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83 lines
3.0 KiB
C
83 lines
3.0 KiB
C
/*
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* Copyright (c) Christos Zoulas 2008.
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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 immediately at the beginning of the file, without modification,
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* 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 FOR
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* 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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if (nbytes <= sizeof(elfhdr))
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return 0;
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u.l = 1;
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(void)memcpy(&elfhdr, buf, sizeof elfhdr);
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swap = (u.c[sizeof(int32_t) - 1] + 1) != elfhdr.e_ident[EI_DATA];
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type = elf_getu16(swap, elfhdr.e_type);
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notecount = ms->elf_notes_max;
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switch (type) {
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#ifdef ELFCORE
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case ET_CORE:
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phnum = elf_getu16(swap, elfhdr.e_phnum);
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if (phnum > ms->elf_phnum_max)
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return toomany(ms, "program headers", phnum);
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flags |= FLAGS_IS_CORE;
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if (dophn_core(ms, clazz, swap, fd,
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(zend_off_t)elf_getu(swap, elfhdr.e_phoff), phnum,
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(size_t)elf_getu16(swap, elfhdr.e_phentsize),
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fsize, &flags, ¬ecount) == -1)
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return -1;
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break;
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#endif
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case ET_EXEC:
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case ET_DYN:
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phnum = elf_getu16(swap, elfhdr.e_phnum);
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if (phnum > ms->elf_phnum_max)
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return toomany(ms, "program", phnum);
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shnum = elf_getu16(swap, elfhdr.e_shnum);
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if (shnum > ms->elf_shnum_max)
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return toomany(ms, "section", shnum);
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if (dophn_exec(ms, clazz, swap, fd,
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(zend_off_t)elf_getu(swap, elfhdr.e_phoff), phnum,
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(size_t)elf_getu16(swap, elfhdr.e_phentsize),
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fsize, shnum, &flags, ¬ecount) == -1)
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return -1;
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/*FALLTHROUGH*/
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case ET_REL:
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shnum = elf_getu16(swap, elfhdr.e_shnum);
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if (shnum > ms->elf_shnum_max)
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return toomany(ms, "section headers", shnum);
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if (doshn(ms, clazz, swap, fd,
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(zend_off_t)elf_getu(swap, elfhdr.e_shoff), shnum,
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(size_t)elf_getu16(swap, elfhdr.e_shentsize),
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fsize, elf_getu16(swap, elfhdr.e_machine),
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(int)elf_getu16(swap, elfhdr.e_shstrndx),
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&flags, ¬ecount) == -1)
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return -1;
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break;
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default:
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break;
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}
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if (notecount == 0)
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return toomany(ms, "notes", ms->elf_notes_max);
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return 1;
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