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ff1eb2b544
Remove native-only core file handling on Sparc Solaris. Instead, enable the sparc target generic core regset logic on Solaris by providing appropriate register offset maps. Thanks to Joel Brobecker for testing! gdb/ * config/sparc/sol2.mh (NATDEPFILES): Remove core-regset.o. * sparc-sol2-tdep.c: Include "regset.h". (sparc32_sol2_supply_core_gregset): New function. (sparc32_sol2_collect_core_gregset): Likewise. (sparc32_sol2_supply_core_fpregset): Likewise. (sparc32_sol2_collect_core_fpregset): Likewise. (sparc32_sol2_gregset, sparc32_sol2_fpregset): New variables. (sparc32_sol2_init_abi): Set tdep->gregset/sizeof_gregset and tdep->fpregset/sizeof_fpregset. * sparc64-sol2-tdep.c: Include "regset.h". (sparc64_sol2_supply_core_gregset): New function. (sparc64_sol2_collect_core_gregset): Likewise. (sparc64_sol2_supply_core_fpregset): Likewise. (sparc64_sol2_collect_core_fpregset): Likewise. (sparc64_sol2_gregset, sparc64_sol2_fpregset): New variables. (sparc64_sol2_init_abi): Set tdep->gregset/sizeof_gregset and tdep->fpregset/sizeof_fpregset.
306 lines
9.6 KiB
C
306 lines
9.6 KiB
C
/* Target-dependent code for Solaris SPARC.
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Copyright (C) 2003-2014 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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/* The Solaris signal trampolines reside in libc. For normal signals,
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the function `sigacthandler' is used. This signal trampoline will
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call the signal handler using the System V calling convention,
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where the third argument is a pointer to an instance of
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`ucontext_t', which has a member `uc_mcontext' that contains the
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saved registers. Incidentally, the kernel passes the `ucontext_t'
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pointer as the third argument of the signal trampoline too, and
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`sigacthandler' simply passes it on. However, if you link your
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program with "-L/usr/ucblib -R/usr/ucblib -lucb", the function
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`ucbsigvechandler' will be used, which invokes the using the BSD
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convention, where the third argument is a pointer to an instance of
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`struct sigcontext'. It is the `ucbsigvechandler' function that
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converts the `ucontext_t' to a `sigcontext', and back. Unless the
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signal handler modifies the `struct sigcontext' we can safely
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ignore this. */
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int
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sparc_sol2_pc_in_sigtramp (CORE_ADDR pc, const char *name)
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{
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return (name && (strcmp (name, "sigacthandler") == 0
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|| strcmp (name, "ucbsigvechandler") == 0
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|| strcmp (name, "__sighndlr") == 0));
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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 *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].addr = mcontext_addr + 0 * 4;
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cache->saved_regs[SPARC32_PC_REGNUM].addr = mcontext_addr + 1 * 4;
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cache->saved_regs[SPARC32_NPC_REGNUM].addr = mcontext_addr + 2 * 4;
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cache->saved_regs[SPARC32_Y_REGNUM].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].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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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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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].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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CORE_ADDR pc = get_frame_pc (this_frame);
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const 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 1;
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return 0;
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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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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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/* Unglobalize NAME. */
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const const char *
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sparc_sol2_static_transform_name (const char *name)
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{
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/* The Sun compilers (Sun ONE Studio, Forte Developer, Sun WorkShop,
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SunPRO) convert file static variables into global values, a
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process known as globalization. In order to do this, the
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compiler will create a unique prefix and prepend it to each file
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static variable. For static variables within a function, this
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globalization prefix is followed by the function name (nested
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static variables within a function are supposed to generate a
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warning message, and are left alone). The procedure is
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documented in the Stabs Interface Manual, which is distrubuted
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with the compilers, although version 4.0 of the manual seems to
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be incorrect in some places, at least for SPARC. The
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globalization prefix is encoded into an N_OPT stab, with the form
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"G=<prefix>". The globalization prefix always seems to start
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with a dollar sign '$'; a dot '.' is used as a seperator. So we
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simply strip everything up until the last dot. */
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if (name[0] == '$')
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{
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char *p = strrchr (name, '.');
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if (p)
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return p + 1;
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}
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return name;
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}
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void
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sparc32_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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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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/* 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_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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/* How to print LWP PTIDs from core files. */
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set_gdbarch_core_pid_to_str (gdbarch, sol2_core_pid_to_str);
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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void _initialize_sparc_sol2_tdep (void);
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void
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_initialize_sparc_sol2_tdep (void)
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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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