230 lines
6.6 KiB
C
230 lines
6.6 KiB
C
/* Target-dependent code for Solaris SPARC.
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Copyright (C) 2003-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "frame.h"
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#include "frame-unwind.h"
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#include "gdbcore.h"
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#include "symtab.h"
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#include "objfiles.h"
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#include "osabi.h"
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#include "regcache.h"
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#include "regset.h"
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#include "target.h"
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#include "trad-frame.h"
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#include "sol2-tdep.h"
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#include "sparc-tdep.h"
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#include "solib-svr4.h"
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/* From <sys/regset.h>. */
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const struct sparc_gregmap sparc32_sol2_gregmap =
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{
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32 * 4, /* %psr */
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33 * 4, /* %pc */
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34 * 4, /* %npc */
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35 * 4, /* %y */
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36 * 4, /* %wim */
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37 * 4, /* %tbr */
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1 * 4, /* %g1 */
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16 * 4, /* %l0 */
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};
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const struct sparc_fpregmap sparc32_sol2_fpregmap =
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{
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0 * 4, /* %f0 */
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33 * 4, /* %fsr */
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};
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static void
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sparc32_sol2_supply_core_gregset (const struct regset *regset,
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struct regcache *regcache,
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int regnum, const void *gregs, size_t len)
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{
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sparc32_supply_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs);
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}
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static void
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sparc32_sol2_collect_core_gregset (const struct regset *regset,
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const struct regcache *regcache,
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int regnum, void *gregs, size_t len)
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{
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sparc32_collect_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs);
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}
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static void
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sparc32_sol2_supply_core_fpregset (const struct regset *regset,
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struct regcache *regcache,
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int regnum, const void *fpregs, size_t len)
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{
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sparc32_supply_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs);
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}
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static void
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sparc32_sol2_collect_core_fpregset (const struct regset *regset,
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const struct regcache *regcache,
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int regnum, void *fpregs, size_t len)
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{
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sparc32_collect_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs);
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}
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static const struct regset sparc32_sol2_gregset =
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{
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NULL,
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sparc32_sol2_supply_core_gregset,
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sparc32_sol2_collect_core_gregset
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};
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static const struct regset sparc32_sol2_fpregset =
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{
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NULL,
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sparc32_sol2_supply_core_fpregset,
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sparc32_sol2_collect_core_fpregset
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};
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static struct sparc_frame_cache *
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sparc32_sol2_sigtramp_frame_cache (struct frame_info *this_frame,
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void **this_cache)
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{
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struct sparc_frame_cache *cache;
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CORE_ADDR mcontext_addr, addr;
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int regnum;
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if (*this_cache)
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return (struct sparc_frame_cache *) *this_cache;
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cache = sparc_frame_cache (this_frame, this_cache);
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gdb_assert (cache == *this_cache);
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cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
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/* The third argument is a pointer to an instance of `ucontext_t',
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which has a member `uc_mcontext' that contains the saved
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registers. */
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regnum =
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(cache->copied_regs_mask & 0x04) ? SPARC_I2_REGNUM : SPARC_O2_REGNUM;
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mcontext_addr = get_frame_register_unsigned (this_frame, regnum) + 40;
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cache->saved_regs[SPARC32_PSR_REGNUM].set_addr (mcontext_addr + 0 * 4);
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cache->saved_regs[SPARC32_PC_REGNUM].set_addr (mcontext_addr + 1 * 4);
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cache->saved_regs[SPARC32_NPC_REGNUM].set_addr (mcontext_addr + 2 * 4);
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cache->saved_regs[SPARC32_Y_REGNUM].set_addr (mcontext_addr + 3 * 4);
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/* Since %g0 is always zero, keep the identity encoding. */
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for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 4;
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regnum <= SPARC_O7_REGNUM; regnum++, addr += 4)
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cache->saved_regs[regnum].set_addr (addr);
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if (get_frame_memory_unsigned (this_frame, mcontext_addr + 19 * 4, 4))
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{
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/* The register windows haven't been flushed. */
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for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
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cache->saved_regs[regnum].set_unknown ();
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}
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else
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{
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addr = cache->saved_regs[SPARC_SP_REGNUM].addr ();
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addr = get_frame_memory_unsigned (this_frame, addr, 4);
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for (regnum = SPARC_L0_REGNUM;
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regnum <= SPARC_I7_REGNUM; regnum++, addr += 4)
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cache->saved_regs[regnum].set_addr (addr);
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}
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return cache;
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}
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static void
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sparc32_sol2_sigtramp_frame_this_id (struct frame_info *this_frame,
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void **this_cache,
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struct frame_id *this_id)
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{
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struct sparc_frame_cache *cache =
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sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache);
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(*this_id) = frame_id_build (cache->base, cache->pc);
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}
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static struct value *
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sparc32_sol2_sigtramp_frame_prev_register (struct frame_info *this_frame,
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void **this_cache,
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int regnum)
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{
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struct sparc_frame_cache *cache =
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sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache);
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return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
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}
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static int
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sparc32_sol2_sigtramp_frame_sniffer (const struct frame_unwind *self,
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struct frame_info *this_frame,
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void **this_cache)
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{
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return sol2_sigtramp_p (this_frame);
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}
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static const struct frame_unwind sparc32_sol2_sigtramp_frame_unwind =
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{
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"sparc32 solaris sigtramp",
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SIGTRAMP_FRAME,
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default_frame_unwind_stop_reason,
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sparc32_sol2_sigtramp_frame_this_id,
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sparc32_sol2_sigtramp_frame_prev_register,
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NULL,
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sparc32_sol2_sigtramp_frame_sniffer
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};
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static void
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sparc32_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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sparc_gdbarch_tdep *tdep = (sparc_gdbarch_tdep *) gdbarch_tdep (gdbarch);
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tdep->gregset = &sparc32_sol2_gregset;
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tdep->sizeof_gregset = 152;
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tdep->fpregset = &sparc32_sol2_fpregset;
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tdep->sizeof_fpregset = 400;
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sol2_init_abi (info, gdbarch);
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/* Solaris has SVR4-style shared libraries... */
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set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
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set_solib_svr4_fetch_link_map_offsets
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(gdbarch, svr4_ilp32_fetch_link_map_offsets);
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/* ...which means that we need some special handling when doing
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prologue analysis. */
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tdep->plt_entry_size = 12;
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/* Solaris has kernel-assisted single-stepping support. */
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set_gdbarch_software_single_step (gdbarch, NULL);
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frame_unwind_append_unwinder (gdbarch, &sparc32_sol2_sigtramp_frame_unwind);
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}
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void _initialize_sparc_sol2_tdep ();
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void
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_initialize_sparc_sol2_tdep ()
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{
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gdbarch_register_osabi (bfd_arch_sparc, 0,
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GDB_OSABI_SOLARIS, sparc32_sol2_init_abi);
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}
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