1 /*
2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
735
736 if ((phbuf = read_program_header_table(lib_fd, lib_ehdr)) == NULL) {
737 return false;
738 }
739
740 // we want to process only PT_LOAD segments that are not writable.
741 // i.e., text segments. The read/write/exec (data) segments would
742 // have been already added from core file segments.
743 for (lib_php = phbuf, i = 0; i < lib_ehdr->e_phnum; i++) {
744 if ((lib_php->p_type == PT_LOAD) && !(lib_php->p_flags & PF_W) && (lib_php->p_filesz != 0)) {
745
746 uintptr_t target_vaddr = lib_php->p_vaddr + lib_base;
747 map_info *existing_map = core_lookup(ph, target_vaddr);
748
749 if (existing_map == NULL){
750 if (add_map_info(ph, lib_fd, lib_php->p_offset,
751 target_vaddr, lib_php->p_memsz) == NULL) {
752 goto err;
753 }
754 } else {
755 // Coredump stores value of p_memsz elf field
756 // rounded up to page boundary.
757
758 if ((existing_map->memsz != page_size) &&
759 (existing_map->fd != lib_fd) &&
760 (ROUNDUP(existing_map->memsz, page_size) != ROUNDUP(lib_php->p_memsz, page_size))) {
761
762 print_debug("address conflict @ 0x%lx (existing map size = %ld, size = %ld, flags = %d)\n",
763 target_vaddr, existing_map->memsz, lib_php->p_memsz, lib_php->p_flags);
764 goto err;
765 }
766
767 /* replace PT_LOAD segment with library segment */
768 print_debug("overwrote with new address mapping (memsz %ld -> %ld)\n",
769 existing_map->memsz, ROUNDUP(lib_php->p_memsz, page_size));
770
771 existing_map->fd = lib_fd;
772 existing_map->offset = lib_php->p_offset;
773 existing_map->memsz = ROUNDUP(lib_php->p_memsz, page_size);
774 }
775 }
776
777 lib_php++;
778 }
779
780 free(phbuf);
781 return true;
782 err:
783 free(phbuf);
784 return false;
785 }
|
1 /*
2 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
735
736 if ((phbuf = read_program_header_table(lib_fd, lib_ehdr)) == NULL) {
737 return false;
738 }
739
740 // we want to process only PT_LOAD segments that are not writable.
741 // i.e., text segments. The read/write/exec (data) segments would
742 // have been already added from core file segments.
743 for (lib_php = phbuf, i = 0; i < lib_ehdr->e_phnum; i++) {
744 if ((lib_php->p_type == PT_LOAD) && !(lib_php->p_flags & PF_W) && (lib_php->p_filesz != 0)) {
745
746 uintptr_t target_vaddr = lib_php->p_vaddr + lib_base;
747 map_info *existing_map = core_lookup(ph, target_vaddr);
748
749 if (existing_map == NULL){
750 if (add_map_info(ph, lib_fd, lib_php->p_offset,
751 target_vaddr, lib_php->p_memsz) == NULL) {
752 goto err;
753 }
754 } else {
755 #ifdef INCLUDE_SA_ATTACH
756 // Coredump stores value of p_memsz elf field
757 // rounded up to page boundary.
758
759 if ((existing_map->memsz != page_size) &&
760 (existing_map->fd != lib_fd) &&
761 (ROUNDUP(existing_map->memsz, page_size) != ROUNDUP(lib_php->p_memsz, page_size))) {
762
763 print_debug("address conflict @ 0x%lx (existing map size = %ld, size = %ld, flags = %d)\n",
764 target_vaddr, existing_map->memsz, lib_php->p_memsz, lib_php->p_flags);
765 goto err;
766 }
767 #endif
768
769 /* replace PT_LOAD segment with library segment */
770 print_debug("overwrote with new address mapping (memsz %ld -> %ld)\n",
771 existing_map->memsz, ROUNDUP(lib_php->p_memsz, page_size));
772
773 existing_map->fd = lib_fd;
774 existing_map->offset = lib_php->p_offset;
775 existing_map->memsz = ROUNDUP(lib_php->p_memsz, page_size);
776 }
777 }
778
779 lib_php++;
780 }
781
782 free(phbuf);
783 return true;
784 err:
785 free(phbuf);
786 return false;
787 }
|