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sol2-tdep.c
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1/* Target-dependent code for Solaris.
2
3 Copyright (C) 2006-2023 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20#include "defs.h"
21#include "frame.h"
22#include "symtab.h"
23#include "inferior.h"
24#include "objfiles.h"
25
26#include "sol2-tdep.h"
27
28/* The Solaris signal trampolines reside in libc. For normal signals,
29 the function `sigacthandler' is used. This signal trampoline will
30 call the signal handler using the System V calling convention,
31 where the third argument is a pointer to an instance of
32 `ucontext_t', which has a member `uc_mcontext' that contains the
33 saved registers. Incidentally, the kernel passes the `ucontext_t'
34 pointer as the third argument of the signal trampoline too, and
35 `sigacthandler' simply passes it on. However, if you link your
36 program with "-L/usr/ucblib -R/usr/ucblib -lucb", the function
37 `ucbsigvechandler' will be used, which invokes the using the BSD
38 convention, where the third argument is a pointer to an instance of
39 `struct sigcontext'. It is the `ucbsigvechandler' function that
40 converts the `ucontext_t' to a `sigcontext', and back. Unless the
41 signal handler modifies the `struct sigcontext' we can safely
42 ignore this. */
43
44static int
45sol2_pc_in_sigtramp (CORE_ADDR pc, const char *name)
46{
47 return (name && (strcmp (name, "sigacthandler") == 0
48 || strcmp (name, "ucbsigvechandler") == 0
49 || strcmp (name, "__sighndlr") == 0));
50}
51
52/* Return whether THIS_FRAME corresponds to a Solaris sigtramp routine. */
53
54int
56{
57 CORE_ADDR pc = get_frame_pc (this_frame);
58 const char *name;
59
60 find_pc_partial_function (pc, &name, NULL, NULL);
61 return sol2_pc_in_sigtramp (pc, name);
62}
63
64static CORE_ADDR
66{
67 struct bound_minimal_symbol msym;
68
69 msym = lookup_minimal_symbol("elf_bndr", NULL, NULL);
70 if (msym.minsym && msym.value_address () == pc)
72
73 return 0;
74}
75
76/* This is how we want PTIDs from Solaris core files to be printed. */
77
78static std::string
79sol2_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
80{
81 struct inferior *inf;
82 int pid;
83
84 /* Check whether we're printing an LWP (gdb thread) or a process. */
85 pid = ptid.lwp ();
86 if (pid != 0)
87 {
88 /* A thread. */
89 return string_printf ("LWP %ld", ptid.lwp ());
90 }
91
92 /* GDB didn't use to put a NT_PSTATUS note in Solaris cores. If
93 that's missing, then we're dealing with a fake PID corelow.c made up. */
95 if (inf == NULL || inf->fake_pid_p)
96 return "<core>";
97
98 /* Not fake; print as usual. */
99 return normal_pid_to_str (ptid);
100}
101
102/* To be called from GDB_OSABI_SOLARIS handlers. */
103
104void
106{
107 /* The Sun compilers (Sun ONE Studio, Forte Developer, Sun WorkShop, SunPRO)
108 compiler puts out 0 instead of the address in N_SO stabs. Starting with
109 SunPRO 3.0, the compiler does this for N_FUN stabs too. */
111
112 /* Solaris uses SVR4-style shared libraries. */
114
115 /* How to print LWP PTIDs from core files. */
117}
const char *const name
bool find_pc_partial_function(CORE_ADDR pc, const char **name, CORE_ADDR *address, CORE_ADDR *endaddr, const struct block **block)
Definition blockframe.c:373
struct process_stratum_target * process_target()
Definition inferior.h:449
CORE_ADDR frame_unwind_caller_pc(frame_info_ptr this_frame)
Definition frame.c:1042
CORE_ADDR get_frame_pc(frame_info_ptr frame)
Definition frame.c:2712
frame_info_ptr get_current_frame(void)
Definition frame.c:1670
void set_gdbarch_sofun_address_maybe_missing(struct gdbarch *gdbarch, int sofun_address_maybe_missing)
Definition gdbarch.c:4341
void set_gdbarch_core_pid_to_str(struct gdbarch *gdbarch, gdbarch_core_pid_to_str_ftype *core_pid_to_str)
void set_gdbarch_skip_solib_resolver(struct gdbarch *gdbarch, gdbarch_skip_solib_resolver_ftype *skip_solib_resolver)
mach_port_t mach_port_t name mach_port_t mach_port_t name kern_return_t int int rusage_t pid_t pid
Definition gnu-nat.c:1791
struct inferior * find_inferior_ptid(process_stratum_target *targ, ptid_t ptid)
Definition inferior.c:406
struct inferior * current_inferior(void)
Definition inferior.c:55
struct bound_minimal_symbol lookup_minimal_symbol(const char *name, const char *sfile, struct objfile *objf)
Definition minsyms.c:363
static CORE_ADDR sol2_skip_solib_resolver(struct gdbarch *gdbarch, CORE_ADDR pc)
Definition sol2-tdep.c:65
void sol2_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition sol2-tdep.c:105
int sol2_sigtramp_p(frame_info_ptr this_frame)
Definition sol2-tdep.c:55
static int sol2_pc_in_sigtramp(CORE_ADDR pc, const char *name)
Definition sol2-tdep.c:45
static std::string sol2_core_pid_to_str(struct gdbarch *gdbarch, ptid_t ptid)
Definition sol2-tdep.c:79
CORE_ADDR value_address() const
Definition minsyms.h:41
struct minimal_symbol * minsym
Definition minsyms.h:49
Definition gnu-nat.c:153
std::string normal_pid_to_str(ptid_t ptid)
Definition target.c:3693