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/* Target-dependent code for FreeBSD/sparc64.
Copyright 2003, 2004 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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#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 "gdb_assert.h"
#include "gdb_string.h"
#include "sparc64-tdep.h"
/* From <machine/reg.h>. */
const struct sparc_gregset sparc64fbsd_gregset =
{
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 (regset->descr, 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 (regcache, regnum, fpregs);
}
/* Signal trampolines. */
static int
sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
{
return (name && strcmp (name, "__sigtramp") == 0);
}
static struct sparc_frame_cache *
sparc64fbsd_sigtramp_frame_cache (struct frame_info *next_frame,
void **this_cache)
{
struct sparc_frame_cache *cache;
CORE_ADDR addr, mcontext_addr, sp;
LONGEST fprs;
int regnum;
if (*this_cache)
return *this_cache;
cache = sparc_frame_cache (next_frame, this_cache);
gdb_assert (cache == *this_cache);
cache->saved_regs = trad_frame_alloc_saved_regs (next_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 = frame_unwind_register_unsigned (next_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 (next_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 (next_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 *next_frame,
void **this_cache,
struct frame_id *this_id)
{
struct sparc_frame_cache *cache =
sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache);
(*this_id) = frame_id_build (cache->base, cache->pc);
}
static void
sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *next_frame,
void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp,
CORE_ADDR *addrp,
int *realnump, void *valuep)
{
struct sparc_frame_cache *cache =
sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache);
trad_frame_prev_register (next_frame, cache->saved_regs, regnum,
optimizedp, lvalp, addrp, realnump, valuep);
}
static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind =
{
SIGTRAMP_FRAME,
sparc64fbsd_sigtramp_frame_this_id,
sparc64fbsd_sigtramp_frame_prev_register
};
static const struct frame_unwind *
sparc64fbsd_sigtramp_frame_sniffer (struct frame_info *next_frame)
{
CORE_ADDR pc = frame_pc_unwind (next_frame);
char *name;
find_pc_partial_function (pc, &name, NULL, NULL);
if (sparc64fbsd_pc_in_sigtramp (pc, name))
return &sparc64fbsd_sigtramp_frame_unwind;
return NULL;
}
static void
sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
tdep->gregset = XMALLOC (struct regset);
tdep->gregset->descr = &sparc64fbsd_gregset;
tdep->gregset->supply_regset = sparc64fbsd_supply_gregset;
tdep->sizeof_gregset = 256;
tdep->fpregset = XMALLOC (struct regset);
tdep->fpregset->supply_regset = sparc64fbsd_supply_fpregset;
tdep->sizeof_fpregset = 272;
frame_unwind_append_sniffer (gdbarch, sparc64fbsd_sigtramp_frame_sniffer);
sparc64_init_abi (info, gdbarch);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_sparc64fbsd_tdep (void);
void
_initialize_sparc64fbsd_tdep (void)
{
gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi);
}
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