113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/* GNU/Linux/PowerPC64 specific low level interface, for the remote server for
|
|
GDB.
|
|
Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2005
|
|
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"
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
#define ppc_num_regs 71
|
|
|
|
/* We use a constant for FPSCR instead of PT_FPSCR, because
|
|
many shipped PPC64 kernels had the wrong value in ptrace.h. */
|
|
static int ppc_regmap[] =
|
|
{PT_R0 * 8, PT_R1 * 8, PT_R2 * 8, PT_R3 * 8,
|
|
PT_R4 * 8, PT_R5 * 8, PT_R6 * 8, PT_R7 * 8,
|
|
PT_R8 * 8, PT_R9 * 8, PT_R10 * 8, PT_R11 * 8,
|
|
PT_R12 * 8, PT_R13 * 8, PT_R14 * 8, PT_R15 * 8,
|
|
PT_R16 * 8, PT_R17 * 8, PT_R18 * 8, PT_R19 * 8,
|
|
PT_R20 * 8, PT_R21 * 8, PT_R22 * 8, PT_R23 * 8,
|
|
PT_R24 * 8, PT_R25 * 8, PT_R26 * 8, PT_R27 * 8,
|
|
PT_R28 * 8, PT_R29 * 8, PT_R30 * 8, PT_R31 * 8,
|
|
PT_FPR0*8, PT_FPR0*8 + 8, PT_FPR0*8+16, PT_FPR0*8+24,
|
|
PT_FPR0*8+32, PT_FPR0*8+40, PT_FPR0*8+48, PT_FPR0*8+56,
|
|
PT_FPR0*8+64, PT_FPR0*8+72, PT_FPR0*8+80, PT_FPR0*8+88,
|
|
PT_FPR0*8+96, PT_FPR0*8+104, PT_FPR0*8+112, PT_FPR0*8+120,
|
|
PT_FPR0*8+128, PT_FPR0*8+136, PT_FPR0*8+144, PT_FPR0*8+152,
|
|
PT_FPR0*8+160, PT_FPR0*8+168, PT_FPR0*8+176, PT_FPR0*8+184,
|
|
PT_FPR0*8+192, PT_FPR0*8+200, PT_FPR0*8+208, PT_FPR0*8+216,
|
|
PT_FPR0*8+224, PT_FPR0*8+232, PT_FPR0*8+240, PT_FPR0*8+248,
|
|
PT_NIP * 8, PT_MSR * 8, PT_CCR * 8, PT_LNK * 8,
|
|
PT_CTR * 8, PT_XER * 8, PT_FPR0*8 + 256 };
|
|
|
|
static int
|
|
ppc_cannot_store_register (int regno)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ppc_cannot_fetch_register (int regno)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static CORE_ADDR
|
|
ppc_get_pc (void)
|
|
{
|
|
unsigned long pc;
|
|
|
|
collect_register_by_name ("pc", &pc);
|
|
return (CORE_ADDR) pc;
|
|
}
|
|
|
|
static void
|
|
ppc_set_pc (CORE_ADDR pc)
|
|
{
|
|
unsigned long newpc = pc;
|
|
|
|
supply_register_by_name ("pc", &newpc);
|
|
}
|
|
|
|
/* Correct in either endianness.
|
|
This instruction is "twge r2, r2", which GDB uses as a software
|
|
breakpoint. */
|
|
static const unsigned int ppc_breakpoint = 0x7d821008;
|
|
#define ppc_breakpoint_len 4
|
|
|
|
static int
|
|
ppc_breakpoint_at (CORE_ADDR where)
|
|
{
|
|
unsigned int insn;
|
|
|
|
(*the_target->read_memory) (where, (unsigned char *) &insn, 4);
|
|
if (insn == ppc_breakpoint)
|
|
return 1;
|
|
/* If necessary, recognize more trap instructions here. GDB only uses the
|
|
one. */
|
|
return 0;
|
|
}
|
|
|
|
struct linux_target_ops the_low_target = {
|
|
ppc_num_regs,
|
|
ppc_regmap,
|
|
ppc_cannot_fetch_register,
|
|
ppc_cannot_store_register,
|
|
ppc_get_pc,
|
|
ppc_set_pc,
|
|
(const unsigned char *) &ppc_breakpoint,
|
|
ppc_breakpoint_len,
|
|
NULL,
|
|
0,
|
|
ppc_breakpoint_at,
|
|
};
|