2411 lines
70 KiB
C
2411 lines
70 KiB
C
/* Target-dependent code for GNU/Linux, architecture independent.
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Copyright (C) 2009-2015 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 "gdbtypes.h"
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#include "linux-tdep.h"
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#include "auxv.h"
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#include "target.h"
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#include "gdbthread.h"
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#include "gdbcore.h"
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#include "regcache.h"
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#include "regset.h"
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#include "elf/common.h"
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#include "elf-bfd.h" /* for elfcore_write_* */
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#include "inferior.h"
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#include "cli/cli-utils.h"
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#include "arch-utils.h"
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#include "gdb_obstack.h"
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#include "observer.h"
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#include "objfiles.h"
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#include "infcall.h"
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#include "gdbcmd.h"
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#include "gdb_regex.h"
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#include <ctype.h>
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/* This enum represents the values that the user can choose when
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informing the Linux kernel about which memory mappings will be
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dumped in a corefile. They are described in the file
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Documentation/filesystems/proc.txt, inside the Linux kernel
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tree. */
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enum
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{
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COREFILTER_ANON_PRIVATE = 1 << 0,
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COREFILTER_ANON_SHARED = 1 << 1,
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COREFILTER_MAPPED_PRIVATE = 1 << 2,
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COREFILTER_MAPPED_SHARED = 1 << 3,
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COREFILTER_ELF_HEADERS = 1 << 4,
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COREFILTER_HUGETLB_PRIVATE = 1 << 5,
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COREFILTER_HUGETLB_SHARED = 1 << 6,
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};
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/* This struct is used to map flags found in the "VmFlags:" field (in
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the /proc/<PID>/smaps file). */
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struct smaps_vmflags
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{
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/* Zero if this structure has not been initialized yet. It
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probably means that the Linux kernel being used does not emit
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the "VmFlags:" field on "/proc/PID/smaps". */
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unsigned int initialized_p : 1;
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/* Memory mapped I/O area (VM_IO, "io"). */
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unsigned int io_page : 1;
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/* Area uses huge TLB pages (VM_HUGETLB, "ht"). */
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unsigned int uses_huge_tlb : 1;
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/* Do not include this memory region on the coredump (VM_DONTDUMP, "dd"). */
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unsigned int exclude_coredump : 1;
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/* Is this a MAP_SHARED mapping (VM_SHARED, "sh"). */
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unsigned int shared_mapping : 1;
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};
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/* Whether to take the /proc/PID/coredump_filter into account when
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generating a corefile. */
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static int use_coredump_filter = 1;
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/* This enum represents the signals' numbers on a generic architecture
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running the Linux kernel. The definition of "generic" comes from
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the file <include/uapi/asm-generic/signal.h>, from the Linux kernel
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tree, which is the "de facto" implementation of signal numbers to
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be used by new architecture ports.
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For those architectures which have differences between the generic
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standard (e.g., Alpha), we define the different signals (and *only*
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those) in the specific target-dependent file (e.g.,
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alpha-linux-tdep.c, for Alpha). Please refer to the architecture's
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tdep file for more information.
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ARM deserves a special mention here. On the file
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<arch/arm/include/uapi/asm/signal.h>, it defines only one different
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(and ARM-only) signal, which is SIGSWI, with the same number as
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SIGRTMIN. This signal is used only for a very specific target,
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called ArthurOS (from RISCOS). Therefore, we do not handle it on
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the ARM-tdep file, and we can safely use the generic signal handler
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here for ARM targets.
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As stated above, this enum is derived from
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<include/uapi/asm-generic/signal.h>, from the Linux kernel
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tree. */
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enum
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{
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LINUX_SIGHUP = 1,
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LINUX_SIGINT = 2,
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LINUX_SIGQUIT = 3,
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LINUX_SIGILL = 4,
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LINUX_SIGTRAP = 5,
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LINUX_SIGABRT = 6,
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LINUX_SIGIOT = 6,
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LINUX_SIGBUS = 7,
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LINUX_SIGFPE = 8,
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LINUX_SIGKILL = 9,
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LINUX_SIGUSR1 = 10,
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LINUX_SIGSEGV = 11,
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LINUX_SIGUSR2 = 12,
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LINUX_SIGPIPE = 13,
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LINUX_SIGALRM = 14,
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LINUX_SIGTERM = 15,
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LINUX_SIGSTKFLT = 16,
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LINUX_SIGCHLD = 17,
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LINUX_SIGCONT = 18,
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LINUX_SIGSTOP = 19,
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LINUX_SIGTSTP = 20,
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LINUX_SIGTTIN = 21,
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LINUX_SIGTTOU = 22,
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LINUX_SIGURG = 23,
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LINUX_SIGXCPU = 24,
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LINUX_SIGXFSZ = 25,
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LINUX_SIGVTALRM = 26,
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LINUX_SIGPROF = 27,
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LINUX_SIGWINCH = 28,
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LINUX_SIGIO = 29,
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LINUX_SIGPOLL = LINUX_SIGIO,
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LINUX_SIGPWR = 30,
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LINUX_SIGSYS = 31,
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LINUX_SIGUNUSED = 31,
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LINUX_SIGRTMIN = 32,
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LINUX_SIGRTMAX = 64,
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};
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static struct gdbarch_data *linux_gdbarch_data_handle;
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struct linux_gdbarch_data
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{
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struct type *siginfo_type;
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};
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static void *
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init_linux_gdbarch_data (struct gdbarch *gdbarch)
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{
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return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct linux_gdbarch_data);
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}
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static struct linux_gdbarch_data *
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get_linux_gdbarch_data (struct gdbarch *gdbarch)
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{
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return gdbarch_data (gdbarch, linux_gdbarch_data_handle);
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}
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/* Per-inferior data key. */
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static const struct inferior_data *linux_inferior_data;
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/* Linux-specific cached data. This is used by GDB for caching
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purposes for each inferior. This helps reduce the overhead of
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transfering data from a remote target to the local host. */
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struct linux_info
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{
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/* Cache of the inferior's vsyscall/vDSO mapping range. Only valid
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if VSYSCALL_RANGE_P is positive. This is cached because getting
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at this info requires an auxv lookup (which is itself cached),
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and looking through the inferior's mappings (which change
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throughout execution and therefore cannot be cached). */
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struct mem_range vsyscall_range;
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/* Zero if we haven't tried looking up the vsyscall's range before
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yet. Positive if we tried looking it up, and found it. Negative
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if we tried looking it up but failed. */
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int vsyscall_range_p;
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};
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/* Frees whatever allocated space there is to be freed and sets INF's
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linux cache data pointer to NULL. */
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static void
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invalidate_linux_cache_inf (struct inferior *inf)
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{
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struct linux_info *info;
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info = inferior_data (inf, linux_inferior_data);
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if (info != NULL)
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{
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xfree (info);
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set_inferior_data (inf, linux_inferior_data, NULL);
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}
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}
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/* Handles the cleanup of the linux cache for inferior INF. ARG is
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ignored. Callback for the inferior_appeared and inferior_exit
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events. */
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static void
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linux_inferior_data_cleanup (struct inferior *inf, void *arg)
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{
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invalidate_linux_cache_inf (inf);
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}
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/* Fetch the linux cache info for INF. This function always returns a
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valid INFO pointer. */
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static struct linux_info *
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get_linux_inferior_data (void)
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{
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struct linux_info *info;
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struct inferior *inf = current_inferior ();
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info = inferior_data (inf, linux_inferior_data);
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if (info == NULL)
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{
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info = XCNEW (struct linux_info);
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set_inferior_data (inf, linux_inferior_data, info);
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}
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return info;
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}
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/* This function is suitable for architectures that don't
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extend/override the standard siginfo structure. */
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struct type *
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linux_get_siginfo_type (struct gdbarch *gdbarch)
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{
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struct linux_gdbarch_data *linux_gdbarch_data;
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struct type *int_type, *uint_type, *long_type, *void_ptr_type;
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struct type *uid_type, *pid_type;
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struct type *sigval_type, *clock_type;
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struct type *siginfo_type, *sifields_type;
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struct type *type;
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linux_gdbarch_data = get_linux_gdbarch_data (gdbarch);
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if (linux_gdbarch_data->siginfo_type != NULL)
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return linux_gdbarch_data->siginfo_type;
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int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
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0, "int");
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uint_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
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1, "unsigned int");
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long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
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0, "long");
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void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
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/* sival_t */
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sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
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TYPE_NAME (sigval_type) = xstrdup ("sigval_t");
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append_composite_type_field (sigval_type, "sival_int", int_type);
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append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type);
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/* __pid_t */
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pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
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TYPE_LENGTH (int_type), "__pid_t");
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TYPE_TARGET_TYPE (pid_type) = int_type;
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TYPE_TARGET_STUB (pid_type) = 1;
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/* __uid_t */
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uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
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TYPE_LENGTH (uint_type), "__uid_t");
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TYPE_TARGET_TYPE (uid_type) = uint_type;
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TYPE_TARGET_STUB (uid_type) = 1;
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/* __clock_t */
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clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
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TYPE_LENGTH (long_type), "__clock_t");
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TYPE_TARGET_TYPE (clock_type) = long_type;
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TYPE_TARGET_STUB (clock_type) = 1;
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/* _sifields */
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sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
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{
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const int si_max_size = 128;
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int si_pad_size;
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int size_of_int = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
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/* _pad */
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if (gdbarch_ptr_bit (gdbarch) == 64)
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si_pad_size = (si_max_size / size_of_int) - 4;
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else
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si_pad_size = (si_max_size / size_of_int) - 3;
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append_composite_type_field (sifields_type, "_pad",
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init_vector_type (int_type, si_pad_size));
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}
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/* _kill */
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type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
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append_composite_type_field (type, "si_pid", pid_type);
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append_composite_type_field (type, "si_uid", uid_type);
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append_composite_type_field (sifields_type, "_kill", type);
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/* _timer */
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type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
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append_composite_type_field (type, "si_tid", int_type);
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append_composite_type_field (type, "si_overrun", int_type);
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append_composite_type_field (type, "si_sigval", sigval_type);
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append_composite_type_field (sifields_type, "_timer", type);
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/* _rt */
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type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
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append_composite_type_field (type, "si_pid", pid_type);
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append_composite_type_field (type, "si_uid", uid_type);
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append_composite_type_field (type, "si_sigval", sigval_type);
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append_composite_type_field (sifields_type, "_rt", type);
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/* _sigchld */
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type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
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append_composite_type_field (type, "si_pid", pid_type);
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append_composite_type_field (type, "si_uid", uid_type);
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append_composite_type_field (type, "si_status", int_type);
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append_composite_type_field (type, "si_utime", clock_type);
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append_composite_type_field (type, "si_stime", clock_type);
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append_composite_type_field (sifields_type, "_sigchld", type);
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/* _sigfault */
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type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
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append_composite_type_field (type, "si_addr", void_ptr_type);
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append_composite_type_field (sifields_type, "_sigfault", type);
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/* _sigpoll */
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type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
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append_composite_type_field (type, "si_band", long_type);
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append_composite_type_field (type, "si_fd", int_type);
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append_composite_type_field (sifields_type, "_sigpoll", type);
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/* struct siginfo */
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siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
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TYPE_NAME (siginfo_type) = xstrdup ("siginfo");
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append_composite_type_field (siginfo_type, "si_signo", int_type);
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append_composite_type_field (siginfo_type, "si_errno", int_type);
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append_composite_type_field (siginfo_type, "si_code", int_type);
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append_composite_type_field_aligned (siginfo_type,
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"_sifields", sifields_type,
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TYPE_LENGTH (long_type));
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linux_gdbarch_data->siginfo_type = siginfo_type;
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return siginfo_type;
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}
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/* Return true if the target is running on uClinux instead of normal
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Linux kernel. */
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int
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linux_is_uclinux (void)
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{
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CORE_ADDR dummy;
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return (target_auxv_search (¤t_target, AT_NULL, &dummy) > 0
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&& target_auxv_search (¤t_target, AT_PAGESZ, &dummy) == 0);
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}
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static int
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linux_has_shared_address_space (struct gdbarch *gdbarch)
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{
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return linux_is_uclinux ();
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}
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/* This is how we want PTIDs from core files to be printed. */
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static char *
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linux_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
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{
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static char buf[80];
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if (ptid_get_lwp (ptid) != 0)
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{
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snprintf (buf, sizeof (buf), "LWP %ld", ptid_get_lwp (ptid));
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return buf;
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}
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return normal_pid_to_str (ptid);
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}
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/* Service function for corefiles and info proc. */
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static void
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read_mapping (const char *line,
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ULONGEST *addr, ULONGEST *endaddr,
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const char **permissions, size_t *permissions_len,
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ULONGEST *offset,
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const char **device, size_t *device_len,
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ULONGEST *inode,
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const char **filename)
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{
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const char *p = line;
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*addr = strtoulst (p, &p, 16);
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if (*p == '-')
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p++;
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*endaddr = strtoulst (p, &p, 16);
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p = skip_spaces_const (p);
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*permissions = p;
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while (*p && !isspace (*p))
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p++;
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*permissions_len = p - *permissions;
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*offset = strtoulst (p, &p, 16);
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p = skip_spaces_const (p);
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*device = p;
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while (*p && !isspace (*p))
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p++;
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*device_len = p - *device;
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*inode = strtoulst (p, &p, 10);
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p = skip_spaces_const (p);
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*filename = p;
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}
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/* Helper function to decode the "VmFlags" field in /proc/PID/smaps.
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This function was based on the documentation found on
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<Documentation/filesystems/proc.txt>, on the Linux kernel.
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Linux kernels before commit
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834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have this
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field on smaps. */
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static void
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decode_vmflags (char *p, struct smaps_vmflags *v)
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{
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char *saveptr;
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const char *s;
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v->initialized_p = 1;
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p = skip_to_space (p);
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p = skip_spaces (p);
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for (s = strtok_r (p, " ", &saveptr);
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s != NULL;
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s = strtok_r (NULL, " ", &saveptr))
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{
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if (strcmp (s, "io") == 0)
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v->io_page = 1;
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else if (strcmp (s, "ht") == 0)
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v->uses_huge_tlb = 1;
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else if (strcmp (s, "dd") == 0)
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v->exclude_coredump = 1;
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else if (strcmp (s, "sh") == 0)
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v->shared_mapping = 1;
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}
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}
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/* Return 1 if the memory mapping is anonymous, 0 otherwise.
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FILENAME is the name of the file present in the first line of the
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memory mapping, in the "/proc/PID/smaps" output. For example, if
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the first line is:
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7fd0ca877000-7fd0d0da0000 r--p 00000000 fd:02 2100770 /path/to/file
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Then FILENAME will be "/path/to/file". */
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static int
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mapping_is_anonymous_p (const char *filename)
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{
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static regex_t dev_zero_regex, shmem_file_regex, file_deleted_regex;
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static int init_regex_p = 0;
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|
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if (!init_regex_p)
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{
|
|
struct cleanup *c = make_cleanup (null_cleanup, NULL);
|
|
|
|
/* Let's be pessimistic and assume there will be an error while
|
|
compiling the regex'es. */
|
|
init_regex_p = -1;
|
|
|
|
/* DEV_ZERO_REGEX matches "/dev/zero" filenames (with or
|
|
without the "(deleted)" string in the end). We know for
|
|
sure, based on the Linux kernel code, that memory mappings
|
|
whose associated filename is "/dev/zero" are guaranteed to be
|
|
MAP_ANONYMOUS. */
|
|
compile_rx_or_error (&dev_zero_regex, "^/dev/zero\\( (deleted)\\)\\?$",
|
|
_("Could not compile regex to match /dev/zero "
|
|
"filename"));
|
|
/* SHMEM_FILE_REGEX matches "/SYSV%08x" filenames (with or
|
|
without the "(deleted)" string in the end). These filenames
|
|
refer to shared memory (shmem), and memory mappings
|
|
associated with them are MAP_ANONYMOUS as well. */
|
|
compile_rx_or_error (&shmem_file_regex,
|
|
"^/\\?SYSV[0-9a-fA-F]\\{8\\}\\( (deleted)\\)\\?$",
|
|
_("Could not compile regex to match shmem "
|
|
"filenames"));
|
|
/* FILE_DELETED_REGEX is a heuristic we use to try to mimic the
|
|
Linux kernel's 'n_link == 0' code, which is responsible to
|
|
decide if it is dealing with a 'MAP_SHARED | MAP_ANONYMOUS'
|
|
mapping. In other words, if FILE_DELETED_REGEX matches, it
|
|
does not necessarily mean that we are dealing with an
|
|
anonymous shared mapping. However, there is no easy way to
|
|
detect this currently, so this is the best approximation we
|
|
have.
|
|
|
|
As a result, GDB will dump readonly pages of deleted
|
|
executables when using the default value of coredump_filter
|
|
(0x33), while the Linux kernel will not dump those pages.
|
|
But we can live with that. */
|
|
compile_rx_or_error (&file_deleted_regex, " (deleted)$",
|
|
_("Could not compile regex to match "
|
|
"'<file> (deleted)'"));
|
|
/* We will never release these regexes, so just discard the
|
|
cleanups. */
|
|
discard_cleanups (c);
|
|
|
|
/* If we reached this point, then everything succeeded. */
|
|
init_regex_p = 1;
|
|
}
|
|
|
|
if (init_regex_p == -1)
|
|
{
|
|
const char deleted[] = " (deleted)";
|
|
size_t del_len = sizeof (deleted) - 1;
|
|
size_t filename_len = strlen (filename);
|
|
|
|
/* There was an error while compiling the regex'es above. In
|
|
order to try to give some reliable information to the caller,
|
|
we just try to find the string " (deleted)" in the filename.
|
|
If we managed to find it, then we assume the mapping is
|
|
anonymous. */
|
|
return (filename_len >= del_len
|
|
&& strcmp (filename + filename_len - del_len, deleted) == 0);
|
|
}
|
|
|
|
if (*filename == '\0'
|
|
|| regexec (&dev_zero_regex, filename, 0, NULL, 0) == 0
|
|
|| regexec (&shmem_file_regex, filename, 0, NULL, 0) == 0
|
|
|| regexec (&file_deleted_regex, filename, 0, NULL, 0) == 0)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Return 0 if the memory mapping (which is related to FILTERFLAGS, V,
|
|
MAYBE_PRIVATE_P, and MAPPING_ANONYMOUS_P) should not be dumped, or
|
|
greater than 0 if it should.
|
|
|
|
In a nutshell, this is the logic that we follow in order to decide
|
|
if a mapping should be dumped or not.
|
|
|
|
- If the mapping is associated to a file whose name ends with
|
|
" (deleted)", or if the file is "/dev/zero", or if it is
|
|
"/SYSV%08x" (shared memory), or if there is no file associated
|
|
with it, or if the AnonHugePages: or the Anonymous: fields in the
|
|
/proc/PID/smaps have contents, then GDB considers this mapping to
|
|
be anonymous. Otherwise, GDB considers this mapping to be a
|
|
file-backed mapping (because there will be a file associated with
|
|
it).
|
|
|
|
It is worth mentioning that, from all those checks described
|
|
above, the most fragile is the one to see if the file name ends
|
|
with " (deleted)". This does not necessarily mean that the
|
|
mapping is anonymous, because the deleted file associated with
|
|
the mapping may have been a hard link to another file, for
|
|
example. The Linux kernel checks to see if "i_nlink == 0", but
|
|
GDB cannot easily (and normally) do this check (iff running as
|
|
root, it could find the mapping in /proc/PID/map_files/ and
|
|
determine whether there still are other hard links to the
|
|
inode/file). Therefore, we made a compromise here, and we assume
|
|
that if the file name ends with " (deleted)", then the mapping is
|
|
indeed anonymous. FWIW, this is something the Linux kernel could
|
|
do better: expose this information in a more direct way.
|
|
|
|
- If we see the flag "sh" in the "VmFlags:" field (in
|
|
/proc/PID/smaps), then certainly the memory mapping is shared
|
|
(VM_SHARED). If we have access to the VmFlags, and we don't see
|
|
the "sh" there, then certainly the mapping is private. However,
|
|
Linux kernels before commit
|
|
834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have the
|
|
"VmFlags:" field; in that case, we use another heuristic: if we
|
|
see 'p' in the permission flags, then we assume that the mapping
|
|
is private, even though the presence of the 's' flag there would
|
|
mean VM_MAYSHARE, which means the mapping could still be private.
|
|
This should work OK enough, however. */
|
|
|
|
static int
|
|
dump_mapping_p (unsigned int filterflags, const struct smaps_vmflags *v,
|
|
int maybe_private_p, int mapping_anon_p, int mapping_file_p,
|
|
const char *filename)
|
|
{
|
|
/* Initially, we trust in what we received from our caller. This
|
|
value may not be very precise (i.e., it was probably gathered
|
|
from the permission line in the /proc/PID/smaps list, which
|
|
actually refers to VM_MAYSHARE, and not VM_SHARED), but it is
|
|
what we have until we take a look at the "VmFlags:" field
|
|
(assuming that the version of the Linux kernel being used
|
|
supports it, of course). */
|
|
int private_p = maybe_private_p;
|
|
|
|
/* We always dump vDSO and vsyscall mappings, because it's likely that
|
|
there'll be no file to read the contents from at core load time.
|
|
The kernel does the same. */
|
|
if (strcmp ("[vdso]", filename) == 0
|
|
|| strcmp ("[vsyscall]", filename) == 0)
|
|
return 1;
|
|
|
|
if (v->initialized_p)
|
|
{
|
|
/* We never dump I/O mappings. */
|
|
if (v->io_page)
|
|
return 0;
|
|
|
|
/* Check if we should exclude this mapping. */
|
|
if (v->exclude_coredump)
|
|
return 0;
|
|
|
|
/* Update our notion of whether this mapping is shared or
|
|
private based on a trustworthy value. */
|
|
private_p = !v->shared_mapping;
|
|
|
|
/* HugeTLB checking. */
|
|
if (v->uses_huge_tlb)
|
|
{
|
|
if ((private_p && (filterflags & COREFILTER_HUGETLB_PRIVATE))
|
|
|| (!private_p && (filterflags & COREFILTER_HUGETLB_SHARED)))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (private_p)
|
|
{
|
|
if (mapping_anon_p && mapping_file_p)
|
|
{
|
|
/* This is a special situation. It can happen when we see a
|
|
mapping that is file-backed, but that contains anonymous
|
|
pages. */
|
|
return ((filterflags & COREFILTER_ANON_PRIVATE) != 0
|
|
|| (filterflags & COREFILTER_MAPPED_PRIVATE) != 0);
|
|
}
|
|
else if (mapping_anon_p)
|
|
return (filterflags & COREFILTER_ANON_PRIVATE) != 0;
|
|
else
|
|
return (filterflags & COREFILTER_MAPPED_PRIVATE) != 0;
|
|
}
|
|
else
|
|
{
|
|
if (mapping_anon_p && mapping_file_p)
|
|
{
|
|
/* This is a special situation. It can happen when we see a
|
|
mapping that is file-backed, but that contains anonymous
|
|
pages. */
|
|
return ((filterflags & COREFILTER_ANON_SHARED) != 0
|
|
|| (filterflags & COREFILTER_MAPPED_SHARED) != 0);
|
|
}
|
|
else if (mapping_anon_p)
|
|
return (filterflags & COREFILTER_ANON_SHARED) != 0;
|
|
else
|
|
return (filterflags & COREFILTER_MAPPED_SHARED) != 0;
|
|
}
|
|
}
|
|
|
|
/* Implement the "info proc" command. */
|
|
|
|
static void
|
|
linux_info_proc (struct gdbarch *gdbarch, const char *args,
|
|
enum info_proc_what what)
|
|
{
|
|
/* A long is used for pid instead of an int to avoid a loss of precision
|
|
compiler warning from the output of strtoul. */
|
|
long pid;
|
|
int cmdline_f = (what == IP_MINIMAL || what == IP_CMDLINE || what == IP_ALL);
|
|
int cwd_f = (what == IP_MINIMAL || what == IP_CWD || what == IP_ALL);
|
|
int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL);
|
|
int mappings_f = (what == IP_MAPPINGS || what == IP_ALL);
|
|
int status_f = (what == IP_STATUS || what == IP_ALL);
|
|
int stat_f = (what == IP_STAT || what == IP_ALL);
|
|
char filename[100];
|
|
char *data;
|
|
int target_errno;
|
|
|
|
if (args && isdigit (args[0]))
|
|
{
|
|
char *tem;
|
|
|
|
pid = strtoul (args, &tem, 10);
|
|
args = tem;
|
|
}
|
|
else
|
|
{
|
|
if (!target_has_execution)
|
|
error (_("No current process: you must name one."));
|
|
if (current_inferior ()->fake_pid_p)
|
|
error (_("Can't determine the current process's PID: you must name one."));
|
|
|
|
pid = current_inferior ()->pid;
|
|
}
|
|
|
|
args = skip_spaces_const (args);
|
|
if (args && args[0])
|
|
error (_("Too many parameters: %s"), args);
|
|
|
|
printf_filtered (_("process %ld\n"), pid);
|
|
if (cmdline_f)
|
|
{
|
|
xsnprintf (filename, sizeof filename, "/proc/%ld/cmdline", pid);
|
|
data = target_fileio_read_stralloc (filename);
|
|
if (data)
|
|
{
|
|
struct cleanup *cleanup = make_cleanup (xfree, data);
|
|
printf_filtered ("cmdline = '%s'\n", data);
|
|
do_cleanups (cleanup);
|
|
}
|
|
else
|
|
warning (_("unable to open /proc file '%s'"), filename);
|
|
}
|
|
if (cwd_f)
|
|
{
|
|
xsnprintf (filename, sizeof filename, "/proc/%ld/cwd", pid);
|
|
data = target_fileio_readlink (filename, &target_errno);
|
|
if (data)
|
|
{
|
|
struct cleanup *cleanup = make_cleanup (xfree, data);
|
|
printf_filtered ("cwd = '%s'\n", data);
|
|
do_cleanups (cleanup);
|
|
}
|
|
else
|
|
warning (_("unable to read link '%s'"), filename);
|
|
}
|
|
if (exe_f)
|
|
{
|
|
xsnprintf (filename, sizeof filename, "/proc/%ld/exe", pid);
|
|
data = target_fileio_readlink (filename, &target_errno);
|
|
if (data)
|
|
{
|
|
struct cleanup *cleanup = make_cleanup (xfree, data);
|
|
printf_filtered ("exe = '%s'\n", data);
|
|
do_cleanups (cleanup);
|
|
}
|
|
else
|
|
warning (_("unable to read link '%s'"), filename);
|
|
}
|
|
if (mappings_f)
|
|
{
|
|
xsnprintf (filename, sizeof filename, "/proc/%ld/maps", pid);
|
|
data = target_fileio_read_stralloc (filename);
|
|
if (data)
|
|
{
|
|
struct cleanup *cleanup = make_cleanup (xfree, data);
|
|
char *line;
|
|
|
|
printf_filtered (_("Mapped address spaces:\n\n"));
|
|
if (gdbarch_addr_bit (gdbarch) == 32)
|
|
{
|
|
printf_filtered ("\t%10s %10s %10s %10s %s\n",
|
|
"Start Addr",
|
|
" End Addr",
|
|
" Size", " Offset", "objfile");
|
|
}
|
|
else
|
|
{
|
|
printf_filtered (" %18s %18s %10s %10s %s\n",
|
|
"Start Addr",
|
|
" End Addr",
|
|
" Size", " Offset", "objfile");
|
|
}
|
|
|
|
for (line = strtok (data, "\n"); line; line = strtok (NULL, "\n"))
|
|
{
|
|
ULONGEST addr, endaddr, offset, inode;
|
|
const char *permissions, *device, *filename;
|
|
size_t permissions_len, device_len;
|
|
|
|
read_mapping (line, &addr, &endaddr,
|
|
&permissions, &permissions_len,
|
|
&offset, &device, &device_len,
|
|
&inode, &filename);
|
|
|
|
if (gdbarch_addr_bit (gdbarch) == 32)
|
|
{
|
|
printf_filtered ("\t%10s %10s %10s %10s %s\n",
|
|
paddress (gdbarch, addr),
|
|
paddress (gdbarch, endaddr),
|
|
hex_string (endaddr - addr),
|
|
hex_string (offset),
|
|
*filename? filename : "");
|
|
}
|
|
else
|
|
{
|
|
printf_filtered (" %18s %18s %10s %10s %s\n",
|
|
paddress (gdbarch, addr),
|
|
paddress (gdbarch, endaddr),
|
|
hex_string (endaddr - addr),
|
|
hex_string (offset),
|
|
*filename? filename : "");
|
|
}
|
|
}
|
|
|
|
do_cleanups (cleanup);
|
|
}
|
|
else
|
|
warning (_("unable to open /proc file '%s'"), filename);
|
|
}
|
|
if (status_f)
|
|
{
|
|
xsnprintf (filename, sizeof filename, "/proc/%ld/status", pid);
|
|
data = target_fileio_read_stralloc (filename);
|
|
if (data)
|
|
{
|
|
struct cleanup *cleanup = make_cleanup (xfree, data);
|
|
puts_filtered (data);
|
|
do_cleanups (cleanup);
|
|
}
|
|
else
|
|
warning (_("unable to open /proc file '%s'"), filename);
|
|
}
|
|
if (stat_f)
|
|
{
|
|
xsnprintf (filename, sizeof filename, "/proc/%ld/stat", pid);
|
|
data = target_fileio_read_stralloc (filename);
|
|
if (data)
|
|
{
|
|
struct cleanup *cleanup = make_cleanup (xfree, data);
|
|
const char *p = data;
|
|
|
|
printf_filtered (_("Process: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
|
|
p = skip_spaces_const (p);
|
|
if (*p == '(')
|
|
{
|
|
/* ps command also relies on no trailing fields
|
|
ever contain ')'. */
|
|
const char *ep = strrchr (p, ')');
|
|
if (ep != NULL)
|
|
{
|
|
printf_filtered ("Exec file: %.*s\n",
|
|
(int) (ep - p - 1), p + 1);
|
|
p = ep + 1;
|
|
}
|
|
}
|
|
|
|
p = skip_spaces_const (p);
|
|
if (*p)
|
|
printf_filtered (_("State: %c\n"), *p++);
|
|
|
|
if (*p)
|
|
printf_filtered (_("Parent process: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Process group: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Session id: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("TTY: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("TTY owner process group: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
|
|
if (*p)
|
|
printf_filtered (_("Flags: %s\n"),
|
|
hex_string (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Minor faults (no memory page): %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Minor faults, children: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Major faults (memory page faults): %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Major faults, children: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("utime: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("stime: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("utime, children: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("stime, children: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("jiffies remaining in current "
|
|
"time slice: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("'nice' value: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("jiffies until next timeout: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("jiffies until next SIGALRM: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("start time (jiffies since "
|
|
"system boot): %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Virtual memory size: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Resident set size: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("rlim: %s\n"),
|
|
pulongest (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Start of text: %s\n"),
|
|
hex_string (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("End of text: %s\n"),
|
|
hex_string (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Start of stack: %s\n"),
|
|
hex_string (strtoulst (p, &p, 10)));
|
|
#if 0 /* Don't know how architecture-dependent the rest is...
|
|
Anyway the signal bitmap info is available from "status". */
|
|
if (*p)
|
|
printf_filtered (_("Kernel stack pointer: %s\n"),
|
|
hex_string (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Kernel instr pointer: %s\n"),
|
|
hex_string (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Pending signals bitmap: %s\n"),
|
|
hex_string (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Blocked signals bitmap: %s\n"),
|
|
hex_string (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Ignored signals bitmap: %s\n"),
|
|
hex_string (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("Catched signals bitmap: %s\n"),
|
|
hex_string (strtoulst (p, &p, 10)));
|
|
if (*p)
|
|
printf_filtered (_("wchan (system call): %s\n"),
|
|
hex_string (strtoulst (p, &p, 10)));
|
|
#endif
|
|
do_cleanups (cleanup);
|
|
}
|
|
else
|
|
warning (_("unable to open /proc file '%s'"), filename);
|
|
}
|
|
}
|
|
|
|
/* Implement "info proc mappings" for a corefile. */
|
|
|
|
static void
|
|
linux_core_info_proc_mappings (struct gdbarch *gdbarch, const char *args)
|
|
{
|
|
asection *section;
|
|
ULONGEST count, page_size;
|
|
unsigned char *descdata, *filenames, *descend, *contents;
|
|
size_t note_size;
|
|
unsigned int addr_size_bits, addr_size;
|
|
struct cleanup *cleanup;
|
|
struct gdbarch *core_gdbarch = gdbarch_from_bfd (core_bfd);
|
|
/* We assume this for reading 64-bit core files. */
|
|
gdb_static_assert (sizeof (ULONGEST) >= 8);
|
|
|
|
section = bfd_get_section_by_name (core_bfd, ".note.linuxcore.file");
|
|
if (section == NULL)
|
|
{
|
|
warning (_("unable to find mappings in core file"));
|
|
return;
|
|
}
|
|
|
|
addr_size_bits = gdbarch_addr_bit (core_gdbarch);
|
|
addr_size = addr_size_bits / 8;
|
|
note_size = bfd_get_section_size (section);
|
|
|
|
if (note_size < 2 * addr_size)
|
|
error (_("malformed core note - too short for header"));
|
|
|
|
contents = xmalloc (note_size);
|
|
cleanup = make_cleanup (xfree, contents);
|
|
if (!bfd_get_section_contents (core_bfd, section, contents, 0, note_size))
|
|
error (_("could not get core note contents"));
|
|
|
|
descdata = contents;
|
|
descend = descdata + note_size;
|
|
|
|
if (descdata[note_size - 1] != '\0')
|
|
error (_("malformed note - does not end with \\0"));
|
|
|
|
count = bfd_get (addr_size_bits, core_bfd, descdata);
|
|
descdata += addr_size;
|
|
|
|
page_size = bfd_get (addr_size_bits, core_bfd, descdata);
|
|
descdata += addr_size;
|
|
|
|
if (note_size < 2 * addr_size + count * 3 * addr_size)
|
|
error (_("malformed note - too short for supplied file count"));
|
|
|
|
printf_filtered (_("Mapped address spaces:\n\n"));
|
|
if (gdbarch_addr_bit (gdbarch) == 32)
|
|
{
|
|
printf_filtered ("\t%10s %10s %10s %10s %s\n",
|
|
"Start Addr",
|
|
" End Addr",
|
|
" Size", " Offset", "objfile");
|
|
}
|
|
else
|
|
{
|
|
printf_filtered (" %18s %18s %10s %10s %s\n",
|
|
"Start Addr",
|
|
" End Addr",
|
|
" Size", " Offset", "objfile");
|
|
}
|
|
|
|
filenames = descdata + count * 3 * addr_size;
|
|
while (--count > 0)
|
|
{
|
|
ULONGEST start, end, file_ofs;
|
|
|
|
if (filenames == descend)
|
|
error (_("malformed note - filenames end too early"));
|
|
|
|
start = bfd_get (addr_size_bits, core_bfd, descdata);
|
|
descdata += addr_size;
|
|
end = bfd_get (addr_size_bits, core_bfd, descdata);
|
|
descdata += addr_size;
|
|
file_ofs = bfd_get (addr_size_bits, core_bfd, descdata);
|
|
descdata += addr_size;
|
|
|
|
file_ofs *= page_size;
|
|
|
|
if (gdbarch_addr_bit (gdbarch) == 32)
|
|
printf_filtered ("\t%10s %10s %10s %10s %s\n",
|
|
paddress (gdbarch, start),
|
|
paddress (gdbarch, end),
|
|
hex_string (end - start),
|
|
hex_string (file_ofs),
|
|
filenames);
|
|
else
|
|
printf_filtered (" %18s %18s %10s %10s %s\n",
|
|
paddress (gdbarch, start),
|
|
paddress (gdbarch, end),
|
|
hex_string (end - start),
|
|
hex_string (file_ofs),
|
|
filenames);
|
|
|
|
filenames += 1 + strlen ((char *) filenames);
|
|
}
|
|
|
|
do_cleanups (cleanup);
|
|
}
|
|
|
|
/* Implement "info proc" for a corefile. */
|
|
|
|
static void
|
|
linux_core_info_proc (struct gdbarch *gdbarch, const char *args,
|
|
enum info_proc_what what)
|
|
{
|
|
int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL);
|
|
int mappings_f = (what == IP_MAPPINGS || what == IP_ALL);
|
|
|
|
if (exe_f)
|
|
{
|
|
const char *exe;
|
|
|
|
exe = bfd_core_file_failing_command (core_bfd);
|
|
if (exe != NULL)
|
|
printf_filtered ("exe = '%s'\n", exe);
|
|
else
|
|
warning (_("unable to find command name in core file"));
|
|
}
|
|
|
|
if (mappings_f)
|
|
linux_core_info_proc_mappings (gdbarch, args);
|
|
|
|
if (!exe_f && !mappings_f)
|
|
error (_("unable to handle request"));
|
|
}
|
|
|
|
typedef int linux_find_memory_region_ftype (ULONGEST vaddr, ULONGEST size,
|
|
ULONGEST offset, ULONGEST inode,
|
|
int read, int write,
|
|
int exec, int modified,
|
|
const char *filename,
|
|
void *data);
|
|
|
|
/* List memory regions in the inferior for a corefile. */
|
|
|
|
static int
|
|
linux_find_memory_regions_full (struct gdbarch *gdbarch,
|
|
linux_find_memory_region_ftype *func,
|
|
void *obfd)
|
|
{
|
|
char mapsfilename[100];
|
|
char coredumpfilter_name[100];
|
|
char *data, *coredumpfilterdata;
|
|
pid_t pid;
|
|
/* Default dump behavior of coredump_filter (0x33), according to
|
|
Documentation/filesystems/proc.txt from the Linux kernel
|
|
tree. */
|
|
unsigned int filterflags = (COREFILTER_ANON_PRIVATE
|
|
| COREFILTER_ANON_SHARED
|
|
| COREFILTER_ELF_HEADERS
|
|
| COREFILTER_HUGETLB_PRIVATE);
|
|
|
|
/* We need to know the real target PID to access /proc. */
|
|
if (current_inferior ()->fake_pid_p)
|
|
return 1;
|
|
|
|
pid = current_inferior ()->pid;
|
|
|
|
if (use_coredump_filter)
|
|
{
|
|
xsnprintf (coredumpfilter_name, sizeof (coredumpfilter_name),
|
|
"/proc/%d/coredump_filter", pid);
|
|
coredumpfilterdata = target_fileio_read_stralloc (coredumpfilter_name);
|
|
if (coredumpfilterdata != NULL)
|
|
{
|
|
sscanf (coredumpfilterdata, "%x", &filterflags);
|
|
xfree (coredumpfilterdata);
|
|
}
|
|
}
|
|
|
|
xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/smaps", pid);
|
|
data = target_fileio_read_stralloc (mapsfilename);
|
|
if (data == NULL)
|
|
{
|
|
/* Older Linux kernels did not support /proc/PID/smaps. */
|
|
xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/maps", pid);
|
|
data = target_fileio_read_stralloc (mapsfilename);
|
|
}
|
|
|
|
if (data != NULL)
|
|
{
|
|
struct cleanup *cleanup = make_cleanup (xfree, data);
|
|
char *line, *t;
|
|
|
|
line = strtok_r (data, "\n", &t);
|
|
while (line != NULL)
|
|
{
|
|
ULONGEST addr, endaddr, offset, inode;
|
|
const char *permissions, *device, *filename;
|
|
struct smaps_vmflags v;
|
|
size_t permissions_len, device_len;
|
|
int read, write, exec, private;
|
|
int has_anonymous = 0;
|
|
int should_dump_p = 0;
|
|
int mapping_anon_p;
|
|
int mapping_file_p;
|
|
|
|
memset (&v, 0, sizeof (v));
|
|
read_mapping (line, &addr, &endaddr, &permissions, &permissions_len,
|
|
&offset, &device, &device_len, &inode, &filename);
|
|
mapping_anon_p = mapping_is_anonymous_p (filename);
|
|
/* If the mapping is not anonymous, then we can consider it
|
|
to be file-backed. These two states (anonymous or
|
|
file-backed) seem to be exclusive, but they can actually
|
|
coexist. For example, if a file-backed mapping has
|
|
"Anonymous:" pages (see more below), then the Linux
|
|
kernel will dump this mapping when the user specified
|
|
that she only wants anonymous mappings in the corefile
|
|
(*even* when she explicitly disabled the dumping of
|
|
file-backed mappings). */
|
|
mapping_file_p = !mapping_anon_p;
|
|
|
|
/* Decode permissions. */
|
|
read = (memchr (permissions, 'r', permissions_len) != 0);
|
|
write = (memchr (permissions, 'w', permissions_len) != 0);
|
|
exec = (memchr (permissions, 'x', permissions_len) != 0);
|
|
/* 'private' here actually means VM_MAYSHARE, and not
|
|
VM_SHARED. In order to know if a mapping is really
|
|
private or not, we must check the flag "sh" in the
|
|
VmFlags field. This is done by decode_vmflags. However,
|
|
if we are using a Linux kernel released before the commit
|
|
834f82e2aa9a8ede94b17b656329f850c1471514 (3.10), we will
|
|
not have the VmFlags there. In this case, there is
|
|
really no way to know if we are dealing with VM_SHARED,
|
|
so we just assume that VM_MAYSHARE is enough. */
|
|
private = memchr (permissions, 'p', permissions_len) != 0;
|
|
|
|
/* Try to detect if region should be dumped by parsing smaps
|
|
counters. */
|
|
for (line = strtok_r (NULL, "\n", &t);
|
|
line != NULL && line[0] >= 'A' && line[0] <= 'Z';
|
|
line = strtok_r (NULL, "\n", &t))
|
|
{
|
|
char keyword[64 + 1];
|
|
|
|
if (sscanf (line, "%64s", keyword) != 1)
|
|
{
|
|
warning (_("Error parsing {s,}maps file '%s'"), mapsfilename);
|
|
break;
|
|
}
|
|
|
|
if (strcmp (keyword, "Anonymous:") == 0)
|
|
{
|
|
/* Older Linux kernels did not support the
|
|
"Anonymous:" counter. Check it here. */
|
|
has_anonymous = 1;
|
|
}
|
|
else if (strcmp (keyword, "VmFlags:") == 0)
|
|
decode_vmflags (line, &v);
|
|
|
|
if (strcmp (keyword, "AnonHugePages:") == 0
|
|
|| strcmp (keyword, "Anonymous:") == 0)
|
|
{
|
|
unsigned long number;
|
|
|
|
if (sscanf (line, "%*s%lu", &number) != 1)
|
|
{
|
|
warning (_("Error parsing {s,}maps file '%s' number"),
|
|
mapsfilename);
|
|
break;
|
|
}
|
|
if (number > 0)
|
|
{
|
|
/* Even if we are dealing with a file-backed
|
|
mapping, if it contains anonymous pages we
|
|
consider it to be *also* an anonymous
|
|
mapping, because this is what the Linux
|
|
kernel does:
|
|
|
|
// Dump segments that have been written to.
|
|
if (vma->anon_vma && FILTER(ANON_PRIVATE))
|
|
goto whole;
|
|
|
|
Note that if the mapping is already marked as
|
|
file-backed (i.e., mapping_file_p is
|
|
non-zero), then this is a special case, and
|
|
this mapping will be dumped either when the
|
|
user wants to dump file-backed *or* anonymous
|
|
mappings. */
|
|
mapping_anon_p = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (has_anonymous)
|
|
should_dump_p = dump_mapping_p (filterflags, &v, private,
|
|
mapping_anon_p, mapping_file_p,
|
|
filename);
|
|
else
|
|
{
|
|
/* Older Linux kernels did not support the "Anonymous:" counter.
|
|
If it is missing, we can't be sure - dump all the pages. */
|
|
should_dump_p = 1;
|
|
}
|
|
|
|
/* Invoke the callback function to create the corefile segment. */
|
|
if (should_dump_p)
|
|
func (addr, endaddr - addr, offset, inode,
|
|
read, write, exec, 1, /* MODIFIED is true because we
|
|
want to dump the mapping. */
|
|
filename, obfd);
|
|
}
|
|
|
|
do_cleanups (cleanup);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* A structure for passing information through
|
|
linux_find_memory_regions_full. */
|
|
|
|
struct linux_find_memory_regions_data
|
|
{
|
|
/* The original callback. */
|
|
|
|
find_memory_region_ftype func;
|
|
|
|
/* The original datum. */
|
|
|
|
void *obfd;
|
|
};
|
|
|
|
/* A callback for linux_find_memory_regions that converts between the
|
|
"full"-style callback and find_memory_region_ftype. */
|
|
|
|
static int
|
|
linux_find_memory_regions_thunk (ULONGEST vaddr, ULONGEST size,
|
|
ULONGEST offset, ULONGEST inode,
|
|
int read, int write, int exec, int modified,
|
|
const char *filename, void *arg)
|
|
{
|
|
struct linux_find_memory_regions_data *data = arg;
|
|
|
|
return data->func (vaddr, size, read, write, exec, modified, data->obfd);
|
|
}
|
|
|
|
/* A variant of linux_find_memory_regions_full that is suitable as the
|
|
gdbarch find_memory_regions method. */
|
|
|
|
static int
|
|
linux_find_memory_regions (struct gdbarch *gdbarch,
|
|
find_memory_region_ftype func, void *obfd)
|
|
{
|
|
struct linux_find_memory_regions_data data;
|
|
|
|
data.func = func;
|
|
data.obfd = obfd;
|
|
|
|
return linux_find_memory_regions_full (gdbarch,
|
|
linux_find_memory_regions_thunk,
|
|
&data);
|
|
}
|
|
|
|
/* Determine which signal stopped execution. */
|
|
|
|
static int
|
|
find_signalled_thread (struct thread_info *info, void *data)
|
|
{
|
|
if (info->suspend.stop_signal != GDB_SIGNAL_0
|
|
&& ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum gdb_signal
|
|
find_stop_signal (void)
|
|
{
|
|
struct thread_info *info =
|
|
iterate_over_threads (find_signalled_thread, NULL);
|
|
|
|
if (info)
|
|
return info->suspend.stop_signal;
|
|
else
|
|
return GDB_SIGNAL_0;
|
|
}
|
|
|
|
/* Generate corefile notes for SPU contexts. */
|
|
|
|
static char *
|
|
linux_spu_make_corefile_notes (bfd *obfd, char *note_data, int *note_size)
|
|
{
|
|
static const char *spu_files[] =
|
|
{
|
|
"object-id",
|
|
"mem",
|
|
"regs",
|
|
"fpcr",
|
|
"lslr",
|
|
"decr",
|
|
"decr_status",
|
|
"signal1",
|
|
"signal1_type",
|
|
"signal2",
|
|
"signal2_type",
|
|
"event_mask",
|
|
"event_status",
|
|
"mbox_info",
|
|
"ibox_info",
|
|
"wbox_info",
|
|
"dma_info",
|
|
"proxydma_info",
|
|
};
|
|
|
|
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
|
|
gdb_byte *spu_ids;
|
|
LONGEST i, j, size;
|
|
|
|
/* Determine list of SPU ids. */
|
|
size = target_read_alloc (¤t_target, TARGET_OBJECT_SPU,
|
|
NULL, &spu_ids);
|
|
|
|
/* Generate corefile notes for each SPU file. */
|
|
for (i = 0; i < size; i += 4)
|
|
{
|
|
int fd = extract_unsigned_integer (spu_ids + i, 4, byte_order);
|
|
|
|
for (j = 0; j < sizeof (spu_files) / sizeof (spu_files[0]); j++)
|
|
{
|
|
char annex[32], note_name[32];
|
|
gdb_byte *spu_data;
|
|
LONGEST spu_len;
|
|
|
|
xsnprintf (annex, sizeof annex, "%d/%s", fd, spu_files[j]);
|
|
spu_len = target_read_alloc (¤t_target, TARGET_OBJECT_SPU,
|
|
annex, &spu_data);
|
|
if (spu_len > 0)
|
|
{
|
|
xsnprintf (note_name, sizeof note_name, "SPU/%s", annex);
|
|
note_data = elfcore_write_note (obfd, note_data, note_size,
|
|
note_name, NT_SPU,
|
|
spu_data, spu_len);
|
|
xfree (spu_data);
|
|
|
|
if (!note_data)
|
|
{
|
|
xfree (spu_ids);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (size > 0)
|
|
xfree (spu_ids);
|
|
|
|
return note_data;
|
|
}
|
|
|
|
/* This is used to pass information from
|
|
linux_make_mappings_corefile_notes through
|
|
linux_find_memory_regions_full. */
|
|
|
|
struct linux_make_mappings_data
|
|
{
|
|
/* Number of files mapped. */
|
|
ULONGEST file_count;
|
|
|
|
/* The obstack for the main part of the data. */
|
|
struct obstack *data_obstack;
|
|
|
|
/* The filename obstack. */
|
|
struct obstack *filename_obstack;
|
|
|
|
/* The architecture's "long" type. */
|
|
struct type *long_type;
|
|
};
|
|
|
|
static linux_find_memory_region_ftype linux_make_mappings_callback;
|
|
|
|
/* A callback for linux_find_memory_regions_full that updates the
|
|
mappings data for linux_make_mappings_corefile_notes. */
|
|
|
|
static int
|
|
linux_make_mappings_callback (ULONGEST vaddr, ULONGEST size,
|
|
ULONGEST offset, ULONGEST inode,
|
|
int read, int write, int exec, int modified,
|
|
const char *filename, void *data)
|
|
{
|
|
struct linux_make_mappings_data *map_data = data;
|
|
gdb_byte buf[sizeof (ULONGEST)];
|
|
|
|
if (*filename == '\0' || inode == 0)
|
|
return 0;
|
|
|
|
++map_data->file_count;
|
|
|
|
pack_long (buf, map_data->long_type, vaddr);
|
|
obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type));
|
|
pack_long (buf, map_data->long_type, vaddr + size);
|
|
obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type));
|
|
pack_long (buf, map_data->long_type, offset);
|
|
obstack_grow (map_data->data_obstack, buf, TYPE_LENGTH (map_data->long_type));
|
|
|
|
obstack_grow_str0 (map_data->filename_obstack, filename);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Write the file mapping data to the core file, if possible. OBFD is
|
|
the output BFD. NOTE_DATA is the current note data, and NOTE_SIZE
|
|
is a pointer to the note size. Returns the new NOTE_DATA and
|
|
updates NOTE_SIZE. */
|
|
|
|
static char *
|
|
linux_make_mappings_corefile_notes (struct gdbarch *gdbarch, bfd *obfd,
|
|
char *note_data, int *note_size)
|
|
{
|
|
struct cleanup *cleanup;
|
|
struct obstack data_obstack, filename_obstack;
|
|
struct linux_make_mappings_data mapping_data;
|
|
struct type *long_type
|
|
= arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), 0, "long");
|
|
gdb_byte buf[sizeof (ULONGEST)];
|
|
|
|
obstack_init (&data_obstack);
|
|
cleanup = make_cleanup_obstack_free (&data_obstack);
|
|
obstack_init (&filename_obstack);
|
|
make_cleanup_obstack_free (&filename_obstack);
|
|
|
|
mapping_data.file_count = 0;
|
|
mapping_data.data_obstack = &data_obstack;
|
|
mapping_data.filename_obstack = &filename_obstack;
|
|
mapping_data.long_type = long_type;
|
|
|
|
/* Reserve space for the count. */
|
|
obstack_blank (&data_obstack, TYPE_LENGTH (long_type));
|
|
/* We always write the page size as 1 since we have no good way to
|
|
determine the correct value. */
|
|
pack_long (buf, long_type, 1);
|
|
obstack_grow (&data_obstack, buf, TYPE_LENGTH (long_type));
|
|
|
|
linux_find_memory_regions_full (gdbarch, linux_make_mappings_callback,
|
|
&mapping_data);
|
|
|
|
if (mapping_data.file_count != 0)
|
|
{
|
|
/* Write the count to the obstack. */
|
|
pack_long ((gdb_byte *) obstack_base (&data_obstack),
|
|
long_type, mapping_data.file_count);
|
|
|
|
/* Copy the filenames to the data obstack. */
|
|
obstack_grow (&data_obstack, obstack_base (&filename_obstack),
|
|
obstack_object_size (&filename_obstack));
|
|
|
|
note_data = elfcore_write_note (obfd, note_data, note_size,
|
|
"CORE", NT_FILE,
|
|
obstack_base (&data_obstack),
|
|
obstack_object_size (&data_obstack));
|
|
}
|
|
|
|
do_cleanups (cleanup);
|
|
return note_data;
|
|
}
|
|
|
|
/* Structure for passing information from
|
|
linux_collect_thread_registers via an iterator to
|
|
linux_collect_regset_section_cb. */
|
|
|
|
struct linux_collect_regset_section_cb_data
|
|
{
|
|
struct gdbarch *gdbarch;
|
|
const struct regcache *regcache;
|
|
bfd *obfd;
|
|
char *note_data;
|
|
int *note_size;
|
|
unsigned long lwp;
|
|
enum gdb_signal stop_signal;
|
|
int abort_iteration;
|
|
};
|
|
|
|
/* Callback for iterate_over_regset_sections that records a single
|
|
regset in the corefile note section. */
|
|
|
|
static void
|
|
linux_collect_regset_section_cb (const char *sect_name, int size,
|
|
const struct regset *regset,
|
|
const char *human_name, void *cb_data)
|
|
{
|
|
char *buf;
|
|
struct linux_collect_regset_section_cb_data *data = cb_data;
|
|
|
|
if (data->abort_iteration)
|
|
return;
|
|
|
|
gdb_assert (regset && regset->collect_regset);
|
|
|
|
buf = xmalloc (size);
|
|
regset->collect_regset (regset, data->regcache, -1, buf, size);
|
|
|
|
/* PRSTATUS still needs to be treated specially. */
|
|
if (strcmp (sect_name, ".reg") == 0)
|
|
data->note_data = (char *) elfcore_write_prstatus
|
|
(data->obfd, data->note_data, data->note_size, data->lwp,
|
|
gdb_signal_to_host (data->stop_signal), buf);
|
|
else
|
|
data->note_data = (char *) elfcore_write_register_note
|
|
(data->obfd, data->note_data, data->note_size,
|
|
sect_name, buf, size);
|
|
xfree (buf);
|
|
|
|
if (data->note_data == NULL)
|
|
data->abort_iteration = 1;
|
|
}
|
|
|
|
/* Records the thread's register state for the corefile note
|
|
section. */
|
|
|
|
static char *
|
|
linux_collect_thread_registers (const struct regcache *regcache,
|
|
ptid_t ptid, bfd *obfd,
|
|
char *note_data, int *note_size,
|
|
enum gdb_signal stop_signal)
|
|
{
|
|
struct gdbarch *gdbarch = get_regcache_arch (regcache);
|
|
struct linux_collect_regset_section_cb_data data;
|
|
|
|
data.gdbarch = gdbarch;
|
|
data.regcache = regcache;
|
|
data.obfd = obfd;
|
|
data.note_data = note_data;
|
|
data.note_size = note_size;
|
|
data.stop_signal = stop_signal;
|
|
data.abort_iteration = 0;
|
|
|
|
/* For remote targets the LWP may not be available, so use the TID. */
|
|
data.lwp = ptid_get_lwp (ptid);
|
|
if (!data.lwp)
|
|
data.lwp = ptid_get_tid (ptid);
|
|
|
|
gdbarch_iterate_over_regset_sections (gdbarch,
|
|
linux_collect_regset_section_cb,
|
|
&data, regcache);
|
|
return data.note_data;
|
|
}
|
|
|
|
/* Fetch the siginfo data for the current thread, if it exists. If
|
|
there is no data, or we could not read it, return NULL. Otherwise,
|
|
return a newly malloc'd buffer holding the data and fill in *SIZE
|
|
with the size of the data. The caller is responsible for freeing
|
|
the data. */
|
|
|
|
static gdb_byte *
|
|
linux_get_siginfo_data (struct gdbarch *gdbarch, LONGEST *size)
|
|
{
|
|
struct type *siginfo_type;
|
|
gdb_byte *buf;
|
|
LONGEST bytes_read;
|
|
struct cleanup *cleanups;
|
|
|
|
if (!gdbarch_get_siginfo_type_p (gdbarch))
|
|
return NULL;
|
|
|
|
siginfo_type = gdbarch_get_siginfo_type (gdbarch);
|
|
|
|
buf = xmalloc (TYPE_LENGTH (siginfo_type));
|
|
cleanups = make_cleanup (xfree, buf);
|
|
|
|
bytes_read = target_read (¤t_target, TARGET_OBJECT_SIGNAL_INFO, NULL,
|
|
buf, 0, TYPE_LENGTH (siginfo_type));
|
|
if (bytes_read == TYPE_LENGTH (siginfo_type))
|
|
{
|
|
discard_cleanups (cleanups);
|
|
*size = bytes_read;
|
|
}
|
|
else
|
|
{
|
|
do_cleanups (cleanups);
|
|
buf = NULL;
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
struct linux_corefile_thread_data
|
|
{
|
|
struct gdbarch *gdbarch;
|
|
int pid;
|
|
bfd *obfd;
|
|
char *note_data;
|
|
int *note_size;
|
|
enum gdb_signal stop_signal;
|
|
};
|
|
|
|
/* Called by gdbthread.c once per thread. Records the thread's
|
|
register state for the corefile note section. */
|
|
|
|
static int
|
|
linux_corefile_thread_callback (struct thread_info *info, void *data)
|
|
{
|
|
struct linux_corefile_thread_data *args = data;
|
|
|
|
/* It can be current thread
|
|
which cannot be removed by update_thread_list. */
|
|
if (info->state == THREAD_EXITED)
|
|
return 0;
|
|
|
|
if (ptid_get_pid (info->ptid) == args->pid)
|
|
{
|
|
struct cleanup *old_chain;
|
|
struct regcache *regcache;
|
|
gdb_byte *siginfo_data;
|
|
LONGEST siginfo_size = 0;
|
|
|
|
regcache = get_thread_arch_regcache (info->ptid, args->gdbarch);
|
|
|
|
old_chain = save_inferior_ptid ();
|
|
inferior_ptid = info->ptid;
|
|
target_fetch_registers (regcache, -1);
|
|
siginfo_data = linux_get_siginfo_data (args->gdbarch, &siginfo_size);
|
|
do_cleanups (old_chain);
|
|
|
|
old_chain = make_cleanup (xfree, siginfo_data);
|
|
|
|
args->note_data = linux_collect_thread_registers
|
|
(regcache, info->ptid, args->obfd, args->note_data,
|
|
args->note_size, args->stop_signal);
|
|
|
|
/* Don't return anything if we got no register information above,
|
|
such a core file is useless. */
|
|
if (args->note_data != NULL)
|
|
if (siginfo_data != NULL)
|
|
args->note_data = elfcore_write_note (args->obfd,
|
|
args->note_data,
|
|
args->note_size,
|
|
"CORE", NT_SIGINFO,
|
|
siginfo_data, siginfo_size);
|
|
|
|
do_cleanups (old_chain);
|
|
}
|
|
|
|
return !args->note_data;
|
|
}
|
|
|
|
/* Fill the PRPSINFO structure with information about the process being
|
|
debugged. Returns 1 in case of success, 0 for failures. Please note that
|
|
even if the structure cannot be entirely filled (e.g., GDB was unable to
|
|
gather information about the process UID/GID), this function will still
|
|
return 1 since some information was already recorded. It will only return
|
|
0 iff nothing can be gathered. */
|
|
|
|
static int
|
|
linux_fill_prpsinfo (struct elf_internal_linux_prpsinfo *p)
|
|
{
|
|
/* The filename which we will use to obtain some info about the process.
|
|
We will basically use this to store the `/proc/PID/FILENAME' file. */
|
|
char filename[100];
|
|
/* The full name of the program which generated the corefile. */
|
|
char *fname;
|
|
/* The basename of the executable. */
|
|
const char *basename;
|
|
/* The arguments of the program. */
|
|
char *psargs;
|
|
char *infargs;
|
|
/* The contents of `/proc/PID/stat' and `/proc/PID/status' files. */
|
|
char *proc_stat, *proc_status;
|
|
/* Temporary buffer. */
|
|
char *tmpstr;
|
|
/* The valid states of a process, according to the Linux kernel. */
|
|
const char valid_states[] = "RSDTZW";
|
|
/* The program state. */
|
|
const char *prog_state;
|
|
/* The state of the process. */
|
|
char pr_sname;
|
|
/* The PID of the program which generated the corefile. */
|
|
pid_t pid;
|
|
/* Process flags. */
|
|
unsigned int pr_flag;
|
|
/* Process nice value. */
|
|
long pr_nice;
|
|
/* The number of fields read by `sscanf'. */
|
|
int n_fields = 0;
|
|
/* Cleanups. */
|
|
struct cleanup *c;
|
|
int i;
|
|
|
|
gdb_assert (p != NULL);
|
|
|
|
/* Obtaining PID and filename. */
|
|
pid = ptid_get_pid (inferior_ptid);
|
|
xsnprintf (filename, sizeof (filename), "/proc/%d/cmdline", (int) pid);
|
|
fname = target_fileio_read_stralloc (filename);
|
|
|
|
if (fname == NULL || *fname == '\0')
|
|
{
|
|
/* No program name was read, so we won't be able to retrieve more
|
|
information about the process. */
|
|
xfree (fname);
|
|
return 0;
|
|
}
|
|
|
|
c = make_cleanup (xfree, fname);
|
|
memset (p, 0, sizeof (*p));
|
|
|
|
/* Defining the PID. */
|
|
p->pr_pid = pid;
|
|
|
|
/* Copying the program name. Only the basename matters. */
|
|
basename = lbasename (fname);
|
|
strncpy (p->pr_fname, basename, sizeof (p->pr_fname));
|
|
p->pr_fname[sizeof (p->pr_fname) - 1] = '\0';
|
|
|
|
infargs = get_inferior_args ();
|
|
|
|
psargs = xstrdup (fname);
|
|
if (infargs != NULL)
|
|
psargs = reconcat (psargs, psargs, " ", infargs, NULL);
|
|
|
|
make_cleanup (xfree, psargs);
|
|
|
|
strncpy (p->pr_psargs, psargs, sizeof (p->pr_psargs));
|
|
p->pr_psargs[sizeof (p->pr_psargs) - 1] = '\0';
|
|
|
|
xsnprintf (filename, sizeof (filename), "/proc/%d/stat", (int) pid);
|
|
proc_stat = target_fileio_read_stralloc (filename);
|
|
make_cleanup (xfree, proc_stat);
|
|
|
|
if (proc_stat == NULL || *proc_stat == '\0')
|
|
{
|
|
/* Despite being unable to read more information about the
|
|
process, we return 1 here because at least we have its
|
|
command line, PID and arguments. */
|
|
do_cleanups (c);
|
|
return 1;
|
|
}
|
|
|
|
/* Ok, we have the stats. It's time to do a little parsing of the
|
|
contents of the buffer, so that we end up reading what we want.
|
|
|
|
The following parsing mechanism is strongly based on the
|
|
information generated by the `fs/proc/array.c' file, present in
|
|
the Linux kernel tree. More details about how the information is
|
|
displayed can be obtained by seeing the manpage of proc(5),
|
|
specifically under the entry of `/proc/[pid]/stat'. */
|
|
|
|
/* Getting rid of the PID, since we already have it. */
|
|
while (isdigit (*proc_stat))
|
|
++proc_stat;
|
|
|
|
proc_stat = skip_spaces (proc_stat);
|
|
|
|
/* ps command also relies on no trailing fields ever contain ')'. */
|
|
proc_stat = strrchr (proc_stat, ')');
|
|
if (proc_stat == NULL)
|
|
{
|
|
do_cleanups (c);
|
|
return 1;
|
|
}
|
|
proc_stat++;
|
|
|
|
proc_stat = skip_spaces (proc_stat);
|
|
|
|
n_fields = sscanf (proc_stat,
|
|
"%c" /* Process state. */
|
|
"%d%d%d" /* Parent PID, group ID, session ID. */
|
|
"%*d%*d" /* tty_nr, tpgid (not used). */
|
|
"%u" /* Flags. */
|
|
"%*s%*s%*s%*s" /* minflt, cminflt, majflt,
|
|
cmajflt (not used). */
|
|
"%*s%*s%*s%*s" /* utime, stime, cutime,
|
|
cstime (not used). */
|
|
"%*s" /* Priority (not used). */
|
|
"%ld", /* Nice. */
|
|
&pr_sname,
|
|
&p->pr_ppid, &p->pr_pgrp, &p->pr_sid,
|
|
&pr_flag,
|
|
&pr_nice);
|
|
|
|
if (n_fields != 6)
|
|
{
|
|
/* Again, we couldn't read the complementary information about
|
|
the process state. However, we already have minimal
|
|
information, so we just return 1 here. */
|
|
do_cleanups (c);
|
|
return 1;
|
|
}
|
|
|
|
/* Filling the structure fields. */
|
|
prog_state = strchr (valid_states, pr_sname);
|
|
if (prog_state != NULL)
|
|
p->pr_state = prog_state - valid_states;
|
|
else
|
|
{
|
|
/* Zero means "Running". */
|
|
p->pr_state = 0;
|
|
}
|
|
|
|
p->pr_sname = p->pr_state > 5 ? '.' : pr_sname;
|
|
p->pr_zomb = p->pr_sname == 'Z';
|
|
p->pr_nice = pr_nice;
|
|
p->pr_flag = pr_flag;
|
|
|
|
/* Finally, obtaining the UID and GID. For that, we read and parse the
|
|
contents of the `/proc/PID/status' file. */
|
|
xsnprintf (filename, sizeof (filename), "/proc/%d/status", (int) pid);
|
|
proc_status = target_fileio_read_stralloc (filename);
|
|
make_cleanup (xfree, proc_status);
|
|
|
|
if (proc_status == NULL || *proc_status == '\0')
|
|
{
|
|
/* Returning 1 since we already have a bunch of information. */
|
|
do_cleanups (c);
|
|
return 1;
|
|
}
|
|
|
|
/* Extracting the UID. */
|
|
tmpstr = strstr (proc_status, "Uid:");
|
|
if (tmpstr != NULL)
|
|
{
|
|
/* Advancing the pointer to the beginning of the UID. */
|
|
tmpstr += sizeof ("Uid:");
|
|
while (*tmpstr != '\0' && !isdigit (*tmpstr))
|
|
++tmpstr;
|
|
|
|
if (isdigit (*tmpstr))
|
|
p->pr_uid = strtol (tmpstr, &tmpstr, 10);
|
|
}
|
|
|
|
/* Extracting the GID. */
|
|
tmpstr = strstr (proc_status, "Gid:");
|
|
if (tmpstr != NULL)
|
|
{
|
|
/* Advancing the pointer to the beginning of the GID. */
|
|
tmpstr += sizeof ("Gid:");
|
|
while (*tmpstr != '\0' && !isdigit (*tmpstr))
|
|
++tmpstr;
|
|
|
|
if (isdigit (*tmpstr))
|
|
p->pr_gid = strtol (tmpstr, &tmpstr, 10);
|
|
}
|
|
|
|
do_cleanups (c);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Build the note section for a corefile, and return it in a malloc
|
|
buffer. */
|
|
|
|
static char *
|
|
linux_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size)
|
|
{
|
|
struct linux_corefile_thread_data thread_args;
|
|
struct elf_internal_linux_prpsinfo prpsinfo;
|
|
char *note_data = NULL;
|
|
gdb_byte *auxv;
|
|
int auxv_len;
|
|
|
|
if (! gdbarch_iterate_over_regset_sections_p (gdbarch))
|
|
return NULL;
|
|
|
|
if (linux_fill_prpsinfo (&prpsinfo))
|
|
{
|
|
if (gdbarch_elfcore_write_linux_prpsinfo_p (gdbarch))
|
|
{
|
|
note_data = gdbarch_elfcore_write_linux_prpsinfo (gdbarch, obfd,
|
|
note_data, note_size,
|
|
&prpsinfo);
|
|
}
|
|
else
|
|
{
|
|
if (gdbarch_ptr_bit (gdbarch) == 64)
|
|
note_data = elfcore_write_linux_prpsinfo64 (obfd,
|
|
note_data, note_size,
|
|
&prpsinfo);
|
|
else
|
|
note_data = elfcore_write_linux_prpsinfo32 (obfd,
|
|
note_data, note_size,
|
|
&prpsinfo);
|
|
}
|
|
}
|
|
|
|
/* Thread register information. */
|
|
TRY
|
|
{
|
|
update_thread_list ();
|
|
}
|
|
CATCH (e, RETURN_MASK_ERROR)
|
|
{
|
|
exception_print (gdb_stderr, e);
|
|
}
|
|
END_CATCH
|
|
|
|
thread_args.gdbarch = gdbarch;
|
|
thread_args.pid = ptid_get_pid (inferior_ptid);
|
|
thread_args.obfd = obfd;
|
|
thread_args.note_data = note_data;
|
|
thread_args.note_size = note_size;
|
|
thread_args.stop_signal = find_stop_signal ();
|
|
iterate_over_threads (linux_corefile_thread_callback, &thread_args);
|
|
note_data = thread_args.note_data;
|
|
if (!note_data)
|
|
return NULL;
|
|
|
|
/* Auxillary vector. */
|
|
auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV,
|
|
NULL, &auxv);
|
|
if (auxv_len > 0)
|
|
{
|
|
note_data = elfcore_write_note (obfd, note_data, note_size,
|
|
"CORE", NT_AUXV, auxv, auxv_len);
|
|
xfree (auxv);
|
|
|
|
if (!note_data)
|
|
return NULL;
|
|
}
|
|
|
|
/* SPU information. */
|
|
note_data = linux_spu_make_corefile_notes (obfd, note_data, note_size);
|
|
if (!note_data)
|
|
return NULL;
|
|
|
|
/* File mappings. */
|
|
note_data = linux_make_mappings_corefile_notes (gdbarch, obfd,
|
|
note_data, note_size);
|
|
|
|
return note_data;
|
|
}
|
|
|
|
/* Implementation of `gdbarch_gdb_signal_from_target', as defined in
|
|
gdbarch.h. This function is not static because it is exported to
|
|
other -tdep files. */
|
|
|
|
enum gdb_signal
|
|
linux_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
|
|
{
|
|
switch (signal)
|
|
{
|
|
case 0:
|
|
return GDB_SIGNAL_0;
|
|
|
|
case LINUX_SIGHUP:
|
|
return GDB_SIGNAL_HUP;
|
|
|
|
case LINUX_SIGINT:
|
|
return GDB_SIGNAL_INT;
|
|
|
|
case LINUX_SIGQUIT:
|
|
return GDB_SIGNAL_QUIT;
|
|
|
|
case LINUX_SIGILL:
|
|
return GDB_SIGNAL_ILL;
|
|
|
|
case LINUX_SIGTRAP:
|
|
return GDB_SIGNAL_TRAP;
|
|
|
|
case LINUX_SIGABRT:
|
|
return GDB_SIGNAL_ABRT;
|
|
|
|
case LINUX_SIGBUS:
|
|
return GDB_SIGNAL_BUS;
|
|
|
|
case LINUX_SIGFPE:
|
|
return GDB_SIGNAL_FPE;
|
|
|
|
case LINUX_SIGKILL:
|
|
return GDB_SIGNAL_KILL;
|
|
|
|
case LINUX_SIGUSR1:
|
|
return GDB_SIGNAL_USR1;
|
|
|
|
case LINUX_SIGSEGV:
|
|
return GDB_SIGNAL_SEGV;
|
|
|
|
case LINUX_SIGUSR2:
|
|
return GDB_SIGNAL_USR2;
|
|
|
|
case LINUX_SIGPIPE:
|
|
return GDB_SIGNAL_PIPE;
|
|
|
|
case LINUX_SIGALRM:
|
|
return GDB_SIGNAL_ALRM;
|
|
|
|
case LINUX_SIGTERM:
|
|
return GDB_SIGNAL_TERM;
|
|
|
|
case LINUX_SIGCHLD:
|
|
return GDB_SIGNAL_CHLD;
|
|
|
|
case LINUX_SIGCONT:
|
|
return GDB_SIGNAL_CONT;
|
|
|
|
case LINUX_SIGSTOP:
|
|
return GDB_SIGNAL_STOP;
|
|
|
|
case LINUX_SIGTSTP:
|
|
return GDB_SIGNAL_TSTP;
|
|
|
|
case LINUX_SIGTTIN:
|
|
return GDB_SIGNAL_TTIN;
|
|
|
|
case LINUX_SIGTTOU:
|
|
return GDB_SIGNAL_TTOU;
|
|
|
|
case LINUX_SIGURG:
|
|
return GDB_SIGNAL_URG;
|
|
|
|
case LINUX_SIGXCPU:
|
|
return GDB_SIGNAL_XCPU;
|
|
|
|
case LINUX_SIGXFSZ:
|
|
return GDB_SIGNAL_XFSZ;
|
|
|
|
case LINUX_SIGVTALRM:
|
|
return GDB_SIGNAL_VTALRM;
|
|
|
|
case LINUX_SIGPROF:
|
|
return GDB_SIGNAL_PROF;
|
|
|
|
case LINUX_SIGWINCH:
|
|
return GDB_SIGNAL_WINCH;
|
|
|
|
/* No way to differentiate between SIGIO and SIGPOLL.
|
|
Therefore, we just handle the first one. */
|
|
case LINUX_SIGIO:
|
|
return GDB_SIGNAL_IO;
|
|
|
|
case LINUX_SIGPWR:
|
|
return GDB_SIGNAL_PWR;
|
|
|
|
case LINUX_SIGSYS:
|
|
return GDB_SIGNAL_SYS;
|
|
|
|
/* SIGRTMIN and SIGRTMAX are not continuous in <gdb/signals.def>,
|
|
therefore we have to handle them here. */
|
|
case LINUX_SIGRTMIN:
|
|
return GDB_SIGNAL_REALTIME_32;
|
|
|
|
case LINUX_SIGRTMAX:
|
|
return GDB_SIGNAL_REALTIME_64;
|
|
}
|
|
|
|
if (signal >= LINUX_SIGRTMIN + 1 && signal <= LINUX_SIGRTMAX - 1)
|
|
{
|
|
int offset = signal - LINUX_SIGRTMIN + 1;
|
|
|
|
return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_33 + offset);
|
|
}
|
|
|
|
return GDB_SIGNAL_UNKNOWN;
|
|
}
|
|
|
|
/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
|
|
gdbarch.h. This function is not static because it is exported to
|
|
other -tdep files. */
|
|
|
|
int
|
|
linux_gdb_signal_to_target (struct gdbarch *gdbarch,
|
|
enum gdb_signal signal)
|
|
{
|
|
switch (signal)
|
|
{
|
|
case GDB_SIGNAL_0:
|
|
return 0;
|
|
|
|
case GDB_SIGNAL_HUP:
|
|
return LINUX_SIGHUP;
|
|
|
|
case GDB_SIGNAL_INT:
|
|
return LINUX_SIGINT;
|
|
|
|
case GDB_SIGNAL_QUIT:
|
|
return LINUX_SIGQUIT;
|
|
|
|
case GDB_SIGNAL_ILL:
|
|
return LINUX_SIGILL;
|
|
|
|
case GDB_SIGNAL_TRAP:
|
|
return LINUX_SIGTRAP;
|
|
|
|
case GDB_SIGNAL_ABRT:
|
|
return LINUX_SIGABRT;
|
|
|
|
case GDB_SIGNAL_FPE:
|
|
return LINUX_SIGFPE;
|
|
|
|
case GDB_SIGNAL_KILL:
|
|
return LINUX_SIGKILL;
|
|
|
|
case GDB_SIGNAL_BUS:
|
|
return LINUX_SIGBUS;
|
|
|
|
case GDB_SIGNAL_SEGV:
|
|
return LINUX_SIGSEGV;
|
|
|
|
case GDB_SIGNAL_SYS:
|
|
return LINUX_SIGSYS;
|
|
|
|
case GDB_SIGNAL_PIPE:
|
|
return LINUX_SIGPIPE;
|
|
|
|
case GDB_SIGNAL_ALRM:
|
|
return LINUX_SIGALRM;
|
|
|
|
case GDB_SIGNAL_TERM:
|
|
return LINUX_SIGTERM;
|
|
|
|
case GDB_SIGNAL_URG:
|
|
return LINUX_SIGURG;
|
|
|
|
case GDB_SIGNAL_STOP:
|
|
return LINUX_SIGSTOP;
|
|
|
|
case GDB_SIGNAL_TSTP:
|
|
return LINUX_SIGTSTP;
|
|
|
|
case GDB_SIGNAL_CONT:
|
|
return LINUX_SIGCONT;
|
|
|
|
case GDB_SIGNAL_CHLD:
|
|
return LINUX_SIGCHLD;
|
|
|
|
case GDB_SIGNAL_TTIN:
|
|
return LINUX_SIGTTIN;
|
|
|
|
case GDB_SIGNAL_TTOU:
|
|
return LINUX_SIGTTOU;
|
|
|
|
case GDB_SIGNAL_IO:
|
|
return LINUX_SIGIO;
|
|
|
|
case GDB_SIGNAL_XCPU:
|
|
return LINUX_SIGXCPU;
|
|
|
|
case GDB_SIGNAL_XFSZ:
|
|
return LINUX_SIGXFSZ;
|
|
|
|
case GDB_SIGNAL_VTALRM:
|
|
return LINUX_SIGVTALRM;
|
|
|
|
case GDB_SIGNAL_PROF:
|
|
return LINUX_SIGPROF;
|
|
|
|
case GDB_SIGNAL_WINCH:
|
|
return LINUX_SIGWINCH;
|
|
|
|
case GDB_SIGNAL_USR1:
|
|
return LINUX_SIGUSR1;
|
|
|
|
case GDB_SIGNAL_USR2:
|
|
return LINUX_SIGUSR2;
|
|
|
|
case GDB_SIGNAL_PWR:
|
|
return LINUX_SIGPWR;
|
|
|
|
case GDB_SIGNAL_POLL:
|
|
return LINUX_SIGPOLL;
|
|
|
|
/* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>,
|
|
therefore we have to handle it here. */
|
|
case GDB_SIGNAL_REALTIME_32:
|
|
return LINUX_SIGRTMIN;
|
|
|
|
/* Same comment applies to _64. */
|
|
case GDB_SIGNAL_REALTIME_64:
|
|
return LINUX_SIGRTMAX;
|
|
}
|
|
|
|
/* GDB_SIGNAL_REALTIME_33 to _64 are continuous. */
|
|
if (signal >= GDB_SIGNAL_REALTIME_33
|
|
&& signal <= GDB_SIGNAL_REALTIME_63)
|
|
{
|
|
int offset = signal - GDB_SIGNAL_REALTIME_33;
|
|
|
|
return LINUX_SIGRTMIN + 1 + offset;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* Rummage through mappings to find a mapping's size. */
|
|
|
|
static int
|
|
find_mapping_size (CORE_ADDR vaddr, unsigned long size,
|
|
int read, int write, int exec, int modified,
|
|
void *data)
|
|
{
|
|
struct mem_range *range = data;
|
|
|
|
if (vaddr == range->start)
|
|
{
|
|
range->length = size;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Helper for linux_vsyscall_range that does the real work of finding
|
|
the vsyscall's address range. */
|
|
|
|
static int
|
|
linux_vsyscall_range_raw (struct gdbarch *gdbarch, struct mem_range *range)
|
|
{
|
|
if (target_auxv_search (¤t_target, AT_SYSINFO_EHDR, &range->start) <= 0)
|
|
return 0;
|
|
|
|
/* This is installed by linux_init_abi below, so should always be
|
|
available. */
|
|
gdb_assert (gdbarch_find_memory_regions_p (target_gdbarch ()));
|
|
|
|
range->length = 0;
|
|
gdbarch_find_memory_regions (gdbarch, find_mapping_size, range);
|
|
return 1;
|
|
}
|
|
|
|
/* Implementation of the "vsyscall_range" gdbarch hook. Handles
|
|
caching, and defers the real work to linux_vsyscall_range_raw. */
|
|
|
|
static int
|
|
linux_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range)
|
|
{
|
|
struct linux_info *info = get_linux_inferior_data ();
|
|
|
|
if (info->vsyscall_range_p == 0)
|
|
{
|
|
if (linux_vsyscall_range_raw (gdbarch, &info->vsyscall_range))
|
|
info->vsyscall_range_p = 1;
|
|
else
|
|
info->vsyscall_range_p = -1;
|
|
}
|
|
|
|
if (info->vsyscall_range_p < 0)
|
|
return 0;
|
|
|
|
*range = info->vsyscall_range;
|
|
return 1;
|
|
}
|
|
|
|
/* Symbols for linux_infcall_mmap's ARG_FLAGS; their Linux MAP_* system
|
|
definitions would be dependent on compilation host. */
|
|
#define GDB_MMAP_MAP_PRIVATE 0x02 /* Changes are private. */
|
|
#define GDB_MMAP_MAP_ANONYMOUS 0x20 /* Don't use a file. */
|
|
|
|
/* See gdbarch.sh 'infcall_mmap'. */
|
|
|
|
static CORE_ADDR
|
|
linux_infcall_mmap (CORE_ADDR size, unsigned prot)
|
|
{
|
|
struct objfile *objf;
|
|
/* Do there still exist any Linux systems without "mmap64"?
|
|
"mmap" uses 64-bit off_t on x86_64 and 32-bit off_t on i386 and x32. */
|
|
struct value *mmap_val = find_function_in_inferior ("mmap64", &objf);
|
|
struct value *addr_val;
|
|
struct gdbarch *gdbarch = get_objfile_arch (objf);
|
|
CORE_ADDR retval;
|
|
enum
|
|
{
|
|
ARG_ADDR, ARG_LENGTH, ARG_PROT, ARG_FLAGS, ARG_FD, ARG_OFFSET, ARG_LAST
|
|
};
|
|
struct value *arg[ARG_LAST];
|
|
|
|
arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr,
|
|
0);
|
|
/* Assuming sizeof (unsigned long) == sizeof (size_t). */
|
|
arg[ARG_LENGTH] = value_from_ulongest
|
|
(builtin_type (gdbarch)->builtin_unsigned_long, size);
|
|
gdb_assert ((prot & ~(GDB_MMAP_PROT_READ | GDB_MMAP_PROT_WRITE
|
|
| GDB_MMAP_PROT_EXEC))
|
|
== 0);
|
|
arg[ARG_PROT] = value_from_longest (builtin_type (gdbarch)->builtin_int, prot);
|
|
arg[ARG_FLAGS] = value_from_longest (builtin_type (gdbarch)->builtin_int,
|
|
GDB_MMAP_MAP_PRIVATE
|
|
| GDB_MMAP_MAP_ANONYMOUS);
|
|
arg[ARG_FD] = value_from_longest (builtin_type (gdbarch)->builtin_int, -1);
|
|
arg[ARG_OFFSET] = value_from_longest (builtin_type (gdbarch)->builtin_int64,
|
|
0);
|
|
addr_val = call_function_by_hand (mmap_val, ARG_LAST, arg);
|
|
retval = value_as_address (addr_val);
|
|
if (retval == (CORE_ADDR) -1)
|
|
error (_("Failed inferior mmap call for %s bytes, errno is changed."),
|
|
pulongest (size));
|
|
return retval;
|
|
}
|
|
|
|
/* Display whether the gcore command is using the
|
|
/proc/PID/coredump_filter file. */
|
|
|
|
static void
|
|
show_use_coredump_filter (struct ui_file *file, int from_tty,
|
|
struct cmd_list_element *c, const char *value)
|
|
{
|
|
fprintf_filtered (file, _("Use of /proc/PID/coredump_filter file to generate"
|
|
" corefiles is %s.\n"), value);
|
|
}
|
|
|
|
/* To be called from the various GDB_OSABI_LINUX handlers for the
|
|
various GNU/Linux architectures and machine types. */
|
|
|
|
void
|
|
linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
|
{
|
|
set_gdbarch_core_pid_to_str (gdbarch, linux_core_pid_to_str);
|
|
set_gdbarch_info_proc (gdbarch, linux_info_proc);
|
|
set_gdbarch_core_info_proc (gdbarch, linux_core_info_proc);
|
|
set_gdbarch_find_memory_regions (gdbarch, linux_find_memory_regions);
|
|
set_gdbarch_make_corefile_notes (gdbarch, linux_make_corefile_notes);
|
|
set_gdbarch_has_shared_address_space (gdbarch,
|
|
linux_has_shared_address_space);
|
|
set_gdbarch_gdb_signal_from_target (gdbarch,
|
|
linux_gdb_signal_from_target);
|
|
set_gdbarch_gdb_signal_to_target (gdbarch,
|
|
linux_gdb_signal_to_target);
|
|
set_gdbarch_vsyscall_range (gdbarch, linux_vsyscall_range);
|
|
set_gdbarch_infcall_mmap (gdbarch, linux_infcall_mmap);
|
|
}
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
extern initialize_file_ftype _initialize_linux_tdep;
|
|
|
|
void
|
|
_initialize_linux_tdep (void)
|
|
{
|
|
linux_gdbarch_data_handle =
|
|
gdbarch_data_register_post_init (init_linux_gdbarch_data);
|
|
|
|
/* Set a cache per-inferior. */
|
|
linux_inferior_data
|
|
= register_inferior_data_with_cleanup (NULL, linux_inferior_data_cleanup);
|
|
/* Observers used to invalidate the cache when needed. */
|
|
observer_attach_inferior_exit (invalidate_linux_cache_inf);
|
|
observer_attach_inferior_appeared (invalidate_linux_cache_inf);
|
|
|
|
add_setshow_boolean_cmd ("use-coredump-filter", class_files,
|
|
&use_coredump_filter, _("\
|
|
Set whether gcore should consider /proc/PID/coredump_filter."),
|
|
_("\
|
|
Show whether gcore should consider /proc/PID/coredump_filter."),
|
|
_("\
|
|
Use this command to set whether gcore should consider the contents\n\
|
|
of /proc/PID/coredump_filter when generating the corefile. For more information\n\
|
|
about this file, refer to the manpage of core(5)."),
|
|
NULL, show_use_coredump_filter,
|
|
&setlist, &showlist);
|
|
}
|