/* Target-dependent code for FreeBSD, architecture-independent. Copyright (C) 2002-2018 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #include "defs.h" #include "auxv.h" #include "gdbcore.h" #include "inferior.h" #include "regcache.h" #include "regset.h" #include "gdbthread.h" #include "xml-syscall.h" #include "elf-bfd.h" #include "fbsd-tdep.h" /* FreeBSD kernels 12.0 and later include a copy of the 'ptrace_lwpinfo' structure returned by the PT_LWPINFO ptrace operation in an ELF core note (NT_FREEBSD_PTLWPINFO) for each LWP. The constants below define the offset of field members and flags in this structure used by methods in this file. Note that the 'ptrace_lwpinfo' struct in the note is preceded by a 4 byte integer containing the size of the structure. */ #define LWPINFO_OFFSET 0x4 /* Offsets in ptrace_lwpinfo. */ #define LWPINFO_PL_FLAGS 0x8 #define LWPINFO64_PL_SIGINFO 0x30 #define LWPINFO32_PL_SIGINFO 0x2c /* Flags in pl_flags. */ #define PL_FLAG_SI 0x20 /* siginfo is valid */ /* Sizes of siginfo_t. */ #define SIZE64_SIGINFO_T 80 #define SIZE32_SIGINFO_T 64 /* Offsets in data structure used in NT_FREEBSD_PROCSTAT_VMMAP core dump notes. See for the definition of struct kinfo_vmentry. This data structure should have the same layout on all architectures. */ #define KVE_STRUCTSIZE 0x0 #define KVE_START 0x8 #define KVE_END 0x10 #define KVE_OFFSET 0x18 #define KVE_FLAGS 0x2c #define KVE_PROTECTION 0x38 #define KVE_PATH 0x88 /* Flags in the 'kve_protection' field in struct kinfo_vmentry. These match the KVME_PROT_* constants in . */ #define KINFO_VME_PROT_READ 0x00000001 #define KINFO_VME_PROT_WRITE 0x00000002 #define KINFO_VME_PROT_EXEC 0x00000004 /* Flags in the 'kve_flags' field in struct kinfo_vmentry. These match the KVME_FLAG_* constants in . */ #define KINFO_VME_FLAG_COW 0x00000001 #define KINFO_VME_FLAG_NEEDS_COPY 0x00000002 #define KINFO_VME_FLAG_NOCOREDUMP 0x00000004 #define KINFO_VME_FLAG_SUPER 0x00000008 #define KINFO_VME_FLAG_GROWS_UP 0x00000010 #define KINFO_VME_FLAG_GROWS_DOWN 0x00000020 /* Offsets in data structure used in NT_FREEBSD_PROCSTAT_FILES core dump notes. See for the definition of struct kinfo_file. This data structure should have the same layout on all architectures. */ #define KF_STRUCTSIZE 0x0 #define KF_TYPE 0x4 #define KF_FD 0x8 #define KF_PATH 0x170 /* Constants for the 'kf_type' field in struct kinfo_file. These match the KF_TYPE_* constants in . */ #define KINFO_FILE_TYPE_VNODE 1 /* Special values for the 'kf_fd' field in struct kinfo_file. These match the KF_FD_TYPE_* constants in . */ #define KINFO_FILE_FD_TYPE_CWD -1 #define KINFO_FILE_FD_TYPE_TEXT -5 /* Number of 32-bit words in a signal set. This matches _SIG_WORDS in and is the same value on all architectures. */ #define SIG_WORDS 4 /* Offsets in data structure used in NT_FREEBSD_PROCSTAT_PROC core dump notes. See for the definition of struct kinfo_proc. This data structure has different layouts on different architectures mostly due to ILP32 vs LP64. However, FreeBSD/i386 uses a 32-bit time_t while all other architectures use a 64-bit time_t. The core dump note actually contains one kinfo_proc structure for each thread, but all of the process-wide data can be obtained from the first structure. One result of this note's format is that some of the process-wide status available in the native target method from the kern.proc.pid. sysctl such as ki_stat and ki_siglist is not available from a core dump. Instead, the per-thread data structures contain the value of these fields for individual threads. */ struct kinfo_proc_layout { /* Offsets of struct kinfo_proc members. */ int ki_layout; int ki_pid; int ki_ppid; int ki_pgid; int ki_tpgid; int ki_sid; int ki_tdev_freebsd11; int ki_sigignore; int ki_sigcatch; int ki_uid; int ki_ruid; int ki_svuid; int ki_rgid; int ki_svgid; int ki_ngroups; int ki_groups; int ki_size; int ki_rssize; int ki_tsize; int ki_dsize; int ki_ssize; int ki_start; int ki_nice; int ki_comm; int ki_tdev; int ki_rusage; int ki_rusage_ch; /* Offsets of struct rusage members. */ int ru_utime; int ru_stime; int ru_maxrss; int ru_minflt; int ru_majflt; }; const struct kinfo_proc_layout kinfo_proc_layout_32 = { .ki_layout = 0x4, .ki_pid = 0x28, .ki_ppid = 0x2c, .ki_pgid = 0x30, .ki_tpgid = 0x34, .ki_sid = 0x38, .ki_tdev_freebsd11 = 0x44, .ki_sigignore = 0x68, .ki_sigcatch = 0x78, .ki_uid = 0x88, .ki_ruid = 0x8c, .ki_svuid = 0x90, .ki_rgid = 0x94, .ki_svgid = 0x98, .ki_ngroups = 0x9c, .ki_groups = 0xa0, .ki_size = 0xe0, .ki_rssize = 0xe4, .ki_tsize = 0xec, .ki_dsize = 0xf0, .ki_ssize = 0xf4, .ki_start = 0x118, .ki_nice = 0x145, .ki_comm = 0x17f, .ki_tdev = 0x1f0, .ki_rusage = 0x220, .ki_rusage_ch = 0x278, .ru_utime = 0x0, .ru_stime = 0x10, .ru_maxrss = 0x20, .ru_minflt = 0x30, .ru_majflt = 0x34, }; const struct kinfo_proc_layout kinfo_proc_layout_i386 = { .ki_layout = 0x4, .ki_pid = 0x28, .ki_ppid = 0x2c, .ki_pgid = 0x30, .ki_tpgid = 0x34, .ki_sid = 0x38, .ki_tdev_freebsd11 = 0x44, .ki_sigignore = 0x68, .ki_sigcatch = 0x78, .ki_uid = 0x88, .ki_ruid = 0x8c, .ki_svuid = 0x90, .ki_rgid = 0x94, .ki_svgid = 0x98, .ki_ngroups = 0x9c, .ki_groups = 0xa0, .ki_size = 0xe0, .ki_rssize = 0xe4, .ki_tsize = 0xec, .ki_dsize = 0xf0, .ki_ssize = 0xf4, .ki_start = 0x118, .ki_nice = 0x135, .ki_comm = 0x16f, .ki_tdev = 0x1e0, .ki_rusage = 0x210, .ki_rusage_ch = 0x258, .ru_utime = 0x0, .ru_stime = 0x8, .ru_maxrss = 0x10, .ru_minflt = 0x20, .ru_majflt = 0x24, }; const struct kinfo_proc_layout kinfo_proc_layout_64 = { .ki_layout = 0x4, .ki_pid = 0x48, .ki_ppid = 0x4c, .ki_pgid = 0x50, .ki_tpgid = 0x54, .ki_sid = 0x58, .ki_tdev_freebsd11 = 0x64, .ki_sigignore = 0x88, .ki_sigcatch = 0x98, .ki_uid = 0xa8, .ki_ruid = 0xac, .ki_svuid = 0xb0, .ki_rgid = 0xb4, .ki_svgid = 0xb8, .ki_ngroups = 0xbc, .ki_groups = 0xc0, .ki_size = 0x100, .ki_rssize = 0x108, .ki_tsize = 0x118, .ki_dsize = 0x120, .ki_ssize = 0x128, .ki_start = 0x150, .ki_nice = 0x185, .ki_comm = 0x1bf, .ki_tdev = 0x230, .ki_rusage = 0x260, .ki_rusage_ch = 0x2f0, .ru_utime = 0x0, .ru_stime = 0x10, .ru_maxrss = 0x20, .ru_minflt = 0x40, .ru_majflt = 0x48, }; static struct gdbarch_data *fbsd_gdbarch_data_handle; struct fbsd_gdbarch_data { struct type *siginfo_type; }; static void * init_fbsd_gdbarch_data (struct gdbarch *gdbarch) { return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct fbsd_gdbarch_data); } static struct fbsd_gdbarch_data * get_fbsd_gdbarch_data (struct gdbarch *gdbarch) { return ((struct fbsd_gdbarch_data *) gdbarch_data (gdbarch, fbsd_gdbarch_data_handle)); } /* This is how we want PTIDs from core files to be printed. */ static const char * fbsd_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid) { static char buf[80]; if (ptid.lwp () != 0) { xsnprintf (buf, sizeof buf, "LWP %ld", ptid.lwp ()); return buf; } return normal_pid_to_str (ptid); } /* Extract the name assigned to a thread from a core. Returns the string in a static buffer. */ static const char * fbsd_core_thread_name (struct gdbarch *gdbarch, struct thread_info *thr) { static char buf[80]; struct bfd_section *section; bfd_size_type size; if (thr->ptid.lwp () != 0) { /* FreeBSD includes a NT_FREEBSD_THRMISC note for each thread whose contents are defined by a "struct thrmisc" declared in on FreeBSD. The per-thread name is stored as a null-terminated string as the first member of the structure. Rather than define the full structure here, just extract the null-terminated name from the start of the note. */ thread_section_name section_name (".thrmisc", thr->ptid); section = bfd_get_section_by_name (core_bfd, section_name.c_str ()); if (section != NULL && bfd_section_size (core_bfd, section) > 0) { /* Truncate the name if it is longer than "buf". */ size = bfd_section_size (core_bfd, section); if (size > sizeof buf - 1) size = sizeof buf - 1; if (bfd_get_section_contents (core_bfd, section, buf, (file_ptr) 0, size) && buf[0] != '\0') { buf[size] = '\0'; /* Note that each thread will report the process command as its thread name instead of an empty name if a name has not been set explicitly. Return a NULL name in that case. */ if (strcmp (buf, elf_tdata (core_bfd)->core->program) != 0) return buf; } } } return NULL; } /* Implement the "core_xfer_siginfo" gdbarch method. */ static LONGEST fbsd_core_xfer_siginfo (struct gdbarch *gdbarch, gdb_byte *readbuf, ULONGEST offset, ULONGEST len) { size_t siginfo_size; if (gdbarch_long_bit (gdbarch) == 32) siginfo_size = SIZE32_SIGINFO_T; else siginfo_size = SIZE64_SIGINFO_T; if (offset > siginfo_size) return -1; thread_section_name section_name (".note.freebsdcore.lwpinfo", inferior_ptid); asection *section = bfd_get_section_by_name (core_bfd, section_name.c_str ()); if (section == NULL) return -1; gdb_byte buf[4]; if (!bfd_get_section_contents (core_bfd, section, buf, LWPINFO_OFFSET + LWPINFO_PL_FLAGS, 4)) return -1; int pl_flags = extract_signed_integer (buf, 4, gdbarch_byte_order (gdbarch)); if (!(pl_flags & PL_FLAG_SI)) return -1; if (offset + len > siginfo_size) len = siginfo_size - offset; ULONGEST siginfo_offset; if (gdbarch_long_bit (gdbarch) == 32) siginfo_offset = LWPINFO_OFFSET + LWPINFO32_PL_SIGINFO; else siginfo_offset = LWPINFO_OFFSET + LWPINFO64_PL_SIGINFO; if (!bfd_get_section_contents (core_bfd, section, readbuf, siginfo_offset + offset, len)) return -1; return len; } static int find_signalled_thread (struct thread_info *info, void *data) { if (info->suspend.stop_signal != GDB_SIGNAL_0 && info->ptid.pid () == inferior_ptid.pid ()) return 1; return 0; } /* Structure for passing information from fbsd_collect_thread_registers via an iterator to fbsd_collect_regset_section_cb. */ struct fbsd_collect_regset_section_cb_data { const struct regcache *regcache; bfd *obfd; char *note_data; int *note_size; unsigned long lwp; enum gdb_signal stop_signal; int abort_iteration; }; static void fbsd_collect_regset_section_cb (const char *sect_name, int supply_size, int collect_size, const struct regset *regset, const char *human_name, void *cb_data) { char *buf; struct fbsd_collect_regset_section_cb_data *data = (struct fbsd_collect_regset_section_cb_data *) cb_data; if (data->abort_iteration) return; gdb_assert (regset->collect_regset); buf = (char *) xmalloc (collect_size); regset->collect_regset (regset, data->regcache, -1, buf, collect_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, collect_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 * fbsd_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 = regcache->arch (); struct fbsd_collect_regset_section_cb_data data; 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; data.lwp = ptid.lwp (); gdbarch_iterate_over_regset_sections (gdbarch, fbsd_collect_regset_section_cb, &data, regcache); return data.note_data; } struct fbsd_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 fbsd_corefile_thread (struct thread_info *info, struct fbsd_corefile_thread_data *args) { struct regcache *regcache; regcache = get_thread_arch_regcache (info->ptid, args->gdbarch); target_fetch_registers (regcache, -1); args->note_data = fbsd_collect_thread_registers (regcache, info->ptid, args->obfd, args->note_data, args->note_size, args->stop_signal); } /* Return a byte_vector containing the contents of a core dump note for the target object of type OBJECT. If STRUCTSIZE is non-zero, the data is prefixed with a 32-bit integer size to match the format used in FreeBSD NT_PROCSTAT_* notes. */ static gdb::optional fbsd_make_note_desc (enum target_object object, uint32_t structsize) { gdb::optional buf = target_read_alloc (current_top_target (), object, NULL); if (!buf || buf->empty ()) return {}; if (structsize == 0) return buf; gdb::byte_vector desc (sizeof (structsize) + buf->size ()); memcpy (desc.data (), &structsize, sizeof (structsize)); memcpy (desc.data () + sizeof (structsize), buf->data (), buf->size ()); return desc; } /* Create appropriate note sections for a corefile, returning them in allocated memory. */ static char * fbsd_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size) { struct fbsd_corefile_thread_data thread_args; char *note_data = NULL; Elf_Internal_Ehdr *i_ehdrp; struct thread_info *curr_thr, *signalled_thr, *thr; /* Put a "FreeBSD" label in the ELF header. */ i_ehdrp = elf_elfheader (obfd); i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD; gdb_assert (gdbarch_iterate_over_regset_sections_p (gdbarch)); if (get_exec_file (0)) { 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); } /* 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; fbsd_corefile_thread (signalled_thr, &thread_args); ALL_NON_EXITED_THREADS (thr) { if (thr == signalled_thr) continue; if (thr->ptid.pid () != inferior_ptid.pid ()) continue; fbsd_corefile_thread (thr, &thread_args); } note_data = thread_args.note_data; /* Auxiliary vector. */ uint32_t structsize = gdbarch_ptr_bit (gdbarch) / 4; /* Elf_Auxinfo */ gdb::optional note_desc = fbsd_make_note_desc (TARGET_OBJECT_AUXV, structsize); if (note_desc && !note_desc->empty ()) { note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD", NT_FREEBSD_PROCSTAT_AUXV, note_desc->data (), note_desc->size ()); if (!note_data) return NULL; } /* Virtual memory mappings. */ note_desc = fbsd_make_note_desc (TARGET_OBJECT_FREEBSD_VMMAP, 0); if (note_desc && !note_desc->empty ()) { note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD", NT_FREEBSD_PROCSTAT_VMMAP, note_desc->data (), note_desc->size ()); if (!note_data) return NULL; } note_desc = fbsd_make_note_desc (TARGET_OBJECT_FREEBSD_PS_STRINGS, 0); if (note_desc && !note_desc->empty ()) { note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD", NT_FREEBSD_PROCSTAT_PSSTRINGS, note_desc->data (), note_desc->size ()); if (!note_data) return NULL; } return note_data; } /* Helper function to generate mappings flags for a single VM map entry in 'info proc mappings'. */ const char * fbsd_vm_map_entry_flags (int kve_flags, int kve_protection) { static char vm_flags[9]; vm_flags[0] = (kve_protection & KINFO_VME_PROT_READ) ? 'r' : '-'; vm_flags[1] = (kve_protection & KINFO_VME_PROT_WRITE) ? 'w' : '-'; vm_flags[2] = (kve_protection & KINFO_VME_PROT_EXEC) ? 'x' : '-'; vm_flags[3] = ' '; vm_flags[4] = (kve_flags & KINFO_VME_FLAG_COW) ? 'C' : '-'; vm_flags[5] = (kve_flags & KINFO_VME_FLAG_NEEDS_COPY) ? 'N' : '-'; vm_flags[6] = (kve_flags & KINFO_VME_FLAG_SUPER) ? 'S' : '-'; vm_flags[7] = (kve_flags & KINFO_VME_FLAG_GROWS_UP) ? 'U' : (kve_flags & KINFO_VME_FLAG_GROWS_DOWN) ? 'D' : '-'; vm_flags[8] = '\0'; return vm_flags; } /* Implement "info proc mappings" for a corefile. */ static void fbsd_core_info_proc_mappings (struct gdbarch *gdbarch) { asection *section; unsigned char *descdata, *descend; size_t note_size; section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.vmmap"); if (section == NULL) { warning (_("unable to find mappings in core file")); return; } note_size = bfd_get_section_size (section); if (note_size < 4) error (_("malformed core note - too short for header")); gdb::def_vector contents (note_size); if (!bfd_get_section_contents (core_bfd, section, contents.data (), 0, note_size)) error (_("could not get core note contents")); descdata = contents.data (); descend = descdata + note_size; /* Skip over the structure size. */ descdata += 4; printf_filtered (_("Mapped address spaces:\n\n")); if (gdbarch_addr_bit (gdbarch) == 64) { printf_filtered (" %18s %18s %10s %10s %9s %s\n", "Start Addr", " End Addr", " Size", " Offset", "Flags ", "File"); } else { printf_filtered ("\t%10s %10s %10s %10s %9s %s\n", "Start Addr", " End Addr", " Size", " Offset", "Flags ", "File"); } while (descdata + KVE_PATH < descend) { ULONGEST start, end, offset, flags, prot, structsize; structsize = bfd_get_32 (core_bfd, descdata + KVE_STRUCTSIZE); if (structsize < KVE_PATH) error (_("malformed core note - vmmap entry too small")); start = bfd_get_64 (core_bfd, descdata + KVE_START); end = bfd_get_64 (core_bfd, descdata + KVE_END); offset = bfd_get_64 (core_bfd, descdata + KVE_OFFSET); flags = bfd_get_32 (core_bfd, descdata + KVE_FLAGS); prot = bfd_get_32 (core_bfd, descdata + KVE_PROTECTION); if (gdbarch_addr_bit (gdbarch) == 64) { printf_filtered (" %18s %18s %10s %10s %9s %s\n", paddress (gdbarch, start), paddress (gdbarch, end), hex_string (end - start), hex_string (offset), fbsd_vm_map_entry_flags (flags, prot), descdata + KVE_PATH); } else { printf_filtered ("\t%10s %10s %10s %10s %9s %s\n", paddress (gdbarch, start), paddress (gdbarch, end), hex_string (end - start), hex_string (offset), fbsd_vm_map_entry_flags (flags, prot), descdata + KVE_PATH); } descdata += structsize; } } /* Fetch the pathname of a vnode for a single file descriptor from the file table core note. */ static gdb::unique_xmalloc_ptr fbsd_core_vnode_path (struct gdbarch *gdbarch, int fd) { asection *section; unsigned char *descdata, *descend; size_t note_size; section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.files"); if (section == NULL) return nullptr; note_size = bfd_get_section_size (section); if (note_size < 4) error (_("malformed core note - too short for header")); gdb::def_vector contents (note_size); if (!bfd_get_section_contents (core_bfd, section, contents.data (), 0, note_size)) error (_("could not get core note contents")); descdata = contents.data (); descend = descdata + note_size; /* Skip over the structure size. */ descdata += 4; while (descdata + KVE_PATH < descend) { ULONGEST structsize; structsize = bfd_get_32 (core_bfd, descdata + KF_STRUCTSIZE); if (structsize < KVE_PATH) error (_("malformed core note - vmmap entry too small")); if (bfd_get_32 (core_bfd, descdata + KF_TYPE) == KINFO_FILE_TYPE_VNODE && bfd_get_signed_32 (core_bfd, descdata + KF_FD) == fd) { char *path = (char *) descdata + KF_PATH; return gdb::unique_xmalloc_ptr (xstrdup (path)); } descdata += structsize; } return nullptr; } /* Helper function to read a struct timeval. */ static void fbsd_core_fetch_timeval (struct gdbarch *gdbarch, unsigned char *data, LONGEST &sec, ULONGEST &usec) { if (gdbarch_addr_bit (gdbarch) == 64) { sec = bfd_get_signed_64 (core_bfd, data); usec = bfd_get_64 (core_bfd, data + 8); } else if (bfd_get_arch (core_bfd) == bfd_arch_i386) { sec = bfd_get_signed_32 (core_bfd, data); usec = bfd_get_32 (core_bfd, data + 4); } else { sec = bfd_get_signed_64 (core_bfd, data); usec = bfd_get_32 (core_bfd, data + 8); } } /* Print out the contents of a signal set. */ static void fbsd_print_sigset (const char *descr, unsigned char *sigset) { printf_filtered ("%s: ", descr); for (int i = 0; i < SIG_WORDS; i++) printf_filtered ("%08x ", (unsigned int) bfd_get_32 (core_bfd, sigset + i * 4)); printf_filtered ("\n"); } /* Implement "info proc status" for a corefile. */ static void fbsd_core_info_proc_status (struct gdbarch *gdbarch) { const struct kinfo_proc_layout *kp; asection *section; unsigned char *descdata; int addr_bit, long_bit; size_t note_size; ULONGEST value; LONGEST sec; section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.proc"); if (section == NULL) { warning (_("unable to find process info in core file")); return; } addr_bit = gdbarch_addr_bit (gdbarch); if (addr_bit == 64) kp = &kinfo_proc_layout_64; else if (bfd_get_arch (core_bfd) == bfd_arch_i386) kp = &kinfo_proc_layout_i386; else kp = &kinfo_proc_layout_32; long_bit = gdbarch_long_bit (gdbarch); /* * Ensure that the note is large enough for all of the fields fetched * by this function. In particular, the note must contain the 32-bit * structure size, then it must be long enough to access the last * field used (ki_rusage_ch.ru_majflt) which is the size of a long. */ note_size = bfd_get_section_size (section); if (note_size < (4 + kp->ki_rusage_ch + kp->ru_majflt + long_bit / TARGET_CHAR_BIT)) error (_("malformed core note - too short")); gdb::def_vector contents (note_size); if (!bfd_get_section_contents (core_bfd, section, contents.data (), 0, note_size)) error (_("could not get core note contents")); descdata = contents.data (); /* Skip over the structure size. */ descdata += 4; /* Verify 'ki_layout' is 0. */ if (bfd_get_32 (core_bfd, descdata + kp->ki_layout) != 0) { warning (_("unsupported process information in core file")); return; } printf_filtered ("Name: %.19s\n", descdata + kp->ki_comm); printf_filtered ("Process ID: %s\n", pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_pid))); printf_filtered ("Parent process: %s\n", pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_ppid))); printf_filtered ("Process group: %s\n", pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_pgid))); printf_filtered ("Session id: %s\n", pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_sid))); /* FreeBSD 12.0 and later store a 64-bit dev_t at 'ki_tdev'. Older kernels store a 32-bit dev_t at 'ki_tdev_freebsd11'. In older kernels the 64-bit 'ki_tdev' field is in a reserved section of the structure that is cleared to zero. Assume that a zero value in ki_tdev indicates a core dump from an older kernel and use the value in 'ki_tdev_freebsd11' instead. */ value = bfd_get_64 (core_bfd, descdata + kp->ki_tdev); if (value == 0) value = bfd_get_32 (core_bfd, descdata + kp->ki_tdev_freebsd11); printf_filtered ("TTY: %s\n", pulongest (value)); printf_filtered ("TTY owner process group: %s\n", pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_tpgid))); printf_filtered ("User IDs (real, effective, saved): %s %s %s\n", pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_ruid)), pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_uid)), pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_svuid))); printf_filtered ("Group IDs (real, effective, saved): %s %s %s\n", pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_rgid)), pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_groups)), pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_svgid))); printf_filtered ("Groups: "); uint16_t ngroups = bfd_get_16 (core_bfd, descdata + kp->ki_ngroups); for (int i = 0; i < ngroups; i++) printf_filtered ("%s ", pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_groups + i * 4))); printf_filtered ("\n"); value = bfd_get (long_bit, core_bfd, descdata + kp->ki_rusage + kp->ru_minflt); printf_filtered ("Minor faults (no memory page): %s\n", pulongest (value)); value = bfd_get (long_bit, core_bfd, descdata + kp->ki_rusage_ch + kp->ru_minflt); printf_filtered ("Minor faults, children: %s\n", pulongest (value)); value = bfd_get (long_bit, core_bfd, descdata + kp->ki_rusage + kp->ru_majflt); printf_filtered ("Major faults (memory page faults): %s\n", pulongest (value)); value = bfd_get (long_bit, core_bfd, descdata + kp->ki_rusage_ch + kp->ru_majflt); printf_filtered ("Major faults, children: %s\n", pulongest (value)); fbsd_core_fetch_timeval (gdbarch, descdata + kp->ki_rusage + kp->ru_utime, sec, value); printf_filtered ("utime: %s.%06d\n", plongest (sec), (int) value); fbsd_core_fetch_timeval (gdbarch, descdata + kp->ki_rusage + kp->ru_stime, sec, value); printf_filtered ("stime: %s.%06d\n", plongest (sec), (int) value); fbsd_core_fetch_timeval (gdbarch, descdata + kp->ki_rusage_ch + kp->ru_utime, sec, value); printf_filtered ("utime, children: %s.%06d\n", plongest (sec), (int) value); fbsd_core_fetch_timeval (gdbarch, descdata + kp->ki_rusage_ch + kp->ru_stime, sec, value); printf_filtered ("stime, children: %s.%06d\n", plongest (sec), (int) value); printf_filtered ("'nice' value: %d\n", bfd_get_signed_8 (core_bfd, descdata + kp->ki_nice)); fbsd_core_fetch_timeval (gdbarch, descdata + kp->ki_start, sec, value); printf_filtered ("Start time: %s.%06d\n", plongest (sec), (int) value); printf_filtered ("Virtual memory size: %s kB\n", pulongest (bfd_get (addr_bit, core_bfd, descdata + kp->ki_size) / 1024)); printf_filtered ("Data size: %s pages\n", pulongest (bfd_get (addr_bit, core_bfd, descdata + kp->ki_dsize))); printf_filtered ("Stack size: %s pages\n", pulongest (bfd_get (addr_bit, core_bfd, descdata + kp->ki_ssize))); printf_filtered ("Text size: %s pages\n", pulongest (bfd_get (addr_bit, core_bfd, descdata + kp->ki_tsize))); printf_filtered ("Resident set size: %s pages\n", pulongest (bfd_get (addr_bit, core_bfd, descdata + kp->ki_rssize))); printf_filtered ("Maximum RSS: %s pages\n", pulongest (bfd_get (long_bit, core_bfd, descdata + kp->ki_rusage + kp->ru_maxrss))); fbsd_print_sigset ("Ignored Signals", descdata + kp->ki_sigignore); fbsd_print_sigset ("Caught Signals", descdata + kp->ki_sigcatch); } /* Implement the "core_info_proc" gdbarch method. */ static void fbsd_core_info_proc (struct gdbarch *gdbarch, const char *args, enum info_proc_what what) { bool do_cmdline = false; bool do_cwd = false; bool do_exe = false; bool do_mappings = false; bool do_status = false; int pid; switch (what) { case IP_MINIMAL: do_cmdline = true; do_cwd = true; do_exe = true; break; case IP_MAPPINGS: do_mappings = true; break; case IP_STATUS: case IP_STAT: do_status = true; break; case IP_CMDLINE: do_cmdline = true; break; case IP_EXE: do_exe = true; break; case IP_CWD: do_cwd = true; break; case IP_ALL: do_cmdline = true; do_cwd = true; do_exe = true; do_mappings = true; do_status = true; break; default: return; } pid = bfd_core_file_pid (core_bfd); if (pid != 0) printf_filtered (_("process %d\n"), pid); if (do_cmdline) { const char *cmdline; cmdline = bfd_core_file_failing_command (core_bfd); if (cmdline) printf_filtered ("cmdline = '%s'\n", cmdline); else warning (_("Command line unavailable")); } if (do_cwd) { gdb::unique_xmalloc_ptr cwd = fbsd_core_vnode_path (gdbarch, KINFO_FILE_FD_TYPE_CWD); if (cwd) printf_filtered ("cwd = '%s'\n", cwd.get ()); else warning (_("unable to read current working directory")); } if (do_exe) { gdb::unique_xmalloc_ptr exe = fbsd_core_vnode_path (gdbarch, KINFO_FILE_FD_TYPE_TEXT); if (exe) printf_filtered ("exe = '%s'\n", exe.get ()); else warning (_("unable to read executable path name")); } if (do_mappings) fbsd_core_info_proc_mappings (gdbarch); if (do_status) fbsd_core_info_proc_status (gdbarch); } /* Print descriptions of FreeBSD-specific AUXV entries to FILE. */ static void fbsd_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file, CORE_ADDR type, CORE_ADDR val) { const char *name; const char *description; enum auxv_format format; switch (type) { #define _TAGNAME(tag) #tag #define TAGNAME(tag) _TAGNAME(AT_##tag) #define TAG(tag, text, kind) \ case AT_FREEBSD_##tag: name = TAGNAME(tag); description = text; format = kind; break TAG (EXECPATH, _("Executable path"), AUXV_FORMAT_STR); TAG (CANARY, _("Canary for SSP"), AUXV_FORMAT_HEX); TAG (CANARYLEN, ("Length of the SSP canary"), AUXV_FORMAT_DEC); TAG (OSRELDATE, _("OSRELDATE"), AUXV_FORMAT_DEC); TAG (NCPUS, _("Number of CPUs"), AUXV_FORMAT_DEC); TAG (PAGESIZES, _("Pagesizes"), AUXV_FORMAT_HEX); TAG (PAGESIZESLEN, _("Number of pagesizes"), AUXV_FORMAT_DEC); TAG (TIMEKEEP, _("Pointer to timehands"), AUXV_FORMAT_HEX); TAG (STACKPROT, _("Initial stack protection"), AUXV_FORMAT_HEX); TAG (EHDRFLAGS, _("ELF header e_flags"), AUXV_FORMAT_HEX); TAG (HWCAP, _("Machine-dependent CPU capability hints"), AUXV_FORMAT_HEX); default: default_print_auxv_entry (gdbarch, file, type, val); return; } fprint_auxv_entry (file, name, description, format, type, val); } /* Implement the "get_siginfo_type" gdbarch method. */ static struct type * fbsd_get_siginfo_type (struct gdbarch *gdbarch) { struct fbsd_gdbarch_data *fbsd_gdbarch_data; struct type *int_type, *int32_type, *uint32_type, *long_type, *void_ptr_type; struct type *uid_type, *pid_type; struct type *sigval_type, *reason_type; struct type *siginfo_type; struct type *type; fbsd_gdbarch_data = get_fbsd_gdbarch_data (gdbarch); if (fbsd_gdbarch_data->siginfo_type != NULL) return fbsd_gdbarch_data->siginfo_type; int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 0, "int"); int32_type = arch_integer_type (gdbarch, 32, 0, "int32_t"); uint32_type = arch_integer_type (gdbarch, 32, 1, "uint32_t"); long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), 0, "long"); void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); /* union sigval */ sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); TYPE_NAME (sigval_type) = xstrdup ("sigval"); append_composite_type_field (sigval_type, "sival_int", int_type); append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type); /* __pid_t */ pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (int32_type) * TARGET_CHAR_BIT, "__pid_t"); TYPE_TARGET_TYPE (pid_type) = int32_type; TYPE_TARGET_STUB (pid_type) = 1; /* __uid_t */ uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (uint32_type) * TARGET_CHAR_BIT, "__uid_t"); TYPE_TARGET_TYPE (uid_type) = uint32_type; TYPE_TARGET_STUB (uid_type) = 1; /* _reason */ reason_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); /* _fault */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "si_trapno", int_type); append_composite_type_field (reason_type, "_fault", type); /* _timer */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "si_timerid", int_type); append_composite_type_field (type, "si_overrun", int_type); append_composite_type_field (reason_type, "_timer", type); /* _mesgq */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "si_mqd", int_type); append_composite_type_field (reason_type, "_mesgq", type); /* _poll */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "si_band", long_type); append_composite_type_field (reason_type, "_poll", type); /* __spare__ */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "__spare1__", long_type); append_composite_type_field (type, "__spare2__", init_vector_type (int_type, 7)); append_composite_type_field (reason_type, "__spare__", type); /* struct siginfo */ siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); TYPE_NAME (siginfo_type) = xstrdup ("siginfo"); append_composite_type_field (siginfo_type, "si_signo", int_type); append_composite_type_field (siginfo_type, "si_errno", int_type); append_composite_type_field (siginfo_type, "si_code", int_type); append_composite_type_field (siginfo_type, "si_pid", pid_type); append_composite_type_field (siginfo_type, "si_uid", uid_type); append_composite_type_field (siginfo_type, "si_status", int_type); append_composite_type_field (siginfo_type, "si_addr", void_ptr_type); append_composite_type_field (siginfo_type, "si_value", sigval_type); append_composite_type_field (siginfo_type, "_reason", reason_type); fbsd_gdbarch_data->siginfo_type = siginfo_type; return siginfo_type; } /* Implement the "get_syscall_number" gdbarch method. */ static LONGEST fbsd_get_syscall_number (struct gdbarch *gdbarch, thread_info *thread) { /* FreeBSD doesn't use gdbarch_get_syscall_number since FreeBSD native targets fetch the system call number from the 'pl_syscall_code' member of struct ptrace_lwpinfo in fbsd_wait. However, system call catching requires this function to be set. */ internal_error (__FILE__, __LINE__, _("fbsd_get_sycall_number called")); } /* To be called from GDB_OSABI_FREEBSD handlers. */ void fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { set_gdbarch_core_pid_to_str (gdbarch, fbsd_core_pid_to_str); set_gdbarch_core_thread_name (gdbarch, fbsd_core_thread_name); set_gdbarch_core_xfer_siginfo (gdbarch, fbsd_core_xfer_siginfo); set_gdbarch_make_corefile_notes (gdbarch, fbsd_make_corefile_notes); set_gdbarch_core_info_proc (gdbarch, fbsd_core_info_proc); set_gdbarch_print_auxv_entry (gdbarch, fbsd_print_auxv_entry); set_gdbarch_get_siginfo_type (gdbarch, fbsd_get_siginfo_type); /* `catch syscall' */ set_xml_syscall_file_name (gdbarch, "syscalls/freebsd.xml"); set_gdbarch_get_syscall_number (gdbarch, fbsd_get_syscall_number); } void _initialize_fbsd_tdep (void) { fbsd_gdbarch_data_handle = gdbarch_data_register_post_init (init_fbsd_gdbarch_data); }