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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of libminidump.
Copyright 2012 Lennart Poettering
libminidump is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
libminidump 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with libminidump; If not, see
<http://www.gnu.org/licenses/>.
***/
#include <assert.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include "coredump-util.h"
#include "read-coredump.h"
#define NOTE_SIZE_MAX (1024*1024*10)
int coredump_read_threads(struct context *c) {
off_t offset, length;
int r;
struct thread_info i;
unsigned thread_count;
bool found_prpsinfo = false, found_auxv = false;
bool found_prstatus = false, found_fpregset = false;
assert(c);
assert(CONTEXT_HAVE_COREDUMP(c));
r = coredump_find_note_segment(c->coredump_fd, &c->coredump_header, &offset, &length);
if (r < 0)
return r;
if (r == 0)
return -EIO;
thread_count = 0;
while (length > 0) {
off_t name_offset, descriptor_offset;
char name[16];
ssize_t l;
ElfW(Nhdr) note;
r = coredump_next_note(c->coredump_fd, &offset, &length, ¬e, &name_offset, &descriptor_offset);
if (r < 0)
return r;
if (note.n_namesz >= sizeof(name))
continue;
if (note.n_descsz >= NOTE_SIZE_MAX)
return -EBADMSG;
l = pread(c->coredump_fd, name, note.n_namesz, name_offset);
if (l < 0)
return -errno;
if (l != note.n_namesz)
return -EIO;
name[l] = 0;
fprintf(stderr, "Found note %s, type %u\n", name, note.n_type);
if (strcmp(name, "CORE") == 0 &&
note.n_type == NT_PRSTATUS) {
if (thread_count > 0) {
if (!found_prstatus || !found_fpregset)
return -EIO;
context_add_thread(c, &i);
}
memset(&i, 0, sizeof(i));
thread_count ++;
found_prstatus = true;
found_fpregset = false;
if (note.n_descsz != sizeof(i.prstatus))
return -EIO;
l = pread(c->coredump_fd, &i.prstatus, sizeof(i.prstatus), descriptor_offset);
if (l < 0)
return -errno;
if (l != sizeof(i.prstatus))
return -EIO;
i.tid = i.prstatus.pr_pid;
memcpy(&i.regs, i.prstatus.pr_reg, sizeof(i.regs));
} else if (strcmp(name, "CORE") == 0 &&
note.n_type == NT_PRPSINFO) {
if (found_prpsinfo)
return -EIO;
found_prpsinfo = true;
if (note.n_descsz != sizeof(c->prpsinfo))
return -EIO;
l = pread(c->coredump_fd, &c->prpsinfo, sizeof(c->prpsinfo), descriptor_offset);
if (l < 0)
return -errno;
if (l != sizeof(c->prpsinfo))
return -EIO;
} else if (strcmp(name, "CORE") == 0 &&
note.n_type == NT_AUXV) {
if (found_auxv)
return -EIO;
found_auxv = true;
free(c->auxv.data);
c->auxv.data = malloc(note.n_descsz);
if (!c->auxv.data)
return -ENOMEM;
l = pread(c->coredump_fd, c->auxv.data, note.n_descsz, descriptor_offset);
if (l < 0)
return -errno;
if (l != note.n_descsz)
return -EIO;
c->auxv.size = note.n_descsz;
} else if (strcmp(name, "CORE") == 0 &&
note.n_type == NT_FPREGSET) {
if (found_fpregset)
return -EIO;
found_fpregset = true;
if (note.n_descsz != sizeof(i.fpregs))
return -EIO;
l = pread(c->coredump_fd, &i.fpregs, sizeof(i.fpregs), descriptor_offset);
if (l < 0)
return -errno;
if (l != sizeof(i.fpregs))
return -EIO;
#ifdef __i386
} else if (strcmp(name, "LINUX") == 0 &&
note.n_type == NT_PRXFPREG) {
if (note.n_descsz != sizeof(i.fpxregs))
return -EIO;
l = pread(c->fd, &i.fpxregs, sizeof(i.fpxregs), descriptor_offset);
if (l < 0)
return -errno;
if (l != sizeof(i.fpxregs))
return -EIO;
#endif
} else if (strcmp(name, "LENNART") == 0) {
struct buffer *b;
b = context_find_buffer(c, note.n_type);
if (b) {
r = context_pread_buffer(c->coredump_fd, b, note.n_descsz, descriptor_offset);
if (r < 0)
return r;
}
}
}
if (thread_count > 0) {
if (!found_prstatus || !found_fpregset)
return -EIO;
i.have_prstatus = true;
context_add_thread(c, &i);
}
if (!found_prpsinfo || !found_auxv)
return -EIO;
c->have_prpsinfo = true;
return 0;
}
int coredump_read_maps(struct context *c) {
unsigned long i;
int r;
assert(c);
assert(CONTEXT_HAVE_COREDUMP(c));
for (i = 0; i < c->coredump_header.e_phnum; i++) {
ElfW(Phdr) segment;
r = coredump_read_segment_header(c->coredump_fd, &c->coredump_header, i, &segment);
if (r < 0)
return r;
if (segment.p_type != PT_LOAD)
continue;
r = context_add_mapping(c, segment.p_vaddr, segment.p_vaddr+segment.p_filesz, NULL);
if (r < 0)
return r;
}
return 0;
}
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