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/* Target-dependent code for Solaris SPARC.
Copyright (C) 2003-2024 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 "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
};
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 sparc32_sol2_sigtramp_frame_unwind =
{
"sparc32 solaris sigtramp",
SIGTRAMP_FRAME,
default_frame_unwind_stop_reason,
sparc32_sol2_sigtramp_frame_this_id,
sparc32_sol2_sigtramp_frame_prev_register,
NULL,
sparc32_sol2_sigtramp_frame_sniffer
};
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_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
/* ...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);
}
void _initialize_sparc_sol2_tdep ();
void
_initialize_sparc_sol2_tdep ()
{
gdbarch_register_osabi (bfd_arch_sparc, 0,
GDB_OSABI_SOLARIS, sparc32_sol2_init_abi);
}
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