[thirdparty/binutils-gdb.git] / gdb / sparc-sol2-tdep.c

/* Target-dependent code for Solaris SPARC.

   Copyright (C) 2003-2025 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 "frame.h"
#include "frame-unwind.h"
#include "gdbcore.h"
#include "symtab.h"
#include "objfiles.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
#include "target.h"
#include "trad-frame.h"

#include "sol2-tdep.h"
#include "sparc-tdep.h"
#include "solib-svr4.h"

/* From <sys/regset.h>.  */
const struct sparc_gregmap sparc32_sol2_gregmap =
{
  32 * 4,			/* %psr */
  33 * 4,			/* %pc */
  34 * 4,			/* %npc */
  35 * 4,			/* %y */
  36 * 4,			/* %wim */
  37 * 4,			/* %tbr */
  1 * 4,			/* %g1 */
  16 * 4,			/* %l0 */
};

const struct sparc_fpregmap sparc32_sol2_fpregmap =
{
  0 * 4,			/* %f0 */
  33 * 4,			/* %fsr */
};

static void
sparc32_sol2_supply_core_gregset (const struct regset *regset,
				  struct regcache *regcache,
				  int regnum, const void *gregs, size_t len)
{
  sparc32_supply_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs);
}

static void
sparc32_sol2_collect_core_gregset (const struct regset *regset,
				   const struct regcache *regcache,
				   int regnum, void *gregs, size_t len)
{
  sparc32_collect_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs);
}

static void
sparc32_sol2_supply_core_fpregset (const struct regset *regset,
				   struct regcache *regcache,
				   int regnum, const void *fpregs, size_t len)
{
  sparc32_supply_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs);
}

static void
sparc32_sol2_collect_core_fpregset (const struct regset *regset,
				    const struct regcache *regcache,
				    int regnum, void *fpregs, size_t len)
{
  sparc32_collect_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs);
}

static const struct regset sparc32_sol2_gregset =
  {
    NULL,
    sparc32_sol2_supply_core_gregset,
    sparc32_sol2_collect_core_gregset
  };

static const struct regset sparc32_sol2_fpregset =
  {
    NULL,
    sparc32_sol2_supply_core_fpregset,
    sparc32_sol2_collect_core_fpregset
  };
\f

static struct sparc_frame_cache *
sparc32_sol2_sigtramp_frame_cache (const frame_info_ptr &this_frame,
				   void **this_cache)
{
  struct sparc_frame_cache *cache;
  CORE_ADDR mcontext_addr, addr;
  int regnum;

  if (*this_cache)
    return (struct sparc_frame_cache *) *this_cache;

  cache = sparc_frame_cache (this_frame, this_cache);
  gdb_assert (cache == *this_cache);

  cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);

  /* The third argument is a pointer to an instance of `ucontext_t',
     which has a member `uc_mcontext' that contains the saved
     registers.  */
  regnum =
    (cache->copied_regs_mask & 0x04) ? SPARC_I2_REGNUM : SPARC_O2_REGNUM;
  mcontext_addr = get_frame_register_unsigned (this_frame, regnum) + 40;

  cache->saved_regs[SPARC32_PSR_REGNUM].set_addr (mcontext_addr + 0 * 4);
  cache->saved_regs[SPARC32_PC_REGNUM].set_addr (mcontext_addr + 1 * 4);
  cache->saved_regs[SPARC32_NPC_REGNUM].set_addr (mcontext_addr + 2 * 4);
  cache->saved_regs[SPARC32_Y_REGNUM].set_addr (mcontext_addr + 3 * 4);

  /* Since %g0 is always zero, keep the identity encoding.  */
  for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 4;
       regnum <= SPARC_O7_REGNUM; regnum++, addr += 4)
    cache->saved_regs[regnum].set_addr (addr);

  if (get_frame_memory_unsigned (this_frame, mcontext_addr + 19 * 4, 4))
    {
      /* The register windows haven't been flushed.  */
      for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
	cache->saved_regs[regnum].set_unknown ();
    }
  else
    {
      addr = cache->saved_regs[SPARC_SP_REGNUM].addr ();
      addr = get_frame_memory_unsigned (this_frame, addr, 4);
      for (regnum = SPARC_L0_REGNUM;
	   regnum <= SPARC_I7_REGNUM; regnum++, addr += 4)
	cache->saved_regs[regnum].set_addr (addr);
    }

  return cache;
}

static void
sparc32_sol2_sigtramp_frame_this_id (const frame_info_ptr &this_frame,
				     void **this_cache,
				     struct frame_id *this_id)
{
  struct sparc_frame_cache *cache =
    sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache);

  (*this_id) = frame_id_build (cache->base, cache->pc);
}

static struct value *
sparc32_sol2_sigtramp_frame_prev_register (const frame_info_ptr &this_frame,
					   void **this_cache,
					   int regnum)
{
  struct sparc_frame_cache *cache =
    sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache);

  return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
}

static int
sparc32_sol2_sigtramp_frame_sniffer (const struct frame_unwind *self,
				     const frame_info_ptr &this_frame,
				     void **this_cache)
{
  return sol2_sigtramp_p (this_frame);
}

static const struct frame_unwind_legacy sparc32_sol2_sigtramp_frame_unwind (
  "sparc32 solaris sigtramp",
  SIGTRAMP_FRAME,
  FRAME_UNWIND_ARCH,
  default_frame_unwind_stop_reason,
  sparc32_sol2_sigtramp_frame_this_id,
  sparc32_sol2_sigtramp_frame_prev_register,
  NULL,
  sparc32_sol2_sigtramp_frame_sniffer
);

\f

static void
sparc32_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
  sparc_gdbarch_tdep *tdep = gdbarch_tdep<sparc_gdbarch_tdep> (gdbarch);

  tdep->gregset = &sparc32_sol2_gregset;
  tdep->sizeof_gregset = 152;

  tdep->fpregset = &sparc32_sol2_fpregset;
  tdep->sizeof_fpregset = 400;

  sol2_init_abi (info, gdbarch);

  /* Solaris has SVR4-style shared libraries...  */
  set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
  set_solib_svr4_ops (gdbarch, make_svr4_ilp32_solib_ops);

  /* ...which means that we need some special handling when doing
     prologue analysis.  */
  tdep->plt_entry_size = 12;

  /* Solaris has kernel-assisted single-stepping support.  */
  set_gdbarch_software_single_step (gdbarch, NULL);

  frame_unwind_append_unwinder (gdbarch, &sparc32_sol2_sigtramp_frame_unwind);
}

INIT_GDB_FILE (sparc_sol2_tdep)
{
  gdbarch_register_osabi (bfd_arch_sparc, 0,
			  GDB_OSABI_SOLARIS, sparc32_sol2_init_abi);
}
Commit	Line	Data
	1	/* Target-dependent code for Solaris SPARC.
	2
	3	Copyright (C) 2003-2025 Free Software Foundation, Inc.
	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 "frame.h"
	21	#include "frame-unwind.h"
	22	#include "gdbcore.h"
	23	#include "symtab.h"
	24	#include "objfiles.h"
	25	#include "osabi.h"
	26	#include "regcache.h"
	27	#include "regset.h"
	28	#include "target.h"
	29	#include "trad-frame.h"
	30
	31	#include "sol2-tdep.h"
	32	#include "sparc-tdep.h"
	33	#include "solib-svr4.h"
	34
	35	/* From <sys/regset.h>. */
	36	const struct sparc_gregmap sparc32_sol2_gregmap =
	37	{
	38	32 * 4, /* %psr */
	39	33 * 4, /* %pc */
	40	34 * 4, /* %npc */
	41	35 * 4, /* %y */
	42	36 * 4, /* %wim */
	43	37 * 4, /* %tbr */
	44	1 * 4, /* %g1 */
	45	16 * 4, /* %l0 */
	46	};
	47
	48	const struct sparc_fpregmap sparc32_sol2_fpregmap =
	49	{
	50	0 * 4, /* %f0 */
	51	33 * 4, /* %fsr */
	52	};
	53
	54	static void
	55	sparc32_sol2_supply_core_gregset (const struct regset *regset,
	56	struct regcache *regcache,
	57	int regnum, const void *gregs, size_t len)
	58	{
	59	sparc32_supply_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs);
	60	}
	61
	62	static void
	63	sparc32_sol2_collect_core_gregset (const struct regset *regset,
	64	const struct regcache *regcache,
	65	int regnum, void *gregs, size_t len)
	66	{
	67	sparc32_collect_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs);
	68	}
	69
	70	static void
	71	sparc32_sol2_supply_core_fpregset (const struct regset *regset,
	72	struct regcache *regcache,
	73	int regnum, const void *fpregs, size_t len)
	74	{
	75	sparc32_supply_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs);
	76	}
	77
	78	static void
	79	sparc32_sol2_collect_core_fpregset (const struct regset *regset,
	80	const struct regcache *regcache,
	81	int regnum, void *fpregs, size_t len)
	82	{
	83	sparc32_collect_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs);
	84	}
	85
	86	static const struct regset sparc32_sol2_gregset =
	87	{
	88	NULL,
	89	sparc32_sol2_supply_core_gregset,
	90	sparc32_sol2_collect_core_gregset
	91	};
	92
	93	static const struct regset sparc32_sol2_fpregset =
	94	{
	95	NULL,
	96	sparc32_sol2_supply_core_fpregset,
	97	sparc32_sol2_collect_core_fpregset
	98	};
	99	\f
	100
	101	static struct sparc_frame_cache *
	102	sparc32_sol2_sigtramp_frame_cache (const frame_info_ptr &this_frame,
	103	void **this_cache)
	104	{
	105	struct sparc_frame_cache *cache;
	106	CORE_ADDR mcontext_addr, addr;
	107	int regnum;
	108
	109	if (*this_cache)
	110	return (struct sparc_frame_cache ) this_cache;
	111
	112	cache = sparc_frame_cache (this_frame, this_cache);
	113	gdb_assert (cache == *this_cache);
	114
	115	cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
	116
	117	/* The third argument is a pointer to an instance of `ucontext_t',
	118	which has a member `uc_mcontext' that contains the saved
	119	registers. */
	120	regnum =
	121	(cache->copied_regs_mask & 0x04) ? SPARC_I2_REGNUM : SPARC_O2_REGNUM;
	122	mcontext_addr = get_frame_register_unsigned (this_frame, regnum) + 40;
	123
	124	cache->saved_regs[SPARC32_PSR_REGNUM].set_addr (mcontext_addr + 0 * 4);
	125	cache->saved_regs[SPARC32_PC_REGNUM].set_addr (mcontext_addr + 1 * 4);
	126	cache->saved_regs[SPARC32_NPC_REGNUM].set_addr (mcontext_addr + 2 * 4);
	127	cache->saved_regs[SPARC32_Y_REGNUM].set_addr (mcontext_addr + 3 * 4);
	128
	129	/* Since %g0 is always zero, keep the identity encoding. */
	130	for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 4;
	131	regnum <= SPARC_O7_REGNUM; regnum++, addr += 4)
	132	cache->saved_regs[regnum].set_addr (addr);
	133
	134	if (get_frame_memory_unsigned (this_frame, mcontext_addr + 19 * 4, 4))
	135	{
	136	/* The register windows haven't been flushed. */
	137	for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
	138	cache->saved_regs[regnum].set_unknown ();
	139	}
	140	else
	141	{
	142	addr = cache->saved_regs[SPARC_SP_REGNUM].addr ();
	143	addr = get_frame_memory_unsigned (this_frame, addr, 4);
	144	for (regnum = SPARC_L0_REGNUM;
	145	regnum <= SPARC_I7_REGNUM; regnum++, addr += 4)
	146	cache->saved_regs[regnum].set_addr (addr);
	147	}
	148
	149	return cache;
	150	}
	151
	152	static void
	153	sparc32_sol2_sigtramp_frame_this_id (const frame_info_ptr &this_frame,
	154	void **this_cache,
	155	struct frame_id *this_id)
	156	{
	157	struct sparc_frame_cache *cache =
	158	sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache);
	159
	160	(*this_id) = frame_id_build (cache->base, cache->pc);
	161	}
	162
	163	static struct value *
	164	sparc32_sol2_sigtramp_frame_prev_register (const frame_info_ptr &this_frame,
	165	void **this_cache,
	166	int regnum)
	167	{
	168	struct sparc_frame_cache *cache =
	169	sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache);
	170
	171	return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
	172	}
	173
	174	static int
	175	sparc32_sol2_sigtramp_frame_sniffer (const struct frame_unwind *self,
	176	const frame_info_ptr &this_frame,
	177	void **this_cache)
	178	{
	179	return sol2_sigtramp_p (this_frame);
	180	}
	181
	182	static const struct frame_unwind_legacy sparc32_sol2_sigtramp_frame_unwind (
	183	"sparc32 solaris sigtramp",
	184	SIGTRAMP_FRAME,
	185	FRAME_UNWIND_ARCH,
	186	default_frame_unwind_stop_reason,
	187	sparc32_sol2_sigtramp_frame_this_id,
	188	sparc32_sol2_sigtramp_frame_prev_register,
	189	NULL,
	190	sparc32_sol2_sigtramp_frame_sniffer
	191	);
	192
	193	\f
	194
	195	static void
	196	sparc32_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
	197	{
	198	sparc_gdbarch_tdep *tdep = gdbarch_tdep<sparc_gdbarch_tdep> (gdbarch);
	199
	200	tdep->gregset = &sparc32_sol2_gregset;
	201	tdep->sizeof_gregset = 152;
	202
	203	tdep->fpregset = &sparc32_sol2_fpregset;
	204	tdep->sizeof_fpregset = 400;
	205
	206	sol2_init_abi (info, gdbarch);
	207
	208	/* Solaris has SVR4-style shared libraries... */
	209	set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
	210	set_solib_svr4_ops (gdbarch, make_svr4_ilp32_solib_ops);
	211
	212	/* ...which means that we need some special handling when doing
	213	prologue analysis. */
	214	tdep->plt_entry_size = 12;
	215
	216	/* Solaris has kernel-assisted single-stepping support. */
	217	set_gdbarch_software_single_step (gdbarch, NULL);
	218
	219	frame_unwind_append_unwinder (gdbarch, &sparc32_sol2_sigtramp_frame_unwind);
	220	}
	221
	222	INIT_GDB_FILE (sparc_sol2_tdep)
	223	{
	224	gdbarch_register_osabi (bfd_arch_sparc, 0,
	225	GDB_OSABI_SOLARIS, sparc32_sol2_init_abi);
	226	}