Sync gcore(1) with the recent changes in kernel code aimed at adding
procstat notes to a process core file. Suggested by: jhb MFC after: 1 month
This commit is contained in:
Mikolaj Golub
parent
948baa409b
commit
7fe6d16ef9
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=249687
@ -4,7 +4,7 @@
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PROG= gcore
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SRCS= elfcore.c gcore.c
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DPADD= ${LIBUTIL}
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LDADD= -lutil
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LDADD= -lsbuf -lutil
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WARNS?= 1
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@ -33,6 +33,7 @@ __FBSDID("$FreeBSD$");
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#include <sys/ptrace.h>
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#include <sys/queue.h>
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#include <sys/linker_set.h>
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#include <sys/sbuf.h>
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#include <sys/sysctl.h>
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#include <sys/user.h>
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#include <sys/wait.h>
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@ -41,6 +42,7 @@ __FBSDID("$FreeBSD$");
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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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@ -71,16 +73,33 @@ struct sseg_closure {
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size_t size; /* Total size of all writable segments. */
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};
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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_writable_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_puthdr(pid_t, vm_map_entry_t, void *, size_t *, int numsegs);
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static void elf_putnote(void *dst, size_t *off, const char *name, int type,
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const void *desc, size_t descsz);
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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_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(pid_t, vm_map_entry_t, void *, size_t, size_t, size_t,
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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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@ -114,8 +133,10 @@ elf_coredump(int efd __unused, 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;
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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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@ -139,27 +160,32 @@ elf_coredump(int efd __unused, int fd, pid_t pid)
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each_writable_segment(map, cb_size_segment, &seginfo);
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/*
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* Calculate the size of the core file header area by making
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* a dry run of generating it. Nothing is written, but the
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* size is calculated.
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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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hdrsize = 0;
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elf_puthdr(pid, map, NULL, &hdrsize, seginfo.count);
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/*
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* Allocate memory for building the header, fill it up,
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* and write it out.
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*/
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if ((hdr = calloc(1, hdrsize)) == NULL)
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errx(1, "out of memory");
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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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/* 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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hdrsize = 0;
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elf_puthdr(pid, map, hdr, &hdrsize, seginfo.count);
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elf_puthdr(pid, map, hdr, hdrsize, notesz, segoff, seginfo.count);
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/* Write it to the core file. */
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if (write(fd, hdr, hdrsize) == -1)
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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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@ -195,7 +221,7 @@ elf_coredump(int efd __unused, int fd, pid_t pid)
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}
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php++;
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}
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free(hdr);
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sbuf_delete(sb);
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freemap(map);
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}
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@ -257,209 +283,136 @@ each_writable_segment(vm_map_entry_t map, segment_callback func, void *closure)
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}
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static void
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elf_getstatus(pid_t pid, prpsinfo_t *psinfo)
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elf_putnotes(pid_t pid, struct sbuf *sb, size_t *sizep)
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{
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struct kinfo_proc kobj;
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int name[4];
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size_t len;
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name[0] = CTL_KERN;
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name[1] = KERN_PROC;
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name[2] = KERN_PROC_PID;
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name[3] = pid;
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len = sizeof(kobj);
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if (sysctl(name, 4, &kobj, &len, NULL, 0) == -1)
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err(1, "error accessing kern.proc.pid.%u sysctl", pid);
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if (kobj.ki_pid != pid)
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err(1, "error accessing kern.proc.pid.%u sysctl datas", pid);
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strncpy(psinfo->pr_fname, kobj.ki_comm, MAXCOMLEN);
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strncpy(psinfo->pr_psargs, psinfo->pr_fname, PRARGSZ);
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}
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/*
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* Generate the ELF coredump header into the buffer at "dst". "dst" may
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* be NULL, in which case the header is sized but not actually generated.
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*/
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static void
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elf_puthdr(pid_t pid, vm_map_entry_t map, void *dst, size_t *off, int numsegs)
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{
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struct ptrace_lwpinfo lwpinfo;
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struct {
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prstatus_t status;
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prfpregset_t fpregset;
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prpsinfo_t psinfo;
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thrmisc_t thrmisc;
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} *tempdata;
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size_t ehoff;
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size_t phoff;
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size_t noteoff;
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size_t notesz;
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size_t threads;
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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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prstatus_t *status;
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prfpregset_t *fpregset;
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prpsinfo_t *psinfo;
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thrmisc_t *thrmisc;
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ehoff = *off;
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*off += sizeof(Elf_Ehdr);
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phoff = *off;
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*off += (numsegs + 1) * sizeof(Elf_Phdr);
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noteoff = *off;
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if (dst != NULL) {
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if ((tempdata = calloc(1, sizeof(*tempdata))) == NULL)
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errx(1, "out of memory");
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status = &tempdata->status;
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fpregset = &tempdata->fpregset;
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psinfo = &tempdata->psinfo;
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thrmisc = &tempdata->thrmisc;
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} else {
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tempdata = NULL;
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status = NULL;
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fpregset = NULL;
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psinfo = NULL;
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thrmisc = NULL;
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}
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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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if (dst != NULL) {
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psinfo->pr_version = PRPSINFO_VERSION;
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psinfo->pr_psinfosz = sizeof(prpsinfo_t);
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elf_getstatus(pid, psinfo);
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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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}
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elf_putnote(dst, off, "FreeBSD", NT_PRPSINFO, psinfo,
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sizeof *psinfo);
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if (dst != NULL) {
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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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}
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for (i = 0; i < threads; ++i) {
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if (dst != NULL) {
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status->pr_version = PRSTATUS_VERSION;
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status->pr_statussz = sizeof(prstatus_t);
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status->pr_gregsetsz = sizeof(gregset_t);
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status->pr_fpregsetsz = sizeof(fpregset_t);
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status->pr_osreldate = __FreeBSD_version;
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status->pr_pid = tids[i];
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ptrace(PT_GETREGS, tids[i], (void *)&status->pr_reg, 0);
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ptrace(PT_GETFPREGS, tids[i], (void *)fpregset, 0);
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ptrace(PT_LWPINFO, tids[i], (void *)&lwpinfo,
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sizeof(lwpinfo));
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memset(&thrmisc->_pad, 0, sizeof(thrmisc->_pad));
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strcpy(thrmisc->pr_tname, lwpinfo.pl_tdname);
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}
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elf_putnote(dst, off, "FreeBSD", NT_PRSTATUS, status,
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sizeof *status);
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elf_putnote(dst, off, "FreeBSD", NT_FPREGSET, fpregset,
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sizeof *fpregset);
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elf_putnote(dst, off, "FreeBSD", NT_THRMISC, thrmisc,
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sizeof *thrmisc);
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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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}
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notesz = *off - noteoff;
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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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if (dst != NULL) {
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free(tids);
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free(tempdata);
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}
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/* Align up to a page boundary for the program segments. */
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*off = round_page(*off);
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if (dst != NULL) {
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Elf_Ehdr *ehdr;
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Elf_Phdr *phdr;
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struct phdr_closure phc;
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/*
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* Fill in the ELF header.
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*/
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ehdr = (Elf_Ehdr *)((char *)dst + ehoff);
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ehdr->e_ident[EI_MAG0] = ELFMAG0;
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ehdr->e_ident[EI_MAG1] = ELFMAG1;
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ehdr->e_ident[EI_MAG2] = ELFMAG2;
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ehdr->e_ident[EI_MAG3] = ELFMAG3;
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ehdr->e_ident[EI_CLASS] = ELF_CLASS;
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ehdr->e_ident[EI_DATA] = ELF_DATA;
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ehdr->e_ident[EI_VERSION] = EV_CURRENT;
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ehdr->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
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ehdr->e_ident[EI_ABIVERSION] = 0;
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ehdr->e_ident[EI_PAD] = 0;
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ehdr->e_type = ET_CORE;
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ehdr->e_machine = ELF_ARCH;
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ehdr->e_version = EV_CURRENT;
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ehdr->e_entry = 0;
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ehdr->e_phoff = phoff;
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ehdr->e_flags = 0;
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ehdr->e_ehsize = sizeof(Elf_Ehdr);
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ehdr->e_phentsize = sizeof(Elf_Phdr);
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ehdr->e_phnum = numsegs + 1;
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ehdr->e_shentsize = sizeof(Elf_Shdr);
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ehdr->e_shnum = 0;
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ehdr->e_shstrndx = SHN_UNDEF;
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/*
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* Fill in the program header entries.
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*/
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phdr = (Elf_Phdr *)((char *)dst + phoff);
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/* The note segment. */
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phdr->p_type = PT_NOTE;
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phdr->p_offset = noteoff;
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phdr->p_vaddr = 0;
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phdr->p_paddr = 0;
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phdr->p_filesz = notesz;
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phdr->p_memsz = 0;
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phdr->p_flags = 0;
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phdr->p_align = 0;
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phdr++;
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/* All the writable segments from the program. */
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phc.phdr = phdr;
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phc.offset = *off;
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each_writable_segment(map, cb_put_phdr, &phc);
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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 "dst", or just size it if "dst" is NULL.
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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(void *dst, size_t *off, const char *name, int type,
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const void *desc, size_t descsz)
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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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note.n_namesz = strlen(name) + 1;
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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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if (dst != NULL)
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bcopy(¬e, (char *)dst + *off, sizeof note);
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*off += sizeof note;
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if (dst != NULL)
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bcopy(name, (char *)dst + *off, note.n_namesz);
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*off += roundup2(note.n_namesz, sizeof(Elf_Size));
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if (dst != NULL)
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bcopy(desc, (char *)dst + *off, note.n_descsz);
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*off += roundup2(note.n_descsz, sizeof(Elf_Size));
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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);
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free(desc);
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}
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/*
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* Generate the ELF coredump header.
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*/
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static void
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elf_puthdr(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)
|
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{
|
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Elf_Ehdr *ehdr;
|
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Elf_Phdr *phdr;
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struct phdr_closure phc;
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ehdr = (Elf_Ehdr *)hdr;
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phdr = (Elf_Phdr *)((char *)hdr + sizeof(Elf_Ehdr));
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ehdr->e_ident[EI_MAG0] = ELFMAG0;
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ehdr->e_ident[EI_MAG1] = ELFMAG1;
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ehdr->e_ident[EI_MAG2] = ELFMAG2;
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ehdr->e_ident[EI_MAG3] = ELFMAG3;
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ehdr->e_ident[EI_CLASS] = ELF_CLASS;
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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 = ELF_ARCH;
|
||||
ehdr->e_version = EV_CURRENT;
|
||||
ehdr->e_entry = 0;
|
||||
ehdr->e_phoff = sizeof(Elf_Ehdr);
|
||||
ehdr->e_flags = 0;
|
||||
ehdr->e_ehsize = sizeof(Elf_Ehdr);
|
||||
ehdr->e_phentsize = sizeof(Elf_Phdr);
|
||||
ehdr->e_phnum = numsegs + 1;
|
||||
ehdr->e_shentsize = sizeof(Elf_Shdr);
|
||||
ehdr->e_shnum = 0;
|
||||
ehdr->e_shstrndx = SHN_UNDEF;
|
||||
|
||||
/*
|
||||
* Fill in the program header entries.
|
||||
*/
|
||||
|
||||
/* 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_writable_segment(map, cb_put_phdr, &phc);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -530,5 +483,223 @@ readmap(pid_t pid)
|
||||
return (map);
|
||||
}
|
||||
|
||||
/*
|
||||
* Miscellaneous note out functions.
|
||||
*/
|
||||
|
||||
static void *
|
||||
elf_note_prpsinfo(void *arg, size_t *sizep)
|
||||
{
|
||||
pid_t pid;
|
||||
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(prpsinfo_t);
|
||||
|
||||
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);
|
||||
strncpy(psinfo->pr_fname, kip.ki_comm, MAXCOMLEN);
|
||||
strncpy(psinfo->pr_psargs, psinfo->pr_fname, PRARGSZ);
|
||||
|
||||
*sizep = sizeof(*psinfo);
|
||||
return (psinfo);
|
||||
}
|
||||
|
||||
static void *
|
||||
elf_note_prstatus(void *arg, size_t *sizep)
|
||||
{
|
||||
lwpid_t tid;
|
||||
prstatus_t *status;
|
||||
|
||||
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(prstatus_t);
|
||||
status->pr_gregsetsz = sizeof(gregset_t);
|
||||
status->pr_fpregsetsz = sizeof(fpregset_t);
|
||||
status->pr_osreldate = __FreeBSD_version;
|
||||
status->pr_pid = tid;
|
||||
ptrace(PT_GETREGS, tid, (void *)&status->pr_reg, 0);
|
||||
|
||||
*sizep = sizeof(*status);
|
||||
return (status);
|
||||
}
|
||||
|
||||
static void *
|
||||
elf_note_fpregset(void *arg, size_t *sizep)
|
||||
{
|
||||
lwpid_t tid;
|
||||
prfpregset_t *fpregset;
|
||||
|
||||
tid = *(lwpid_t *)arg;
|
||||
fpregset = calloc(1, sizeof(*fpregset));
|
||||
if (fpregset == NULL)
|
||||
errx(1, "out of memory");
|
||||
ptrace(PT_GETFPREGS, tid, (void *)fpregset, 0);
|
||||
|
||||
*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 *
|
||||
procstat_sysctl(void *arg, int what, size_t structsz, size_t *sizep)
|
||||
{
|
||||
size_t len, oldlen;
|
||||
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,
|
||||
(int)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 elfdump = { elf_ident, elf_coredump };
|
||||
TEXT_SET(dumpset, elfdump);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user