[thirdparty/binutils-gdb.git] / gdbserver / linux-loongarch-low.cc

/* GNU/Linux/LoongArch specific low level interface, for the remote server
   for GDB.
   Copyright (C) 2022-2024 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 "linux-low.h"
#include "tdesc.h"
#include "elf/common.h"
#include "arch/loongarch.h"

/* Linux target ops definitions for the LoongArch architecture.  */

class loongarch_target : public linux_process_target
{
public:

  const regs_info *get_regs_info () override;

  int breakpoint_kind_from_pc (CORE_ADDR *pcptr) override;

  const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override;

protected:

  void low_arch_setup () override;

  bool low_cannot_fetch_register (int regno) override;

  bool low_cannot_store_register (int regno) override;

  bool low_fetch_register (regcache *regcache, int regno) override;

  bool low_supports_breakpoints () override;

  CORE_ADDR low_get_pc (regcache *regcache) override;

  void low_set_pc (regcache *regcache, CORE_ADDR newpc) override;

  bool low_breakpoint_at (CORE_ADDR pc) override;
};

/* The singleton target ops object.  */

static loongarch_target the_loongarch_target;

bool
loongarch_target::low_cannot_fetch_register (int regno)
{
  gdb_assert_not_reached ("linux target op low_cannot_fetch_register "
			  "is not implemented by the target");
}

bool
loongarch_target::low_cannot_store_register (int regno)
{
  gdb_assert_not_reached ("linux target op low_cannot_store_register "
			  "is not implemented by the target");
}

/* Implementation of linux target ops method "low_arch_setup".  */

void
loongarch_target::low_arch_setup ()
{
  static const char *expedite_regs[] = { "r3", "pc", NULL };
  loongarch_gdbarch_features features;
  target_desc_up tdesc;

  features.xlen = sizeof (elf_greg_t);
  tdesc = loongarch_create_target_description (features);

  if (tdesc->expedite_regs.empty ())
    {
      init_target_desc (tdesc.get (), expedite_regs);
      gdb_assert (!tdesc->expedite_regs.empty ());
    }
  current_process ()->tdesc = tdesc.release ();
}

/* Collect GPRs from REGCACHE into BUF.  */

static void
loongarch_fill_gregset (struct regcache *regcache, void *buf)
{
  elf_gregset_t *regset = (elf_gregset_t *) buf;
  int i;

  for (i = 1; i < 32; i++)
    collect_register (regcache, i, *regset + i);
  collect_register (regcache, LOONGARCH_ORIG_A0_REGNUM, *regset + LOONGARCH_ORIG_A0_REGNUM);
  collect_register (regcache, LOONGARCH_PC_REGNUM, *regset + LOONGARCH_PC_REGNUM);
  collect_register (regcache, LOONGARCH_BADV_REGNUM, *regset + LOONGARCH_BADV_REGNUM);
}

/* Supply GPRs from BUF into REGCACHE.  */

static void
loongarch_store_gregset (struct regcache *regcache, const void *buf)
{
  const elf_gregset_t *regset = (const elf_gregset_t *) buf;
  int i;

  supply_register_zeroed (regcache, 0);
  for (i = 1; i < 32; i++)
    supply_register (regcache, i, *regset + i);
  supply_register (regcache, LOONGARCH_ORIG_A0_REGNUM, *regset + LOONGARCH_ORIG_A0_REGNUM);
  supply_register (regcache, LOONGARCH_PC_REGNUM, *regset + LOONGARCH_PC_REGNUM);
  supply_register (regcache, LOONGARCH_BADV_REGNUM, *regset + LOONGARCH_BADV_REGNUM);
}

/* Collect FPRs from REGCACHE into BUF.  */

static void
loongarch_fill_fpregset (struct regcache *regcache, void *buf)
{
  gdb_byte *regbuf = nullptr;
  int fprsize = register_size (regcache->tdesc, LOONGARCH_FIRST_FP_REGNUM);
  int fccsize = register_size (regcache->tdesc, LOONGARCH_FIRST_FCC_REGNUM);

  for (int i = 0; i < LOONGARCH_LINUX_NUM_FPREGSET; i++)
    {
      regbuf = (gdb_byte *)buf + fprsize * i;
      collect_register (regcache, LOONGARCH_FIRST_FP_REGNUM + i, regbuf);
    }

  for (int i = 0; i < LOONGARCH_LINUX_NUM_FCC; i++)
    {
      regbuf = (gdb_byte *)buf + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
	fccsize * i;
      collect_register (regcache, LOONGARCH_FIRST_FCC_REGNUM + i, regbuf);
    }

  regbuf = (gdb_byte *)buf + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
    fccsize * LOONGARCH_LINUX_NUM_FCC;
  collect_register (regcache, LOONGARCH_FCSR_REGNUM, regbuf);
}

/* Supply FPRs from BUF into REGCACHE.  */

static void
loongarch_store_fpregset (struct regcache *regcache, const void *buf)
{
  const gdb_byte *regbuf = nullptr;
  int fprsize = register_size (regcache->tdesc, LOONGARCH_FIRST_FP_REGNUM);
  int fccsize = register_size (regcache->tdesc, LOONGARCH_FIRST_FCC_REGNUM);

  for (int i = 0; i < LOONGARCH_LINUX_NUM_FPREGSET; i++)
    {
      regbuf = (const gdb_byte *)buf + fprsize * i;
      supply_register (regcache, LOONGARCH_FIRST_FP_REGNUM + i, regbuf);
    }

  for (int i = 0; i < LOONGARCH_LINUX_NUM_FCC; i++)
    {
      regbuf = (const gdb_byte *)buf + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
	fccsize * i;
      supply_register (regcache, LOONGARCH_FIRST_FCC_REGNUM + i, regbuf);
    }

  regbuf = (const gdb_byte *)buf + fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
    fccsize * LOONGARCH_LINUX_NUM_FCC;
  supply_register (regcache, LOONGARCH_FCSR_REGNUM, regbuf);
}

/* Collect lsx regs from REGCACHE into BUF.  */

static void
loongarch_fill_lsxregset (struct regcache *regcache, void *buf)
{
  elf_lsxregset_t *regset = (elf_lsxregset_t *) buf;
  int i;

  for (i = 0; i < LOONGARCH_LINUX_NUM_LSXREGSET; i++)
    collect_register (regcache, LOONGARCH_FIRST_LSX_REGNUM + i, *regset + i);
}

/* Supply lsx regs from BUF into REGCACHE.  */

static void
loongarch_store_lsxregset (struct regcache *regcache, const void *buf)
{
  const elf_lsxregset_t *regset = (const elf_lsxregset_t *) buf;
  int i;

  for (i = 0; i < LOONGARCH_LINUX_NUM_LSXREGSET; i++)
    supply_register (regcache, LOONGARCH_FIRST_LSX_REGNUM + i, *regset + i);
}

/* Collect lasx regs from REGCACHE into BUF.  */

static void
loongarch_fill_lasxregset (struct regcache *regcache, void *buf)
{
  elf_lasxregset_t *regset = (elf_lasxregset_t *) buf;
  int i;

  for (i = 0; i < LOONGARCH_LINUX_NUM_LASXREGSET; i++)
    collect_register (regcache, LOONGARCH_FIRST_LASX_REGNUM + i, *regset + i);
}

/* Supply lasx regs from BUF into REGCACHE.  */

static void
loongarch_store_lasxregset (struct regcache *regcache, const void *buf)
{
  const elf_lasxregset_t *regset = (const elf_lasxregset_t *) buf;
  int i;

  for (i = 0; i < LOONGARCH_LINUX_NUM_LASXREGSET; i++)
    supply_register (regcache, LOONGARCH_FIRST_LASX_REGNUM + i, *regset + i);
}

/* Collect lbt regs from REGCACHE into BUF.  */

static void
loongarch_fill_lbtregset (struct regcache *regcache, void *buf)
{
  gdb_byte *regbuf = (gdb_byte*)buf;
  int scrsize = register_size (regcache->tdesc, LOONGARCH_FIRST_SCR_REGNUM);
  int eflagssize = register_size (regcache->tdesc, LOONGARCH_EFLAGS_REGNUM);
  int i;

  for (i = 0; i < LOONGARCH_LINUX_NUM_SCR; i++)
    collect_register (regcache, LOONGARCH_FIRST_SCR_REGNUM + i, regbuf + scrsize * i);

  collect_register (regcache, LOONGARCH_EFLAGS_REGNUM,
		    regbuf + LOONGARCH_LINUX_NUM_SCR * scrsize);
  collect_register (regcache, LOONGARCH_FTOP_REGNUM,
		    regbuf + LOONGARCH_LINUX_NUM_SCR * scrsize + eflagssize);

}

/* Supply lbt regs from BUF into REGCACHE.  */

static void
loongarch_store_lbtregset (struct regcache *regcache, const void *buf)
{

  gdb_byte *regbuf = (gdb_byte*)buf;
  int scrsize = register_size (regcache->tdesc, LOONGARCH_FIRST_SCR_REGNUM);
  int eflagssize = register_size (regcache->tdesc, LOONGARCH_EFLAGS_REGNUM);
  int i;

  for (i = 0; i < LOONGARCH_LINUX_NUM_SCR; i++)
    supply_register (regcache, LOONGARCH_FIRST_SCR_REGNUM + i, regbuf + scrsize * i);

  supply_register (regcache, LOONGARCH_EFLAGS_REGNUM,
		    regbuf + LOONGARCH_LINUX_NUM_SCR * scrsize);
  supply_register (regcache, LOONGARCH_FTOP_REGNUM,
		    regbuf + LOONGARCH_LINUX_NUM_SCR * scrsize + eflagssize);

}

/* LoongArch/Linux regsets.  */
static struct regset_info loongarch_regsets[] = {
  { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, sizeof (elf_gregset_t),
    GENERAL_REGS, loongarch_fill_gregset, loongarch_store_gregset },
  { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_FPREGSET, sizeof (elf_fpregset_t),
    FP_REGS, loongarch_fill_fpregset, loongarch_store_fpregset },
  { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_LARCH_LSX, sizeof (elf_lsxregset_t),
    OPTIONAL_REGS, loongarch_fill_lsxregset, loongarch_store_lsxregset },
  { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_LARCH_LASX, sizeof (elf_lasxregset_t),
    OPTIONAL_REGS, loongarch_fill_lasxregset, loongarch_store_lasxregset },
  { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_LARCH_LBT, LOONGARCH_LBT_REGS_SIZE,
    OPTIONAL_REGS, loongarch_fill_lbtregset, loongarch_store_lbtregset },
  NULL_REGSET
};

/* LoongArch/Linux regset information.  */
static struct regsets_info loongarch_regsets_info =
  {
    loongarch_regsets, /* regsets */
    0, /* num_regsets */
    NULL, /* disabled_regsets */
  };

/* Definition of linux_target_ops data member "regs_info".  */
static struct regs_info loongarch_regs =
  {
    NULL, /* regset_bitmap */
    NULL, /* usrregs */
    &loongarch_regsets_info,
  };

/* Implementation of linux target ops method "get_regs_info".  */

const regs_info *
loongarch_target::get_regs_info ()
{
  return &loongarch_regs;
}

/* Implementation of linux target ops method "low_fetch_register".  */

bool
loongarch_target::low_fetch_register (regcache *regcache, int regno)
{
  if (regno != 0)
    return false;
  supply_register_zeroed (regcache, 0);
  return true;
}

bool
loongarch_target::low_supports_breakpoints ()
{
  return true;
}

/* Implementation of linux target ops method "low_get_pc".  */

CORE_ADDR
loongarch_target::low_get_pc (regcache *regcache)
{
  if (register_size (regcache->tdesc, 0) == 8)
    return linux_get_pc_64bit (regcache);
  else
    return linux_get_pc_32bit (regcache);
}

/* Implementation of linux target ops method "low_set_pc".  */

void
loongarch_target::low_set_pc (regcache *regcache, CORE_ADDR newpc)
{
  if (register_size (regcache->tdesc, 0) == 8)
    linux_set_pc_64bit (regcache, newpc);
  else
    linux_set_pc_32bit (regcache, newpc);
}

#define loongarch_breakpoint_len 4

/* LoongArch BRK software debug mode instruction.
   This instruction needs to match gdb/loongarch-tdep.c
   (loongarch_default_breakpoint).  */
static const gdb_byte loongarch_breakpoint[] = {0x05, 0x00, 0x2a, 0x00};

/* Implementation of target ops method "breakpoint_kind_from_pc".  */

int
loongarch_target::breakpoint_kind_from_pc (CORE_ADDR *pcptr)
{
  return loongarch_breakpoint_len;
}

/* Implementation of target ops method "sw_breakpoint_from_kind".  */

const gdb_byte *
loongarch_target::sw_breakpoint_from_kind (int kind, int *size)
{
  *size = loongarch_breakpoint_len;
  return (const gdb_byte *) &loongarch_breakpoint;
}

/* Implementation of linux target ops method "low_breakpoint_at".  */

bool
loongarch_target::low_breakpoint_at (CORE_ADDR pc)
{
  gdb_byte insn[loongarch_breakpoint_len];

  read_memory (pc, (unsigned char *) &insn, loongarch_breakpoint_len);
  if (memcmp (insn, loongarch_breakpoint, loongarch_breakpoint_len) == 0)
    return true;

  return false;
}

/* The linux target ops object.  */

linux_process_target *the_linux_target = &the_loongarch_target;

/* Initialize the LoongArch/Linux target.  */

void
initialize_low_arch ()
{
  initialize_regsets_info (&loongarch_regsets_info);
}
Commit	Line	Data
e5ab6af5 YT	1	/* GNU/Linux/LoongArch specific low level interface, for the remote server
e5ab6af5 YT	2	for GDB.
1d506c26	3	Copyright (C) 2022-2024 Free Software Foundation, Inc.
e5ab6af5 YT	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 3 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program. If not, see <http://www.gnu.org/licenses/>. */
	19
	20	#include "server.h"
	21	#include "linux-low.h"
	22	#include "tdesc.h"
	23	#include "elf/common.h"
	24	#include "arch/loongarch.h"
	25
	26	/* Linux target ops definitions for the LoongArch architecture. */
	27
	28	class loongarch_target : public linux_process_target
	29	{
	30	public:
	31
	32	const regs_info *get_regs_info () override;
	33
	34	int breakpoint_kind_from_pc (CORE_ADDR *pcptr) override;
	35
	36	const gdb_byte sw_breakpoint_from_kind (int kind, int size) override;
	37
	38	protected:
	39
	40	void low_arch_setup () override;
	41
	42	bool low_cannot_fetch_register (int regno) override;
	43
	44	bool low_cannot_store_register (int regno) override;
	45
	46	bool low_fetch_register (regcache *regcache, int regno) override;
	47
	48	bool low_supports_breakpoints () override;
	49
	50	CORE_ADDR low_get_pc (regcache *regcache) override;
	51
	52	void low_set_pc (regcache *regcache, CORE_ADDR newpc) override;
	53
	54	bool low_breakpoint_at (CORE_ADDR pc) override;
	55	};
	56
	57	/* The singleton target ops object. */
	58
	59	static loongarch_target the_loongarch_target;
	60
	61	bool
	62	loongarch_target::low_cannot_fetch_register (int regno)
	63	{
	64	gdb_assert_not_reached ("linux target op low_cannot_fetch_register "
	65	"is not implemented by the target");
	66	}
	67
68	bool
69	loongarch_target::low_cannot_store_register (int regno)
70	{
71	gdb_assert_not_reached ("linux target op low_cannot_store_register "
72	"is not implemented by the target");
73	}
74
75	/* Implementation of linux target ops method "low_arch_setup". */
76
77	void
78	loongarch_target::low_arch_setup ()
79	{
80	static const char *expedite_regs[] = { "r3", "pc", NULL };
81	loongarch_gdbarch_features features;
82	target_desc_up tdesc;
83
84	features.xlen = sizeof (elf_greg_t);
85	tdesc = loongarch_create_target_description (features);
86
dd6a9ec1 AB	87	if (tdesc->expedite_regs.empty ())
	88	{
	89	init_target_desc (tdesc.get (), expedite_regs);
	90	gdb_assert (!tdesc->expedite_regs.empty ());
	91	}
e5ab6af5 YT	92	current_process ()->tdesc = tdesc.release ();
	93	}
	94
	95	/* Collect GPRs from REGCACHE into BUF. */
	96
	97	static void
	98	loongarch_fill_gregset (struct regcache regcache, void buf)
	99	{
e5ab6af5	100	elf_gregset_t regset = (elf_gregset_t ) buf;
e5ab6af5 YT	101	int i;
	102
	103	for (i = 1; i < 32; i++)
3eba4833	104	collect_register (regcache, i, *regset + i);
74baa6cd	105	collect_register (regcache, LOONGARCH_ORIG_A0_REGNUM, *regset + LOONGARCH_ORIG_A0_REGNUM);
3eba4833 YT	106	collect_register (regcache, LOONGARCH_PC_REGNUM, *regset + LOONGARCH_PC_REGNUM);
3eba4833 YT	107	collect_register (regcache, LOONGARCH_BADV_REGNUM, *regset + LOONGARCH_BADV_REGNUM);
e5ab6af5 YT	108	}
	109
	110	/* Supply GPRs from BUF into REGCACHE. */
	111
	112	static void
	113	loongarch_store_gregset (struct regcache regcache, const void buf)
	114	{
e5ab6af5	115	const elf_gregset_t regset = (const elf_gregset_t ) buf;
e5ab6af5 YT	116	int i;
e5ab6af5 YT	117
3eba4833	118	supply_register_zeroed (regcache, 0);
e5ab6af5	119	for (i = 1; i < 32; i++)
3eba4833	120	supply_register (regcache, i, *regset + i);
74baa6cd	121	supply_register (regcache, LOONGARCH_ORIG_A0_REGNUM, *regset + LOONGARCH_ORIG_A0_REGNUM);
3eba4833 YT	122	supply_register (regcache, LOONGARCH_PC_REGNUM, *regset + LOONGARCH_PC_REGNUM);
3eba4833 YT	123	supply_register (regcache, LOONGARCH_BADV_REGNUM, *regset + LOONGARCH_BADV_REGNUM);
e5ab6af5 YT	124	}
e5ab6af5 YT	125
3f6227c2 TY	126	/* Collect FPRs from REGCACHE into BUF. */
	127
	128	static void
	129	loongarch_fill_fpregset (struct regcache regcache, void buf)
	130	{
	131	gdb_byte *regbuf = nullptr;
	132	int fprsize = register_size (regcache->tdesc, LOONGARCH_FIRST_FP_REGNUM);
ea335217	133	int fccsize = register_size (regcache->tdesc, LOONGARCH_FIRST_FCC_REGNUM);
3f6227c2 TY	134
	135	for (int i = 0; i < LOONGARCH_LINUX_NUM_FPREGSET; i++)
	136	{
	137	regbuf = (gdb_byte )buf + fprsize i;
	138	collect_register (regcache, LOONGARCH_FIRST_FP_REGNUM + i, regbuf);
	139	}
ea335217 FC	140
	141	for (int i = 0; i < LOONGARCH_LINUX_NUM_FCC; i++)
	142	{
	143	regbuf = (gdb_byte )buf + fprsize LOONGARCH_LINUX_NUM_FPREGSET +
	144	fccsize * i;
	145	collect_register (regcache, LOONGARCH_FIRST_FCC_REGNUM + i, regbuf);
	146	}
	147
	148	regbuf = (gdb_byte )buf + fprsize LOONGARCH_LINUX_NUM_FPREGSET +
	149	fccsize * LOONGARCH_LINUX_NUM_FCC;
	150	collect_register (regcache, LOONGARCH_FCSR_REGNUM, regbuf);
3f6227c2 TY	151	}
	152
	153	/* Supply FPRs from BUF into REGCACHE. */
	154
	155	static void
	156	loongarch_store_fpregset (struct regcache regcache, const void buf)
	157	{
	158	const gdb_byte *regbuf = nullptr;
	159	int fprsize = register_size (regcache->tdesc, LOONGARCH_FIRST_FP_REGNUM);
ea335217	160	int fccsize = register_size (regcache->tdesc, LOONGARCH_FIRST_FCC_REGNUM);
3f6227c2 TY	161
	162	for (int i = 0; i < LOONGARCH_LINUX_NUM_FPREGSET; i++)
	163	{
	164	regbuf = (const gdb_byte )buf + fprsize i;
	165	supply_register (regcache, LOONGARCH_FIRST_FP_REGNUM + i, regbuf);
	166	}
ea335217 FC	167
	168	for (int i = 0; i < LOONGARCH_LINUX_NUM_FCC; i++)
	169	{
	170	regbuf = (const gdb_byte )buf + fprsize LOONGARCH_LINUX_NUM_FPREGSET +
	171	fccsize * i;
	172	supply_register (regcache, LOONGARCH_FIRST_FCC_REGNUM + i, regbuf);
	173	}
	174
	175	regbuf = (const gdb_byte )buf + fprsize LOONGARCH_LINUX_NUM_FPREGSET +
	176	fccsize * LOONGARCH_LINUX_NUM_FCC;
	177	supply_register (regcache, LOONGARCH_FCSR_REGNUM, regbuf);
3f6227c2 TY	178	}
3f6227c2 TY	179
1e9569f3 HL	180	/* Collect lsx regs from REGCACHE into BUF. */
	181
	182	static void
	183	loongarch_fill_lsxregset (struct regcache regcache, void buf)
	184	{
	185	elf_lsxregset_t regset = (elf_lsxregset_t ) buf;
	186	int i;
	187
	188	for (i = 0; i < LOONGARCH_LINUX_NUM_LSXREGSET; i++)
	189	collect_register (regcache, LOONGARCH_FIRST_LSX_REGNUM + i, *regset + i);
	190	}
	191
	192	/* Supply lsx regs from BUF into REGCACHE. */
	193
	194	static void
	195	loongarch_store_lsxregset (struct regcache regcache, const void buf)
	196	{
	197	const elf_lsxregset_t regset = (const elf_lsxregset_t ) buf;
	198	int i;
	199
	200	for (i = 0; i < LOONGARCH_LINUX_NUM_LSXREGSET; i++)
	201	supply_register (regcache, LOONGARCH_FIRST_LSX_REGNUM + i, *regset + i);
	202	}
	203
	204	/* Collect lasx regs from REGCACHE into BUF. */
	205
	206	static void
	207	loongarch_fill_lasxregset (struct regcache regcache, void buf)
	208	{
	209	elf_lasxregset_t regset = (elf_lasxregset_t ) buf;
	210	int i;
	211
	212	for (i = 0; i < LOONGARCH_LINUX_NUM_LASXREGSET; i++)
	213	collect_register (regcache, LOONGARCH_FIRST_LASX_REGNUM + i, *regset + i);
	214	}
	215
	216	/* Supply lasx regs from BUF into REGCACHE. */
	217
	218	static void
	219	loongarch_store_lasxregset (struct regcache regcache, const void buf)
	220	{
	221	const elf_lasxregset_t regset = (const elf_lasxregset_t ) buf;
	222	int i;
	223
	224	for (i = 0; i < LOONGARCH_LINUX_NUM_LASXREGSET; i++)
	225	supply_register (regcache, LOONGARCH_FIRST_LASX_REGNUM + i, *regset + i);
	226	}
	227
e4d74c01 FC	228	/* Collect lbt regs from REGCACHE into BUF. */
	229
	230	static void
	231	loongarch_fill_lbtregset (struct regcache regcache, void buf)
	232	{
	233	gdb_byte regbuf = (gdb_byte)buf;
	234	int scrsize = register_size (regcache->tdesc, LOONGARCH_FIRST_SCR_REGNUM);
	235	int eflagssize = register_size (regcache->tdesc, LOONGARCH_EFLAGS_REGNUM);
	236	int i;
	237
	238	for (i = 0; i < LOONGARCH_LINUX_NUM_SCR; i++)
	239	collect_register (regcache, LOONGARCH_FIRST_SCR_REGNUM + i, regbuf + scrsize * i);
	240
	241	collect_register (regcache, LOONGARCH_EFLAGS_REGNUM,
	242	regbuf + LOONGARCH_LINUX_NUM_SCR * scrsize);
	243	collect_register (regcache, LOONGARCH_FTOP_REGNUM,
	244	regbuf + LOONGARCH_LINUX_NUM_SCR * scrsize + eflagssize);
	245
	246	}
	247
	248	/* Supply lbt regs from BUF into REGCACHE. */
	249
	250	static void
	251	loongarch_store_lbtregset (struct regcache regcache, const void buf)
	252	{
	253
	254	gdb_byte regbuf = (gdb_byte)buf;
	255	int scrsize = register_size (regcache->tdesc, LOONGARCH_FIRST_SCR_REGNUM);
	256	int eflagssize = register_size (regcache->tdesc, LOONGARCH_EFLAGS_REGNUM);
	257	int i;
	258
	259	for (i = 0; i < LOONGARCH_LINUX_NUM_SCR; i++)
	260	supply_register (regcache, LOONGARCH_FIRST_SCR_REGNUM + i, regbuf + scrsize * i);
	261
	262	supply_register (regcache, LOONGARCH_EFLAGS_REGNUM,
	263	regbuf + LOONGARCH_LINUX_NUM_SCR * scrsize);
	264	supply_register (regcache, LOONGARCH_FTOP_REGNUM,
	265	regbuf + LOONGARCH_LINUX_NUM_SCR * scrsize + eflagssize);
	266
	267	}
	268
e5ab6af5 YT	269	/* LoongArch/Linux regsets. */
	270	static struct regset_info loongarch_regsets[] = {
	271	{ PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, sizeof (elf_gregset_t),
	272	GENERAL_REGS, loongarch_fill_gregset, loongarch_store_gregset },
3f6227c2 TY	273	{ PTRACE_GETREGSET, PTRACE_SETREGSET, NT_FPREGSET, sizeof (elf_fpregset_t),
3f6227c2 TY	274	FP_REGS, loongarch_fill_fpregset, loongarch_store_fpregset },
1e9569f3 HL	275	{ PTRACE_GETREGSET, PTRACE_SETREGSET, NT_LARCH_LSX, sizeof (elf_lsxregset_t),
	276	OPTIONAL_REGS, loongarch_fill_lsxregset, loongarch_store_lsxregset },
	277	{ PTRACE_GETREGSET, PTRACE_SETREGSET, NT_LARCH_LASX, sizeof (elf_lasxregset_t),
	278	OPTIONAL_REGS, loongarch_fill_lasxregset, loongarch_store_lasxregset },
e4d74c01 FC	279	{ PTRACE_GETREGSET, PTRACE_SETREGSET, NT_LARCH_LBT, LOONGARCH_LBT_REGS_SIZE,
e4d74c01 FC	280	OPTIONAL_REGS, loongarch_fill_lbtregset, loongarch_store_lbtregset },
e5ab6af5 YT	281	NULL_REGSET
	282	};
	283
	284	/* LoongArch/Linux regset information. */
	285	static struct regsets_info loongarch_regsets_info =
	286	{
	287	loongarch_regsets, /* regsets */
	288	0, /* num_regsets */
	289	NULL, /* disabled_regsets */
	290	};
	291
	292	/* Definition of linux_target_ops data member "regs_info". */
	293	static struct regs_info loongarch_regs =
	294	{
	295	NULL, /* regset_bitmap */
	296	NULL, /* usrregs */
	297	&loongarch_regsets_info,
	298	};
	299
	300	/* Implementation of linux target ops method "get_regs_info". */
	301
	302	const regs_info *
	303	loongarch_target::get_regs_info ()
	304	{
	305	return &loongarch_regs;
	306	}
	307
	308	/* Implementation of linux target ops method "low_fetch_register". */
	309
	310	bool
	311	loongarch_target::low_fetch_register (regcache *regcache, int regno)
	312	{
3eba4833	313	if (regno != 0)
e5ab6af5	314	return false;
3eba4833	315	supply_register_zeroed (regcache, 0);
e5ab6af5 YT	316	return true;
	317	}
	318
	319	bool
	320	loongarch_target::low_supports_breakpoints ()
	321	{
	322	return true;
	323	}
	324
	325	/* Implementation of linux target ops method "low_get_pc". */
	326
	327	CORE_ADDR
	328	loongarch_target::low_get_pc (regcache *regcache)
	329	{
	330	if (register_size (regcache->tdesc, 0) == 8)
	331	return linux_get_pc_64bit (regcache);
	332	else
	333	return linux_get_pc_32bit (regcache);
	334	}
	335
	336	/* Implementation of linux target ops method "low_set_pc". */
	337
	338	void
	339	loongarch_target::low_set_pc (regcache *regcache, CORE_ADDR newpc)
	340	{
	341	if (register_size (regcache->tdesc, 0) == 8)
	342	linux_set_pc_64bit (regcache, newpc);
	343	else
	344	linux_set_pc_32bit (regcache, newpc);
	345	}
	346
	347	#define loongarch_breakpoint_len 4
	348
	349	/* LoongArch BRK software debug mode instruction.
	350	This instruction needs to match gdb/loongarch-tdep.c
	351	(loongarch_default_breakpoint). */
	352	static const gdb_byte loongarch_breakpoint[] = {0x05, 0x00, 0x2a, 0x00};
	353
	354	/* Implementation of target ops method "breakpoint_kind_from_pc". */
	355
	356	int
	357	loongarch_target::breakpoint_kind_from_pc (CORE_ADDR *pcptr)
	358	{
	359	return loongarch_breakpoint_len;
	360	}
	361
	362	/* Implementation of target ops method "sw_breakpoint_from_kind". */
	363
	364	const gdb_byte *
	365	loongarch_target::sw_breakpoint_from_kind (int kind, int *size)
	366	{
	367	*size = loongarch_breakpoint_len;
	368	return (const gdb_byte *) &loongarch_breakpoint;
	369	}
	370
	371	/* Implementation of linux target ops method "low_breakpoint_at". */
	372
	373	bool
	374	loongarch_target::low_breakpoint_at (CORE_ADDR pc)
	375	{
	376	gdb_byte insn[loongarch_breakpoint_len];
	377
	378	read_memory (pc, (unsigned char *) &insn, loongarch_breakpoint_len);
	379	if (memcmp (insn, loongarch_breakpoint, loongarch_breakpoint_len) == 0)
380	return true;
381
382	return false;
383	}
384
385	/* The linux target ops object. */
386
387	linux_process_target *the_linux_target = &the_loongarch_target;
388
389	/* Initialize the LoongArch/Linux target. */
390
391	void
392	initialize_low_arch ()
393	{
394	initialize_regsets_info (&loongarch_regsets_info);
395	}