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/* GNU/Linux/AArch64 specific low level interface, for the in-process
agent library for GDB.
Copyright (C) 2015-2016 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "server.h"
#include "tracepoint.h"
/* Defined in auto-generated file aarch64.c. */
void init_registers_aarch64 (void);
extern const struct target_desc *tdesc_aarch64;
/* Each register saved by the jump pad is in a 16 byte cell. */
#define FT_CR_SIZE 16
#define FT_CR_FPCR 0
#define FT_CR_FPSR 1
#define FT_CR_CPSR 2
#define FT_CR_PC 3
#define FT_CR_SP 4
#define FT_CR_X0 5
#define FT_CR_GPR(n) (FT_CR_X0 + (n))
#define FT_CR_FPR(n) (FT_CR_GPR (31) + (n))
/* Mapping between registers collected by the jump pad and GDB's register
array layout used by regcache.
See linux-aarch64-low.c (aarch64_install_fast_tracepoint_jump_pad) for
more details. */
static const int aarch64_ft_collect_regmap[] = {
FT_CR_GPR (0),
FT_CR_GPR (1),
FT_CR_GPR (2),
FT_CR_GPR (3),
FT_CR_GPR (4),
FT_CR_GPR (5),
FT_CR_GPR (6),
FT_CR_GPR (7),
FT_CR_GPR (8),
FT_CR_GPR (9),
FT_CR_GPR (10),
FT_CR_GPR (11),
FT_CR_GPR (12),
FT_CR_GPR (13),
FT_CR_GPR (14),
FT_CR_GPR (15),
FT_CR_GPR (16),
FT_CR_GPR (17),
FT_CR_GPR (18),
FT_CR_GPR (19),
FT_CR_GPR (20),
FT_CR_GPR (21),
FT_CR_GPR (22),
FT_CR_GPR (23),
FT_CR_GPR (24),
FT_CR_GPR (25),
FT_CR_GPR (26),
FT_CR_GPR (27),
FT_CR_GPR (28),
/* FP */
FT_CR_GPR (29),
/* LR */
FT_CR_GPR (30),
FT_CR_SP,
FT_CR_PC,
FT_CR_CPSR,
FT_CR_FPR (0),
FT_CR_FPR (1),
FT_CR_FPR (2),
FT_CR_FPR (3),
FT_CR_FPR (4),
FT_CR_FPR (5),
FT_CR_FPR (6),
FT_CR_FPR (7),
FT_CR_FPR (8),
FT_CR_FPR (9),
FT_CR_FPR (10),
FT_CR_FPR (11),
FT_CR_FPR (12),
FT_CR_FPR (13),
FT_CR_FPR (14),
FT_CR_FPR (15),
FT_CR_FPR (16),
FT_CR_FPR (17),
FT_CR_FPR (18),
FT_CR_FPR (19),
FT_CR_FPR (20),
FT_CR_FPR (21),
FT_CR_FPR (22),
FT_CR_FPR (23),
FT_CR_FPR (24),
FT_CR_FPR (25),
FT_CR_FPR (26),
FT_CR_FPR (27),
FT_CR_FPR (28),
FT_CR_FPR (29),
FT_CR_FPR (30),
FT_CR_FPR (31),
FT_CR_FPSR,
FT_CR_FPCR
};
#define AARCH64_NUM_FT_COLLECT_GREGS \
(sizeof (aarch64_ft_collect_regmap) / sizeof(aarch64_ft_collect_regmap[0]))
/* Fill in REGCACHE with registers saved by the jump pad in BUF. */
void
supply_fast_tracepoint_registers (struct regcache *regcache,
const unsigned char *buf)
{
int i;
for (i = 0; i < AARCH64_NUM_FT_COLLECT_GREGS; i++)
supply_register (regcache, i,
((char *) buf)
+ (aarch64_ft_collect_regmap[i] * FT_CR_SIZE));
}
IP_AGENT_EXPORT_FUNC ULONGEST
gdb_agent_get_raw_reg (const unsigned char *raw_regs, int regnum)
{
if (regnum >= AARCH64_NUM_FT_COLLECT_GREGS)
return 0;
return *(ULONGEST *) (raw_regs
+ aarch64_ft_collect_regmap[regnum] * FT_CR_SIZE);
}
void
initialize_low_tracepoint (void)
{
init_registers_aarch64 ();
ipa_tdesc = tdesc_aarch64;
}
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