250 lines
7.2 KiB
C
250 lines
7.2 KiB
C
/* Target-dependent code for FreeBSD/sparc64.
|
||
|
||
Copyright (C) 2003-2018 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"
|
||
|
||
/* 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].addr = addr + 0 * 8;
|
||
cache->saved_regs[SPARC64_FSR_REGNUM].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].addr = addr + 0 * 8;
|
||
cache->saved_regs[SPARC64_PC_REGNUM].addr = addr + 1 * 8;
|
||
cache->saved_regs[SPARC64_STATE_REGNUM].addr = addr + 2 * 8;
|
||
cache->saved_regs[SPARC64_Y_REGNUM].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].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].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].addr = addr;
|
||
|
||
for (regnum = SPARC64_F32_REGNUM;
|
||
regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8)
|
||
cache->saved_regs[regnum].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 =
|
||
{
|
||
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)
|
||
{
|
||
gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
|
||
GDB_OSABI_FREEBSD, sparc64fbsd_init_abi);
|
||
}
|