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/* Target-dependent code for FreeBSD/sparc64.
Copyright (C) 2003-2021 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 "defs.h"
#include "frame.h"
#include "frame-unwind.h"
#include "gdbcore.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
#include "target.h"
#include "trad-frame.h"
#include "sparc64-tdep.h"
#include "fbsd-tdep.h"
#include "solib-svr4.h"
#include "gdbarch.h"
/* From <machine/reg.h>. */
const struct sparc_gregmap sparc64fbsd_gregmap =
{
26 * 8, /* "tstate" */
25 * 8, /* %pc */
24 * 8, /* %npc */
28 * 8, /* %y */
16 * 8, /* %fprs */
-1,
1 * 8, /* %g1 */
-1, /* %l0 */
8 /* sizeof (%y) */
};
static void
sparc64fbsd_supply_gregset (const struct regset *regset,
struct regcache *regcache,
int regnum, const void *gregs, size_t len)
{
sparc64_supply_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs);
}
static void
sparc64fbsd_collect_gregset (const struct regset *regset,
const struct regcache *regcache,
int regnum, void *gregs, size_t len)
{
sparc64_collect_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs);
}
static void
sparc64fbsd_supply_fpregset (const struct regset *regset,
struct regcache *regcache,
int regnum, const void *fpregs, size_t len)
{
sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
}
static void
sparc64fbsd_collect_fpregset (const struct regset *regset,
const struct regcache *regcache,
int regnum, void *fpregs, size_t len)
{
sparc64_collect_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
}
/* Signal trampolines. */
static int
sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, const char *name)
{
return (name && strcmp (name, "__sigtramp") == 0);
}
static struct sparc_frame_cache *
sparc64fbsd_sigtramp_frame_cache (struct frame_info *this_frame,
void **this_cache)
{
struct sparc_frame_cache *cache;
CORE_ADDR addr, mcontext_addr, sp;
LONGEST fprs;
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. */
addr = get_frame_register_unsigned (this_frame, SPARC_O2_REGNUM);
mcontext_addr = addr + 64;
/* The following registers travel in the `mc_local' slots of
`mcontext_t'. */
addr = mcontext_addr + 16 * 8;
cache->saved_regs[SPARC64_FPRS_REGNUM].set_addr (addr + 0 * 8);
cache->saved_regs[SPARC64_FSR_REGNUM].set_addr (addr + 1 * 8);
/* The following registers travel in the `mc_in' slots of
`mcontext_t'. */
addr = mcontext_addr + 24 * 8;
cache->saved_regs[SPARC64_NPC_REGNUM].set_addr (addr + 0 * 8);
cache->saved_regs[SPARC64_PC_REGNUM].set_addr (addr + 1 * 8);
cache->saved_regs[SPARC64_STATE_REGNUM].set_addr (addr + 2 * 8);
cache->saved_regs[SPARC64_Y_REGNUM].set_addr (addr + 4 * 8);
/* The `global' and `out' registers travel in the `mc_global' and
`mc_out' slots of `mcontext_t', except for %g0. Since %g0 is
always zero, keep the identity encoding. */
for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8;
regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)
cache->saved_regs[regnum].set_addr (addr);
/* The `local' and `in' registers have been saved in the register
save area. */
addr = cache->saved_regs[SPARC_SP_REGNUM].addr ();
sp = get_frame_memory_unsigned (this_frame, addr, 8);
for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
cache->saved_regs[regnum].set_addr (addr);
/* The floating-point registers are only saved if the FEF bit in
%fprs has been set. */
#define FPRS_FEF (1 << 2)
addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr ();
fprs = get_frame_memory_unsigned (this_frame, addr, 8);
if (fprs & FPRS_FEF)
{
for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8;
regnum <= SPARC_F31_REGNUM; regnum++, addr += 4)
cache->saved_regs[regnum].set_addr (addr);
for (regnum = SPARC64_F32_REGNUM;
regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8)
cache->saved_regs[regnum].set_addr (addr);
}
return cache;
}
static void
sparc64fbsd_sigtramp_frame_this_id (struct frame_info *this_frame,
void **this_cache,
struct frame_id *this_id)
{
struct sparc_frame_cache *cache =
sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
(*this_id) = frame_id_build (cache->base, cache->pc);
}
static struct value *
sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *this_frame,
void **this_cache, int regnum)
{
struct sparc_frame_cache *cache =
sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
}
static int
sparc64fbsd_sigtramp_frame_sniffer (const struct frame_unwind *self,
struct frame_info *this_frame,
void **this_cache)
{
CORE_ADDR pc = get_frame_pc (this_frame);
const char *name;
find_pc_partial_function (pc, &name, NULL, NULL);
if (sparc64fbsd_pc_in_sigtramp (pc, name))
return 1;
return 0;
}
static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind =
{
"sparc64 freebsd sigtramp",
SIGTRAMP_FRAME,
default_frame_unwind_stop_reason,
sparc64fbsd_sigtramp_frame_this_id,
sparc64fbsd_sigtramp_frame_prev_register,
NULL,
sparc64fbsd_sigtramp_frame_sniffer
};
static const struct regset sparc64fbsd_gregset =
{
NULL, sparc64fbsd_supply_gregset, sparc64fbsd_collect_gregset
};
static const struct regset sparc64fbsd_fpregset =
{
NULL, sparc64fbsd_supply_fpregset, sparc64fbsd_collect_fpregset
};
static void
sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* Generic FreeBSD support. */
fbsd_init_abi (info, gdbarch);
tdep->gregset = &sparc64fbsd_gregset;
tdep->sizeof_gregset = 256;
tdep->fpregset = &sparc64fbsd_fpregset;
tdep->sizeof_fpregset = 272;
frame_unwind_append_unwinder (gdbarch, &sparc64fbsd_sigtramp_frame_unwind);
sparc64_init_abi (info, gdbarch);
/* FreeBSD/sparc64 has SVR4-style shared libraries. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_lp64_fetch_link_map_offsets);
}
void _initialize_sparc64fbsd_tdep ();
void
_initialize_sparc64fbsd_tdep ()
{
gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
GDB_OSABI_FREEBSD, sparc64fbsd_init_abi);
}