995-1996, 1998-2005, 2007-2012 Free Software
- Foundation, Inc.
+ Copyright (C) 1995-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "server.h"
#include "linux-low.h"
-#include <sys/ptrace.h>
+#include "nat/gdb_ptrace.h"
/* Defined in auto-generated file reg-crisv32.c. */
void init_registers_crisv32 (void);
+extern const struct target_desc *tdesc_crisv32;
/* CRISv32 */
#define cris_num_regs 49
+#ifndef PTRACE_GET_THREAD_AREA
+#define PTRACE_GET_THREAD_AREA 25
+#endif
+
/* Note: Ignoring USP (having the stack pointer in two locations causes trouble
without any significant gain). */
};
-extern int debug_threads;
+static const unsigned short cris_breakpoint = 0xe938;
+#define cris_breakpoint_len 2
-static CORE_ADDR
-cris_get_pc (struct regcache *regcache)
-{
- unsigned long pc;
- collect_register_by_name (regcache, "pc", &pc);
- if (debug_threads)
- fprintf (stderr, "stop pc is %08lx\n", pc);
- return pc;
-}
+/* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
-static void
-cris_set_pc (struct regcache *regcache, CORE_ADDR pc)
+static const gdb_byte *
+cris_sw_breakpoint_from_kind (int kind, int *size)
{
- unsigned long newpc = pc;
- supply_register_by_name (regcache, "pc", &newpc);
+ *size = cris_breakpoint_len;
+ return (const gdb_byte *) &cris_breakpoint;
}
-static const unsigned short cris_breakpoint = 0xe938;
-#define cris_breakpoint_len 2
-
static int
cris_breakpoint_at (CORE_ADDR where)
{
return 0;
}
-/* We only place breakpoints in empty marker functions, and thread locking
- is outside of the function. So rather than importing software single-step,
- we can just run until exit. */
-
-/* FIXME: This function should not be needed, since we have PTRACE_SINGLESTEP
- for CRISv32. Without it, td_ta_event_getmsg in thread_db_create_event
- will fail when debugging multi-threaded applications. */
-
-static CORE_ADDR
-cris_reinsert_addr (void)
-{
- struct regcache *regcache = get_thread_regcache (current_inferior, 1);
- unsigned long pc;
- collect_register_by_name (regcache, "srp", &pc);
- return pc;
-}
-
static void
cris_write_data_breakpoint (struct regcache *regcache,
int bp, unsigned long start, unsigned long end)
}
static int
-cris_insert_point (char type, CORE_ADDR addr, int len)
+cris_supports_z_point_type (char z_type)
+{
+ switch (z_type)
+ {
+ case Z_PACKET_WRITE_WP:
+ case Z_PACKET_READ_WP:
+ case Z_PACKET_ACCESS_WP:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static int
+cris_insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
+ int len, struct raw_breakpoint *bp)
{
int bp;
unsigned long bp_ctrl;
unsigned long ccs;
struct regcache *regcache;
- /* Breakpoint/watchpoint types (GDB terminology):
- 0 = memory breakpoint for instructions
- (not supported; done via memory write instead)
- 1 = hardware breakpoint for instructions (not supported)
- 2 = write watchpoint (supported)
- 3 = read watchpoint (supported)
- 4 = access watchpoint (supported). */
-
- if (type < '2' || type > '4')
- {
- /* Unsupported. */
- return 1;
- }
-
- regcache = get_thread_regcache (current_inferior, 1);
+ regcache = get_thread_regcache (current_thread, 1);
/* Read watchpoints are set as access watchpoints, because of GDB's
inability to deal with pure read watchpoints. */
- if (type == '3')
- type = '4';
+ if (type == raw_bkpt_type_read_wp)
+ type = raw_bkpt_type_access_wp;
/* Get the configuration register. */
collect_register_by_name (regcache, "s0", &bp_ctrl);
}
/* Configure the control register first. */
- if (type == '3' || type == '4')
+ if (type == raw_bkpt_type_read_wp || type == raw_bkpt_type_access_wp)
{
/* Trigger on read. */
bp_ctrl |= (1 << (2 + bp * 4));
}
- if (type == '2' || type == '4')
+ if (type == raw_bkpt_type_write_wp || type == raw_bkpt_type_access_wp)
{
/* Trigger on write. */
bp_ctrl |= (2 << (2 + bp * 4));
}
static int
-cris_remove_point (char type, CORE_ADDR addr, int len)
+cris_remove_point (enum raw_bkpt_type type, CORE_ADDR addr, int len,
+ struct raw_breakpoint *bp)
{
int bp;
unsigned long bp_ctrl;
unsigned long start, end;
struct regcache *regcache;
+ unsigned long bp_d_regs[12];
- /* Breakpoint/watchpoint types:
- 0 = memory breakpoint for instructions
- (not supported; done via memory write instead)
- 1 = hardware breakpoint for instructions (not supported)
- 2 = write watchpoint (supported)
- 3 = read watchpoint (supported)
- 4 = access watchpoint (supported). */
- if (type < '2' || type > '4')
- return -1;
-
- regcache = get_thread_regcache (current_inferior, 1);
+ regcache = get_thread_regcache (current_thread, 1);
/* Read watchpoints are set as access watchpoints, because of GDB's
inability to deal with pure read watchpoints. */
- if (type == '3')
- type = '4';
+ if (type == raw_bkpt_type_read_wp)
+ type = raw_bkpt_type_access_wp;
/* Get the configuration register. */
collect_register_by_name (regcache, "s0", &bp_ctrl);
single switch (addr) as there may be several watchpoints with
the same start address for example. */
- unsigned long bp_d_regs[12];
-
/* Get all range registers to simplify search. */
collect_register_by_name (regcache, "s3", &bp_d_regs[0]);
collect_register_by_name (regcache, "s4", &bp_d_regs[1]);
/* Read/write bits for this BP. */
rw_bits = (bp_ctrl & (0x3 << bitpos)) >> bitpos;
- if ((type == '3' && rw_bits == 0x1)
- || (type == '2' && rw_bits == 0x2)
- || (type == '4' && rw_bits == 0x3))
+ if ((type == raw_bkpt_type_read_wp && rw_bits == 0x1)
+ || (type == raw_bkpt_type_write_wp && rw_bits == 0x2)
+ || (type == raw_bkpt_type_access_wp && rw_bits == 0x3))
{
/* Read/write matched. */
break;
cris_stopped_by_watchpoint (void)
{
unsigned long exs;
+ struct regcache *regcache = get_thread_regcache (current_thread, 1);
- collect_register_by_name ("exs", &exs);
+ collect_register_by_name (regcache, "exs", &exs);
return (((exs & 0xff00) >> 8) == 0xc);
}
cris_stopped_data_address (void)
{
unsigned long eda;
+ struct regcache *regcache = get_thread_regcache (current_thread, 1);
- collect_register_by_name ("eda", &eda);
+ collect_register_by_name (regcache, "eda", &eda);
/* FIXME: Possibly adjust to match watched range. */
return eda;
}
+ps_err_e
+ps_get_thread_area (struct ps_prochandle *ph,
+ lwpid_t lwpid, int idx, void **base)
+{
+ if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
+ return PS_ERR;
+
+ /* IDX is the bias from the thread pointer to the beginning of the
+ thread descriptor. It has to be subtracted due to implementation
+ quirks in libthread_db. */
+ *base = (void *) ((char *) *base - idx);
+ return PS_OK;
+}
+
static void
-cris_fill_gregset (void *buf)
+cris_fill_gregset (struct regcache *regcache, void *buf)
{
int i;
for (i = 0; i < cris_num_regs; i++)
{
if (cris_regmap[i] != -1)
- collect_register (i, ((char *) buf) + cris_regmap[i]);
+ collect_register (regcache, i, ((char *) buf) + cris_regmap[i]);
}
}
static void
-cris_store_gregset (const void *buf)
+cris_store_gregset (struct regcache *regcache, const void *buf)
{
int i;
for (i = 0; i < cris_num_regs; i++)
{
if (cris_regmap[i] != -1)
- supply_register (i, ((char *) buf) + cris_regmap[i]);
+ supply_register (regcache, i, ((char *) buf) + cris_regmap[i]);
}
}
-typedef unsigned long elf_gregset_t[cris_num_regs];
+static void
+cris_arch_setup (void)
+{
+ current_process ()->tdesc = tdesc_crisv32;
+}
+
+/* Support for hardware single step. */
+
+static int
+cris_supports_hardware_single_step (void)
+{
+ return 1;
+}
-struct regset_info target_regsets[] = {
- { PTRACE_GETREGS, PTRACE_SETREGS, 0, sizeof (elf_gregset_t),
+static struct regset_info cris_regsets[] = {
+ { PTRACE_GETREGS, PTRACE_SETREGS, 0, cris_num_regs * 4,
GENERAL_REGS, cris_fill_gregset, cris_store_gregset },
- { 0, 0, 0, -1, -1, NULL, NULL }
+ NULL_REGSET
};
+
+static struct regsets_info cris_regsets_info =
+ {
+ cris_regsets, /* regsets */
+ 0, /* num_regsets */
+ NULL, /* disabled_regsets */
+ };
+
+static struct usrregs_info cris_usrregs_info =
+ {
+ cris_num_regs,
+ cris_regmap,
+ };
+
+static struct regs_info regs_info =
+ {
+ NULL, /* regset_bitmap */
+ &cris_usrregs_info,
+ &cris_regsets_info
+ };
+
+static const struct regs_info *
+cris_regs_info (void)
+{
+ return ®s_info;
+}
+
struct linux_target_ops the_low_target = {
- init_register_crisv32,
- -1,
+ cris_arch_setup,
+ cris_regs_info,
NULL,
NULL,
- NULL,
- NULL,
- cris_get_pc,
- cris_set_pc,
- (const unsigned char *) &cris_breakpoint,
- cris_breakpoint_len,
- cris_reinsert_addr,
+ NULL, /* fetch_register */
+ linux_get_pc_32bit,
+ linux_set_pc_32bit,
+ NULL, /* breakpoint_kind_from_pc */
+ cris_sw_breakpoint_from_kind,
+ NULL, /* get_next_pcs */
0,
cris_breakpoint_at,
+ cris_supports_z_point_type,
cris_insert_point,
cris_remove_point,
cris_stopped_by_watchpoint,
cris_stopped_data_address,
+ NULL, /* collect_ptrace_register */
+ NULL, /* supply_ptrace_register */
+ NULL, /* siginfo_fixup */
+ NULL, /* new_process */
+ NULL, /* delete_process */
+ NULL, /* new_thread */
+ NULL, /* delete_thread */
+ NULL, /* new_fork */
+ NULL, /* prepare_to_resume */
+ NULL, /* process_qsupported */
+ NULL, /* supports_tracepoints */
+ NULL, /* get_thread_area */
+ NULL, /* install_fast_tracepoint_jump_pad */
+ NULL, /* emit_ops */
+ NULL, /* get_min_fast_tracepoint_insn_len */
+ NULL, /* supports_range_stepping */
+ NULL, /* breakpoint_kind_from_current_state */
+ cris_supports_hardware_single_step,
};
+
+void
+initialize_low_arch (void)
+{
+ init_registers_crisv32 ();
+
+ initialize_regsets_info (&cris_regsets_info);
+}
projects / deliverable / binutils-gdb.git / blobdiff