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1db88d2272
Unlike Solaris/SPARC, the __sighndlr function isn't recognized as part of a signal handler, causing a couple of testcases to fail. The following patch fixes that. A followup patch will move this to common code to avoid such unnecessary discrepancies between Solaris/SPARC and x86 in the future. While this fixes a couple of backtraces to now correctly print #1 <signal handler called> they often fail later with #2 0x0ff3ffffff00857f in ?? () Backtrace stopped: Cannot access memory at address 0xff3000002e0886f which needs further investigation. Tested on amd64-pc-solaris2.11 (running the tests with both -m64 and -m32). * amd64-sol2-tdep.c (amd64_sol2_sigtramp_p): Also recognize __sighndlr. * i386-sol2-tdep.c (i386_sol2_sigtramp_p): Likewise.
127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/* Target-dependent code for AMD64 Solaris.
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Copyright (C) 2001-2018 Free Software Foundation, Inc.
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Contributed by Joseph Myers, CodeSourcery, LLC.
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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 "gdbcore.h"
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#include "regcache.h"
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#include "osabi.h"
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#include "symtab.h"
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#include "sol2-tdep.h"
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#include "amd64-tdep.h"
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#include "x86-xstate.h"
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#include "solib-svr4.h"
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/* Mapping between the general-purpose registers in gregset_t format
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and GDB's register cache layout. */
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/* From <sys/regset.h>. */
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static int amd64_sol2_gregset_reg_offset[] = {
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14 * 8, /* %rax */
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11 * 8, /* %rbx */
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13 * 8, /* %rcx */
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12 * 8, /* %rdx */
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9 * 8, /* %rsi */
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8 * 8, /* %rdi */
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10 * 8, /* %rbp */
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20 * 8, /* %rsp */
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7 * 8, /* %r8 ... */
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6 * 8,
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5 * 8,
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4 * 8,
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3 * 8,
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2 * 8,
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1 * 8,
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0 * 8, /* ... %r15 */
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17 * 8, /* %rip */
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19 * 8, /* %eflags */
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18 * 8, /* %cs */
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21 * 8, /* %ss */
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25 * 8, /* %ds */
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24 * 8, /* %es */
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22 * 8, /* %fs */
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23 * 8 /* %gs */
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};
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/* Return whether THIS_FRAME corresponds to a Solaris sigtramp
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routine. */
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static int
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amd64_sol2_sigtramp_p (struct frame_info *this_frame)
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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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return (name && (strcmp ("sigacthandler", name) == 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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/* Solaris doesn't have a 'struct sigcontext', but it does have a
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'mcontext_t' that contains the saved set of machine registers. */
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static CORE_ADDR
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amd64_sol2_mcontext_addr (struct frame_info *this_frame)
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{
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CORE_ADDR sp, ucontext_addr;
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sp = get_frame_register_unsigned (this_frame, AMD64_RSP_REGNUM);
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ucontext_addr = get_frame_memory_unsigned (this_frame, sp + 8, 8);
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return ucontext_addr + 72;
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}
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static void
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amd64_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_reg_offset = amd64_sol2_gregset_reg_offset;
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tdep->gregset_num_regs = ARRAY_SIZE (amd64_sol2_gregset_reg_offset);
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tdep->sizeof_gregset = 28 * 8;
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amd64_init_abi (info, gdbarch,
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amd64_target_description (X86_XSTATE_SSE_MASK, true));
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tdep->sigtramp_p = amd64_sol2_sigtramp_p;
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tdep->sigcontext_addr = amd64_sol2_mcontext_addr;
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tdep->sc_reg_offset = tdep->gregset_reg_offset;
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tdep->sc_num_regs = tdep->gregset_num_regs;
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/* Solaris uses SVR4-style shared libraries. */
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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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/* 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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void
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_initialize_amd64_sol2_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
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GDB_OSABI_SOLARIS, amd64_sol2_init_abi);
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}
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