The core note matches the format and layout of NT_ARM_VFP on Linux. Debuggers use the AT_HWCAP flags to determine how many VFP registers are actually used and their format. Reviewed by: mmel (earlier version w/o gcore) MFC after: 1 month Differential Revision: https://reviews.freebsd.org/D12293
931 lines
24 KiB
C
931 lines
24 KiB
C
/*-
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* Copyright (c) 2017 Dell EMC
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* Copyright (c) 2007 Sandvine Incorporated
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* Copyright (c) 1998 John D. Polstra
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/endian.h>
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#include <sys/param.h>
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#include <sys/procfs.h>
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#include <sys/ptrace.h>
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#include <sys/queue.h>
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#include <sys/linker_set.h>
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#include <sys/sbuf.h>
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#include <sys/sysctl.h>
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#include <sys/user.h>
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#include <sys/wait.h>
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#include <machine/elf.h>
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#include <vm/vm_param.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <assert.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <libutil.h>
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#include "extern.h"
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/*
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* Code for generating ELF core dumps.
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*/
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typedef void (*segment_callback)(vm_map_entry_t, void *);
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/* Closure for cb_put_phdr(). */
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struct phdr_closure {
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Elf_Phdr *phdr; /* Program header to fill in */
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Elf_Off offset; /* Offset of segment in core file */
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};
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/* Closure for cb_size_segment(). */
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struct sseg_closure {
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int count; /* Count of writable segments. */
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size_t size; /* Total size of all writable segments. */
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};
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#ifdef ELFCORE_COMPAT_32
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typedef struct fpreg32 elfcore_fpregset_t;
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typedef struct reg32 elfcore_gregset_t;
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typedef struct prpsinfo32 elfcore_prpsinfo_t;
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typedef struct prstatus32 elfcore_prstatus_t;
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typedef struct ptrace_lwpinfo32 elfcore_lwpinfo_t;
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static void elf_convert_gregset(elfcore_gregset_t *rd, struct reg *rs);
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static void elf_convert_fpregset(elfcore_fpregset_t *rd, struct fpreg *rs);
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static void elf_convert_lwpinfo(struct ptrace_lwpinfo32 *pld,
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struct ptrace_lwpinfo *pls);
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#else
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typedef fpregset_t elfcore_fpregset_t;
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typedef gregset_t elfcore_gregset_t;
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typedef prpsinfo_t elfcore_prpsinfo_t;
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typedef prstatus_t elfcore_prstatus_t;
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typedef struct ptrace_lwpinfo elfcore_lwpinfo_t;
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#define elf_convert_gregset(d,s) *d = *s
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#define elf_convert_fpregset(d,s) *d = *s
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#define elf_convert_lwpinfo(d,s) *d = *s
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#endif
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typedef void* (*notefunc_t)(void *, size_t *);
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static void cb_put_phdr(vm_map_entry_t, void *);
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static void cb_size_segment(vm_map_entry_t, void *);
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static void each_dumpable_segment(vm_map_entry_t, segment_callback,
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void *closure);
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static void elf_detach(void); /* atexit() handler. */
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static void *elf_note_fpregset(void *, size_t *);
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static void *elf_note_prpsinfo(void *, size_t *);
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static void *elf_note_prstatus(void *, size_t *);
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static void *elf_note_thrmisc(void *, size_t *);
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static void *elf_note_ptlwpinfo(void *, size_t *);
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#if defined(__arm__)
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static void *elf_note_arm_vfp(void *, size_t *);
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#endif
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#if defined(__i386__) || defined(__amd64__)
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static void *elf_note_x86_xstate(void *, size_t *);
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#endif
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#if defined(__powerpc__)
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static void *elf_note_powerpc_vmx(void *, size_t *);
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#endif
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static void *elf_note_procstat_auxv(void *, size_t *);
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static void *elf_note_procstat_files(void *, size_t *);
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static void *elf_note_procstat_groups(void *, size_t *);
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static void *elf_note_procstat_osrel(void *, size_t *);
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static void *elf_note_procstat_proc(void *, size_t *);
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static void *elf_note_procstat_psstrings(void *, size_t *);
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static void *elf_note_procstat_rlimit(void *, size_t *);
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static void *elf_note_procstat_umask(void *, size_t *);
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static void *elf_note_procstat_vmmap(void *, size_t *);
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static void elf_puthdr(int, pid_t, vm_map_entry_t, void *, size_t, size_t,
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size_t, int);
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static void elf_putnote(int, notefunc_t, void *, struct sbuf *);
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static void elf_putnotes(pid_t, struct sbuf *, size_t *);
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static void freemap(vm_map_entry_t);
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static vm_map_entry_t readmap(pid_t);
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static void *procstat_sysctl(void *, int, size_t, size_t *sizep);
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static pid_t g_pid; /* Pid being dumped, global for elf_detach */
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static int g_status; /* proc status after ptrace attach */
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static int
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elf_ident(int efd, pid_t pid __unused, char *binfile __unused)
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{
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Elf_Ehdr hdr;
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int cnt;
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uint16_t machine;
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cnt = read(efd, &hdr, sizeof(hdr));
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if (cnt != sizeof(hdr))
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return (0);
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if (!IS_ELF(hdr))
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return (0);
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switch (hdr.e_ident[EI_DATA]) {
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case ELFDATA2LSB:
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machine = le16toh(hdr.e_machine);
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break;
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case ELFDATA2MSB:
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machine = be16toh(hdr.e_machine);
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break;
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default:
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return (0);
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}
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if (!ELF_MACHINE_OK(machine))
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return (0);
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/* Looks good. */
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return (1);
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}
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static void
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elf_detach(void)
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{
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int sig;
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if (g_pid != 0) {
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/*
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* Forward any pending signals. SIGSTOP is generated by ptrace
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* itself, so ignore it.
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*/
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sig = WIFSTOPPED(g_status) ? WSTOPSIG(g_status) : 0;
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if (sig == SIGSTOP)
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sig = 0;
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ptrace(PT_DETACH, g_pid, (caddr_t)1, sig);
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}
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}
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/*
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* Write an ELF coredump for the given pid to the given fd.
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*/
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static void
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elf_coredump(int efd, int fd, pid_t pid)
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{
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vm_map_entry_t map;
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struct sseg_closure seginfo;
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struct sbuf *sb;
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void *hdr;
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size_t hdrsize, notesz, segoff;
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ssize_t n, old_len;
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Elf_Phdr *php;
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int i;
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/* Attach to process to dump. */
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g_pid = pid;
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if (atexit(elf_detach) != 0)
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err(1, "atexit");
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errno = 0;
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ptrace(PT_ATTACH, pid, NULL, 0);
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if (errno)
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err(1, "PT_ATTACH");
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if (waitpid(pid, &g_status, 0) == -1)
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err(1, "waitpid");
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/* Get the program's memory map. */
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map = readmap(pid);
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/* Size the program segments. */
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seginfo.count = 0;
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seginfo.size = 0;
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each_dumpable_segment(map, cb_size_segment, &seginfo);
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/*
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* Build the header and the notes using sbuf and write to the file.
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*/
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sb = sbuf_new_auto();
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hdrsize = sizeof(Elf_Ehdr) + sizeof(Elf_Phdr) * (1 + seginfo.count);
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if (seginfo.count + 1 >= PN_XNUM)
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hdrsize += sizeof(Elf_Shdr);
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/* Start header + notes section. */
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sbuf_start_section(sb, NULL);
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/* Make empty header subsection. */
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sbuf_start_section(sb, &old_len);
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sbuf_putc(sb, 0);
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sbuf_end_section(sb, old_len, hdrsize, 0);
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/* Put notes. */
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elf_putnotes(pid, sb, ¬esz);
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/* Align up to a page boundary for the program segments. */
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sbuf_end_section(sb, -1, PAGE_SIZE, 0);
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if (sbuf_finish(sb) != 0)
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err(1, "sbuf_finish");
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hdr = sbuf_data(sb);
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segoff = sbuf_len(sb);
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/* Fill in the header. */
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elf_puthdr(efd, pid, map, hdr, hdrsize, notesz, segoff, seginfo.count);
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n = write(fd, hdr, segoff);
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if (n == -1)
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err(1, "write");
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if (n < segoff)
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errx(1, "short write");
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/* Write the contents of all of the writable segments. */
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php = (Elf_Phdr *)((char *)hdr + sizeof(Elf_Ehdr)) + 1;
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for (i = 0; i < seginfo.count; i++) {
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struct ptrace_io_desc iorequest;
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uintmax_t nleft = php->p_filesz;
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iorequest.piod_op = PIOD_READ_D;
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iorequest.piod_offs = (caddr_t)(uintptr_t)php->p_vaddr;
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while (nleft > 0) {
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char buf[8*1024];
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size_t nwant;
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ssize_t ngot;
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if (nleft > sizeof(buf))
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nwant = sizeof buf;
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else
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nwant = nleft;
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iorequest.piod_addr = buf;
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iorequest.piod_len = nwant;
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ptrace(PT_IO, pid, (caddr_t)&iorequest, 0);
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ngot = iorequest.piod_len;
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if ((size_t)ngot < nwant)
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errx(1, "short read wanted %zu, got %zd",
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nwant, ngot);
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ngot = write(fd, buf, nwant);
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if (ngot == -1)
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err(1, "write of segment %d failed", i);
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if ((size_t)ngot != nwant)
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errx(1, "short write");
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nleft -= nwant;
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iorequest.piod_offs += ngot;
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}
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php++;
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}
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sbuf_delete(sb);
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freemap(map);
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}
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/*
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* A callback for each_dumpable_segment() to write out the segment's
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* program header entry.
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*/
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static void
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cb_put_phdr(vm_map_entry_t entry, void *closure)
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{
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struct phdr_closure *phc = (struct phdr_closure *)closure;
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Elf_Phdr *phdr = phc->phdr;
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phc->offset = round_page(phc->offset);
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phdr->p_type = PT_LOAD;
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phdr->p_offset = phc->offset;
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phdr->p_vaddr = entry->start;
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phdr->p_paddr = 0;
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phdr->p_filesz = phdr->p_memsz = entry->end - entry->start;
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phdr->p_align = PAGE_SIZE;
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phdr->p_flags = 0;
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if (entry->protection & VM_PROT_READ)
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phdr->p_flags |= PF_R;
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if (entry->protection & VM_PROT_WRITE)
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phdr->p_flags |= PF_W;
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if (entry->protection & VM_PROT_EXECUTE)
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phdr->p_flags |= PF_X;
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phc->offset += phdr->p_filesz;
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phc->phdr++;
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}
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/*
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* A callback for each_dumpable_segment() to gather information about
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* the number of segments and their total size.
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*/
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static void
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cb_size_segment(vm_map_entry_t entry, void *closure)
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{
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struct sseg_closure *ssc = (struct sseg_closure *)closure;
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ssc->count++;
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ssc->size += entry->end - entry->start;
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}
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/*
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* For each segment in the given memory map, call the given function
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* with a pointer to the map entry and some arbitrary caller-supplied
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* data.
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*/
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static void
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each_dumpable_segment(vm_map_entry_t map, segment_callback func, void *closure)
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{
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vm_map_entry_t entry;
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for (entry = map; entry != NULL; entry = entry->next)
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(*func)(entry, closure);
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}
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static void
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elf_putnotes(pid_t pid, struct sbuf *sb, size_t *sizep)
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{
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lwpid_t *tids;
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size_t threads, old_len;
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ssize_t size;
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int i;
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errno = 0;
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threads = ptrace(PT_GETNUMLWPS, pid, NULL, 0);
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if (errno)
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err(1, "PT_GETNUMLWPS");
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tids = malloc(threads * sizeof(*tids));
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if (tids == NULL)
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errx(1, "out of memory");
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errno = 0;
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ptrace(PT_GETLWPLIST, pid, (void *)tids, threads);
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if (errno)
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err(1, "PT_GETLWPLIST");
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sbuf_start_section(sb, &old_len);
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elf_putnote(NT_PRPSINFO, elf_note_prpsinfo, &pid, sb);
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for (i = 0; i < threads; ++i) {
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elf_putnote(NT_PRSTATUS, elf_note_prstatus, tids + i, sb);
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elf_putnote(NT_FPREGSET, elf_note_fpregset, tids + i, sb);
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elf_putnote(NT_THRMISC, elf_note_thrmisc, tids + i, sb);
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elf_putnote(NT_PTLWPINFO, elf_note_ptlwpinfo, tids + i, sb);
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#if defined(__arm__)
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elf_putnote(NT_ARM_VFP, elf_note_arm_vfp, tids + i, sb);
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#endif
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#if defined(__i386__) || defined(__amd64__)
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elf_putnote(NT_X86_XSTATE, elf_note_x86_xstate, tids + i, sb);
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#endif
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#if defined(__powerpc__)
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elf_putnote(NT_PPC_VMX, elf_note_powerpc_vmx, tids + i, sb);
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#endif
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}
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#ifndef ELFCORE_COMPAT_32
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elf_putnote(NT_PROCSTAT_PROC, elf_note_procstat_proc, &pid, sb);
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elf_putnote(NT_PROCSTAT_FILES, elf_note_procstat_files, &pid, sb);
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elf_putnote(NT_PROCSTAT_VMMAP, elf_note_procstat_vmmap, &pid, sb);
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elf_putnote(NT_PROCSTAT_GROUPS, elf_note_procstat_groups, &pid, sb);
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elf_putnote(NT_PROCSTAT_UMASK, elf_note_procstat_umask, &pid, sb);
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elf_putnote(NT_PROCSTAT_RLIMIT, elf_note_procstat_rlimit, &pid, sb);
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elf_putnote(NT_PROCSTAT_OSREL, elf_note_procstat_osrel, &pid, sb);
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elf_putnote(NT_PROCSTAT_PSSTRINGS, elf_note_procstat_psstrings, &pid,
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sb);
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elf_putnote(NT_PROCSTAT_AUXV, elf_note_procstat_auxv, &pid, sb);
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#endif
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|
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size = sbuf_end_section(sb, old_len, 1, 0);
|
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if (size == -1)
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err(1, "sbuf_end_section");
|
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free(tids);
|
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*sizep = size;
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}
|
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|
|
/*
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* Emit one note section to sbuf.
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*/
|
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static void
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elf_putnote(int type, notefunc_t notefunc, void *arg, struct sbuf *sb)
|
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{
|
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Elf_Note note;
|
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size_t descsz;
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ssize_t old_len;
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void *desc;
|
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|
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desc = notefunc(arg, &descsz);
|
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note.n_namesz = 8; /* strlen("FreeBSD") + 1 */
|
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note.n_descsz = descsz;
|
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note.n_type = type;
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|
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sbuf_bcat(sb, ¬e, sizeof(note));
|
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sbuf_start_section(sb, &old_len);
|
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sbuf_bcat(sb, "FreeBSD", note.n_namesz);
|
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sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0);
|
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if (descsz == 0)
|
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return;
|
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sbuf_start_section(sb, &old_len);
|
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sbuf_bcat(sb, desc, descsz);
|
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sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0);
|
|
free(desc);
|
|
}
|
|
|
|
/*
|
|
* Generate the ELF coredump header.
|
|
*/
|
|
static void
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elf_puthdr(int efd, pid_t pid, vm_map_entry_t map, void *hdr, size_t hdrsize,
|
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size_t notesz, size_t segoff, int numsegs)
|
|
{
|
|
Elf_Ehdr *ehdr, binhdr;
|
|
Elf_Phdr *phdr;
|
|
Elf_Shdr *shdr;
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|
struct phdr_closure phc;
|
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ssize_t cnt;
|
|
|
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cnt = read(efd, &binhdr, sizeof(binhdr));
|
|
if (cnt < 0)
|
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err(1, "Failed to re-read ELF header");
|
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else if (cnt != sizeof(binhdr))
|
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errx(1, "Failed to re-read ELF header");
|
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|
|
ehdr = (Elf_Ehdr *)hdr;
|
|
|
|
ehdr->e_ident[EI_MAG0] = ELFMAG0;
|
|
ehdr->e_ident[EI_MAG1] = ELFMAG1;
|
|
ehdr->e_ident[EI_MAG2] = ELFMAG2;
|
|
ehdr->e_ident[EI_MAG3] = ELFMAG3;
|
|
ehdr->e_ident[EI_CLASS] = ELF_CLASS;
|
|
ehdr->e_ident[EI_DATA] = ELF_DATA;
|
|
ehdr->e_ident[EI_VERSION] = EV_CURRENT;
|
|
ehdr->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
|
|
ehdr->e_ident[EI_ABIVERSION] = 0;
|
|
ehdr->e_ident[EI_PAD] = 0;
|
|
ehdr->e_type = ET_CORE;
|
|
ehdr->e_machine = binhdr.e_machine;
|
|
ehdr->e_version = EV_CURRENT;
|
|
ehdr->e_entry = 0;
|
|
ehdr->e_phoff = sizeof(Elf_Ehdr);
|
|
ehdr->e_flags = binhdr.e_flags;
|
|
ehdr->e_ehsize = sizeof(Elf_Ehdr);
|
|
ehdr->e_phentsize = sizeof(Elf_Phdr);
|
|
ehdr->e_shentsize = sizeof(Elf_Shdr);
|
|
ehdr->e_shstrndx = SHN_UNDEF;
|
|
if (numsegs + 1 < PN_XNUM) {
|
|
ehdr->e_phnum = numsegs + 1;
|
|
ehdr->e_shnum = 0;
|
|
} else {
|
|
ehdr->e_phnum = PN_XNUM;
|
|
ehdr->e_shnum = 1;
|
|
|
|
ehdr->e_shoff = ehdr->e_phoff +
|
|
(numsegs + 1) * ehdr->e_phentsize;
|
|
|
|
shdr = (Elf_Shdr *)((char *)hdr + ehdr->e_shoff);
|
|
memset(shdr, 0, sizeof(*shdr));
|
|
/*
|
|
* A special first section is used to hold large segment and
|
|
* section counts. This was proposed by Sun Microsystems in
|
|
* Solaris and has been adopted by Linux; the standard ELF
|
|
* tools are already familiar with the technique.
|
|
*
|
|
* See table 7-7 of the Solaris "Linker and Libraries Guide"
|
|
* (or 12-7 depending on the version of the document) for more
|
|
* details.
|
|
*/
|
|
shdr->sh_type = SHT_NULL;
|
|
shdr->sh_size = ehdr->e_shnum;
|
|
shdr->sh_link = ehdr->e_shstrndx;
|
|
shdr->sh_info = numsegs + 1;
|
|
}
|
|
|
|
/*
|
|
* Fill in the program header entries.
|
|
*/
|
|
phdr = (Elf_Phdr *)((char *)hdr + ehdr->e_phoff);
|
|
|
|
/* The note segement. */
|
|
phdr->p_type = PT_NOTE;
|
|
phdr->p_offset = hdrsize;
|
|
phdr->p_vaddr = 0;
|
|
phdr->p_paddr = 0;
|
|
phdr->p_filesz = notesz;
|
|
phdr->p_memsz = 0;
|
|
phdr->p_flags = PF_R;
|
|
phdr->p_align = sizeof(Elf32_Size);
|
|
phdr++;
|
|
|
|
/* All the writable segments from the program. */
|
|
phc.phdr = phdr;
|
|
phc.offset = segoff;
|
|
each_dumpable_segment(map, cb_put_phdr, &phc);
|
|
}
|
|
|
|
/*
|
|
* Free the memory map.
|
|
*/
|
|
static void
|
|
freemap(vm_map_entry_t map)
|
|
{
|
|
|
|
while (map != NULL) {
|
|
vm_map_entry_t next = map->next;
|
|
free(map);
|
|
map = next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Read the process's memory map using kinfo_getvmmap(), and return a list of
|
|
* VM map entries. Only the non-device read/writable segments are
|
|
* returned. The map entries in the list aren't fully filled in; only
|
|
* the items we need are present.
|
|
*/
|
|
static vm_map_entry_t
|
|
readmap(pid_t pid)
|
|
{
|
|
vm_map_entry_t ent, *linkp, map;
|
|
struct kinfo_vmentry *vmentl, *kve;
|
|
int i, nitems;
|
|
|
|
vmentl = kinfo_getvmmap(pid, &nitems);
|
|
if (vmentl == NULL)
|
|
err(1, "cannot retrieve mappings for %u process", pid);
|
|
|
|
map = NULL;
|
|
linkp = ↦
|
|
for (i = 0; i < nitems; i++) {
|
|
kve = &vmentl[i];
|
|
|
|
/*
|
|
* Ignore 'malformed' segments or ones representing memory
|
|
* mapping with MAP_NOCORE on.
|
|
* If the 'full' support is disabled, just dump the most
|
|
* meaningful data segments.
|
|
*/
|
|
if ((kve->kve_protection & KVME_PROT_READ) == 0 ||
|
|
(kve->kve_flags & KVME_FLAG_NOCOREDUMP) != 0 ||
|
|
kve->kve_type == KVME_TYPE_DEAD ||
|
|
kve->kve_type == KVME_TYPE_UNKNOWN ||
|
|
((pflags & PFLAGS_FULL) == 0 &&
|
|
kve->kve_type != KVME_TYPE_DEFAULT &&
|
|
kve->kve_type != KVME_TYPE_VNODE &&
|
|
kve->kve_type != KVME_TYPE_SWAP &&
|
|
kve->kve_type != KVME_TYPE_PHYS))
|
|
continue;
|
|
|
|
ent = calloc(1, sizeof(*ent));
|
|
if (ent == NULL)
|
|
errx(1, "out of memory");
|
|
ent->start = (vm_offset_t)kve->kve_start;
|
|
ent->end = (vm_offset_t)kve->kve_end;
|
|
ent->protection = VM_PROT_READ | VM_PROT_WRITE;
|
|
if ((kve->kve_protection & KVME_PROT_EXEC) != 0)
|
|
ent->protection |= VM_PROT_EXECUTE;
|
|
|
|
*linkp = ent;
|
|
linkp = &ent->next;
|
|
}
|
|
free(vmentl);
|
|
return (map);
|
|
}
|
|
|
|
/*
|
|
* Miscellaneous note out functions.
|
|
*/
|
|
|
|
static void *
|
|
elf_note_prpsinfo(void *arg, size_t *sizep)
|
|
{
|
|
char *cp, *end;
|
|
pid_t pid;
|
|
elfcore_prpsinfo_t *psinfo;
|
|
struct kinfo_proc kip;
|
|
size_t len;
|
|
int name[4];
|
|
|
|
pid = *(pid_t *)arg;
|
|
psinfo = calloc(1, sizeof(*psinfo));
|
|
if (psinfo == NULL)
|
|
errx(1, "out of memory");
|
|
psinfo->pr_version = PRPSINFO_VERSION;
|
|
psinfo->pr_psinfosz = sizeof(*psinfo);
|
|
|
|
name[0] = CTL_KERN;
|
|
name[1] = KERN_PROC;
|
|
name[2] = KERN_PROC_PID;
|
|
name[3] = pid;
|
|
len = sizeof(kip);
|
|
if (sysctl(name, 4, &kip, &len, NULL, 0) == -1)
|
|
err(1, "kern.proc.pid.%u", pid);
|
|
if (kip.ki_pid != pid)
|
|
err(1, "kern.proc.pid.%u", pid);
|
|
strlcpy(psinfo->pr_fname, kip.ki_comm, sizeof(psinfo->pr_fname));
|
|
name[2] = KERN_PROC_ARGS;
|
|
len = sizeof(psinfo->pr_psargs) - 1;
|
|
if (sysctl(name, 4, psinfo->pr_psargs, &len, NULL, 0) == 0 && len > 0) {
|
|
cp = psinfo->pr_psargs;
|
|
end = cp + len - 1;
|
|
for (;;) {
|
|
cp = memchr(cp, '\0', end - cp);
|
|
if (cp == NULL)
|
|
break;
|
|
*cp = ' ';
|
|
}
|
|
} else
|
|
strlcpy(psinfo->pr_psargs, kip.ki_comm,
|
|
sizeof(psinfo->pr_psargs));
|
|
psinfo->pr_pid = pid;
|
|
|
|
*sizep = sizeof(*psinfo);
|
|
return (psinfo);
|
|
}
|
|
|
|
static void *
|
|
elf_note_prstatus(void *arg, size_t *sizep)
|
|
{
|
|
lwpid_t tid;
|
|
elfcore_prstatus_t *status;
|
|
struct reg greg;
|
|
|
|
tid = *(lwpid_t *)arg;
|
|
status = calloc(1, sizeof(*status));
|
|
if (status == NULL)
|
|
errx(1, "out of memory");
|
|
status->pr_version = PRSTATUS_VERSION;
|
|
status->pr_statussz = sizeof(*status);
|
|
status->pr_gregsetsz = sizeof(elfcore_gregset_t);
|
|
status->pr_fpregsetsz = sizeof(elfcore_fpregset_t);
|
|
status->pr_osreldate = __FreeBSD_version;
|
|
status->pr_pid = tid;
|
|
ptrace(PT_GETREGS, tid, (void *)&greg, 0);
|
|
elf_convert_gregset(&status->pr_reg, &greg);
|
|
|
|
*sizep = sizeof(*status);
|
|
return (status);
|
|
}
|
|
|
|
static void *
|
|
elf_note_fpregset(void *arg, size_t *sizep)
|
|
{
|
|
lwpid_t tid;
|
|
elfcore_fpregset_t *fpregset;
|
|
fpregset_t fpreg;
|
|
|
|
tid = *(lwpid_t *)arg;
|
|
fpregset = calloc(1, sizeof(*fpregset));
|
|
if (fpregset == NULL)
|
|
errx(1, "out of memory");
|
|
ptrace(PT_GETFPREGS, tid, (void *)&fpreg, 0);
|
|
elf_convert_fpregset(fpregset, &fpreg);
|
|
|
|
*sizep = sizeof(*fpregset);
|
|
return (fpregset);
|
|
}
|
|
|
|
static void *
|
|
elf_note_thrmisc(void *arg, size_t *sizep)
|
|
{
|
|
lwpid_t tid;
|
|
struct ptrace_lwpinfo lwpinfo;
|
|
thrmisc_t *thrmisc;
|
|
|
|
tid = *(lwpid_t *)arg;
|
|
thrmisc = calloc(1, sizeof(*thrmisc));
|
|
if (thrmisc == NULL)
|
|
errx(1, "out of memory");
|
|
ptrace(PT_LWPINFO, tid, (void *)&lwpinfo,
|
|
sizeof(lwpinfo));
|
|
memset(&thrmisc->_pad, 0, sizeof(thrmisc->_pad));
|
|
strcpy(thrmisc->pr_tname, lwpinfo.pl_tdname);
|
|
|
|
*sizep = sizeof(*thrmisc);
|
|
return (thrmisc);
|
|
}
|
|
|
|
static void *
|
|
elf_note_ptlwpinfo(void *arg, size_t *sizep)
|
|
{
|
|
lwpid_t tid;
|
|
elfcore_lwpinfo_t *elf_info;
|
|
struct ptrace_lwpinfo lwpinfo;
|
|
void *p;
|
|
|
|
tid = *(lwpid_t *)arg;
|
|
p = calloc(1, sizeof(int) + sizeof(elfcore_lwpinfo_t));
|
|
if (p == NULL)
|
|
errx(1, "out of memory");
|
|
*(int *)p = sizeof(elfcore_lwpinfo_t);
|
|
elf_info = (void *)((int *)p + 1);
|
|
ptrace(PT_LWPINFO, tid, (void *)&lwpinfo, sizeof(lwpinfo));
|
|
elf_convert_lwpinfo(elf_info, &lwpinfo);
|
|
|
|
*sizep = sizeof(int) + sizeof(struct ptrace_lwpinfo);
|
|
return (p);
|
|
}
|
|
|
|
#if defined(__arm__)
|
|
static void *
|
|
elf_note_arm_vfp(void *arg, size_t *sizep)
|
|
{
|
|
lwpid_t tid;
|
|
struct vfpreg *vfp;
|
|
static bool has_vfp = true;
|
|
struct vfpreg info;
|
|
|
|
tid = *(lwpid_t *)arg;
|
|
if (has_vfp) {
|
|
if (ptrace(PT_GETVFPREGS, tid, (void *)&info, 0) != 0)
|
|
has_vfp = false;
|
|
}
|
|
if (!has_vfp) {
|
|
*sizep = 0;
|
|
return (NULL);
|
|
}
|
|
vfp = calloc(1, sizeof(*vfp));
|
|
memcpy(vfp, &info, sizeof(*vfp));
|
|
*sizep = sizeof(*vfp);
|
|
return (vfp);
|
|
}
|
|
#endif
|
|
|
|
#if defined(__i386__) || defined(__amd64__)
|
|
static void *
|
|
elf_note_x86_xstate(void *arg, size_t *sizep)
|
|
{
|
|
lwpid_t tid;
|
|
char *xstate;
|
|
static bool xsave_checked = false;
|
|
static struct ptrace_xstate_info info;
|
|
|
|
tid = *(lwpid_t *)arg;
|
|
if (!xsave_checked) {
|
|
if (ptrace(PT_GETXSTATE_INFO, tid, (void *)&info,
|
|
sizeof(info)) != 0)
|
|
info.xsave_len = 0;
|
|
xsave_checked = true;
|
|
}
|
|
if (info.xsave_len == 0) {
|
|
*sizep = 0;
|
|
return (NULL);
|
|
}
|
|
xstate = calloc(1, info.xsave_len);
|
|
ptrace(PT_GETXSTATE, tid, xstate, 0);
|
|
*(uint64_t *)(xstate + X86_XSTATE_XCR0_OFFSET) = info.xsave_mask;
|
|
*sizep = info.xsave_len;
|
|
return (xstate);
|
|
}
|
|
#endif
|
|
|
|
#if defined(__powerpc__)
|
|
static void *
|
|
elf_note_powerpc_vmx(void *arg, size_t *sizep)
|
|
{
|
|
lwpid_t tid;
|
|
struct vmxreg *vmx;
|
|
static bool has_vmx = true;
|
|
struct vmxreg info;
|
|
|
|
tid = *(lwpid_t *)arg;
|
|
if (has_vmx) {
|
|
if (ptrace(PT_GETVRREGS, tid, (void *)&info,
|
|
sizeof(info)) != 0)
|
|
has_vmx = false;
|
|
}
|
|
if (!has_vmx) {
|
|
*sizep = 0;
|
|
return (NULL);
|
|
}
|
|
vmx = calloc(1, sizeof(*vmx));
|
|
memcpy(vmx, &info, sizeof(*vmx));
|
|
*sizep = sizeof(*vmx);
|
|
return (vmx);
|
|
}
|
|
#endif
|
|
|
|
static void *
|
|
procstat_sysctl(void *arg, int what, size_t structsz, size_t *sizep)
|
|
{
|
|
size_t len;
|
|
pid_t pid;
|
|
int name[4], structsize;
|
|
void *buf, *p;
|
|
|
|
pid = *(pid_t *)arg;
|
|
structsize = structsz;
|
|
name[0] = CTL_KERN;
|
|
name[1] = KERN_PROC;
|
|
name[2] = what;
|
|
name[3] = pid;
|
|
len = 0;
|
|
if (sysctl(name, 4, NULL, &len, NULL, 0) == -1)
|
|
err(1, "kern.proc.%d.%u", what, pid);
|
|
buf = calloc(1, sizeof(structsize) + len * 4 / 3);
|
|
if (buf == NULL)
|
|
errx(1, "out of memory");
|
|
bcopy(&structsize, buf, sizeof(structsize));
|
|
p = (char *)buf + sizeof(structsize);
|
|
if (sysctl(name, 4, p, &len, NULL, 0) == -1)
|
|
err(1, "kern.proc.%d.%u", what, pid);
|
|
|
|
*sizep = sizeof(structsize) + len;
|
|
return (buf);
|
|
}
|
|
|
|
static void *
|
|
elf_note_procstat_proc(void *arg, size_t *sizep)
|
|
{
|
|
|
|
return (procstat_sysctl(arg, KERN_PROC_PID | KERN_PROC_INC_THREAD,
|
|
sizeof(struct kinfo_proc), sizep));
|
|
}
|
|
|
|
static void *
|
|
elf_note_procstat_files(void *arg, size_t *sizep)
|
|
{
|
|
|
|
return (procstat_sysctl(arg, KERN_PROC_FILEDESC,
|
|
sizeof(struct kinfo_file), sizep));
|
|
}
|
|
|
|
static void *
|
|
elf_note_procstat_vmmap(void *arg, size_t *sizep)
|
|
{
|
|
|
|
return (procstat_sysctl(arg, KERN_PROC_VMMAP,
|
|
sizeof(struct kinfo_vmentry), sizep));
|
|
}
|
|
|
|
static void *
|
|
elf_note_procstat_groups(void *arg, size_t *sizep)
|
|
{
|
|
|
|
return (procstat_sysctl(arg, KERN_PROC_GROUPS, sizeof(gid_t), sizep));
|
|
}
|
|
|
|
static void *
|
|
elf_note_procstat_umask(void *arg, size_t *sizep)
|
|
{
|
|
|
|
return (procstat_sysctl(arg, KERN_PROC_UMASK, sizeof(u_short), sizep));
|
|
}
|
|
|
|
static void *
|
|
elf_note_procstat_osrel(void *arg, size_t *sizep)
|
|
{
|
|
|
|
return (procstat_sysctl(arg, KERN_PROC_OSREL, sizeof(int), sizep));
|
|
}
|
|
|
|
static void *
|
|
elf_note_procstat_psstrings(void *arg, size_t *sizep)
|
|
{
|
|
|
|
return (procstat_sysctl(arg, KERN_PROC_PS_STRINGS,
|
|
sizeof(vm_offset_t), sizep));
|
|
}
|
|
|
|
static void *
|
|
elf_note_procstat_auxv(void *arg, size_t *sizep)
|
|
{
|
|
|
|
return (procstat_sysctl(arg, KERN_PROC_AUXV,
|
|
sizeof(Elf_Auxinfo), sizep));
|
|
}
|
|
|
|
static void *
|
|
elf_note_procstat_rlimit(void *arg, size_t *sizep)
|
|
{
|
|
pid_t pid;
|
|
size_t len;
|
|
int i, name[5], structsize;
|
|
void *buf, *p;
|
|
|
|
pid = *(pid_t *)arg;
|
|
structsize = sizeof(struct rlimit) * RLIM_NLIMITS;
|
|
buf = calloc(1, sizeof(structsize) + structsize);
|
|
if (buf == NULL)
|
|
errx(1, "out of memory");
|
|
bcopy(&structsize, buf, sizeof(structsize));
|
|
p = (char *)buf + sizeof(structsize);
|
|
name[0] = CTL_KERN;
|
|
name[1] = KERN_PROC;
|
|
name[2] = KERN_PROC_RLIMIT;
|
|
name[3] = pid;
|
|
len = sizeof(struct rlimit);
|
|
for (i = 0; i < RLIM_NLIMITS; i++) {
|
|
name[4] = i;
|
|
if (sysctl(name, 5, p, &len, NULL, 0) == -1)
|
|
err(1, "kern.proc.rlimit.%u", pid);
|
|
if (len != sizeof(struct rlimit))
|
|
errx(1, "kern.proc.rlimit.%u: short read", pid);
|
|
p += len;
|
|
}
|
|
|
|
*sizep = sizeof(structsize) + structsize;
|
|
return (buf);
|
|
}
|
|
|
|
struct dumpers __elfN(dump) = { elf_ident, elf_coredump };
|
|
TEXT_SET(dumpset, __elfN(dump));
|