mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-11 14:14:23 +00:00
107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/* GNU/Linux/ARM specific low level interface, for the remote server for GDB.
|
|
Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
|
|
Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
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
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
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., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include "server.h"
|
|
#include "linux-low.h"
|
|
|
|
#ifdef HAVE_SYS_REG_H
|
|
#include <sys/reg.h>
|
|
#endif
|
|
|
|
#define arm_num_regs 26
|
|
|
|
static int arm_regmap[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 28,
|
|
32, 36, 40, 44, 48, 52, 56, 60,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
64
|
|
};
|
|
|
|
static int
|
|
arm_cannot_store_register (int regno)
|
|
{
|
|
return (regno >= arm_num_regs);
|
|
}
|
|
|
|
static int
|
|
arm_cannot_fetch_register (int regno)
|
|
{
|
|
return (regno >= arm_num_regs);
|
|
}
|
|
|
|
static CORE_ADDR
|
|
arm_get_pc ()
|
|
{
|
|
unsigned long pc;
|
|
collect_register_by_name ("pc", &pc);
|
|
return pc;
|
|
}
|
|
|
|
static void
|
|
arm_set_pc (CORE_ADDR pc)
|
|
{
|
|
unsigned long newpc = pc;
|
|
supply_register_by_name ("pc", &newpc);
|
|
}
|
|
|
|
/* Correct in either endianness. We do not support Thumb yet. */
|
|
static const unsigned long arm_breakpoint = 0xef9f0001;
|
|
#define arm_breakpoint_len 4
|
|
|
|
static int
|
|
arm_breakpoint_at (CORE_ADDR where)
|
|
{
|
|
unsigned long insn;
|
|
|
|
(*the_target->read_memory) (where, (char *) &insn, 4);
|
|
if (insn == arm_breakpoint)
|
|
return 1;
|
|
|
|
/* If necessary, recognize more trap instructions here. GDB only uses the
|
|
one. */
|
|
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. */
|
|
static CORE_ADDR
|
|
arm_reinsert_addr ()
|
|
{
|
|
unsigned long pc;
|
|
collect_register_by_name ("lr", &pc);
|
|
return pc;
|
|
}
|
|
|
|
struct linux_target_ops the_low_target = {
|
|
arm_num_regs,
|
|
arm_regmap,
|
|
arm_cannot_fetch_register,
|
|
arm_cannot_store_register,
|
|
arm_get_pc,
|
|
arm_set_pc,
|
|
(const char *) &arm_breakpoint,
|
|
arm_breakpoint_len,
|
|
arm_reinsert_addr,
|
|
0,
|
|
arm_breakpoint_at,
|
|
};
|