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3666a04883
This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
118 lines
4.0 KiB
C
118 lines
4.0 KiB
C
/* Target-dependent code for Solaris.
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Copyright (C) 2006-2021 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 "symtab.h"
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#include "inferior.h"
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#include "objfiles.h"
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#include "sol2-tdep.h"
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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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static int
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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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/* Return whether THIS_FRAME corresponds to a Solaris sigtramp routine. */
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int
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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 sol2_pc_in_sigtramp (pc, name);
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}
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static CORE_ADDR
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sol2_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
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{
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struct bound_minimal_symbol msym;
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msym = lookup_minimal_symbol("elf_bndr", NULL, NULL);
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if (msym.minsym && BMSYMBOL_VALUE_ADDRESS (msym) == pc)
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return frame_unwind_caller_pc (get_current_frame ());
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return 0;
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}
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/* This is how we want PTIDs from Solaris core files to be printed. */
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static std::string
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sol2_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
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{
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struct inferior *inf;
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int pid;
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/* Check whether we're printing an LWP (gdb thread) or a process. */
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pid = ptid.lwp ();
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if (pid != 0)
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{
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/* A thread. */
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return string_printf ("LWP %ld", ptid.lwp ());
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}
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/* GDB didn't use to put a NT_PSTATUS note in Solaris cores. If
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that's missing, then we're dealing with a fake PID corelow.c made up. */
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inf = find_inferior_ptid (current_inferior ()->process_target (), ptid);
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if (inf == NULL || inf->fake_pid_p)
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return "<core>";
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/* Not fake; print as usual. */
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return normal_pid_to_str (ptid);
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}
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/* To be called from GDB_OSABI_SOLARIS handlers. */
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void
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sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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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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/* Solaris uses SVR4-style shared libraries. */
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set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver);
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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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