X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=gdb%2Flinux-tdep.c;h=b8d063f66f7f6a4d293777b5208d89b2102afb02;hb=4ade44b727ee77adaa9c22719935d012e253a5e6;hp=c09d6e8719daca5d24db20017decec89ff0bf889;hpb=7b6bb8daaceb9ecf3f42dea57ae82733d6a3b2f6;p=external%2Fbinutils.git diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c index c09d6e8..b8d063f 100644 --- a/gdb/linux-tdep.c +++ b/gdb/linux-tdep.c @@ -1,6 +1,6 @@ /* Target-dependent code for GNU/Linux, architecture independent. - Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc. + Copyright (C) 2009-2016 Free Software Foundation, Inc. This file is part of GDB. @@ -22,8 +22,140 @@ #include "linux-tdep.h" #include "auxv.h" #include "target.h" +#include "gdbthread.h" +#include "gdbcore.h" +#include "regcache.h" +#include "regset.h" #include "elf/common.h" +#include "elf-bfd.h" /* for elfcore_write_* */ #include "inferior.h" +#include "cli/cli-utils.h" +#include "arch-utils.h" +#include "gdb_obstack.h" +#include "observer.h" +#include "objfiles.h" +#include "infcall.h" +#include "gdbcmd.h" +#include "gdb_regex.h" +#include "common/enum-flags.h" + +#include + +/* This enum represents the values that the user can choose when + informing the Linux kernel about which memory mappings will be + dumped in a corefile. They are described in the file + Documentation/filesystems/proc.txt, inside the Linux kernel + tree. */ + +enum filter_flag + { + COREFILTER_ANON_PRIVATE = 1 << 0, + COREFILTER_ANON_SHARED = 1 << 1, + COREFILTER_MAPPED_PRIVATE = 1 << 2, + COREFILTER_MAPPED_SHARED = 1 << 3, + COREFILTER_ELF_HEADERS = 1 << 4, + COREFILTER_HUGETLB_PRIVATE = 1 << 5, + COREFILTER_HUGETLB_SHARED = 1 << 6, + }; +DEF_ENUM_FLAGS_TYPE (enum filter_flag, filter_flags); + +/* This struct is used to map flags found in the "VmFlags:" field (in + the /proc//smaps file). */ + +struct smaps_vmflags + { + /* Zero if this structure has not been initialized yet. It + probably means that the Linux kernel being used does not emit + the "VmFlags:" field on "/proc/PID/smaps". */ + + unsigned int initialized_p : 1; + + /* Memory mapped I/O area (VM_IO, "io"). */ + + unsigned int io_page : 1; + + /* Area uses huge TLB pages (VM_HUGETLB, "ht"). */ + + unsigned int uses_huge_tlb : 1; + + /* Do not include this memory region on the coredump (VM_DONTDUMP, "dd"). */ + + unsigned int exclude_coredump : 1; + + /* Is this a MAP_SHARED mapping (VM_SHARED, "sh"). */ + + unsigned int shared_mapping : 1; + }; + +/* Whether to take the /proc/PID/coredump_filter into account when + generating a corefile. */ + +static int use_coredump_filter = 1; + +/* This enum represents the signals' numbers on a generic architecture + running the Linux kernel. The definition of "generic" comes from + the file , 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 + , 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 + , 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; @@ -41,17 +173,84 @@ init_linux_gdbarch_data (struct gdbarch *gdbarch) static struct linux_gdbarch_data * get_linux_gdbarch_data (struct gdbarch *gdbarch) { - return gdbarch_data (gdbarch, linux_gdbarch_data_handle); + return ((struct linux_gdbarch_data *) + gdbarch_data (gdbarch, linux_gdbarch_data_handle)); } -/* This function is suitable for architectures that don't - extend/override the standard siginfo structure. */ +/* Per-inferior data key. */ +static const struct inferior_data *linux_inferior_data; + +/* Linux-specific cached data. This is used by GDB for caching + purposes for each inferior. This helps reduce the overhead of + transfering data from a remote target to the local host. */ +struct linux_info +{ + /* Cache of the inferior's vsyscall/vDSO mapping range. Only valid + if VSYSCALL_RANGE_P is positive. This is cached because getting + at this info requires an auxv lookup (which is itself cached), + and looking through the inferior's mappings (which change + throughout execution and therefore cannot be cached). */ + struct mem_range vsyscall_range; + + /* Zero if we haven't tried looking up the vsyscall's range before + yet. Positive if we tried looking it up, and found it. Negative + if we tried looking it up but failed. */ + int vsyscall_range_p; +}; + +/* Frees whatever allocated space there is to be freed and sets INF's + linux cache data pointer to NULL. */ + +static void +invalidate_linux_cache_inf (struct inferior *inf) +{ + struct linux_info *info; + + info = (struct linux_info *) inferior_data (inf, linux_inferior_data); + if (info != NULL) + { + xfree (info); + set_inferior_data (inf, linux_inferior_data, NULL); + } +} + +/* Handles the cleanup of the linux cache for inferior INF. ARG is + ignored. Callback for the inferior_appeared and inferior_exit + events. */ + +static void +linux_inferior_data_cleanup (struct inferior *inf, void *arg) +{ + invalidate_linux_cache_inf (inf); +} + +/* Fetch the linux cache info for INF. This function always returns a + valid INFO pointer. */ + +static struct linux_info * +get_linux_inferior_data (void) +{ + struct linux_info *info; + struct inferior *inf = current_inferior (); + + info = (struct linux_info *) inferior_data (inf, linux_inferior_data); + if (info == NULL) + { + info = XCNEW (struct linux_info); + set_inferior_data (inf, linux_inferior_data, info); + } + + return info; +} + +/* See linux-tdep.h. */ struct type * -linux_get_siginfo_type (struct gdbarch *gdbarch) +linux_get_siginfo_type_with_fields (struct gdbarch *gdbarch, + linux_siginfo_extra_fields extra_fields) { struct linux_gdbarch_data *linux_gdbarch_data; - struct type *int_type, *uint_type, *long_type, *void_ptr_type; + struct type *int_type, *uint_type, *long_type, *void_ptr_type, *short_type; struct type *uid_type, *pid_type; struct type *sigval_type, *clock_type; struct type *siginfo_type, *sifields_type; @@ -67,6 +266,8 @@ linux_get_siginfo_type (struct gdbarch *gdbarch) 1, "unsigned int"); long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), 0, "long"); + short_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), + 0, "short"); void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); /* sival_t */ @@ -76,20 +277,20 @@ linux_get_siginfo_type (struct gdbarch *gdbarch) append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type); /* __pid_t */ - pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (int_type), - xstrdup ("__pid_t")); + pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, + TYPE_LENGTH (int_type), "__pid_t"); TYPE_TARGET_TYPE (pid_type) = int_type; TYPE_TARGET_STUB (pid_type) = 1; /* __uid_t */ - uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (uint_type), - xstrdup ("__uid_t")); + uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, + TYPE_LENGTH (uint_type), "__uid_t"); TYPE_TARGET_TYPE (uid_type) = uint_type; TYPE_TARGET_STUB (uid_type) = 1; /* __clock_t */ - clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (long_type), - xstrdup ("__clock_t")); + clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, + TYPE_LENGTH (long_type), "__clock_t"); TYPE_TARGET_TYPE (clock_type) = long_type; TYPE_TARGET_STUB (clock_type) = 1; @@ -142,6 +343,18 @@ linux_get_siginfo_type (struct gdbarch *gdbarch) /* _sigfault */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "si_addr", void_ptr_type); + + /* Additional bound fields for _sigfault in case they were requested. */ + if ((extra_fields & LINUX_SIGINFO_FIELD_ADDR_BND) != 0) + { + struct type *sigfault_bnd_fields; + + append_composite_type_field (type, "_addr_lsb", short_type); + sigfault_bnd_fields = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); + append_composite_type_field (sigfault_bnd_fields, "_lower", void_ptr_type); + append_composite_type_field (sigfault_bnd_fields, "_upper", void_ptr_type); + append_composite_type_field (type, "_addr_bnd", sigfault_bnd_fields); + } append_composite_type_field (sifields_type, "_sigfault", type); /* _sigpoll */ @@ -165,19 +378,31 @@ linux_get_siginfo_type (struct gdbarch *gdbarch) return siginfo_type; } +/* This function is suitable for architectures that don't + extend/override the standard siginfo structure. */ + +static struct type * +linux_get_siginfo_type (struct gdbarch *gdbarch) +{ + return linux_get_siginfo_type_with_fields (gdbarch, 0); +} + +/* Return true if the target is running on uClinux instead of normal + Linux kernel. */ + int -linux_has_shared_address_space (void) +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. */ @@ -196,18 +421,2086 @@ linux_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid) return normal_pid_to_str (ptid); } -/* To be called from the various GDB_OSABI_LINUX handlers for the - various GNU/Linux architectures and machine types. */ +/* Service function for corefiles and info proc. */ -void -linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) +static void +read_mapping (const char *line, + ULONGEST *addr, ULONGEST *endaddr, + const char **permissions, size_t *permissions_len, + ULONGEST *offset, + const char **device, size_t *device_len, + ULONGEST *inode, + const char **filename) { - set_gdbarch_core_pid_to_str (gdbarch, linux_core_pid_to_str); + const char *p = line; + + *addr = strtoulst (p, &p, 16); + if (*p == '-') + p++; + *endaddr = strtoulst (p, &p, 16); + + p = skip_spaces_const (p); + *permissions = p; + while (*p && !isspace (*p)) + p++; + *permissions_len = p - *permissions; + + *offset = strtoulst (p, &p, 16); + + p = skip_spaces_const (p); + *device = p; + while (*p && !isspace (*p)) + p++; + *device_len = p - *device; + + *inode = strtoulst (p, &p, 10); + + p = skip_spaces_const (p); + *filename = p; } -void -_initialize_linux_tdep (void) +/* Helper function to decode the "VmFlags" field in /proc/PID/smaps. + + This function was based on the documentation found on + , on the Linux kernel. + + Linux kernels before commit + 834f82e2aa9a8ede94b17b656329f850c1471514 (3.10) do not have this + field on smaps. */ + +static void +decode_vmflags (char *p, struct smaps_vmflags *v) { - linux_gdbarch_data_handle = - gdbarch_data_register_post_init (init_linux_gdbarch_data); + char *saveptr = NULL; + const char *s; + + v->initialized_p = 1; + p = skip_to_space (p); + p = skip_spaces (p); + + for (s = strtok_r (p, " ", &saveptr); + s != NULL; + s = strtok_r (NULL, " ", &saveptr)) + { + if (strcmp (s, "io") == 0) + v->io_page = 1; + else if (strcmp (s, "ht") == 0) + v->uses_huge_tlb = 1; + else if (strcmp (s, "dd") == 0) + v->exclude_coredump = 1; + else if (strcmp (s, "sh") == 0) + v->shared_mapping = 1; + } +} + +/* Return 1 if the memory mapping is anonymous, 0 otherwise. + + FILENAME is the name of the file present in the first line of the + memory mapping, in the "/proc/PID/smaps" output. For example, if + the first line is: + + 7fd0ca877000-7fd0d0da0000 r--p 00000000 fd:02 2100770 /path/to/file + + Then FILENAME will be "/path/to/file". */ + +static int +mapping_is_anonymous_p (const char *filename) +{ + static regex_t dev_zero_regex, shmem_file_regex, file_deleted_regex; + static int init_regex_p = 0; + + if (!init_regex_p) + { + 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 " + "' (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 (filter_flags 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 (NULL, 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 (NULL, 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 (NULL, 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 (NULL, 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 (NULL, 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 (NULL, 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 = (unsigned char *) 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. */ + filter_flags 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 (NULL, + coredumpfilter_name); + if (coredumpfilterdata != NULL) + { + unsigned int flags; + + sscanf (coredumpfilterdata, "%x", &flags); + filterflags = (enum filter_flag) flags; + xfree (coredumpfilterdata); + } + } + + xsnprintf (mapsfilename, sizeof mapsfilename, "/proc/%d/smaps", pid); + data = target_fileio_read_stralloc (NULL, 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 (NULL, 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, priv; + 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. */ + priv = 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, priv, + 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 + = (struct linux_find_memory_regions_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; +} + +/* 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 + = (struct linux_make_mappings_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 + = (struct linux_collect_regset_section_cb_data *) cb_data; + + if (data->abort_iteration) + return; + + gdb_assert (regset && regset->collect_regset); + + buf = (char *) 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 = (gdb_byte *) 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; + enum gdb_signal stop_signal; +}; + +/* Records the thread's register state for the corefile note + section. */ + +static void +linux_corefile_thread (struct thread_info *info, + struct linux_corefile_thread_data *args) +{ + 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); +} + +/* 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; + + 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 (NULL, 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, (char *) 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 (NULL, 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 (NULL, 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; + struct thread_info *curr_thr, *signalled_thr, *thr; + + 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 + + /* Like the kernel, prefer dumping the signalled thread first. + "First thread" is what tools use to infer the signalled thread. + In case there's more than one signalled thread, prefer the + current thread, if it is signalled. */ + curr_thr = inferior_thread (); + if (curr_thr->suspend.stop_signal != GDB_SIGNAL_0) + signalled_thr = curr_thr; + else + { + signalled_thr = iterate_over_threads (find_signalled_thread, NULL); + if (signalled_thr == NULL) + signalled_thr = curr_thr; + } + + thread_args.gdbarch = gdbarch; + thread_args.obfd = obfd; + thread_args.note_data = note_data; + thread_args.note_size = note_size; + thread_args.stop_signal = signalled_thr->suspend.stop_signal; + + linux_corefile_thread (signalled_thr, &thread_args); + ALL_NON_EXITED_THREADS (thr) + { + if (thr == signalled_thr) + continue; + if (ptid_get_pid (thr->ptid) != ptid_get_pid (inferior_ptid)) + continue; + + linux_corefile_thread (thr, &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 , + 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 , + 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 = (struct mem_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; +} + +/* See gdbarch.sh 'infcall_munmap'. */ + +static void +linux_infcall_munmap (CORE_ADDR addr, CORE_ADDR size) +{ + struct objfile *objf; + struct value *munmap_val = find_function_in_inferior ("munmap", &objf); + struct value *retval_val; + struct gdbarch *gdbarch = get_objfile_arch (objf); + LONGEST retval; + enum + { + ARG_ADDR, ARG_LENGTH, ARG_LAST + }; + struct value *arg[ARG_LAST]; + + arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr, + addr); + /* Assuming sizeof (unsigned long) == sizeof (size_t). */ + arg[ARG_LENGTH] = value_from_ulongest + (builtin_type (gdbarch)->builtin_unsigned_long, size); + retval_val = call_function_by_hand (munmap_val, ARG_LAST, arg); + retval = value_as_long (retval_val); + if (retval != 0) + warning (_("Failed inferior munmap call at %s for %s bytes, " + "errno is changed."), + hex_string (addr), pulongest (size)); +} + +/* See linux-tdep.h. */ + +CORE_ADDR +linux_displaced_step_location (struct gdbarch *gdbarch) +{ + CORE_ADDR addr; + int bp_len; + + /* Determine entry point from target auxiliary vector. This avoids + the need for symbols. Also, when debugging a stand-alone SPU + executable, entry_point_address () will point to an SPU + local-store address and is thus not usable as displaced stepping + location. The auxiliary vector gets us the PowerPC-side entry + point address instead. */ + if (target_auxv_search (¤t_target, AT_ENTRY, &addr) <= 0) + throw_error (NOT_SUPPORTED_ERROR, + _("Cannot find AT_ENTRY auxiliary vector entry.")); + + /* Make certain that the address points at real code, and not a + function descriptor. */ + addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr, + ¤t_target); + + /* Inferior calls also use the entry point as a breakpoint location. + We don't want displaced stepping to interfere with those + breakpoints, so leave space. */ + gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len); + addr += bp_len * 2; + + return addr; +} + +/* 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); + set_gdbarch_infcall_munmap (gdbarch, linux_infcall_munmap); + set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type); +} + +/* 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); }