/* Target-dependent code for GNU/Linux, architecture independent.
- Copyright (C) 2009-2012 Free Software Foundation, Inc.
+ Copyright (C) 2009-2014 Free Software Foundation, Inc.
This file is part of GDB.
#include "elf-bfd.h" /* for elfcore_write_* */
#include "inferior.h"
#include "cli/cli-utils.h"
+#include "arch-utils.h"
+#include "gdb_obstack.h"
#include <ctype.h>
+/* This enum represents the signals' numbers on a generic architecture
+ running the Linux kernel. The definition of "generic" comes from
+ the file <include/uapi/asm-generic/signal.h>, from the Linux kernel
+ tree, which is the "de facto" implementation of signal numbers to
+ be used by new architecture ports.
+
+ For those architectures which have differences between the generic
+ standard (e.g., Alpha), we define the different signals (and *only*
+ those) in the specific target-dependent file (e.g.,
+ alpha-linux-tdep.c, for Alpha). Please refer to the architecture's
+ tdep file for more information.
+
+ ARM deserves a special mention here. On the file
+ <arch/arm/include/uapi/asm/signal.h>, it defines only one different
+ (and ARM-only) signal, which is SIGSWI, with the same number as
+ SIGRTMIN. This signal is used only for a very specific target,
+ called ArthurOS (from RISCOS). Therefore, we do not handle it on
+ the ARM-tdep file, and we can safely use the generic signal handler
+ here for ARM targets.
+
+ As stated above, this enum is derived from
+ <include/uapi/asm-generic/signal.h>, from the Linux kernel
+ tree. */
+
+enum
+ {
+ LINUX_SIGHUP = 1,
+ LINUX_SIGINT = 2,
+ LINUX_SIGQUIT = 3,
+ LINUX_SIGILL = 4,
+ LINUX_SIGTRAP = 5,
+ LINUX_SIGABRT = 6,
+ LINUX_SIGIOT = 6,
+ LINUX_SIGBUS = 7,
+ LINUX_SIGFPE = 8,
+ LINUX_SIGKILL = 9,
+ LINUX_SIGUSR1 = 10,
+ LINUX_SIGSEGV = 11,
+ LINUX_SIGUSR2 = 12,
+ LINUX_SIGPIPE = 13,
+ LINUX_SIGALRM = 14,
+ LINUX_SIGTERM = 15,
+ LINUX_SIGSTKFLT = 16,
+ LINUX_SIGCHLD = 17,
+ LINUX_SIGCONT = 18,
+ LINUX_SIGSTOP = 19,
+ LINUX_SIGTSTP = 20,
+ LINUX_SIGTTIN = 21,
+ LINUX_SIGTTOU = 22,
+ LINUX_SIGURG = 23,
+ LINUX_SIGXCPU = 24,
+ LINUX_SIGXFSZ = 25,
+ LINUX_SIGVTALRM = 26,
+ LINUX_SIGPROF = 27,
+ LINUX_SIGWINCH = 28,
+ LINUX_SIGIO = 29,
+ LINUX_SIGPOLL = LINUX_SIGIO,
+ LINUX_SIGPWR = 30,
+ LINUX_SIGSYS = 31,
+ LINUX_SIGUNUSED = 31,
+
+ LINUX_SIGRTMIN = 32,
+ LINUX_SIGRTMAX = 64,
+ };
+
static struct gdbarch_data *linux_gdbarch_data_handle;
struct linux_gdbarch_data
return siginfo_type;
}
-static int
-linux_has_shared_address_space (struct gdbarch *gdbarch)
+/* Return true if the target is running on uClinux instead of normal
+ Linux kernel. */
+
+int
+linux_is_uclinux (void)
{
- /* Determine whether we are running on uClinux or normal Linux
- kernel. */
CORE_ADDR dummy;
- int target_is_uclinux;
- target_is_uclinux
- = (target_auxv_search (¤t_target, AT_NULL, &dummy) > 0
- && target_auxv_search (¤t_target, AT_PAGESZ, &dummy) == 0);
+ return (target_auxv_search (¤t_target, AT_NULL, &dummy) > 0
+ && target_auxv_search (¤t_target, AT_PAGESZ, &dummy) == 0);
+}
- return target_is_uclinux;
+static int
+linux_has_shared_address_space (struct gdbarch *gdbarch)
+{
+ return linux_is_uclinux ();
}
/* This is how we want PTIDs from core files to be printed. */
p++;
*endaddr = strtoulst (p, &p, 16);
- while (*p && isspace (*p))
- p++;
+ p = skip_spaces_const (p);
*permissions = p;
while (*p && !isspace (*p))
p++;
*offset = strtoulst (p, &p, 16);
- while (*p && isspace (*p))
- p++;
+ p = skip_spaces_const (p);
*device = p;
while (*p && !isspace (*p))
p++;
*inode = strtoulst (p, &p, 10);
- while (*p && isspace (*p))
- p++;
+ p = skip_spaces_const (p);
*filename = p;
}
/* Implement the "info proc" command. */
static void
-linux_info_proc (struct gdbarch *gdbarch, char *args,
+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
int status_f = (what == IP_STATUS || what == IP_ALL);
int stat_f = (what == IP_STAT || what == IP_ALL);
char filename[100];
- gdb_byte *data;
+ char *data;
int target_errno;
if (args && isdigit (args[0]))
- pid = strtoul (args, &args, 10);
+ {
+ char *tem;
+
+ pid = strtoul (args, &tem, 10);
+ args = tem;
+ }
else
{
if (!target_has_execution)
pid = current_inferior ()->pid;
}
- args = skip_spaces (args);
+ args = skip_spaces_const (args);
if (args && args[0])
error (_("Too many parameters: %s"), args);
printf_filtered (_("Process: %s\n"),
pulongest (strtoulst (p, &p, 10)));
- while (*p && isspace (*p))
- p++;
+ p = skip_spaces_const (p);
if (*p == '(')
{
- const char *ep = strchr (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",
}
}
- while (*p && isspace (*p))
- p++;
+ p = skip_spaces_const (p);
if (*p)
printf_filtered (_("State: %c\n"), *p++);
}
}
+/* 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 (struct gdbarch *gdbarch,
- find_memory_region_ftype func, void *obfd)
+linux_find_memory_regions_full (struct gdbarch *gdbarch,
+ linux_find_memory_region_ftype *func,
+ void *obfd)
{
- char filename[100];
- gdb_byte *data;
+ char mapsfilename[100];
+ char *data;
/* We need to know the real target PID to access /proc. */
if (current_inferior ()->fake_pid_p)
return 1;
- xsnprintf (filename, sizeof filename,
- "/proc/%d/maps", current_inferior ()->pid);
- data = target_fileio_read_stralloc (filename);
+ xsnprintf (mapsfilename, sizeof mapsfilename,
+ "/proc/%d/smaps", current_inferior ()->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", current_inferior ()->pid);
+ data = target_fileio_read_stralloc (mapsfilename);
+ }
if (data)
{
struct cleanup *cleanup = make_cleanup (xfree, data);
char *line;
- for (line = strtok (data, "\n"); line; line = strtok (NULL, "\n"))
+ line = strtok (data, "\n");
+ while (line)
{
ULONGEST addr, endaddr, offset, inode;
const char *permissions, *device, *filename;
size_t permissions_len, device_len;
int read, write, exec;
+ int modified = 0, has_anonymous = 0;
read_mapping (line, &addr, &endaddr, &permissions, &permissions_len,
&offset, &device, &device_len, &inode, &filename);
write = (memchr (permissions, 'w', permissions_len) != 0);
exec = (memchr (permissions, 'x', permissions_len) != 0);
+ /* Try to detect if region was modified by parsing smaps counters. */
+ for (line = strtok (NULL, "\n");
+ line && line[0] >= 'A' && line[0] <= 'Z';
+ line = strtok (NULL, "\n"))
+ {
+ char keyword[64 + 1];
+
+ if (sscanf (line, "%64s", keyword) != 1)
+ {
+ warning (_("Error parsing {s,}maps file '%s'"), mapsfilename);
+ break;
+ }
+ if (strcmp (keyword, "Anonymous:") == 0)
+ has_anonymous = 1;
+ if (strcmp (keyword, "Shared_Dirty:") == 0
+ || strcmp (keyword, "Private_Dirty:") == 0
+ || strcmp (keyword, "Swap:") == 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)
+ modified = 1;
+ }
+ }
+
+ /* Older Linux kernels did not support the "Anonymous:" counter.
+ If it is missing, we can't be sure - dump all the pages. */
+ if (!has_anonymous)
+ modified = 1;
+
/* Invoke the callback function to create the corefile segment. */
- func (addr, endaddr - addr, read, write, exec, obfd);
+ func (addr, endaddr - addr, offset, inode,
+ read, write, exec, modified, filename, obfd);
}
do_cleanups (cleanup);
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 != TARGET_SIGNAL_0
+ if (info->suspend.stop_signal != GDB_SIGNAL_0
&& ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid))
return 1;
if (info)
return info->suspend.stop_signal;
else
- return TARGET_SIGNAL_0;
+ return GDB_SIGNAL_0;
}
/* Generate corefile notes for SPU contexts. */
"proxydma_info",
};
- enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
gdb_byte *spu_ids;
LONGEST i, j, size;
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;
+}
+
/* Records the thread's register state for the corefile note
section. */
return 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;
bfd *obfd;
char *note_data;
int *note_size;
- int num_notes;
enum gdb_signal stop_signal;
linux_collect_thread_registers_ftype collect;
};
{
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 = args->collect (regcache, info->ptid, args->obfd,
args->note_data, args->note_size,
args->stop_signal);
- args->num_notes++;
+
+ /* 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;
+}
+
/* Fills the "to_make_corefile_note" target vector. Builds the note
section for a corefile, and returns it in a malloc buffer. */
linux_collect_thread_registers_ftype collect)
{
struct linux_corefile_thread_data thread_args;
+ struct elf_internal_linux_prpsinfo prpsinfo;
char *note_data = NULL;
gdb_byte *auxv;
int auxv_len;
- /* Process information. */
- if (get_exec_file (0))
+ if (linux_fill_prpsinfo (&prpsinfo))
{
- const char *fname = lbasename (get_exec_file (0));
- char *psargs = xstrdup (fname);
-
- if (get_inferior_args ())
- psargs = reconcat (psargs, psargs, " ", get_inferior_args (),
- (char *) NULL);
-
- note_data = elfcore_write_prpsinfo (obfd, note_data, note_size,
- fname, psargs);
- xfree (psargs);
-
- if (!note_data)
- return NULL;
+ 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. */
thread_args.obfd = obfd;
thread_args.note_data = note_data;
thread_args.note_size = note_size;
- thread_args.num_notes = 0;
thread_args.stop_signal = find_stop_signal ();
thread_args.collect = collect;
iterate_over_threads (linux_corefile_thread_callback, &thread_args);
if (!note_data)
return NULL;
- make_cleanup (xfree, note_data);
+ /* File mappings. */
+ note_data = linux_make_mappings_corefile_notes (gdbarch, obfd,
+ note_data, note_size);
+
return note_data;
}
linux_collect_thread_registers);
}
+/* 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;
+}
+
/* To be called from the various GDB_OSABI_LINUX handlers for the
various GNU/Linux architectures and machine types. */
{
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_1);
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);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
projects / deliverable / binutils-gdb.git / blobdiff