194 lines
6.0 KiB
C
194 lines
6.0 KiB
C
/* Target-dependent code for Solaris UltraSPARC.
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Copyright (C) 2003, 2004, 2006, 2007, 2008 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 "gdbarch.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 "trad-frame.h"
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#include "gdb_assert.h"
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#include "sol2-tdep.h"
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#include "sparc64-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_gregset sparc64_sol2_gregset =
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{
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32 * 8, /* "tstate" */
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33 * 8, /* %pc */
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34 * 8, /* %npc */
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35 * 8, /* %y */
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-1, /* %wim */
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-1, /* %tbr */
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1 * 8, /* %g1 */
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16 * 8, /* %l0 */
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8 /* sizeof (%y) */
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};
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static struct sparc_frame_cache *
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sparc64_sol2_sigtramp_frame_cache (struct frame_info *next_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 *this_cache;
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cache = sparc_frame_cache (next_frame, this_cache);
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gdb_assert (cache == *this_cache);
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cache->saved_regs = trad_frame_alloc_saved_regs (next_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 = (cache->frameless_p ? SPARC_O2_REGNUM : SPARC_I2_REGNUM);
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mcontext_addr = frame_unwind_register_unsigned (next_frame, regnum) + 64;
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cache->saved_regs[SPARC64_CCR_REGNUM].addr = mcontext_addr + 0 * 8;
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cache->saved_regs[SPARC64_PC_REGNUM].addr = mcontext_addr + 1 * 8;
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cache->saved_regs[SPARC64_NPC_REGNUM].addr = mcontext_addr + 2 * 8;
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cache->saved_regs[SPARC64_Y_REGNUM].addr = mcontext_addr + 3 * 8;
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cache->saved_regs[SPARC64_ASI_REGNUM].addr = mcontext_addr + 19 * 8;
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cache->saved_regs[SPARC64_FPRS_REGNUM].addr = mcontext_addr + 20 * 8;
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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 * 8;
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regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)
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cache->saved_regs[regnum].addr = addr;
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if (get_frame_memory_unsigned (next_frame, mcontext_addr + 21 * 8, 8))
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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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trad_frame_set_unknown (cache->saved_regs, regnum);
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}
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else
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{
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CORE_ADDR sp;
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addr = cache->saved_regs[SPARC_SP_REGNUM].addr;
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sp = get_frame_memory_unsigned (next_frame, addr, 8);
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for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
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regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
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cache->saved_regs[regnum].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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sparc64_sol2_sigtramp_frame_this_id (struct frame_info *next_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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sparc64_sol2_sigtramp_frame_cache (next_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 void
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sparc64_sol2_sigtramp_frame_prev_register (struct frame_info *next_frame,
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void **this_cache,
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int regnum, int *optimizedp,
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enum lval_type *lvalp,
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CORE_ADDR *addrp,
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int *realnump, gdb_byte *valuep)
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{
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struct sparc_frame_cache *cache =
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sparc64_sol2_sigtramp_frame_cache (next_frame, this_cache);
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trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
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optimizedp, lvalp, addrp, realnump, valuep);
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}
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static const struct frame_unwind sparc64_sol2_sigtramp_frame_unwind =
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{
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SIGTRAMP_FRAME,
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sparc64_sol2_sigtramp_frame_this_id,
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sparc64_sol2_sigtramp_frame_prev_register
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};
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static const struct frame_unwind *
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sparc64_sol2_sigtramp_frame_sniffer (struct frame_info *next_frame)
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{
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CORE_ADDR pc = frame_pc_unwind (next_frame);
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char *name;
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find_pc_partial_function (pc, &name, NULL, NULL);
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if (sparc_sol2_pc_in_sigtramp (pc, name))
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return &sparc64_sol2_sigtramp_frame_unwind;
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return NULL;
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}
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void
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sparc64_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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frame_unwind_append_sniffer (gdbarch, sparc64_sol2_sigtramp_frame_sniffer);
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sparc64_init_abi (info, gdbarch);
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/* The Sun compilers (Sun ONE Studio, Forte Developer, Sun WorkShop, SunPRO)
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compiler puts out 0 instead of the address in N_SO stabs. Starting with
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SunPRO 3.0, the compiler does this for N_FUN stabs too. */
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set_gdbarch_sofun_address_maybe_missing (gdbarch, 1);
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/* The Sun compilers also do "globalization"; see the comment in
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sparc_sol2_static_transform_name for more information. */
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set_gdbarch_static_transform_name
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(gdbarch, sparc_sol2_static_transform_name);
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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_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver);
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set_solib_svr4_fetch_link_map_offsets
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(gdbarch, svr4_lp64_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 = 16;
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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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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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void _initialize_sparc64_sol2_tdep (void);
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void
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_initialize_sparc64_sol2_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
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GDB_OSABI_SOLARIS, sparc64_sol2_init_abi);
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}
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